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Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

LARGO hot water system thermal performance test report  

DOE Green Energy (OSTI)

The thermal performance tests and results on the LARGO Solar Hot Water System under natural environmental conditions are presented. Some objectives of these evaluations are to determine the amount of energy collected, the amount of energy delivered to the household as contributed by solar power supplied to operate the system and auxiliary power to maintain tank temperature at proper level, overall system efficiency and to determine temperature distribution within the tank. The tests and evaluation were performed at the Marshall Space Flight Center solar test facility. The Solar Hot Water system is termed a ''Dump-type'' because of the draining system for freeze protection. The solar collector is a single glazed flat plate. An 82-gallon domestic water heater is provided as the energy storage vessel. Water is circulated through the collector and water heater by a 5.3 GPM capacity pump, and control of the pump motor is achieved by a differential temperature controller.

Not Available

1978-11-01T23:59:59.000Z

2

Cornell University Hot Water Report  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot Water System Hot Water System The production and delivery of hot water in the CUSD home is technologically advanced, economical, and simple. Hot water is produced primarily by the evacuated solar thermal tube collectors on the roof of the house. The solar thermal tube array was sized to take care of the majority of our heating and hot water needs throughout the course of the year in the Washington, DC climate. The solar thermal tube array also provides heating to the radiant floor. The hot water and radiant floor systems are tied independently to the solar thermal tube array, preventing the radiant floor from robbing the water heater of much needed thermal energy. In case the solar thermal tubes are not able to provide hot water to our system, the hot water tank contains an electric heating

3

LARGO hot water system long range thermal performance test report. Addendum  

DOE Green Energy (OSTI)

The test procedure used and the test results obtained during the long range thermal performance tests of the LARGO Solar Hot Water System under natural environmental conditions are presented. Objectives of these tests were to determine the amount of energy collected, the amount of power required for system operation, system efficiency temperature distribution and system performance degradation.

Not Available

1978-11-01T23:59:59.000Z

4

Green Systems Solar Hot Water  

E-Print Network (OSTI)

Green Systems Solar Hot Water Heating the Building Co-generation: Heat Recovery System: Solar Thermal Panels (Trex enclosure) Hot Water Storage Tank (TS-5; basement) Hot Water Heaters (HW-1,2; basement) Pre-heats water so water heaters don't need to use as much energy Gas-powered, high efficiency

Schladow, S. Geoffrey

5

Consumer thermal energy storage costs for residential hot water, space heating and space cooling systems  

DOE Green Energy (OSTI)

The cost of household thermal energy storage (TES) in four utility service areas that are representative for hot water, space heating, and space cooling systems in the United States is presented. There are two major sections of the report: Section 2.0 is a technology characterization of commercially available and developmental/conceptual TES systems; Section 3.0 is an evaluation of the consumer cost of the three TES systems based on typical designs in four utility service areas.

None

1976-11-30T23:59:59.000Z

6

Light-stable-isotope studies of spring and thermal waters from the Roosevelt Hot Springs and Cove Fort/Sulphurdale Thermal areas and of clay minerals from the Roosevelt Hot Springs thermal area  

DOE Green Energy (OSTI)

The isotopic compositions of hydrogen and oxygen have been determined for spring waters and thermal fluids from the Roosevelt Hot Springs and Cove Fort-Sulphurdale thermal areas, for clay mineral separates from shallow alteration of the acid-sulfate type in the Roosevelt Hot Springs area, and for spring and well waters from the Goshen Valley area of central Utah. The water analyses in the Roosevelt Hot Springs thermal area confirm the origin of the thermal fluids from meteoric water in the Mineral Range. The water analyses in the Cove Fort-Sulphurdale thermal area restrict recharge areas for this system to the upper elevations of the Pavant and/or Tushar Ranges. The low /sup 18/O shift observed in these thermal fluids (+0.7 permil) implies either high water/rock ratios or incomplete isotope exchange or both, and further suggests minimal interaction between the thermal fluid and marble country rock in the system. Hydrogen and oxygen-isotope data for clay mineral separates from shallow alteration zones in the Roosevelt Hot Springs thermal system suggest that the fluids responsible for the shallow acid-sulfate alteration were in part derived from condensed steam produced by boiling of the deep reservoir fluid. The isotope evidence supports the chemical model proposed by Parry et al. (1980) for origin of the acid-sulfate alteration at Roosevelt Hot Springs. The isotope analyses of spring and well waters from the Goshen Valley area indicate only a general correlation of isotope composition, salinity and chemical temperatures.

Bowman, J.R.; Rohrs, D.T.

1981-10-01T23:59:59.000Z

7

Texas Hot Water Report  

NLE Websites -- All DOE Office Websites (Extended Search)

coil hot water storage tank, a backup instantaneous electric water heater, a hydronic fan coil unit for space heating, and an efficient plumbing manifold for domestic hot water...

8

Madrid Hot Water Report  

NLE Websites -- All DOE Office Websites (Extended Search)

Comprehensive Assessment of Hot Water System Page 1 of 2 HOT WATER SYSTEM In general, the plumbing system in MAGIC BOX is designed to concentrate all devices, be they storage,...

9

Geochemistry of thermal/mineral waters in the Clear Lake region, California, and implications for hot dry rock geothermal development  

DOE Green Energy (OSTI)

Thermal/mineral waters of the Clear Lake region are broadly classified as thermal meteoric and connote types based on chemical and isotopic criteria. Ratios of conservative components such as B/Cl are extremely different among all thermal/mineral waters of the Clear Lake region except for clusters of waters emerging from specific areas such as the Wilbur Springs district and the Agricultural Park area south of Mt. Konocti. In contrast, ratios of conservative components in large, homogeneous geothermal reservoirs are constant. Stable isotope values of Clear Lake region waters show a mixing trend between thermal meteoric and connote end-members. The latter end-member has enriched [delta]D as well as enriched d[sup l8]O, very different from typical high-temperature geothermal reservoir waters. Tritium data and modeling of ages indicate most Clear Lake region waters are 500 to > 10,000 yr., although mixing of old and young components is implied by the data. The age of end-member connate water is probably > 10,000 yr. Subsurface equilibration temperature of most thermal/mineral waters of the Clear Lake region is [le] 150[degrees]C based on chemical geothermometers but it is recognized that Clear Lake region waters are not typical geothermal fluids and that they violate rules of application of many geothermometers. The combined data indicate that no large geothermal reservoir underlies the Clear Lake region and that small localized reservoirs have equilibration temperatures [le] 150[degrees]C (except for Sulphur Bank Mine). Hot dry rock technologies are the best way to commercially exploit the known high temperatures existing beneath the Clear Lake region, particularly within the main Clear Lake volcanic field.

Goff, F.; Adams, A.I.; Trujillo, P.E.; Counce, D.; Mansfield, J.

1993-02-01T23:59:59.000Z

10

Solar hot water heater  

SciTech Connect

A solar hot water heater includes an insulated box having one or more hot water storage tanks contained inside and further having a lid which may be opened to permit solar radiation to heat a supply of water contained within the one or more hot water storage tanks. A heat-actuated control unit is mounted on an external portion of the box, such control unit having a single pole double throw thermostat which selectively activates an electric winch gear motor to either open or close the box lid. The control unit operates to open the lid to a predetermined position when exposed to the sun's rays, and further operates to immediately close the lid in response to any sudden drop in temperature, such as might occur during a rainstorm, clouds moving in front of the sun, or the like.

Melvin, H.A.

1982-12-28T23:59:59.000Z

11

Hot water supply system  

SciTech Connect

A hot water supply system is described which consists of: a boiler having an exhaust; solar panels; and a frame supporting the solar panels and including a compartment beneath the solar panels, the boiler exhaust termining in the compartment beneath the solar panels, the boiler being within the compartment.

Piper, J.R.

1986-06-10T23:59:59.000Z

12

Hybrid photovoltaic thermal collector (PVT) for the production of hot water and electricity  

Science Conference Proceedings (OSTI)

The main concept of developing the hybrid Photovoltaic/Thermal (PV/T) is to increase the efficiency of the solar and thermal collector. It is known that the efficiency of the Photovoltaic solar collector is decreases when the ambient temperature increased ... Keywords: absorber collectors, hybrid photovoltaic thermal (PVT), thermal and electrical efficiency

Adnan Ibrahim; K. Sopian; M. Y. Othman; M. H. Ruslan; M. A. Alghoul; M. Yahya; Azami Zaharim

2008-11-01T23:59:59.000Z

13

Virginia Tech Hot Water Report  

NLE Websites -- All DOE Office Websites (Extended Search)

The team chose to use a water-to-water heat pump (WWHP) connected to an earth coupled heat exchanger to provide water heating. This system provides not only domestic hot water...

14

Potential of thermal insulation and solar thermal energy in domestic hot water and space heating and cooling sectors in Lebanon in the period 2010 - 2030.  

E-Print Network (OSTI)

??The potential of thermal insulation and solar thermal energy in domestic water heating, space heating and cooling in residential and commercial buildings Lebanon is studied… (more)

Zaatari, Z.A.R.

2012-01-01T23:59:59.000Z

15

Performance Evaluation of Hot Water Efficiency Plumbing System Using Thermal Valve  

E-Print Network (OSTI)

In Korea two popular water distribution systems—the branch type and the separate type systems—have serious drawbacks. The branch type suffers from temperature instability while the separate type suffers from excessive piping. Neither of them re-circulates water. The system proposed in this paper utilizes a water-conserving piping system with a thermostat valve. This paper compares the proposed system with that of the separate type. Our findings show that the proposed system wastes less water. After re-circulating for 78-87 seconds, water is available at set point temperature (40°C). Also, when multiple water taps are in use, the average temperature deviation is less than 0.6°C. Moreover, the proposed system has 50% less flow rate than the separate type system.

Cha, K. S.; Park, M. S.; Seo, H. Y.

2010-08-01T23:59:59.000Z

16

NREL: Learning - Solar Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot Water Hot Water Photo of solar collectors on a roof for a solar hot water system. For solar hot water systems, flat-plate solar collectors are typically installed facing south on a rooftop. The shallow water of a lake is usually warmer than the deep water. That's because the sunlight can heat the lake bottom in the shallow areas, which in turn, heats the water. It's nature's way of solar water heating. The sun can be used in basically the same way to heat water used in buildings and swimming pools. Most solar water heating systems for buildings have two main parts: a solar collector and a storage tank. The most common collector is called a flat-plate collector. Mounted on the roof, it consists of a thin, flat, rectangular box with a transparent cover that faces the sun. Small tubes

17

University of Colorado Hot Water Report  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot water system Brief Contest Report Hot water system Brief Contest Report Recognizing that the sun is an abundant source of clean energy that reaches the earth at an intensity of up to 1000 Watts/m 2 , the University of Colorado will be showcasing top-of-the-line technology in which solar radiation is converted into heat for the purposes of heating the home and providing domestic hot water. Solar Thermal System - Basics Colorado's 2005 Solar Decathlon team has chosen to harness the sun's thermal energy with 4 arrays of 20 Mazdon evacuated tube collectors manufactured by Thermomax, as shown in Figure 1 below. These collectors have incredibly high efficiencies - about 60% over the course of an entire day. In addition, the evacuated tube collectors resist internal condensation and corrosion more effectively than their counterparts

18

Thermal performance and economics of solar space and hot water heating system on Long Island, New York. [F-chart method  

DOE Green Energy (OSTI)

A practical method for designing solar space and water heating systems, called the ''f-chart'' method, is described with the results calculated for Long Island, New York. The solar heating systems to be considered consist of a solar collector which uses either liquid or air, an energy storage which can be either a water tank or a pebble bed, and an auxiliary energy source which supplies heat when solar energy is not available. Solar heated water from storage can be used either for space heating or for preheating the domestic hot water. The results of the ''f-chart'' analysis can simply be expressed as follows. For the thermal performance, Annual Load Fraction Supplied by Solar Energy versus Collector Area, and for the economic performance, Life Cycle Cost Savings versus Collector Area.

Auh, P C

1978-06-01T23:59:59.000Z

19

Analysis Model for Domestic Hot Water Distribution Systems: Preprint  

DOE Green Energy (OSTI)

A thermal model was developed to estimate the energy losses from prototypical domestic hot water (DHW) distribution systems for homes. The developed model, using the TRNSYS simulation software, allows researchers and designers to better evaluate the performance of hot water distribution systems in homes. Modeling results were compared with past experimental study results and showed good agreement.

Maguire, J.; Krarti, M.; Fang, X.

2011-11-01T23:59:59.000Z

20

Stable isotope investigation of fluids and water-rock interaction in the Roosevelt Hot Springs thermal area, Utah  

DOE Green Energy (OSTI)

Carbon-hydrogen-oxygen isotope compositions have been measured in regional cold waters, geothermal fluids, and hydrothermally altered rocks from the Roosevelt Hot Springs geothermal area. These data have been used, in conjunction with other geological and geochemical data from this geothermal system, to place some limits on the origin of geothermal fluids and reservoir carbon, the fluid recharge area, physical-chemical environment of hydrothermal alteration, and relative permeability of the geothermal system. The similarity of hydrogen isotope compositions of local meteoric water and geothermal reservoir fluid indicate that the geothermal fluids are virtually entirely of surface derivation. An isotopically reasonable source area would be the Mineral Mountains directly to the east of the Roosevelt system. Hydrothermal calcite appears to be in isotopic equilibrium with the deep reservoir fluid. The deltaC/sup 13/ values of deep calcites and T- pH-f0/sub 2/ conditions of the reservoir defined by measured temperature, fluid chemistry, and alteration mineralogy fix the delta/sup 13/C value of the geothermal system to -5 to -6.5% (PDB). These values do not unambiguously define any one source or process, however. There is a relatively small increase in /sup 18/O of geothermal fluids relative to their cold surface water precursors and significant /sup 18/O depletion accompanying hydrothermal alteration of the granitic host rock. These isotopic shifts indicate a high ratio of geothermal fluid to altered rock for the geothermal system, implying relatively rapid (geologically) recirculation rates and significant permeability of the geothermal system.

Bowman, J.R.

1979-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Commonwealth Solar Hot Water Commercial Program | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commercial Program Commonwealth Solar Hot Water Commercial Program Eligibility Agricultural Commercial Fed. Government Industrial Local Government Multi-Family Residential...

22

dist_hot_water.pdf  

U.S. Energy Information Administration (EIA) Indexed Site

District Hot Water Usage Form District Hot Water Usage Form 1999 Commercial Buildings Energy Consumption Survey (CBECS) 1. Timely submission of this report is mandatory under Public Law 93-275, as amended. 2. This completed questionnaire is due by 3. Data reported on this questionnaire are for the entire building identified in the label to the right. 4. Data may be submitted directly on this questionnaire or in any other format, such as a computer-generated listing, which provides the same i nformation and is conve nient for y our company. a. You may submit a single report for the entire building, or if it i s easier, a separate report for each of several accounts in the building. These will then be aggregated by the survey contractor. b. If you are concerned about your individual account information, you may c

23

HOt Water SavEr (HOWSE) Project. Final report  

SciTech Connect

The dishwasher effluent is pumped into the flue of the exchange tank by the normal dishwasher pump (or auxiliary pump). The effluent is stored in this tank until next operation of the dishwasher. Thus, thermal equilibrium can be reached between the tank and the effluent, promoting high efficiency. The output from the exchange tank feeds the household normal hot water tank, reducing its requirement for fuel as the input water temperature is higher. Counterflow exchangers may be used for other hot water users where the flow and drain is continuous. In this case the discharged hot (or warm) water flows counter to the flow of cold water into the hot water heater. The two flows are closely coupled thermally but not in direct contract so they cannot mix. Counter flow exchangers and storage type exchangers may be used in the same installation.

Olson, W.R.

1981-12-31T23:59:59.000Z

24

Solar Hot Water Contractor Licensing | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hot Water Contractor Licensing Hot Water Contractor Licensing Solar Hot Water Contractor Licensing < Back Eligibility Installer/Contractor Savings Category Heating & Cooling Solar Water Heating Program Info State Arkansas Program Type Solar/Wind Contractor Licensing Arkansas offers several limited, specialty licenses for solar thermal installers under the general plumbing license. There are three specialty classifications available for solar thermal installers: a Restricted Solar Mechanic license, a Supervising Solar Mechanic license, and a Solar Mechanic Trainee classification. Installers with a Restricted Solar Mechanic license can install and maintain systems used to heat domestic hot water, but are not allowed to perform any other plumbing work. Individuals holding a Supervising Solar Mechanic license are able to supervise, install

25

Solar Hot Water Contractor Licensing | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Hot Water Contractor Licensing Solar Hot Water Contractor Licensing Solar Hot Water Contractor Licensing < Back Eligibility Installer/Contractor Savings Category Heating & Cooling Solar Water Heating Program Info State Maine Program Type Solar/Wind Contractor Licensing In order to be eligible for Maine's solar thermal rebate program, systems must be installed by licensed plumbers who have received additional certification for solar thermal systems from the North American Board of Certified Energy Practitioners (NABCEP). The state solar thermal rebate program maintains a list of Efficiency Maine registered vendors/installers. In addition, Efficiency Maine has information for vendors interested in becoming registered and listed on the [http://www.efficiencymaine.com/at-home/registered-vendor-locator web

26

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular Salt Consolidation, Constitutive Model and Micromechanics Coupled Thermal-Hydrological-Mechanical Processes...

27

Prototype solar heating and hot water systems  

DOE Green Energy (OSTI)

This document is a collection of two quarterly status reports from Colt, Inc., covering the period from October 1, 1977 through June 30, 1978. Colt is developing two prototype solar heating and hot water systems consisting of the following subsystems: collector, storage, control, transport, hot water, and auxiliary energy. The two systems are being installed at Yosemite, California and Pueblo, Colorado.

Not Available

1978-04-01T23:59:59.000Z

28

Domestic Hot Water Event Schedule Generator - Energy ...  

Residential hot water use in the United States accounts for 14-25% of all the energy consumed in a home. With the rise of more advanced water heating ...

29

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Exploration Activity Details Location Hot Springs Ranch Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes In 2005, Nevada Geothermal Power Company drilled four geothermal gradient wells, PVTG-1, -2, -3, and -4, and all four encountered geothermal fluids. The holes provided valuable water geochemistry, supporting the geothermometry results obtained from the hot springs and Magma well. The temperature data gathered from all the wells clearly indicates the presence of a major plume of thermal water centered on the Pumpernickel Valley

30

DOE Solar Decathlon: 2005 Contests and Scoring - Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

teams will install systems that can do even more. The Hot Water contest demonstrates that solar hot water heating systems can supply all the hot water we use daily - to bathe and...

31

Solar heating/cooling and domestic hot-water systems  

Science Conference Proceedings (OSTI)

Increasing awareness of global warming forces policy makers and industries to face two challenges: reducing greenhouse gas emissions and securing stable energy supply against ever-increasing world energy consumption, which is projected to increase by ... Keywords: buildings heating, domestic hot-water, energetical analysis, renewable energy sources, solar cooling technologies, solar energy collection, solar thermal systems

Ioan Sârbu; Marius Adam

2011-02-01T23:59:59.000Z

32

Commercial Solar Hot Water Financing Program | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the commercial solar hot water industry in Massachusetts. Commercial and non-profit building owners can use the financing program to install solar hot water systems that heat...

33

Direct Use for Building Heat and Hot Water Presentation Slides...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Direct Use for Building Heat and Hot Water Presentation Slides and Text Version Direct Use for Building Heat and Hot Water Presentation Slides and Text Version Download...

34

FEMP Solar Hot Water Calculator | Open Energy Information  

Open Energy Info (EERE)

Solar Hot Water Calculator Jump to: navigation, search Name FEMP Solar Hot Water Calculator Abstract Online tool to help Federal agencies meet Energy Independence and Security Act...

35

Thermal Behavior of a Hot Moving Steel Plate during Jet ...  

Science Conference Proceedings (OSTI)

Presentation Title, Thermal Behavior of a Hot Moving Steel Plate during Jet Impingement Cooling. Author(s), Amir Hossein Nobari, Vladan Prodanovic, ...

36

Thermal Gradient Holes At Breitenbush Hot Springs Area (Ingebritsen...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Breitenbush Hot Springs Area (Ingebritsen, Et Al., 1993)...

37

Thermal Gradient Holes At Pilgrim Hot Springs Area (DOE GTP)...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Pilgrim Hot Springs Area (DOE GTP) Exploration Activity Details...

38

Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al., 2004) Exploration...

39

Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Exploration...

40

Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al., 2008) Exploration...

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Hot tips on water heating  

SciTech Connect

Water-heater manufacturers responded to the call for energy conservation with innovations and efficiency standards for the home, business, and plant. Conventional tank-type water heaters offer better design and insulation, but the heat-pump water heater offers the highest efficiency. Available in add-on units and integral units, they now represent up to 40% of manufacturers' sales. Other advances are the desuperheater devices which recapture air-conditioner waste heat, solar-water-heating systems, instantaneous water heaters, and industrial heat-recovery systems for process water. 1 figure. (DCK)

Forker, J.

1982-03-01T23:59:59.000Z

42

Water Heaters and Hot Water Distribution Systems  

E-Print Network (OSTI)

gas water heaters; and pressure loss calculations for residentialgas water heaters; and pressure loss calculations for residential

Lutz, Jim

2012-01-01T23:59:59.000Z

43

Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al.,  

Open Energy Info (EERE)

Hot Springs Area (Shevenell, Et Al., Hot Springs Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Spencer Hot Springs Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the geothermal community. Exploration holes at Tungsten Mountain and McGuiness Hills (Spencer Hot Springs?) in 2004 and 2005 encountered hot water and steam at depths of meters with fluid geothermometry indicating reservoir temperatures of 170 to 200oC. More information can be obtained from the Nevada Bureau of Mines and Geology web

44

Water Heaters and Hot Water Distribution Systems  

E-Print Network (OSTI)

The effect on water and gas usage from cross-flow betweencontrols have on water and gas usage over a large number ofsystems, and their water and gas usage. Hourly schedules for

Lutz, Jim

2012-01-01T23:59:59.000Z

45

Residential hot water distribution systems: Roundtablesession  

Science Conference Proceedings (OSTI)

Residential building practice currently ignores the lossesof energy and water caused by the poor design of hot water systems. Theselosses include: combustion and standby losses from water heaters, thewaste of water (and energy) while waiting for hot water to get to thepoint of use; the wasted heat as water cools down in the distributionsystem after a draw; heat losses from recirculation systems and thediscarded warmth of waste water as it runs down the drain. Severaltechnologies are available that save energy (and water) by reducing theselosses or by passively recovering heat from wastewater streams and othersources. Energy savings from some individual technologies are reported tobe as much as 30 percent. Savings calculations of prototype systemsincluding bundles of technologies have been reported above 50 percent.This roundtable session will describe the current practices, summarizethe results of past and ongoing studies, discuss ways to think about hotwater system efficiency, and point to areas of future study. We will alsorecommend further steps to reduce unnecessary losses from hot waterdistribution systems.

Lutz, James D.; Klein, Gary; Springer, David; Howard, Bion D.

2002-08-01T23:59:59.000Z

46

STATE OF CALIFORNIA DOMESTIC HOT WATER (DHW)  

E-Print Network (OSTI)

: Heater Type CEC Certified Mfr Name & Model Number Distribution Type (Std, Point-of- Use, etc; and Pipe insulation for steam hydronic heating systems or hot water systems >15 psi, meets the requirements six or fewer dwelling units which have (1) less than 25' of distribution piping outdoors; (2) zero

47

Water Heaters and Hot Water Distribution Systems  

E-Print Network (OSTI)

Water Distribution System Recommendations for the 2008 Title- 24 Residential Building Energy Efficiency Standards .. 4 Multi-FamilyWater Distribution System Recommendations for the 2008 Title- 24 Residential Building Energy Efficiency Standards 11 Multi-FamilyWater Distribution System Recommendations for the 2008 Title- 24 Residential Building Energy Efficiency Standards 48 Multi-Family

Lutz, Jim

2012-01-01T23:59:59.000Z

48

Alternatives for reducing hot-water bills  

DOE Green Energy (OSTI)

A two stage approach to reducing residential water heating bills is described. In Stage I, simple conservation measures were included to reduce the daily hot water energy consumption and the energy losses from the water tank. Once these savings are achieved, Stage II considers more costly options for further reducing the water heating bill. Four alternatives are considered in Stage II: gas water heaters; solar water heaters (two types); heat pump water heaters; and heat recovery from a heat pump or air conditioner. To account for variations within the MASEC region, information on water heating in Rapid City, Minneapolis, Chicago, Detroit, and Kansas City is presented in detail. Information on geography, major population centers, fuel prices, climate, and state solar incentives is covered. (MCW)

Bennington, G.E.; Spewak, P.C.

1981-06-01T23:59:59.000Z

49

home power 114 / august & september 2006 in Solar Hot Water  

E-Print Network (OSTI)

water entering the heat exchanger, and the hot water being produced. "I don't know..." I replied. The graphs show that the ultimate temperature of the solar-produced hot water is indeed higher therms) Percentage of hot water produced annually: Approximately 70 percent Equipment Collectors: Two

Knowles, David William

50

Solar Hot Water Resources and Technologies | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Hot Water Resources and Technologies Solar Hot Water Resources and Technologies Solar Hot Water Resources and Technologies October 7, 2013 - 11:49am Addthis Photo of a standalone solar hot water system standing in front of a clothesline with a backdrop of evergreen trees. This solar hot water system tracks sunlight using a standalone, single-axis mount to optimize hot water production for residential applications. This page provides a brief overview of solar hot water (SHW) technologies supplemented by specific information to apply SHW within the Federal sector. Overview Although a large variety of solar hot water systems exist, the basic technology is simple. A collector absorbs and transfers heat from the sun to water, which is stored in a tank until needed. Active solar heating systems use circulating pumps and controls. These are more expensive but

51

Arnold Schwarzenegger WATER HEATERS AND HOT WATER  

E-Print Network (OSTI)

controls. This response applies to markets that have a demand for central water heating systems Distribution Systems Subtask 2.1 Multifamily Water Heating Construction Practices, Pricing and Availability systems in multifamily buildings. This market characterization study is helping HMG develop

52

Thermal Water of Utah Topical Report  

DOE Green Energy (OSTI)

Western and central Utah has 16 areas whose wells or springs yield hot water (35 C or higher), warm water (20-34.5 C), and slightly warm water (15.5-19.5 C). These areas and the highest recorded water temperature for each are: Lower Bear River Area, 105 C; Bonneville Salt Flats, 88 C; Cove Fort-Sulphurdale, 77 C; Curlew Valley, 43 C; East Shore Area, 60 C; Escalante Desert, 149 C; Escalante Valley (Roosevelt, 269 C, and Thermo, 85C); Fish Springs, 60.5 C; Grouse Creek Valley, 42 C; Heber Valley (Midway, 45 C); Jordan Valley, 58.5 C; Pavant Valley-Black Rock Desert, 67 C; Sevier Desert ( Abraham-Crater Hot Springs, 82 C); Sevier Valley (Monroe-Red Hill, 76.5 C, and Joseph Hot Spring, 64 C); Utah Valley, 46 C; and Central Virgin River Basin, 42 C. The only hot water in eastern Utah comes from the oil wells of the Ashley Valley Oil Field, which in 1977 yielded 4400 acre-feet of water at 43 C to 55 C. Many other areas yield warm water (20 to 34.5 C) and slightly warm water (15.5 to 19.5 C). With the possible exception of the Roosevelt KGRA, Crater Hot Springs in the Sevier Desert, Escalante Desert, Pavant-Black Rock, Cove Fort-Sulphurdale, and Coyote Spring in Curlew Valley, which may derive their heat from buried igneous bodies, the heat that warms the thermal water is derived from the geothermal gradient. Meteoric water circulates through fractures or permeable rocks deep within the earth, where it is warmed; it then rises by convection or artesian pressure and issues at the surface as springs or is tapped by wells. Most thermal springs thus rise along faults, but some thermal water is trapped in confined aquifers so that it spreads laterally as it mixes with and warms cooler near-surface water. This spreading of thermal waters is evident in Cache Valley, in Jordan Valley, and in southern Utah Valley; likely the spreading occurs in many other artesian basins where it has not yet been recognized. In the East Shore Area thermal water trapped in confined aquifers warms water in overlying aquifers. Some of the areas of hot water, such as Roosevelt, Pavant-Black Rock, and Cove Fort-Sulphurdale, probably have a potential to produce electricity; the estimated potential at Roosevelt is 300 megawatts. But the many areas of warm and hot water whose temperatures are too low to produce electricity may still have their waters utilized for space heating, as is planned for Monroe, for greenhouses, and for the processing of farm produce. In this report are tables that give records of about 1500 thermal springs and wells, 66 yield hot water, more than 400 yield warm water, and more than 1000 yield slightly warm water. The records include location, ownership, temperature, yield, depth (of wells), geologic unit, and some chemical analyses.

Goode, Harry D.

1978-11-01T23:59:59.000Z

53

Federal Energy Management Program: Solar Hot Water Resources and  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Hot Water Solar Hot Water Resources and Technologies to someone by E-mail Share Federal Energy Management Program: Solar Hot Water Resources and Technologies on Facebook Tweet about Federal Energy Management Program: Solar Hot Water Resources and Technologies on Twitter Bookmark Federal Energy Management Program: Solar Hot Water Resources and Technologies on Google Bookmark Federal Energy Management Program: Solar Hot Water Resources and Technologies on Delicious Rank Federal Energy Management Program: Solar Hot Water Resources and Technologies on Digg Find More places to share Federal Energy Management Program: Solar Hot Water Resources and Technologies on AddThis.com... Energy-Efficient Products Technology Deployment Renewable Energy Federal Requirements Renewable Resources & Technologies

54

Solar-hot-water-heater lease program  

SciTech Connect

Ten domestic hot-water solar systems were installed, leased to homeowners, and monitored for two years. All of the systems were installed as back-ups to electric water heaters. The systems consist of two to four collectors, a solar storage tank (as well as the existing non-solar heater), and a heat exchanger package. Eight are three-collector systems, one is a four-collector and one a two-collector system. The systems were sized according to family size and predicted hot water demand. The monitoring consists of a separate KW reading on the non-solar water heater, a reading of gallons of how water consumed, and hot and cold outlet temperatures. The purpose for the study was fourfold: (1) to determine the level of acceptance by the general public of solar water heaters if available on a lease rather than a purchase basis; (2) to measure the actual energy savings to the average homeowner in central Illinois with a solar water heater; (3) to measure the potential reduction of Cilco's energy production requirements, should there be widespread utilization of these systems; and (4) to determine the feasibility of an entrepreneur making these systems available on a rental basis and remaining a going concern. The results of this study indicate that the leasing of solar equipment to homeowners has a more widespread acceptance than the direct purchase of such systems. Homeowners, however, do not want to spend as much money on monthly lease payments as the supplier of the equipment would deem necessary. This seriously questions the feasibility of an entrepreneurial leasing program.

Rutherford, S.

1983-04-01T23:59:59.000Z

55

Efficiency of Steam and Hot Water Heat Distribution Systems  

E-Print Network (OSTI)

Efficiency of Steam and Hot Water Heat Distribution Systems Gary Phetteplace September 1995- tion medium (steam or hot water) and temperature for heat distribution systems. The report discusses the efficiency of both steam and hot water heat distribution systems in more detail. The results of several field

56

Building America Top Innovations Hall of Fame Profile Â… Model Simulating Real Domestic Hot Water Use  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and the Davis Energy Group used the and the Davis Energy Group used the Domestic Hot Water Event Schedule Generator to accurately quantify effects of low and high water usage on distribution system measures such as pipe insulation, home run plumbing, and demand-controlled recirculation loops. As progress continues with high-R, tightly sealed thermal enclosures, domestic hot water becomes an increasingly important energy use in high-performance homes. Building America research has improved our ability to model hot water use so new hot water technologies can be more accurately assessed and more readily integrated into high-performance homes. Energy savings for certain residential building technologies depend greatly on occupant behavior. Domestic hot water use is a good example. Simulating

57

The Chilled Water and Hot Water Building Differential Pressure Setpoint Calculation - Chilled Water and Hot Water Pump Speed Control  

E-Print Network (OSTI)

More and more variable frequency devices (VFD) are being installed on the chilled water and hot water pumps on the TAMU campus. Those pump speeds are varied to maintain chilled water or hot water building deferential pressure (DP) or return temperature or flow rate at their setpoints. The chilled water and hot water DP setpoint or return temperature setpoint or flow rate setpoint was a constant value or reset based on outside air temperature. In some buildings, the chilled water and hot water DP setpoints were reset based on flow rate, but in many instances those setpoint schedules were either too low to maintain enough building DP requirement or too high and consumed excess energy. The building DP reset schedule based on flow rate is studied and compared with the other pump speed control methods. Because the building DP setpoint based on flow rate method is achieved by tracking the load change, it saves energy than the other methods. In this paper its calculation procedure is generated and the example of the building DP calculation is given.

Turner, W. D.; Bruner, H., Jr.; Claridge, D.; Liu, C.; Deng, S.

2002-01-01T23:59:59.000Z

58

THERMAL PROCESSES GOVERNING HOT-JUPITER RADII  

SciTech Connect

There have been many proposed explanations for the larger-than-expected radii of some transiting hot Jupiters, including either stellar or orbital energy deposition deep in the atmosphere or deep in the interior. In this paper, we explore the important influences on hot-Jupiter radius evolution of (1) additional heat sources in the high atmosphere, the deep atmosphere, and deep in the convective interior; (2) consistent cooling of the deep interior through the planetary dayside, nightside, and poles; (3) the degree of heat redistribution to the nightside; and (4) the presence of an upper atmosphere absorber inferred to produce anomalously hot upper atmospheres and inversions in some close-in giant planets. In particular, we compare the radius expansion effects of atmospheric and deep-interior heating at the same power levels and derive the power required to achieve a given radius increase when night-side cooling is incorporated. We find that models that include consistent day/night cooling are more similar to isotropically irradiated models when there is more heat redistributed from the dayside to the nightside. In addition, we consider the efficacy of ohmic heating in the atmosphere and/or convective interior in inflating hot Jupiters. Among our conclusions are that (1) the most highly irradiated planets cannot stably have uB {approx}> 10 km s{sup -1} G over a large fraction of their daysides, where u is the zonal wind speed and B is the dipolar magnetic field strength in the atmosphere, and (2) that ohmic heating cannot in and of itself lead to a runaway in planet radius.

Spiegel, David S. [Astrophysics Department, Institute for Advanced Study, Princeton, NJ 08540 (United States); Burrows, Adam, E-mail: dave@ias.edu, E-mail: burrows@astro.princeton.edu [Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)

2013-07-20T23:59:59.000Z

59

Hot water can freeze faster than cold?!?  

E-Print Network (OSTI)

We review the Mpemba effect, where intially hot water freezes faster than initially cold water. While the effect appears impossible at first sight, it has been seen in numerous experiments, was reported on by Aristotle, Francis Bacon, and Descartes, and has been well-known as folklore around the world. It has a rich and fascinating history, which culminates in the dramatic story of the secondary school student, Erasto Mpemba, who reintroduced the effect to the twentieth century scientific community. The phenomenon, while simple to describe, is deceptively complex, and illustrates numerous important issues about the scientific method: the role of skepticism in scientific inquiry, the influence of theory on experiment and observation, the need for precision in the statement of a scientific hypothesis, and the nature of falsifiability. We survey proposed theoretical mechanisms for the Mpemba effect, and the results of modern experiments on the phenomenon. Studies of the observation that hot water pipes are more likely to burst than cold water pipes are also described.

Monwhea Jeng

2005-12-29T23:59:59.000Z

60

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular Salt Consolidation, Constitutive Model and Micromechanics Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular Salt Consolidation, Constitutive Model and Micromechanics The report addresses granular salt reconsolidation from three vantage points: laboratory testing, modeling, and petrofabrics. The experimental data 1) provide greater insight and understanding into the role of elevated temperature and pressure regimes on physical properties of reconsolidated crushed salt, 2) can supplement an existing database used to develop a reconsolidation constitutive model and 3) provide data for model evaluation. The constitutive model accounts for the effects of moisture through pressure solution and dislocation creep, with both terms dependent

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular Salt Consolidation, Constitutive Model and Micromechanics Coupled Thermal-Hydrological-Mechanical Processes in Salt, Hot Granular Salt Consolidation, Constitutive Model and Micromechanics The report addresses granular salt reconsolidation from three vantage points: laboratory testing, modeling, and petrofabrics. The experimental data 1) provide greater insight and understanding into the role of elevated temperature and pressure regimes on physical properties of reconsolidated crushed salt, 2) can supplement an existing database used to develop a reconsolidation constitutive model and 3) provide data for model evaluation. The constitutive model accounts for the effects of moisture through pressure solution and dislocation creep, with both terms dependent

62

Savings Project: Insulate Hot Water Pipes for Energy Savings | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Insulate Hot Water Pipes for Energy Savings Insulate Hot Water Pipes for Energy Savings Savings Project: Insulate Hot Water Pipes for Energy Savings Addthis Project Level Medium Energy Savings $8-$12 annually Time to Complete 3 hours for a small house Overall Cost $10-$15 Insulating water pipes can save you water, energy, and money. | Photo courtesy of iStockphoto.com/nsj-images Insulating water pipes can save you water, energy, and money. | Photo courtesy of iStockphoto.com/nsj-images Insulating your hot water pipes reduces heat loss and can raise water temperature 2°F-4°F hotter than uninsulated pipes can deliver, allowing for a lower water temperature setting. You also won't have to wait as long for hot water when you turn on a faucet or showerhead, which helps conserve water. Paying for someone to insulate your pipes-as a project on its own-may

63

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

in Brazil's hot humid climate zone. Building and Environmentin moderate thermal climate zones. Building and EnvironmentBrazil's hot humid climate zone. Building and Environment,

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

64

Thermal Gradient Holes At Hot Pot Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Hot Pot Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hot Pot Area (DOE GTP) Exploration Activity...

65

Geothermal hot water pump. Final report  

DOE Green Energy (OSTI)

The design, testing and performance capabilities of a Geothermal Hot Water Pumping System being developed are described. The pumping system is intended to operate submerged in geothermal brine wells for extended periods of time. Such a system confines the hot brine in a closed-loop under pressure to prevent the liquid from flashing into steam, in addition to providing a means for reinjecting cooled water and the contaminants into a return well. The system consists of a single-stage centrifugal pump driven by an oil-cooled, high-speed electric motor with integral heat exchanger. For testing purposes a diesel engine driven 400 Hz generator is used for supplying power to the motor. In some areas where commercial power may not be available, the diesel-generator unit or either a rotating or solid state frequency converter may be used to produce the high frequency power required by the motor. Fabrication of a prototype system and testing of the electric motor at frequencies up to 250 Hz was completed. While testing at 275 Hz it was necessary to terminate the testing when the motor stator was damaged as a result of a mechanical failure involving the motor-dynamometer drive adaptor. Test results, although limited, confirm the design and indicate that the performance is as good, or better than predicted. These results also indicate that the motor is capable of achieving rated performance.

Not Available

1977-09-30T23:59:59.000Z

66

Geothermal hot water pump. Final report  

SciTech Connect

The design, testing and performance capabilities of a Geothermal Hot Water Pumping System are described. The pumping system is intended to operate submerged in geothermal brine wells for extended periods of time. Such a system confines the hot brine in a closed-loop under pressure to prevent the liquid from flashing into steam, in addition to providing a means for reinjecting cooled water and the contaminates into a return well. The system consists of a single-stage centrifugal pump driven by an oil-cooled, high-speed electric motor with integral heat exchanger. For testing purposes a diesel engine driven 400 Hz generator is used for supplying power to the motor. In some areas where commercial power may not be available, the diesel-generator unit or either a rotating or solid state frequency converter may be used to produce the high frequency power required by the motor. Fabrication of a prototype system and testing of the electric motor at frequencies up to 250 Hz was completed. While testing at 275 Hz it was necessary to terminate the testing when the motor stator was damaged as a result of a mechanical failure involving the motor-dynamometer drive adaptor.

1977-09-30T23:59:59.000Z

67

Webinar: ENERGY STAR Hot Water Systems for High Performance Homes  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Star Hot Water Systems for High Performance Homes Star Hot Water Systems for High Performance Homes 1 | Building America Program www.buildingamerica.gov Buildings Technologies Program Date: September 30, 2011 ENERGY STAR ® Hot Water Systems for High Performance Homes Welcome to the Webinar! We will start at 11:00 AM Eastern. There is no call in number. The audio will be sent through your computer speakers. All questions will be submitted via typing. Video of presenters Energy Star Hot Water Systems for High Performance Homes 2 | Building America Program www.buildingamerica.gov Energy Star Hot Water Systems for High Performance Homes 3 | Building America Program www.buildingamerica.gov Building America Program: Introduction Building Technologies Program Energy Star Hot Water Systems for High Performance Homes

68

Hotel in the Bahamas profits from solar hot water system  

SciTech Connect

On Paradise Island, located in the Bahamas, American Energy Technologies Inc. (AET) recently designed and supplied a domestic solar water heating system for the new Comfort Suites Hotel. AET is a Florida manufacturer of solar thermal collectors. The hotel has 150 rooms. Hot water usage entails the laundry facilities and the limited kitchen facilities. Access to hot showers is more of a luxury in some places, but guests at the Comfort Suites Hotel need not be concerned. During the development of the hotel, it was noted that the high heating costs of the propane-fueled hotel boiler were somewhat prohibitive. Propane cost approximately $1.67/gallon, causing the cost of heating water for the hotel to be estimated at over $1,000 per month. To offset the high heating costs, a 49-collector system on a 3200 gallon storage tank was designed into the plans for the new facility. The 49 roof mounted collectors were placed on a direct solar link to the 3200 gallon storage tank. The water is preheated before it gets to the boiler, cutting costs tremendously.

1993-01-01T23:59:59.000Z

69

Simultaneous measurement of the thermal conductivity and thermal diffusivity of unconsolidated materials by the transient hot wire method  

Science Conference Proceedings (OSTI)

This paper describes a new design for the transient hot wire method that can obtain the thermal conductivity and thermal diffusivity of unconsolidated materials. In this method

Greg C. Glatzmaier; W. Fred Ramirez

1985-01-01T23:59:59.000Z

70

Hot New Advances in Water Heating Technology | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

ENERGY.GOV - Hot New Advances in Water Heating Technology April 18, 2013 Here at the Energy Department, we are working with our National Laboratories, private companies and...

71

Thermal Performance of Unvented Attics in Hot-Dry Climates  

DOE Green Energy (OSTI)

As unvented attics become a more common design feature implemented by Building America partners in hot-dry climates of the United States, more attention has been focused on how this approach affects heating and cooling energy consumption. The National Renewable Energy Laboratory (NREL) has conducted field testing and hourly building simulations for several Building America projects to evaluate energy use in vented and unvented attics in hot-dry climates. In summer, testing of the Las Vegas protoype house demonstrated that the thermal performance of an unvented attic is highly dependent on duct leakage.

Hendron, B.; Anderson, R.; Reeves, P.; Hancock, E.

2002-04-01T23:59:59.000Z

72

Optimum hot water temperature for absorption solar cooling  

SciTech Connect

The hot water temperature that maximizes the overall instantaneous efficiency of a solar cooling facility is determined. A modified characteristic equation model is used and applied to single-effect lithium bromide-water absorption chillers. This model is based on the characteristic temperature difference and serves to empirically calculate the performance of real chillers. This paper provides an explicit equation for the optimum temperature of vapor generation, in terms of only the external temperatures of the chiller. The additional data required are the four performance parameters of the chiller and essentially a modified stagnation temperature from the detailed model of the thermal collector operation. This paper presents and discusses the results for small capacity machines for air conditioning of homes and small buildings. The discussion highlights the influence of the relevant parameters. (author)

Lecuona, A.; Ventas, R.; Venegas, M.; Salgado, R. [Dpto. Ingenieria Termica y de Fluidos, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganes, Madrid (Spain); Zacarias, A. [ESIME UPA, IPN, Av. de las Granjas 682, Col. Santa Catarina, 02550, D.F. Mexico (Mexico)

2009-10-15T23:59:59.000Z

73

Water Sampling At Buffalo Valley Hot Springs Area (Laney, 2005) | Open  

Open Energy Info (EERE)

Water Sampling At Buffalo Valley Hot Springs Area Water Sampling At Buffalo Valley Hot Springs Area (Laney, 2005) Exploration Activity Details Location Buffalo Valley Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

74

HEATING OF OIL WELL BY HOT WATER CIRCULATION  

E-Print Network (OSTI)

HEATING OF OIL WELL BY HOT WATER CIRCULATION Mladen Jurak Department of Mathematics University.prnic@ina.hr Abstract When highly viscous oil is produced at low temperatures, large pressure drops will significantly decrease production rate. One of possible solu- tions to this problem is heating of oil well by hot water

Rogina, Mladen

75

Modeling patterns of hot water use in households  

E-Print Network (OSTI)

various usage characteristics associated with electric, gas-Usage: A Review of Published Metered Studies. Prepared for Gasgas, may be an incentive for people with electric water heaters to reduce their hot water usage.

Lutz, James D.; Liu, Xiaomin; McMahon, James E.; Dunham, Camilla; Shown, Leslie J.; McCure, Quandra T.

1996-01-01T23:59:59.000Z

76

Reduce Hot Water Use for Energy Savings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reduce Hot Water Use for Energy Savings Reduce Hot Water Use for Energy Savings Reduce Hot Water Use for Energy Savings June 15, 2012 - 5:51pm Addthis Low-flow fixtures and showerheads can achieve water savings of 25%–60%. | Photo courtesy of ©iStockphoto/DaveBolton. Low-flow fixtures and showerheads can achieve water savings of 25%-60%. | Photo courtesy of ©iStockphoto/DaveBolton. What does this mean for me? Fix leaks, install low-flow fixtures, and purchase an energy-efficient dishwasher and clothes washer to use less hot water and save money. You can lower your water heating costs by using and wasting less hot water in your home. To conserve hot water, you can fix leaks, install low-flow fixtures, and purchase an energy-efficient dishwasher and clothes washer. Fix Leaks You can significantly reduce hot water use by simply repairing leaks in

77

Solar Hot Water Creates Savings for Homeless Shelters | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Hot Water Creates Savings for Homeless Shelters Solar Hot Water Creates Savings for Homeless Shelters Solar Hot Water Creates Savings for Homeless Shelters July 15, 2010 - 12:10pm Addthis Kevin Craft What are the key facts? Recovery Act funds are being used to install solar hot water systems at 5 Phoenix shelters. The systems will save Phoenox 33,452 kWh of energy -- about $4,000 -- annually. The systems will reduce about 40,000 pounds of carbon emissions annually. "This project will save us a huge amount of money," says Paul Williams, House of Refuge Sunnyslope's Executive Director. Williams is referring to a recent partnership between the state of Arizona and House of Refuge Sunnyslope to install solar hot water systems at five Phoenix-area housing sites for homeless men, which will make an immediate difference at the

78

Tool for Generating Realistic Residential Hot Water Event Schedules: Preprint  

SciTech Connect

The installed energy savings for advanced residential hot water systems can depend greatly on detailed occupant use patterns. Quantifying these patterns is essential for analyzing measures such as tankless water heaters, solar hot water systems with demand-side heat exchangers, distribution system improvements, and recirculation loops. This paper describes the development of an advanced spreadsheet tool that can generate a series of year-long hot water event schedules consistent with realistic probability distributions of start time, duration and flow rate variability, clustering, fixture assignment, vacation periods, and seasonality. This paper also presents the application of the hot water event schedules in the context of an integral-collector-storage solar water heating system in a moderate climate.

Hendron, B.; Burch, J.; Barker, G.

2010-08-01T23:59:59.000Z

79

NREL: Learning - Student Resources on Solar Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

Solar Hot Water Solar Hot Water Photo of a school building next to a pond. Roy Lee Walker Elementary School in Texas incorporates many renewable energy design features, including solar hot water heating. The following resources will help you learn more about solar water heating systems. If you are unfamiliar with this technology, see the introduction to solar hot water. Grades 7-12 NREL Educational Resources Educational resources available to students from the National Renewable Energy Laboratory. High School and College Level U.S. Department of Energy's Energy Savers: Solar Water Heaters Features comprehensive basic information and resources. U.S. Department of Energy's Energy Savers: Solar Swimming Pool Heaters Features comprehensive basic information and resources. U.S. Department of Energy Solar Decathlon

80

Light stable isotope study of the Roosevelt Hot Springs thermal area, Southwestern Utah  

DOE Green Energy (OSTI)

The isotopic composition of hydrogen, oxygen, and carbon has been determined for regional cold springs, thermal fluids, and rocks and minerals from the Roosevelt Hot Springs thermal area. The geothermal system has developed within plutonic granitic rocks and amphibolite facies gneiss, relying upon fracture-controlled permeability for the migration of the thermal fluids. Probably originating as meteoric waters in the upper elevations of the Mineral Mountains, the thermal waters sampled in the production wells display an oxygen isotopic shift of at least +1.2. Depletions of delta /sup 18/O in wole rock, K-feldspar, and biotite have a positive correlation with alteration intensity. W/R mass ratios, calculated from the isotopic shifts of rock and water, range up to 3.0 in a producing horizon of one well, although the K-feldspar has experienced only 30% exchange with the thermal waters. While veinlet quartz has equilibrated with the thermal waters, the /sup 18/O values of K-mica clay, an alteration product of plagioclase, mimic the isotopic composition of K-feldspar and whole rock. This suggests that locally small W/R ratios enable plagioclase to influence its alteration products by isotopic exchange.

Rohrs D.T.; Bowman, J.R.

1980-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Recovery of energy from geothermal brine and other hot water sources  

DOE Patents (OSTI)

Process and system for recovery of energy from geothermal brines and other hot water sources, by direct contact heat exchange between the brine or hot water, and an immiscible working fluid, e.g. a hydrocarbon such as isobutane, in a heat exchange column, the brine or hot water therein flowing countercurrent to the flow of the working fluid. The column can be operated at subcritical, critical or above the critical pressure of the working fluid. Preferably, the column is provided with a plurality of sieve plates, and the heat exchange process and column, e.g. with respect to the design of such plates, number of plates employed, spacing between plates, area thereof, column diameter, and the like, are designed to achieve maximum throughput of brine or hot water and reduction in temperature differential at the respective stages or plates between the brine or hot water and the working fluid, and so minimize lost work and maximize efficiency, and minimize scale deposition from hot water containing fluid including salts, such as brine. Maximum throughput approximates minimum cost of electricity which can be produced by conversion of the recovered thermal energy to electrical energy.

Wahl, III, Edward F. (Claremont, CA); Boucher, Frederic B. (San Juan Capistrano, CA)

1981-01-01T23:59:59.000Z

82

Demand Shifting with Thermal Mass in Large Commercial Buildings in a California Hot Climate Zone  

E-Print Network (OSTI)

of Building Thermal Mass to Offset Cooling Loads. ” ASHRAEThe Role of Thermal Mass on the Cooling Load of Buildings.Keywords: Pre-cooling, demand response, thermal mass, hot

Xu, Peng

2010-01-01T23:59:59.000Z

83

Circulo: Saving Energy with Just-In-Time Hot Water Recirculation  

Science Conference Proceedings (OSTI)

The average home in the US flushes 1000's of gallons of water down the drain each year while standing at the fixture and waiting for hot water. Some households use a pump for hot water recirculation (HWR) to ensure that hot water is always immediately ... Keywords: Energy and Water Conservation, Hot Water Recirculation

Andrew Frye, Michel Goraczko, Jie Liu, Anindya Prodhan, Kamin Whitehouse

2013-11-01T23:59:59.000Z

84

City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hot Water Heaters and Photovoltaic Systems Permit Requirements City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements Eligibility Commercial...

85

Domestic Hot Water Consumption in Four Low-Income Apartment Buildings  

NLE Websites -- All DOE Office Websites (Extended Search)

Domestic Hot Water Consumption in Four Low-Income Apartment Buildings Title Domestic Hot Water Consumption in Four Low-Income Apartment Buildings Publication Type Conference...

86

DOE Solar Decathlon: News Blog » Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot Water Hot Water Below you will find Solar Decathlon news from the Hot Water archive, sorted by date. New Contest Data Displays Provide Insight into Competition Scoring Saturday, October 5, 2013 By Solar Decathlon New contest data displays are now available on the U.S. Department of Energy Solar Decathlon website. If you are interested in the real-time performance of each house and want to keep a close eye on the competition, check out the Contests section pages. In the Contests section, the pages for the measured contests (Comfort Zone, Hot Water, Appliances, Home Entertainment, and Energy Balance) explain the contest requirements and provide real-time graphical displays of the accumulated measurements/scores for each team. Roll your cursor over the graphics to see more detailed information about each contest. For example,

87

An Energy Policy Perspective on Solar Hot Water Equipment Mandates  

E-Print Network (OSTI)

An Energy Policy Perspective on Solar Hot Water EquipmentU.S. OIL VULNERABILITY: ENERGY POLICY FOR THE 1980's, DOE/cited as Langston]. ENERGY POLICY tween a new house with

Williams, Stephen F.

1981-01-01T23:59:59.000Z

88

Observations from the field: Solar domestic hot water installation recommendations  

SciTech Connect

The Florida Solar Energy Center (FSEC) was ten years old in 1984. Constant contact has been maintained between the Center and solar businesses selling and installing domestic hot water systems in Florida and throughout the Southern states of the Caribbean. FSEC has thus had the opportunity to visit or discuss thousands of DHW system installations with homeowners and installers. This paper provides an overview of lessons learned and some of the resulting installation recommendations for direct, open-loop domestic hot water systems.

Cromer, C.J.

1985-01-01T23:59:59.000Z

89

Natural radioactivity in geothermal waters, Alhambra Hot Springs and nearby areas, Jefferson County, Montana  

DOE Green Energy (OSTI)

Radioactive hot springs issue from a fault zone in crystalline rock of the Boulder batholith at Alhambra, Jefferson County, in southwestern Montana. The discharge contains high concentrations of radon, and the gross activity and the concentration of radium-226 exceed maximum levels recommended by the Environmental Protection Agency for drinking water. Part of the discharge is diverted for space heating, bathing, and domestic use. The radioactive thermal waters at measured temperatures of about 60/sup 0/C are of the sodium bicarbonate type and saturated with respect to calcium carbonate. Radium-226 in the rock and on fractured surfaces or coprecipitated with calcium carbonate probably is the principal source of radon that is dissolved in the thermal water and discharged with other gases from some wells and springs. Local surface water and shallow ground water are of the calcium bicarbonate type and exhibit low background radioactivity. The temperature, percent sodium, and radioactivity of mixed waters adjacent to the fault zone increase with depth. Samples from most of the major hot springs in southwestern Montana have been analyzed for gross alpha and beta. The high level of radioactivity at Alhambra appears to be related to leaching of radioactive material from fractured siliceous veins by ascending thermal waters, and is not a normal characteristic of hot springs issuing from fractured crystalline rock in Montana.

Leonard, R.B.; Janzer, W.J.

1977-08-01T23:59:59.000Z

90

Solar heating and hot water system installed at St. Louis, Missouri. Final report  

DOE Green Energy (OSTI)

Information is provided on the solar heating and hot water system installed at the William Tao and Associates, Inc., office building in St. Louis, Missouri. The information consists of description, photos, maintenance and construction problems, final drawing, system requirements and manufacturer's component data. The solar system was designed to provide 50% of the hot water requirements and 45% of the space heating needs for a 900 square foot office space and drafting room. The solar facility has 252 square foot of glass tube concentrator collectors and a 1000 gallon steel storage tank buried below a concrete slab floor. Freeze protection is provided by a propylene glycol/water mixture in the collector loop. The collectors are roof mounted on a variable tilt array which is adjusted seasonally and is connected to the solar thermal storage tank by a tube-in-shell heat exchanger. Incoming city water is preheated through the solar energy thermal storage tank.

Not Available

1980-04-01T23:59:59.000Z

91

Hot New Advances in Water Heating Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hot New Advances in Water Heating Technology Hot New Advances in Water Heating Technology Hot New Advances in Water Heating Technology April 18, 2013 - 1:15pm Addthis Learn how a cooperative R&D agreement with the Energy Department's Oak Ridge National Laboratory helped contributed to the success of GE's GeoSpring Hybrid Water Heater -- one of the most efficient electric heat pump water heaters on the market today. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Got Energy Efficiency Questions? Our energy efficiency and renewable energy experts will answer your questions about ways to save money and incorporate renewable energy into your home during our Earth Day Google+ Hangout on April 22 at 3 pm ET. Submit your questions on Twitter, G+ and YouTube using #askEnergy,

92

Hot New Advances in Water Heating Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hot New Advances in Water Heating Technology Hot New Advances in Water Heating Technology Hot New Advances in Water Heating Technology April 18, 2013 - 1:15pm Addthis Learn how a cooperative R&D agreement with the Energy Department's Oak Ridge National Laboratory helped contributed to the success of GE's GeoSpring Hybrid Water Heater -- one of the most efficient electric heat pump water heaters on the market today. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Got Energy Efficiency Questions? Our energy efficiency and renewable energy experts will answer your questions about ways to save money and incorporate renewable energy into your home during our Earth Day Google+ Hangout on April 22 at 3 pm ET. Submit your questions on Twitter, G+ and YouTube using #askEnergy,

93

Commonwealth Solar Hot Water Residential Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commonwealth Solar Hot Water Residential Program Commonwealth Solar Hot Water Residential Program Commonwealth Solar Hot Water Residential Program < Back Eligibility Multi-Family Residential Residential Savings Category Heating & Cooling Commercial Heating & Cooling Solar Heating Water Heating Maximum Rebate $3,500 per building or 25% of total installed costs Program Info Funding Source Massachusetts Renewable Energy Trust Fund Start Date 02/07/2011 Expiration Date 12/31/2016 State Massachusetts Program Type State Rebate Program Rebate Amount Base rate: $45 X SRCC rating in thousands btu/panel/day (Category D, Mildly Cloudy Day) Additional $200/system for systems with parts manufactured in Massachusetts Additional $1,500/system for metering installation Adder for natural disaster relief of twice the base rebate.

94

NV Energy (Northern Nevada) - Solar Hot Water Incentive Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NV Energy (Northern Nevada) - Solar Hot Water Incentive Program NV Energy (Northern Nevada) - Solar Hot Water Incentive Program NV Energy (Northern Nevada) - Solar Hot Water Incentive Program < Back Eligibility Commercial Fed. Government Local Government Nonprofit Residential Schools State Government Savings Category Heating & Cooling Solar Water Heating Maximum Rebate Residential electric customers: Lesser of 50% or $2,000 Residential gas customers: Lesser of 30% or $3,000 Small commercial gas customers: Lesser of 30% or $7,500 Nonprofits, schools and other public gas customers: Lesser of 50% or $30,000 Program Info Start Date 2/1/2011 State Nevada Program Type Utility Rebate Program Rebate Amount Residential electric customers: Lesser of 50% or $2,000 Residential gas customers: $14.50 per therm Small commercial gas customers: $14.50 per therm

95

Modeling patterns of hot water use in households  

Science Conference Proceedings (OSTI)

This report presents a detailed model of hot water use patterns in individual household. The model improves upon an existing model by including the effects of four conditions that were previously unaccounted for: the absence of a clothes washer; the absence of a dishwasher; a household consisting of seniors only; and a household that does not pay for its own hot water use. Although these four conditions can significantly affect residential hot water use, and have been noted in other studies, this is the first time that they have been incorporated into a detailed model. This model allows detailed evaluation of the impact of potential efficiency standards for water heaters and other market transformation policies. 21 refs., 3 figs., 10 tabs.

Lutz, J.D.; Liu, Xiaomin; McMahon, J.E. [and others

1996-11-01T23:59:59.000Z

96

Modeling patterns of hot water use in households  

SciTech Connect

This report presents a detailed model of hot water use patterns in individual households. The model improves upon an existing model by including the effects of four conditions that were previously unaccounted for: the absence of a clothes washer; the absence of a dishwasher; a household consisting of seniors only; and a household that does not pay for its own hot water use. Although these four conditions can significantly affect residential hot water use, and have been noted in other studies, this is the first time that they have been incorporated into a detailed model. This model allows detailed evaluation of the impact of potential efficiency standards for water heaters and other market transformation policies.

Lutz, James D.; Liu, Xiaomin; McMahon, James E.; Dunham, Camilla; Shown, Leslie J.; McCure, Quandra T.

1996-01-01T23:59:59.000Z

97

Commonwealth Solar Hot Water Commercial Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commonwealth Solar Hot Water Commercial Program Commonwealth Solar Hot Water Commercial Program Commonwealth Solar Hot Water Commercial Program < Back Eligibility Agricultural Commercial Fed. Government Industrial Local Government Multi-Family Residential Nonprofit Schools State Government Tribal Government Savings Category Heating & Cooling Solar Water Heating Maximum Rebate Feasibility study: $5,000; Construction: 25% system costs or $50,000 Program Info Funding Source Massachusetts Renewable Energy Trust Fund Start Date 08/04/2011 State Massachusetts Program Type State Rebate Program Rebate Amount Feasibility study: $5,000; Construction grants: $45*number of collectors*SRCC Rating (Private); $55*number of collectors*SRCC Rating (Public/Non-Profit) Massachusetts Manufactured adder: $200-$500 Metering adder: Up to $1,500

98

A model of the domestic hot water load  

SciTech Connect

The electrical load required to supply domestic hot water is an important load for two reasons: (1) It represents a large portion (30 to 50%) of the domestic load; (2) It is a load which can easily be controlled by the consumer or the supplier, because the use of the hot water need not coincide with the heating of hot water. A model representing the electrical system load due to hot water consumption from storage water heaters is provided. Variable parameters include the average amount of water used, the mean and deviation of distributions of usage times, thermostat settings, inlet water temperature and electrical heating element ratings. These parameters are used to estimate the after diversity electricity demand profile, and were verified for accuracy by comparison with measurements. The model enables this prediction of the effects of load control, examples of which are given in this paper. The model is also useful for evaluation of the response which could be expected from demand-side management options. These include changing the size of heating elements, reduction in water consumption and reduction in thermostat settings.

Lane, I.E. [Energy Efficiency Enterprises, Lynnwood Manor (South Africa); Beute, N. [Cape Technikon, Cape Town (South Africa)

1996-11-01T23:59:59.000Z

99

Solar Hot Water for Your Home  

DOE Green Energy (OSTI)

A brochure describing the cost-saving and energy-saving benefits of using solar heated water in your home.

American Solar Energy Society

2001-06-19T23:59:59.000Z

100

Magnetotelluric models of the Roosevelt Hot Springs thermal area, Utah  

DOE Green Energy (OSTI)

The Roosevelt Hot Springs (RHS) thermal area, which includes a hotwater-dominated fracture zone prospect, near the eastern margin of the Basin-Range tectonic province, conceivably possesses a whole family of resistivity structures that includes the following: deep hot brine reservoirs, deep-seated partially molten heat sources in the crust or upper mantle that drive the convective system, near-surface hydrothermal alteration zones, wet sedimentary fill in valleys, and a regional, apparently one-dimensional resistivity profile of the crust and upper mantle. This complex resistivity makeup, particular to RHS but probably similar to that at other geothermal areas in the Great Basin, must be treated as being fully three-dimensional (3-D). In an attempt to understand these structures, broadband (10/sup -3/ to 10/sup -2/ Hz) tensor magnetotelluric (MT) data were obtained including apparent resistivities (rho/sub a/), impedance phases (phi) and vertical magnetic field transfer functions for 93 sites in the vicinity of this resource area.

Wannamaker, P.E.; Ward, S.H.; Hohmann, G.W.; Sill, W.R.

1980-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Chemical and isotopic data for water from thermal springs and wells of Oregon  

DOE Green Energy (OSTI)

The thermal springs of Oregon range in composition from dilute NaHCO/sub 3/ waters to moderately saline CO/sub 2/-charged NaCl-NaHCO/sub 3/ waters. Most of the thermal springs are located in southeastern or southcentral Oregon, with a few in northeastern Oregon and near the contact of the Western Cascades with the High Cascades. Thermal springs in the central and northern parts of the Cascades generally issue moderately saline NaCl waters. Farther south in the Cascades, the thermal waters are high in CO/sub 2/ as well as chloride. Most thermal springs in northeastern Oregon issue dilute NaHCO/sub 3/ waters of high pH (>8.5). These waters are similar to the thermal waters which issue from the Idaho batholith, farther east. Most of the remaining thermal waters are Na mixed-anion waters. Based on the chemical geothermometers, Mickey Srpings, Hot Borax Lake, Alvord Hot Springs, Neal Hot Springs, Vale Hot Springs, Crump Well, Hunters (Lakeview) Hot Springs, and perhaps some of the springs in the Cascades are associated with the highest temperature systems (>150/sup 0/C).

Mariner, R.H.; Swanson, J.R.; Orris, G.J.; Presser, T.S.; Evans, W.C.

1981-01-01T23:59:59.000Z

102

Commonwealth Solar Hot Water Residential Program | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating Water Heating Maximum Rebate 3,500 per building or 25% of total installed costs Program Information Funding Source Massachusetts Renewable Energy Trust Fund Start Date...

103

Residential hot water distribution systems: Roundtable session  

E-Print Network (OSTI)

include: combustion and standby losses from water heaters,System Efficiency Losses Standby Loss Combustion LossBecause of their very low standby losses they can achieve

Lutz, James D.; Klein, Gary; Springer, David; Howard, Bion D.

2002-01-01T23:59:59.000Z

104

DOE Solar Decathlon: News Blog » Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

'Hot Water' 'Hot Water' New Contest Data Displays Provide Insight into Competition Scoring Saturday, October 5, 2013 By Solar Decathlon New contest data displays are now available on the U.S. Department of Energy Solar Decathlon website. If you are interested in the real-time performance of each house and want to keep a close eye on the competition, check out the Contests section pages. In the Contests section, the pages for the measured contests (Comfort Zone, Hot Water, Appliances, Home Entertainment, and Energy Balance) explain the contest requirements and provide real-time graphical displays of the accumulated measurements/scores for each team. Roll your cursor over the graphics to see more detailed information about each contest. For example, in the Appliances Contest graphic, the scores for running the refrigerator,

105

Catalytic Behavior of Dense Hot Water  

DOE Green Energy (OSTI)

Water is known to exhibit fascinating physical properties at high pressures and temperatures. Its remarkable structural and phase complexity suggest the possibility of exotic chemical reactivity under extreme conditions, though this remains largely unstudied. Detonations of high explosives containing oxygen and hydrogen produce water at thousands of K and tens of GPa, similar to conditions of giant planetary interiors. These systems thus provide a unique means to elucidate the chemistry of 'extreme water'. Here we show that water plays an unexpected role in catalyzing complex explosive reactions - contrary to the current view that it is simply a stable detonation product. Using first-principles atomistic simulations of the detonation of high explosive pentaerythritol tetranitrate (PETN), we discovered that H{sub 2}O (source), H (reducer) and OH (oxidizer) act as a dynamic team that transports oxygen between reaction centers. Our finding suggests that water may catalyze reactions in other explosives and in planetary interiors.

Wu, C J; Fried, L E; Yang, L H; Goldman, N; Bastea, S

2008-06-05T23:59:59.000Z

106

Solar hot water system installed at Anderson, South Carolina  

DOE Green Energy (OSTI)

The solar energy hot water system installed in the Days Inns of America, Inc., at Anderson, South Carolina is described. The building is a low-rise two-story 114-room motel. The solar components were partly funded by the Department of Energy. The solar system was designed to provide 40% of the total hot water demand. The collector is a flat plate, liquid with an area of 750 square feet. Operation of this system was begun in November 1977, and has performed flawlessly for one year.

Not Available

1978-12-01T23:59:59.000Z

107

CPS Energy- Solar Hot Water Rebate Program  

Energy.gov (U.S. Department of Energy (DOE))

As part of a larger program designed to reduce electricity demand within its service territory, CPS Energy now offers rebates for solar water heaters to its customers. In general, any CPS Energy...

108

Commonwealth Solar Hot Water Residential Program (Massachusetts...  

Open Energy Info (EERE)

Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New Pages Recent Changes All...

109

Commonwealth Solar Hot Water Commercial Program (Massachusetts...  

Open Energy Info (EERE)

Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New Pages Recent Changes All...

110

Waste heat from kitchen cuts hot water electricity 23%  

SciTech Connect

Heat recovered from the Hamburger Hamlet's kitchen in Bethesada, Maryland and used to pre-heat the million gallons of hot water used annually reduced hot water costs 23% and paid off the investment in 1.5 years. Potomac Electric initiated the installation of an air-to-water heat pump in the restaurant kitchen above the dishwasher at a cost of about $5300, with the restaurant obliged to reimburse the utility if performance was satisfactory. Outside water recirculates through storage tanks and the ceiling heat pump until it reaches the required 140/sup 0/F. The amount of electricity needed to bring the preheated water to that temperature was $3770 lower after the installation. Cooled air exhausted from the heat pump circulates throughout the kitchen.

Barber, J.

1984-05-21T23:59:59.000Z

111

New hot-water use data for commercial buildings  

Science Conference Proceedings (OSTI)

This article reports that researchers have found that hot water usage in certain commercial buildings may be significantly higher than designers expect. ASHRAE Technical Committee 6.6, Service Water Heating, recognized the need for a comprehensive compilation and evaluation of available hot water usage information in residential and commercial installations. The bulk of the commercial building hot water demand and sizing information presented in Chapter 44 of the 1991 ASHRAE Handbook--HVAC Application is based on a comprehensive study published in 1969. However, information received by members of TC 6.6 and data appearing in some of the current literature suggest that the Handbook values may be too conservative. Because of conflicting information in the literature and possible variations in lifestyles and use patterns since the Handbook values were originally published, ASHRAE sponsored research project RP-600 to study and review these issues. In this research project, domestic hot water consumption was monitored at five separate commercial buildings in four building category types: one nursing home, two dormitories (one coed and one women's), one full-service restaurant and one hotel.

Thrasher, W.H.; DeWerth, D.W. (American Gas Association Lab., Cleveland, OH (United States))

1994-09-01T23:59:59.000Z

112

Estimating Energy and Water Losses in Residential Hot Water Distribution Systems  

E-Print Network (OSTI)

For dishwashers, not only is energy wasted as the hot waterhas the energy used to heat this water been wasted, but thewasted heat as water cools down in the distribution system after a draw; and the energy

Lutz, James

2005-01-01T23:59:59.000Z

113

Estimating Energy and Water Losses in Residential Hot WaterDistribution Systems  

DOE Green Energy (OSTI)

Residential single family building practice currently ignores the losses of energy and water caused by the poor design of hot water systems. These losses include; the waste of water while waiting for hot water to get to the point of use; the wasted heat as water cools down in the distribution system after a draw; and the energy needed to reheat water that was already heated once before. Average losses of water are estimated to be 6.35 gallons (24.0 L) per day. (This is water that is rundown the drain without being used while waiting for hot water.) The amount of wasted hot water has been calculated to be 10.9 gallons (41.3L) per day. (This is water that was heated, but either is not used or issued after it has cooled off.) A check on the reasonableness of this estimate is made by showing that total residential hot water use averages about 52.6 gallons (199 L) per day. This indicates about 20 percent of average daily hot water is wasted.

Lutz, James

2005-02-26T23:59:59.000Z

114

Large scale solar hot water heating systems for green hospital  

Science Conference Proceedings (OSTI)

Concerns over the impact of the environment on the massive usage of fossil fuels, combined with soaring energy prices, triggered increased interest in the use of solar energy. Solar energy is abundant, provides an important saving to the consumer, and ... Keywords: energy savings, evacuated tubes, greenhouse gas reduction, solar assisted hot water heaters

Poorya Ooshaksaraei; Baharudin Ali; Sohif Mat; M. Yahya; Kamaruzaman Ibrahim; Azami Zaharim; Kamaruzaman Sopian

2010-01-01T23:59:59.000Z

115

Design and installation package for solar hot water system  

DOE Green Energy (OSTI)

This report contains the design and installation procedure for the Solar Engineering and Manufacturing Company's solar hot water system. Included are the system performance specifications, system design drawings, hazard analysis and other information necessary to evaluate the design and instal the system.

Not Available

1978-12-01T23:59:59.000Z

116

Ocala Utility Services - Solar Hot Water Heating Rebate Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

You are here You are here Home » Ocala Utility Services - Solar Hot Water Heating Rebate Program Ocala Utility Services - Solar Hot Water Heating Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate One rebate per account Program Info State Florida Program Type Utility Rebate Program Rebate Amount $450 per system Provider Ocala Utility Services The Solar Water Heater Rebate Program is offered to residential retail electric customers by the City of Ocala Utility Services. Interested customers must complete an application and receive approval from the Ocala Utility Services before installing equipment. The application can be found on the [http://www.ocalafl.org/COO3.aspx?id=947 program web site.] The system must be installed by a licensed Florida contractor on the customer's

117

Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell,  

Open Energy Info (EERE)

Hot Creek Ranch Area (Benoit & Blackwell, Hot Creek Ranch Area (Benoit & Blackwell, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Exploration Activity Details Location Upper Hot Creek Ranch Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not useful DOE-funding Unknown Notes Ten temperature gradient holes up to 500' deep were initially planned but higher than anticipated drilling and permitting costs within a fixed budget reduced the number of holes to five. Four of the five holes drilled to depths of 300 to 400' encountered temperatures close to the expected regional thermal background conditions. These four holes failed to find any evidence of a large thermal anomaly surrounding the UHCR hot springs. The

118

Our Environment in Hot Water: Comparing Water Heaters, A Life Cycle Approach Comparing Tank and Tankless Water Heaters in California  

E-Print Network (OSTI)

hot water draw and energy usage for household samples,Support Document [10]. Energy usage for tankless watersuch a large population, energy usage would be reduced and

Lu, Alison

2011-01-01T23:59:59.000Z

119

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network (OSTI)

solar thermal systems, which can be used for domestic hot water, space heatingsolar thermal systems, which can be used for domestic hot water, space heating

Marnay, Chris

2010-01-01T23:59:59.000Z

120

A Realistic Hot Water Draw Specification for Rating Solar Water...  

NLE Websites -- All DOE Office Websites (Extended Search)

thornton@tess-inc.com ABSTRACT In the United States, annual performance ratings for solar water heaters are simulated, using TMY weather and specified water draw. Bias...

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico November 3, 2010 - 10:00am Addthis Stephen Graff Former...

122

Evaluation of Residential Hot Water Distribution Ssytems by Numeric Simulation  

SciTech Connect

The objective of this project was to evaluate the performance and economics of various domestic hot water distribution systems in representative California residences. While the greatest opportunities for improved efficiency occur in new construction, significant improvements can also be made in some existing distribution systems. Specific objectives of the project tasks were: (1) Simulate potential energy savings of, perform cost-benefit analyses of, and identify market barriers to alternative new systems. (2) Simulate potential energy savings of, perform cost-benefit analyses of, and identify market barriers to maintenance, repair, and retrofit modifications of existing systems. (3) Evaluate potential impact of adopting alternative hot water distribution systems and report project findings. The outcome of this project is to provide homeowners, homebuilders, systems suppliers, municipal code officials and utility providers (both electric and water/sewer) with a neutral, independent, third party, cost-benefit analysis of alternative hot water distribution systems for use in California. The results will enable these stakeholders to make informed decisions regarding which system is most appropriate for use.

Wendt, ROBERT

2005-08-17T23:59:59.000Z

123

Direct Use for Building Heat and Hot Water Presentation Slides and Text Version  

Energy.gov (U.S. Department of Energy (DOE))

Download presentation slides from the DOE Office of Indian Energy webinar on direct use for building heat and hot water.

124

Model for Thermal Behavior of Shaded Photovoltaic Cells under Hot-Spot Condition  

Science Conference Proceedings (OSTI)

We address the problem of modeling the thermal behavior of photovoltaic (PV) cells that, due to their being exposed to shading, may experience a dramatic temperature increase (a phenomenon referred to as hot-spot) with consequent reduction of the provided ... Keywords: solar cell, hot-spot heating, energy efficiency, reliability

Daniele Giaffreda; Martin Omana; Daniele Rossi; Cecilia Metra

2011-10-01T23:59:59.000Z

125

Water Heating: Energy-efficient strategies for supplying hot water in the home (BTS Technology Fact Sheet)  

SciTech Connect

Fact sheet for homeowners and contractors on how to supply hot water in the home while saving energy.

NAHB Research Center; Southface Energy Institute; U.S. Department of Energy' s Oak Ridge Laboratory; U.S. Department of Energy' s National Renewable Energy Laboratory

2001-08-15T23:59:59.000Z

126

Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) Exploration Activity Details Location Crump's Hot Springs Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes 8 wells References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Gradient_Holes_At_Crump%27s_Hot_Springs_Area_(DOE_GTP)&oldid=402699"

127

Overheating in Hot Water- and Steam-Heated Multifamily Buildings  

Science Conference Proceedings (OSTI)

Apartment temperature data have been collected from the archives of companies that provide energy management systems (EMS) to multifamily buildings in the Northeast U.S. The data have been analyzed from more than 100 apartments in eighteen buildings where EMS systems were already installed to quantify the degree of overheating. This research attempts to answer the question, 'What is the magnitude of apartment overheating in multifamily buildings with central hot water or steam heat?' This report provides valuable information to researchers, utility program managers and building owners interested in controlling heating energy waste and improving resident comfort. Apartment temperature data were analyzed for deviation from a 70 degrees F desired setpoint and for variation by heating system type, apartment floor level and ambient conditions. The data shows that overheating is significant in these multifamily buildings with both hot water and steam heating systems.

Dentz, J.; Varshney, K.; Henderson, H.

2013-10-01T23:59:59.000Z

128

Controllers for solar domestic hot-water systems  

SciTech Connect

This document is intended as a resource for designers and installers of solar domestic hot water systems. It provides key functional control strategy and equipment alternatives and equipment descriptions adequate for writing effective DHW controller specifications. It also provides the installer with adequate technical background to understand the functional aspects of the controller. Included are specific instructions to install, check out, and troubleshoot the controller installation.

1981-10-01T23:59:59.000Z

129

Solar domestic hot water system inspection and performance evaluation handbook  

DOE Green Energy (OSTI)

A reference source and procedures are provided to a solar technician for inspecting a solar domestic hot water system after installation and for troubleshooting the system during a maintenance call. It covers six generic DHW systems and is designed to aid the user in identifying a system type, diagnosing a system's problem, and then pinpointing and evaluating specific component problems. A large amount of system design and installation information is also included.

Not Available

1981-10-01T23:59:59.000Z

130

Heating of Oil Well by Hot Water Circulation  

E-Print Network (OSTI)

When highly viscous oil is produced at low temperatures, large pressure drops will significantly decrease production rate. One of possible solutions to this problem is heating of oil well by hot water recycling. We construct and analyze a mathematical model of oil-well heating composed of three linear parabolic PDE coupled with one Volterra integral equation. Further on we construct numerical method for the model and present some simulation results.

Mladen Jurak; Zarko Prnic

2005-03-04T23:59:59.000Z

131

Hydrothermal alteration at the Roosevelt Hot Springs Thermal Area, Utah. Final report  

DOE Green Energy (OSTI)

Hot spring deposits in the Roosevelt thermal area consist of opaline sinter, and siliceous-sinter-cemented alluvium. Alluvium, granite to granodiorite plutonic rocks, and amphibolite facies gneiss have been altered by acid-sulfate water to alunite and opal at the surface, and to kaolinite, alunite, montmorillonite, and muscovite to a depth of 60 m. Marcasite and pyrite occur below the water table at about 30m. Deeper alteration sampled to a depth of 2.26 km consists of muscovite, chlorite, calcite, K-feldspar, albite, and epidote with pyrite and sparse chalcopyrite. Thermal water is dilute (ionic strength 0.1 to 0.2) sodium chloride brine. Surface water contains 10 times as much calcium and 100 times as much magnesium as the deep water. Sulfate varies from 48 to 200 mg/l. Present-day spring temperature is 25/sup 0/C but in 1950 the spring temperature was 85/sup 0/C. Computed Na-K-Ca temperature is 241/sup 0/C for the present-day spring, 274/sup 0/C for a well and 283/sup 0/C for the 1957 spring. Quartz saturation temperatures are 170/sup 0/C for the present-day spring, 283/sup 0/C for the well, and 213/sup 0/C for the 1957 spring. A plausible model for development of the near-surface alteration consists of hydrothermal fluid which convectively rises along major fractures. Water cools by conduction and steam separation, and hydrogen ion is produced by oxidation of hydrogen sulfide. The low pH water percolates from the surface downward and reacts with rocks to produce alunite, kaolinite, montmorillonite, and muscovite as hydrogen is consumed.

Parry, W.T.; Bryant, N.L.; Dedolph, R.E.; Ballantyne, J.M.; Ballantyne, G.H.; Rohrs, D.T.; Mason, J.L.

1978-11-01T23:59:59.000Z

132

Chemical and isotopic composition of water from thermal and mineral springs of Washington  

DOE Green Energy (OSTI)

Waters from the thermal springs of Washington range in chemical composition from dilute Na-HCO/sub 3/ to moderately saline CO/sub 2/-charged Na-HCO/sub 3/-Cl type waters. St. Martin's Hot Spring which discharges a slightly saline Na-Cl water, is the notable exception. The dilute Na-HCO/sub 3/ waters are generally associated with granitic intrusions; the warm to hot CO/sub 2/-charged waters issue on or near the large stratovolcanoes. The dilute waters have oxygen-isotopic compositions that indicate relatively little water-rock exchange. The CO/sub 2/-charged waters are usually more enriched in oxygen-18 due to more extensive water-rock reaction. The carbon-13 in the CO/sub 2/-charged thermal waters is more depleted (-10 to -12 %) than in the cold CO/sub 2/-charged soda springs (-2 to -8%) which are also scattered throughout the Cascades. The hot and cold CO/sub 2/-charged waters are supersaturated with respect to CaCO/sub 3/, but only the hot springs are actively depositing CaCO/sub 3/. Baker, Gamma, Sulphur, and Ohanapecosh hot springs seem to be associated with thermal aquifers of more than 100/sup 0/C. As these springs occur as individual springs or in small clusters, the respective aquifers are probably of restricted size.

Mariner, R.H.; Presser, T.S.; Evans, W.C.

1982-02-01T23:59:59.000Z

133

Solar Water Heating: What's Hot and What's Not  

E-Print Network (OSTI)

A handful of electric utilities in the United States now pay incentives to their customers to install solar water heaters or are developing programs to do so. The solar water heater incentives are part of a broader utility demand-side management program designed to reduce system demand during peak summer hours. Solar hot water has the potential to generate significant savings during periods of high solar intensity. For summer peaking utilities, these periods of high solar intensity coincide with the overall system peak. This paper discusses the basics of analyzing solar water heaters as a demand-side management measure. In addition, four utility solar water heater incentive programs are studied in detail. The paper describes each program and notes the stage of development. Where such information is available, incentive amounts and cost-effectiveness calculations are included.

Stein, J.

1992-05-01T23:59:59.000Z

134

Solar heating and hot water system installed at Listerhill, Alabama  

DOE Green Energy (OSTI)

The solar system was installed into a new buildng and was designed to provide 79% of the estimated annual space heating load and 59% of the estimated annual potable hot water requirement. The collectors are flat plate, liquid manufactured by Reynolds Metals Company and cover a total area of 2344 square feet. The storage medium is water inhibited with NALCO 2755 and the container is an underground, unpressurized steel tank with a capacity of 5000 gallons. This final report describes in considerable detail the solar heating facility and contains detailed drawings of the completed system.

Not Available

1978-12-01T23:59:59.000Z

135

Thermal Waters of Nevada | Open Energy Information  

Open Energy Info (EERE)

Thermal Waters of Nevada Thermal Waters of Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Thermal Waters of Nevada Abstract Abstract unavailable. Authors Larry J. Garside and John H. Schilling Organization Nevada Bureau of Mines and Geology Published Nevada Bureau of Mines and Geology, 1979 Report Number Bulletin 91 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Thermal Waters of Nevada Citation Larry J. Garside,John H. Schilling (Nevada Bureau of Mines and Geology). 1979. Thermal Waters of Nevada. Reno, NV: Nevada Bureau of Mines and Geology. Report No.: Bulletin 91. Retrieved from "http://en.openei.org/w/index.php?title=Thermal_Waters_of_Nevada&oldid=690515" Categories: References Geothermal References

136

Measurement of the Equivalent Thermal Resistance of Rooftop Lawns in a Hot-Climate Wind Tunnel  

E-Print Network (OSTI)

In a very hot summer equivalent to a Guangzhou summer, the reduction of heat coming into rooms is very important with respect to thermal comfort and energy efficiency. The objective of this study is to investigate the evaporation cooling effect on a rooftop lawn. A hot-climate wind tunnel experiment was carried out in order to obtain and analyze the heat and moisture transport in the rooftop lawn. Furthermore, a calculation with the energy conservation equation was carried out using the results of the hot-climate wind tunnel experiment. The calculated equivalent thermal resistance and synthesis exterior surface heat transfer coefficient were in fairly good agreement with that in the design standard for energy efficiency of residential buildings in the hot summer and warm winter zone, while the average velocity in hot-climate wind tunnel equals the summer average outdoor velocity in Guangzhou.

Meng, Q.; Zhang, Y.; Zhang, L.

2006-01-01T23:59:59.000Z

137

Integrated solar heating, cooling and hot water system for the San Diego City Schools, University City High School (Engineering Materials)  

DOE Green Energy (OSTI)

The solar system consists of a heating circuit, two 200-ton absorption chiller hot water circuits and a hot water tube bundle circuit combined with solar collection and storage loops into a single integrated thermal system. Gas fired boilers provide backup and load peaking. Solar collection is provided by three types of panels located on a south facing hill from top to bottom are as follows: parabolic tracking concentrating reflectors, 7680 ft/sup 2/; parabolic fixed concentrating reflectors, 7364 ft/sup 2/; and fresnel lens concentrating, tracking, 2488 ft/sup 2/. The storage capacity is 88,800 gallons in 3 steel tanks. Reference DOE/CS/31499-T2.

Not Available

138

Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area,  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Trace Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Abstract Chemical interaction of thermal brines with reservoir rock in the Roosevelt Hot Springs thermal area has resulted in the development of distinctive trace element signatures. Geochemical analysis of soil sample, shallow temperature gradient drill hole cuttings and deep drill hole cutting provides a three dimensional perspective of trace element distributions within the system. Distributions of As, Hg and Li provide the clearest expression of hydrothermal activity. Comparison of these distribution

139

DOE Office of Indian Energy Foundational Course on Direct Use for Building Heat and Hot Water  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DIRECT USE FOR BUILDING HEAT & HOT WATER Presented by the National Renewable Energy Laboratory Course Outline 2 What we will cover...  About the DOE Office of Indian Energy Education Initiative  Course Introduction  Solar Thermal and Solar Ventilation Air Pre-Heat - Resources, Technology, Examples & Cost, and References  Biomass Heat - Resources, Technology, Examples & Cost, and References  Geothermal Building Heat - Resources, Technology, Examples & Cost, and References  Additional Information & Resources Introduction The U.S. Department of Energy (DOE) Office of Indian Energy Policy and Programs is responsible for assisting Tribes with energy planning and development, infrastructure, energy costs, and electrification of Indian

140

Solar hot water systems for the southeastern United States: principles and construction of breadbox water heaters  

DOE Green Energy (OSTI)

The use of solar energy to provide hot water is among the easier solar technologies for homeowners to utilize. In the Southeastern United States, because of the mild climate and abundant sunshine, solar energy can be harnessed to provide a household's hot water needs during the non-freezing weather period mid-April and mid-October. This workbook contains detailed plans for building breadbox solar water heaters that can provide up to 65% of your hot water needs during warm weather. If fuel costs continue to rise, the annual savings obtained from a solar water heater will grow dramatically. The designs in this workbook use readily available materials and the construction costs are low. Although these designs may not be as efficient as some commercially available systems, most of a household's hot water needs can be met with them. The description of the breadbox water heater and other types of solar systems will help you make an informed decision between constructing a solar water heater or purchasing one. This workbook is intended for use in the southeastern United States and the designs may not be suitable for use in colder climates.

None

1983-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Pumped Solar Domestic Hot Water (SDHW) system design guidelines  

SciTech Connect

This article provides practical guidelines based on experience gained from the design, installation, and commissioning of a pumped Solar Domestic Hot Water (SDHW) system in Saudi Arabia. The authors believe that such information is not readily available and will be useful to designers and installers of SDHW systems within the region. Since the current motivation for buying SDHW systems in Saudi Arabia is not strictly economic, it is imperative that a professional reference be available, against which the soundness of any technical decisions could be confirmed prior to their implementation. The intent is to ensure that systems designed and installed will operate reliably, therefore enhancing customer satisfaction.

Arshad, K.; Said, S.A.M. (King Fahd Univ. of Petroleum Minerals, Dhahran (Saudi Arabia))

1989-01-01T23:59:59.000Z

142

Residential hot water usage: A review of published metered studies. Topical report, August-December 1994  

SciTech Connect

The report presents a review of residential hot water usage studies. The studies included were published and publicly available, they measured actual hot water usage or energy usage, and they had sufficient demographic information to determine the number of people per household. The available hot water usage data were normalized to a 135 F setpoint temperature to eliminate the variations in usage caused by different water heater thermostat settings. Typical hot water usage as a function of family size was determined from linear regression analyses of the normalized metered studies` data points. A national average hot water usage of 53 gallons per day was determined from the regression analyses and census data on average household size. The review of metered studies also shows that there is no discernible difference in hot water usage for households with either electric or gas water heaters.

Paul, D.D.; Ide, B.E.; Hartford, P.A.

1994-12-01T23:59:59.000Z

143

Regulation of thermal conductivity in hot galaxy clusters by MHD turbulence  

E-Print Network (OSTI)

The role of thermal conduction in regulating the thermal behavior of cooling flows in galaxy clusters is reexamined. Recent investigations have shown that the anisotropic Coulomb heat flux caused by a magnetic field in a dilute plasma drives a dynamical instability. A long standing problem of cooling flow theory has been to understand how thermal conduction can offset radiative core losses without completely preventing them. In this Letter we propose that magnetohydrodynamic turbulence driven by the heat flux instability regulates field-line insulation and drives a reverse convective thermal flux, both of which may mediate the stabilization of the cooling cores of hot clusters. This model suggests that turbulent mixing should accompany strong thermal gradients in cooling flows. This prediction seems to be supported by the spatial distribution of metals in the central galaxies of clusters, which shows a much stronger correlation with the ambient hot gas temperature gradient than with the parent stellar population.

Steven A. Balbus; Christopher S. Reynolds

2008-06-05T23:59:59.000Z

144

Realistic Hot Water Draw Specification for Rating Solar Water Heaters: Preprint  

DOE Green Energy (OSTI)

In the United States, annual performance ratings for solar water heaters are simulated, using TMY weather and specified water draw. A more-realistic ratings draw is proposed that eliminates most bias by improving mains inlet temperature and by specifying realistic hot water use. This paper outlines the current and the proposed draws and estimates typical ratings changes from draw specification changes for typical systems in four cities.

Burch, J.

2012-06-01T23:59:59.000Z

145

A comparison of two heat transfer models for estimating thermal drawdown in Hot Dry Rock reservoirs  

DOE Green Energy (OSTI)

Estimates of thermal drawdown in Hot Dry Rock geothermal systems have been made with two different models of heat transfer from hydraulically fractured reservoir rock blocks to water circulated through the fracture permeability. One model is based on deconvolution of experimental tracer response curves into a network of flowpaths connected in parallel with heat transfer calculated individually in each flowpath. The second model is based on one-dimensional flow through the rock with a block size distribution described as a group of equivalent-radius spheres for which the heat transfer equations can be solved analytically. The two-models were applied to the planned Phase II long-term thermal drawdown experiment at Fenton Hill, NM. The results show good agreement between the two models, with estimates of temperature cooldown from 240/sup 0/C to 150/sup 0/C in a few years depending on selected operation parameters, but with somewhat differing cooldown curve characteristic shapes. Data from the long-term experiment will be helpful in improving the two models.

Robinson, B.A.; Kruger, P.

1988-01-01T23:59:59.000Z

146

Enhanced heat extraction from hot-dry-rock geothermal reservoirs due to interacting secondary thermal cracks. Final report  

DOE Green Energy (OSTI)

How the fluid circulating through the main hydraulic fracture and the thermally-induced secondary, growing, interacting cracks affects the time-varying temperature, deformations, stresses, thermal crack geometry, water flow rates through the main and thermal cracks, reservoir coolant outlet temperature, and reservoir thermal power of the cracked geothermal reservoir is investigated. First, a simplified version of the proposed hot-dry-rock reservoir is considered. A closed-form solution of the rock temperature without thermal crack was found and substituted into SAP-IV computer code to calculate the stresses. These stresses being superposed with earth stresses and fluid pressure were used in conjunction with the fracture mechanics criterion to determine the initiation of secondary thermal crack. After the initiation of secondary thermal crack, the rock temperature was then calculated by a two-dimensional heat conduction program AYER. The detailed procedures for carrying out these steps are listed. Solutions developed are applied to studying the time-varying temperature field, thermal stresses and crack geometry produced, and additional heat power generated in the reservoir. Conclusions were discussed and summarized. (MHR)

Hsu, Y.C.

1979-04-01T23:59:59.000Z

147

Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al.,  

Open Energy Info (EERE)

2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al., 2004) Exploration Activity Details Location Lake City Hot Springs Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness not indicated DOE-funding Unknown Notes The Lake City site, which is located in far northeastern California, consists of a previously identified geothermal site that has been explored with both geophysics and drilling (Hedel, 1981), but has not been characterized adequately to allow accurate siting or drilling of production wells. Some deep wells, several seismic lines, limited gravity surveys, and geochemical and geological studies have suggested that the geothermal

148

Solar process heat technology in action: The process hot water system at the California Correctional Institution at Tehachapi  

DOE Green Energy (OSTI)

Solar process heat technology relates to solar thermal energy systems for industry, commerce, and government. Applications include water preheating and heating, steam generation, process hot air, ventilation air heating, and refrigeration. Solar process heat systems are available for commercial use. At the present time, however, they are economically viable only in niche markets. This paper describes a functioning system in one such market. The California Department of Corrections (CDOC), which operates correctional facilities for the state of California, uses a solar system for providing hot water and space heating at the California Correctional Institute at Tehachapi (CCI/Tehachapi). CCI/Tehachapi is a 5100-inmate facility. The CDOC does not own the solar system. Rather, it buys energy from private investors who own the solar system located on CCI/Tehachapi property; this arrangement is part of a long-term energy purchase agreement. United Solar Technologies (UST) of Olympia Washington is the system operator. The solar system, which began operating in the fall of 1990, utilizes 2677 m{sup 2} (28,800 ft{sup 2}) of parabolic through solar concentrators. Thermal energy collected by the system is used to generate hot water for showers, kitchen operations, and laundry functions. Thermal energy collected by the system is also used for space heating. At peak operating conditions, the system is designed to meet approximately 80 percent of the summer thermal load. 4 figs., 4 tabs.

Hewett, R. [National Renewable Energy Lab., Golden, CO (United States); Gee, R.; May, K. [Industrial Solar Technology, Arvada, CO (United States)

1991-12-01T23:59:59.000Z

149

Water and Energy Wasted During Residential Shower Events: Findings from a Pilot Field Study of Hot Water Distribution Systems  

E-Print Network (OSTI)

study to determine waste of water and energy in residential30 percent. The average waste of energy in the hot water ispaper examines the waste of water and energy associated with

Lutz, Jim

2012-01-01T23:59:59.000Z

150

SELF-SIMILAR STRUCTURE OF A HOT MAGNETIZED FLOW WITH THERMAL CONDUCTION  

Science Conference Proceedings (OSTI)

We have explored the structure of a hot magnetized accretion flow with thermal conduction. The importance of thermal conduction in hot accretion flows has been confirmed by observations of the hot gas surrounding Sgr A* and a few other nearby galactic nuclei. For a steady state structure of such accretion flows, a set of self-similar solutions is presented. In this paper, we have actually tried to re-check the solution presented by Abbassi et al. using a physical constraint. In this study, we find that Equation (29) places a new constraint that limits answers presented by Abbassi et al. In that paper, the parameter space, which is established in the new constraint, was plotted. However, the new requirement makes up only a small parameter space with physically acceptable solutions. And now in this paper, we have followed the idea with more effort and tried to find out how thermal conduction influences the structure of the disks in a physical parameter space. We have found that the existence of thermal conduction will lead to the reduction of accretion and radial and azimuthal velocities as well as the vertical thickness of the disk, which is slightly reduced. Moreover, the surface density of the disk will increase when thermal conduction becomes important in hot magnetized flow.

Ghasemnezhad, M.; Khajavi, M. [Department of Physics, School of Sciences, Ferdowsi University of Mashhad, Mashhad, 91775-1436 (Iran, Islamic Republic of); Abbassi, S., E-mail: abbassi@ipm.ir [School of Physics, Damghan University, P.O. Box 36715-364, Damghan (Iran, Islamic Republic of)

2012-05-01T23:59:59.000Z

151

Direct uses of hot water (geothermal) in dairying  

DOE Green Energy (OSTI)

Digital computer simulation was used to investigate the peak, steady energy utilization of a geothermal energy-supported dairy. A digital computer program was also written to assess the lifetime economics of the dairy operation. A dynamic simulation program was written to design water storage tanks under diurnal transient loading. The geothermal site specified is the artesian spring named Hobo Wells near Susanville, California. The dairy configuration studies are unique, but consist of conventional processing equipment. In the dairy, cattle waste would be used to generate methane and carbon dioxide by anaerobic digestion. Some carbon dioxide would be removed from the gas stream with a pressurized water scrubber to raise the heating value. The product gas would be combusted in a spark ignition engine connected to an electric generator. The electrical power produced would be used for operation of fans, pumps, lights and other equipment in the dairy. An absorption chiller using a geothermal water driven generator would provide milk chilling. Space heating would be done with forced air hot water unit heaters.

Barmettler, E.R.; Rose, W.R. Jr.

1978-01-01T23:59:59.000Z

152

Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field...  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ...

153

Feasibility study and roadmap to improve residential hot water distribution systems  

DOE Green Energy (OSTI)

Residential building practice currently ignores the losses of energy and water caused by the poor design of hot water systems. These losses include: the waste of water while waiting for hot water to get to the point of use; the wasted heat as water cools down in the distribution system after a draw; and the energy to reheat water that was already heated once before. A feasibility study and an action plan for a proposed research project involving residential hot water distribution systems is being developed. The feasibility study will use past work to estimate of hot water and energy loses caused by current hot water distribution systems in residences. Proposed research project, or roadmap, will develop recommendations for improvements to residential hot water distribution systems. The roadmap addresses the technical obstacles and gaps in our knowledge that prevent water and energy reductions and market adoption of water- and energy-efficient technologies. The initial results of the feasibility study are presented here along with a discussion of a roadmap to improve the efficiency of residential hot water distribution systems.

Lutz, James D.

2004-03-31T23:59:59.000Z

154

EERE Roofus' Solar and Efficient Home: Solar Hot Water  

NLE Websites -- All DOE Office Websites (Extended Search)

of Roofus, a golden retriever, sitting in front of three black, rectangular solar collectors. Sunshine is really hot, and it makes my roof get hot, too So I use a...

155

Affordable Solar Hot Water and Power LLC | Open Energy Information  

Open Energy Info (EERE)

Water and Power LLC Water and Power LLC Jump to: navigation, search Name Affordable Solar Hot Water and Power LLC Place Dothan, Alabama Zip 36305 Sector Solar Product Solar and Energy Efficiency for buildings and homes Year founded 2006 Number of employees 1-10 Phone number 334-828-1024 Website http://www.asolarpro.com Coordinates 31.2070554°, -85.4994192° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":31.2070554,"lon":-85.4994192,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

156

Promising freeze protection alternatives in solar domestic hot water systems  

DOE Green Energy (OSTI)

Since the gains associated with solar thermal energy technologies are comparatively small in relation to the required capital investment, it is vital to maximize conversion efficiency. While providing the necessary function of freeze protection, the heat exchanger commonly included in solar domestic water heating systems represents a system inefficiency. This thesis explores two alternate methods of providing freeze protection without resorting to a heat exchanger. Commonly, collectors are made of rigid copper tubes separated by copper or aluminum fins. Cracking damage can occur when water is allowed to freeze and expand inside the non compliant tubes. The possibility of making collectors out of an elastic material was investigated and shown to be effective. Since unlike copper, elastomers typically have low thermal conductivities, the standard collector performance prediction equations do not apply. Modified thermal performance prediction equations were developed which can be used for both low and high thermal conductivity materials to provide accurate predictions within a limited range of plate geometries. An elastomeric collector plate was then designed and shown to have comparable performance to a copper plate collector whose aperture area is approximately 33% smaller. Another options for providing freeze protection to an SDHW system is to turn it off during the winter. Choosing a three-season operating period means two things. First, the system will have different optimums such as slope and collector area. Second, the wintertime solar energy incident on the collector is unavailable for meeting a heating load. However, the system`s heat exchanger becomes unnecessary and removing it increases the amount of energy that arrives at the storage tank during those periods in which the system is operating.

Bradley, D.E.

1997-12-31T23:59:59.000Z

157

Prototype solar heating and cooling systems including potable hot water. Quarterly reports  

DOE Green Energy (OSTI)

The activities conducted by Solaron Corporation from November 1977 through September 1978 are summarized and the progress made in the development, delivery and support of two prototype solar heating and cooling systems including potable hot water is covered. The system consists of the following subsystems: solar collector, auxiliary heating, potable hot water, storage, control, transport, and government-furnished site data acquisition.

Williamson, R.

1978-10-01T23:59:59.000Z

158

Prototype solar heating and cooling systems including potable hot water. Quarterly reports, November 1976--June 1977  

DOE Green Energy (OSTI)

This report covers the progress made in the development, delivery and support of two prototype solar heating and cooling systems including potable hot water. The system consists of the following subsystems: collector, auxiliary heating, potable hot water, storage, control, transport, and government-furnished site data acquisition.

Not Available

1978-12-01T23:59:59.000Z

159

Development of Standardized Domestic Hot Water Event Schedules for Residential Buildings  

SciTech Connect

The Building America Research Benchmark is a standard house definition created as a point of reference for tracking progress toward multi-year energy savings targets. As part of its development, the National Renewable Energy Laboratory has established a set of domestic hot water events to be used in conjunction with sub-hourly analysis of advanced hot water systems.

Hendron, R.; Burch, J.

2008-08-01T23:59:59.000Z

160

Active space heating and hot water supply with solar energy  

DOE Green Energy (OSTI)

Technical and economic assessments are given of solar water heaters, both circulating, and of air-based and liquid-based solar space heating systems. Both new and retrofit systems are considered. The technical status of flat-plate and evacuated tube collectors and of thermal storage is also covered. Non-technical factors are also briefly discussed, including the participants in the use of solar heat, incentives and deterrents. Policy implications are considered as regards acceleration of solar use, goals for solar use, means for achieving goals, and interaction of governments, suppliers, and users. Government actions are recommended. (LEW)

Karaki, S.; Loef, G. O.G.

1981-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Applications of Commercial Heat Pump Water Heaters in Hot, Humid Climates  

E-Print Network (OSTI)

Heat pump water heaters can provide high-efficiency water heating and supplemental space cooling and dehumidification in commercial buildings throughout the United States. They are particularly attractive in hot, humid areas where cooling loads are high and the cooling season is long. Because commercial kitchens and laundry facilities have simultaneous water heating and cooling needs, they are excellent applications for heat pump water heaters. Typical heat pump water heaters (HPWHs) operate at an annual coefficient of performance (COP) of approximately 3.0 for water heating alone. Space conditioning benefits of about 0.67 Btu are delivered at no additional cost for each Btu of water heating output. In situations in which this cooling output is valued, the dual thermal outputs for heating and cooling make heat pump water heaters particularly attractive. The comfort value of added cooling in overheated facilities and the resulting increase in employee and customer satisfaction are frequently cited as additional benefits. This paper describes currently available heat pump water heating equipment and offers guidelines for successful applications in commercial facilities. The results of field test programs involving more than 100 units in Alabama, Georgia, Mississippi, Tennessee, South Carolina, and other areas are incorporated. Initial conclusions are drawn from a reliability database, and interviews with utility applications specialists and manufacturers are discussed. Design tools are reviewed, including a new comprehensive computer simulation model. Emphasis is placed on identifying sound candidates for installations and on application and design considerations. A brief survey is provided of environmental implications of heat pump water heaters and new developments in heat pump water heater equipment.

Johnson, K. F.; Shedd, A. C.

1992-05-01T23:59:59.000Z

162

Practical Solar Thermal Chilled Water  

E-Print Network (OSTI)

With the pressing need for the United States to reduce our dependence upon fossil fuels, it has become a national priority to develop technologies that allow practical use of renewable energy sources. One such energy source is sunlight. It has the potential to impact America's use of non-renewable energy beyond its own design capacity by applying it to the optimization of an existing building's system. Solar-thermal chilling systems are not new. However, few of them can be described as a practical success. The primary reason for these disappointments is a misunderstanding of solar energy dynamics by air conditioning designers; combined with a similar misunderstanding by solar engineers of how thermally driven chillers react to the loads and energy sources applied to them. With this in mind, a modeling tool has been developed which provides the flexibility to apply a strategy which can be termed, Optimization by Design.

Leavell, B.

2010-01-01T23:59:59.000Z

163

Thermal Performance of Exposed Composed Roofs in Very Hot Dry Desert Region in Egypt (Toshky)  

E-Print Network (OSTI)

Thermal performance for any building in hot dry region depend on the external climatic factor, the ability of the construction materials used in gained heat through day time and loss this heat through night time through the nocturnal radiation. Roof is considered the major part of the building envelop which exposed to high thermal load due to the high solar intensity and high outdoor air temperature through summer season which reach to 6 months. In Egypt the thermal effect of roof is increased as one go towards from north to south. This study evaluate the thermal performance of different test rooms with different roofs construction; uninsulated concrete, insulated concrete, double, plant, and active concrete roofs, constructed under the effect of external climatic condition of very hot and dry region in Egypt (Toshky region). The external climatic conditions and the temperature distribution inside the roof construction and the indoor air temperature were measured. The results of this study recognized that the thermal transmittance (UValue) has a major role in chosen the constructed materials. Also the thermal insulation considered the suitable manner for damping the thermal stresses through day time and makes the interior environment of the building near the comfort zone during most months of the year. Natural night and forced ventilation are more important in improving the internal conditions. The construction roof systems show that the indoor air temperature thermal damping reach to 96%, 90%, 89%, and 76% for insulated concrete, double, planted and uninsulated concrete roofs. The results also investigate the importance of using the earth as a cooling source through the active concrete system. Evaporative cooling and movable shading which are an integrated part of the guidelines for building design in hot dry region must be using.

Khalil, M. H.; Sheble, S.; Morsey, M. S.; Fakhry, S.

2010-01-01T23:59:59.000Z

164

Validation of a Hot Water Distribution Model Using Laboratory and Field Data  

SciTech Connect

Characterizing the performance of hot water distribution systems is a critical step in developing best practice guidelines for the design and installation of high performance hot water systems. Developing and validating simulation models is critical to this effort, as well as collecting accurate input data to drive the models. In this project, the ARBI team validated the newly developed TRNSYS Type 604 pipe model against both detailed laboratory and field distribution system performance data. Validation efforts indicate that the model performs very well in handling different pipe materials, insulation cases, and varying hot water load conditions. Limitations of the model include the complexity of setting up the input file and long simulation run times. In addition to completing validation activities, this project looked at recent field hot water studies to better understand use patterns and potential behavioral changes as homeowners convert from conventional storage water heaters to gas tankless units. Based on these datasets, we conclude that the current Energy Factor test procedure overestimates typical use and underestimates the number of hot water draws. This has implications for both equipment and distribution system performance. Gas tankless water heaters were found to impact how people use hot water, but the data does not necessarily suggest an increase in usage. Further study in hot water usage and patterns is needed to better define these characteristics in different climates and home vintages.

Backman, C.; Hoeschele, M.

2013-07-01T23:59:59.000Z

165

Hot Corrosion of Shipboard Turbine Components in High Water ...  

Science Conference Proceedings (OSTI)

While the resulting degradation for the two types of hot corrosion has been well documented for traditional fuel ... Hardware Materials in Carbonate Fuel Cell.

166

An investigation of photovoltaic powered pumps in direct solar domestic hot water systems  

DOE Green Energy (OSTI)

The performance of photovoltaic powered pumps in direct solar domestic hot water (PV-SDHW) systems has been studied. The direct PV- SDHW system employs a photovoltaic array, a separately excited DC- motor, a centrifugal pump, a thermal collector, and a storage tank. A search methodology for an optimum PV-SDHW system configuration has been proposed. A comparison is made between the long-term performance of a PV-SDHW system and a conventional SDHW system operating under three control schemes. The three schemes are: an ON-OFF flow controlled SDHW system operating at the manufacturer-recommended constant flow rate, and a linear proportional flow controlled SDHW system with the flow proportional to the solar radiation operating under an optimum proportionality. 13 refs., 6 figs.

Al-Ibrahim, A.M.; Klein, S.A.; Mitchell, J.W.; Beckman, W.A.

1996-09-01T23:59:59.000Z

167

LWRS Fuels Pathway: Engineering Design and Fuels Pathway Initial Testing of the Hot Water Corrosion System  

Science Conference Proceedings (OSTI)

The Advanced LWR Nuclear Fuel Development R&D pathway performs strategic research focused on cladding designs leading to improved reactor core economics and safety margins. The research performed is to demonstrate the nuclear fuel technology advancements while satisfying safety and regulatory limits. These goals are met through rigorous testing and analysis. The nuclear fuel technology developed will assist in moving existing nuclear fuel technology to an improved level that would not be practical by industry acting independently. Strategic mission goals are to improve the scientific knowledge basis for understanding and predicting fundamental nuclear fuel and cladding performance in nuclear power plants, and to apply this information in the development of high-performance, high burn-up fuels. These will result in improved safety, cladding, integrity, and nuclear fuel cycle economics. To achieve these goals various methods for non-irradiated characterization testing of advanced cladding systems are needed. One such new test system is the Hot Water Corrosion System (HWCS) designed to develop new data for cladding performance assessment and material behavior under simulated off-normal reactor conditions. The HWCS is capable of exposing prototype rodlets to heated, high velocity water at elevated pressure for long periods of time (days, weeks, months). Water chemistry (dissolved oxygen, conductivity and pH) is continuously monitored. In addition, internal rodlet heaters inserted into cladding tubes are used to evaluate repeated thermal stressing and heat transfer characteristics of the prototype rodlets. In summary, the HWCS provides rapid ex-reactor evaluation of cladding designs in normal (flowing hot water) and off-normal (induced cladding stress), enabling engineering and manufacturing improvements to cladding designs before initiation of the more expensive and time consuming in-reactor irradiation testing.

Dr. John Garnier; Dr. Kevin McHugh

2012-09-01T23:59:59.000Z

168

Case Study of Stratified Chilled Water Storage Utilization for Comfort and Process Cooling in a Hot, Humid Climate  

E-Print Network (OSTI)

The advantages of thermal storage are enhanced in hot and humid climates. Year-round cooling loads increase thermal storage operating cost savings. The absence of a long winter during which major maintenance tasks can be accomplished without compromising system reliability increases the importance of thermal storage as back-up capacity. In an industrial setting, operating cost savings due to thermal storage go directly to the bottom line of a manufacturing process and the avoidance of lost production due to process cooling outages can save millions of dollars per year. This paper presents a case study of chilled water storage use at the campus of a major US electronics manufacturer located in Dallas, TX. An overview of the system and its operation is followed by presentation of operating data taken during 1997.

Bahnfleth, W. P.; Musser, A.

1998-01-01T23:59:59.000Z

169

Water geochemistry and hydrogeology of the shallow aquifer at Roosevelt Hot Springs, southern Utah: A hot dry rock prospect  

DOE Green Energy (OSTI)

On the western edge of the geothermal field, three deep holes have been drilled that are very hot but mostly dry. Two of them (Phillips 9-1 and Acord 1-26 wells) have been studied by Los Alamos National Laboratory for the Hot Dry Rock (HDR) resources evaluation program. A review of data and recommendations have been formulated to evaluate the HDR geothermal potential at Roosevelt. The present report is directed toward the study of the shallow aquifer of the Milford Valley to determine if the local groundwater would be suitable for use as make-up water in an HDR system. This investigation is the result of a cooperative agreement between Los Alamos and Phillips Petroleum Co., formerly the main operator of the Roosevelt Hot Springs Unit. The presence of these hot dry wells and the similar setting of the Roosevelt area to the prototype HDR site at Fenton Hill, New Mexico, make Roosevelt a very good candidate site for creation of another HDR geothermal system. This investigation has two main objectives: to assess the water geochemistry of the valley aquifer, to determine possible problems in future make-up water use, such as scaling or corrosion in the wells and surface piping, and to assess the hydrogeology of the shallow groundwaters above the HDR zone, to characterize the physical properties of the aquifer. These two objectives are linked by the fact that the valley aquifer is naturally contaminated by geothermal fluids leaking out of the hydrothermal reservoir. In an arid region where good-quality fresh water is needed for public water supply and irrigation, nonpotable waters would be ideal for an industrial use such as injection into an HDR energy extraction system. 50 refs., 10 figs., 10 tabs.

Vuataz, F.D.; Goff, F.

1987-12-01T23:59:59.000Z

170

Hot Water Draw Patterns in Single-Family Houses: Findings from Field  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot Water Draw Patterns in Single-Family Houses: Findings from Field Hot Water Draw Patterns in Single-Family Houses: Findings from Field Studies Title Hot Water Draw Patterns in Single-Family Houses: Findings from Field Studies Publication Type Report LBNL Report Number LBNL-4830E Year of Publication 2011 Authors Lutz, James D., Renaldi, Alexander B. Lekov, Yining Qin, and Moya Melody Document Number LBNL-4830E Pagination 26 Date Published 05/2011 Publisher Lawrence Berkeley National Laboratory City Berkeley Abstract This report describes data regarding hot water draw patterns that Lawrence Berkeley National Laboratory obtained from 10 studies. The report describes our purposes in collecting the data; the ways in which we managed, cleaned, and analyzed the data; and the results of our data analysis. We found that daily hot water use is highly variable both among residences and within the same residence. We also found that the distributions of daily hot water use are not symmetrical normal distributions. Thus we used median, not average, values to characterize typical daily hot water use. This report presents summary information that illustrates the results of our data collection and some initial analysis.

171

Waters of Hot Springs National Park, Arkansas: their nature and origin  

DOE Green Energy (OSTI)

The 47 hot springs of Hot Springs National Park, Arkansas, issue from the plunging crestline of a large overturned anticline, along the southern margin of the Ouachita anticlinorium, in the Zigzag Mountains. The combined flow of the hot springs ranges from 750,000 to 950,000 gallons per day (3.29 x 10/sup -2/ to 4.16 x 10/sup -2/ cubic meters per second). The radioactivity and chemical composition of the hot-water springs are similar to that of the cold-water springs and wells in the area. The tritium and carbon-14 analyses of the water indicate that the water is a mixture of a very small amount of water less than 20 years old and a preponderance of water about 4400 years old. The presence of radium and radon in the hot-springs waters has been established by analyses. Mathematical models were employed to test various conceptual models of the hot-springs flow system. The geochemical data, flow measurements, and geologic structure of the region support the concept that virtually all the hot-springs water is of local, meteoric origin. Recharge to the hot-springs artesian-flow system is by infiltration of rainfall in the outcrop areas of the Bigfork Chert and the Arkansas Novaculite. The water moves slowly to depth where it is heated by contact with rocks of high temperature. Highly permeable zones, related to jointing or faulting, collect the heated water in the aquifer and provide avenues for the water to travel rapidly to the surface.

Bedinger, M.S.; Pearson, F.J. Jr.; Reed, J.E.; Sniegocki, R.T.; Stone, C.G.

1979-01-01T23:59:59.000Z

172

A search for the Mpemba effect: When hot water freezes faster then cold water James D. Brownridge  

E-Print Network (OSTI)

..." and "...Preheating the melt produces no certain effect upon it ..."6 In other words, if a specimen of water voltage produced the when latent heat of freezing is released. (A) Glass tube and water, (B) 500k, (CA search for the Mpemba effect: When hot water freezes faster then cold water James D. Brownridge

Suzuki, Masatsugu

173

DOE Office of Indian Energy Foundational Course on Direct Use for Building Heat and Hot Water  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Direct Use for Building Direct Use for Building Heat and Hot Water Webinar (text version) Below is the text version of the Webinar titled "DOE Office of Indian Energy Foundational Courses Renewable Energy Technologies: Direct Use for Building Heat and Hot Water." Slide 1 Amy Hollander: Hello, I'm Amy Hollander with the National Renewable Energy Laboratory. Welcome to today's webinar on Building Heat and Hot Water sponsored by the U.S. Department of Energy Office of Indian Energy Policy and Programs. This webinar is being recorded from DOE's National Renewable Energy Laboratory's new state-of-the-art net zero

174

Solar heating and hot water system installed at Shoney's Restaurant, North Little Rock, Arkansas. Final report  

Science Conference Proceedings (OSTI)

The solar heating system is designed to supply a major portion of the space and water heating requirements for a newly built Shoney's Big Boy Restaurant which was installed with completion occurring in December 1979. The restaurant has a floor space of approximately 4,650 square feet and requires approximately 1500 gallons of hot water daily. The solar energy system consists of 1,428 square feet of Chamberlain flat plate liquid collector subsystem, and a 1500 gallon storage subsystem circulating hot water producing 321 x 10/sup 6/ Btu/yr (specified) building heating and hot water heating. Designer - Energy Solutions, Incorporated. Contractor - Stephens Brothers, Incorporated. This report includes extracts from site files, specification references for solar modifications to existing building heating and hot water systems, drawings installation, operation and maintenance instructions.

Not Available

1980-08-01T23:59:59.000Z

175

Final report : testing and evaluation for solar hot water reliability.  

DOE Green Energy (OSTI)

Solar hot water (SHW) systems are being installed by the thousands. Tax credits and utility rebate programs are spurring this burgeoning market. However, the reliability of these systems is virtually unknown. Recent work by Sandia National Laboratories (SNL) has shown that few data exist to quantify the mean time to failure of these systems. However, there is keen interest in developing new techniques to measure SHW reliability, particularly among utilities that use ratepayer money to pay the rebates. This document reports on an effort to develop and test new, simplified techniques to directly measure the state of health of fielded SHW systems. One approach was developed by the National Renewable Energy Laboratory (NREL) and is based on the idea that the performance of the solar storage tank can reliably indicate the operational status of the SHW systems. Another approach, developed by the University of New Mexico (UNM), uses adaptive resonance theory, a type of neural network, to detect and predict failures. This method uses the same sensors that are normally used to control the SHW system. The NREL method uses two additional temperature sensors on the solar tank. The theories, development, application, and testing of both methods are described in the report. Testing was performed on the SHW Reliability Testbed at UNM, a highly instrumented SHW system developed jointly by SNL and UNM. The two methods were tested against a number of simulated failures. The results show that both methods show promise for inclusion in conventional SHW controllers, giving them advanced capability in detecting and predicting component failures.

Caudell, Thomas P. (University of New Mexico, Albuquerque, NM); He, Hongbo (University of New Mexico, Albuquerque, NM); Menicucci, David F. (Building Specialists, Inc., Albuquerque, NM); Mammoli, Andrea A. (University of New Mexico, Albuquerque, NM); Burch, Jay (National Renewable Energy Laboratory, Golden CO)

2011-07-01T23:59:59.000Z

176

Geothermal: Sponsored by OSTI -- Residential hot water distribution...  

Office of Scientific and Technical Information (OSTI)

Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search About Publications Advanced Search New Hot Docs News Related Links You are...

177

Thermal Waters Along The Konocti Bay Fault Zone, Lake County...  

Open Energy Info (EERE)

Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Thermal...

178

Estimating market penetration of steam, hot water and chilled water in commercial sector using a new econometric model  

SciTech Connect

For the first time in the public domain, we have estimated the energy consumption and expenditures of district steam, hot water, and chilled water. Specifically, the combined energy consumption and expenditures of steam, hot water, and chilled water in 1989 were approximately 800 trillion Btu and 7 billion dollars, respectively. The purpose of this paper is to introduce a new model developed at Argonne National Laboratory (ANL) for estimating market penetration of steam, hot water, and chilled water systems in commercial buildings over the next 20 years. This research sponsored by the US Department of Energy (DOE) used the 1989 Commercial Building Energy Consumption Surveys (CBECS) to provide information on energy consumption and expenditures and related factors in about 6000 buildings. A general linear model to estimated parameters for each of the three equations for steam, hot water, and chilled water demand in the buildings. A logarithmic transformation was made for the dependent variable and most of the explanatory variables. The model provides estimates of building steam, hot water, and chilled water consumption and expenditures between now and the year 2010. This model should be of interest to policymakers, researchers, and market participants involved with planning and implementing community-based energy-conserving and environmentally beneficial energy systems.

Teotia, A.P.S.; Karvelas, D.E.; Daniels, E.J.; Anderson, J.L.

1993-08-01T23:59:59.000Z

179

Solar Hot Water Technology: Office of Power Technologies (OPT) Success Stories Series Fact Sheet  

NLE Websites -- All DOE Office Websites (Extended Search)

Buildings Program Buildings Program Office of Solar Energy Technologies Every home, commercial building, and indus- trial facility requires hot water. An enormous amount of energy is consumed in the United States producing and maintaining our supply of on-demand hot water; the residential and commercial sectors combined use 3 quads (quadrillion Btus) of energy per year, roughly 3% of the total U.S. energy consumption. As of 1998, 1.2 million systems have been installed on homes in the United States, with 6000 currently being added each year. Yet the potential for growth is huge, as solar hot water systems are supplying less than 2% of the nation's hot water. For industrial applications, the growth potential lies in large-scale systems, using flat-plate and trough-type collectors which are being installed in increasing numbers in

180

Tribal Renewable Energy Foundational Course: Direct Use for Building Heat and Hot Water  

Energy.gov (U.S. Department of Energy (DOE))

Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar on direct use for building heat and hot water by clicking on the .swf link below. You can also download the...

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Geothermal investigations in Idaho. Part 3. An evaluation of thermal water in the Weiser area, Idaho  

DOE Green Energy (OSTI)

The Weiser area encompasses about 200 square miles in southwest Idaho and contains two thermal water areas: (1) the Crane Creek subarea, which is 12 miles east of Weiser, Idaho, and (2) the Weiser Hot Springs subarea, which is 5 miles northwest of Weiser. Volcanic and sedimentary rocks of Miocene to Pleistocene age have been faulted and folded to form the northwest-trending anticlines present in much of the area. Basalt of the Columbia River Group or underlying rocks are believed to constitute the reservoir for the hot water. Gravity and magnetic anomalies are present in both subareas. A preliminary audio-magnetotelluric survey indicates that a shallow conductive zone is associated with each thermal site. Above-normal ground temperatures measured at a depth of 1 metre below the land surface in the Weiser Hot Springs subarea correlate with relatively high concentrations of boron in underlying ground waters, which, in turn, are usually associated with thermal waters in the study area. Sampled thermal waters are of a sodium chloride sulfate or sodium sulfate type, having dissolved-solids concentrations that range from 225 to 1,140 milligrams per litre. Temperatures of sampled waters ranged from 13/sup 0/ to 92.0/sup 0/C. Minimum aquifer temperatures calculated from chemical analysis of water, using geochemical thermometers, were 170/sup 0/ and 150/sup 0/C in the Crane Creek and Weiser Hot Springs subareas, respectively. Estimated maximum temperatures ranged from 212/sup 0/ to 270/sup 0/C and 200/sup 0/ to 242/sup 0/C, respectively, in these subareas. The probable heat sources for both subareas are (1) young magmatic intrusive rocks underlying the basalt or (2) above-normal temperatures resulting from thinning of the earth's crust. Maps are included.

Young, H.W.; Whitehead, R.L.

1974-01-01T23:59:59.000Z

182

Water Sampling At Hot Lake Area (Wood, 2002) | Open Energy Information  

Open Energy Info (EERE)

Hot Lake Area (Wood, 2002) Hot Lake Area (Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Hot Lake Area (Wood, 2002) Exploration Activity Details Location Hot Lake Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the

183

Water Sampling At Crane Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Hot Springs Area (Wood, 2002) Hot Springs Area (Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Crane Hot Springs Area (Wood, 2002) Exploration Activity Details Location Crane Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the

184

Water Sampling At Mccredie Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Mccredie Hot Springs Area (Wood, 2002) Mccredie Hot Springs Area (Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Mccredie Hot Springs Area (Wood, 2002) Exploration Activity Details Location Mccredie Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the

185

Installation package for a domestic solar heating and hot water system  

DOE Green Energy (OSTI)

Fern Engineering Company, Inc. has developed two prototype solar heating and hot water systems. The systems have been installed at Tunkhannock, Pennsylvania, and Lansing, Michigan. The system consists of the following subsystems: solar collector, storage, control, transport, and auxiliary energy. General guidelines which may be utilized in development of detailed installation plans and specifications are presented. In addition, instruction on operation, maintenance, and repair of a solar heating and hot water system is provided.

Not Available

1978-08-01T23:59:59.000Z

186

Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico Tapping Solar for Hot Water and Cheaper Bills for Puerto Rico November 3, 2010 - 10:00am Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? 150 new jobs. 1200 solar water heaters installed. In Puerto Rico, solar water heaters have been popular for decades. But even with energy savings, not everyone can afford one. Through a new Recovery Act-funded program for the island, more families are showering with water heated by the sun. The U.S. Department of Energy's new Weatherization Assistance Program (WAP) in Puerto Rico has made it a priority to install the systems in homes of income-eligible residents, as part of its weatherization assistance services. The Puerto Rico Energy Affairs Administration (PREAA), which

187

Thermal Degradation of Amines in Supercritical Water  

Science Conference Proceedings (OSTI)

The purity and chemical control of water and steam are essential for ensuring fossil plant availability and reliability. An assessment of amines to address specific corrosion control issues (Electric Power Research Institute [EPRI] report 1017475) identified eight amines as alternatives to ammonia for pH control. Previous research has limited the thermal degradation of the pH control agents to temperatures less than 300176C. This report presents an understanding of the high-temperature degradation of the...

2010-08-11T23:59:59.000Z

188

The Study on Thermal Performance and Applicability of Energy-saving Wall Materials in Hot Summer and Cold Winter Zones  

E-Print Network (OSTI)

The hot summer and cold winter zone is a transition zone between the cold zone and hot zone, sweltering in summer and chilly in winter, of which climate is worse. In recent years, with people's raised requirements on indoor living environments, the energy consumption of buildings in hot summer and cold winter zone has been greatly increased. However, the thermal performance of walls in this zone is worse, and thus a mass of energy is wasted. This paper thoroughly analyzes and compares some energy-saving wall materials and thermal insulation systems used in projects in general, according to the climate in the zone combined with the design standard for the walls of residential buildings in the hot summer and cold winter zone. The results indicate that reasonably selecting the applicable wall materials and thermal insulation systems according to the local energy consumption characteristics could optimize resource utilization and have a positive effect on energy efficiency.

Ren, W.; Lan, M.; Hao, Y.

2006-01-01T23:59:59.000Z

189

Water Sampling At Alvord Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Water Sampling At Alvord Hot Springs Area (Wood, Water Sampling At Alvord Hot Springs Area (Wood, 2002) Exploration Activity Details Location Alvord Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from

190

Water Sampling At Beowawe Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Water Sampling At Beowawe Hot Springs Area (Wood, Water Sampling At Beowawe Hot Springs Area (Wood, 2002) Exploration Activity Details Location Beowawe Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from

191

Thermal and lighting performance of toplighting systems in the hot and humid climate of Thailand  

E-Print Network (OSTI)

This study evaluated the potential of toplighting systems in the hot and humid tropics by using Bangkok, Thailand (latitude 13.7�°N) as a test location. The analysis tested both the thermal and lighting performance of three toplighting systems. Toplighting, designed for use in one-story buildings or on the top floor of taller buildings, yields a uniformly distributed light throughout a space. However, in lower latitude locations, where there is no heating period, heat gain is a critical design issue since it significantly affects the annual energy consumption of the building. Accordingly, the decision to use toplighting in these locations needs to be carefully examined before any design considerations occur. In this study, the thermal and lighting performance of three toplighting systems were compared. For the thermal performance, total cooling loads, heat gains and losses, and interior temperature were evaluated. The lighting performance parameters examined were daylight factor, illuminance level, light distribution, and uniformity. EnergyPlus was used as the thermal analysis tool, and RADIANCE, along with a physical scale model, was used as the lighting performance analysis tool. The sky conditions tested were overcast, clear sky, and intermediate sky. Results have shown that, for locations with hot and humid climates with variable sky conditions such as Bangkok, Thailand, the roof monitors perform better than the other two systems in terms of the thermal and lighting performance. With similar cooling loads, the roof monitor provides better illuminance uniformity than the skylights and lightscoops, with adequate illuminance level (at mostly higher than 500 lux).

Harntaweewongsa, Siritip

2005-08-01T23:59:59.000Z

192

New Hampshire Electric Co-Op - Solar Hot Water | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

New Hampshire Electric Co-Op - Solar Hot Water New Hampshire Electric Co-Op - Solar Hot Water New Hampshire Electric Co-Op - Solar Hot Water < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $1,500 Program Info State New Hampshire Program Type Utility Rebate Program Rebate Amount 20% of installed costs Provider New Hampshire Electric Co-Op New Hampshire Electric Co-Op (NHEC) offers rebates to residential customers who install qualified solar water-heating systems. The rebate is equal to 20% of installed system costs, with a maximum award of $1,500. Systems must be pre-approved, and installed in NHEC's service territory by a qualified installer. Program funds are available on a first-come, first-served basis. See the program web site listed above for more information, an application

193

Solar heating, cooling and domestic hot water system installed at Columbia Gas System Service Corp. , Columbus, Ohio. Final report  

DOE Green Energy (OSTI)

The Solar Energy System located at the Columbia Gas Corporation, Columbus, Ohio, has 2978 ft/sup 2/ of Honeywell single axis tracking, concentrating collectors and provides solar energy for space heating, space cooling and domestic hot water. A 1,200,000 Btu/h Bryan water-tube gas boiler provides hot water for space heating. Space cooling is provided by a 100 ton Arkla hot water fired absorption chiller. Domestic hot water heating is provided by a 50 gallon natural gas domestic storage water heater. Extracts are included from the site files, specification references, drawings, installation, operation and maintenance instructions.

Not Available

1980-11-01T23:59:59.000Z

194

Solar heating, cooling, and hot water systems installed at Richland, Washington. Final report  

DOE Green Energy (OSTI)

Project Sunburst is a demonstration system for solar space heating and cooling and solar hot water heating for a 14,400 square foot office building in Richland, Washington. The project is part of the US Department of Energy's solar demonstration program, and became operational in April 1978. The solar system uses 6,000 square feet of flat-plate liquid collectors in a closed loop to deliver solar energy through a liquid--liquid heat exchanger to the building heat-pump duct work or 9,000-gallon thermal energy storage tank. A 25-ton Arkla solar-driven absorption chiller provides the cooling, in conjunction with a 2,000 gallon chilled water storage tank and reflective ponds on three sides of the building to reject surplus heat. A near-by building is essentially identical except for having conventional heat-pump heating and cooling, and can serve as an experimental control. An on-going public relations program has been provided from the beginning of the program and has resulted in numerous visitors and tour groups.

Not Available

1979-06-01T23:59:59.000Z

195

Measured electric hot water standby and demand loads from Pacific Northwest homes  

SciTech Connect

The Bonneville Power Administration began the End-Use Load and Consumer Assessment Program (ELCAP) in 1983 to obtain metered hourly end-use consumption data for a large sample of new and existing residential and commercial buildings in the Pacific Northwest. Loads and load shapes from the first 3 years of data fro each of several ELCAP residential studies representing various segments of the housing population have been summarized by Pratt et al. The analysis reported here uses the ELCAP data to investigate in much greater detail the relationship of key occupant and tank characteristics to the consumption of electricity for water heating. The hourly data collected provides opportunities to understand electricity consumption for heating water and to examine assumptions about water heating that are critical to load forecasting and conservation resource assessments. Specific objectives of this analysis are to: (A) determine the current baseline for standby heat losses by determining the standby heat loss of each hot water tank in the sample, (B) examine key assumptions affecting standby heat losses such as hot water temperatures and tank sizes and locations, (C) estimate, where possible, impacts on standby heat losses by conservation measures such as insulating tank wraps, pipe wraps, anticonvection valves or traps, and insulating bottom boards, (D) estimate the EF-factors used by the federal efficiency standards and the nominal R-values of the tanks in the sample, (E) develop estimates of demand for hot water for each home in the sample by subtracting the standby load from the total hot water load, (F) examine the relationship between the ages and number of occupants and the hot water demand, (G) place the standby and demand components of water heating electricity consumption in perspective with the total hot water load and load shape.

Pratt, R.G.; Ross, B.A.

1991-11-01T23:59:59.000Z

196

New Infographic and Projects to Keep Your Energy Bills Out of Hot Water |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Infographic and Projects to Keep Your Energy Bills Out of Hot Infographic and Projects to Keep Your Energy Bills Out of Hot Water New Infographic and Projects to Keep Your Energy Bills Out of Hot Water April 19, 2013 - 3:21pm Addthis New Energy Saver 101 infographic lays out the different types of water heaters on the market and will help you figure out how to select the best model for your home. Download a high-resolution version of the infographic. | Infographic by Sarah Gerrity. New Energy Saver 101 infographic lays out the different types of water heaters on the market and will help you figure out how to select the best model for your home. Download a high-resolution version of the infographic. | Infographic by Sarah Gerrity. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs

197

Solar heating and hot water system installed at Cherry Hill, New Jersey. [Hotels  

DOE Green Energy (OSTI)

The solar heating and hot water system installed in existing buildings at the Cherry Hill Inn in Cherry Hill, New Jersey is described in detail. The system went into operation November 8, 1978 and is expected to furnish 31.5% of the overall heating load and 29.8% of the hot water load. The collectors are General Electric Company liquid evacuated tube type. The storage system is an above ground insulated steel water tank with a capacity of 7,500 gallons.

Not Available

1979-05-16T23:59:59.000Z

198

Feasibility study and roadmap to improve residential hot water distribution systems  

E-Print Network (OSTI)

dishwashers, not only is the energy wasted by the hot waterwasted heat as water cools down in the distribution system after a draw; and the energywasted heat as water cools down in the distribution system after a draw; and the energy

Lutz, James D.

2004-01-01T23:59:59.000Z

199

Our Environment in Hot Water: Comparing Water Heaters, A Life Cycle Approach Comparing Tank and Tankless Water Heaters in California  

SciTech Connect

Residential water heating is a large source of energy use in California homes. This project took a life cycle approach to comparing tank and tankless water heaters in Northern and Southern California. Information about the life cycle phases was calculated using the European Union?s Methodology study for EcoDesign of Energy-using Products (MEEUP) and the National Renewable Energy Laboratory?s Life Cycle Inventory (NREL LCI) database. In a unit-to-unit comparison, it was found that tankless water heaters would lessen impacts of water heating by reducing annual energy use by 2800 MJ/year (16% compared to tank), and reducing global warming emissions by 175 kg CO2 eqv./year (18% reduction). Overall, the production and combustion of natural gas in the use phase had the largest impact. Total waste, VOCs, PAHs, particulate matter, and heavy-metals-to-air categories were also affected relatively strongly by manufacturing processes. It was estimated that tankless water heater users would have to use 10 more gallons of hot water a day (an increased usage of approximately 20%) to have the same impact as tank water heaters. The project results suggest that if a higher percentage of Californians used tankless water heaters, environmental impacts caused by water heating would be smaller.

Lu, Alison; McMahon, James; Masanet, Eric; Lutz, Jim

2008-08-13T23:59:59.000Z

200

Commissioning the Domestic Hot Water System on a Large University Campus: A Case Study  

E-Print Network (OSTI)

The Texas A&M University (TAMU) main campus in College Station consists of 110 buildings with 12.5 million square feet of gross building space. Seventy-one of these buildings are connected to the main campus domestic hot water (DHW) distribution system. The DHW loop is more than 50 years old and has had continuing distribution problems. The main problems reported from several buildings were low hot water temperature and long delays in obtaining hot water at fixtures. The objective of this study was to investigate the causes of these problems and help determine how to best operate the system. It was found that reported problems of low flows, low temperatures and long hot water lag time resulted from reverse flows and no hot water circulation caused by: 1) Unadjusted return pumps with heads too high. 2) Pumps not installed or not running where needed. 3) Pumps with heads too low. 4) Check valves not installed where needed. 5) Insufficient piping capacity in two locations. This paper presents possible control strategies to alleviate these problems identified during the field investigation.

Chen, H.; Bensouda, N.; Claridge, D.; Bruner, H.

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Commercial Solar Hot Water Financing Program | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nonprofit Schools State Government Savings Category Solar Buying & Making Electricity Heating & Cooling Commercial Heating & Cooling Water Heating Program Info State Massachusetts...

202

Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Details Activities (5) Areas (2) Regions (0) Abstract: Two hot dry rock (HDR) geothermal energy reservoirs have been created by hydraulic fracturing of Precambrian granitic rock between two wells on the west flank of the Valles Caldera in the Jemez Mountains of northern New Mexico. Heat is extracted by injecting water into one well,

203

Why Is Nevada in Hot Water? Structural Controls and Tectonic Model of  

Open Energy Info (EERE)

Why Is Nevada in Hot Water? Structural Controls and Tectonic Model of Why Is Nevada in Hot Water? Structural Controls and Tectonic Model of Geothermal Systems in the Northwestern Great Basin Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Why Is Nevada in Hot Water? Structural Controls and Tectonic Model of Geothermal Systems in the Northwestern Great Basin Abstract In the western Great Basin, the Walker Lane is a system of right-lateral strike-slip faults accommodating ~15-25% of relative motion between the Pacific and North American plates. Relatively high rates of recent (<10 Ma) west-northwest extension absorb northwestward declining dextral motion in the Walker Lane, diffusing that motion into the Basin-Range. Abundant geothermal fields cluster in several northeasttrending belts in the

204

City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

San Jose - Solar Hot Water Heaters and Photovoltaic Systems San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements < Back Eligibility Commercial Construction Industrial Installer/Contractor Multi-Family Residential Residential Savings Category Solar Buying & Making Electricity Program Info State California Program Type Solar/Wind Permitting Standards Provider City of San Jose Building, Planning and Electrical Permits are required for Photovoltiac (PV) systems installed in San Jose. In most cases, PV systems must also undergo a Building Plan Review and an Electrical Plan Review. Building Plan Reviews are not required for installations that meet all of the following criteria: 1. Total panel weight (including frame) is not greater than 5 lbs. per

205

Experience on design and operation of hotel/motel solar hot water systems  

SciTech Connect

The use of solar energy to preheat domestic hot water in hotels and motels has many advantages. Year long use of these solar systems provides shorter payback periods. Temperature requirements for hotel/motel use are relatively low and are compatible with low cost flat plate collectors. Simple controls relate to higher reliability in both drain-down and heat exchanger configurations. Solar systems are easily retrofitted to most existing hotel/motel hot water systems and there are many hotels and motels across the country with roof area sufficient in size to hold the required collector arrays. Hotel/motel systems with payback periods of less than four years, which provide 70% of the total hot water load, are discussed.

Brohl, E.C.; Struss, R.G.; Sidles, P.H.

1978-01-01T23:59:59.000Z

206

Pattern Of Shallow Ground Water Flow At Mount Princeton Hot Springs,  

Open Energy Info (EERE)

Pattern Of Shallow Ground Water Flow At Mount Princeton Hot Springs, Pattern Of Shallow Ground Water Flow At Mount Princeton Hot Springs, Colorado, Using Geoelectrical Methods Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Pattern Of Shallow Ground Water Flow At Mount Princeton Hot Springs, Colorado, Using Geoelectrical Methods Details Activities (2) Areas (1) Regions (0) Abstract: In geothermal fields, open faults and fractures often act as high permeability pathways bringing hydrothermal fluids to the surface from deep reservoirs. The Mount Princeton area, in south-central Colorado, is an area that has an active geothermal system related to faulting and is therefore a suitable natural laboratory to test geophysical methods. The Sawatch range-front normal fault bordering the half-graben of the Upper Arkansas

207

Testing and analysis of load-side immersed heat exchangers for solar domestic hot water systems  

DOE Green Energy (OSTI)

This report describes work to determine the performance of load-side heat exchangers for use in residential solar domestic hot water systems. We measured the performance of four heat exchangers: a smooth coil and a finned coil having heat transfer areas of 2.5 m/sup 2/ (26 ft/sup 2/) and those having areas of 1.7 m/sup 2/ (19 ft/sup 2/). A numerical model using the thermal network program MITAS was constructed, and results were compared to the experimental results. Research showed a smooth coil with only 70% of the surface area of a finned coil performed better than the finned coil. Also, load-side heat exchangers can maintain and enhance stratification in storage tanks, permitting the use of control strategies that take advantage of stratified storage tanks to increase system performance. The analytical model, which agreed reasonably well with the experimental results, was used to vary heat exchanger flow rate and area and initial tank temperature for both a smooth- and a finned-coil heat exchanger. Increasing the heat exchanger flow rate and area results in higher heat transfer rates but not necessarily optimal performance. Lower initial tank temperatures resulted in reduced tank stratification. The smooth heat exchanger outperformed the finned heat exchanger with the same outside surface area. 15 refs., 37 figs., 9 tabs.

Farrington, R.B.; Bingham, C.E.

1987-10-01T23:59:59.000Z

208

High C/O Ratio and Weak Thermal Inversion in the Very Hot Atmosphere of Exoplanet WASP-12b  

E-Print Network (OSTI)

The carbon-to-oxygen ratio (C/O) in a planet provides critical information about its primordial origins and subsequent evolution. A primordial C/O greater than 0.8 causes a carbide-dominated interior as opposed to a silicate-dominated composition as found on Earth, and the atmospheres can also differ from those in the Solar System. The solar C/O is 0.54. Here we report an analysis of dayside multi-wavelength photometry of the transiting hot-Jupiter WASP-12b that reveals C/O >= 1 in its atmosphere. The atmosphere is abundant in CO. It is depleted in water vapor and enhanced in methane by over two orders of magnitude each compared to a solar-abundance chemical-equilibrium model at the expected temperatures. We also find that the extremely irradiated atmosphere (T > 2,500 K) of WASP-12b lacks a prominent thermal inversion, or a stratosphere, and has very efficient day- night energy circulation. The absence of a strong thermal inversion is in stark contrast to theoretical predictions for the most highly irradiate...

Madhusudhan, Nikku; Stevenson, Kevin B; Nymeyer, Sarah; Campo, Christopher J; Wheatley, Peter J; Deming, Drake; Blecic, Jasmina; Hardy, Ryan A; Lust, Nate B; Anderson, David R; Collier-Cameron, Andrew; Britt, Christopher B T; Bowman, William C; Hebb, Leslie; Hellier, Coel; Maxted, Pierre F L; Pollacco, Don; West, Richard G

2010-01-01T23:59:59.000Z

209

Air Pollution Control Regulations: No. 13- Particulate Emissions from Fossil Fuel Fired Steam or Hot Water Generating Units (Rhode Island)  

Energy.gov (U.S. Department of Energy (DOE))

The purpose of this regulation is to limit emissions of particulate matter from fossil fuel fired and wood-fired steam or hot water generating units.

210

Solar heating of buildings and domestic hot water  

SciTech Connect

Design criteria and cost analysis methods are presented for the sizing and justification of solar heat collectors for augmentation of potable water heaters and space heaters. Sufficient information is presented to enable engineers to design solar space and water heating systems or conduct basic feasibility studies preparatory to design of large installations. Both retrofit and new installations are considered. (WDM)

Beck, E.J. Jr.; Field, R.L.

1976-01-01T23:59:59.000Z

211

Opportunities for utility involvement with solar domestic hot water  

SciTech Connect

Solar water heating is one of a number of options that can be considered under utility demand-side management (DSM) programs. Utilities perceive a range of potential benefits for solar water heating in terms of customer service, energy conservation, load management, environmental enhancement, and public relations. The solar industry may benefit from utility marketing efforts, economies of scale, added credibility, financing options, and long-term maintenance arrangements. This paper covers three topics: (1) the energy and demand impacts of solar water heating on utility load profiles based on the results of four studies in the literature, (2) the results of workshops sponsored by the National Renewable Energy Laboratory (NREL) to identify key issues faced by utilities in considering residential solar water heating as a DSM option, (3) several current or planned utility programs to promote solar water heating. 7 refs.

Carlisle, N.; Christensen, C. [National Renewable Energy Lab., Golden, CO (United States); Barrett, L. [Barrett Consulting Associates, Inc., Colorado Springs, CO (United States)

1992-05-01T23:59:59.000Z

212

Hot water system is energized by exhaust gas  

Science Conference Proceedings (OSTI)

The combustion of hydrocarbon fuels (natural gas or oil) results in the formation of carbon dioxide and water (water vapor). This water vapor contains approximately 1000 Btu/lb. as latent heat and amounts to 10% of all the heat input to the boiler (combustion). This means that for an 80% efficient boiler operation, 50% of the heat wasted in the flue gas is latent heat - which can only be recovered by condensing the water vapor. Since the dew point of the flue gases is approximately 130/sup 0/F, it is necessary to cool the gases to ambient temperature for complete heat recovery. By reducing these gases to within 10/sup 0/ of the incoming cold water, this Eldon Corporation heat reclaimer can achieve temperatures as low as 45/sup 0/ in winter.

Not Available

1985-09-01T23:59:59.000Z

213

Demand Shifting with Thermal Mass in Large Commercial Buildings in a California Hot Climate Zone  

E-Print Network (OSTI)

in a California Hot Climate Zone. California Energyin a California Hot Climate Zone Peng Xu & Rongxin Yin,conditions (California Climate Zones 2–4). However, this

Xu, Peng

2010-01-01T23:59:59.000Z

214

Prototype solar heating and cooling systems, including potable hot water. Quarterly report  

DOE Green Energy (OSTI)

The progress made in the development, delivery and support of two prototype solar heating and cooling systems including potable hot water is reported. The system consists of the following subsystems: collector, auxiliary heating, potable hot water, storage, control, transport, and government-furnished site data acquisition. Included is a comparison of the proposed Solaron-Heat Pump and Solaron-Desiccant Heating and Cooling Systems, Installation Drawings, data on the Akron House at Akron, Ohio, and other program activities from July 1, 1977 through November 9, 1977.

Not Available

1977-12-01T23:59:59.000Z

215

System design package for SIMS Prototype System 2, solar hot water  

DOE Green Energy (OSTI)

This report is a collection of documents and drawings that describe a solar hot water system. The necessary information to evaluate the design and with information sufficient to assemble a similar system is presented. The International Business Machines Corporation developed prototype system 2 solar hot water for use in a single family dwelling. The system has been installed in Building Number 20, which is a single family residence on the grounds of the Veterans Administration Hospital at Togus, Maine. It consists of the following subsystems: collector, storage, energy transport, and control. It is a design with wide-spread application potential with only slight adjustments necessary in system size.

Not Available

1977-12-01T23:59:59.000Z

216

Performance of active solar domestic hot water heating systems. Comparative report, 1979-1980 season  

Science Conference Proceedings (OSTI)

The most recent composite results of analysis performed by Vitro Laboratories of solar hot water heating data for selected hot water sites in the National Solar Data Network (NSDN) are presented. Results presented have been developed on the basis of analysis of instrumented sites monitored through 1979-1980. A total of 45 sites in the National Solar Data Network (NSDN) were examined for this study. Eighteen of these were selected for in-depth treatment because of the availability of valid long term data. System descriptions, schematic diagrams and energy flow diagrams for these 18 sites are presented in Appendices A, B, and C, respectively. (WHK)

Cramer, M.A.; Kendall, P.W.; Rosenbusch, J.M.; Weinstein, R.A.

1980-01-01T23:59:59.000Z

217

System design package for SIMS prototype system 3, solar heating and domestic hot water  

DOE Green Energy (OSTI)

This report is a collation of documents and drawings that describe a prototype solar heating and hot water system using liquid flat plat collectors and a gas or electric furnace energy subsystem. The system was designed for installation into a single-family dwelling. The description, performance specification, subsystem drawings, verification plan/procedure, and hazard analysis of the system are packaged for evaluation of the system with information sufficient to assemble a similar system. The SIMS Prototype Heating and Hot Water System, Model Number 3 has been installed in a residence at Glendo State Park, Glendo, Wyoming.

Not Available

1978-11-01T23:59:59.000Z

218

Water Sampling At Mickey Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Mickey Hot Springs Area (Wood, Mickey Hot Springs Area (Wood, 2002) Exploration Activity Details Location Mickey Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from

219

Water Sampling At Umpqua Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Umpqua Hot Springs Area (Wood, Umpqua Hot Springs Area (Wood, 2002) Exploration Activity Details Location Umpqua Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from

220

Geology and alteration of the Baltazor Hot Springs and Painted Hills Thermal Areas, Humboldt County, Nevada  

DOE Green Energy (OSTI)

The Baltazor Hot Springs KGRA and nearby Painted Hills thermal area are situated in Humboldt County, northwestern Nevada along the northwestern margin of the Basin and Range province. The oldest rocks exposed in the Baltazor area are eugeosynclinal metasedimentary and subordinate metavolcanic rocks of Permian to Triassic age intruded by Cretaceous diorite and quartz diorite. These are overlain by a thick volcanic and volcaniclastic sequence of Miocene through Pliocene age. Pre-Tertiary rocks are not exposed in the Painted Hills. Principal structures in the Baltazor area are intersecting high-angle normal faults which trend northerly and northwesterly. Quaternary landslides are dominant in the Painted Hills, although northerly- and northwesterly-trending high-angle faults are also present. Hydrothermal alteration and mineralization at Baltazor and in the Painted Hills are of several different styles and ages. Copper-bearing quartz veins in pre-Tertiary rocks antedate Cenozoic volcanism and sedimentation. The heat source for thermal phenomena and alteration in both areas is probably deep fault-controlled fluid circulation coupled with an abnormally high regional thermal gradient. (MHR)

Hulen, J.B.

1979-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Effects of plumbing attachments on heat losses from solar domestic hot water storage tanks. Final report, Part 2  

DOE Green Energy (OSTI)

The Solar Rating and Certification Corporation (SRCC) has established a standardized methodology for determining the performance rating of the Solar Domestic Hot Water (SDHW) systems it certifies under OG-300. Measured performance data for the solar collector component(s) of the system are used along with numerical models for the balance of the system to calculate the system`s thermal performance under a standard set of rating conditions. SRCC uses TRNSYS to model each of the components that comprise the system. The majority of the SRCC certified systems include a thermal storage tank with an auxiliary electrical heater. The most common being a conventional fifty gallon electric tank water heater. Presently, the thermal losses from these tanks are calculated using Q = U {center_dot} A {center_dot} {Delta}T. Unfortunately, this generalized formula does not adequately address temperature stratification both within the tank as well as in the ambient air surrounding the tank, non-uniform insulation jacket, thermal siphoning in the fluid lines attached to the tank, and plumbing fittings attached to the tank. This study is intended to address only that part of the problem that deals with the plumbing fittings attached to the tank. Heat losses from a storage tank and its plumbing fittings involve three different operating modes: charging, discharging and standby. In the charging mode, the tank receives energy from the solar collector. In the discharge mode, water flows from the storage tank through the distribution pipes to the faucets and cold city water enters the tank. In the standby mode, there is no forced water flow into or out of the tank. In this experimental study, only the standby mode was considered.

Song, J.; Wood, B.D. [Univ. of Nevada, Reno, NV (United States); Ji, L.J. [Arizona State Univ., Tempe, AZ (United States)

1998-03-01T23:59:59.000Z

222

Savings Project: Insulate Hot Water Pipes for Energy Savings...  

NLE Websites -- All DOE Office Websites (Extended Search)

the insulation done during new construction of a home, during other work on your water heater or pipes, or insulating the pipes yourself, is well worth the effort. In special...

223

CPS Energy - Solar Hot Water Rebate Program (Texas) | Open Energy...  

Open Energy Info (EERE)

Clean Energy Analysis Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New...

224

Orange County - Solar Hot Water Rebate Program (Florida) | Open...  

Open Energy Info (EERE)

Clean Energy Analysis Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New...

225

Measurements of the Electrical Conductivities of Air over Hot Water  

Science Conference Proceedings (OSTI)

Measurements of the conduction current between two electrodes in air over recently boiled water have been interpreted by Carlon as indicating that the humidified air became highly conductive and that large numbers of ions were produced in the air ...

C. B. Moore; B. Vonnegut

1988-03-01T23:59:59.000Z

226

Solar hot water pays off for commercial enterprises  

SciTech Connect

Two solar water heating systems in Florida are described. One system supplies a motel for guest rooms, laundry, and kitchen. The other system serves a coin-operated laundry. (WDM)

Jones, H.

1976-05-01T23:59:59.000Z

227

NV Energy (Southern Nevada)- Solar Hot Water Incentive Program  

Energy.gov (U.S. Department of Energy (DOE))

NV Energy is providing an incentive for its residential customers to install solar water heaters on their homes. As of May 1, 2012, NV Energy electric customers in Southern Nevada who own their...

228

Solar Hot Water Contractor Licensing (Arkansas) | Open Energy...  

Open Energy Info (EERE)

Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New Pages Recent Changes All...

229

Commercial Solar Hot Water Financing Program | Open Energy Information  

Open Energy Info (EERE)

Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New Pages Recent Changes All...

230

Gulf Power - Solar Thermal Water Heating Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Gulf Power - Solar Thermal Water Heating Program Gulf Power - Solar Thermal Water Heating Program Gulf Power - Solar Thermal Water Heating Program < Back Eligibility Low-Income Residential Multi-Family Residential Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $1,000 Program Info State Florida Program Type Utility Rebate Program Provider Energy Efficiency '''''This program reopened on October 3, 2011 for 2012 applications. Funding is limited and must be reserved through online application before the installation of qualifying solar water heating systems. See Gulf Power's [http://www.gulfpower.com/renewable/solarThermal.asp Solar Water Heating] web site for more information.''''' Gulf Power offers a Solar Thermal Water Heating rebate to customers who install water heaters. This program started after the original pilot

231

Bipole-dipole survey at Roosevelt Hot Springs, Thermal Area, Beaver County, Utah  

DOE Green Energy (OSTI)

A bipole-dipole electrical resistivity survey at Roosevelt Hot Springs thermal area, Beaver County, Utah was undertaken to evaluate the technique in a well-studied Basin and Range geothermal prospect. The major electrical characteristics of the area are clearly revealed but are not particularly descriptive of the geothermal system. More subtle variations of electrical resistivity accompanying the geothermal activity are detectable, although the influence of near-surface lateral resistivity variations imposes upon the survey design the necessity of a high station density. A useful practical step is to conduct a survey using transmitter locations and orientations which minimize the response of known features such as the resistivity boundary due to a range front fault. Survey results illustrate the effects of transmitter orientation and placement, and of subtle lateral resistivity variations. A known near-surface conductive zone is detected while no evidence is found for a deep conductive region.

Frangos, W.; Ward, S.H.

1980-09-01T23:59:59.000Z

232

Application of solar energy to the supply of industrial hot water. Volume 1. Final design report. [For American Linen Supply laundry in El Centro, California  

SciTech Connect

The conceptual design of a solar system for integration into the process hot water and steam services for the laundry facility, American Linen Sypply, located in El Centro, California is presented. A tracking parabolic collector array and thermal storage tanks will be used. Process analysis, instrumentation for control and data analysis, construction, maintenance and safety, energy reduction analysis, and economic analysis are described. A waste heat reclamation system is included in the design. (WHK)

1977-01-31T23:59:59.000Z

233

Water Sampling At Zim's Hot Springs Geothermal Area (Wood, 2002) | Open  

Open Energy Info (EERE)

2002) 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Zim's Hot Springs Geothermal Area (Wood, 2002) Exploration Activity Details Location Zim's Hot Springs Geothermal Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the

234

Water Sampling At Breitenbush Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Wood, 2002) Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Breitenbush Hot Springs Area (Wood, 2002) Exploration Activity Details Location Breitenbush Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the

235

Water Sampling At Belknap-Foley-Bigelow Hot Springs Area (Wood, 2002) |  

Open Energy Info (EERE)

Wood, 2002) Wood, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Belknap-Foley-Bigelow Hot Springs Area (Wood, 2002) Exploration Activity Details Location Belknap-Foley-Bigelow Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the

236

Thermal modeling of the Clear Lake magmatic system, California: Implications for conventional and hot dry rock geothermal development  

Science Conference Proceedings (OSTI)

The combination of recent volcanism, high heat flow ({ge} HFU or 167 mW/m{sup 2}), and high conductive geothermal gradient (up to 120{degree} C/km) makes the Clear Lake region of northern California one of the best prospects for hot dry rock (HDR) geothermal development in the US. The lack of permeability in exploration wells and lack of evidence for widespread geothermal reservoirs north of the Collayomi fault zone are not reassuring indications for conventional geothermal development. This report summarizes results of thermal modeling of the Clear Lake magmatic system, and discusses implications for HDR site selection in the region. The thermal models incorporate a wide range of constraints including the distribution and nature of volcanism in time and space, water and gas geochemistry, well data, and geophysical surveys. The nature of upper crustal magma bodies at Clear Lake is inferred from studying sequences of related silicic lavas, which tell a story of multistage mixing of silicic and mafic magma in clusters of small upper crustal chambers. Thermobarometry on metamorphic xenoliths yield temperature and pressure estimates of {approximately}780--900 C and 4--6 kb respectively, indicating that at least a portion of the deep magma system resided at depths from 14 to 21 km (9 to 12 mi). The results of thermal modeling support previous assessments of the high HDR potential of the area, and suggest the possibility that granitic bodies similar to The Geysers felsite may underlie much of the Clear Lake region at depths as little as 3--6 km. This is significant because future HDR reservoirs could potentially be sited in relatively shallow granitoid plutons rather than in structurally complex Franciscan basement rocks.

Stimac, J.; Goff, F.; Wohletz, K.

1997-06-01T23:59:59.000Z

237

Hot water tank for use with a combination of solar energy and heat-pump desuperheating  

DOE Patents (OSTI)

A water heater or system is described which includes a hot water tank having disposed therein a movable baffle to function as a barrier between the incoming volume of cold water entering the tank and the volume of heated water entering the tank which is heated by the circulation of the cold water through a solar collector and/or a desuperheater of a heat pump so as to optimize the manner in which heat is imparted to the water in accordance to the demand on the water heater or system. A supplemental heater is also provided and it is connected so as to supplement the heating of the water in the event that the solar collector and/or desuperheater cannot impart all of the desired heat input into the water.

Andrews, J.W.

1980-06-25T23:59:59.000Z

238

Hot water tank for use with a combination of solar energy and heat-pump desuperheating  

DOE Patents (OSTI)

A water heater or system which includes a hot water tank having disposed therein a movable baffle to function as a barrier between the incoming volume of cold water entering the tank and the volume of heated water entering the tank which is heated by the circulation of the cold water through a solar collector and/or a desuperheater of a heat pump so as to optimize the manner in which heat is imparted to the water in accordance to the demand on the water heater or system. A supplemental heater is also provided and it is connected so as to supplement the heating of the water in the event that the solar collector and/or desuperheater cannot impart all of the desired heat input into the water.

Andrews, John W. (Sag Harbor, NY)

1983-06-28T23:59:59.000Z

239

NORTH PORTAL-HOT WATER CALCULATION-SHOP BUILDING #5006  

SciTech Connect

The purpose of this design analysis and calculation is to determine the demand for domestic cold water and to size the supply main for the Shop Building No.5006 in accordance with the Uniform Plumbing Code (UPC) (Section 4.4.1) and the U.S. Department of Energy, Order 6430.1A-1540 (Section 4.4.2).

R. Blackstone

2006-01-25T23:59:59.000Z

240

INSTALLATION CERTIFICATE CF-6R-MECH-01 Domestic Hot Water (DHW) (Page 1 of 2)  

E-Print Network (OSTI)

: Heater Type CEC Certified Mfr Name & Model Number Distribution Type (Std, Point-of- Use, etc; and Pipe insulation for steam hydronic heating systems or hot water systems >15 psi, meets the requirements or fewer dwelling units which have (1) less than 25' of distribution piping outdoors; (2) zero distribution

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Improved Airborne Hot-Wire Measurements of Ice Water Content in Clouds  

Science Conference Proceedings (OSTI)

Airborne measurements of ice water content (IWC) in both ice and mixed phase clouds remain one of the long standing problems in experimental cloud physics. For nearly three decades, IWC has been measured with the help of the Nevzorov hot-wire ...

A. Korolev; J. W. Strapp; G. A. Isaac; E. Emery

242

Operation manual: solar hot water preheat, Henry's Lake State Park. Final technical report  

DOE Green Energy (OSTI)

Instructions for the assembling of the panel array and start-up procedures for the water heater are provided. The preheat system is designed for the months of May through September and provides 75% of hot water for an 800 gal/day use. The panels are disassembled and stored during the winter months. Information on troubleshooting the system, a set of as built plans and warranty material are included.

Not Available

1985-01-01T23:59:59.000Z

243

Don't Let Your Money and Hot Water Go Down the Drain | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Don't Let Your Money and Hot Water Go Down the Drain Don't Let Your Money and Hot Water Go Down the Drain Don't Let Your Money and Hot Water Go Down the Drain December 9, 2008 - 4:00am Addthis John Lippert Do you look at your retirement savings statements and feel like you're sending your money down the drain? Do you deposit more money each paycheck into your retirement account, but find the balance goes down, not up? Pssst, want to invest in a "sure thing?" No, this isn't a scam. It's a device that has no moving parts to break down, but is certain to save you energy, and thus save you money by lowering your utility bills. When we all take showers and baths, wash the dishes or clothes, and wash our hands, we send heated water literally down the drain. That typically represents 80%-90% of the energy used to heat water in a home. Drain-water (or

244

Low rank coal upgrading in a flow of hot water  

Science Conference Proceedings (OSTI)

Simultaneous hydrothermal degradation and extraction at around 350{sup o}C using flowing solvent as a reaction/extraction medium were proposed for upgrading brown coal, more specifically, for converting brown coal into several fractions having different molecular weight and chemical structure under mild conditions. When an Australian brown coal, Loy Yang coal, was treated by water at 350{sup o}C under 18 MPa, the coal was separated into four fractions: gaseous product by 8% yield, water-soluble extract at room temperature (soluble) by 23% yield, extract precipitates as solid at room temperature (deposit) by 23% yield, and residual coal (upgraded coal) by 46% yield on daf basis. The separation was found to be realized by in situ extraction of low-molecular-weight substances released from coal macromolecular structure and/or those generated by hydrothermal decomposition reactions at 350{sup o}C. The solid products obtained, deposit and upgraded coal, were characterized in detail to examine the possibility of their effective utilization as solid fuel and chemical feed stock. The upgraded coal showed higher heating value and higher gasification reactivity than the parent coal, indicating that the upgraded coal can be a better solid fuel than the parent coal. The solid extract, deposit, was found to show thermoplasticity at less than 200{sup o}C, suggesting the possibility of utilizing the deposit as a raw material of high performance carbon materials. Several variables affecting the performance of the proposed method are also examined in detail in this paper. 12 refs., 8 figs., 3 tabs.

Masato Morimoto; Hiroyuki Nakagawa; Kouichi Miura [Kyoto University, Kyoto (Japan). Department of Chemical Engineering

2009-09-15T23:59:59.000Z

245

Thermal conductivity of rocks associated with energy extraction from hot dry rock geothermal systems  

DOE Green Energy (OSTI)

Results of thermal conductivity measurements are given for 14 drill core rock samples taken from two exploratory HDR geothermal wellbores (maximum depth of 2929 m (9608 ft) drilled into Precambrian granitic rock in the Jemez Mountains of northern New Mexico. These samples have been petrographically characterized and in general represent fresh competent Precambrian material of deep origin. Thermal conductivities, modal analyses, and densities are given for all core samples studied under dry and water-saturated conditions. Additional measurements are reported for several sedimentary rocks encountered in the upper 760 m (2500 ft) of that same region. A cut-bar thermal conductivity comparator and a transient needle probe were used for the determinations with fused quartz and Pyroceram 9606 as the standards. The maximum temperature range of the measurements was from the ice point to 250/sup 0/C. The measurements on wet, water-saturated rock were limited to the temperature range below room temperature. Conductivity values of the dense core rock samples were generally within the range from 2 to 2.9 W/mK at 200/sup 0/C. Excellent agreement was achieved between these laboratory measurements of thermal conductivity and those obtained by in situ measurements used in the HDR wellbores. By using samples of sufficient thickness to provide a statistically representative heat flow path, no difference between conductivity values and their temperature coefficients for orthogonal directions (heat flow parallel or perpendicular to core axis) was observed. This isotropic behavior was even found for highly foliated gneissic specimens. Estimates of thermal conductivity based on a composite dispersion analysis utilizing pure minerallic phase conductivities and detailed modal analyses usually agreed to within 9 percent of the experimental values.

Sibbitt, W.L.; Dodson, J.G.; Tester, J.W.

1978-01-01T23:59:59.000Z

246

A solar concentrating photovoltaic/thermal collector.  

E-Print Network (OSTI)

??This thesis discusses aspects of a novel solar concentrating photovoltaic / thermal (PV/T) collector that has been designed to produce both electricity and hot water.… (more)

Coventry, Joseph S

2008-01-01T23:59:59.000Z

247

Measure Guideline: Combination Forced-Air Space and Tankless Domestic Hot Water Heating Systems  

SciTech Connect

This document describes design and application guidance for combination space and tankless domestic hot water heating systems (combination systems) used in residential buildings, based on field evaluation, testing, and industry meetings conducted by Building Science Corporation. As residential building enclosure improvements continue to drive heating loads down, using the same water heating equipment for both space heating and domestic water heating becomes attractive from an initial cost and space-saving perspective. This topic is applicable to single- and multi-family residential buildings, both new and retrofitted.

Rudd, A.

2012-08-01T23:59:59.000Z

248

Solar hot water demonstration project at Red Star Industrial Laundry, Fresno, California  

SciTech Connect

The Final Report of the Solar Hot Water System located at the Red Star Industrial Laundry, 3333 Sabre Avenue, Fresno, California, is presented. The system was designed as an integrated wastewater heat recovery and solar preheating system to supply a part of the hot water requirements. It was estimated that the natural gas demand for hot water heating could be reduced by 56 percent (44 percent heat reclamation and 12 percent solar). The system consists of a 16,500 gallon tube-and-shell wastewater heat recovery subsystem combined with a pass-through 6,528 square foot flat plate Ying Manufacturing Company Model SP4120 solar collector subsystem, a 12,500 gallon fiber glass water storage tank subsystem, pumps, heat exchangers, controls, and associated plumbing. The design output of the solar subsystem is approximately 2.6 x 10/sup 9/ Btu/year. Auxiliary energy is provided by a gas fired low pressure boiler servicing a 4,000 gallon service tank. This project is part of the US Department of Energy's Solar Demonstration Program with DOE sharing $184,841 of the $260,693 construction cost. The system was turned on in July 1977, and acceptance tests completed in September 1977. The demonstration period for this project ends September 2, 1982.

1980-07-01T23:59:59.000Z

249

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

votes, thermal preferences and cooling preferences. Thefor cooling and thermal preferences Cooling exposure Coolingterms of thermal sensation, heating preferences and cooling

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

250

Cost effective solar hot water system for econo-travel motor hotel located at Hampton, VA  

SciTech Connect

This paper gives the final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 2708 Mercury Boulevard, Hampton, Virginia. The description of the system along with the final cost breakdown, performance data and payback time are given. The payback time for the installed system will be approximately four (4) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. As called for in the proposal to DOE, the success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

1978-11-01T23:59:59.000Z

251

Cost effective solar hot water system for Econo-Travel Motor Hotel, Chesapeake, Virginia. Final report  

SciTech Connect

The final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 4725 W. Military Highway, Chesapeake, Virginia, is presented. The description of the system along with the final breakdown performance data and payback time are given. The payback time for the installed system will be approximately four (4) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. As called for in the proposal to DOE, the success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

1978-12-01T23:59:59.000Z

252

Cost effective solar hot water system for econo-travel motor hotel located at Hampton, VA  

DOE Green Energy (OSTI)

This paper gives the final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 2708 Mercury Boulevard, Hampton, Virginia. The description of the system along with the final cost breakdown, performance data and payback time are given. The payback time for the installed system will be approximately four (4) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. As called for in the proposal to DOE, the success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

Not Available

1978-11-01T23:59:59.000Z

253

Cost effective solar hot water system for Econo-Travel Motor Hotel, Chesapeake, Virginia. Final report  

DOE Green Energy (OSTI)

The final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 4725 W. Military Highway, Chesapeake, Virginia, is presented. The description of the system along with the final breakdown performance data and payback time are given. The payback time for the installed system will be approximately four (4) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. As called for in the proposal to DOE, the success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

Not Available

1978-12-01T23:59:59.000Z

254

U.S. Marine Corps Base Camp Pendleton: Using The Sun For Hot Water And Electricity, Federal Energy Management Program (FEMP) (Fact Sheet)  

NLE Websites -- All DOE Office Websites (Extended Search)

U.S. Marine Corps Base Camp Pendleton, U.S. Marine Corps Base Camp Pendleton, covering 125,000 acres including 17 miles of Southern-California coastline, is the largest expeditionary training facility on the West Coast. More than 41,500 marines and family members call the base home, which reaches a daytime population of approximately 100,000. In fiscal year 2007, Camp Pendleton saved energy and money and reduced greenhouse gas (GHG) emissions through solar hot water (SHW) and photovoltaic (PV) arrays. The base implemented two integrated solar thermal/PV systems at its 53 Area and 62 Area training pools. The projects demonstrate Camp Pendleton's continuing commitment to energy conservation while helping meet Federal requirements for on-site renewable energy and solar hot water generation.

255

U.S. Marine Corps Base Camp Pendleton: Using The Sun For Hot Water And Electricity, Federal Energy Management Program (FEMP) (Fact Sheet)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

U.S. Marine Corps Base Camp Pendleton, U.S. Marine Corps Base Camp Pendleton, covering 125,000 acres including 17 miles of Southern-California coastline, is the largest expeditionary training facility on the West Coast. More than 41,500 marines and family members call the base home, which reaches a daytime population of approximately 100,000. In fiscal year 2007, Camp Pendleton saved energy and money and reduced greenhouse gas (GHG) emissions through solar hot water (SHW) and photovoltaic (PV) arrays. The base implemented two integrated solar thermal/PV systems at its 53 Area and 62 Area training pools. The projects demonstrate Camp Pendleton's continuing commitment to energy conservation while helping meet Federal requirements for on-site renewable energy and solar hot water generation.

256

Geothermal investigations in Idaho. Part 12. Stable isotopic evaluation of thermal water occurrences in the Weiser and Little Salmon River drainage basins and adjacent areas, west-central Idaho with attendant gravity and magnetic data on the Weiser area  

DOE Green Energy (OSTI)

Fifteen thermal springs, two thermal wells, and eight cold springs in the Weiser and Little Salmon river drainages were sampled for deuterium and oxygen-18 analysis during the fall of 1981. The straight-line fit of delta D and delta /sup 18/O versus latitude and longitude observed in the data is what would be expected if the recharge areas for the thermal and non-thermal waters were in close proximity to their respective discharge points. The discrete values of delta D and delta /sup 18/O for each thermal discharge suggest that none of the sampled thermal systems have common sources. The depleted deuterium and oxygen-18 contents of most thermal relative to non-thermal waters sampled suggests that the thermal waters might be Pleistocene age precipitation. The isotopic data suggest little or no evidence for mixing of thermal and non-thermal water for the sampled discharges. Thermal waters from Weiser, Crane Creek, Cove Creek, and White Licks hot springs show enrichment in oxygen-18 suggesting that these waters have been at elevated temperatures relative to other sampled thermal discharges in the area. Gravity and magnetic data gathered by the Idaho State University Geology Department in the Weiser Hot Springs area suggest that southeastward plunging synclinal-anticlinal couples, which underlie the hot springs, are cut south of the springs by a northeast trending boundary fault.

Mitchell, J.C.; Bideganeta, K.; Palmer, M.A.

1984-12-01T23:59:59.000Z

257

Surface water supply for the Clearlake, California Hot Dry Rock Geothermal Project  

DOE Green Energy (OSTI)

It is proposed to construct a demonstration Hot Dry Rock (HDR) geothermal plant in the vicinity of the City of Clearlake. An interim evaluation has been made of the availability of surface water to supply the plant. The evaluation has required consideration of the likely water consumption of such a plant. It has also required consideration of population, land, and water uses in the drainage basins adjacent to Clear Lake, where the HDR demonstration project is likely to be located. Five sources were identified that appear to be able to supply water of suitable quality in adequate quantity for initial filling of the reservoir, and on a continuing basis, as makeup for water losses during operation. Those sources are California Cities Water Company, a municipal supplier to the City of Clearlake; Clear Lake, controlled by Yolo County Flood Control and Water Conservation District; Borax Lake, controlled by a local developer; Southeast Regional Wastewater Treatment Plant, controlled by Lake County; and wells, ponds, and streams on private land. The evaluation involved the water uses, water rights, stream flows, precipitation, evaporation, a water balance, and water quality. In spite of California`s prolonged drought, the interim conclusion is that adequate water is available at a reasonable cost to supply the proposed HDR demonstration project.

Jager, A.R.

1996-03-01T23:59:59.000Z

258

Design and Experiments of a Solar Low-temperature Hot Water Floor Radiant Heating System  

E-Print Network (OSTI)

The solar low-temperature hot water floor radiant heating system combines solar energy heating with floor radiant heating. This kind of environmental heating way not only saves fossil resources and reduces pollution, but also makes people feel more comfortable. First, the authors devised an experimental scheme and set up the laboratory. Second, we collected a great deal of data on the system in different situations. Finally, we conclude that such heating system is feasible and one of the best heating methods.

Wu, Z.; Li, D.

2006-01-01T23:59:59.000Z

259

Super-hot (T > 30 MK) Thermal Plasma in Solar Flares  

E-Print Network (OSTI)

4-9 (excl. 7) for the three thermal energy bands, which eachfor den- sity, thermal energy, & line ratio: propagated fromin the thermal and non-thermal energy ranges (contours at

Caspi, Amir

2010-01-01T23:59:59.000Z

260

Lightweight concrete materials and structural systems for water tanks for thermal storage. Final report  

DOE Green Energy (OSTI)

Thermally efficient hot water storage tanks were designed, fabricated and evaluated. The tanks were made using cellular concrete at a nominal density of 100 lb/ft/sup 3/ for the structural elements and at a 30 lb/ft/sup 3/ density for the insulating elements. Thermal performance testing of the tanks was done using a static decay test since the test procedure specified in ASHRAE 94-77 was not experimentally practical. A series of composition modifications to the cellular concrete mix were investigated and the addition of alkaline resistant glass fibers was found to enhance the mechanical properties at no sacrifice in thermal behavior. Economic analysis indicated that cellular concrete provides a cost-effective insulating material. The total portability of the plant for producing cellular concrete makes cellular concrete amenable to on-site fabrication and uniquely adaptable to retrofit applications.

Buckman, R.W. Jr.; Elia, G.G.; Ichikawa, Y.

1980-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Minnesota Power - Solar-Thermal Water Heating Rebate Program | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Minnesota Power - Solar-Thermal Water Heating Rebate Program Minnesota Power - Solar-Thermal Water Heating Rebate Program Minnesota Power - Solar-Thermal Water Heating Rebate Program < Back Eligibility Commercial Industrial Low-Income Residential Multi-Family Residential Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate Single-family unit: $2,000 Two- to three-family units: $4,000 Multi-family units (four or more): $10,000 Businesses: $25,000 Program Info Start Date 03/2010 Expiration Date 12/31/2013 State Minnesota Program Type Utility Rebate Program Rebate Amount 25% of costs Provider Minnesota Power Minnesota Power offers a 25% rebate for qualifying solar thermal water heating systems. The maximum award for single-family customers is $2,000 per customer; $4,000 for 2-3 family unit buildings; $10,000 for buildings

262

Catalog of thermal waters in New Mexico. Hydrologic report 4  

DOE Green Energy (OSTI)

Waters at 67 locations in New Mexico discharge at anomalous temperatures. Details on these thermal water resources such as the location, temperature, discharge rate, field pH, and specific conductance are presented in 29 tables and 47 figures. Included also are 244 chemical analyses of water from 38 areas.

Summers, W.K.

1976-01-01T23:59:59.000Z

263

A pilot study of the building integrated photovoltaic thermal (BIPVT) collector for commercial applications in Malaysia  

Science Conference Proceedings (OSTI)

Building integrated photovoltaic thermal solar collector (BIPVT) has been designed to produce both electricity and hot water and later integrated to building. The hot water is produced at the useful temperatures for the applications in Malaysia such ... Keywords: BIPVT collector, hot water heating system, thermal and electrical efficiency

A. Ibrahim; M. Y. Othman; M. H. Ruslan; S. Mat; A. Zaharim; K. Sopian

2011-07-01T23:59:59.000Z

264

Geophysical investigations of the Baltazor Hot Springs known geothermal resource area and the Painted Hills thermal area, Humboldt County, Nevada  

DOE Green Energy (OSTI)

Geophysical investigations of the Baltazor Hot Springs KGRA and the Painted Hills thermal area, Humboldt Co., Nevada are described. The study includes a gravity survey of 284 stations covering 750 sq km, numerical modeling and interpretation of five detailed gravity profiles, numerical modeling and inerpretation of 21.8 line-km of dipole-dipole electrical resistivity data along four profiles, and a qualitative inerpretation of 38 line-km of self-potential data along eight profiles. The primary purpose of the investigation is to try to determine the nature of the geologic controls of the thermal anomalies at the two areas.

Edquist, R.K.

1981-02-01T23:59:59.000Z

265

Solar production of industrial process hot water: operation and evaluation of the Campbell Soup hot water solar facility. Final report, September 1, 1979-December 10, 1980  

DOE Green Energy (OSTI)

The operation and evaluation of a solar hot water facility designed by Acurex Corporation and installed (November 1977) at the Campbell Soup Company Sacramento, California canning plant is summarized. The period of evaluation was for 12 months from October 1979 through September 1980. The objective of the work was to obtain additional, long term data on the operation and performance of the facility. Minor modifications to the facility were completed. The system was operated for 15 months, and 12 months of detailed data were evaluated. The facility was available for operation 99% of the time during the last 8 months of evaluation. A detailed description of the solar facility and of the operating experience is given, and a summary of system performance for the 12 month operation/evaluation period is presented. Recommendations for large-scale solar facilities based on this project's experience are given, and an environmental impact assessment for the Campbell Soup solar facility is provided. (WHK)

Kull, J. I.; Niemeyer, W. N.; Youngblood, S. B.

1980-12-01T23:59:59.000Z

266

Peak Load Management of Thermal Loads Using Advanced Thermal Energy Storage Technologies  

Science Conference Proceedings (OSTI)

Almost 50% of electric energy delivered to residences is converted into some sort of thermal energy—hot water, air conditioning, and refrigeration. Storing energy in thermal form is cheaper especially when the medium used to store the energy is an end-use medium for example, hot water. This technical update evaluates two different technologies for storing energy—in cold water and in hot water.GreenPeak technology, a storage condensing unit (SCU) from IE Technologies, uses an ...

2013-12-20T23:59:59.000Z

267

Geochemical Sampling of Thermal Waters in Nevada | Open Energy Information  

Open Energy Info (EERE)

Geochemical Sampling of Thermal Waters in Nevada Geochemical Sampling of Thermal Waters in Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geochemical Sampling of Thermal Waters in Nevada Abstract There are 1000 thermal springs in Nevada for which a location is known, but for which there are no available temperature (or chemical) measurements. Although many of these sites are within known geothermal areas and are located near springs for which temperature and/or geochemical data are available for one of the springs, many of these sites are not so located and require evaluation before the geothermal potential of the area can be assessed. In order to begin filling in data gaps, water sampling commenced in 2002 when over 70 analyses were obtained from springs with previously

268

Marshall Municipal Utilities- Solar Thermal Water Heater Rebate Program  

Energy.gov (U.S. Department of Energy (DOE))

Marshall Municipal Utilities (MMU) offers residential customers rebates for installing a ENERGY STAR Solar Thermal Water Heater. Rebates are based on the size of the system; MMU offers $20 per...

269

Multielement geochemistry of solid materials in geothermal systems and its applications. Part 1. Hot-water system at the Roosevelt Hot Springs KGRA, Utah  

DOE Green Energy (OSTI)

Geochemical studies of the geothermal system at Roosevelt Hot Springs, Utah, have led to development of chemical criteria for recognition of major features of the system and to a three-dimensional model for chemical zoning in the system. Based on this improved level of understanding several new or modified geochemical exploration and assessment techniques have been defined and are probably broadly applicable to evaluation of hot-water geothermal systems. The main purpose of this work was the development or adaptation of solids geochemical exploration techniques for use in the geothermal environment. (MHR)

Bamford, R.W.; Christensen, O.D.; Capuano, R.M.

1980-02-01T23:59:59.000Z

270

Application of solar energy to the supply of hot water for textile dyeing. Final report, CDRL/PA 10  

DOE Green Energy (OSTI)

The design plan for a solar process hot water system for a textile dye beck at Riegel Textile Corporation's LaFrance, South Carolina, facilities is presented. The solar system consists of 396 GE model TC 100 evacuated tube collector modules arranged in a ground mounted array with a total collector area of 6680 square feet. The system includes an 8000-gallon hot water storage tank. Systems analyses, specification sheets, performance data, and an economic evaluation of the proposed system are presented. (WHK)

None

1977-09-01T23:59:59.000Z

271

Estimating Energy and Water Losses in Residential Hot Water Distribution Systems  

E-Print Network (OSTI)

by showers, faucets, and dishwashers. (Actual leaks of hotdraws for sinks and dishwashers may not waste water, from anheat the water. For dishwashers, not only is energy wasted

Lutz, James

2005-01-01T23:59:59.000Z

272

A phenomenological model of thermal-hydraulics of convective boiling during the quenching of hot rod bundles  

Science Conference Proceedings (OSTI)

After completion of the thermal-hydraulic model developed in a companion paper, the authors performed developmental assessment calculation of the model using steady-state and transient post-critical heat flux (CHF) data. This paper discusses the results of those calculations. The overall interfacial drag model predicted reasonable drag coefficients for both the nucleate boiling and the inverted annular flow (IAF) regimes. The predicted pressure drops agreed reasonably well with the measured data of two transient experiments, CCTF Run 14 and a Lehigh reflood test. The thermal-hydraulic model for post-CHF convective heat transfer predicted the rewetting velocities reasonably well for both experiments. The predicted average slope of the wall temperature traces for these tests showed reasonable agreement with the measured data, indicating that the transient-calculated precursory cooling rates agreed with measured data. The hot-patch model, in conjunction with the other thermal-hydraulic models, was capable of modeling the Winfrith post-CHF hot-patch experiments. The hot-patch model kept the wall temperatures at the specified levels in the hot-patch regions and did not allow any quench-front propagation from either the bottom or the top of the test section. The interfacial heat-transfer model tended to slightly underpredict the vapor temperatures. The maximum difference between calculated and measured vapor temperatures was 20%, with a 10% difference for the remainder of the runs considered. The wall-to-fluid heat transfer was predicted reasonably well, and the predicted wall temperatures were in reasonable agreement with measured data with a maximum relative error of less than 13%.

Unal, C.; Nelson, R.

1991-01-01T23:59:59.000Z

273

Avoiding Carbon Bed Hot Spots in Thermal Process Off-Gas Systems  

Science Conference Proceedings (OSTI)

Mercury has had various uses in nuclear fuel reprocessing and other nuclear processes, and so is often present in radioactive and mixed (radioactive and hazardous) wastes. Test programs performed in recent years have shown that mercury in off-gas streams from processes that treat radioactive wastes can be controlled using fixed beds of activated sulfur-impregnated carbon, to levels low enough to comply with air emission regulations such as the Hazardous Waste Combustor (HWC) Maximum Achievable Control Technology (MACT) standards. Carbon bed hot spots or fires have occurred several times during these tests, and also during a remediation of tanks that contained mixed waste. Hot spots occur when localized areas in a carbon bed become heated to temperatures where oxidation occurs. This heating typically occurs due to heat of absoption of gas species onto the carbon, but it can also be caused through external means such as external heaters used to heat the carbon bed vessel. Hot spots, if not promptly mitigated, can grow into bed fires. Carbon bed hot spots and fires must be avoided in processes that treat radioactive and mixed waste. Hot spots are detected by (a) monitoring in-bed and bed outlet gas temperatures, and (b) more important, monitoring of bed outlet gas CO concentrations. Hot spots are mitigated by (a) designing for appropriate in-bed gas velocity, for avoiding gas flow maldistribution, and for sufficient but not excessive bed depth, (b) appropriate monitoring and control of gas and bed temperatures and compositions, and (c) prompt implementation of corrective actions if bed hot spots are detected. Corrective actions must be implemented quickly if bed hot spots are detected, using a graded approach and sequence starting with corrective actions that are simple, quick, cause the least impact to the process, and are easiest to recover from.

Nick Soelberg; Joe Enneking

2011-05-01T23:59:59.000Z

274

Measured electric hot water standby and demand loads from Pacific Northwest homes. End-Use Load and Consumer Assessment Program  

SciTech Connect

The Bonneville Power Administration began the End-Use Load and Consumer Assessment Program (ELCAP) in 1983 to obtain metered hourly end-use consumption data for a large sample of new and existing residential and commercial buildings in the Pacific Northwest. Loads and load shapes from the first 3 years of data fro each of several ELCAP residential studies representing various segments of the housing population have been summarized by Pratt et al. The analysis reported here uses the ELCAP data to investigate in much greater detail the relationship of key occupant and tank characteristics to the consumption of electricity for water heating. The hourly data collected provides opportunities to understand electricity consumption for heating water and to examine assumptions about water heating that are critical to load forecasting and conservation resource assessments. Specific objectives of this analysis are to: (A) determine the current baseline for standby heat losses by determining the standby heat loss of each hot water tank in the sample, (B) examine key assumptions affecting standby heat losses such as hot water temperatures and tank sizes and locations, (C) estimate, where possible, impacts on standby heat losses by conservation measures such as insulating tank wraps, pipe wraps, anticonvection valves or traps, and insulating bottom boards, (D) estimate the EF-factors used by the federal efficiency standards and the nominal R-values of the tanks in the sample, (E) develop estimates of demand for hot water for each home in the sample by subtracting the standby load from the total hot water load, (F) examine the relationship between the ages and number of occupants and the hot water demand, (G) place the standby and demand components of water heating electricity consumption in perspective with the total hot water load and load shape.

Pratt, R.G.; Ross, B.A.

1991-11-01T23:59:59.000Z

275

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

after the exposure and water intake were recorded every 30rate were recorded. Water intake was also registered basedrate where recorded. Water intake was also registered based

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

276

THERMAL SIGNATURES OF TETHER-CUTTING RECONNECTIONS IN PRE-ERUPTION CORONAL FLUX ROPES: HOT CENTRAL VOIDS IN CORONAL CAVITIES  

SciTech Connect

Using a three-dimensional MHD simulation, we model the quasi-static evolution and the onset of eruption of a coronal flux rope. The simulation begins with a twisted flux rope emerging at the lower boundary and pushing into a pre-existing coronal potential arcade field. At a chosen time the emergence is stopped with the lower boundary taken to be rigid. Then the coronal flux rope settles into a quasi-static rise phase during which an underlying, central sigmoid-shaped current layer forms along the so-called hyperbolic flux tube (HFT), a generalization of the X-line configuration. Reconnections in the dissipating current layer effectively add twisted flux to the flux rope and thus allow it to rise quasi-statically, even though the magnetic energy is decreasing as the system relaxes. We examine the thermal features produced by the current layer formation and the associated 'tether-cutting' reconnections as a result of heating and field aligned thermal conduction. It is found that a central hot, low-density channel containing reconnected, twisted flux threading under the flux rope axis forms on top of the central current layer. When viewed in the line of sight roughly aligned with the hot channel (which is roughly along the neutral line), the central current layer appears as a high-density vertical column with upward extensions as a {sup U-}shaped dense shell enclosing a central hot, low-density void. Such thermal features have been observed within coronal prominence cavities. Our MHD simulation suggests that they are the signatures of the development of the HFT topology and the associated tether-cutting reconnections, and that the central void grows and rises with the reconnections, until the flux rope reaches the critical height for the onset of the torus instability and dynamic eruption ensues.

Fan, Y. [High Altitude Observatory, National Center for Atmospheric Research, 3080 Center Green Drive, Boulder, CO 80301 (United States)

2012-10-10T23:59:59.000Z

277

Our Environment in Hot Water: Comparing Water Heaters, A Life Cycle Approach Comparing Tank and Tankless Water Heaters in California  

E-Print Network (OSTI)

Study on Eco-Design of Water Heaters, Van Holstein en Kemnaand Assessment” in Water Heating Rulemaking TechnicalG. Smith, Tankless Gas Water Heaters: Oregon Market Status,

Lu, Alison

2011-01-01T23:59:59.000Z

278

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

climate zone showed almost 90% thermal acceptabil- ity within the operative temperature ranges prescribed in the ASHRAE

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

279

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

gender, acclimation state, the opportunity to adjust clothing and physical disability on requirements for thermal comfort. Energy

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

280

High performance in low-flow solar domestic hot water systems  

DOE Green Energy (OSTI)

Low-flow solar hot water heating systems employ flow rates on the order of 1/5 to 1/10 of the conventional flow. Low-flow systems are of interest because the reduced flow rate allows smaller diameter tubing, which is less costly to install. Further, low-flow systems result in increased tank stratification. Lower collector inlet temperatures are achieved through stratification and the useful energy produced by the collector is increased. The disadvantage of low-flow systems is the collector heat removal factor decreases with decreasing flow rate. Many solar domestic hot water systems require an auxiliary electric source to operate a pump in order to circulate fluid through the solar collector. A photovoltaic driven pump can be used to replace the standard electrical pump. PV driven pumps provide an ideal means of controlling the flow rate, as pumps will only circulate fluid when there is sufficient radiation. Peak performance was always found to occur when the heat exchanger tank-side flow rate was approximately equal to the average load flow rate. For low collector-side flow rates, a small deviation from the optimum flow rate will dramatically effect system performance.

Dayan, M.

1997-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Evaluation of economics of hotel/motel solar hot water projects  

SciTech Connect

Experience gained by the Ames Laboratory in managing projects in the Solar Hotel/Motel Hot Water initiative is used to evaluate economic factors. The analysis studies costs and trends from a limited number of projects. Initial analysis, based on cost data presented in the project proposals, shows that cost estimates vary widely for various reasons. Further analysis, based on incurred costs as projects are completed, is a continuing process. These actual costs are normalized to the extent possible to provide consistent comparisons between the systems of various projects. Correlations between proposed costs and actual costs are made to assist future evaluation of similar projects. Several projects, which were offered a grant to participate in these Hotel/Motel demonstrations, have declined to accept the grant on economic grounds. Economic analysis of these projects provides rationale for the apparent cost ineffectiveness. Systems now in operation have provided fuel cost savings data which are presented to show system payback periods. Finally, results of economic analysis of these projects are presented together with initial conclusions regarding cost-effective solar hot water system design.

Struss, R.G.; Brohl, E.C.; Sidles, P.H.

1978-01-01T23:59:59.000Z

282

Residential Ground Source Heat Pumps with Integrated Domestic Hot Water Generation: Performance Results from Long-Term Monitoring  

SciTech Connect

Ground source heat pumps (GSHPs) show promise for reducing house energy consumption, and a desuperheater can potentially further reduce energy consumption where the heat pump from the space conditioning system creates hot water. Two unoccupied houses were instrumented to document the installed operational space conditioning and water heating efficiency of their GSHP systems. This paper discusses instrumentation methods and field operation characteristics of the GSHPs, compares manufacturers' values of the coefficients of performance calculated from field measured data for the two GSHPs, and compares the measured efficiency of the desuperheater system to other domestic hot water systems.

Stecher, D.; Allison, K.

2012-11-01T23:59:59.000Z

283

System design package for SIMS Prototype System 4, solar heating and domestic hot water  

DOE Green Energy (OSTI)

This report is a collation of documents and drawings that describe a prototype solar heating and hot water system using air type solar energy collection techniques. The system consists of a modular designed prepackaged solar unit containing solar collctors, a rock storage container, blowers, dampers, ducting, air-to-water heat exchanger, DHW preheat tank, piping and system controls. The system was designed to be installed adjacent to a small single family dwelling. The description, performance specification, subsystem drawings, verification plan/procedure, and hazard analysis of the system are packaged for evaluation of the system with inforation sufficient to assemble a similar system. The prepackage solar unit has been installed at the Mississippi Power and Light Company, Training Facilities, Clinton, Mississippi.

Not Available

1978-11-01T23:59:59.000Z

284

Cold-Climate Solar Domestic Hot Water Systems: Cost/Benefit Analysis and Opportunities for Improvement  

DOE Green Energy (OSTI)

To determine potential for reduction in the cost of saved energy (COSE) for cold-climate solar domestic hot water (SDHW) systems, COSE was computed for three types of cold climate water heating systems. For each system, a series of cost-saving measures was considered: (1) balance of systems (BOS): tank, heat exchanger, and piping-valving measures; and (2) four alternative lower-cost collectors. Given all beneficial BOS measures in place, >50% reduction of COSE was achievable only with selective polymer collectors at half today's selective collector cost. In all three system types, today's metal-glass selective collector achieved the same COSE as the hypothesized non-selective polymer collector.

Burch, J.; Hillman, T.; Salasovich, J.

2005-01-01T23:59:59.000Z

285

Regulatory, Land Ownership, and Water Availability Factors for a Magma Well: Long Valley Caldera and Coso Hot Springs, California  

DOE Green Energy (OSTI)

The U.S. Department of Energy is currently engaged in a program to demonstrate the engineering feasibility of extracting thermal energy from high-level molten magma bodies. The program is being carried out under the direction of Sandia National Laboratories where a number of individual projects support the overall program. The existing program elements include (1) high-temperature materials compatibility testing; (2) studies of properties of melts of various compositions; and (3) the investigation of the economics of a magma energy extraction system. Another element of the program is being conducted with the cooperation of the U.S. Geological Survey, and involves locating and outlining magma bodies at selected sites using various geophysical techniques. The ultimate goal here will be to define the limits of a magma body as a drilling target. During an earlier phase of the program, more than twenty candidate study sites considered were evaluated based upon: (1) the likelihood of the presence of a shallow magma chamber, (2) the accessibility of the site, and (3) physical and institutional constraints associated with each site with respect to performing long-term experiments. From these early phase activities, the number of candidate sites were eventually narrowed to just 2. The sites currently under consideration are Coso Hot Springs and the Long Valley caldera (Figure 1). This report describes certain attributes of these sites in order to help identify potential problems related to: (1) state and federal regulations pertaining to geothermal development; (2) land ownership; and (3) water resource availability. The information sources used in this study were mainly maps, publications, and informative documents gathered from the California Division of Oil and Gas and the U.S. Department of the Interior. Environmental studies completed for the entire Long Valley caldera study area, and for portions of the Coso Hot Springs study area were also used for reference.

Blackett, Robert

1985-09-01T23:59:59.000Z

286

Beppu hot springs  

SciTech Connect

Beppu is one of the largest hot springs resorts in Japan. There are numerous fumaroles and hot springs scattered on a fan-shaped area, extending 5 km (3.1 miles) from east to west and 8 km (5.0 miles) from north to south. Some of the thermal manifestations are called {open_quotes}Jigoku (Hells){close_quotes}, and are of interest to visitors. The total amount of discharged hot springs water is estimated to be 50,000 ton/day (9,200 gpm) indicating a huge geothermal system. The biggest hotel in Beppu (Suginoi Hotel) installed a 3-MW geothermal power plant in 1981 to generate electricity for its own private use.

Taguchi, Schihiro [Fukuoka Univ. (Japan); Itoi, Ryuichi [Kyushu Univ., Kasuga (Japan); Yusa, Yuki [Kyoto Univ., Beppu (Japan)

1996-05-01T23:59:59.000Z

287

Standard Guide for On-Site Inspection and Verification of Operation of Solar Domestic Hot Water Systems  

E-Print Network (OSTI)

1.1 This guide covers procedures and test methods for conducting an on-site inspection and acceptance test of an installed domestic hot water system (DHW) using flat plate, concentrating-type collectors or tank absorber systems. 1.2 It is intended as a simple and economical acceptance test to be performed by the system installer or an independent tester to verify that critical components of the system are functioning and to acquire baseline data reflecting overall short term system heat output. 1.3 This guide is not intended to generate accurate measurements of system performance (see ASHRAE standard 95-1981 for a laboratory test) or thermal efficiency. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine th...

American Society for Testing and Materials. Philadelphia

1987-01-01T23:59:59.000Z

288

Application of solar energy to the supply of industrial hot water. Technical report 3  

SciTech Connect

A solar water heating and steam generating system is being developed for a California laundry. Progress reported includes accumulation of data on process usage and demands for the purpose of collector sizing, studies of insulation for piping and thermal storage tanks, investigation in the selection of the heat transfer fluid, and weather measurements. Further analyses on the supporting structure for the solar collector arrays are reported. A concept review meeting is discussed. (LEW)

1976-08-01T23:59:59.000Z

289

U.S. Marine Corps Base Camp Pendleton: Using The Sun For Hot Water And Electricity, Federal Energy Management Program (FEMP) (Fact Sheet)  

DOE Green Energy (OSTI)

Case study overview of integrated solar hot water/photovoltaic systems at the U.S. Marine Corps Camp Pendleton training pools.

Not Available

2009-09-01T23:59:59.000Z

290

Proposal for the Purchase, Without a Call for Tenders, of a Medium-Temperature Hot Water Boiler for the 300 GeV Accelerator  

E-Print Network (OSTI)

Proposal for the Purchase, Without a Call for Tenders, of a Medium-Temperature Hot Water Boiler for the 300 GeV Accelerator

1976-01-01T23:59:59.000Z

291

American Recovery and Reinvestment Act (ARRA) Federal Energy Management Program Technical Assistance Project 281 Solar Hot Water Application Assessment for U.S. Army IMCOM-Southeast Region  

SciTech Connect

The Energy Independence and Security Act of 2007 requires installations (EISA) to install solar systems of sufficient capacity to provide 30% of service hot water in new construction and renovations where cost-effective. However, installations are struggling with how to implement solar hot water, and while several installations are installing solar hot water on a limited basis, paybacks remain long. Pacific Northwest National Laboratory (PNNL) was tasked to address this issue to help determine how best to implement solar hot water projects. This documents discusses the results of that project.

Russo, Bryan J.; Chvala, William D.

2010-09-30T23:59:59.000Z

292

Solar heating and hot water system installed at Southeast of Saline, Unified School District 306, Mentor, Kansas  

DOE Green Energy (OSTI)

A cooperative agreement was negotiated in April 1978 for the installation of a space and domestic hot water system at Southeast of Saline, Kansas Unified School District 306, Mentor, Kansas. The solar system was installed in a new building and was designed to provide 52 percent of the estimated annual space heating load and 84 percent of the estimated annual potable hot water requirement. The collectors are liquid flat plate. They are ground-mounted and cover a total area of 5125 square feet. The system will provide supplemental heat for the school's closed-loop water-to-air heat pump system and domestic hot water. The storage medium is water inside steel tanks with a capacity of 11,828 gallons for space heating and 1,600 gallons for domestic hot water. This final report, which describes in considerable detail the solar heating facility, contains detailed drawings of the completed system. The facility was declared operational in September 1978, and has functioned successfully since.

Not Available

1979-07-01T23:59:59.000Z

293

Our Environment in Hot Water: Comparing Water Heaters, A Life Cycle Approach Comparing Tank and Tankless Water Heaters in California  

E-Print Network (OSTI)

heater storage tank wastes energy to continuous heating.fired water heater Total Energy Total Waste Emissions (Air)fired water heater Total Energy Total Waste Emissions (Air)

Lu, Alison

2011-01-01T23:59:59.000Z

294

Sizing a water softener for aquifer thermal energy storage  

DOE Green Energy (OSTI)

In aquifer thermal energy storage (ATES) installations, ground water is circulated between an aquifer and heat exchangers via a well field. It is often necessary to soften the water to prevent carbonate scaling in pipes, heat exchangers, and well screens. Most ATES projects requiring water softening will be best served by using synthetic ion-exchange resins. The size of the resin beds, the resin regeneration cycle, and the amount of NaCl brine used in each regeneration depend on several factors. These are (1) the chemistry of the native ground water, (2) allowable residual hardness after softening, (3) the maximum flow rate of water through the ATES plant, and (4) exchange characteristics of the resin. Example calculations are given for a three-bed water softening system.

Hall, S.H.; Jenne, E.A.

1993-03-01T23:59:59.000Z

295

Analysis of space heating and domestic hot water systems for energy-efficient residential buildings  

DOE Green Energy (OSTI)

An analysis of the best ways of meeting the space heating and domestic hot water (DHW) needs of new energy-efficient houses with very low requirements for space heat is provided. The DHW load is about equal to the space heating load in such houses in northern climates. The equipment options which should be considered are discussed, including new equipment recently introduced in the market. It is concluded that the first consideration in selecting systems for energy-efficient houses should be identification of the air moving needs of the house for heat distribution, heat storage, ventilation, and ventilative cooling. This is followed, in order, by selection of the most appropriate distribution system, the heating appliances and controls, and the preferred energy source, gas, oil, or electricity.

Dennehy, G

1983-04-01T23:59:59.000Z

296

Solar heating and hot water system for the central administrative office facility. Technical progress report  

DOE Green Energy (OSTI)

Progress on the solar heating and hot water system for the central administrative office facility of the Lincoln Housing Authority, Lincoln, NE is covered. An acceptance test plan is presented and the results of the test are tabulated. A complete blueprint of the system as built is provided. The monitoring system is drawn and settings and installation are described. An operation and maintenance manual discusses procedures for start up, shut down and seasonal changeover and include a valve list and pictures and specifications of components and materials used. Photographs of the final installation are included, and technical data and performance data are given. Finally, there is a brief description of system design and operation and a discussion of major maintenance problems encountered and their solutions. (LEW)

Not Available

1978-11-01T23:59:59.000Z

297

Assembly and comparison of available solar hot water system reliability databases and information.  

DOE Green Energy (OSTI)

Solar hot water (SHW) systems have been installed commercially for over 30 years, yet few quantitative details are known about their reliability. This report describes a comprehensive analysis of all of the known major previous research and data regarding the reliability of SHW systems and components. Some important conclusions emerged. First, based on a detailed inspection of ten-year-old systems in Florida, about half of active systems can be expected to fail within a ten-year period. Second, valves were identified as the probable cause of a majority of active SHW failures. Third, passive integral and thermosiphon SHW systems have much lower failure rates than active ones, probably due to their simple design that employs few mechanical parts. Fourth, it is probable that the existing data about reliability do not reveal the full extent of fielded system failures because most of the data were based on trouble calls. Often an SHW system owner is not aware of a failure because the backup system silently continues to produce hot water. Thus, a repair event may not be generated in a timely manner, if at all. This final report for the project provides all of the pertinent details about this study, including the source of the data, the techniques to assure their quality before analysis, the organization of the data into perhaps the most comprehensive reliability database in existence, a detailed statistical analysis, and a list of recommendations for additional critical work. Important recommendations include the inclusion of an alarm on SHW systems to identify a failed system, the need for a scientifically designed study to collect high-quality reliability data that will lead to design improvements and lower costs, and accelerated testing of components that are identified as highly problematic.

Menicucci, David F. (Building Specialists, Inc., Albuquerque, NM)

2009-05-01T23:59:59.000Z

298

Feasibility Study for Photovoltaics, Wind, solar Hot Water and Hybrid Systems  

DOE Green Energy (OSTI)

Southwestern Indian Polytechnic Institute (SIPI) located in Albuquerque New Mexico is a community college that serves American Indians and Alaska Natives. SIPI’s student body represents over 100 Native American Tribes. SIPI completed a renewable energy feasibility study program and established renewable energy hardware on the SIPI campus, which supplements and creates an educational resource to teach renewable energy courses. The SIPI campus is located, and has as student origins, areas, in which power is an issue in remote reservations. The following hardware was installed and integrated into the campus facilities: small wind turbine, large photovoltaic array that is grid-connected, two photovoltaic arrays, one thin film type, and one polycrystalline type, one dual-axis active tracker and one passive tracker, a hot air system for heating a small building, a portable hybrid photovoltaic system for remote power, and a hot water system to preheat water used in the SIPI Child Care facility. Educational curriculum has been developed for two renewable energy courses one being the study of energy production and use, and especially the roles renewable energy forms like solar, wind, geothermal, hydro, and biomass plays, and the second course being a more advanced in-depth study of renewable energy system design, maintenance, installation, and applications. Both courses rely heavily on experiential learning techniques so that installed renewable energy hardware is continuously utilized in hand-on laboratory activities and are part of the Electronics program of studies. Renewable energy technologies and science has also been included in other SIPI programs of study such as Environmental Science, Natural Resources, Agriculture, Engineering, Network Management, and Geospatial Technology.

Hooks, Ronald; Montoya, Valerie

2008-03-26T23:59:59.000Z

299

Applicability of Related Data, Algorithms, and Models to the Simulation of Ground-Coupled Residential Hot Water Piping in California  

SciTech Connect

Residential water heating is an important consideration in California?s building energy efficiency standard. Explicit treatment of ground-coupled hot water piping is one of several planned improvements to the standard. The properties of water, piping, insulation, backfill materials, concrete slabs, and soil, their interactions, and their variations with temperature and over time are important considerations in the required supporting analysis. Heat transfer algorithms and models devised for generalized, hot water distribution system, ground-source heat pump and ground heat exchanger, nuclear waste repository, buried oil pipeline, and underground electricity transmission cable applications can be adapted to the simulation of under-slab water piping. A numerical model that permits detailed examination of and broad variations in many inputs while employing a technique to conserve computer run time is recommended.

Warner, J.L.; Lutz, J.D.

2006-01-01T23:59:59.000Z

300

Application of solar energy to the supply of industrial process hot water. Aerotherm final report, 77-235. [Can washing in Campbell Soup plant  

DOE Green Energy (OSTI)

The objectives of the Solar Industrial Process Hot Water Program are to design, test, and evaluate the application of solar energy to the generation and supply of industrial process hot water, and to provide an assessment of the economic and resource benefits to be gained. Other objectives are to stimulate and give impetus to the use of solar energy for supplying significant amounts of industrial process heat requirements. The plant selected for the design of a solar industrial process hot water system was the Campbell Soup facility in Sacramento, California. The total hot water demand for this plant varies between 500 and 800 gpm during regular production shifts, and hits a peak of over 1,000 gpm for approximately one hour during the cleanup shift. Most of the hot water is heated in the boiler room by a combination of waste heat recovery and low pressure (5 psi) steam-water heat exchangers. The hot water emerges from the boiler room at a temperature between 160/sup 0/F and 180/sup 0/F and is transported to the various process areas. Booster heaters in the process areas then use low pressure (5 psi) or medium pressure (20 psi) steam to raise the temperature of the water to the level required for each process. Hot water is used in several processes at the Campbell Soup plant, but the can washing process was selected to demonstrate the feasibility of a solar hot water system. A detailed design and economic analysis of the system is given. (WHK)

None

1977-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Analysis and thermal-design improvements of downhole tools for use in hot-dry wells  

DOE Green Energy (OSTI)

Design improvements made for downhole thermal protection of systems based on results obtained from the analysis of the electronics, heat sink, and dewar packaged in a steel tubular body are described. Results include heat flux at the tool surface, temperature-time histories of each subsystem and isotherm contour plots during the simulation. The analysis showed that the thermal potential between the electronics and the heat sink was in the wrong direction and also was too small to remove heat entering the electronics section. Also, the conductance of the available heat transfer paths from electronics to heat sink was too small to remove that heat efficiently. Significant improvements in survival at high temperatures were achieved by increasing the available thermal capacity of the heat sink, increasing the thermal potential between the heat sink and electronics, and vastly increasing the conductance of the heat transfer paths.

Bennett, G.A.; Sherman, G.R.

1983-02-01T23:59:59.000Z

302

Violent Reactions and DDT in Hot, Thermally Damaged HMX-Based PBXs  

SciTech Connect

Conventional high explosives (e.g. PBX 9501, LX-07) have been observed to react violently following thermal insult: (1) Fast convective and compressive burns (HEVR); (2) Thermal explosions (HEVR); and (3) Deflagration-to-detonation transition (DDT). No models exist that sufficiently capture/predict these complex multiphase and multiscale behaviors. For now, research is focused on identifying vulnerabilities and factors that control this behavior.

Parker, Gary R. Jr. [Los Alamos National Laboratory; Holmes, Matthew D. [Los Alamos National Laboratory; Dickson, Peter [Los Alamos National Laboratory; Asay, Blaine W. [Los Alamos National Laboratory; McAfee, John M. [Los Alamos National Laboratory

2012-07-03T23:59:59.000Z

303

Thermal Performance of Unvented Attics in Hot-Dry Climates: Results from Building America; Preprint  

DOE Green Energy (OSTI)

Unvented attics have become a more common design feature implemented by Building America partners in hot-dry climates of the United States. More attention is being focused on how this approach affects heating and cooling energy consumption. By eliminating the ridge and eave vents that circulate outside air through the attic and by moving the insulation from the attic floor to the underside of the roof, an unvented attic become a semi-conditioned space, creating a more benign environment for space conditioning ducts.

Hendron, R.; Farrar-Nagy, S.; Anderson, R.; Reeves, P.; Hancock, E.

2003-01-01T23:59:59.000Z

304

Hot Thermal Storage/Selective Energy System Reduces Electric Demand for Space Cooling As Well As Heating in Commercial Application  

E-Print Network (OSTI)

Based on an experimental residential retrofit incorporating thermal storage, and extensive subsequent modeling, a commercial design was developed and implemented to use hot thermal storage to significantly reduce electric demand and utility energy costs during the cooling season as well as the heating season. To achieve air conditioning savings, the system separates dehumidification from sensible cooling; dehumidifies by desiccant absorption, using heat from storage to dry the desiccant; and then cools at an elevated temperature improving overall system efficiency. Efficient heat for desiccant regeneration is provided by a selective-energy system coupled with thermal storage. The selective-energy system incorporates diesel cogeneration, solar energy and off-peak electric resistance heating. Estimated energy and first cost savings, as compared with an all-electric VAV HVAC system, are: 30 to 50% in ductwork size and cost; 30% in fan energy; 25% in air handling equipment; 20 to 40% in utility energy for refrigeration; 10 to 20% in refrigeration equipment; and space savings due to smaller ductwork and equipment.

Meckler, G.

1985-01-01T23:59:59.000Z

305

Stratigraphy and alteration, 15 shallow thermal gradient holes, Roosevelt Hot Springs KGRA and vicinity, Millard and Beaver Counties, Utah  

DOE Green Energy (OSTI)

Fifteen shallow thermal gradient drill holes were recently completed by Geothermal Power Corporation (GPCR) in the vicinity of the Roosevelt Hot Springs KGRA. Five holes penetrated Tertiary granitic rocks and Precambrian gneiss east of the KGRA. Seven holes completed entirely in alluvium near the southwestern corner of the KGRA encountered a near-surface marker horizon of Pleistocene pumice and perlite. Maximum calculated alluvial sedimentation rates since initial deposition of this pumice and perlite range from 1 foot in 12,500 years to 1 foot in 2,300 years. Three holes east of the Mineral Mountains penetrated late Cenozoic basaltic andesite beneath a thin veneer of alluvium. All 15 GPCR drill holes appear to be peripheral to a central zone of anomalously high thermal gradient and low resisitivity delineated by previous investigations. GPCR-8 and -14, however, are characterized by high heat flow and relatively abundant manganese oxide mineralization, which may reflect a favorable hydrologic system controlling thermal fluid flow at depth. These holes thus seem most encouraging for discovery of a deeper high-temperature geothermal resource.

Hulen, J.B.

1978-09-01T23:59:59.000Z

306

Thermal Performance of Building Envelope in Very Hot Dry Desert Region in Egypt (Toshky)  

E-Print Network (OSTI)

Toshky region is a desert region located in the south east of Egyptian western desert at the Tropical Cancer (23.5 N). The following features characterized this region during the summer season; aridity, high summer day time temperatures reaches to above 40 C for about 6 hours, large diurnal temperature variation, low relative humidity, and high solar radiation reaches to about 1100W/m2 on horizontal surfaces. In such climate thermal human comfort is crucial to provide the reasonable environment for the people. As the building envelop has a major role in saving comfort for people and improve the consumption of energy in building. So this study is interested in studying the thermal performance for some building constructed from different building materials as; Nobaa sandstone, hollow clay brick, light sand block, and hollow and insulated bazelt blocks. The external climatic conditions and the temperature distribution inside the wall construction and the indoor air temperature were measured. The result shows that using Nobaa sandstone alone in building is not adequate with the external climatic conditions of this region. But using building materials with specific thermal characteristics, and using thermal insulation led to reduce the heat flow through the walls and help the building to be suitable with its external environment conditions. The study also show that hollow clay brick and light sand block valid the lowest indoor air temperature, and the thermal performance of hollow bazelt blocks can be improved by using thermal insulation, Natural and forced night ventilation help the indoor environment to be within the thermal comfort.

Khalil, M. H.; Sheble, S. S.; Helal, M. A.; El-Demirdash, M.

2010-01-01T23:59:59.000Z

307

The integration of water loop heat pump and building structural thermal storage systems  

SciTech Connect

Commercial buildings often have extensive periods where one space needs cooling and another heating. Even more common is the need for heating during one part of the day and cooling during another in the same spaces. If a building's heating and cooling system could be integrated with the building's structural mass such that the mass can be used to collect, store, and deliver energy, significant energy might be saved. Computer models were developed to simulate this interaction for an existing office building in Seattle, Washington that has a decentralized water-source heat pump system. Metered data available for the building was used to calibrate a base'' building model (i.e., nonintegrated) prior to simulation of the integrated system. In the simulated integration strategy a secondary water loop was manifolded to the main HVAC hydronic loop. tubing in this loop was embedded in the building's concrete floor slabs. Water was routed to this loop by a controller to charge or discharge thermal energy to and from the slabs. The slabs were also in thermal communication with the conditioned spaces. Parametric studies of the building model, using weather data for five other cities in addition to Seattle, predicted that energy can be saved on cooling dominated days. On hot, dry days and during the night the cooling tower can beneficially be used as a free cooling'' source for thermally charging'' the floor slabs using cooled water. Through the development of an adaptive/predictive control strategy, annual HVAC energy savings as large as 30% appear to be possible in certain climates. 8 refs., 13 figs.

Marseille, T.J.; Schliesing, J.S.

1990-09-01T23:59:59.000Z

308

Super-hot (T > 30 MK) Thermal Plasma in Solar Flares  

E-Print Network (OSTI)

The Sun offers a convenient nearby laboratory to study the physical processes of particle acceleration and impulsive energy release in magnetized plasmas that occur throughout the universe, from planetary magnetospheres to black hole accretion disks. Solar flares are the most powerful explosions in the solar system, releasing up to 10^32-10^33 ergs over only 100-1,000 seconds, accelerating electrons up to hundreds of MeV and heating plasma to tens of MK. The accelerated electrons and the hot plasma each contain tens of percent of the total flare energy, indicating an intimate link between particle acceleration, plasma heating, and flare energy release. The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observes the X-ray emission from these processes from ~3 keV to ~17 MeV with unprecedented spectral, spatial, and temporal resolution. RHESSI observations show that "super-hot" (>30 MK) plasma temperatures are achieved almost exclusively by intense, GOES X-class flares and appear to be strictly a...

Caspi, Amir

2011-01-01T23:59:59.000Z

309

Improving thermosyphon solar domestic hot water system model performance. Final report, March 1994--February 1995  

DOE Green Energy (OSTI)

Data from an indoor solar simulator experimental performance test is used to develop a systematic calibration procedure for a computer model of a thermosyphoning, solar domestic hot water heating system with a tank-in-tank heat exchanger. Calibration is performed using an indoor test with a simulated solar collector to adjust heat transfer in the heat exchanger and heat transfer between adjacent layers of water in the storage tank. An outdoor test is used to calibrate the calculation of the friction drop in the closed collector loop. Additional indoor data with forced flow in the annulus of the heat exchanger leads to improved heat transfer correlations for the inside and outside regions of the tank-in-tank heat exchanger. The calibrated simulation model is compared to several additional outdoor tests both with and without auxiliary heating. Integrated draw energies are predicted with greater accuracy and draw temperature profiles match experimental results to a better degree. Auxiliary energy input predictions improve significantly. 63 figs., 29 tabs.

Swift, T.N.

1996-09-01T23:59:59.000Z

310

THEORETICAL STUDIES IN LONG-TERM THERMAL ENERGY STORAGE IN AQUIFERS  

E-Print Network (OSTI)

Aquifer Storage of Hot Water from Solar Energy Collectors.of International Solar Energy Congress, New Delhi, India.Thermal Storage of Solar Energy 11 , Amsterdam, The

Tsang, C.F.

2013-01-01T23:59:59.000Z

311

Performance of a Heat Pump Water Heater in the Hot-Humid Climate, Windermere, Florida (Fact Sheet)  

SciTech Connect

Over recent years, heat pump water heaters (HPWHs) have become more readily available and more widely adopted in the marketplace. For a 6-month period, the Building America team Consortium for Advanced Residential Buildings monitored the performance of a GE Geospring HPWH in Windermere, Florida. The study found that the HPWH performed 144% more efficiently than a traditional electric resistance water heater, saving approximately 64% on water heating annually. The monitoring showed that the domestic hot water draw was a primary factor affecting the system's operating efficiency.

Metzger, C.; Puttagunta, S.; Williamson, J.

2013-11-01T23:59:59.000Z

312

Thermal Comfort Study in a Naturally Ventilated Residential Building in a Tropical Hot-Humid Climate Region  

E-Print Network (OSTI)

This paper presents a thermal comfort study in a naturally ventilated residential building located in a tropical hot-humid climate region. The specific objective of this study is to investigate whether thermal comfort in this house can be achieved through a passive system only. The methods used in this study included conducting hourly monitoring of the temperature and relative humidity; measuring the air velocities; and assessing occupants' thermal sensations through questionnaires and interview. The data from the questionnaires were matched to the monitored data to assess the acceptable range of comfortable condition. Then using an hourly simulation program, some components of the building were also "modified" to investigate whether the building can be made "more comfortable". This study shows that it is possible to provide a thermally comfortable space in this region without using mechanical air-conditioning systems. The occupants' acceptable range of comfortable condition is different than that of people in the northern latitudes. The occupants sensed "neutrality" when the operative temperature in the house was about 27 degree Celsius (80°F). The occupants could also tolerate slightly warm conditions, that is up to 29 degree Celsius (84OF), and still never wanted to install any air-conditioning systems. The simulation showed that using light wall materials would result in cooler indoor temperature at night but warmer during the day. If all windows were opened (25% the total floor area) the house could be more comfortable at night but less comfortable during the day. Findings of this study are important for architects and engineers in designing comfortable living spaces in these regions.

Soebarto, V. I.; Handjarinto, S.

1998-01-01T23:59:59.000Z

313

Geothermal investigations in Idaho. Part 7. Geochemistry and geologic setting of the thermal waters of the Camas Prairie area, Blaine and Camas Counties, Idaho  

DOE Green Energy (OSTI)

The thermal waters of the east-west trending intermontane basin making up the Camas Prairie area were sampled during the fall of 1973. Average ground water temperature is 15/sup 0/C (10/sup 0/C above mean annual temperature). The thermal waters, chemically similar to thermal waters discharging from granitic rocks elsewhere in Idaho, have high pH, high Na/K and Na/Ca ratios, and high fluoride content. They are low in total dissolved solids (less than 365 mg/l), low in chloride, and exhibit relatively constant chloride/fluoride ratios and silica concentrations. Geochemical thermometers are interpreted to indicate that maximum aquifer temperatures in the Camas Prairie Basin are only about 100/sup 0/C, although higher temperatures were predicted by the quartz equilibrium geochemical thermometer and mixing models. The Magic Hot Springs well, located near the north shore of the Magic Reservoir at Hot Springs Landing, is an exception to these general conclusions. These waters may be circulating to depths approaching 1,800 to 2,500 m along faults or fissures; or may be due to leakage from an aquifer or reservoir heated by a shallow heat source, related perhaps to the Holocene basalt flows south of Magic Reservoir. These waters are nearly neutral in pH, are much higher in dissolved solids, exhibit higher chloride/fluoride, chloride/carbonate plus bicarbonate, and chloride/sulfate ratios, and are, in general, chemically dissimilar to thermal waters elsewhere in the area. Temperatures predicted by geochemical thermometers are thought to indicate that Magic Hot Springs well waters are ascending from an aquifer or reservoir with temperatures from 140/sup 0/ to 200/sup 0/C. Temperatures in this range would be sufficient for application in many industrial processes, including power generation, should sufficient water be available.

Mitchell, J.C.

1976-09-01T23:59:59.000Z

314

An overview of water disinfection in developing countries and the potential for solar thermal water pasteurization  

DOE Green Energy (OSTI)

This study originated within the Solar Buildings Program at the U.S. Department of Energy. Its goal is to assess the potential for solar thermal water disinfection in developing countries. In order to assess solar thermal potential, the alternatives must be clearly understood and compared. The objectives of the study are to: (a) characterize the developing world disinfection needs and market; (b) identify competing technologies, both traditional and emerging; (c) analyze and characterize solar thermal pasteurization; (d) compare technologies on cost-effectiveness and appropriateness; and (e) identify research opportunities. Natural consequences of the study beyond these objectives include a broad knowledge of water disinfection problems and technologies, introduction of solar thermal pasteurization technologies to a broad audience, and general identification of disinfection opportunities for renewable technologies.

Burch, J.; Thomas, K.E.

1998-01-01T23:59:59.000Z

315

Reducing Thermal Losses and Gains With Buried and Encapsulated Ducts in Hot-Humid Climates  

SciTech Connect

The Consortium for Advanced Residential Buildings (CARB) monitored three houses in Jacksonville, FL, to investigate the effectiveness of encapsulated and encapsulated/buried ducts in reducing thermal losses and gains from ductwork in unconditioned attics. Burying ductwork beneath loose-fill insulation has been identified as an effective method of reducing thermal losses and gains from ductwork in dry climates, but it is not applicable in humid climates where condensation may occur on the outside of the duct jacket. By encapsulating the ductwork in closed cell polyurethane foam (ccSPF) before burial beneath loose-fill mineral fiber insulation, the condensation potential may be reduced while increasing the R-value of the ductwork.

Shapiro, C.; Magee, A.; Zoeller, W.

2013-02-01T23:59:59.000Z

316

Thermal and Non-thermal Physiochemical Processes in Nanoscale Films of Amorphous Solid Water  

SciTech Connect

Amorphous solid water (ASW) is a metastable form of water created by vapor deposition onto a cold substrate (typically less than 130 K). Since this unusual form of water only exists on earth in laboratories with highly specialized equipment, it is fair to ask why there is any interest in studying this esoteric material. Much of the scientific interest involves using ASW as a model system to explore the physical and reactive properties of liquid water and aqueous solutions. Other researchers are interested in ASW because it is believed to be the predominate form of water in the extreme cold temperatures found in many astrophysical and planetary environments. In addition, ASW is a convenient model system for studying the stability of metastable systems (glasses) and the properties of highly porous materials. A fundamental understanding of such properties has applications in a diverse range of disciplines including cryobiology, food science, pharmaceuticals, astrophysics and nuclear waste storage among others.There exist several excellent reviews on the properties of ASW and supercooled liquid water and a new comprehensive review is beyond the scope of this Account. Instead, we focus on our research over the past 15 years using molecular beams and surface science techniques to probe the thermal and non thermal properties of nanoscale films of ASW. We use molecular beams to precisely control the deposition conditions (flux, incident, energy, incident angle) to create compositionally-tailored, nanoscale films of ASW at low temperatures. To study the transport properties (viscosity, diffusivity), the amorphous films can be heated above their glass transition temperatures, Tg, at which time they transform into deeply supercooled liquids prior to crystallization. The advantage of this approach is that at temperatures near Tg the viscosity is approximately 15 orders of magnitude larger than a normal liquid, and therefore the crystallization kinetics are dramatically slowed, increasing the time available for experiments. For example, near Tg, on a typical laboratory time scale (e.g. {approx}1000 s), a water molecule moves less than a molecular distance. For this reason, nanoscale films help to probe the behavior and reactions of supercooled liquid at these low temperatures. ASW films can be used for investigating the non-thermal reactions relevant to radiolysis. In this account we will present a survey of our research on the thermal and non thermal properties of ASW using this approach.

Smith, R. Scott; Petrik, Nikolay G.; Kimmel, Gregory A.; Kay, Bruce D.

2012-01-17T23:59:59.000Z

317

Induced-polarization measurements at Roosevelt Hot Springs Thermal area, Utah  

DOE Green Energy (OSTI)

An induced polarization survey was conducted at Roosevelt Hot Springs, using the dipole-dipole array. The survey consisted of two profile lines, one across the southern end of the system (2200N) and another across the northern portion (5950N). A total of 15 line-km of profiles was run, with 100 m and 300 m dipoles out to n spacings of 4 to 6. Apparent resistivity amplitude and phase data were gathered with a phase-sensitive receiver at frequencies between 32 Hz and 1/256 Hz. The data are presented in the form of apparent resistivity of phase pseudosections. Induced polarization effects in geothermal environments can result from clays and pyrite which are associated with hydrothermal alteration. Laboratory measurements on altered material show some induced polarization effects at frequencies below 1 Hz which are thought to be due to pyrite. A higher frequency polarization (> 1 Hz) is attributed to the effects of clays. The primary purpose of this survey was to investigate the feasibility of mapping clay alteration zones, and separating them from other conductive features, by making use of their polarization characteristics. The field data show some small, low frequency phase anomalies which may be the result of pyrite deposition. The higher frequencies show considerable phase effects, which can be the result of clays, but the effects of electromagnetic coupling have not, as yet, been assessed.

Chu, J.J.; Sill, W.R.; Ward, S.H.

1979-06-01T23:59:59.000Z

318

Variance-reduction technique for Coulomb-nuclear thermalization of energetic fusion products in hot plasmas  

SciTech Connect

A variance-reduction technique involving use of exponential transform and angular-biasing methods has been developed. Its purpose is to minimize the variance and computer time involved in estimating the mean fusion product (fp) energy deposited in a hot, multi-region plasma under the influence of small-energy transfer Coulomb collisions and large-energy transfer nuclear elastic scattering (NES) events. This technique is applicable to high-temperature D-/sup 3/He, Cat. D and D-T plasmas which have highly energetic fps capable of undergoing NES. A first application of this technique is made to a D-/sup 3/He Field Reversed Mirror (FRM) where the Larmor radius of the 14.7 MeV protons are typically comparable to the plasma radius (plasma radius approx. 2 fp gyroradii) and the optimistic fp confinement (approx. 45% of 14.7 MeV protons) previously predicted is vulnerable to large orbit perturbations induced by NES. In the FRM problem, this variance reduction technique is used to estimate the fractional difference in the average fp energy deposited in the closed-field region, E/sub cf/, with and without NES collisions.

DeVeaux, J.C.; Miley, G.H.

1982-01-01T23:59:59.000Z

319

New and retrofit solar hot water installations in Florida, January--June 1977  

SciTech Connect

The purpose of this project was to ascertain the number of solar hot water installations in new buildings versus the number retrofitted to existing buildings in Florida during the January to June period of 1977. The methodology was to survey all installations started, in progress, or completed during that period. A by-product of the survey is a comprehensive list of manufacturers and another of distributors and installers in Florida. The survey excludes space heating and cooling and pool heating applications. However, the latter is being considered for a separate survey. Installations included are in the single-family and multi-family residential, commercial, industrial and public sectors. In the single-family residential sector, care has been taken to determine a new or retrofit breakdown, average square footage of collector per installation, average cost per square foot of collector in Florida, and subsequently, using F-CHART and system sizing programs developed at the Center, the fraction of load supplied by solar and its equivalent barrels of oil saved per year. In the multi-family residential, commercial, industrial and public sectors, specific information on each installation has been provided. This information includes new or retrofit, ownership, type of collector and manufacturer, square footage of installation, design percentage energy by solar, suxiliary fuel, system cost, and federal grants, if any.

1978-04-01T23:59:59.000Z

320

Low-Cost Solar Domestic Hot Water Systems for Mild Climates  

DOE Green Energy (OSTI)

In FY99, Solar Heating and Lighting set the goal to reduce the life-cycle cost of saved-energy for solar domestic hot water (SDHW) systems in mild climates by 50%, primarily through use of polymer technology. Two industry teams (Davis Energy Group/SunEarth (DEG/SE) and FAFCO) have been developing un-pressurized integral-collector-storage (ICS) systems having load-side heat exchangers, and began field-testing in FY04. DEG/SE?s ICS has a rotomolded tank and thermoformed glazing. Based upon manufacturing issues, costs, and poor performance, the FAFCO team changed direction in late FY04 from an un-pressurized ICS to a direct thermosiphon design based upon use of pool collectors. Support for the teams is being provided for materials testing, modeling, and system testing. New ICS system models have been produced to model the new systems. A new ICS rating procedure for the ICS systems is undergoing testing and validation. Pipe freezing, freeze protection valves, and overheating have been tested and analyzed.

Burch, J.; Christensen, C.; Merrigan, T.; Hewett, R.; Jorgensen, G.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Annual fuel usage charts for oil-fired boilers. [Building space heating and hot water supplies  

SciTech Connect

On the basis of laboratory-determined boiler efficiency data, one may calculate the annual fuel usage (AFU) for any oil-fired boiler, serving a structure of a given design heat load, for any specified hourly weather pattern. Further, where data are available regarding the energy recapture rates of the strucutre due to direct gain solar energy (windows), lighting, cooking, electrical appliances, metabolic processes, etc., the annual fuel usage savings due to such (re) capture are straightforwardly determinable. Employing the Brookhaven National Laboratory annual fuel usage formulation, along with efficiency data determined in the BNL Boiler Laboratory, computer-drawn annual fuel usage charts can be generated for any selected boiler for a wide range of operating conditions. For two selected boilers operating in any one of the hour-by-hour weather patterns which characterize each of six cities over a wide range of firing rates, domestic hot water consumption rates, design heat loads, and energy (re) capture rates, annual fuel usages are determined and graphically presented. Figures 1 to 98, inclusive, relate to installations for which energy recapture rates are taken to be zero. Figures 97 to 130, inclusive, apply to a range of cases for which energy recapture rates are nonzero and determinable. In all cases, simple, direct and reliable annual fuel usage values can be determined by use of charts and methods such as those illustrated.

Berlad, A.L.; Yeh, Y.J.; Salzano, F.J.; Hoppe, R.J.; Batey, J.

1978-07-01T23:59:59.000Z

322

Building Design and Operation for Improving Thermal Comfort in Naturally Ventilated Buildings in a Hot-Humid Climate  

E-Print Network (OSTI)

The goal of this research was to develop new techniques for designing and operating unconditioned buildings in a hot-humid climate that could contribute to an improvement of thermal performance and comfort condition. The recommendations proposed in this research will also be useful for facility managers on how to maintain unconditioned buildings in this climate. This study investigated two unconditioned Thai Buddhist temples located in the urban area of Bangkok, Thailand. One is a 100-year-old, high-mass temple. The other is a 5-year-old, lower-mass temple. The indoor measurements revealed that the thermal condition inside both temples exceed the ASHRAE-recommended comfort zone. Surprisingly, the older temple maintained a more comfortable indoor condition due to its thermal inertia, shading, and earth contacts. A baseline thermal and airflow model of the old temple was established using a calibrated computer simulation method. To accomplish this, HEATX, a 3-D Computational Fluid Dynamics (CFD) code, was coupled with the DOE-2 thermal simulation program. HEATX was used to calculate the airflow rate and the surface convection coefficients for DOE-2, and DOE-2 was used to provide physical input variables to form the boundary conditions for HEATX. In this way calibrated DOE-2/CFD simulation model was accomplished, and the baseline model was obtained. To investigate an improved design, four design options were studied: 1) a reflective or low-solar absorption roof, 2) R-30 ceiling insulation, 3) shading devices, and 4) attic ventilation. Each was operated using three modes of ventilation. The low-absorption roof and the R-30 ceiling insulation options were found to be the most effective options, whereas the shading devices and attic ventilation were less effective options, regardless of which ventilation mode was applied. All design options performed much better when nighttime-only ventilation was used. Based on this analysis, two prototype temples was proposed (i.e., low-mass and high-mass temples). From the simulation results of the two prototypes, design and operation guidelines are proposed, which consist of: 1) increased wall and ceiling insulation, 2) white-colored, low-absorption roof, 3) slab-on-ground floor, 4) shading devices, 5) nighttime-only ventilation, 6) attic ventilation, and 7) wider openings to increase the natural ventilation air flow windows, wing walls, and vertical fins.

Sreshthaputra, Atch

2007-11-29T23:59:59.000Z

323

Solar heating and hot water system installed at the Senior Citizen Center, Huntsville, Alabama. [Includes engineering drawings  

DOE Green Energy (OSTI)

Information is provided on the solar energy system installed at the Huntsville Senior Citizen Center. The solar space heating and hot water facility and the project involved in its construction are described in considerable detail and detailed drawings of the complete system and discussions of the planning, the hardware, recommendations, and other pertinent information are included. The facility was designed to provide 85 percent of the hot water and 85 percent of the space heating requirements. Two important factors concerning this project for commercial demonstration are the successful use of silicon oil as a heat transfer fluid and the architecturally aesthetic impact of a large solar energy system as a visual centerpoint. There is no overheat or freeze protection due to the characteristics of the silicon oil and the design of the system. Construction proceeded on schedule with no cost overruns. It is designed to be relatively free of scheduled maintenance, and has experienced practically no problems.

Not Available

1980-02-01T23:59:59.000Z

324

Cost effective solar hot water system for Econo-Travel Motor Hotel located at Bluefield, West Virginia. Final report  

SciTech Connect

The final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 3400 Cumberland Road, Bluefield, West Virginia. The description of the system along with the final breakdown performance data and payback time are given. The payback time for the installed system will be approximately five (5) years instead of the 7.73 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. The success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

1979-07-01T23:59:59.000Z

325

Cost effective solar hot water system for Econo-Travel Motor Hotel located at Richmond, Virginia. Final report  

SciTech Connect

The final report is presented of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 5408 Williamsburg Road, Richmond, Virginia. The description of the system is given along with the final cost breakdown, expected performance data and expected payback time for the installed system is estimated to be approximately five (5) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. The success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

1979-09-01T23:59:59.000Z

326

Impact of a solar domestic hot water demand-side management program on an electric utility and its customers  

DOE Green Energy (OSTI)

A methodology to assess the economic and environmental impacts of a large scale implementation of solar domestic hot water (SDHW) systems is developed. Energy, emission and demand reductions and their respective savings are quantified. It is shown that, on average, an SDHW system provides an energy reduction of about 3200 kWH, avoided emissions of about 2 tons and a capacity contribution of 0.7 kW to a typical Wisconsin utility that installs 5000 SDHW system. The annual savings from these reductions to utility is {dollar_sign}385,000, providing a return on an investment of over 20{percent}. It is shown that, on average, a consumer will save {dollar_sign}211 annually in hot water heating bills. 8 refs., 7 figs.

Trzeniewski, J.; Mitchell, J.W.; Klein, S.A.; Beckman, W.A.

1996-09-01T23:59:59.000Z

327

Cost effective solar hot water system for Econo-Travel Motor Hotel located at Woodbrdge, VA. Final report  

SciTech Connect

The final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 13317 Gordon Boulevard, Woodbridge, Virginia is given. The description of the system along with the final breakdown, performance data and payback time are given. The payback time for the installed system will be approximately four (4) years instead of the 7.2 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. As called for in the proposal to DOE, the success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

1978-11-01T23:59:59.000Z

328

Cost effective solar hot water system for Econo-Travel Motor Hotel located at Bluefield, West Virginia. Final report  

DOE Green Energy (OSTI)

The final report of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 3400 Cumberland Road, Bluefield, West Virginia. The description of the system along with the final breakdown performance data and payback time are given. The payback time for the installed system will be approximately five (5) years instead of the 7.73 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. The success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

Not Available

1979-07-01T23:59:59.000Z

329

Cost effective solar hot water system for Econo-Travel Motor Hotel located at Richmond, Virginia. Final report  

DOE Green Energy (OSTI)

The final report is presented of a cost effective solar hot water heating system installed on the Econo-Travel Motor Hotel at 5408 Williamsburg Road, Richmond, Virginia. The description of the system is given along with the final cost breakdown, expected performance data and expected payback time for the installed system is estimated to be approximately five (5) years instead of the 6.65 years estimated for the proposal. The additional savings is due to the reduction in the peak demand charge since the electric hot water heaters are not required to operate at the same time each morning as the dryers used for the laundry. The success of the system will be determined by the reduction in the utility cost and reduced use of our fossil fuels. The results shown in the hotel's monthly electricity bills indicate that this goal has been accomplished.

Not Available

1979-09-01T23:59:59.000Z

330

Hydrology and geochemistry of thermal ground water in southwestern Idaho and north-central Nevada  

DOE Green Energy (OSTI)

The study area occupies about 14,500 square miles in southwestern Idaho and north-central Nevada. Thermal ground water occurs under artesian conditions, in discontinuous or compartmented zones, in igneous or sedimentary rocks of Tertiary age. Ground-water movement is generally northward. Temperatures of the ground water range from about 30/sup 0/ to more than 80/sup 0/C. Chemical analyses of water from 12 wells and 9 springs indicate that nonthermal waters are a calcium bicarbonate type; thermal waters are a sodium bicarbonate type. Chemical geothermometers indicate probable maximum reservoir temperatures are near 100/sup 0/C. Concentration of tritium in the thermal water water is near zero.

Young, H.W.; Lewis, R.E.

1980-12-01T23:59:59.000Z

331

Report on the analysis of field data relating to the reliability of solar hot water systems.  

DOE Green Energy (OSTI)

Utilities are overseeing the installations of thousand of solar hot water (SHW) systems. Utility planners have begun to ask for quantitative measures of the expected lifetimes of these systems so that they can properly forecast their loads. This report, which augments a 2009 reliability analysis effort by Sandia National Laboratories (SNL), addresses this need. Additional reliability data have been collected, added to the existing database, and analyzed. The results are presented. Additionally, formal reliability theory is described, including the bathtub curve, which is the most common model to characterize the lifetime reliability character of systems, and for predicting failures in the field. Reliability theory is used to assess the SNL reliability database. This assessment shows that the database is heavily weighted with data that describe the reliability of SHW systems early in their lives, during the warranty period. But it contains few measured data to describe the ends of SHW systems lives. End-of-life data are the most critical ones to define sufficiently the reliability of SHW systems in order to answer the questions that the utilities pose. Several ideas are presented for collecting the required data, including photometric analysis of aerial photographs of installed collectors, statistical and neural network analysis of energy bills from solar homes, and the development of simple algorithms to allow conventional SHW controllers to announce system failures and record the details of the event, similar to how aircraft black box recorders perform. Some information is also presented about public expectations for the longevity of a SHW system, information that is useful in developing reliability goals.

Menicucci, David F. (Building Specialists, Inc., Albuquerque, NM)

2011-07-01T23:59:59.000Z

332

Thermal signature reduction through liquid nitrogen and water injection  

E-Print Network (OSTI)

The protection of aircraft against shoulder fired heat seeking missiles is of growing concern in the aviation community. This thesis presents a simple method for shielding the infrared signature of a jet engine from heat seeking missiles. The research efforts investigated two approaches to shield the thermal signature of the Noel Penny Type 401 turbojet at the Texas A&M University Propulsion Lab Test Cell. First, liquid nitrogen was injected through a manifold at a flow rate equivalent to the flow rate of exhaust gases, producing a small temperature reduction in the exhaust but no infrared shielding. Second, water was injected at a flow rate of 13% of the flow of exhaust gases, producing a greater temperature reduction and some shielding. Water was then injected through a manifold at a ?ow rate of 118% of the flow rate of exhaust gases, producing a substantial reduction in temperature and complete shielding of the infrared signature. Additionally, numerical simulations were performed using FLUENT to support these experiments. Results are presented in the form of thermocouple data and thermal images from the experiments, and in the form of temperature contours and streamtraces from the simulations.

Guarnieri, Jason Antonio

2004-12-01T23:59:59.000Z

333

Relationship of regional water quality to aquifer thermal energy storage  

DOE Green Energy (OSTI)

Ground-water quality and associated geologic characteristics may affect the feasibility of aquifer thermal energy storage (ATES) system development in any hydrologic region. This study sought to determine the relationship between ground-water quality parameters and the regional potential for ATES system development. Information was collected from available literature to identify chemical and physical mechanisms that could adversely affect an ATES system. Appropriate beneficiation techniques to counter these potential geochemical and lithologic problems were also identified through the literature search. Regional hydrology summaries and other sources were used in reviewing aquifers of 19 drainage regions in the US to determine generic geochemical characteristics for analysis. Numerical modeling techniques were used to perform geochemical analyses of water quality from 67 selected aquifers. Candidate water resources regions were then identified for exploration and development of ATES. This study identified six principal mechanisms by which ATES reservoir permeability may be impaired: (1) particulate plugging, (2) chemical precipitation, (3) liquid-solid reactions, (4) formation disaggregation, (5) oxidation reactions, and (6) biological activity. Specific proven countermeasures to reduce or eliminate these effects were found. Of the hydrologic regions reviewed, 10 were identified as having the characteristics necessary for ATES development: (1) Mid-Atlantic, (2) South-Atlantic Gulf, (3) Ohio, (4) Upper Mississippi, (5) Lower Mississippi, (6) Souris-Red-Rainy, (7) Missouri Basin, (8) Arkansas-White-Red, (9) Texas-Gulf, and (10) California.

Allen, R.D.

1983-11-01T23:59:59.000Z

334

Thermal ground water flow systems in the thrust zone in southeastern Idaho  

DOE Green Energy (OSTI)

The results of a regional study of thermal and non-thermal ground water flow systems in the thrust zone of southern Idaho and western Wyoming are presented. The study involved hydrogeologic and hydrochemical data collection and interpretation. Particular emphasis was placed on analyzing the role that thrust zones play in controlling the movement of thermal and non-thermal fluids.

Ralston, D.R.

1983-05-01T23:59:59.000Z

335

Line Heat-Source Guarded Hot Plate  

Science Conference Proceedings (OSTI)

Line Heat-Source Guarded Hot Plate. Description: The 1-meter guarded hot-plate apparatus measures thermal conductivity of building insulation. ...

2012-03-06T23:59:59.000Z

336

Trace Element Geochemical Zoning in the Roosevelt Hot Springs...  

Open Energy Info (EERE)

Element Geochemical Zoning in the Roosevelt Hot Springs Thermal Area, Utah Abstract Chemical interaction of thermal brines with reservoir rock in the Roosevelt Hot Springs...

337

Don't Let Your Money and Hot Water Go Down the Drain | Department...  

NLE Websites -- All DOE Office Websites (Extended Search)

recovery systems capture some of this energy to preheat cold water entering the water heater or going to other water fixtures. How It Works In its simplest form, a drain-water...

338

Engineering methods for predicting productivity and longevity of hot-dry-rock geothermal reservoir in the presence of thermal cracks. Technical completion report  

DOE Green Energy (OSTI)

Additional heat extraction from geothermal energy reservioirs depends on the feasibility to extend the main, hydraulic fracture through secondary thermal cracks of the adjacent hot rock. When the main, hydraulic fracture is cooled sufficiently, these secondary thermal cracks are produced normal to the main fracture surface. As such, both the heat transfer surface area and heat energy available to the fluid circulating through the main, hydraulic fracture system increase. Methods for predicting the productivity and longevity of a geothermal reservoir were developed. A question is whether a significant long-term enhancement of the heat extraction process is achieved due to these secondary thermal cracks. In short, the objectives of this investigation are to study how the main, hydraulic fracture can be extended through these secondary thermal cracks of the rock, and to develop methods for predicting the productivity and longevity of a geothermal reservoir.

Hsu, Y.C.; Lu, Y.M.; Ju, F.D.; Dhingra, K.C.; Lu, Y.M.; Ju, F.D.; Dhingra, K.C.

1978-01-01T23:59:59.000Z

339

A comparison of central and individual systems for space conditioning and domestic hot water in new multifamily buildings  

SciTech Connect

This report compares the energy performance and life-cycle cost of central and individual heating, ventilating, and air-conditioning (HVAC) systems as well as domestic hot water (DHW) systems in new multifamily buildings. The different systems were analyzed by using DOE-2.1C to model prototypical apartment buildings in Chicago and Atlanta with Weather Year for Energy Calculation weather data. The building is equipped with either a central chiller and gas-fired boiler, which supply four-pipe fan coils in each apartment, or is conditioned by individual packaged terminal air conditioners in each apartment. The building with central HVAC also has a central, gas-fired domestic hot water system; the building with individual units has electric water heaters in each apartment. The individual systems were modeled with and without a setback thermostat. The use of natural gas for space and water heating and the more efficient central chiller resulted in an annual energy cost savings for the central system in both cities. A life-cycle cost comparison of system types shows that apartment buildings with as few as five units in Chicago and as few as 30 units in Atlanta should be designed with central HVAC and DHW systems.

Byrne, S.J. (Lawrence Berkeley Lab., Berkeley, CA (US)); Fay, J.M. (Gas Research Inst., Chicago, IL (US))

1989-01-01T23:59:59.000Z

340

Toward zero-emission data centers through direct reuse of thermal energy  

Science Conference Proceedings (OSTI)

We have tested hot water data center cooling by directly reusing the generated thermal energy in neighborhood heating systems. First, we introduce high-performance liquid cooling devices with minimal thermal resistance in order to cool a computer system ...

T. Brunschwiler; B. Smith; E. Ruetsche; B. Michel

2009-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Potential of solar domestic hot water systems in rural areas for greenhouse gas emission reduction in Poland  

SciTech Connect

Application of solar energy for preparing domestic hot water is one of the easiest methods of utilization of this energy. At least part of the needs for warm tap water could be covered by solar systems. At present, mainly coal is used for water heating at dwellings in rural areas in Poland. Warm tap water consumption will increase significantly in the future as standards of living are improved. This can result in the growth of electricity use and an increase in primary fuel consumption. Present and future methods of warm sanitary water generation in rural areas in Poland is discussed, and associated greenhouse gas (GHG) emissions are estimated. It is predicted that the emission of CO{sub 2} and NOx will increase. The emission of CO and CH{sub 4} will decrease because of changes in the structure of the final energy carriers used. The economic and market potentials of solar energy for preparing warm water in rural areas are discussed. It is estimated that solar systems can meet 30%-45% of the energy demand for warm water generation in rural areas at a reasonable cost, with a corresponding CO{sub 2} emission reduction. The rate of realization of the economic potential of solar water heaters depends on subsidies for the installation of equipment. 13 refs., 9 tabs.

Skowronski, P. [Polish Foundation for Energy Efficiency, Warsaw (Poland); Wisniewski, G. [Institute for Building, Mechanization and Electrification of Agriculture, Warsaw (Poland)

1996-09-01T23:59:59.000Z

342

Storage capacity in hot dry rock reservoirs  

DOE Patents (OSTI)

A method is described for extracting thermal energy, in a cyclic manner, from geologic strata which may be termed hot dry rock. A reservoir comprised of hot fractured rock is established and water or other liquid is passed through the reservoir. The water is heated by the hot rock, recovered from the reservoir, cooled by extraction of heat by means of heat exchange apparatus on the surface, and then re-injected into the reservoir to be heated again. Water is added to the reservoir by means of an injection well and recovered from the reservoir by means of a production well. Water is continuously provided to the reservoir and continuously withdrawn from the reservoir at two different flow rates, a base rate and a peak rate. Increasing water flow from the base rate to the peak rate is accomplished by rapidly decreasing backpressure at the outlet of the production well in order to meet periodic needs for amounts of thermal energy greater than a baseload amount, such as to generate additional electric power to meet peak demands. The rate of flow of water provided to the hot dry rock reservoir is maintained at a value effective to prevent depletion of the liquid inventory of the reservoir. 4 figs.

Brown, D.W.

1997-11-11T23:59:59.000Z

343

Storage capacity in hot dry rock reservoirs  

DOE Patents (OSTI)

A method of extracting thermal energy, in a cyclic manner, from geologic strata which may be termed hot dry rock. A reservoir comprised of hot fractured rock is established and water or other liquid is passed through the reservoir. The water is heated by the hot rock, recovered from the reservoir, cooled by extraction of heat by means of heat exchange apparatus on the surface, and then re-injected into the reservoir to be heated again. Water is added to the reservoir by means of an injection well and recovered from the reservoir by means of a production well. Water is continuously provided to the reservoir and continuously withdrawn from the reservoir at two different flow rates, a base rate and a peak rate. Increasing water flow from the base rate to the peak rate is accomplished by rapidly decreasing backpressure at the outlet of the production well in order to meet periodic needs for amounts of thermal energy greater than a baseload amount, such as to generate additional electric power to meet peak demands. The rate of flow of water provided to the hot dry rock reservoir is maintained at a value effective to prevent depletion of the liquid

Brown, Donald W. (Los Alamos, NM)

1997-01-01T23:59:59.000Z

344

Metal Ferrite Spinels for Solar-thermal Water Splitting REDOX Cycles  

Science Conference Proceedings (OSTI)

Presentation Title, Metal Ferrite Spinels for Solar-thermal Water Splitting REDOX Cycles. Author(s), Alan Weimer. On-Site Speaker (Planned), Alan Weimer.

345

A Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrotherm...  

Open Energy Info (EERE)

Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrothermal Calcites, Long Valley Caldera, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home...

346

The conversion of biomass to ethanol using geothermal energy derived from hot dry rock to supply both the thermal and electrical power requirements  

SciTech Connect

The potential synergism between a hot dry rock (HDR) geothermal energy source and the power requirements for the conversion of biomass to fuel ethanol is considerable. In addition, combining these two renewable energy resources to produce transportation fuel has very positive environmental implications. One of the distinct advantages of wedding an HDR geothermal power source to a biomass conversion process is flexibility, both in plant location and in operating process is flexibility, both in plant location and in operating conditions. The latter obtains since an HDR system is an injection conditions of flow rate, pressure, temperature, and water chemistry are under the control of the operator. The former obtains since, unlike a naturally occurring geothermal resource, the HDR resource is very widespread, particularly in the western US, and can be developed near transportation and plentiful supplies of biomass. Conceptually, the pressurized geofluid from the HDR reservoir would be produced at a temperature in the range of 200{degrees} to 220{degrees}c. The higher enthalpy portion of the geofluid thermal energy would be used to produce a lower-temperature steam supply in a countercurrent feedwater-heater/boiler. The steam, following a superheating stage fueled by the noncellulosic waste fraction of the biomass, would be expanded through a turbine to produce electrical power. Depending on the lignin fraction of the biomass, there would probably be excess electrical power generated over and above plant requirements (for slurry pumping, stirring, solids separation, etc.) which would be available for sale to the local power grid. In fact, if the hybrid HDR/biomass system were creatively configured, the power plant could be designed to produce daytime peaking power as well as a lower level of baseload power during off-peak hours.

Brown, D.W.

1997-10-01T23:59:59.000Z

347

Geothermal investigations in Idaho. Part 5. Geochemistry and geologic setting of the thermal waters of the northern Cache Valley area, Franklin County, Idaho  

DOE Green Energy (OSTI)

The thermal waters of the north-south trending graben structure known as northern Cache Valley in southeastern Idaho were sampled during the summer and fall of 1973. Geologic and gravity data for the area indicate fault control for nearly all thermal water occurrences. Thermal-water discharges are generally restricted to the course of the Bear River with few known in areas away from the river. Spring deposits in the form of travertine may not be indications of low temperature thermal waters because abundant limestone and dolomite make up the geologic framework. Much gas, believed to consist mostly of carbon dioxide, is being evolved from many of the springs. The hottest water is found near Battle Creek and Squaw hot springs approximately 4 kilometers northwest of the town of Preston. Metoric waters descend along fault planes, fractures, and fissures to depths at which they are heated by increasing rock temperatures (geothermal gradient of 5/sup 0/C per 100 meters). Due to decreased density, the heated waters rise along the same or adjacent fault planes to the surface. The quartz equilibrium geochemical thermometer applied to the thermal water discharges indicates temperatures approaching 150/sup 0/C may be encountered by deep drilling. Mixing models, based on quartz solubility, indicate higher aquifer temperatures than the quartz equilibrium thermometer, but chloride concentration vs. temperature plots are not linear. The sodium-potassium-calcium geochemical thermometer indicates higher temperatures than quartz equilibrium and mixing models. The thermal waters are higher in total dissolved solids (12,000 to 13,000 milligrams per liter) than are known elsewhere in Idaho and represent potential pollution hazards should large scale withdrawal be attempted.

Mitchell, J.C.

1976-07-01T23:59:59.000Z

348

Hot Water Draw Patterns in Single-Family Houses: Findings from Field Studies  

E-Print Network (OSTI)

water also is used by dishwashers and clothes washers. Hotand water efficient dishwashers and clothes washers. Thepeople clotheswasher dishwasher showers city state bathubs

Lutz, Jim

2012-01-01T23:59:59.000Z

349

Pilot Phase of a Field Study to Determine Waste of Water and Energy in Residential Hot-Water Distribution Systems  

E-Print Network (OSTI)

understanding the waste of energy and water in residentialStudy to Determine Waste of Water and Energy in ResidentialStudy to Determine Waste of Water and Energy in Residential

Lutz, Jim

2012-01-01T23:59:59.000Z

350

Development of a gas backup heater for solar domestic hot-water systems. Final report, April 1978-April 1980  

DOE Green Energy (OSTI)

A comprehensive program was undertaken to develop a unique gas fired backup for solar domestic hot water systems. Detailed computer design tools were written. A series of heat transfer experiments were performed to characterize the performance of individual components. A full scale engineering prototype, including the solar preheat tank and solar heat exchanger, was designed, fabricated and subjected to limited testing. Firing efficiency for the backup system was found to be 81.4% at a firing rate of 50,000 Btu/h. Long term standby losses should be negligible.

Morrison, D.J.; Grunes, H.E.; de Winter, F.; Armstrong, P.R.

1980-06-01T23:59:59.000Z

351

Geothermal investigations in Idaho. Part 1. Geochemistry and geologic setting of selected thermal waters  

DOE Green Energy (OSTI)

At least 380 hot springs and wells are known to occur throughout the central and southern parts of Idaho. One hundred twenty-four of these were inventoried as a part of the study reported on herein. At the spring vents and wells visited, the thermal waters flow from rocks ranging in age from Precambrian to Holocene and from a wide range of rock types-igneous, metamorphic, and both consolidated and unconsolidated sediments. Twenty-eight of the sites visited occur on or near fault zones while a greater number were thought to be related to faulting. Measured water temperatures at the 124 wells and springs inventoried ranged from 12/sup 0/ to 93/sup 0/C (degrees Celsius) and averaged 50/sup 0/C. Estimated aquifer temperatures, calculated using the silica and the sodium-potassium-calcium geochemical thermometers, range from 5/sup 0/ to 370/sup 0/C and averaged 110/sup 0/C. Estimated aquifer temperatures in excess of 140/sup 0/C were found at 42 sites. No areal patterns to the distribution of temperatures either at the surface or subsurface were found. Generally, the quality of the waters sampled was good. Dissolved-solids concentrations range from 14 to 13,700 mg/l (milligrams per liter) and averaged 812 mg/l, with higher values occurring in the southeastern part of the State. Twenty-five areas were selected for future study. Of these areas, 23 were selected on the basis of estimated aquifer temperatures of 140/sup 0/C or higher and two on the basis of geologic considerations.

Young, H.W.; Mitchell, J.C.

1973-05-01T23:59:59.000Z

352

Prediction of Severe Accident Counter Current Natural Circulation Flows in the Hot Leg of a Pressurized Water Reactor  

Science Conference Proceedings (OSTI)

During certain phases of a severe accident in a pressurized water reactor (PWR), the core becomes uncovered and steam carries heat to the steam generators through natural circulation. For PWR's with U-tube steam generators and loop seals filled with water, a counter current flow pattern is established in the hot leg. This flow pattern has been experimentally observed and has been predicted using computational fluid dynamics (CFD). Predictions of severe accident behavior are routinely carried out using severe accident system analysis codes such as SCDAP/RELAP5 or MELCOR. These codes, however, were not developed for predicting the three-dimensional natural circulation flow patterns during this phase of a severe accident. CFD, along with a set of experiments at 1/7. scale, have been historically used to establish the flow rates and mixing for the system analysis tools. One important aspect of these predictions is the counter current flow rate in the nearly 30 inch diameter hot leg between the reactor vessel and steam generator. This flow rate is strongly related to the amount of energy that can be transported away from the reactor core. This energy transfer plays a significant role in the prediction of core failures as well as potential failures in other reactor coolant system piping. CFD is used to determine the counter current flow rate during a severe accident. Specific sensitivities are completed for parameters such as surge line flow rates, hydrogen content, as well as vessel and steam generator temperatures. The predictions are carried out for the reactor vessel upper plenum, hot leg, a portion of the surge line, and a steam generator blocked off at the outlet plenum. All predictions utilize the FLUENT V6 CFD code. The volumetric flow in the hot leg is assumed to be proportional to the square root of the product of normalized density difference, gravity, and hydraulic diameter to the 5. power. CFD is used to determine the proportionality constant in the range from 0.11 to 0.13 and termed a discharge coefficient. The value is relatively unchanged for typical surge line flow rates as well as the hydrogen content in the flow. Over a significant range of expected temperature differences for the steam generator and reactor vessel upper plenum, the discharge coefficient also remained consistent. The discharge coefficient is a suitable model for determining the hot leg counter current flow rates during this type of severe accident. (author)

Boyd, Christopher F. [United States Nuclear Regulatory Commission, Washington, DC 20555-0001 (United States)

2006-07-01T23:59:59.000Z

353

THERMAL ENERGY STORAGE IN AQUIFERS WORKSHOP  

E-Print Network (OSTI)

Aquifers of Hot Water from Solar Power Systems," presentedof hot water from solar power systems. Lawrence BerkeleyAquifers of Hot Water from Solar Power Systems," Proceedings

Authors, Various

2011-01-01T23:59:59.000Z

354

In-situ parameter estimation for solar domestic hot water heating systems components. Final report, June 1995--May 1996  

DOE Green Energy (OSTI)

Three different solar domestic hot water systems are being tested at the Colorado State University Solar Energy Applications Laboratory; an unpressurized drain-back system with a load side heat exchanger, an integral collector storage system, and an ultra low flow natural convection heat exchanger system. The systems are fully instrumented to yield data appropriate for in-depth analyses of performance. The level of detail allows the observation of the performance of the total system and the performance of the individual components. This report evaluates the systems based on in-situ experimental data and compares the performances with simulated performances. The verification of the simulations aids in the rating procedure. The whole system performance measurements are also used to analyze the performance of individual components of a solar hot water system and to develop improved component models. The data are analyzed extensively and the parameters needed to characterize the systems fully are developed. Also resulting from this indepth analysis are suggested design improvements wither to the systems or the system components.

Smith, T.R.

1997-03-01T23:59:59.000Z

355

Performance and economic evaluation of the seahorse natural gas hot water heater conversion at Fort Stewart. Interim report, 1994 Summer  

Science Conference Proceedings (OSTI)

The federal government is the largest single energy consumer in the United States cost valued at nearly $10 billion annually. The US Department of Energy`s (DOE) Federal Energy Management Program (FEMP) supports efforts to reduce energy use and associated expenses in the federal sector. One such effort, the New Technology Demonstration Program (NTDP), seeks to evaluate new energy-saving US technologies and secure their more timely adoption by the US government. Pacific Northwest Laboratory (PNL) is one of four DOE laboratories that participate in the New Technologies Demonstration Program, providing technical expertise and equipment to evaluate new, energy-saving technologies being studied under that program. This interim report provides the results of a field evaluation that PNL conducted for DOE/FEMP and the US Department of Defense (DoD) Strategic Environmental Research and Development Program (SERDP) to examine the performance of a candidate energy-saving technology-a hot water heater conversion system to convert electrically heated hot water tanks to natural gas fuel. The unit was installed at a single residence at Fort Stewart, a US Army base in Georgia, and the performance was monitored under the NTDP. Participating in this effort under a Cooperative Research and Development Agreement (CRADA) were Gas Fired Products, developers of the technology; the Public Service Company of North Carolina; Atlanta Gas Light Company; the Army Corps of Engineers; Fort Stewart; and Pacific Northwest Laboratory.

Winiarski, D.W.

1995-01-01T23:59:59.000Z

356

Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot  

Open Energy Info (EERE)

Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Springs Thermal Area, Utah Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Trace-Element Distribution In An Active Hydrothermal System, Roosevelt Hot Springs Thermal Area, Utah Details Activities (3) Areas (1) Regions (0) Abstract: Chemical interaction of thermal fluids with reservoir rock in the Roosevelt Hot Springs thermal area, Utah, has resulted in the development of characteristic trace-element dispersion patterns. Multielement analyses of surface rock samples, soil samples and drill cuttings from deep exploration wells provide a three-dimensional perspective of chemical redistribution within this structurally-controlled hot-water geothermal system. Five distinctive elemental suites of chemical enrichment are

357

Water and Energy Wasted During Residential Shower Events: Findings from a Pilot Field Study of Hot Water Distribution Systems  

E-Print Network (OSTI)

the shower only. The wasted energy is the difference betweenLBNL-5115E Water and Energy Wasted During Residential Showercalculate the water and energy wasted during shower events

Lutz, Jim

2012-01-01T23:59:59.000Z

358

Performance Evaluation of a 4.5 kW (1.3 Refrigeration Tons) Air-Cooled Lithium Bromide/Water Solar Powered (Hot-Water-Fired) Absorption Unit  

Science Conference Proceedings (OSTI)

During the summer months, air-conditioning (cooling) is the single largest use of electricity in both residential and commercial buildings with the major impact on peak electric demand. Improved air-conditioning technology has by far the greatest potential impact on the electric industry compared to any other technology that uses electricity. Thermally activated absorption air-conditioning (absorption chillers) can provide overall peak load reduction and electric grid relief for summer peak demand. This innovative absorption technology is based on integrated rotating heat exchangers to enhance heat and mass transfer resulting in a potential reduction of size, cost, and weight of the "next generation" absorption units. Rotartica Absorption Chiller (RAC) is a 4.5 kW (1.3 refrigeration tons or RT) air-cooled lithium bromide (LiBr)/water unit powered by hot water generated using the solar energy and/or waste heat. Typically LiBr/water absorption chillers are water-cooled units which use a cooling tower to reject heat. Cooling towers require a large amount of space, increase start-up and maintenance costs. However, RAC is an air-cooled absorption chiller (no cooling tower). The purpose of this evaluation is to verify RAC performance by comparing the Coefficient of Performance (COP or ratio of cooling capacity to energy input) and the cooling capacity results with those of the manufacturer. The performance of the RAC was tested at Oak Ridge National Laboratory (ORNL) in a controlled environment at various hot and chilled water flow rates, air handler flow rates, and ambient temperatures. Temperature probes, mass flow meters, rotational speed measuring device, pressure transducers, and a web camera mounted inside the unit were used to monitor the RAC via a web control-based data acquisition system using Automated Logic Controller (ALC). Results showed a COP and cooling capacity of approximately 0.58 and 3.7 kW respectively at 35 C (95 F) design condition for ambient temperature with 40 C (104 F) cooling water temperature. This is in close agreement with the manufacturer data of 0.60 for COP and 3.9 kW for cooling capacity. This study resulted in a complete performance map of RAC which will be used to evaluate the potential benefits of rotating heat exchangers in making the "next-generation" absorption chillers more compact and cost effective without any significant degradation in the performance. In addition, the feasibility of using rotating heat exchangers in other applications will be evaluated.

Zaltash, Abdolreza [ORNL; Petrov, Andrei Y [ORNL; Linkous, Randall Lee [ORNL; Vineyard, Edward Allan [ORNL

2007-01-01T23:59:59.000Z

359

Efficient thermal management for multiprocessor systems  

E-Print Network (OSTI)

2.2.4 Thermal Modeling . . . . . . . .63 Table 4.3: Thermal Hot Spots . . . . . . . . . . . . . .Performance-Efficient Thermal Management . . . . . . . . . .

Co?kun, Ay?e K?v?lc?m

2009-01-01T23:59:59.000Z

360

Active solar thermal design manual  

SciTech Connect

This manual is aimed at systems design engineers, architects, system supplier/installers, and contractor/builders. Practical information for both skilled and inexperienced designers. Solar thermal applications focuses on residential and commercial space heating, potable hot water heating, process water heating, and space cooling.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Solar preheating of both domestic hot water and space. Final technical report for the Sea Loft restaurant in Long Branch, New Jersey  

Science Conference Proceedings (OSTI)

Stephen Giddio's Sea Loft Restaurant in Long Branch, NJ is equipped with an active solar system for preheating water for both space heating and domestic hot water. Three pumped water loops, each a closed circuit, transfer heat from one major component to another. Solar heat is collected by an array of 83 evacuated tube collectors. The acceptance test results are appended, as well as the operational and maintenance manual. Reference CAPE-2805. (LEW)

Not Available

1982-11-28T23:59:59.000Z

362

Design manual for solar heating of buildings and domestic hot water  

SciTech Connect

This manual presents design and cost analysis methods for sizing and payback estimating of solar heat collectors for augmentation of portable water heaters and space heaters. Sufficient information is presented to enable almost anyone to design solar space and water heating systems or conduct basic feasibility studies preparatory to design of large installations. Both retrofit and new installations are considered. (MOW)

Field, R.L.

1977-01-01T23:59:59.000Z

363

Apparatus and method for pumping hot, erosive slurry of coal solids in coal derived, water immiscible liquid  

SciTech Connect

An apparatus for and method of pumping hot, erosive slurry of coal solids in a coal derived, water immiscible liquid to higher pressure involves the use of a motive fluid which is miscible with the liquid of the slurry. The apparatus includes a pump 12, a remote check valve 14 and a chamber 16 between and in fluid communication with the pump 12 and check valve 14 through conduits 18,20. Pump 12 exerts pressure on the motive fluid and thereby on the slurry through a concentration gradient of coal solids within chamber 16 to alternately discharge slurry under pressure from the outlet port of check valve 14 and draw slurry in through the inlet port of check valve 14.

Ackerman, Carl D. (Olympia, WA)

1983-03-29T23:59:59.000Z

364

Feasibility study and roadmap to improve residential hot water distribution systems  

E-Print Network (OSTI)

perspective, the sink and dishwashers must be considered incool off once again. For dishwashers, not only is the energyit must be made up by the dishwasher heating the cool water

Lutz, James D.

2004-01-01T23:59:59.000Z

365

A phenomenological model of the thermal hydraulics of convective boiling during the quenching of hot rod bundles  

SciTech Connect

In this paper, a phenomenological model of the thermal hydraulics of convective boiling in the post-critical-heat-flux (post-CHF) regime is developed and discussed. The model was implemented in the TRAC-PF1/MOD2 computer code (an advanced best-estimate computer program written for the analysis of pressurized water reactor systems). The model was built around the determination of flow regimes downstream of the quench front. The regimes were determined from the flow-regime map suggested by Ishii and his coworkers. Heat transfer in the transition boiling region was formulated as a position-dependent model. The propagation of the CHF point was strongly dependent on the length of the transition boiling region. Wall-to-fluid film boiling heat transfer was considered to consist of two components: first, a wall-to-vapor convective heat-transfer portion and, second, a wall-to-liquid heat transfer representing near-wall effects. Each contribution was considered separately in each of the inverted annular flow (IAF) regimes. The interfacial heat transfer was also formulated as flow-regime dependent. The interfacial drag coefficient model upstream of the CHF point was considered to be similar to flow through a roughened pipe. A free-stream contribution was calculated using Ishii's bubbly flow model for either fully developed subcooled or saturated nucleate boiling. For the drag in the smooth IAF region, a simple smooth-tube correlation for the interfacial friction factor was used. The drag coefficient for the rough-wavy IAF was formulated in the same way as for the smooth IAF model except that the roughness parameter was assumed to be proportional to liquid droplet diameter entrained from the wavy interface. The drag coefficient in the highly dispersed flow regime considered the combined effects of the liquid droplets within the channel and a liquid film on wet unheated walls. 431 refs., 6 figs., 4 tabs.

Nelson, R.A.; Unal, C.

1991-01-01T23:59:59.000Z

366

Application of solar energy to the supply of industrial hot water. Technical report 4  

SciTech Connect

A solar water heating and steam generating system is being designed for a California laundry. Progress reported includes completion of the analysis of the existing process services, determination of collectable solar energy at El Centro, California, selection of water as the heat transfer fluid in the 200/sup 0/F system and further analyses of heat transfer fluids for the 300/sup 0/F system, meetings and discussions with respect to system controls and monitoring and the collector support structure, and a proposal for the waste heat recovery system. (LEW)

1976-09-01T23:59:59.000Z

367

Geothermometry At Buffalo Valley Hot Springs Area (Laney, 2005) | Open  

Open Energy Info (EERE)

Buffalo Valley Hot Springs Area (Laney, 2005) Buffalo Valley Hot Springs Area (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Buffalo Valley Hot Springs Area (Laney, 2005) Exploration Activity Details Location Buffalo Valley Hot Springs Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being

368

A Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrothermal  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » A Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrothermal Calcites, Long Valley Caldera, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Sr-Isotopic Comparison Between Thermal Waters, Rocks, And Hydrothermal Calcites, Long Valley Caldera, California Details Activities (3) Areas (1) Regions (0) Abstract: The 87Sr/86Sr values of thermal waters and hydrothermal calcites of the Long Valley caldera geothermal system are more radiogenic than those of young intracaldera volcanic rocks. Five thermal waters display 87Sr/86Sr

369

Thermal desalination : structural optimization and integration in clean power and water  

E-Print Network (OSTI)

A large number of resources are dedicated to seawater desalination and will only grow as world-wide water scarcity increases. In arid areas with high temperature and salinity seawater, thermal desalination and power plants ...

Zak, Gina Marie

2012-01-01T23:59:59.000Z

370

Electric Tankless Water Heater (TWH) Performance Evaluation and System Compatibility Report  

Science Conference Proceedings (OSTI)

The Instantaneous Water Heater or Tankless Water Heater (TWH) or Demand Water Heater is designed to provide hot water on demand without a storage tank. Tank water heaters require energy to maintain the water temperature in the tank when not in demand. In tank water heaters, due to the specific heat of the water, the thermal time constant of the water heater will not allow it to supply hot water at the same rate as it is used, hence the use of the tank, storing hot water for instant availability. In the e...

2005-12-22T23:59:59.000Z

371

Economic viability of heat pump desuperheaters for supplying domestic hot water  

Science Conference Proceedings (OSTI)

The heat reclaimer is a heat exchange device that removes superheat from the refrigerant gas in a heat pump or central air conditioning unit and uses that extracted energy to heat water for domestic uses. This analysis examines the energy-saving potential and economic benefit of the heat reclaimer. Energy savings were calculated using a modified bin analytical technique. Economic viability was determined using the simple payback criterion. The analysis was performed for 28 cities in the United States to gain an understanding of the relationship between energy savings, economic viability, and climate. The results of the assessment indicate that the heat reclaimer has payback periods greater than seven years when compared with oil- or gas-fired water heating systems. Because of the long payback periods, the heat reclaimer does not appear to be economically feasible for these applications. However, when compared to electric-resistance water heating units, the heat reclaimer is economically viable, especially in areas where the air conditioning load is substantial or where the price of electricity is high.

Olszewski, M.

1984-01-01T23:59:59.000Z

372

A VISUAL STUDY OF THE CORROSION OF DEFECTED ZIRCALOY-2-CLAD FUEL SPECIMENS BY HOT WATER  

DOE Green Energy (OSTI)

The failure of defected Zircaloy-2-clad uranium and uranium -2 wt.% zircorium fuel specimens in high-purity high-pressure water at 200 to 345 deg C was observed in a windowed antcclave. Time-lapse color motion pictures were taken to provide a record of the progressive changes ending in the complete disintegration of the core material in the specimens. Continuous measurement of the pressure increase caused by accumulation of hydrogen served to monitor the progress of the reaction when clouding of the water by corrosion products made visual observation impossible. The nature of the attack of all specimens was similar, although the time at which different stages occurred varied. Following an induction period, the first evidence of attack was the slow formation of a blister in the cladding area surrounding the defect. Eventually, a copions evolution of hydrogen occurried at the base of the swollen area. In general, a crack could be seen in the cladding at this stage. Catastrophic failure of the specimen followed swiftly. The time required for each phase of the reaction was reduced as the temperature was raised. Initial swelling occurred after about 24 min at 345 deg C but only after 8 hr at 200 deg C. Diffusion-treated uranium2 wt.% zirconium-cored specimens were most resistant to attack. Specimens with beta-treated water-quenched natural-uranium cores were least resistant (auth)

Stephan, E.F.; Miller, P.D.; Fink, F.W.

1959-10-19T23:59:59.000Z

373

Solar preheating of both domestic hot water and space. Final technical report for the Sea Loft restaurant in Long Branch, New Jersey (Engineering Materials)  

Science Conference Proceedings (OSTI)

Stephen Giddio's Sea Loft Restaurant in Long Branch, NJ is equipped with an active solar system for preheating of both Space and Domestic Hot Water (DHW). Three pumped water loops, each closed circuit, transfer heat from one major equipment component to another. The closed loop drain back solar energy collection circuit uses a 3/4 horsepower pump to circulate seventeen gallons per minute of deionized water from the Solar Storage Tank to the Solar Collector Array, and return. This tank has a capacity of 600 gallons. The solar array consist of eighty-three evacuated tube type concentrating collectors. The heat gathered in this circuit is stored in the tank for either simultaneous or future use in either or both of the Space and DHW preheating loops. The preheating of city water prior to its entrance into the gas fired 86 gallon DHW heater is accomplished in a separate 600 gallon capacity tank. Two thirty-five square foot tubed heat exchanger bundles inserted into this tank accept solar heated hot water from the Solar Storage Tank. This solar heated water is pumped at sixteen GPM in a closed loop circuit using a 1/4 HP pump. The preheating of restaurant space is accomplished in a closed loop circuit between the Solar Storage Tank and an eight SF hot water coil inserted into the return air from the Main Dining Room of the restaurant. A 1/4 HP pump circulates fifteen gallons of solar heated hot water per minute. This system incorporates a differential temperature controller that utilizes a multitude of pressure sensors and temperature thermistors located throughout the various portions of the system components and piping. The Display Board mounted on the wall of the Bar-Lounge Area serves to integrate the entire solar system. It not only displays the flow but houses the Btu flowmeters, Digital temperature readouts, and HVAC EMS Programmer. Reference DOE/CS/30007-T1.

Not Available

1982-11-28T23:59:59.000Z

374

NREL: Continuum Magazine - Not Too Hot, Not Too Cold  

NLE Websites -- All DOE Office Websites (Extended Search)

Hot, Not Too Cold Issue 5 Print Version Share this resource Not Too Hot, Not Too Cold Thermal management technologies increase vehicle energy efficiency and performance while...

375

Separation of heavy water by vapor-phase thermal diffusion coupled with distillation and condensation  

Science Conference Proceedings (OSTI)

A study on the enrichment of heavy water in a vapor-phase thermal-diffusion column has been conducted. With the combination of the effects of distillation, vapor-phase thermal diffusion, and partial condensation, considerable improvement in the degree of enrichment has been achieved in a vapor-phase column rather than in a liquid-phase column. It was also found that even the part of enrichment contributed only by vapor-phase thermal-diffusion effect is much higher than that obtained by liquid-phase thermal diffusion.

Yeh, H.M. [Tamkang Univ., Taiwan (China); Chang, S.M. [Cheng Kung Univ., Taiwan (China)

1994-08-01T23:59:59.000Z

376

Isotopic Analysis- Fluid At Indian Valley Hot Springs Geothermal Area  

Open Energy Info (EERE)

Isotopic Analysis- Fluid At Indian Valley Hot Springs Geothermal Area Isotopic Analysis- Fluid At Indian Valley Hot Springs Geothermal Area (1990) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Fluid At Indian Valley Hot Springs Geothermal Area (1990) Exploration Activity Details Location Indian Valley Hot Springs Geothermal Area Exploration Technique Isotopic Analysis- Fluid Activity Date 1990 Usefulness not indicated DOE-funding Unknown Exploration Basis Determine the recharge of the area Notes Hydrogen and oxygen isotope data on waters of Coso thermal and nonthermal waters were studied. Hydrogen and oxygen isotopes do not uniquely define the recharge area for the Coso geothermal system but strongly suggest Sierran recharge with perhaps some local recharge. References

377

Design and Construction of a Guarded Hot Box Facility for Evaluating the Thermal Performance of Building Wall Materials  

E-Print Network (OSTI)

The focus of this study was to design and build a guarded hot box to test the R-Value of building materials. The Riverside Energy Efficiency Laboratory is looking to expand their testing capabilities by including this service. Eventually, the laboratory will become energy star certified. A guarded hot box facility consists of two boxes maintained at specific temperatures and a guard box around each one that is maintained at the same temperature as the box it surrounds. The ASTM C1363 standard was used as guide for the construction and testing of sample specimen. This standard called for an air velocity profile uniform within 10 percent of the average. Velocity tests were performed with various different configurations to give a uniform velocity. Although the velocity did not meet standards, the configuration chosen included a piece of 1/4" pegboard placed 2" away from the top and the bottom of the inner box. By using the known overall heat added and removed from the system, as well as all the heat losses the heat transferred through the specimen and its R-Value can be calculated. The uncertainty of the R-Value and the accuracy of the testing facility gave conflicting results. Future experiments will use improved testing methods that include differential thermocouples to obtain better uncertainty for the R-Value calculations.

Mero, Claire Renee

2012-05-01T23:59:59.000Z

378

Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah: characterization of rock types and alteration in Getty Oil Company well Utah state 52-21  

DOE Green Energy (OSTI)

Getty Oil Company well 52-21 in the Roosevelt Hot Springs thermal area was drilled to 7500 feet in predominantly upper amphibolite facies metamorphic rocks. All lithologies in the drill hole are pervasively but weakly altered: the alteration assemblage is chlorite + sericite + clays with occasional traces of calcite, above 2300 feet, and chlorite + sericite + clays + calcite +- epidote below 2500 feet. A zone of increased alteration intensity from approximately 1800 feet to 2300 feet occurs within and adjacent to a dacite dike which cuts the metamorphic rocks. A second zone of stronger alteration extends from 6000 feet to the bottom of the drill hole. The drill hole which is located approximately 5000 feet south of the center of the silica apron known as the Opal Mound was apparently drilled beyond the influence of acid, high-sulfate brines such as have affected the upper portions of drill holes 72-16, 76-1 and University of Utah 1A and 1B.

Ballantyne, G.H.

1978-11-01T23:59:59.000Z

379

Study on the Mode of Power Plant Circulating Water Waste Heat Regenerative Thermal System  

Science Conference Proceedings (OSTI)

Power Plant Circulating Water (PPCW) waste heat recycling is an important way of increasing a power plant’s primary energy ratio. According to the PPCW waste heat regenerative thermal system, the authors propose two modes of heat pump heat regenerative ... Keywords: heat pump, power plant circulating water (PPCW), waste heat recycling, energy saving

Bi Qingsheng; Ma Yanliang; Yang Zhifu

2009-10-01T23:59:59.000Z

380

Thermal Economic Analysis of an Underground Water Source Heat Pump System  

E-Print Network (OSTI)

The paper presents the thermal economic analysis of an underground water source heat pump system in a high school building based on usage per exergy cost as an evaluation standard, in which the black box model has been used and the cost of underground water has also been considered. The economics of the heat pump and other cooling and heating sources has been compared and then several simple methods to improve the thermal economics of the underground water heat pump system have been put forward.

Zhang, W.; Lin, B.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Gulf Power - Solar Thermal Water Heating Pilot Program (Florida...  

Open Energy Info (EERE)

Clean Energy Analysis Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New...

382

Gulf Power - Solar Thermal Water Heating Program (Florida) |...  

Open Energy Info (EERE)

Low Emission Development Strategies Oil & Gas Smart Grid Solar U.S. OpenLabs Utilities Water Wind Page Actions View form View source History View New Pages Recent Changes All...

383

Validation of Hot Water and Lactic Acid Sprays for the Reduction of Enteric Pathogens on the Surface of Beef Carcasses  

E-Print Network (OSTI)

Escherichia coli O157:H7 and Salmonella have emerged as the most common foodborne enteric pathogens causing human illness from the consumption of beef. By mandate of the U.S. Department of Agriculture (USDA), Food Safety and Inspection Service (FSIS), the industry has implemented a Hazard Analysis and Critical Control Points (HACCP) system that utilize intervention technologies for controlling, preventing, and/or reducing enteric pathogens. In addition, USDA-FSIS has mandated that each facility must validate, monitor, and verify the effectiveness of each intervention implemented to eliminate E. coli O157:H7 and Salmonella. For this study, microbial decontamination interventions at two beef slaughter facilities were validated to demonstrate effectiveness in eliminating or reducing enteric pathogens. The facilities selected utilized either a lactic acid spray treatment or a combination of hot water followed by a lactic acid treatment. At both facilities, mesophilic plate counts (MPC) were significantly (P < 0.05) reduced, and E. coli and coliforms were eliminated below detectable limits at both facilities. No Salmonella positive samples were detected after either facility's intervention sequence. The framework used in this research to validate interventions can also be utilized in the future for yearly verification of the effectiveness of each intervention.

Wright, Kyle D.

2009-12-01T23:59:59.000Z

384

A phenomenological model of the thermal-hydraulics of convective boiling during the quenching of hot rod bundles: Part 2, Assessment of the model with steady-state and transient post-CHF data  

SciTech Connect

After completing the thermal-hydraulic model developed in a companion paper, we performed assessment calculations of the model using steady-state and transient post-critical heat flux (CHF) data. This paper discusses the results of those calculations. The hot-patch model, in conjunction with the other thermal-hydraulic models, was capable of modeling the Winfrith post-CHF hot-patch experiments. The hot-patch model kept the wall temperatures at the specified levels in the hot-patch regions and did not allow any quench-front propagation from either the bottom or the top of the test section. Among the four Winfrith runs selected to assess the hot-patch model, the average deviation in hot-patch power predictions was 15.4%, indicating reasonable predictions of the amount of energy transferred to the fluid by the hot patch. The interfacial heat-transfer model tended to slightly under-predict the vapor temperatures. The maximum difference between calculated and measured vapor superheats was 20%, with a 10% difference for the remainder of the runs considered. The wall-to-fluid heat transfer was predicted reasonably well, and the predicted wall superheats were in reasonable agreement with measured data with a maximum relative error of less than 13%. The effects of pressure, test section power, and flow rate on the axial variation of tube wall temperature are predicted reasonably well for a large range of operating parameters. A comparison of the predicted and measured local wall. The thermal-hydraulic model in TRAC/PF1-MOD2 was used to predict the axial variation of void fraction as measured in Winfrith post-CHF tests. The predictions for reflood calculations were reasonable. The model correctly predicted the trends in void fraction as a result of the effect of pressure and power, with the effect of pressure being more apparent than that of power. 13 refs.

Unal, C.; Nelson, R.

1991-01-01T23:59:59.000Z

385

A phenomenological model of the thermal-hydraulics of convective boiling during the quenching of hot rod bundles: Part 2, Assessment of the model with steady-state and transient post-CHF data  

SciTech Connect

After completing the thermal-hydraulic model developed in a companion paper, we performed assessment calculations of the model using steady-state and transient post-critical heat flux (CHF) data. This paper discusses the results of those calculations. The hot-patch model, in conjunction with the other thermal-hydraulic models, was capable of modeling the Winfrith post-CHF hot-patch experiments. The hot-patch model kept the wall temperatures at the specified levels in the hot-patch regions and did not allow any quench-front propagation from either the bottom or the top of the test section. Among the four Winfrith runs selected to assess the hot-patch model, the average deviation in hot-patch power predictions was 15.4%, indicating reasonable predictions of the amount of energy transferred to the fluid by the hot patch. The interfacial heat-transfer model tended to slightly under-predict the vapor temperatures. The maximum difference between calculated and measured vapor superheats was 20%, with a 10% difference for the remainder of the runs considered. The wall-to-fluid heat transfer was predicted reasonably well, and the predicted wall superheats were in reasonable agreement with measured data with a maximum relative error of less than 13%. The effects of pressure, test section power, and flow rate on the axial variation of tube wall temperature are predicted reasonably well for a large range of operating parameters. A comparison of the predicted and measured local wall. The thermal-hydraulic model in TRAC/PF1-MOD2 was used to predict the axial variation of void fraction as measured in Winfrith post-CHF tests. The predictions for reflood calculations were reasonable. The model correctly predicted the trends in void fraction as a result of the effect of pressure and power, with the effect of pressure being more apparent than that of power. 13 refs.

Unal, C.; Nelson, R.

1991-12-31T23:59:59.000Z

386

Preliminary geothermal investigations at Manley Hot Springs, Alaska  

DOE Green Energy (OSTI)

Manley Hot Springs is one of several hot springs which form a belt extending from the Seward Peninsula to east-central Alaska. All of the hot springs are low-temperature, water-dominated geothermal systems, having formed as the result of circulation of meteoric water along deepseated fractures near or within granitic intrusives. Shallow, thermally disturbed ground at Manley Hot Springs constitutes an area of 1.2 km by 0.6 km along the lower slopes of Bean Ridge on the north side of the Tanana Valley. This area includes 32 springs and seeps and one warm (29.1/sup 0/C) well. The hottest springs range in temperature from 61/sup 0/ to 47/sup 0/C and are presently utilized for space heating and irrigation. This study was designed to characterize the geothermal system present at Manley Hot Springs and delineate likely sites for geothermal drilling. Several surveys were conducted over a grid system which included shallow ground temperature, helium soil gas, mercury soil and resistivity surveys. In addition, a reconnaissance ground temperature survey and water chemistry sampling program was undertaken. The preliminary results, including some preliminary water chemistry, show that shallow hydrothermal activity can be delineated by many of the surveys. Three localities are targeted as likely geothermal well sites, and a model is proposed for the geothermal system at Manley Hot Springs.

East, J.

1982-04-01T23:59:59.000Z

387

Abstract: Air, Thermal and Water Management for PEM Fuel Cell Systems  

DOE Green Energy (OSTI)

PEM fuel cells are excellent candidates for transportation applications due to their high efficiencies. PEM fuel cell Balance of Plant (BOP) components, such as air, thermal, and water management sub-systems, can have a significant effect on the overall system performance, but have traditionally not been addressed in research and development efforts. Recognizing this, the U.S. Department of Energy and Honeywell International Inc. are funding an effort that emphasizes the integration and optimization of air, thermal and water management sub-systems. This effort is one of the major elements to assist the fuel cell system developers and original equipment manufacturers to achieve the goal of an affordable and efficient power system for transportation applications. Past work consisted of: (1) Analysis, design, and fabrication of a motor driven turbocompressor. (2) A systematic trade study to select the most promising water and thermal management systems from five different concepts (absorbent wheel humidifier, gas to gas membrane humidifier, porous metal foam humidifier, cathode recycle compressor, and water injection pump.) This presentation will discuss progress made in the research and development of air, water and thermal management sub-systems for PEM fuel cell systems in transportation applications. More specifically, the presentation will discuss: (1) Progress of the motor driven turbocompressor design and testing; (2) Progress of the humidification component selection and testing; and (3) Progress of the thermal management component preliminary design. The programs consist of: (1) The analysis, design, fabrication and testing of a compact motor driven turbocompressor operating on foil air bearings to provide contamination free compressed air to the fuel cell stack while recovering energy from the exhaust streams to improve system efficiency. (2) The analysis, design, fabrication and testing of selected water and thermal management systems and components to improve system efficiency and reduce packaging size.

Mark K. Gee

2008-10-01T23:59:59.000Z

388

THERMODYNAMIC CONSIDERATIONS FOR THERMAL WATER SPLITTING PROCESSES AND HIGH TEMPERATURE ELECTROLYSIS  

DOE Green Energy (OSTI)

A general thermodynamic analysis of hydrogen production based on thermal water splitting processes is presented. Results of the analysis show that the overall efficiency of any thermal water splitting process operating between two temperature limits is proportional to the Carnot efficiency. Implications of thermodynamic efficiency limits and the impacts of loss mechanisms and operating conditions are discussed as they pertain specifically to hydrogen production based on high-temperature electrolysis. Overall system performance predictions are also presented for high-temperature electrolysis plants powered by three different advanced nuclear reactor types, over their respective operating temperature ranges.

J. E. O'Brien

2008-11-01T23:59:59.000Z

389

Development and testing of a photometric method to identify non-operating solar hot water systems in field settings.  

DOE Green Energy (OSTI)

This report presents the results of experimental tests of a concept for using infrared (IR) photos to identify non-operational systems based on their glazing temperatures; operating systems have lower glazing temperatures than those in stagnation. In recent years thousands of new solar hot water (SHW) systems have been installed in some utility districts. As these numbers increase, concern is growing about the systems dependability because installation rebates are often based on the assumption that all of the SHW systems will perform flawlessly for a 20-year period. If SHW systems routinely fail prematurely, then the utilities will have overpaid for grid-energy reduction performance that is unrealized. Moreover, utilities are responsible for replacing energy for loads that failed SHW system were supplying. Thus, utilities are seeking data to quantify the reliability of SHW systems. The work described herein is intended to help meet this need. The details of the experiment are presented, including a description of the SHW collectors that were examined, the testbed that was used to control the system and record data, the IR camera that was employed, and the conditions in which testing was completed. The details of the associated analysis are presented, including direct examination of the video records of operational and stagnant collectors, as well as the development of a model to predict glazing temperatures and an analysis of temporal intermittency of the images, both of which are critical to properly adjusting the IR camera for optimal performance. Many IR images and a video are presented to show the contrast between operating and stagnant collectors. The major conclusion is that the technique has potential to be applied by using an aircraft fitted with an IR camera that can fly over an area with installed SHW systems, thus recording the images. Subsequent analysis of the images can determine the operational condition of the fielded collectors. Specific recommendations are presented relative to the application of the technique, including ways to mitigate and manage potential sources of error.

He, Hongbo (University of New Mexico, Albuquerque, NM); Vorobieff, Peter V. (University of New Mexico, Albuquerque, NM); Menicucci, David (University of New Mexico, Albuquerque, NM); Mammoli, Andrea A. (University of New Mexico, Albuquerque, NM); Carlson, Jeffrey J.

2012-06-01T23:59:59.000Z

390

On Water Flow in Hot Fractured Rock -- A Sensitivity Study on the Impact of Fracture-Matrix Heat Transfer  

E-Print Network (OSTI)

phases stored in matrix pores, the energy E M contained in VEnough energy is transmitted from the matrix to effectivelyfor energy transfer from the adjacent hot rock matrix rather

Birkholzer, Jens T.; Zhang, Yingqi

2005-01-01T23:59:59.000Z

391

On Water Flow in Hot Fractured Rock -- A Sensitivity Study on the Impact of Fracture-Matrix Heat Transfer  

E-Print Network (OSTI)

for both liquid and heat transfer processes. In order to beprocesses in hot fractured rock with ( 1) flow channeling in fractures, (2) interface reduction in F-M heat transfer,

Birkholzer, Jens T.; Zhang, Yingqi

2005-01-01T23:59:59.000Z

392

Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A  

Open Energy Info (EERE)

Waters Along The Konocti Bay Fault Zone, Lake County, California- A Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Details Activities (3) Areas (1) Regions (0) Abstract: The Konocti Bay fault zone (KBFZ), initially regarded by some as a promising target for liquid-dominated geothermal systems, has been a disappointment. At least five exploratory wells were drilled in the vicinity of the KBFZ, but none were successful. Although the Na-K-Ca and Na-Li geothermometers indicate that the thermal waters discharging in the vicinity of Howard and Seigler Springs may have equilibrated at temperatures greater than 200°C, the spring temperatures and fluid

393

Engineering and economic evaluation of direct hot-water geothermal energy applications on the University of New Mexico campus. Final technical report  

DOE Green Energy (OSTI)

The potential engineering and economic feasibility of low-temperature geothermal energy applications on the campus of the University of New Mexico is studied in detail. This report includes three phases of work: data acquisition and evaluation, system synthesis, and system refinement and implementation. Detailed process designs are presented for a system using 190/sup 0/F geothermal water to substitute for the use of 135 x 10/sup 9/ Btu/y (141 TJ/y) of fossil fuels to provide space and domestic hot water heating for approximately 23% of the campus. Specific areas covered in the report include economic evaluation, environmental impact and program implementation plans.

Kauffman, D.; Houghton, A.V.

1980-12-31T23:59:59.000Z

394

Reactor hot spot analysis  

SciTech Connect

The principle methods for performing reactor hot spot analysis are reviewed and examined for potential use in the Applied Physics Division. The semistatistical horizontal method is recommended for future work and is now available as an option in the SE2-ANL core thermal hydraulic code. The semistatistical horizontal method is applied to a small LMR to illustrate the calculation of cladding midwall and fuel centerline hot spot temperatures. The example includes a listing of uncertainties, estimates for their magnitudes, computation of hot spot subfactor values and calculation of two sigma temperatures. A review of the uncertainties that affect liquid metal fast reactors is also presented. It was found that hot spot subfactor magnitudes are strongly dependent on the reactor design and therefore reactor specific details must be carefully studied. 13 refs., 1 fig., 5 tabs.

Vilim, R.B.

1985-08-01T23:59:59.000Z

395

Hot Springs | Open Energy Information  

Open Energy Info (EERE)

Springs Springs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Hot Springs Dictionary.png Hot Springs: A naturally occurring spring of hot water, heated by geothermal processes in the subsurface, and typically having a temperature greater than 37°C. Other definitions:Wikipedia Reegle Modern Geothermal Features Typical list of modern geothermal features Hot Springs Fumaroles Warm or Steaming Ground Mudpots, Mud Pools, or Mud Volcanoes Geysers Blind Geothermal System Mammoth Hot Springs at Yellowstone National Park (reference: http://www.hsd3.org/HighSchool/Teachers/MATTIXS/Mattix%20homepage/studentwork/Laura%20Cornelisse%27s%20Web%20Page/Yellowstone%20National%20Park.htm) Hot springs occur where geothermally heated waters naturally flow out of the surface of the Earth. Hot springs may deposit minerals and spectacular

396

Hydrogeochemical data for thermal and nonthermal waters and gases of the Valles Caldera- southern Jemez Mountains region, New Mexico  

DOE Green Energy (OSTI)

This report presents field, chemical, gas, and isotopic data for thermal and nonthermal waters of the southern Jemez Mountains, New Mexico. This region includes all thermal and mineral waters associated with Valles Caldera and many of those located near the Nacimiento Uplift, north of San Ysidro. Waters of the region can be categorized into five general types: (1) surface and near-surface meteoric waters; (2) acid-sulfate waters at Sulphur Springs (Valles Caldera); (3) thermal meteoric waters in the ring fracture zone (Valles Caldera); (4) deep geothermal waters of the Baca geothermal field and derivative waters in the Soda Dam and Jemez Springs area (Valles Caldera); and (5) mineralized waters near San Ysidro. Some waters display chemical and isotopic characteristics intermediate between the types listed. Data in this report will help in interpreting the geothermal potential of the Jemez Mountains region and will provide background for investigating problems in hydrology, structural geology, hydrothermal alterations, and hydrothermal solution chemistry.

Shevenell, L.; Goff, F.; Vuataz, F.; Trujillo, P.E. Jr.; Counce, D.; Janik, C.J.; Evans, W.

1987-03-01T23:59:59.000Z

397

Design of solar water-heater installations for seasonal users of thermal energy  

SciTech Connect

A mathematical model has been developed for a solar water-heating unit intended to be employed by seasonal users of thermal energy. The expected characteristics of such units are calculated for an ''average'' operating season.

Valyuzhinich, A.A.; Myshko, Yu.L.; Smirnov, S.I.

1980-01-01T23:59:59.000Z

398

The influence of non-isotropic scattering of thermal radiation on spectra of brown dwarfs and hot exoplanets  

E-Print Network (OSTI)

(abridged) We calculate near-infrared thermal emission spectra using a doubling-adding radiative transfer code, which includes scattering by clouds and haze. Initial temperature profiles and cloud optical depths are taken from the drift-phoenix brown dwarf model. We show that cloud particles change the spectrum compared to when clouds are ignored. The clouds reduce fluxes in the near-infrared spectrum and make it redder than for the clear sky case. We also show that not including scattering in the spectral calculations can result in errors on the spectra of many tens of percent, both in magnitude and in variations with wavelength. This is especially apparent for particles that are larger than the wavelength and only have little iron in them. Scattering particles will show deeper absorption features than absorbing (e.g. iron) particles and particle size will also affect the calculated infrared colours. Large particles also tend to be strongly forward-scattering, and we show that assuming isotropic scattering i...

de Kok, R J; Stam, D M; Woitke, P; Witte, S

2011-01-01T23:59:59.000Z

399

Preliminary screening of thermal storage concepts for water/steam and organic fluid solar thermal receiver systems  

DOE Green Energy (OSTI)

A preliminary comparison of thermal storage concepts for solar thermal applications was done generically for large and small solar systems with sensible and latent heat and two-stage storage concepts. Concepts were ranked based on the cost of delivered energy. A +- 20% uncertainty in subsystem cost was included in the analysis. Water/steam and organic fluid collector/receivers were studied separately. For the water/steam concept, Barstow technology (100 MW/sub e/) was examined. A nitrite/nitrate salt with a low-cost solid medium was best for buffer storage; for diurnal storage, the two-stage draw salt/low-cost media and oil/rock concept was best. Phase change concepts require improvements on the concept analyzed to be attractive. For the organic fluid system, a Shenandoah total energy system was examined. The Syltherm trickle charge taconite concept was the most favorable and may be improved by replacing the taconite with a lower-cost oil-compatible medium. Salt concepts can be competitive with this system only if there is a low-cost solid medium that is compatible with the salt and the end use requires a large amount of storage. The phase change concept examined was found to be quite poor for this total energy application.

Copeland, R.J.; Karpuk, M.E.; Ullman, J.L.

1980-04-01T23:59:59.000Z

400

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network (OSTI)

large quantities of hot water produced (1) as a by-productin one well and reservoir water is produced in another. Thesupply: produced from the aquifer. hot water is Spring (90

Tsang, C.-F.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Surface Water Sampling | Open Energy Information  

Open Energy Info (EERE)

Surface Water Sampling Surface Water Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Surface Water Sampling Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Water Sampling Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Water composition and source of fluids Thermal: Water temperature Dictionary.png Surface Water Sampling: Water sampling is done to characterize the chemical, thermal, or hydrological properties of a surface or subsurface aqueous system. Other definitions:Wikipedia Reegle Introduction Surface water sampling of hot and cold spring discharges has traditionally

402

Geothermal data for 95 thermal and nonthermal waters of the Valles Caldera - southern Jemez Mountains region, New Mexico  

DOE Green Energy (OSTI)

Field, chemical, and isotopic data for 95 thermal and nonthermal waters of the southern Jemez Mountains, New Mexico are presented. This region includes all thermal and mineral waters associated with Valles Caldera and many of those located near the Nacimiento Uplift, near San Ysidro. Waters of the region can be categorized into five general types: (1) surface and near surface meteoric waters; (2) acid-sulfate waters (Valles Caldera); (3) thermal meteoric waters (Valles Caldera); (4) deep geothermal and derivative waters (Valles Caldera); and (5) mineralized waters near San Ysidro. Some waters display chemical and isotopic characteristics intermediate between the types listed. The object of the data is to help interpret geothermal potential of the Jemez Mountains region and to provide background data for investigating problems in hydrology, structural geology, hydrothermal alterations, and hydrothermal solution chemistry.

Goff, F.; McCormick, Trujillo, P.E. Jr.; Counce, D.; Grigsby, C.O.

1982-05-01T23:59:59.000Z

403

Implementation plan for the demonstration of a 50,000 ft/sup 2/ solar hot water system for the textile industry. Final report  

DOE Green Energy (OSTI)

An analysis of textile processes was conducted to determine their applicability to integration into a 50,000 ft/sup 2/ collector field and into a waste heat recovery system. Various processes in a typical carpet finishing plant, a typical cotton/cotton blend finishing plant, and a typical 100% synthetic fabric pressurized beck finishing plant are analyzed. The flat-plate, evacuated tube, and parabolic concentrator are discussed and evaluated. Evaluations of direct heat exchange, closed cycle enhanced recovery, and open cycle enhanced heat recovery techniques as applied to textile processes are presented. Conceptual designs are discussed that use a solar array to produce hot water and use standard boilers to produce process steam and to augment the hot water output when insolation values are insufficient to meet process demands. Conceptual designs and cost estimates are presented for: process water systems with evacuated tube solar collectors; process water system with concentrating-tracking solar collectors; feedwater system with concentrating-tracking solar collectors; templifier and direct exchange waste heat recovery system; direct heat recovery systems; integrated system using enhanced heat recovery and concentrating-tracking solar collectors; integrated system using direct heat recovery and concentrating-tracking solar collectors; integrated system using direct heat recovery, evacuated tube solar collectors and concentrating-tracking solar collectors; and integrated system using enhanced heat recovery, evacuated tube collectors, and concentrating-tracking source collectors. An economic evaluation of the systems is presented using the rate of return method. Results and recommendations are summarized. (MCW)

Hester, J.C.; Beasley, D.E.; Rogers, W.A. Jr.

1980-08-01T23:59:59.000Z

404

Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen  

Open Energy Info (EERE)

Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Volcanic National Park Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Volcanic National Park Details Activities (2) Areas (1) Regions (0) Abstract: Meaningful applications of water geothermometry to thermal springs in and around Lassen Volcanic National Park (LVNP) are limited to Growler Hot Spring and Morgan Hot Springs. Most hot springs located within LVNP are low-chloride, acid-sulfate waters associated with nearby steam vents. This type of hot-spring activity is characteristically found above vapor-dominated hydrothermal systems. These acid-sulfate waters are not generally useful for liquid chemical geothermometry, however, because their

405

Thermal well-test method  

DOE Patents (OSTI)

A well-test method involving injection of hot (or cold) water into a groundwater aquifer, or injecting cold water into a geothermal reservoir. By making temperature measurements at various depths in one or more observation wells, certain properties of the aquifer are determined. These properties, not obtainable from conventional well test procedures, include the permeability anisotropy, and layering in the aquifer, and in-situ thermal properties. The temperature measurements at various depths are obtained from thermistors mounted in the observation wells.

Tsang, Chin-Fu (Albany, CA); Doughty, Christine A. (Berkeley, CA)

1985-01-01T23:59:59.000Z

406

Thermal-Structural Design of a Water Shield For Surface Reactor Missions  

SciTech Connect

Water shielding is an attractive option for an affordable lunar surface fission reactor program. The attractiveness of the water shielding option arises from the relative ease of proto-typing and ground testing, the relatively low development effort needed, as well as the fabrication and operating experience with stainless steel and water. The most significant limitation in using a water shield is temperature: to prevent the formation of voids and the consequent loss of cooling, the water temperature has to be maintained below the saturation temperature corresponding to the shield pressure. This paper examines natural convection for a prototypic water shield design using the computational fluid dynamics (CFD) code CFX-5 as well as analytical modeling. The results show that natural convection is adequate to keep the water well-mixed. The results also show that for the above-ground configuration, shield surface and water temperatures during lunar day conditions are high enough to require shield pressures up to 2.5 atm to prevent void formation. For the buried configuration, a set of ammonia heat pipes attached to the shield outer wall can be used to maintain water temperatures within acceptable limits. Overall the results show that water shielding is feasible for lunar surface applications. The results of the CFD analyses can also be used to guide development of testing plans for shield thermal testing. (authors)

Sadasivan, Pratap; Kapernick, Richard J.; Poston, David I. [D-5 Nuclear Systems Design Group MS K575, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)

2006-07-01T23:59:59.000Z

407

Geothermal-resource assessment of the Steamboat-Routt Hot Springs area, Colorado. Resources Series 22  

DOE Green Energy (OSTI)

An assessment of the Steamboat Springs region in northwest Colorado was initiated and carried out in 1980 and 1981. The goal of this program was to delineate the geological features controlling the occurrence of the thermal waters (temperatures in excess of 68/sup 0/F (20/sup 0/C)) in this area at Steamboat Springs and 8 miles (12.8 km) north at Routt Hot Springs. Thermal waters from Heart Spring, the only developed thermal water source in the study area, are used in the municipal swimming pool in Steamboat Springs. The assessment program was a fully integrated program consisting of: dipole-dipole, Audio-magnetotelluric, telluric, self potential and gravity geophysical surveys, soil mercury and soil helium geochemical surveys; shallow temperature measurements; and prepartion of geological maps. The investigation showed that all the thermal springs appear to be fault controlled. Based on the chemical composition of the thermal waters it appears that Heart Spring in Steamboat Springs is hydrologically related to the Routt Hot Springs. This relationship was further confirmed when it was reported that thermal waters were encountered during the construction of the new high school in Strawberry Park on the north side of Steamboat Springs. In addition, residents stated that Strawberry Park appears to be warmer than the surrounding country side. Geological mapping has determined that a major fault extends from the Routt Hot Springs area into Strawberry Park.

Pearl, R.H.; Zacharakis, T.G.; Ringrose, C.D.

1983-01-01T23:59:59.000Z

408

Chemical and hydrologic data for selected thermal-water wells and nonthermal springs in the Boise area, southwestern Idaho  

DOE Green Energy (OSTI)

This report presents data collected during January to July 1988 from 37 thermal-water wells and 3 nonthermal springs in the Boise area, southwestern Idaho. Included are well and spring locations; well-construction, water-level, and water-use information; hydrographs of water levels in 3 wells; chemical and isotopic analyses of water from 18 thermal-water wells and 3 nonthermal springs; and drillers' logs from 23 wells. The purpose of the report is to make these data conveniently available to the public. 5 figs., 3 tabs.

Young, H.W.; Parliman, D.J.; Mariner, R.H.

1988-01-01T23:59:59.000Z

409

Light-water-reactor coupled neutronic and thermal-hydraulic codes  

Science Conference Proceedings (OSTI)

An overview is presented of computer codes that model light water reactor cores with coupled neutronics and thermal-hydraulics. This includes codes for transient analysis and codes for steady state analysis which include fuel depletion and fission product buildup. Applications in nuclear design, reactor operations and safety analysis are given and the major codes in use in the USA are identified. The neutronic and thermal-hydraulic methodologies and other code features are outlined for three steady state codes (PDQ7, NODE-P/B and SIMULATE) and four dynamic codes (BNL-TWIGL, MEKIN, RAMONA-3B, RETRAN-02). Speculation as to future trends with such codes is also presented.

Diamond, D.J.

1982-01-01T23:59:59.000Z

410

Thermal Ion Dispersion | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Thermal Ion Dispersion Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Thermal Ion Dispersion Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Geochemical Data Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Thermal Ion Dispersion: Thermal Ion Dispersion (TID) is a method used by the precious-metals industry to determine the movement of hot, mineral-bearing waters through rocks, gravels, and soils. The survey involves collection of soil samples

411

The effect of load parameters on system thermal performance  

SciTech Connect

The effects of load size, load profile and hot water set temperature on system thermal performance are investigated in order to determine the relative importance of these design parameters in sizing a solar water heating system. The WATSUN IV computer program was used to introduce various load sizes, load profiles and set temperatures to a base model. The results indicate that variations in load size have a significant effect on the thermal performance of the system. However, variations in load profile and hot water set temperature seem to have no significant effect on system performance.

Vakili, M.

1984-02-01T23:59:59.000Z

412

Geologic setting and geochemistry of thermal water and geothermal assessment, Trans-Pecos Texas. Final report, June 1, 1976-May 31, 1977  

DOE Green Energy (OSTI)

Hot springs and wells in West Texas and adjacent Mexico are manifestations of active convective geothermal systems, concentrated in a zone along the Rio Grande between the Quitman Mountains and Big Bend National Park. Maximum temperatures are 47/sup 0/ and 72/sup 0/C for hot springs and wells in Texas and 90/sup 0/C for hot springs in Mexico within 5 km of the border. Existing information is summarized and the results of a 1-year intensive study of the area are presented. The study includes several overlapping phases: (1) compilation of existing geologic information, both regional studies of geology, structure and geophysics, and more detailed local studies of individual hot spring areas; (2) detailed geologic mapping of hot spring areas to understand the origin and geologic controls of hot springs; (3) field measurement and sampling of hot spring or well waters for geochemical analysis; and (4) synthesis and interpretation of the data.

Henry, C.D.

1977-01-01T23:59:59.000Z

413

Thermopolis hydrothermal system with an analysis of Hot Springs State Park  

Science Conference Proceedings (OSTI)

Thermopolis is the site of Hot Springs State Park, where numerous hot springs produce nearly 3000 gallons per minute (gpm) of 130/sup 0/F (54/sup 0/C) water. The University of Wyoming Geothermal Resource Assessment Group has studied a 1700-square-mile area centered roughly on the State Park. Available literature, bottom-hole temperatures from over 400 oil well logs, 62 oil field drill stem tests, the Wyoming State Engineer's water well files, 60 formation water analyses, thermal logs of 19 holes, and field investigations of geology and hydrology form the basis of this report.

Hinckley, B.S.; Heasler, H.P.; King, J.K.

1982-01-01T23:59:59.000Z

414

Detector of the flowing of a fluid in a pipe and energy saving device for a hot water system using this detector  

SciTech Connect

A fluid flow sensor, comprising a tubular element having a greater diameter than and vertically mounted on a pipe for serially interconnecting two portions of this pipe. One portion is connected to the upper end of the tubular element while the other portion is connected to its lower end. A magnetic piston is slidably mounted within the tubular element and is therefore free to move along it. A by-pass conduit interconnects the lower portion of the pipe with the upper portion of the pipe. The piston moves upwardly in the tubular element when the fluid flows. Fluid flows from the portion of the pipe connected at the lower end of the tubular element to the one connected at its upper end through the by-pass. The piston moves downwardly by gravity to the lower end of the tubular element when the fluid stops flowing. A coil wound around a portion of the tubular element produces in electrical signal when the piston moves in the tubular element. The piston has a frustroconical element on each end to absorb shocks which result when the piston seats in each position. This detecting device can be mounted on a hot water supply pipe and used in combination with an electronic circuit for saving energy in operating a hot water system. The electronic circuit allows or prevents the thermostat to control the water heating apparatus.

Lawless, J.

1985-02-05T23:59:59.000Z

415

Directly coupled solar thermal water pumping concepts for agriculture. Final report, October 1978-May 1979  

DOE Green Energy (OSTI)

The directly coupled solar thermal water pumping system has been analyzed for both performance and cost. Performance estimates for a real operating system exceed 8% for the typical environmental conditions expected. The cost of such a system, using currently available flat-panel collectors, is highly competitive with alternative, remote location, water pumping systems. Although the system has a fairly low relative cost, there are areas such as valve and actuator cost that have a high potential for reducing system cost, especially for smaller systems. The performance of the system can be improved by high-performance, moderate-temperature collectors such as evacuated glass tubes. The advantages of the directly coupled solar thermal system are simplicity and limited failure modes. Results of the experimental phase indicate that the analytic models provide an accurate estimate of achievable system performance.

Scharlack, R S

1979-01-01T23:59:59.000Z

416

Deep water pipe, pump, and mooring study: Ocean Thermal Energy Conversion program. Final report  

DOE Green Energy (OSTI)

The ocean engineering issues affecting the design, construction, deployment, and operation of Ocean Thermal Energy Conversion (OTEC) power plants are of key importance. This study addressed the problems associated with the conceptual design of the deep-water pipe, cold-water-pumping, and platform mooring arrangements. These subsystems fall into a natural grouping since the parameters affecting their design are closely related to each other and to the ocean environment. Analysis and evaluations are provided with a view toward judging the impact of the various subsystems on the overall plant concept and to provide an estimate of material and construction cost. Parametric data is provided that describes mooring line configurations, mooring line loads, cold water pipe configurations, and cold water pumping schemes. Selected parameters, issues, and evaluation criteria are used to judge the merits of candidate concepts over a range of OTEC plant size from 100 MWe to 1000 MWe net output power.

Little, T.E.; Marks, J.D.; Wellman, K.H.

1976-06-01T23:59:59.000Z

417

EXPERIMENTAL EVALUATION OF THE THERMAL PERFORMANCE OF A WATER SHIELD FOR A SURFACE POWER REACTOR  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 C. The CFD model with 1/6-g predicts a maximum water temperature of 88 C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

REID, ROBERT S. [Los Alamos National Laboratory; PEARSON, J. BOSIE [Los Alamos National Laboratory; STEWART, ERIC T. [Los Alamos National Laboratory

2007-01-16T23:59:59.000Z

418

Experimental Evaluation of the Thermal Performance of a Water Shield for a Surface Power Reactor  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 deg. C. The CFD model with 1/6-g predicts a maximum water temperature of 88 deg. C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

Pearson, J. Boise; Stewart, Eric T. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Reid, Robert S. [Los Alamos National Laboratory, Los Alamos, NM 87544 (United States)

2007-01-30T23:59:59.000Z

419

Peak Load Shifting by Thermal Energy Storage  

Science Conference Proceedings (OSTI)

This technical update from the Electric Power Research Institute (EPRI) reviews the technology of storing energy in hot water and explores the potential for implementing this form of thermal energy storagethrough means of smart electric water heatersas a way to shift peak load on the electric grid. The report presents conceptual background, discusses strategies for peak load shifting and demand response, documents a series of laboratory tests conducted on a representative model of smart water heater, and...

2011-12-14T23:59:59.000Z

420

Hot Dry Rock Geothermal Energy Development Program  

DOE Green Energy (OSTI)

During Fiscal Year 1987, emphasis in the Hot Dry Rock Geothermal Energy Development Program was on preparations for a Long-Term Flow Test'' of the Phase II'' or Engineering'' hot dry rock energy system at Fenton Hill, New Mexico. A successful 30-day flow test of the system during FY86 indicated that such a system would produce heat at a temperature and rate that could support operation of a commercial electrical power plant. However, it did not answer certain questions basic to the economics of long-term operation, including the rate of depletion of the thermal reservoir, the rate of water loss from the system, and the possibility of operating problems during extended continuous operation. Preparations for a one-year flow test of the system to answer these and more fundamental questions concerning hot dry rock systems were made in FY87: design of the required surface facilities; procurement and installation of some of their components; development and testing of slimline logging tools for use through small-diameter production tubing; research on temperature-sensitive reactive chemical tracers to monitor thermal depletion of the reservoir; and computer simulations of the 30-day test, extended to modeling the planned Long-Term Flow Test. 45 refs., 34 figs., 5 tabs.

Smith, M.C.; Hendron, R.H.; Murphy, H.D.; Wilson, M.G.

1989-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal hot water" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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421

Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) |  

Open Energy Info (EERE)

Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Exploration Activity Details Location Upper Hot Creek Ranch Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Ten water samples were collected for chemical analysis and interpretation. Analyses of three samples of the UHCR thermal give predicted subsurface temperatures ranging from 317 to 334 oF from the Na-K-Ca, silica (quartz), and Na-Li geothermometers. The fact that all three thermometers closely agree gives the predictions added credibility. References Dick Benoit, David Blackwell (2006) Exploration Of The Upper Hot

422

Assessment of MTI Water Temperature Thermal Discharge Retrievals with Ground Truth  

Science Conference Proceedings (OSTI)

Surface water temperatures calculated from Multispectral Thermal Imager (MTI) brightness temperatures and the robust retrieval algorithm, developed by the Los Alamos National Laboratory (LANL), are compared with ground truth measurements at a mid-latitude cold-water site along the Atlantic coast near Plymouth, MA. In contrast to the relative uniformity of the sea-surface temperature in the open ocean the water temperature near Pilgrim exhibits strong spatial gradients and temporal variability. This made it critical that all images be accurately registered in order to extract temperature values at the six buoy locations. Sixteen images during a one-year period from August 2000 to July 2001 were selected for the study. The RMS error of Pilgrim water temperature is about 3.5 C for the 4 buoys located in open water. The RMS error of the combined temperatures from 3 of the open-water buoys is 2.8 C. The RMS error includes errors in the ground truth. The magnitude of this error is estimated to range between 0.8 and 2.3 C. The two main components of this error are warm-layer effect and spatial variability. The actual error in the MTI retrievals for Pilgrim daytime conditions is estimated to be between 2.7 and 3.4 C for individual buoys and between 1.7 and 2.7 C for the combined open-water buoys.

Kurzeja, R.J.

2002-12-06T23:59:59.000Z

423

Concentrated solar thermal (cst) system for fuelwood replacement and for household water sanitation in developing countries.  

DOE Green Energy (OSTI)

Concentrated Solar Thermal (CST) is a proven renewable energy technology that harnesses solar irradiation in its most primitive form. This technology with roots in ancient history is growing at a fast pace in recent times. Developing countries could use CST to solve fundamental human-needs challenges, such as for the substitution of fuelwood and the treatment of water for household use. This paper proposes a conceptual design for a standardized modular CST for these applications in developing countries. A modular-designed parabolic CST with an aperture area of 7.5 m2 is adequate to provide enough solar thermal energy to replace the fuelwood need (5 tons/yr) or to pasteurize the minimum daily water requirement (2500 liters) for a household. Critical parameters of the CST are discussed and an affordable solid thermal storage is recommended to be used as a backup when sunlight is unavailable. A funding program that includes in-country resources and external funding will be needed to sustain the development and wide spread adaptation of this technology.

Akinjiola, O. P.; Balachandran, U. (Energy Systems); (Rsage Research, LLC)

2012-01-01T23:59:59.000Z

424

SOLERAS - Solar-Powered Water Desalination Project at Yanbu: Thermal energy storage tests  

Science Conference Proceedings (OSTI)

The solar-powered water desalination pilot plant at Yanbu in the Kingdom of Saudi Arabia is a unique project in terms of its size, purpose, objectives, and scope. The plant uses a combination of solar thermal energy and fossil-fuel energy to provide the shaft horsepower necessary to operate the indirect heat-transfer freeze desalination process developed and patented by Chicago Bridge and Iron Inc. (CBandI) to produce potable water. The thermal storage acts as a buffer between the energy collection subsystem and the energy delivery subsystem. This report describes the thermal storage subsystem. One of the objectives of the desalination research project is to publish a series of reports on the performance of its various subsystems. The authors of this report do not claim that it is exhaustive and complete in all respects, for more than one reason. Any research activity is like an open-ended problem and during the tenure of its investigation it raises more problems than can be solved. However, the authors believe that the storage system behavior has posed no serious problem and that the report adequately covers all the facets of the investigation. 3 refs., 5 figs., 3 tabs.

Not Available

1987-04-01T23:59:59.000Z

425

Study of Water Speed Sensitivity in a Multifunctional Thick-film Sensor by Analytical Thermal Simulations and Experiments  

E-Print Network (OSTI)

The present paper deals with an application of the analytical thermal simulator DJOSER. It consist of the characterization of a water speed sensor realized in hybrid technology. The capability of the thermal solver to manage the convection heat exchange and the effects of the passivating layers make the simulation work easy and fast.

F. Stefani; P. E. Bagnoli; S. Luschi

2008-01-07T23:59:59.000Z

426

Thermal Monitoring Approaches for Energy Savings Verification  

E-Print Network (OSTI)

This paper reviews and summarizes techniques for monitoring thermal energy flows for the purpose of verifying energy savings in industrial and large institutional energy conservation projects. Approaches for monitoring hot and chilled water, steam, steam condensate and boiler feedwater in large facilities are described. Insights gained and lessons learned through the actual in-field installation of thermal monitoring equipment for energy savings verification purposes at over 100 sites at various locations throughout the United States are presented.

McBride, J. R.; Bohmer, C. J.; Lippman, R. H.; Zern, M. J.

1996-04-01T23:59:59.000Z

427

Energy and economic assessment of desiccant cooling systems coupled with single glazed air and hybrid PV/thermal solar collectors for applications in hot and humid climate  

SciTech Connect

This paper presents a detailed analysis of the energy and economic performance of desiccant cooling systems (DEC) equipped with both single glazed standard air and hybrid photovoltaic/thermal (PV/t) collectors for applications in hot and humid climates. The use of 'solar cogeneration' by means of PV/t hybrid collectors enables the simultaneous production of electricity and heat, which can be directly used by desiccant air handling units, thereby making it possible to achieve very energy savings. The present work shows the results of detailed simulations conducted for a set of desiccant cooling systems operating without any heat storage. System performance was investigated through hourly simulations for different systems and load combinations. Three configurations of DEC systems were considered: standard DEC, DEC with an integrated heat pump and DEC with an enthalpy wheel. Two kinds of building occupations were considered: office and lecture room. Moreover, three configurations of solar-assisted air handling units (AHU) equipped with desiccant wheels were considered and compared with standard AHUs, focusing on achievable primary energy savings. The relationship between the solar collector's area and the specific primary energy consumption for different system configurations and building occupation patterns is described. For both occupation patterns, sensitivity analysis on system performance was performed for different solar collector areas. Also, this work presents an economic assessment of the systems. The cost of conserved energy and the payback time were calculated, with and without public incentives for solar cooling systems. It is worth noting that the use of photovoltaics, and thus the exploitation of related available incentives in many European countries, could positively influence the spread of solar air cooling technologies (SAC). An outcome of this work is that SAC systems equipped with PV/t collectors are shown to have better performance in terms of primary energy saving than conventional systems fed by vapour compression chillers and coupled with PV cells. All SAC systems present good figures for primary energy consumption. The best performances are seen in systems with integrated heat pumps and small solar collector areas. The economics of these SAC systems at current equipment costs and energy prices are acceptable. They become more interesting in the case of public incentives of up to 30% of the investment cost (Simple Payback Time from 5 to 10 years) and doubled energy prices. (author)

Beccali, Marco; Finocchiaro, Pietro; Nocke, Bettina [Universita degli Studi di Palermo, Palermo (Italy)

2009-10-15T23:59:59.000Z

428

Solar Thermal Incentive Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Thermal Incentive Program Solar Thermal Incentive Program Solar Thermal Incentive Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate 50% of the project cost Program Info Funding Source Public Benefits Fund State Connecticut Program Type State Rebate Program Rebate Amount Calculated: $70 multiplied by the SRCC "C" rating multiplied by the number of collectors multiplied by the Shading Factor Provider Clean Energy Finance and Investment Authority Note: This program is not currently accepting applications. Check the program web site for information regarding future financing programs. To participate in the residential solar hot water rebate, homeowners must first complete an energy assessment. Then, they must work with CEFIA

429

Experimental comparison of hot water/propane injection to steam/propane injection for recovery of heavy oil.  

E-Print Network (OSTI)

??Generating enough heat to convert water into steam is a major expense for projects that inject steam into reservoirs to enhance hydrocarbon recovery. If the… (more)

Nesse, Thomas

2005-01-01T23:59:59.000Z

430

Final Report: Development of a Thermal and Water Management System for PEM Fuel Cell  

DOE Green Energy (OSTI)

This final program report is prepared to provide the status of program activities performed over the period of 9 years to develop a thermal and water management (TWM) system for an 80-kW PEM fuel cell power system. The technical information and data collected during this period are presented in chronological order by each calendar year. Balance of plant (BOP) components of a PEM fuel cell automotive system represents a significant portion of total cost based on the 2008 study by TIAX LLC, Cambridge, MA. The objectives of this TWM program were two-fold. The first objective was to develop an advanced cooling system (efficient radiator) to meet the fuel cell cooling requirements. The heat generated by the fuel cell stack is a low-quality heat (small difference between fuel cell stack operating temperature and ambient air temperature) that needs to be dissipated to the ambient air. To minimize size, weight, and cost of the radiator, advanced fin configurations were evaluated. The second objective was to evaluate air humidification systems which can meet the fuel cell stack inlet air humidity requirements. The moisture from the fuel cell outlet air is transferred to inlet air, thus eliminating the need for an outside water source. Two types of humidification devices were down-selected: one based on membrane and the other based on rotating enthalpy wheel. The sub-scale units for both of these devices have been successfully tested by the suppliers. This project addresses System Thermal and Water Management.

Zia Mirza, Program Manager

2011-12-06T23:59:59.000Z

431

Analysis of community solar systems for combined space and domestic hot water heating using annual cycle thermal energy storage  

DOE Green Energy (OSTI)

A simplified design procedure is examined for estimating the storage capacity and collector area for annual-cycle-storage, community solar heating systems in which 100% of the annual space heating energy demand is provided from the solar source for the typical meteorological year. Hourly computer simulations of the performance of these systems were carried out for 10 cities in the United States for 3 different building types and 4 community sizes. These permitted the use of design values for evaluation of a more simplified system sizing method. Results of this study show a strong correlation between annual collector efficiency and two major, location-specific, annual weather parameters: the mean air temperature during daylignt hours and the total global insolation on the collector surface. Storage capacity correlates well with the net winter load, which is a measure of the seasonal variation in the total load, a correlation which appears to be independent of collector type.

Hooper, F.C.; McClenahan, J.D.; Cook, J.D.; Baylin, F.; Monte, R.; Sillman, S.

1980-01-01T23:59:59.000Z

432

Heat-pump desuperheaters for supplying domestic hot water - estimation of energy savings and economic viability for residential applications  

SciTech Connect

The heat reclaimer is a double-wall heat exchange system that removes superheat from the heat pump (or central air conditioning) cycle and uses it to heat water for domestic uses. During summer operation, this heat would normally be rejected to the atmosphere without being used. Thus, water heating is accomplished using essentially no primary fuel. In winter, the heat extracted from the cycle would have been used for space heating. However, energy savings are possible above the heat pump balance point because water heating is performed at an enhanced efficiency. Potential energy savings and economic viability of the heat reclaimer were determined for 28 sites throughout the United States. These results indicate that the heat reclaimer is not economically attractive compared with gas- or oil-fired water heating systems. However, it is competitive with electric resistance water heaters. Based on these results, a calculational scheme has been developed that could be integrated into the model audit procedure.

Olszewski, M.; Fontana, E.C.

1983-05-01T23:59:59.000Z

433

Atmospheric Condensation Potential of Windows in Hot, Humid Climates  

E-Print Network (OSTI)

In hot, humid climates, the internal surfaces of windows in air-conditioned buildings are in contact with relatively colder air. Meanwhile, the external surfaces are exposed to hot humid atmospheric air. This hygro-thermal condition may cause frequent atmospheric condensation on external surfaces of windows when their surface temperature drops below the dew point temperature of the hot humid air. To date, external surface condensation on windows has been given relatively much less importance than their internal surface condensation. In addition, the thermal analysis of windows in hot humid climates has always been performed in the absence of condensation. Under moderate air temperature and humidity conditions, such practice is acceplable. However, when windows experience atmospheric condensation on their external surfaces, the effect of condensation on window energy loss needs to be examined. In this paper, the external condensation process is analyzed and the atmospheric water vapor mass condensation rate has been obtained by utilizing a simplified transient uni-dimensional finite difference model. The results show that this model has enhanced the assessment of the potential for atmospheric condensation on windows in hot, humid climates and in predicting the amount of condensation expected, as well as the associated energy loss for given thermal and moisture conditions. The numerical computation of the model is able to account for condensation and its impact on the temperature gradient across the window. Thermal analysis of both single and insulated double-glazed windows under condensation conditions is presented. The work also includes the computational procedure used and the results or a case study demonstrating the model's capabilities.

El Diasty, R.; Budaiwi, I.

1992-05-01T23:59:59.000Z

434

Economical Analysis of a Groundwater Source Heat Pump with Water Thermal Storage System  

E-Print Network (OSTI)

The paper is based on a chilled and heat source for the building which has a total area of 140000m2 in the suburb of Beijing. By comparing the groundwater source heat pump of water thermal storage (GHPWTS) with a conventional chilled and heat source scheme in economical, technical, and environmental aspects, it is determined that the scheme of the groundwater source heat pump has better energy efficiency than others. The GHPWTS can take full advantage of the heat source from groundwater and benefit of electricity difference pricing during a day. Its character is a combination of a strength and another strength. It is the lowest cycle cost of all chide and heat source schemes. The GHPWTS has the best economic benefit and runs stably and reliably. Its advantage is clearly compared with other schemes. There is a real value for the project that is similar to the characteristic of this project and the condition of the water source.

Zhou, Z.; Xu, W.; Li, J.; Zhao, J.; Niu, L.

2006-01-01T23:59:59.000Z

435

Hot Leg Piping Materials Issues  

SciTech Connect

With Naval Reactors (NR) approval of the Naval Reactors Prime Contractor Team (NRPCT) recommendation to develop a gas cooled reactor directly coupled to a Brayton power conversion system as the space nuclear power plant (SNPP) for Project Prometheus (References a and b) the reactor outlet piping was recognized to require a design that utilizes internal insulation (Reference c). The initial pipe design suggested ceramic fiber blanket as the insulation material based on requirements associated with service temperature capability within the expected range, very low thermal conductivity, and low density. Nevertheless, it was not considered to be well suited for internal insulation use because its very high surface area and proclivity for holding adsorbed gases, especially water, would make outgassing a source of contaminant gases in the He-Xe working fluid. Additionally, ceramic fiber blanket insulating materials become very friable after relatively short service periods at working temperatures and small pieces of fiber could be dislodged and contaminate the system. Consequently, alternative insulation materials were sought that would have comparable thermal properties and density but superior structural integrity and greatly reduced outgassing. This letter provides technical information regarding insulation and materials issues for the Hot Leg Piping preconceptual design developed for the Project Prometheus space nuclear power plant (SNPP).

V. Munne

2006-07-19T23:59:59.000Z

436

Performance Comparison of Residential Hot Water Systems; Period of Performance: January 30, 2001 through July 29, 2002  

DOE Green Energy (OSTI)

A laboratory test experiment was conducted to measure the energy performance of two different types of water heaters--electric storage tank and demand (tankless)--in two types of plumbing distribution systems--copper piping in a tree configuration and cross-linked polyethylene (PEX) piping in a parallel configuration. Two water-usage patterns were used in the week-long experiments and in the annual simulations: one representing a high-usage home and the other representing a low-usage home. Results of weekly performance testing and annual simulations of electric water-heating systems are presented.

Wiehagen, J.; Sikora, J. L.

2003-03-01T23:59:59.000Z

437

Korean Development of Advanced Thermal-Hydraulic Codes for Water Reactors and HTGRs: Space and Gamma  

Science Conference Proceedings (OSTI)

Technical Paper / Special Issue on the 14th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-14) / Thermal Hydraulics

Hee Cheon No; Sang Jun Ha; Kyung Doo Kim; Hong Sik Lim; Eo Hwak Lee; Hyung Gon Jin

438

Hot air drum evaporator  

DOE Patents (OSTI)

An evaporation system for aqueous radioactive waste uses standard 30 and 55 gallon drums. Waste solutions form cascading water sprays as they pass over a number of trays arranged in a vertical stack within a drum. Hot dry air is circulated radially of the drum through the water sprays thereby removing water vapor. The system is encased in concrete to prevent exposure to radioactivity. The use of standard 30 and 55 gallon drums permits an inexpensive compact modular design that is readily disposable, thus eliminating maintenance and radiation build-up problems encountered with conventional evaporation systems.

Black, Roger L. (Idaho Falls, ID)

1981-01-01T23:59:59.000Z

439

Industrial applications of hot dry rock geothermal energy  

DOE Green Energy (OSTI)

Geothermal resources in the form of naturally occurring hot water or steam have been utilized for many years. While these hydrothermal resources are found in many places, the general case is that the rock at depth is hot, but does not contain significant amounts of mobile fluid. An extremely large amount of geothermal energy is found around the world in this hot dry rock (HDR). Technology has been under development for more than twenty years at the Los Alamos National Laboratory in the United States and elsewhere to develop the technology to extract the geothermal energy from HDR in a form useful for electricity generation, space heating, or industrial processing. HDR technology is especially attractive for industrial applications because of the ubiquitous distribution of the HDR resource and the unique aspects of the process developed to recover it. In the HDR process, as developed at Los Alamos, water is pumped down a well under high pressure to open up natural joints in hot rock and create an artificial geothermal reservoir. Energy is extracted by circulating water through the reservoir. Pressurized hot water is returned to the surface through the production well, and its thermal energy is extracted for practical use. The same water is then recirculated through the system to mine more geothermal heat. Construction of a pilot HDR facility at Fenton Hill, NM, USA, has recently been completed by the Los Alamos National Laboratory. It consists of a large underground reservoir, a surface plant, and the connecting wellbores. This paper describes HDR technology and the current status of the development program. Novel industrial applications of geothermal energy based on the unique characteristics of the HDR energy extraction process are discussed.

Duchane, D.V.

1992-09-01T23:59:59.000Z

440

Industrial applications of hot dry rock geothermal energy  

DOE Green Energy (OSTI)

Geothermal resources in the form of naturally occurring hot water or steam have been utilized for many years. While these hydrothermal resources are found in many places, the general case is that the rock at depth is hot, but does not contain significant amounts of mobile fluid. An extremely large amount of geothermal energy is found around the world in this hot dry rock (HDR). Technology has been under development for more than twenty years at the Los Alamos National Laboratory in the United States and elsewhere to develop the technology to extract the geothermal energy from HDR in a form useful for electricity generation, space heating, or industrial processing. HDR technology is especially attractive for industrial applications because of the ubiquitous distribution of the HDR resource and the unique aspects of the process developed to recover it. In the HDR process, as developed at Los Alamos, water is pumped down a well under high pressure to open up natural joints in hot rock and create an artificial geothermal reservoir. Energy is extracted by circulating water through the reservoir. Pressurized hot water is returned to the surface through the production well, and its thermal energy is extracted for practical use. The same water is then recirculated through the system to mine more geothermal heat. Construction of a pilot HDR facility at Fenton Hill, NM, USA, has recently been completed by the Los Alamos National Laboratory. It consists of a large underground reservoir, a surface plant, and the connecting wellbores. This paper describes HDR technology and the current status of the development program. Novel industrial applications of geothermal energy based on the unique characteristics of the HDR energy extraction process are discussed.

Duchane, D.V.

1992-01-01T23:59:59.000Z

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