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Note: This page contains sample records for the topic "hot water heater" 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

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

2

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

3

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

4

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...

5

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

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

Water heater heat reclaimer  

SciTech Connect

This invention relates to the conservation of energy in a domestic gas water heater by utilizing the hot exhaust gases in a gas water heater for the preheating of the incoming unheated water into the water heater. The exhaust gases from a domestic gas water heater carry wasted heat and the present invention provides a mean to reclaim part of the wasted heat for the preheating of the incoming unheated water during hot water usage periods. During non hot water usage periods the heat in the exhaust gases is not reclaimed to prevent overheating of the water and also to prevent the formation of water deposit in the preheating assembly or heat reclaimer. During the non hot water usage periods the heat produced in the water heater is normally needed only to maintain the desired water temperature of the stored water in the water tank of the water heater. Due to the rapid heating or recovery rate, the present invention enables the use of a smaller water heater. The use of a smaller water heater reduces the normal heat loss from the stored hot water thereby further reduces energy consumption.

Wie, C.T.

1983-08-09T23:59:59.000Z

14

Tankless Demand Water Heaters  

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

Demand (tankless or instantaneous) water heaters have heating devices that are activated by the flow of water, so they provide hot water only as needed and without the use of a storage tank. They...

15

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

16

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

17

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

18

Instantaneous gas water heater  

SciTech Connect

Hot water supply temperature is set by a temperature setting device in response to an instantaneous flow rate signal from a water flow rate sensor arranged in a water supply pipe and a feeding water temperature signal from a feeding water temperature sensor which are compared with a predetermined hot water supply temperature and calculated in a control unit. A proportional valve and other devices in a gas supply pipe are controlled in response to the result of the comparison and calculation to define a required volume of gas for ignition and heating. At the same time, a fan damper is controlled by a damper control device so as to adjust the volume of combustion air. A signal representing discharging hot water temperature from a discharging hot water temperature sensor arranged in a hot water feeding pipe is fed back to the control unit and calculated therein, and a valve in the hot water supply pipe is adjusted in response to the result of calculation to attain the desired hot water supply temperature. In order to prevent freezing in the system in winter season, a signal from a thermostat in the water feeding pipe is transmitted to a heater arranged in an air supply chamber so as to heat a heat exchanger pipe and, at the same time, heaters arranged in the water feeding pipe and the hot water supply pipe are also controlled to prevent freezing.

Tsutsui, O.; Kuwahara, H.; Murakami, Sh.; Yasunaga, Sh.

1985-02-26T23:59:59.000Z

19

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...

20

Pre-heater for water heater  

SciTech Connect

This patent describes an apparatus for pre-heating water prior to the water entering a conventional water heater comprising: heat exchanger means located inside the attic of a residential dwelling for effecting a heat exchange between hot air; vent pipe means connected to the continuous pipe; drain pipe means connected to the continuous pipe; fourth pipe means connected to the drain pipe means; fifth pipe means connected to the junction of the fourth pipe means; and the water heater means connected to the outlet of the heat exchanger means.

Blount, E.R.

1987-06-09T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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

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

22

Conventional Storage Water Heaters  

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

Conventional storage water heaters remain the most popular type of water heating system for homes and buildings.

23

Water Heaters | Open Energy Information  

Open Energy Info (EERE)

Heaters Jump to: navigation, search TODO: Add description List of Water Heaters Incentives Retrieved from "http:en.openei.orgwindex.php?titleWaterHeaters&oldid267202...

24

Selecting a new water heater  

SciTech Connect

This fact sheet describes the types of water heaters available (storage water heaters, demand water heaters, heat pump water heaters, tankless coil and indirect water heaters, and solar water heaters). The criteria for selection are discussed. These are capacity, efficiency rating, and cost. A resource list is provided for further information.

NONE

1995-03-01T23:59:59.000Z

25

Solar Water Heater Basics | Department of Energy  

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

Solar Water Heater Basics Solar Water Heater Basics Solar Water Heater Basics August 19, 2013 - 3:01pm Addthis Illustration of an active, closed loop solar water heater. A large, flat panel called a flat plate collector is connected to a tank called a solar storage/backup water heater by two pipes. One of these pipes runs through a cylindrical pump into the bottom of the tank, where it becomes a coil called a double-wall heat exchanger. This coil runs up through the tank and out again to the flat plate collector. Antifreeze fluid runs only through this collector loop. Two pipes run out the top of the water heater tank; one is a cold water supply into the tank, and the other sends hot water to the house. Solar water heaters use the sun's heat to provide hot water for a home or

26

ELDON water heater  

SciTech Connect

Experience with the installation of an ELDON water heater in the TLC Services, Inc. laundry facility is reported. Piping diagram and pictures are included. (MHR)

Wood, H.E.

1980-07-18T23:59:59.000Z

27

Water heater secondary control device  

SciTech Connect

A secondary control device for gas water heaters is described having a tank, cold water inlet, hot water outlet and a heater thermostat, the control device comprising: valve means for controlling the flow of gas from a source thereof to the heater thermostat, the valve means connected between the gas source and the heater thermostat; means attached to the outside of the cold water inlet for sensing the temperature of water in the cold water inlet and providing an electrical signal representative thereof, the signal generated by the temperature sensing means being connected to the valve means; means for opening the valve means for transmitting the gas to the heater thermostat when the signal is representative of the temperature of the cold water being less than a predetermined temperature; and means for closing the valve means for preventing transmission of the energy to the heater thermostat when the signal is representative of the temperature of the cold water being equal to or greater than the predetermined temperature.

Subherwal, B.R.

1987-08-18T23:59:59.000Z

28

Tankless or Demand-Type Water Heaters | Department of Energy  

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

Tankless or Demand-Type Water Heaters Tankless or Demand-Type Water Heaters Tankless or Demand-Type Water Heaters May 2, 2012 - 6:47pm Addthis Diagram of a tankless water heater. Diagram of a tankless water heater. How does it work? Tankless water heaters deliver hot water as it is needed, eliminating the need for storage tanks. Tankless water heaters, also known as demand-type or instantaneous water heaters, provide hot water only as it is needed. They don't produce the standby energy losses associated with storage water heaters, which can save you money. Here you'll find basic information about how they work, whether a tankless water heater might be right for your home, and what criteria to use when selecting the right model. Check out the Energy Saver 101: Water Heating infographic to learn if a tankless water heater is right for you.

29

Water Heater Safety FAQs  

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

from 30 gallons to 80 gallons in a variety of fuel sources (gas, electric, liquid propane). We also offer a wide selection of Rheem gas and electric tankless water heaters....

30

Tankless Coil and Indirect Water Heaters | Department of Energy  

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

Tankless Coil and Indirect Water Heaters Tankless Coil and Indirect Water Heaters Tankless Coil and Indirect Water Heaters May 16, 2013 - 7:21pm Addthis An indirect water heater. An indirect water heater. How does it work? Tankless coil and indirect water heaters use your home's heating system to heat water. Tankless coil and indirect water heaters use a home's space heating system to heat water. They're part of what's called integrated or combination water and space heating systems. How They Work A tankless coil water heater provides hot water on demand without a tank. When a hot water faucet is turned on, water is heated as it flows through a heating coil or heat exchanger installed in a main furnace or boiler. Tankless coil water heaters are most efficient during cold months when the heating system is used regularly but can be an inefficient choice for many

31

Gas Water Heater Energy Losses  

E-Print Network (OSTI)

analyses of storage-type water heaters. 2 TANK modelswater heater as part of the DOE rulemaking analysis. We used the most current version of this model--

Biermayer, Peter

2012-01-01T23:59:59.000Z

32

Solar Water Heaters | Department of Energy  

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

Solar Water Heaters Solar Water Heaters Solar Water Heaters May 7, 2012 - 9:52am Addthis Solar water heaters -- also called solar domestic hot water systems -- can be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel they use -- sunshine -- is free. How They Work Solar water heating systems include storage tanks and solar collectors. There are two types of solar water heating systems: active, which have circulating pumps and controls, and passive, which don't. Active Solar Water Heating Systems There are two types of active solar water heating systems: Direct circulation systems Pumps circulate household water through the collectors and into the home. They work well in climates where it rarely freezes. Indirect circulation systems

33

Solar water heaters | Open Energy Information  

Open Energy Info (EERE)

heaters heaters Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of Solar Water Heating technology.)[1] Solar Water Heater One of the most cost-effective ways to include renewable technologies into a building is by incorporating solar hot water. A typical residential solar water-heating system reduces the need for conventional water heating by about two-thirds. It minimizes the expense of electricity or fossil fuel to heat the water and reduces the associated environmental impacts. Solar Water Heating for Buildings Most solar water-heating systems for buildings have two main parts: (1) a solar collector and (2) a storage tank. The most common collector used in solar hot water systems is the flat-plate collector. Solar water heaters use the sun to heat either water

34

Sizing a New Water Heater | Department of Energy  

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

Sizing a New Water Heater Sizing a New Water Heater Sizing a New Water Heater May 29, 2012 - 7:16pm Addthis Is your water heater the right size for you house? | Photo credit ENERGY STAR® Is your water heater the right size for you house? | Photo credit ENERGY STAR® A properly sized water heater will meet your household's hot water needs while operating more efficiently. Therefore, before purchasing a water heater, make sure it's the correct size. Here you'll find information about how to size these systems: Tankless or demand-type water heaters Solar water heating system Storage and heat pump (with tank) water heaters. For sizing combination water and space heating systems -- including some heat pump systems, and tankless coil and indirect water heaters -- consult a qualified contractor.

35

Selecting a New Water Heater | Department of Energy  

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

Selecting a New Water Heater Selecting a New Water Heater Selecting a New Water Heater August 29, 2012 - 7:30pm Addthis Water heater testing facility at Oak Ridge National Laboratory. Water heater testing facility at Oak Ridge National Laboratory. When selecting a new water heater for your home, choose a water heating system that will not only provide enough hot water but also that will do so energy efficiently, saving you money. This includes considering the different types of water heaters available and determining the right size and fuel source for your home. Check out the Energy Saver 101: Water Heating infographic to learn more about the different types of water heaters and how to select the right model for your home. Types of Water Heaters It's a good idea to know the different types of water heaters available

36

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

37

Solar water heaters | Open Energy Information  

Open Energy Info (EERE)

water heaters water heaters (Redirected from - Solar Hot Water) Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of Solar Water Heating technology.)[1] Solar Water Heater One of the most cost-effective ways to include renewable technologies into a building is by incorporating solar hot water. A typical residential solar water-heating system reduces the need for conventional water heating by about two-thirds. It minimizes the expense of electricity or fossil fuel to heat the water and reduces the associated environmental impacts. Solar Water Heating for Buildings Most solar water-heating systems for buildings have two main parts: (1) a solar collector and (2) a storage tank. The most common collector used in solar hot water systems is the

38

GeoSprings Hybrid Water Heater - Energy Innovation Portal  

The GeoSpring Hybrid Water Heater creates the same amount of hot water as a traditional electric ... Hydrogen and Fuel Cell; Hydropower, Wave and ...

39

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

40

Absorption Heat Pump Water Heater  

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

Absorption Heat Pump Water Heater Absorption Heat Pump Water Heater Kyle Gluesenkamp Building Equipment Group, ETSD gluesenkampk@ornl.gov 865-241-2952 April 3, 2013 CRADA - GE Development of High Performance Residential Gas Water Heater Image courtesy John Wilkes 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Absorption technology could greatly boost water heater efficiency, but faces barriers of high first cost and working fluid challenges. Impact of Project: Energy factor of gas storage water

Note: This page contains sample records for the topic "hot water heater" 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

Absorption Heat Pump Water Heater  

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

Absorption Heat Pump Water Heater Absorption Heat Pump Water Heater Kyle Gluesenkamp Building Equipment Group, ETSD gluesenkampk@ornl.gov 865-241-2952 April 3, 2013 CRADA - GE Development of High Performance Residential Gas Water Heater Image courtesy John Wilkes 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Absorption technology could greatly boost water heater efficiency, but faces barriers of high first cost and working fluid challenges. Impact of Project: Energy factor of gas storage water

42

Heat Pump Water Heaters and American Homes: A Good Fit?  

E-Print Network (OSTI)

heater analysis model (WHAM) and a hot water draw model,heaters is calculated using WHAM, which accounts for a rangeTo account for this factor, WHAM is expanded to include the

Franco, Victor

2011-01-01T23:59:59.000Z

43

Tankless Coil and Indirect Water Heater Basics | Department of Energy  

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

Coil and Indirect Water Heater Basics Coil and Indirect Water Heater Basics Tankless Coil and Indirect Water Heater Basics August 19, 2013 - 3:03pm Addthis Illustration of a tankless coil water heater. The heater is box-shaped, and has two pipes sticking out one end: one a cold water inlet, and one a hot water outlet. These pipes lead into the heater to a cylindrical coil called a heat exchanger. Long tubes surrounding the heat exchanger are labeled the heated water jacket. At the bottom of the box is a row of small flames, called the boiler heat source. Tankless coil and indirect water heaters use a home or building's space heating system to heat water as part of an integrated or combination water and space heating system. How Tankless Coil and Indirect Water Heaters Work A tankless coil water heater uses a heating coil or heat exchanger

44

Solar water heater lease program. Interim report  

SciTech Connect

The Solar Water Heater Lease Program consists of the installation and leasing of ten solar systems to central Illinois homeowners. The measured energy savings to the homeowners and the impact of such systems on energy production requirements are studied. Each homeowner collects data on the gallons of hot water used, electricity used to heat water, and the temperatures of the cold and hot water outlet temperatures at the sink. The data are presented and conclusions are drawn, including the optimum slope of the collector, comparison of the actual hot water consumption and the estimated consumption, evaluation of the effects of temperature settings of the non-solar water heater, and the percentage of the energy provided for hot water by the solar system. The monitoring procedures and results are evaluated. Recommendations for improving the solar hot water systems are presented. (LEW)

1982-01-01T23:59:59.000Z

45

$69 solar water heater  

SciTech Connect

The construction of a batch or breadbox solar water heater is described in which it is assumed that an old refrigerator and used galvanized air compressor tank are available (at no charge). Additional materials required (plumbing, hardware, lumber, and miscellaneous) cost approximately $69. The refrigerator serves as an insulated box as well as a built-in hinged adjustable reflector (the door). The door also provides tight-fitting nighttime insulation. Detailed directions are provided for the construction of the solar water heater; the principal operations involve modification of the refrigerator, plumbing the tank, constructing the glazing section, and tilting the collector properly. Ample illustrations are provided and a complete list of materials needed is included. The project can be completed in one day. (MJJ)

Morris, E.

1980-09-01T23:59:59.000Z

46

Tankless Demand Water Heater Basics | Department of Energy  

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

Demand Water Heater Basics Demand Water Heater Basics Tankless Demand Water Heater Basics August 19, 2013 - 2:57pm Addthis Illustration of an electric demand water heater. At the top of the image, the heating unit is shown. Cold water flows in one end of a pipe, flows through and around several curved pipes over the heating elements, and out the other end as hot water. Beneath the heating unit, a typical sink setup is shown. The sink has two pipes coming out the bottom, one for the hot water line and one for the cold water line. Both pipes lead to the heating unit, which is installed in close proximity to the area of hot water use, and is connected to a power source (110 or 220 volts). Demand (tankless or instantaneous) water heaters have heating devices that are activated by the flow of water, so they provide hot water only as

47

Tankless Demand Water Heater Basics | Department of Energy  

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

Tankless Demand Water Heater Basics Tankless Demand Water Heater Basics Tankless Demand Water Heater Basics August 19, 2013 - 2:57pm Addthis Illustration of an electric demand water heater. At the top of the image, the heating unit is shown. Cold water flows in one end of a pipe, flows through and around several curved pipes over the heating elements, and out the other end as hot water. Beneath the heating unit, a typical sink setup is shown. The sink has two pipes coming out the bottom, one for the hot water line and one for the cold water line. Both pipes lead to the heating unit, which is installed in close proximity to the area of hot water use, and is connected to a power source (110 or 220 volts). Demand (tankless or instantaneous) water heaters have heating devices that are activated by the flow of water, so they provide hot water only as

48

Water heater control module  

DOE Patents (OSTI)

An advanced electric water heater control system that interfaces with a high temperature cut-off thermostat and an upper regulating thermostat. The system includes a control module that is electrically connected to the high-temperature cut-off thermostat and the upper regulating thermostat. The control module includes a switch to open or close the high-temperature cut-off thermostat and the upper regulating thermostat. The control module further includes circuitry configured to control said switch in response to a signal selected from the group of an autonomous signal, a communicated signal, and combinations thereof.

Hammerstrom, Donald J

2013-11-26T23:59:59.000Z

49

Insulation refit kit for domestic water heaters  

SciTech Connect

The development, testing, and marketing of an insulation kit which homeowners could apply to gas or electric hot water heaters in order to conserve energy in water heating are described. The kit, being marketed at $20, should save 450 kWh or 3600 ft/sup 3/ of gas per year. (LCL)

1977-03-23T23:59:59.000Z

50

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

51

THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

The Performance of Solar Water Heater With Natural Ci rculperformance of solar thermos i phon water heaters with heatSolar Jubilee, Phoenix, AZ, June 2-6, 1980 THERMOSIPHON WATER HEATERS

Mertol, Atila

2012-01-01T23:59:59.000Z

52

Solar Water Heater Basics | Department of Energy  

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

Solar Water Heater Basics Solar Water Heater Basics August 19, 2013 - 3:01pm Addthis Illustration of an active, closed loop solar water heater. A large, flat panel called a flat...

53

Do You Have a Solar Water Heater?  

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

Earlier this week, Ernie wrote about the economics of getting a solar water heater. As Ernie explained, a solar water heater is more expensive than a normal water heater, but depending on your area...

54

Conventional Storage Water Heaters | Department of Energy  

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

Conventional Storage Water Heaters Conventional Storage Water Heaters July 30, 2013 - 3:39pm Addthis Illustration showing the components of a storage water heater. On top of the...

55

Heat Pump Water Heaters | Department of Energy  

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

Water Heaters Heat Pump Water Heaters August 19, 2013 - 2:59pm Addthis Illustration of a heat pump water heater, which looks like a tall cylinder with a small chamber on top and a...

56

Solar Water Heaters | Department of Energy  

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

Solar Water Heaters Solar Water Heaters August 19, 2013 - 3:01pm Addthis Illustration of an active, closed loop solar water heater. A large, flat panel called a flat plate...

57

Tankless Demand Water Heaters | Department of Energy  

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

Demand Water Heaters Tankless Demand Water Heaters August 19, 2013 - 2:57pm Addthis Illustration of an electric demand water heater. At the top of the image, the heating unit is...

58

Grid Friendly™ Water Heater Controller - Available ...  

Summary. The Grid Friendly™ Water Heater Controller is a device that provides smart grid services from existing, installed electric water heaters.

59

Energy conservation for household refrigerators and water heaters  

Science Conference Proceedings (OSTI)

An energy conservation arrangement for household refrigerators and water heaters, in which the source of cold water to the hot water heater is divided and part is caused to flow through and be warmed in the condenser of the refrigerator. The warmed water is then further heated in the oil cooling loop of the refrigerator compressor, and proceeds then to the top of the hot water tank.

Speicher, T. L.

1984-12-11T23:59:59.000Z

60

Combined Systems with Tankless Water Heaters  

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

Combined Systems with Tankless Water Heaters Combined Systems with Tankless Water Heaters Armin Rudd Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas 2 Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas More builder's wanting to use gas-fired tankless water heaters, and with solar pre-heat  Endless hot water  Helps HERS Index  Space saving 2 3 Residential Energy Efficiency Stakeholder Meeting 2/29 - 3/2/2012 Austin, Texas Problem with elevated TWH inlet temperature 60 70 80 90 100 110 120 130 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Maximum Inlet Temperature (F) DHW flow rate (gpm) Maximum TWH inlet temperature to stay below 125 F delivered temperature, with 15 kBtu/h minimum firing rate Typical shower temperature 4 Residential Energy Efficiency Stakeholder Meeting

Note: This page contains sample records for the topic "hot water heater" 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

Savings Project: Insulate Your Water Heater Tank | Department...  

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

Your Water Heater Tank Addthis Project Level medium Energy Savings 20-45 annually Time to Complete 1.5 hours Overall Cost 30 Insulate your hot water tank to save energy and...

62

Performance and economic evaluation of the seahorse natural gas hot water heater conversion at Fort Stewart. Final report  

SciTech Connect

The Federal government is the largest single energy consumer in the United States with consumption of nearly 1.5 quads/year of energy (10{sup 15} quad = 1015 Btu) and 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 report provides the results of a field evaluation that PNL conducted for DOE/FEMP with funding support from the US Department of Defense (DoD) Strategic Environmental Research and Development Program (SERDP) to examine the performance of 4 candidate energy-saving technology-a water heater conversion system to convert electrically powered water heaters 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.

1995-12-01T23:59:59.000Z

63

Energy Basics: Conventional Storage Water Heaters  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

heater can range from 20 to hundreds of gallons. Conventional storage water heater fuel sources include natural gas, propane, fuel oil, and electricity. Natural gas and...

64

Performance Testing Residential Heat Pump Water Heaters under South- and Central-Florida Climate Conditions: Hot, Humid Climate and Warm Ground Water Pose Unusual Operating Environment for Heat Pump Water Heaters  

Science Conference Proceedings (OSTI)

Heat pump water heaters (HPWHs) are known to provide considerable energy savings compared with electric resistance devices in many applications. However, as their performance is climate-dependent, it is important to understand their operation in extreme climates. Southern and Central Florida presents an extreme climate for HPWHs, as the air temperature, humidity, and entering water temperatures are all high nearly year-round. This report examines HPWH performance in the Florida Power & Light ...

2013-09-30T23:59:59.000Z

65

Heat Pump Water Heaters | Department of Energy  

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

Water Heaters Water Heaters Heat Pump Water Heaters May 4, 2012 - 5:21pm Addthis A diagram of a heat pump water heater. A diagram of a heat pump water heater. What does this mean for me? Heat pump water heaters can be two to three times more energy efficient than conventional electric storage water heaters. Heat pump water heaters work in locations that remain in the 40º-90ºF range year-round. Most homeowners who have heat pumps use them to heat and cool their homes. But a heat pump also can be used to heat water -- either as stand-alone water heating system, or as combination water heating and space conditioning system. How They Work Heat pump water heaters use electricity to move heat from one place to another instead of generating heat directly. Therefore, they can be two to

66

Savings Project: Insulate Your Water Heater Tank | Department of Energy  

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

Savings Project: Insulate Your Water Heater Tank Savings Project: Insulate Your Water Heater Tank Savings Project: Insulate Your Water Heater Tank Addthis Project Level medium Energy Savings $20-$45 annually Time to Complete 1.5 hours Overall Cost $30 Insulate your hot water tank to save energy and money. | Photo courtesy of iStockphoto.com/glennebo Insulate your hot water tank to save energy and money. | Photo courtesy of iStockphoto.com/glennebo Just like insulating your walls or roof, insulating your hot water tank is an easy and inexpensive way to improve energy efficiency and save you money each month. If your water tank is new, it is likely already insulated. If you have an older hot water tank, check to see if it has insulation with an R-value of at least 24. If not, consider insulating your water tank, which

67

Performance of a Heat Pump Water Heater in the Hot-Humid Climate, Windermere, Florida (Fact Sheet), Building America Case Study: Technology Solutions for New and Existing Homes, Building Technologies Office (BTO)  

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

Performance of a Performance of a Heat Pump Water Heater in the Hot-Humid Climate Windermere, Florida Over recent years, heat pump water heaters (HPWHs) have become more read- ily available and more widely adopted in the marketplace. A key feature of an HPWH unit is that it is a hybrid system. When conditions are favorable, the unit will operate in heat pump mode (using a vapor compression system that extracts heat from the surrounding air) to efficiently provide domestic hot water (DHW). Homeowners need not adjust their behavior to conform to the heat pump's capabilities. If a heat pump cannot meet a higher water draw demand, the heater will switch to electric resistance to provide a higher heating rate. This flexibility

68

Conventional Storage Water Heater Basics | Department of Energy  

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

Conventional Storage Water Heater Basics Conventional Storage Water Heater Basics July 30, 2013 - 3:39pm Addthis Illustration showing the components of a storage water heater. On...

69

Heat Pump Water Heaters and American Homes: A Good Fit?  

E-Print Network (OSTI)

2001. Residential Heat Pump Water Heater (HPWH) DevelopmentKelso, J. 2003. Incorporating Water Heater Replacement into2005. Residential Heat Pump Water Heaters: Energy Efficiency

Franco, Victor

2011-01-01T23:59:59.000Z

70

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

market research on solar water heaters. National Renew- ablecom- bined space/water heaters, solar water heaters,combined solar space/water heater, electric water heaters

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

71

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

72

Storage Water Heaters | Department of Energy  

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

Storage Water Heaters Storage Water Heaters Storage Water Heaters June 15, 2012 - 6:00pm Addthis Consider energy efficiency when selecting a conventional storage water heater to avoid paying more over its lifetime. | Photo courtesy of ©iStockphoto/JulNichols. Consider energy efficiency when selecting a conventional storage water heater to avoid paying more over its lifetime. | Photo courtesy of ©iStockphoto/JulNichols. Conventional storage water heaters remain the most popular type of water heating system for the home. Here you'll find basic information about how storage water heaters work; what criteria to use when selecting the right model; and some installation, maintenance, and safety tips. How They Work A single-family storage water heater offers a ready reservoir -- from 20 to

73

Energy Basics: Tankless Demand Water Heaters  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

only as needed and without the use of a storage tank. They don't produce the standby energy losses associated with storage water heaters. How Demand Water Heaters Work Demand...

74

Solar Water Heaters and the Economy | Department of Energy  

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

Solar Water Heaters and the Economy Solar Water Heaters and the Economy Solar Water Heaters and the Economy July 11, 2012 - 11:59am Addthis Ernie Tucker Editor, National Renewable Energy Laboratory These are the days of hot sun and mortgage refinance frenzy. Somehow, they've both combined in my mind to make me ponder the economics of a solar water heater. Because the sun's been beating down on our garden hose, the initial flush of water can be very hot. The warm spray reminded me of the times on camping trips when we'd bring along a portable solar shower -- essentially a black plastic bag with a tube and shower nozzle -- for bathing. While not an endless supply (perhaps 10 gallons), it was a very enjoyable luxury. Of course, it assumes that there's plenty of sunshine, but if so -- voila -- a

75

Solar Water Heaters and the Economy | Department of Energy  

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

Water Heaters and the Economy Water Heaters and the Economy Solar Water Heaters and the Economy July 11, 2012 - 11:59am Addthis Ernie Tucker Editor, National Renewable Energy Laboratory These are the days of hot sun and mortgage refinance frenzy. Somehow, they've both combined in my mind to make me ponder the economics of a solar water heater. Because the sun's been beating down on our garden hose, the initial flush of water can be very hot. The warm spray reminded me of the times on camping trips when we'd bring along a portable solar shower -- essentially a black plastic bag with a tube and shower nozzle -- for bathing. While not an endless supply (perhaps 10 gallons), it was a very enjoyable luxury. Of course, it assumes that there's plenty of sunshine, but if so -- voila -- a warm and sudsy campsite clean-up is possible.

76

FS: heat pump water heaters | The Better Buildings Alliance  

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

Food Service » Install a heat pump Food Service » Install a heat pump water heaterand reduce water heating energy up to 70% using the commercial heat pump water heater specificat Activities Technology Solutions Teams Lighting & Electrical Space Conditioning Plug & Process Loads Food Service Refrigeration Laboratories Energy Management & Information Systems Public Sector Teams Market Solutions Teams Install a heat pump water heaterand reduce water heating energy up to 70% using the commercial heat pump water heater specification The Food Service team developed a Commercial Heat Pump Water Heater Specification that can be used to reduce water heating energy by 70%. An older, electric resistance water heater (operated in a building with a hot water demand of 500 gallons a day) can cost more than $3,500 each year

77

Tankless or Demand-Type Water Heaters | Department of Energy  

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

or Demand-Type Water Heaters May 2, 2012 - 6:47pm Addthis Diagram of a tankless water heater. Diagram of a tankless water heater. How does it work? Tankless water heaters deliver...

78

Selecting a New Water Heater | Department of Energy  

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

Selecting a New Water Heater Selecting a New Water Heater August 29, 2012 - 7:30pm Addthis Water heater testing facility at Oak Ridge National Laboratory. Water heater testing...

79

Tankless Coil and Indirect Water Heaters | Department of Energy  

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

Tankless Coil and Indirect Water Heaters Tankless Coil and Indirect Water Heaters August 19, 2013 - 3:03pm Addthis Illustration of a tankless coil water heater. The heater is...

80

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

Note: This page contains sample records for the topic "hot water heater" 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

Energy Saving Absorption Heat Pump Water Heater  

energy savings and can reduce the use of fossil fuels by buildings. While conventional heat pump water heater designs are limited to using toxic ammonia water ...

82

Grays Harbor PUD - Solar Water Heater Loan | Department of Energy  

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

Solar Water Heater Loan Solar Water Heater Loan Grays Harbor PUD - Solar Water Heater Loan < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate not specified Program Info State District of Columbia Program Type Utility Loan Program Rebate Amount not specified Provider Grays Harbor PUD Since October 2001, Grays Harbor PUD has offered a low-interest loan program (currently 4.0%) for the installation of solar water heaters. Loans are available for the installation of solar collectors of 40 square feet or more. The loans are provided through local lenders, with interest subsidized by the PUD. Only customers who currently use electricity for hot water are eligible. Pre-approval is required for this loan and loan amounts are determined on a case-by-case basis.

83

Grays Harbor PUD - Solar Water Heater Rebate | Department of Energy  

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

Grays Harbor PUD - Solar Water Heater Rebate Grays Harbor PUD - Solar Water Heater Rebate Grays Harbor PUD - Solar Water Heater Rebate < Back Eligibility Commercial Industrial Residential Savings Category Heating & Cooling Solar Water Heating Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount $600 Provider Grays Harbor PUD Since October 2001, Grays Harbor PUD has offered a rebate program for the installation of solar water heaters. Rebates of $600 are available for the installation of solar collectors of 40 square feet or more. Only customers who currently use electricity for hot water are eligible. This rebate is available on a case-by-case basis, so you must contact the utility in order to take advantage of it. Customers may choose a [http://dsireusa.org/incentives/incentive.cfm?Incentive_Code=WA09F&re=1&ee=1

84

Water heater with an improved thermostat mounting and a method of making such water heaters  

Science Conference Proceedings (OSTI)

An improvement in an electric water heater is described comprising: a non-metallic tank, a cold water inlet, a hot water outlet, an electrical heating means adapted to heat a body of water contained in the tank and a thermostat having a sensing face with a given area controlling the flow of electric current to the heating means, the improvement comprising a thermally conductive thermostat mounting plate having a surface area substantially larger than the sensing face given area in direct contact with the tank and a thermostat retention means releasably holding the thermostat in contact with the thermostat mounting plate.

Moore, H.J.; Deneau, M.E.

1993-06-15T23:59:59.000Z

85

Heat Pump Water Heaters and American Homes: A Good Fit?  

SciTech Connect

Heat pump water heaters (HPWHs) are over twice as energy-efficient as conventional electric resistance water heaters, with the potential to save substantial amounts of electricity. Drawing on analysis conducted for the U.S. Department of Energy's recently-concluded rulemaking on amended standards for water heaters, this paper evaluates key issues that will determine how well, and to what extent, this technology will fit in American homes. The key issues include: 1) equipment cost of HPWHs; 2) cooling of the indoor environment by HPWHs; 3) size and air flow requirements of HPWHs; 4) performance of HPWH under different climate conditions and varying hot water use patterns; and 5) operating cost savings under different electricity prices and hot water use. The paper presents the results of a life-cycle cost analysis of the adoption of HPWHs in a representative sample of American homes, as well as national impact analysis for different market share scenarios. Assuming equipment costs that would result from high production volume, the results show that HPWHs can be cost effective in all regions for most single family homes, especially when the water heater is not installed in a conditioned space. HPWHs are not cost effective for most manufactured home and multi-family installations, due to lower average hot water use and the water heater in the majority of cases being installed in conditioned space, where cooling of the indoor environment and size and air flow requirements of HPWHs increase installation costs.

Franco, Victor; Lekov, Alex; Meyers, Steve; Letschert, Virginie

2010-05-14T23:59:59.000Z

86

Economics of residential gas furnaces and water heaters in United States new construction market  

E-Print Network (OSTI)

market research on solar water heaters. National Renewabletankless combined space/water heaterds, solar water heaters,combined solar space/water heater, electric water heaters

Lekov, Alex B.

2010-01-01T23:59:59.000Z

87

Condensing Hybrid Water Heater Monitoring Field Evaluation  

Science Conference Proceedings (OSTI)

This paper summarizes the Mascot home, an abandoned property that was extensively renovated. Several efficiency upgrades were integrated into this home, of particular interest, a unique water heater (a Navien CR240-A). Field monitoring was performed to determine the in-use efficiency of the hybrid condensing water heater. The results were compared to the unit's rated efficiency. This unit is Energy Star qualified and one of the most efficient gas water heaters currently available on the market.

Maguire, J.; Earle, L.; Booten, C.; Hancock, C. E.

2011-10-01T23:59:59.000Z

88

National solar water heater workshop  

Science Conference Proceedings (OSTI)

The National Solar Water Heater Workshop (NSWHW) program directly resolves the major problem inhibiting the widespread application of solar energy for domestic water heating - that of bridging the gap, by an educational program, between well-known solar technology and the application of that technology. This is accomplished by workshop sponsors throughout the nation, conducting workshops to educate homeowners on solar principles, and installation, operation, and maintenance of their solar system. During a workshop, students personally fabricate two or more collectors and complete a plumbing subsystem, all of which have been developed and specified by Arizona State University (ASU). The program appeals to do-it-yourselfers and handyman type persons who by their example become strong solar advocates to their neighbors and acquaintances. A market for the commercial solar industry is thus also generated as other homeowners acquire installed systems from the local solar industry. A central thrust of this program is the establishment of local solar hardware suppliers who can supply the demand of the students for solar hardware kits. This is a DOE program approved for 2 years and is funded at $600,000 for the first year with $400,000 to be funded for the second year. At the end of 2 years, it is envisioned that 50,000 domestic solar water heaters will have been installed throughout the nation and trust territories which will result in savings in the order of 131 million kWh, 447 billion Btu and 8 million dollars.

Mumma, S.A.; Ashland, M.

1981-01-01T23:59:59.000Z

89

Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters  

SciTech Connect

This report discusses how a significant opportunity for energy savings is domestic hot water heating, where an emerging technology has recently arrived in the U.S. market: the residential integrated heat pump water heater. A laboratory evaluation is presented of the five integrated HPWHs available in the U.S. today.

Sparn, B.; Hudon, K.; Christensen, D.

2011-09-01T23:59:59.000Z

90

Storage Water Heaters | Department of Energy  

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

6:00pm Addthis Consider energy efficiency when selecting a conventional storage water heater to avoid paying more over its lifetime. | Photo courtesy of iStockphoto...

91

The LBNL Water Heater Retail Price Database  

SciTech Connect

Lawrence Berkeley National Laboratory developed the LBNL Water Heater Price Database to compile and organize information used in the revision of U.S. energy efficiency standards for water heaters. The Database contains all major components that contribute to the consumer cost of water heaters, including basic retail prices, sales taxes, installation costs, and any associated fees. In addition, the Database provides manufacturing data on the features and design characteristics of more than 1100 different water heater models. Data contained in the Database was collected over a two-year period from 1997 to 1999.

Lekov, Alex; Glover, Julie; Lutz, Jim

2000-10-01T23:59:59.000Z

92

Field Monitoring Protocol: Heat Pump Water Heaters  

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

Field Monitoring Protocol: Heat Pump Water Heaters B. Sparn, L. Earle, D. Christensen, J. Maguire, and E. Wilson National Renewable Energy Laboratory C.E. Hancock Mountain Energy...

93

DOE_Water_Heater_Meeting_111612.pdf  

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

the request for information "... Energy Conservation Standards for Residential Water Heaters", the comments filed therein, and follow-up items from a previous meeting on...

94

Heat Pump Water Heaters—Laboratory Tests  

Science Conference Proceedings (OSTI)

EPRI conducted laboratory tests of several heat pump water heaters to assess their performance and energy efficiency. Among U.S. heat pump water heaters tested were new products from A. O. Smith, General Electric (GE), and Rheem. These units are designed to be integral, drop-in replacements for standard electric water heaters. Additionally, EPRI tested the Japanese-based Eco-cute heat pump water heater from Daikin, which is a split unit with an outdoor heat pump using CO2 as the refrigerant and an indoor...

2009-12-11T23:59:59.000Z

95

Innovative heat exchangers for solar water heaters.  

E-Print Network (OSTI)

??The performance of two innovative collector-loop heat exchangers used in pumped circulation solar water heaters was investigated experimentally and numerically, and TRNSYS simulation models were… (more)

Soo Too, Yen Chean

2007-01-01T23:59:59.000Z

96

Salem Electric - Solar Water Heater Rebate | Department of Energy  

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

Solar Water Heater Rebate Salem Electric - Solar Water Heater Rebate Eligibility Residential Savings For Heating & Cooling Solar Water Heating Program Information Oregon Program...

97

TVA Partner Utilities - Energy Right Water Heater Program | Department...  

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

Water Heater Program Eligibility InstallerContractor Residential Utility Savings For Appliances & Electronics Water Heating Maximum Rebate Member utility water heater rebate...

98

SMUD - Solar Water Heater Rebate Program | Department of Energy  

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

Solar Water Heater Rebate Program Solar Water Heater Rebate Program SMUD - Solar Water Heater Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Program Info State California Program Type Utility Rebate Program Rebate Amount 500 - 1,500 per system, depending on energy savings Provider Sacramento Municipal Utility District The Sacramento Municipal Utility District's (SMUD) Solar Domestic Hot Water Program provides rebates and/or loan financing to customers who install solar water heating systems. The amount of the rebate depends on how much electricity the system will offset annually: * 800 - 1,399 kWh: $500 * 1,400 - 2,199 kWh: $1,000 * 2,200 kWh or greater: $1,500 . All solar water-heating units must meet standards set by the Solar Rating

99

Tankless Coil and Indirect Water Heaters  

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

Tankless coil and indirect water heaters use a home or building's space heating system to heat water as part of an integrated or combination water and space heating system.

100

Heat Pump Water Heater Performance in  

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

searc searc e er tra A Research Institute of the University of Central Florida FLORIDA SOLAR ENERGY CENTER - A Re h Institut of the Univ sity of Cen l Florida searc e er tra Heat Pump Water Heater Performance in Laboratory House Building America Technical Update 2013 ACI National Home Performance Conference April 29- 30 , 2013 Carlos J. Colon carlos@fsec.ucf.edu A Research Institute of the University of Central Florida FLORIDA SOLAR ENERGY CENTER - A Re h Institut of the Univ sity of Cen l Florida FLORIDA SOLAR ENERGY CENTER - A Research Institute of the University of Central Florida Hot Water Systems (HWS) Laboratory FSEC Grounds, Florida (east coast) 2009 -Present (Currently fourth testing rotation) FLORIDA SOLAR ENERGY CENTER - A Research Institute of the University of Central Florida

Note: This page contains sample records for the topic "hot water heater" 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

Economics of Condensing Gas Furnaces and Water Heaters Potential in Residential Single Family Homes  

E-Print Network (OSTI)

market research on solar water heaters. National Renewablespace heaters, and solar water heaters, as well as other

Lekov, Alex

2011-01-01T23:59:59.000Z

102

Burbank Water and Power - Solar Water Heater Rebate Program (California) |  

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

Burbank Water and Power - Solar Water Heater Rebate Program Burbank Water and Power - Solar Water Heater Rebate Program (California) Burbank Water and Power - Solar Water Heater Rebate Program (California) < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Program Info State California Program Type Utility Rebate Program Rebate Amount $1,500 Provider Rebates Burbank Water and Power is providing incentives for the purchase of solar water heaters. Incentives are only available to residential customers with electric water heaters. There is a limit of one solar water heater per year per property. Applicants must provide access to their residence for a pre-inspection to verify the existing use of an electric water heater. Customers must comply with all code and permit requirements. More

103

Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater...  

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

Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Rebate Program Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Rebate Program < Back Eligibility...

104

HVAC Water Heater Field Tests Research Project | Department of...  

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

HVAC Water Heater Field Tests Research Project HVAC Water Heater Field Tests Research Project The U.S. Department of Energy is currently conducting research into heating,...

105

Ex Parte Memorandum on Grid-Enabled Water Heaters | Department...  

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

met with DOE representatives regarding water heater standards and thermal storage and demand response programs. DOE exparte memo100213 Grid-EnabledWaterHeaterAmendment...

106

Payback Analysis of Design Options for Residential Water Heaters  

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

Payback Analysis of Design Options for Residential Water Heaters Title Payback Analysis of Design Options for Residential Water Heaters Publication Type Report LBNL Report Number...

107

Solar Water Heater Roadmap Leads Path to Market Expansion (Fact...  

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

Innovative strategy to reduce installed cost of solar water heater systems can rival conventional natural gas water heaters in the marketplace. Researchers in the Residential...

108

Tankless Water Heaters: Do They Really Work?  

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

Tankless Water Heaters: Do They Tankless Water Heaters: Do They Really Work? Center for Energy and Environment, NorthernSTAR, Ben Schoenbauer Context * Domestic Water Heating is the next big residential energy in efficiency. - Space heating loads are being reduced - Largest peak load in almost all homes is water heating - Annual water heating load is larger than annual space heating load in many homes - Most DHW equipment is inefficiency 50-60% Technical Approach * TWHs and condensing TWHs have significant energy savings potential - Do these ratings relate to real world performance? - How do TWHs compare to standard water heaters? - What performance/install issues do they have? * 10 home 26 water heater alternating mode field study was conducted Recommended Guidance * In situations where economics are

109

Assessing the Energy Savings of Tankless Water Heater Retrofits in Public Housing  

Science Conference Proceedings (OSTI)

This report describes the methodology, analysis, and findings from a case study of a 110 unit retrofit of gas tankless water heaters in a hot/humid climate in Alachua County, Florida. The housing units had their gas-fired tank type water heaters replaced with gas-fired tankless water heaters as part of a federal program that targeted reduced energy use in public housing.

Ries, R.; Walters, R.; Dwiantoro, D.

2013-01-01T23:59:59.000Z

110

Heat Pump Water Heater Basics | Department of Energy  

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

Water Heater Basics Water Heater Basics Heat Pump Water Heater Basics August 19, 2013 - 2:59pm Addthis Illustration of a heat pump water heater, which looks like a tall cylinder with a small chamber on top and a larger one on the bottom. In the top chamber are a fan, a cylindrical compressor, and an evaporator that runs along the inside of the chamber. Jutting out from the exterior of the bottom chamber is a temperature and pressure relief valve. This valve has a tube called a hot water outlet attached to the top. Below the valve is the upper thermostat, a small square outside the cylinder that is attached to a curved tube inside the heater. Resistance elements run from the upper thermostat to the similarly shaped lower thermostat. Below the lower thermostat is a drain valve with a cold water inlet attached to the top. Inside the cylinder is an anode, a series of thin tubes running through the bottom chamber to a coiled tube called a condenser. Insulation runs along the inside of the cylinder.

111

Heat Pump Water Heaters Demonstration Project  

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

Heat Pump Water Heaters Heat Pump Water Heaters Demonstration Project Building America Stakeholder Meeting Ron Domitrovic Ammi Amarnath 3/1/2012 Austin, TX 2 © 2011 Electric Power Research Institute, Inc. All rights reserved. HPWH Field Demonstration: Research Objectives * Assess heat pump water heater technology by measuring efficiency. * Provide credible data on the performance and reliability of heat pump water heaters. * Assess user satisfaction in a residential setting. 3 © 2011 Electric Power Research Institute, Inc. All rights reserved. Demonstration Host Utilities Target: 40 Units per Utility Installed and Potential Sites by Climate Zone Source: Department of Energy (DOE), Building America climate regions 4 © 2011 Electric Power Research Institute, Inc. All rights reserved. Installation Locations-Southern Company Region

112

Strategy Guideline: Proper Water Heater Selection  

Science Conference Proceedings (OSTI)

This strategy guideline provides step-by-step procedures for evaluating preferred cost-effective options for energy efficient water heater alternatives based on local utility rates, climate, and anticipated loads. These procedures, developed both for individual water heater applications (both single and multi-family) and multifamily central systems, provide users with projections on operating cost savings over a 10-year time horizon for retrofit applications and on a cash flow basis for new construction.

Hoeschele, M.; Springer, D.; German, A.; Staller, J.; Zhang, Y.

2012-08-01T23:59:59.000Z

113

Heat Pump Water Heaters for Commercial Buildings  

Science Conference Proceedings (OSTI)

This technical update from the Electric Power Research Institute (EPRI) reviews the technology of heat pump water heaters (HPWHs) for commercial building applications. The report discusses the technical and conceptual background of heat pump water heaters, laboratory testing as performed at EPRI's laboratory, and implications of the test results. It provides analysis of the climactic applicability, financial scenarios, the air-cooling benefit or detriment of HPWH technology.

2011-12-22T23:59:59.000Z

114

Economic Analysis of Solar Water Heaters in GuangZhou  

E-Print Network (OSTI)

As a mature applied technology, the largest obstacle to the promotion of the solar water heater is the high initial investment that makes an impact on consumers' choices. The initial investment and maintenance cost of the solar water heater,gas water heater and electrical water heater in Guangzhou was compared and the Annual Cost Calculation Method (ACCM)was introduced to explain the remarkable economic benefits. The social benefits of the solar water heater were introduced from a scientific view.

Wang, Y.; Zhao, L.

2006-01-01T23:59:59.000Z

115

Solar Water Heater Rebate | Department of Energy  

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

Solar Water Heater Rebate Solar Water Heater Rebate Solar Water Heater Rebate < Back Eligibility Commercial Fed. Government Residential Savings Category Heating & Cooling Solar Water Heating Program Info State Hawaii Program Type State Rebate Program Rebate Amount Residential Solar Water Heating: $1,000 upfront, or Residential Solar Water Heating Interest Loan Buy-Down: $1,000 Residential Solar Attic Fans: $50 Commercial: $250 per 12,000 Btu/hr derated capacity Provider Hawaii Energy Hawaii Energy, a third-party administered public benefits fund, provides incentives for energy efficiency and conservation to customers of the Hawaiian Electric Company (HECO) and its subsidiaries, Maui Electric Company (MECO) and Hawaii Electric Light Company (HELCO). This incentive is available for installations on the islands of Oahu, Hawaii, Maui, Lanai and

116

Conventional Storage Water Heater Basics | Department of Energy  

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

Conventional Storage Water Heater Basics Conventional Storage Water Heater Basics Conventional Storage Water Heater Basics July 30, 2013 - 3:39pm Addthis Illustration showing the components of a storage water heater. On top of the tank are two thin pipes; one pipe is the hot water outlet, and the other is the cold water inlet. A large pipe in the middle is called a vent pipe. A pressure/temperature relief valve is also on top of the tank and is connected to an open pipe that runs down the side of the tank. Another valve near the bottom of the outside of the tank is the thermostat and gas valve. A cutout shows the parts inside the tank, which include a large tube called a flue tube/heat exchanger. Inside this tube is a jagged insert called a flue baffle. Beside the flue tube/heat exchanger is a thin tube called the anode rod. At the bottom of the tank is a gas burner, and beneath the burner are combustion air openings.

117

Heat pump water heaters. Final report  

SciTech Connect

A survey of the eleven manufacturers of heat pump water heaters (HPWHs) in the United States is presented. Product characteristics and application guidelines, including economic comparisons to other means of water heating, are summarized. A survey of forty-five utilities, identified as having conducted field tests of HPWHs, is also presented. Based on the experiences of these utilities, experimental designs, instrumentation schemes, and data reduction methods are recommended. A brief assessment of utility load profile impacts illustrates that HPWHs can provide peak load reductions compared to electric resistance water heaters. Specific recommendations are made for further research and development of HPWHs.

Dobyns, J.E.; Blatt, M.H.

1984-05-01T23:59:59.000Z

118

The influence of a variable volume water heater on the domestic load profile  

SciTech Connect

In this paper a variable volume water heater and a load impact model is presented. The variable volume water heater is a unique system that can be implemented as a residential demand-side management tool. The variable volume water heater can shift the electrical energy consumption, used to heat water, to off-peak time periods. The electrical energy is shifted without influencing the hot water usage of the customer. The load impact model simulates the effect of controlling the volume of stored hot water on a domestic load. The model mathematics as well as the model verification are discussed. The paper ends with a comparative case study on two residential areas. The case study indicates that the variable volume water heater can reduce the system peak as well as increase the off-peak energy consumption.

Lemmer, E.F.; Delport, G.J.

1999-12-01T23:59:59.000Z

119

Building America Top Innovations Hall of Fame Profile … Tankless Gas Water Heater Performance  

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

Incorporating tankless water heaters was one Incorporating tankless water heaters was one of many energy-efficiency recommendations Building America's research team IBACOS had for San Antonio builder Imagine Homes. Although tankless gas water heaters should save approximately 33% on hot water heating compared to a conventional storage water heater, actual energy savings vary significantly based on individual draw volume. Above 10 gallons per draw, the efficiency approaches the rated energy factor. The greatest savings occur at a daily use quantity of about 50 gallons. BUILDING AMERICA TOP INNOVATIONS HALL OF FAME PROFILE INNOVATIONS CATEGORY: 1. Advanced Technologies and Practices 1.2 Energy Efficient Components Tankless Gas Water Heater Performance As improved thermal enclosures dramatically reduce heating and cooling loads,

120

Building Technologies Office: HVAC and Water Heater Field Tests Research  

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

HVAC and Water Heater HVAC and Water Heater Field Tests Research Project to someone by E-mail Share Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Facebook Tweet about Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Twitter Bookmark Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Google Bookmark Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Delicious Rank Building Technologies Office: HVAC and Water Heater Field Tests Research Project on Digg Find More places to share Building Technologies Office: HVAC and Water Heater Field Tests Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research

Note: This page contains sample records for the topic "hot water heater" 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

ENERGY STAR Residential Water Heaters to Save Americans Up to...  

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

ENERGY STAR Residential Water Heaters to Save Americans Up to 823 Million in the Next Five Years ENERGY STAR Residential Water Heaters to Save Americans Up to 823 Million in the...

122

TVA Partner Utilities- Energy Right Water Heater Program  

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

The TVA energy right Water Heater Plan promotes the installation of high efficiency water heaters in homes and small businesses. TVA provides a $50 incentive to local power companies for each...

123

Buildings Energy Data Book: 5.4 Water Heaters  

Buildings Energy Data Book (EERE)

3 Water Heater Manufacturer Market Shares 2006 2008 A.O. SmithState Industries 23% 46% Rheem Manufacturing 37% 37% Bradford-White 14% 13% American Water Heater 14% (1) Others 12%...

124

NREL Evaluates Performance of Heat Pump Water Heaters (Fact Sheet)  

SciTech Connect

NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S. climate zones.

Not Available

2012-02-01T23:59:59.000Z

125

Inexpensive solar water heater you can build. Publication C-188  

SciTech Connect

Directions are given for constructing a home-made solar water heater that is expected to supply over 50% of the hot water for a family of 3 or 4. System cost is estimated at $250.00. The system utilizes three 2 x 8-foot solar panels. Hot water from the panels is pumped through a preheat-storage tank where it heats domestic water. The preheated water is then drawn into the cold water inlet of the regular home water heater. The pump which circulates the fluid is controlled by a differential thermostat which turns it on when the solar panels become hotter than the water in the preheat-storage tank. The collector panel design, construction, assembly, and installation are described in detail, as are the heat exchanger and storage tank. A thermosiphon system design is also briefly outlined. Sources of necessary materials are given as well as a list of needed materials, miscellaneous supplies, and major tools. Finally, the research and experimental work leading to the design is described, including the testing of models. (LEW)

Herndon, L.P.; Hill, G.C.

1982-01-01T23:59:59.000Z

126

Burbank Water and Power - Solar Water Heater Rebate Program ...  

Open Energy Info (EERE)

Burbank Water and Power - Solar Water Heater Rebate Program (California) No revision has been approved for this page. It is currently under review by our subject matter experts. No...

127

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

128

Feasibility of Using Measurements of Internal Components of Tankless Water Heaters for Field Monitoring of Energy and Water Use  

E-Print Network (OSTI)

Products: Test Procedures for Water Heaters; Final Rule,"Testing of Tankless Gas Water Heater Performance," DavisInc. , "T-K2 Instantaneous Water Heater Installation Manual

Lutz, Jim

2008-01-01T23:59:59.000Z

129

AWSWAH - the heat pipe solar water heater  

Science Conference Proceedings (OSTI)

An all weather heat pipe solar water heater (AWSWAH) comprising a collector of 4 m/sup 2/ (43 ft/sup 2/) and a low profile water tank of 160 liters (42 gal.) was developed. A single heat pipe consisting of 30 risers and two manifolds in the evaporator and a spiral condenser was incorporated into the AWSWAH. Condensate metering was done by synthetic fiber wicks. The AWSWAH was tested alongside two conventional solar water heaters of identical dimensions, an open loop system and a closed loop system. It was found that the AWSWAH was an average of 50% more effective than the open system in the temperature range 30-90 /sup 0/C (86-194 /sup 0/F). The closed loop system was the least efficient of the three systems.

Akyurt, M.

1986-01-01T23:59:59.000Z

130

NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S. climate zones.  

E-Print Network (OSTI)

in homes compared to traditional electric resistance water heaters. Researchers at the National Renewable is a function of surrounding air temperature, humidity, hot water usage, and the logic controlling the heat pump

131

TVA Partner Utilities - Energy Right' Water Heater Program | Department of  

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

Right' Water Heater Program Right&#039; Water Heater Program TVA Partner Utilities - Energy Right' Water Heater Program < Back Eligibility Installer/Contractor Residential Utility Savings Category Appliances & Electronics Water Heating Maximum Rebate Member utility water heater rebate programs can range from $25 to total cost. Program Info State Mississippi Program Type Utility Rebate Program Rebate Amount Energy Efficient Water Heater: $50 from TVA Provider Tennessee Valley Authority The TVA energy right Water Heater Plan promotes the installation of high efficiency water heaters in homes and small businesses. TVA provides a $50 incentive to local power companies for each installation. Power Companies may pass these incentives on to customers. Customers should contact their local power company to see what programs are

132

Energy Basics: Solar Water Heaters  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

solar storage in one tank. Types of Solar Collectors Solar collectors gather the sun's energy, transform its radiation into heat, and then transfer that heat to water or solar...

133

Condensing Hybrid Water Heater Monitoring Field Evaluation  

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

Condensing Hybrid Water Heater Condensing Hybrid Water Heater Monitoring Field Evaluation Jeff Maguire, Lieko Earle, and Chuck Booten National Renewable Energy Laboratory C.E. Hancock Mountain Energy Partnership Produced under direction of the Sacramento Municipal Utilities District by the National Renewable Energy Laboratory (NREL) under Interagency Agreement CRD-05-168 and Task No WR49.3000. Technical Report NREL/TP-5500-52234 October 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308

134

An Overview of the New Residential Water Heater Efficiency Standards  

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

An Overview of the New Residential Water Heater Efficiency Standards An Overview of the New Residential Water Heater Efficiency Standards Speaker(s): Alex Lekov Date: April 26, 2010 - 12:00pm Location: 90-3122 DOE issued new standards for residential water heaters last month that will save an estimated 2.6 quads of energy over 30 years. For most product sizes sold, the new standards can be met with modest changes, such as adding more insulation to today's conventional tank-style water heaters. For the most common size electric water heater (50 gallons), the standards will save 4 percent, while for the most common size gas water heater (40 gallons), the new standards will save 3 percent. However, for the biggest products (those with over 55 gallons in storage capacity, which is about 9% and 4% of the electric and gas storage water heater markets, respectively), the new

135

Field Monitoring Protocol: Heat Pump Water Heaters  

SciTech Connect

This document provides a standard field monitoring protocol for evaluating the installed performance of Heat Pump Water Heaters in residential buildings. The report is organized to be consistent with the chronology of field test planning and execution. Research questions are identified first, followed by a discussion of analysis methods, and then the details of measuring the required information are laid out. A field validation of the protocol at a house near the NREL campus is included for reference.

Sparn, B.; Earle, L.; Christensen, D.; Maguire, J.; Wilson, E.; Hancock, E.

2013-02-01T23:59:59.000Z

136

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

137

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,...

138

LOW COST HEAT PUMP WATER HEATER (HPWH)  

Science Conference Proceedings (OSTI)

Water heating accounts for the second largest portion of residential building energy consumption, after space conditioning. Existing HPWH products are a technical success, with demonstrated energy savings of 50% or more compared with standard electric resistance water heaters. However, current HPWHs available on the market cost an average of $1000 or more, which is too expensive for significant market penetration. What is needed is a method to reduce the first cost of HPWHs, so that the payback period will be reduced from 8 years to a period short enough for the market to accept this technology. A second problem with most existing HPWH products is the reliability issue associated with the pump and water loop needed to circulate cool water from the storage tank to the HPWH condenser. Existing integral HPWHs have the condenser wrapped around the water tank and thus avoid the pump and circulation issues but require a relatively complex and expensive manufacturing process. A more straightforward potentially less costly approach to the integral, single package HPWH design is to insert the condenser directly into the storage tank, or immersed direct heat exchanger (IDX). Initial development of an IDX HPWH met technical performance goals, achieving measured efficiencies or energy factors (EF) in excess of 1.79. In comparison conventional electric water heaters (EWH) have EFs of about 0.9. However, the initial approach required a 2.5" hole on top of the tank for insertion of the condenser - much larger than the standard openings typically provided. Interactions with water heater manufacturers indicated that the non standard hole size would likely lead to increased manufacturing costs (at least initially) and largely eliminate any cost advantage of the IDX approach. Recently we have been evaluating an approach to allow use of a standard tank hole size for insertion of the IDX condenser. Laboratory tests of a prototype have yielded an EF of 2.02.

Mei, Vince C [ORNL; Baxter, Van D [ORNL

2006-01-01T23:59:59.000Z

139

Selecting a New Water Heater You have a lot to consider when selecting a  

E-Print Network (OSTI)

the water heater's annual operation costs but also its size and energy efficiency. Natural gas, oil if they offer off- peak electricity rates. If available, heating your water during off-peak hours will save you use. Estimating your peak hot water usage will help you identify an appropriate tank for your

140

Water Heaters and Hot Water Distribution Systems  

E-Print Network (OSTI)

distribution system, ground-source heat pump and ground heatdistribution systems, ground-source heat pumps and ground

Lutz, Jim

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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

Water Heaters and Hot Water Distribution Systems  

E-Print Network (OSTI)

the elimination of the standby losses common to gas storageflow rates. Eliminating the standby heat loss results in ais used to account for standby losses. Although storage

Lutz, Jim

2012-01-01T23:59:59.000Z

142

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

143

Measure Guideline: Transitioning to a Tankless Water Heater  

Science Conference Proceedings (OSTI)

This Measure Guideline provides information to help residential builders and retrofitters with the design, specification, selection, implementation, installation, and maintenance issues of transitioning from tank-type water heaters to tankless water heaters. The report compares the differences between tankless and tank-type water heaters, highlighting the energy savings that can be realized by adopting tankless water heaters over tank-type water heaters. Selection criteria and risks discussed include unit sizing and location, water distribution system, plumbing line length and diameter, water quality, electrical backup, and code issues. Cost and performance data are provided for various types of tankless and tank-type water heaters, both natural gas fired and electric. Also considered are interactions between the tankless water heater and other functional elements of a house, such as cold water supply and low-flow devices. Operating costs and energy use of water distribution systems for single- and two-story houses are provided, along with discussion of the various types of distribution systems that can be used with tankless water heaters. Finally, details to prepare for proper installation of a tankless water heater are described.

Brozyna, K.; Rapport, A.

2012-09-01T23:59:59.000Z

144

Linn County Rural Electric Cooperative - Solar Water Heater Rebate Program  

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

Linn County Rural Electric Cooperative - Solar Water Heater Rebate Linn County Rural Electric Cooperative - Solar Water Heater Rebate Program Linn County Rural Electric Cooperative - Solar Water Heater Rebate Program < Back Eligibility Agricultural Commercial Residential Savings Category Heating & Cooling Solar Water Heating Program Info State Iowa Program Type Utility Rebate Program Rebate Amount $500 Provider Linn County Rural Electric Cooperative Association Linn County Rural Electric Cooperative Association (Linn County RECA) is a member-owned cooperative. To encourage energy efficiency, Linn County offers a number of rebates to commercial, residential, and agricultural customers. Owners of both new construction and existing buildings are eligible for a $500 rebate for solar water heaters. The water heaters must have an auxiliary tank of at least 40 gallons and the solar water heater

145

Rock Hill Utilities - Water Heater and Heat Pump Rebate Program |  

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

Rock Hill Utilities - Water Heater and Heat Pump Rebate Program Rock Hill Utilities - Water Heater and Heat Pump Rebate Program Rock Hill Utilities - Water Heater and Heat Pump Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Program Info State South Carolina Program Type Utility Rebate Program Rebate Amount Water Heater: up to $275 Heat Pump Replacement: $400 Provider Rock Hill Utilities Through the SmartChoice program, Rock Hill Utilities offers rebates for water heater and heat pump replacements. Information on financing for heat pumps can also be found on the web site listed above. If both the water heater and heat pump are purchased then the customer may qualify for the Great Rate program. The Great Rate program will add a 25% discount to a

146

Carbon Dioxide Heat Pump Water Heater Research Project | Department of  

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

Emerging Technologies » Carbon Dioxide Heat Pump Water Heater Emerging Technologies » Carbon Dioxide Heat Pump Water Heater Research Project Carbon Dioxide Heat Pump Water Heater Research Project The U.S. Department of Energy is currently conducting research into carbon dioxide (CO2) heat pump water heaters. This project will employ innovative techniques to adapt water heating technology to meet U.S. market requirements, including specifications, cost, and performance targets. Carbon dioxide is a refrigerant with a global warming potential (GWP) of 1. The CO2 heat pump water heater research seeks to develop an improved life cycle climate performance compared to conventional refrigerants. For example, R134a, another type of refrigerant, has a GWP of 1,300. Project Description This project seeks to develop a CO2-based heat pump water heater (HPWH)

147

Aiken Electric Cooperative Inc - Residential Water Heater Rebate Program |  

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

Aiken Electric Cooperative Inc - Residential Water Heater Rebate Aiken Electric Cooperative Inc - Residential Water Heater Rebate Program Aiken Electric Cooperative Inc - Residential Water Heater Rebate Program < Back Eligibility Residential Savings Category Appliances & Electronics Water Heating Program Info State South Carolina Program Type Utility Rebate Program Rebate Amount Free high efficiency water Heater; $200 installation fee Water heater and timer with normal installation: $2.50 credit for 10 years Timer only: $200 cash payment and $2.50 credit for 10 years New construction contract home: $250 Provider Aiken Electric Cooperative Aiken Electric Cooperative offers residential members rebates for installing high-efficiency electric water heaters and/or timers in their homes. Customers have four rebate options:

148

Coweta-Fayette EMC - Residential Solar Water Heater Rebate Program  

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

Coweta-Fayette EMC - Residential Solar Water Heater Rebate Program Coweta-Fayette EMC - Residential Solar Water Heater Rebate Program (Georgia) Coweta-Fayette EMC - Residential Solar Water Heater Rebate Program (Georgia) < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Program Info State Georgia Program Type Utility Rebate Program Rebate Amount Existing Homes Solar Water Heater: $750 New Homes Solar Water Heater: $1,250 - $1,500 Provider Coweta-Fayette Electric Membership Corporation Coweta-Fayette Electric Membership Corporation (EMC) provides electric and natural gas service to 58,000 customers in Georgia's Coweta, Fayette, Meriwether, Heard, Troop and Fulton counties. Currently, Coweta-Fayette EMC offers rebates on solar water heaters from $750 up to $1,500 as part of the Touchstone Energy Home Program. Solar

149

The Trials and Tribulations of Testing Water Heaters  

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

The Trials and Tribulations of Testing Water Heaters The Trials and Tribulations of Testing Water Heaters Speaker(s): James Lutz Date: August 14, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Julie Osborn During our work on efficiency standards for electric water heaters, we discovered significant discrepancies between the rated and tested efficiencies of the highest rated electric resistance water heaters. For high efficiency electric resistance water heaters with an Energy Factor above .92, the heat losses are so small that minor flaws in the tank or obscure problems in the test procedure become more apparent. This seminar reports on our investigation into the causes of inconsistent results obtained during testing of high efficiency electric resistance water heaters at different test labs. We discovered some reasons for the

150

A Simple Method to Continuous Measurement of Energy Consumption of Tank Less Gas Water Heaters for Commercial Buildings  

E-Print Network (OSTI)

energy consumptions of hot water supply in restaurants or residential houses are large amount, guidelines for optimal design are not presented. measurements of energy consumption of tank less gas water heaters very difficult unless gas flow meters were installed. however a gas flow meters is hardly installed for individual heater. in this study, a simple method to estimate gas consumption of such appliances form temperature of exhaust gas and electric current was presented. experiments of japanese major hot water gas heaters were conducted change under conditions of various water flow rate at constant output temperature. the empirical equations, which related gas consumption to exhaust gas temperature and operative current, were obtained for each type of water heaters, each manufacturer and overall heaters. verification of the method was conducted at a commercial building. some thresholds to decide status of operation, such as anti-freeze operation, were set, and sufficient accuracy of around 10 % error was achieved.

Yamaha, M.; Fujita, M.; Miyoshi, T.

2006-01-01T23:59:59.000Z

151

Advances in the Research of Heat Pump Water Heaters  

E-Print Network (OSTI)

This paper presents the progress of many recently correlative research works on the heat pump water heater (HPWH) and on solar-assisted heat pump water heaters. The advances in the research on compressor development, alternative refrigerant technology for a compressor HPWH are separately summarized. A new study on frosting/defrosting of an air source heat pump water heater (ASHPWH) is also discussed. The trends of some new technologies of HPWH are analyzed.

Shan, S.; Wang, D.; Wang, R.

2006-01-01T23:59:59.000Z

152

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

153

Preliminary Modeling, Testing and Analysis of a Gas Tankless Water Heater  

SciTech Connect

Tankless water heaters offer significant energy savings over conventional storage-tank water heaters, because thermal losses to the environment are much less. Although standard test results are available to compare tankless heaters with storage tank heaters, actual savings depend on the draw details because energy to heat up the internal mass depends on the time since the last draw. To allow accurate efficiency estimates under any assumed draw pattern, a one-node model with heat exchanger mass is posed here. Key model parameters were determined from test data. Burner efficiency showed inconsistency between the two data sets analyzed. Model calculations show that efficiency with a realistic draw pattern is {approx}8% lower than that resulting from using only large {approx}40 liter draws, as specified in standard water-heater tests. The model is also used to indicate that adding a small tank controlled by the tankless heater ameliorates unacceptable oscillations that tankless with feedback control can experience with pre-heated water too hot for the minimum burner setting. The added tank also eliminates problematic low-flow cut-out and hot-water-delay, but it will slightly decrease efficiency. Future work includes model refinements and developing optimal protocols for parameter extraction.

Burch, J.; Thornton, J.; Hoeschele, M.; Springer, D.; Rudd, A.

2008-01-01T23:59:59.000Z

154

Economics of Residential Gas Furnaces and Water Heaters in United...  

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

driven by first cost considerations and the availability of power vent and condensing water heaters. Little analysis has been performed to assess the economic impacts of the...

155

Economics of Residential Gas Furnaces and Water Heaters in United...  

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

single-family home construction market, the choice of what gas furnace and gas water heater combination to install is primarily driven by first cost considerations. In this...

156

Cost of Increased Energy Efficiency for Residential Water Heaters  

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

distributor, and installer costs are used to calculate the costs of different water heater designs. Consumer operating expenses are calculated based on the modeled energy...

157

NREL Develops Heat Pump Water Heater Simulation Model (Fact Sheet)  

SciTech Connect

A new simulation model helps researchers evaluate real-world impacts of heat pump water heaters in U.S. homes.

Hudon, K.

2012-05-01T23:59:59.000Z

158

Energy Saving Absorption Heat Pump Water Heater - Energy ...  

ORNL’s new absorption heat pump and water heater technology offers substantial energy savings and can reduce the use of fossil fuels by buildings. While ...

159

Condensing Side-Arm Water Heater - Energy Innovation Portal  

The condensing side-arm element recirculates exhaust gases into heating the cooler part of a water heater tank by the ... Building Energy ... Solar Thermal;

160

Clark Public Utilities - Solar Water Heater Rebate | Department of Energy  

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

Clark Public Utilities - Solar Water Heater Rebate Clark Public Utilities - Solar Water Heater Rebate Clark Public Utilities - Solar Water Heater Rebate < Back Eligibility Commercial Residential Savings Category Heating & Cooling Solar Water Heating Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount $500 Provider Clark PUD Clark Public Utilities offers a rebate of $500 to customers who install a solar water heating system. Customers must own the residence or business where the solar water heating system is installed and must have an electric water heater. In addition, Clark Public Utilities offers a [http://dsireusa.org/incentives/incentive.cfm?Incentive_Code=WA29F&re=1&ee=1 loan program] for eligible solar water heater equipment. For additional information, call Energy Services at (360) 992-3355.

Note: This page contains sample records for the topic "hot water heater" 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

Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Rebate  

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

Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Rebate Program Clay Electric Cooperative, Inc - Energy Smart Solar Water Heater Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate $600 Program Info State Florida Program Type Utility Rebate Program Rebate Amount 0.01 per BTU output Provider Clay Electric Co-op Clay Electric Cooperative (CEC) provides a rebate of $0.01 per BTU output to its residential members when they purchase qualified solar water heaters. This rebate is capped at 60,000 BTUs per system, or $600. Eligible solar water heaters can be either passive or active systems. The proposed solar system must meet Florida Solar Energy Center (FSEC) specifications and be installed by a contractor certified to install solar water heating

162

Solar Water Heater Rebate Program (U.S. Virgin Islands) | Department...  

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

Solar Water Heater Rebate Program (U.S. Virgin Islands) Solar Water Heater Rebate Program (U.S. Virgin Islands) Eligibility Residential Savings For Heating & Cooling Solar Water...

163

Tri-County Electric Cooperative - Energy Efficient Water Heater Rebate  

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

Tri-County Electric Cooperative - Energy Efficient Water Heater Tri-County Electric Cooperative - Energy Efficient Water Heater Rebate Program Tri-County Electric Cooperative - Energy Efficient Water Heater Rebate Program < Back Eligibility Commercial Residential Savings Category Appliances & Electronics Water Heating Program Info State Texas Program Type Utility Rebate Program Rebate Amount $75 Provider Tri-County Electric Cooperative Tri-County Electric Cooperative offers a $75 rebate on the purchase of energy-efficient electric water heaters. The rebate is valid for new or replacement units which have an Energy Factor Rating of 0.90 or higher. The minimum tank size is 40 gallons, with a minimum 4,500 watt heating element. For validation purposes, a copy of the sales or installation receipt must accompany the [http://www.tcectexas.com/Forms/water%20heater%20rebate%20form.pdf

164

Design and Application of Solar Water Heater Intelligent Control System  

Science Conference Proceedings (OSTI)

Solar water heater intelligent control system is made up of four modules which are data acquisition module, single-chip control module, the implementation and regulation module and human- machine interaction module. The problems of automatic detection ... Keywords: Solar Water Heater, Hardware Design, Detection and Control

Yu Gui Yin

2009-10-01T23:59:59.000Z

165

Cost of Increased Energy Efficiency for Residential Water Heaters  

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

Cost of Increased Energy Efficiency for Residential Water Heaters Cost of Increased Energy Efficiency for Residential Water Heaters Speaker(s): Alex Lekov Date: March 22, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Julie Osborn This presentation describes the analysis of the costs of increased energy efficiency for residential water heaters. Here, we focus on the cost and efficiency data for electric and gas-fired water heaters. This data formed the basis of the Technical Support Document for the Department of Energy's (DOE) Final Rule on Water Heaters. The engineering analysis uses computer simulation models to investigate the efficiency improvements due to design options and combinations thereof. The analysis covers four polyurethane foam insulation types based on non-ozone-depleting substances as blowing

166

Solar water heater installation guidelines. A manual for homeowners and professionals. [Includes glossary  

SciTech Connect

The guidelines include detailed diagrams, a selected glossary, a bibliography of books and manuals which might prove useful and a checklist which should be used during and after the installation. The guidelines explain generally how to install a liquid solar hot water heater, but not a specific system. The following are covered: collector location, collector installation, plumbing, solar storage tanks, electrical, and insulation. (MHR)

1978-04-01T23:59:59.000Z

167

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network (OSTI)

test procedures for solar water heaters characterizes systemWasted water Solar Heat pump water heater Australia/Newwater_heaters/Annex_IV_8July08 International Organization for Standardization, "Draft International Standard ISO/DIS 9459-4 Solar

Lutz, Jim

2012-01-01T23:59:59.000Z

168

Georgia Power- Residential Solar and Heat Pump Water Heater Rebate (Georgia)  

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

Georgia Power customers may be eligible for rebates up to $250 each toward the installation costs of a 50 gallon or greater solar water heater or heat pump water heater. The solar water heater or...

169

Buildings Energy Data Book: 5.4 Water Heaters  

Buildings Energy Data Book (EERE)

4 Water Heater Stock for Commercial Buildings, By Fuel Type Fuel Type Electric 41% Natural Gas 31% Fuel Oil 2% PropaneLPG 3% District Heat 1% No Water Heating 25% Note(s):...

170

Carbon Dioxide-Based Heat Pump Water Heater Research Project  

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

The U.S. Department of Energy is currently conducting research into carbon dioxide (CO2) heat pump water heaters. This project will employ innovative techniques to adapt water heating technology to...

171

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

E-Print Network (OSTI)

G. Rosenquist. 1998. WHAM: A Simplified Energy ConsumptionWater Heater Analysis Model (WHAM) calculation method, whichcharacteristics of water heaters, WHAM uses parameters from

Lekov, Alex

2011-01-01T23:59:59.000Z

172

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

appliance_standards/residential/water_ pool_heaters_prelim_Star (2008). Energy star residential water heaters: Finalefficiency improvements for residential gas furnaces in the

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

173

Solar Water Heater Roadmap Leads Path to Market Expansion (Fact Sheet)  

Science Conference Proceedings (OSTI)

Innovative strategy to reduce installed cost of solar water heater systems can rival conventional natural gas water heaters in the marketplace.

Not Available

2012-09-01T23:59:59.000Z

174

Blue Ridge Mountain Electric Membership Corporation - Water Heater Rebate  

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

You are here You are here Home » Blue Ridge Mountain Electric Membership Corporation - Water Heater Rebate Program Blue Ridge Mountain Electric Membership Corporation - Water Heater Rebate Program < Back Eligibility Residential Savings Category Home Weatherization Commercial Weatherization Sealing Your Home Heating & Cooling Commercial Heating & Cooling Cooling Construction Design & Remodeling Ventilation Manufacturing Heat Pumps Appliances & Electronics Water Heating Program Info State Georgia Program Type Utility Rebate Program Rebate Amount In-Home Energy Evaluation Program Windows: $500 Duct Repair: $500 Rehabilitation Work: $250 HVAC Replacement: $250/unit HVAC Tune-up: $150/unit Insulation: $500 Water Heater and Pipe Insulation: $50 Air Sealing: $500 Energy Right Program

175

New Braunfels Utilities - Residential Solar Water Heater Rebate Program |  

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

New Braunfels Utilities - Residential Solar Water Heater Rebate New Braunfels Utilities - Residential Solar Water Heater Rebate Program New Braunfels Utilities - Residential Solar Water Heater Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Program Info State Texas Program Type Utility Rebate Program Rebate Amount $0.265/kWh Provider New Braunfels Utilities New Braunfels Utilities offers a rebate for residential customers who purchase and install solar water heating systems on eligible homes. A rebate of the equivalent of $0.265 per kWh is available to these customers. The maximum rebate amount is $900 for participating customers. Applicants must have an active residential electric service account with NBU in order to be eligible. Solar water heaters must preheat water for an electric

176

The Impact of Blowing Agents on Residential Water Heater Performance  

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

The Impact of Blowing Agents on Residential Water Heater Performance The Impact of Blowing Agents on Residential Water Heater Performance Title The Impact of Blowing Agents on Residential Water Heater Performance Publication Type Report LBNL Report Number LBNL-47352 Year of Publication 2001 Authors Lekov, Alexander B., James D. Lutz, Camilla Dunham Whitehead, and James E. McMahon Document Number LBNL-47352 Date Published January 12 Abstract The National Appliance Energy Conservation Act of 1987 (NAECA) requires the U.S. Department of Energy (DOE) to consider amendments to the energy conservation standards to increase energy efficiency in residential water heaters. A driving force affecting efficiency is the ozone-depletion regulation regarding blowing agents for insulation in all water heater fuel types. This paper presents results of cost and efficiency impacts of three potential blowing agents. Residential water heaters are typically insulated with polyurethane foam in the space between the tank and the jacket. Currently, water heater manufacturers use HCFC-141b, an ozone-depleting substance, as a blowing agent. After 2003, as a result of the Montreal Protocol (1993), manufacturers must use blowing agents that do not deplete the ozone layer. The analysis presented in this paper considers three replacement candidates, HFC-245fa, HFC-134a, and cyclopentane by comparing their efficiency and cost effectiveness when applied to water heater insulation. This analysis used computer simulation models and other analytical methods to investigate the efficiency improvements due to different design options, when alternative blowing agents are applied. The calculations were based on the DOE test procedure for residential water heaters. The analysis used average manufacturer, retailer, and installer costs to calculate the total consumer costs. Consumer operating expenses were calculated based on modeled energy consumption under test procedure conditions and U.S. average energy prices. With this information, a cost-efficiency relationship was developed to show the average manufacturer and consumer cost to achieve increased efficiency.

177

Multifamily Heat Pump Water Heater Evaluation  

SciTech Connect

Although heat pump water heaters (HPWHs) have gained significant attention in recent years as a high efficiency electric water heating solution for single family homes, central HPWHs for commercial or multi-family applications are not as well documented in terms of measured performance and cost effectiveness. To evaluate this technology, the Alliance for Residential Building Innovation team monitored the performance of a 10.5 ton central HPWH installed on a student apartment building at the West Village Zero Net Energy Community in Davis, California. Monitoring data collected over a 16 month period were then used to validate a TRNSYS simulation model. The TRNSYS model was then used to project performance in different climates using local electric rates. Results of the study indicate that after some initial commissioning issues, the HPWH operated reliably with an annual average efficiency of 2.12 (Coefficient of Performance). The observed efficiency was lower than the unit's rated efficiency, primarily due to the fact that the system rarely operated under steady-state conditions. Changes in the system configuration, storage tank sizing, and control settings would likely improve the observed field efficiency. Modeling results suggest significant energy savings relative to electric storage water heating systems (typical annual efficiencies around 0.90) providing for typical simple paybacks of six to ten years without any incentives. The economics versus gas water heating are currently much more challenging given the current low natural gas prices in much of the country. Increased market size for this technology would benefit cost effectiveness and spur greater technology innovation.

Hoeschele, M.; Weitzel, E.

2013-11-01T23:59:59.000Z

178

Heat pump water heater and storage tank assembly  

DOE Patents (OSTI)

A water heater and storage tank assembly comprises a housing defining a chamber, an inlet for admitting cold water to the chamber, and an outlet for permitting flow of hot water from the chamber. A compressor is mounted on the housing and is removed from the chamber. A condenser comprises a tube adapted to receive refrigerant from the compressor, and winding around the chamber to impart heat to water in the chamber. An evaporator is mounted on the housing and removed from the chamber, the evaporator being adapted to receive refrigerant from the condenser and to discharge refrigerant to conduits in communication with the compressor. An electric resistance element extends into the chamber, and a thermostat is disposed in the chamber and is operative to sense water temperature and to actuate the resistance element upon the water temperature dropping to a selected level. The assembly includes a first connection at an external end of the inlet, a second connection at an external end of the outlet, and a third connection for connecting the resistance element, compressor and evaporator to an electrical power source.

Dieckmann, John T. (Belmont, MA); Nowicki, Brian J. (Watertown, MA); Teagan, W. Peter (Acton, MA); Zogg, Robert (Belmont, MA)

1999-09-07T23:59:59.000Z

179

Energy test method development for electric heat pump water heaters  

SciTech Connect

Modifications are proposed for the current US Department of Energy test procedures for water heaters in order to make them applicable to electric heat pump water heaters. The modifications are in the areas of definitions and technical procedures. The latter include the test conditions, test procedures and measurements, and calculations. Reasons for making these modifications and laboratory test data are provided to support the modifications in the technical procedures. The main modifications include: (1) lowering the water supply temperature from 70/sup 0/F to 55/sup 0/F, (2) lowering the tank thermostat setting from 160/sup 0/F to 145/sup 0/F to maintain the same 90/sup 0/F temperature rise, (3) measuring the power input instead of using the nameplate rating as in the case for an electric water heater, and (4) measuring the recovery efficiency instead of calculating it by using the standby losses in the case for an electric water heater.

Wan, C.A.

1980-01-01T23:59:59.000Z

180

Preliminary Modeling, Testing, and Analysis of a Gas Tankless Water Heater: Preprint  

DOE Green Energy (OSTI)

Today's gas tankless water heaters offer significant energy savings over conventional gas storage tank water heaters, but savings depends on the draw pattern. A one-node model incorporating heat exchanger mass is used to address this and other issues. Key model parameters are determined from least-squares regression on short-term data, including burner efficiency, thermal capacitance, and thermal loss coefficient. The calibrated model agrees with data to ~5% on Qgas, with temperature RMS deviation of ~4..deg..C. Efficiency with a standard realistic draw is 71%, compared to 81% predicted from standard energy-factors. Adding a small tank controlled by the tankless heater solves issues of oscillations with solar pre-heat, low-flow and hot-water-delay issues. Future work includes model refinements and developing optimal data protocols for model parameter extraction.

Burch, J.; Hoeschele, M.; Springer, D.; Rudd, A.

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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

Covered Product Category: Gas Storage Water Heaters | Department of Energy  

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

Gas Storage Water Heaters Gas Storage Water Heaters Covered Product Category: Gas Storage Water Heaters October 7, 2013 - 10:43am Addthis ENERGY STAR Qualified Products FEMP provides acquisition guidance across a variety of product categories, including gas storage water heaters, which are an ENERGY STAR®-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR. Performance Requirements for Federal Purchases For the most up-to-date efficiency levels required by ENERGY STAR, look for

182

New Home Buyer Solar Water Heater Trade-Off Study  

DOE Green Energy (OSTI)

This report details the results of a research conducted in 1998 and 1999 and outlines a marketing deployment plan designed for businesses interested in marketing solar water heaters in the new home industry.

Symmetrics Marketing Corporation

1999-08-18T23:59:59.000Z

183

An Overview of the New Residential Water Heater Efficiency Standards  

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

An Overview of the New Residential Water Heater Efficiency Standards Speaker(s): Alex Lekov Date: April 26, 2010 - 12:00pm Location: 90-3122 DOE issued new standards for...

184

Heat Pump Water Heaters and American Homes: A Good Fit?  

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

can be cost effective in all regionsfor most single family homes, especially when the water heater is not installed in a conditioned space. HPWHs are not cost effective for most...

185

Tankless Coil and Indirect Water Heaters | Department of Energy  

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

as it flows through a heating coil or heat exchanger installed in a main furnace or boiler. Tankless coil water heaters are most efficient during cold months when the heating...

186

Buildings Energy Data Book: 5.4 Water Heaters  

Buildings Energy Data Book (EERE)

1 Water Heater Stock for Residential Buildings, By Fuel Type Electric Natural Gas Fuel Oil PropaneLPG Other 0.2 0.2% Total (1) Note(s): Souce(s): According to RECS, 1.1 million...

187

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...

188

A comprehensive review of market research on solar water heaters  

DOE Green Energy (OSTI)

This is the second report of a four-task project to develop a marketing plan designed for businesses interested in marketing solar water heaters in the new home industry. The objective of this task is to identify key elements in previous studies on the marketing of solar water heaters in the new home industry. This review includes studies performed by FOCUS Marketing Services, the National Association of Home Builders Research Center, Symmetrics Marketing Corporation, and the California Energy Commission.

Ghent, P.; Keller, C.

1999-11-01T23:59:59.000Z

189

Determining Benefits and Costs of Improved Water Heater Efficiencies  

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

Determining Benefits and Costs of Improved Water Heater Efficiencies Determining Benefits and Costs of Improved Water Heater Efficiencies Title Determining Benefits and Costs of Improved Water Heater Efficiencies Publication Type Report LBNL Report Number LBNL-45618 Year of Publication 2000 Authors Lekov, Alexander B., James D. Lutz, Xiaomin Liu, Camilla Dunham Whitehead, and James E. McMahon Document Number LBNL-45618 Date Published May 4 Abstract Economic impacts on individual consumers from possible revisions to U.S. residential water heater energy-efficiency standards are examined using a life-cycle cost (LCC) analysis. LCC is the consumer's cost of purchasing and installing a water heater and operating it over its lifetime. This approach makes it possible to evaluate the economic impacts on individual consumers from the revised standards. The methodology allows an examination of groups of the population which benefit or lose from suggested efficiency standards. The results show that the economic benefits to consumers are significant. At the efficiency level examined in this paper, 35% of households with electric water heaters experience LCC savings, with an average savings of $106, while 4% show LCC losses, with an average loss of $40 compared to a pre-standard LCC average of $2,565. The remainder of the population (61%) are largely unaffected.

190

Commercial Gas Water Heaters, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)  

Science Conference Proceedings (OSTI)

Performance and purchasing specifications for commercial gas water heaters under the FEMP-designated product program.

Not Available

2010-09-01T23:59:59.000Z

191

Estimating the Cost and Energy Efficiency of a Solar Water Heater |  

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

Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater May 30, 2012 - 3:09pm Addthis Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR What does this mean for me? Solar water heaters cost more to purchase and install but may save you money in the long run. Estimate the annual operating costs and compare several solar water heaters to determine whether it is worth investing in a more efficient system. Solar water heating systems usually cost more to purchase and install than conventional water heating systems. However, a solar water heater can

192

Estimating the Cost and Energy Efficiency of a Solar Water Heater |  

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

Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater May 30, 2012 - 3:09pm Addthis Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR What does this mean for me? Solar water heaters cost more to purchase and install but may save you money in the long run. Estimate the annual operating costs and compare several solar water heaters to determine whether it is worth investing in a more efficient system. Solar water heating systems usually cost more to purchase and install than conventional water heating systems. However, a solar water heater can

193

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

194

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

195

List of Water Heaters Incentives | Open Energy Information  

Open Energy Info (EERE)

Heaters Incentives Heaters Incentives Jump to: navigation, search The following contains the list of 973 Water Heaters Incentives. CSV (rows 1-500) CSV (rows 501-973) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP Ohio - Commercial New Construction Energy Efficiency Rebate Program (Ohio) Utility Rebate Program Ohio Commercial Industrial Local Government Municipal Utility Nonprofit Schools State Government Central Air conditioners Chillers Comprehensive Measures/Whole Building Custom/Others pending approval Energy Mgmt. Systems/Building Controls Heat pumps Lighting Lighting Controls/Sensors Motor VFDs Motors Water Heaters Commercial Cooking Equipment Commercial Refrigeration Equipment Room Air Conditioners Yes AEP Public Service Company of Oklahoma - Residential Efficiency Rebate Program (Oklahoma) Utility Rebate Program Oklahoma Residential Building Insulation

196

A model for improvement of water heating heat exchanger designs for residential heat pump water heaters.  

E-Print Network (OSTI)

??Heat pump water heaters are a promising technology to reduce energy use and greenhouse gas emissions. A key component is the water heating heat exchanger.… (more)

Weerawoot, Arunwattana

2010-01-01T23:59:59.000Z

197

Outdoor Outfitter Gets Greener With Solar Water Heater | Department of  

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

Outdoor Outfitter Gets Greener With Solar Water Heater Outdoor Outfitter Gets Greener With Solar Water Heater Outdoor Outfitter Gets Greener With Solar Water Heater October 8, 2010 - 12:51pm Addthis L.L. Bean’s flagship store sees nearly 3 million visitors each year. The store now uses solar-heated water for showers, restrooms and two cafes. | Photo courtesy of L.L. Bean | L.L. Bean's flagship store sees nearly 3 million visitors each year. The store now uses solar-heated water for showers, restrooms and two cafes. | Photo courtesy of L.L. Bean | Lindsay Gsell L.L. Bean is known for its outdoor apparel- jackets, backpacks and cozy winter sweaters. However, the company does more than just dress for the outdoors, it also works to protect and preserve it. For nearly 100 years, L.L. Bean has been committed to environmental conservation and

198

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

199

Apparatus and method for controlling a heat pump water heater  

Science Conference Proceedings (OSTI)

A method and apparatus for controlling the operation of an add-on heat pump water heater unit is disclosed. A combination of a thermally conductive tube having a flattened portion and a thermostat mounted thereto is utilized to sense the temperature level of water in a tank to which the heater unit is connected. The tube and thermostat are additionally insulated from the ambient. A circulating pump is provided and connected to the water thermostat such that the pump is energized only when it is necessary to operate the heat energy adding unit.

Whitwell, R. J.; Schafer, J. P.

1984-01-08T23:59:59.000Z

200

FEMP Designated Product Assessment for Commercial Gas Water Heaters  

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

FEMP Designated Product Assessment for Commercial Gas Water Heaters FEMP Designated Product Assessment for Commercial Gas Water Heaters Title FEMP Designated Product Assessment for Commercial Gas Water Heaters Publication Type Report LBNL Report Number LBNL-5514E Year of Publication 2010 Authors Lutz, James D. Subsidiary Authors Energy Analysis Department Document Number LBNL-5514E Pagination 8 Date Published April 1 Publisher Lawrence Berkeley National Laboratory City Berkeley ISBN Number LBNL-5514E Abstract None Notes This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State, and Community Programs, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Attachment Size PDF 240.22 KB Google Scholar BibTex RIS RTF XML Alternate URL: http://eetd.lbl.gov/node/50317

Note: This page contains sample records for the topic "hot water heater" 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

Estimating the Cost and Energy Efficiency of a Solar Water Heater...  

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

Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater May 30, 2012 - 3:09pm Addthis Solar water...

202

NREL Tests Integrated Heat Pump Water Heater Performance in Different Climates (Fact Sheet)  

SciTech Connect

This technical highlight describes NREL tests to capture information about heat pump performance across a wide range of ambient conditions for five heat pump water heaters (HPWH). These water heaters have the potential to significantly reduce water heater energy use relative to traditional electric resistance water heaters. These tests have provided detailed performance data for these appliances, which have been used to evaluate the cost of saved energy as a function of climate. The performance of HPWHs is dependent on ambient air temperature and humidity and the logic controlling the heat pump and the backup resistance heaters. The laboratory tests were designed to measure each unit's performance across a range of air conditions and determine the specific logic controlling the two heat sources, which has a large effect on the comfort of the users and the energy efficiency of the system. Unlike other types of water heaters, HPWHs are both influenced by and have an effect on their surroundings. Since these effects are complex and different for virtually every house and climate region, creating an accurate HPWH model from the data gathered during the laboratory tests was a main goal of the project. Using the results from NREL's laboratory tests, such as the Coefficient of Performance (COP) curves for different air conditions as shown in Figure 1, an existing HPWH model is being modified to produce more accurate whole-house simulations. This will allow the interactions between the HPWH and the home's heating and cooling system to be evaluated in detail, for any climate region. Once these modeling capabilities are in place, a realistic cost-benefit analysis can be performed for a HPWH installation anywhere in the country. An accurate HPWH model will help to quantify the savings associated with installing a HPWH in the place of a standard electric water heater. In most locations, HPWHs are not yet a cost-effective alternative to natural gas water heaters. The detailed system performance maps that were developed by this testing program will be used to: (1) Target regions of the country that would benefit most from this technology; (2) Identify improvements in current systems to maximize homeowner cost savings; and (3) Explore opportunities for development of advanced hot water heating systems.

Not Available

2012-01-01T23:59:59.000Z

203

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,

204

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,

205

Development of an Accurate Feed-Forward Temperature Control Tankless Water Heater  

SciTech Connect

The following document is the final report for DE-FC26-05NT42327: Development of an Accurate Feed-Forward Temperature Control Tankless Water Heater. This work was carried out under a cooperative agreement from the Department of Energy's National Energy Technology Laboratory, with additional funding from Keltech, Inc. The objective of the project was to improve the temperature control performance of an electric tankless water heater (TWH). The reason for doing this is to minimize or eliminate one of the barriers to wider adoption of the TWH. TWH use less energy than typical (storage) water heaters because of the elimination of standby losses, so wider adoption will lead to reduced energy consumption. The project was carried out by Building Solutions, Inc. (BSI), a small business based in Omaha, Nebraska. BSI partnered with Keltech, Inc., a manufacturer of electric tankless water heaters based in Delton, Michigan. Additional work was carried out by the University of Nebraska and Mike Coward. A background study revealed several advantages and disadvantages to TWH. Besides using less energy than storage heaters, TWH provide an endless supply of hot water, have a longer life, use less floor space, can be used at point-of-use, and are suitable as boosters to enable alternative water heating technologies, such as solar or heat-pump water heaters. Their disadvantages are their higher cost, large instantaneous power requirement, and poor temperature control. A test method was developed to quantify performance under a representative range of disturbances to flow rate and inlet temperature. A device capable of conducting this test was designed and built. Some heaters currently on the market were tested, and were found to perform quite poorly. A new controller was designed using model predictive control (MPC). This control method required an accurate dynamic model to be created and required significant tuning to the controller before good control was achieved. The MPC design was then implemented on a prototype heater that was being developed simultaneously with the controller development. (The prototype's geometry and components are based on a currently marketed heater, but several improvements have been made.) The MPC's temperature control performance was a vast improvement over the existing controller. With a benchmark for superior control performance established, five additional control methods were tested. One problem with MPC control is that it was found to be extremely difficult to implement in a TWH, so that it is unlikely to be widely adopted by manufacturers. Therefore the five additional control methods were selected based on their simplicity; each could be implemented by a typical manufacturer. It was found that one of these methods performed as well as MPC, or even better under many circumstances. This method uses a Feedback-Compensated Feed-Forward algorithm that was developed for this project. Due to its simplicity and excellent performance this method was selected as the controller of choice. A final higher-capacity prototype heater that uses Feedback-Compensated Feed-Forward control was constructed. This prototype has many improvements over the currently marketed heaters: (1) excellent control; (2) a modular design that allows for different capacity heaters to be built easily; (3) built-in fault detection and diagnosis; (4) a secondary remote user-interface; and (5) a TRIAC switching algorithm that will minimize 'flicker factor'. The design and engineering of this prototype unit will allow it to be built without an increase in cost, compared with the currently marketed heater. A design rendering of the new product is shown below. It will be launched with a new marketing campaign by Keltech in early 2009.

David Yuill

2008-06-30T23:59:59.000Z

206

Measure Guideline: Heat Pump Water Heaters in New and Existing Homes  

Science Conference Proceedings (OSTI)

This Building America Measure Guideline is intended for builders, contractors, homeowners, and policy-makers. This document is intended to explore the issues surrounding heat pump water heaters (HPWHs) to ensure that homeowners and contractors have the tools needed to appropriately and efficiently install HPWHs. Heat pump water heaters (HPWHs) promise to significantly reduce energy consumption for domestic hot water (DHW) over standard electric resistance water heaters (ERWHs). While ERWHs perform with energy factors (EFs) around 0.9, new HPWHs boast EFs upwards of 2.0. High energy factors in HPWHs are achieved by combining a vapor compression system, which extracts heat from the surrounding air at high efficiencies, with electric resistance element(s), which are better suited to meet large hot water demands. Swapping ERWHs with HPWHs could result in roughly 50% reduction in water heating energy consumption for 35.6% of all U.S. households. This Building America Measure Guideline is intended for builders, contractors, homeowners, and policy-makers. While HPWHs promise to significantly reduce energy use for DHW, proper installation, selection, and maintenance of HPWHs is required to ensure high operating efficiency and reliability. This document is intended to explore the issues surrounding HPWHs to ensure that homeowners and contractors have the tools needed to appropriately and efficiently install HPWHs. Section 1 of this guideline provides a brief description of HPWHs and their operation. Section 2 highlights the cost and energy savings of HPWHs as well as the variables that affect HPWH performance, reliability, and efficiency. Section 3 gives guidelines for proper installation and maintenance of HPWHs, selection criteria for locating HPWHs, and highlights of important differences between ERWH and HPWH installations. Throughout this document, CARB has included results from the evaluation of 14 heat pump water heaters (including three recently released HPWH products) installed in existing homes in the northeast region of the United States.

Shapiro, C.; Puttagunta, S.; Owens, D.

2012-02-01T23:59:59.000Z

207

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

208

Sacramento area, solar domestic water heater installers survey report  

SciTech Connect

Information regarding generic type, make, and costs of solar domestic water heater (SDWH) systems in the Sacramento, Roseville, and Davis area is reported. Sixteen SDWH installers/do-it-yourself kit dealers were identified and surveyed by phone. The survey participants were divided into three categories: (1) installers in business for one year or longer, (eight firms); (2) installers in business less than one year, (five firms); and (3) SDWH do-it-yourself kit dealers, (three firms). The survey report establishes an average cost for SDWH pump systems for new single family unit production housing (1350 square feet), with hot water demand typical of an average family of four, and roof mounted collectors. For the first two categories, the SDWH system average cost is $2469 (this includes both open loop and heat exchanger systems with circulating pumps). The average cost of the open loop pump system is $2321; whereas, the heat exchanger pump system average cost is $2592. The participants were questioned concerning discounts they would offer to builders purchasing SDWH's in volume. From their responses, an 11% discount for a purchase of ten systems was derived for the first two installers categories. The average cost of an installed SDWH pump system purchased in a volume of ten units is $2201. The average cost of an installed SDWH open loop system is $2066, and a heat exchanger system is $2307. For the third category, the do-it-yourself kit dealers, a 12% discount was derived for a purchase of ten systems. The average cost of a do-it-yourself pump kit when purchased in a volume of ten units is $1481. The average cost of an open loop pump kit is $1386, and a heat exchanger pump kit is $1672.

Hutchcraft, T.

1979-11-01T23:59:59.000Z

209

Marketing and promoting solar water heaters to home builders  

DOE Green Energy (OSTI)

This is the final report of a four-task project to develop a marketing plan designed for businesses interested in marketing solar water heaters in the new home industry. This report outlines suggested marketing communication materials and other promotional tools focused on selling products to the new home builder. Information relevant to promoting products to the new home buyer is also included.

Keller, C.; Ghent, P.

1999-12-06T23:59:59.000Z

210

Buildings Energy Data Book: 5.4 Water Heaters  

Buildings Energy Data Book (EERE)

2 Water Heater Stock for Residential Buildings, By Storage Type Small (30 gallons or less) 17.1 17% 1.4 14% 18.5 17% Medium (31 to 49 gallons) 52.4 53% 2.4 24% 54.8 50% Large (50...

211

Demand Response Performance of GE Hybrid Heat Pump Water Heater  

SciTech Connect

This report describes a project to evaluate and document the DR performance of HPWH as compared to ERWH for two primary types of DR events: peak curtailments and balancing reserves. The experiments were conducted with GE second-generation “Brillion”-enabled GeoSpring hybrid water heaters in the PNNL Lab Homes, with one GE GeoSpring water heater operating in “Standard” electric resistance mode to represent the baseline and one GE GeoSpring water heater operating in “Heat Pump” mode to provide the comparison to heat pump-only demand response. It is expected that “Hybrid” DR performance, which would engage both the heat pump and electric elements, could be interpolated from these two experimental extremes. Signals were sent simultaneously to the two water heaters in the side-by-side PNNL Lab Homes under highly controlled, simulated occupancy conditions. This report presents the results of the evaluation, which documents the demand-response capability of the GE GeoSpring HPWH for peak load reduction and regulation services. The sections describe the experimental protocol and test apparatus used to collect data, present the baselining procedure, discuss the results of the simulated DR events for the HPWH and ERWH, and synthesize key conclusions based on the collected data.

Widder, Sarah H.; Parker, Graham B.; Petersen, Joseph M.; Baechler, Michael C.

2013-07-01T23:59:59.000Z

212

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

213

Economics of residential gas furnaces and water heaters in United States new construction market  

E-Print Network (OSTI)

D. Winiarski. (1999). WHAM: Simplified tool for calculatingDepartment of Energy 2009b). WHAM yields total water heaterWater Heater Analysis Model (WHAM) method (Lutz et al. 1999)

Lekov, Alex B.

2010-01-01T23:59:59.000Z

214

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

Winiarski, D. (1999). WHAM: Simplified tool for calculatingDepartment of Energy 2009b). WHAM yields total water-heaterWater Heater Analysis Model (WHAM) method (Lutz et al. 1999)

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

215

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...

216

Modeling and Test-and-Rate Methods for Innovative Thermosiphon Solar Water Heaters: Preprint  

SciTech Connect

Conference paper regarding research in modeling and test-and-rate methods for thermosiphon solar domestic water heaters.

Burch, J.; Shoukas, G.; Brandemuhl, M.; Krarti, M.

2006-05-01T23:59:59.000Z

217

Whole-Home Gas Tankless Water Heaters, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)  

SciTech Connect

Performance and purchasing specifications for whole-home gas water heaters under the FEMP-designated product program.

2010-06-01T23:59:59.000Z

218

Economics of residential gas furnaces and water heaters in United States new construction market  

E-Print Network (OSTI)

Refrigeration Institute 2008a). The efficiency of water heaters, depending on the rated volume and other design

Lekov, Alex B.

2010-01-01T23:59:59.000Z

219

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

Refrigeration Institute 2008a). The efficiency of water heaters, depending on the rated volume and other design

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

220

Diagnosis of Solar Water Heaters Using Solar Storage Tank Surface Temperature Data: Preprint  

DOE Green Energy (OSTI)

Study of solar water heaters by using surface temperature data of solar storage tanks to diagnose proper operations.

Burch, J.; Magnuson, L.; Barker, G.; Bullwinkel, M.

2009-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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

Field Performance of Heat Pump Water Heaters in the Northeast  

SciTech Connect

Heat pump water heaters (HPWHs) are finally entering the mainstream residential water heater market. Potential catalysts are increased consumer demand for higher energy efficiency electric water heating and a new Federal water heating standard that effectively mandates use of HPWHs for electric storage water heaters with nominal capacities greater than 55 gallons. When compared to electric resistance water heating, the energy and cost savings potential of HPWHs is tremendous. Converting all electric resistance water heaters to HPWHs could save American consumers 7.8 billion dollars annually ($182 per household) in water heating operating costs and cut annual residential source energy consumption for water heating by 0.70 quads. Steven Winter Associates, Inc. embarked on one of the first in situ studies of these newly released HPWH products through a partnership with two sponsoring electric utility companies, National Grid and NSTAR, and one sponsoring energy efficiency service program administrator, Cape Light Compact. Recent laboratory studies have measured performance of HPWHs under various operating conditions, but publicly available field studies have not been as available. This evaluation attempts to provide publicly available field data on new HPWHs by monitoring the performance of three recently released products (General Electric GeoSpring(tm), A.O. Smith Voltex(r), and Stiebel Eltron Accelera(r)300). Fourteen HPWHs were installed in Massachusetts and Rhode Island and monitored for over a year. Of the 14 units, ten were General Electric models (50 gallon units), two were Stiebel Eltron models (80 gallon units), and two were A.O. Smith models (one 60-gallon and one 80-gallon unit).

Shapiro, C.; Puttagunta, S.

2013-08-01T23:59:59.000Z

222

Energy Efficient Condensing Side-arm Gas Water Heater - Energy ...  

Hydrogen and Fuel Cell; Hydropower, Wave and ... thereby eliminating standby energy losses that occur when heat is transferred from the hot water to ...

223

Fault diagnosis of regenerative water heater based-on multi-class support vector machines  

Science Conference Proceedings (OSTI)

The main idea of multi-class support vector machines (SVMs) is described. a multi-class model for regenerative water heater fault diagnosis is presented combining the fuzzy logic and SVMs. The typical faults set of regenerative water heater is built ... Keywords: fault diagnosis, fuzzy rules, regenerative water heater, steam turbine, support vector machines

Lei Wang; Rui-Qing Zhang

2009-08-01T23:59:59.000Z

224

Fault Diagnosis of Regenerative Water Heater Based-On Multi-class Support Vector Machines  

Science Conference Proceedings (OSTI)

The main idea of multi-class support vector machines (SVMs) is described. a multi-class model for regenerative water heater fault diagnosis is presented combining the fuzzy logic and SVMs. The typical faults set of regenerative water heater is built ... Keywords: steam turbine, regenerative water heater, fuzzy rules, support vector machines, fault diagnosis

Lei Wang; Rui-qing Zhang

2009-08-01T23:59:59.000Z

225

Applications Tests of Commercial Heat Pump Water Heaters  

E-Print Network (OSTI)

Field application tests have been conducted on three 4 to 6-ton commercial heat pump water heater systems in a restaurant, a coin-operated laundry, and an office building cafeteria in Atlanta. The units provide space cooling while rejecting heat to a water heating load. The tests, conducted for Georgia Power Company, examined both quantitative and qualitative aspects of the heat pumps and the overall water heating systems. The results provide valuable insight into the actual operating characteristics of heat pump water heaters and useful guidelines for system design and operation. The capacity and efficiency of the units agreed with manufacturers' specifications. COP values ranged from 2 .6 to 3.0 for water heating only, and from 4.1 to 5.0 when space cooling benefit was included. It was concluded that heat pump water heaters can provide economical water heating and space conditioning. However, application sites must be selected within certain constraints and a minimum level of operating control and maintenance must be observed.

Oshinski, J. N..; Abrams, D. W.

1987-01-01T23:59:59.000Z

226

Impact of Pilot Light Modeling on the Predicted Annual Performance of Residential Gas Water Heaters: Preprint  

SciTech Connect

Modeling residential water heaters with dynamic simulation models can provide accurate estimates of their annual energy consumption, if the units? characteristics and use conditions are known. Most gas storage water heaters (GSWHs) include a standing pilot light. It is generally assumed that the pilot light energy will help make up standby losses and have no impact on the predicted annual energy consumption. However, that is not always the case. The gas input rate and conversion efficiency of a pilot light for a GSWH were determined from laboratory data. The data were used in simulations of a typical GSWH with and without a pilot light, for two cases: 1) the GSWH is used alone; and 2) the GSWH is the second tank in a solar water heating (SWH) system. The sensitivity of wasted pilot light energy to annual hot water use, climate, and installation location was examined. The GSWH used alone in unconditioned space in a hot climate had a slight increase in energy consumption. The GSWH with a pilot light used as a backup to an SWH used up to 80% more auxiliary energy than one without in hot, sunny locations, from increased tank losses.

Maguire, J.; Burch, J.

2013-08-01T23:59:59.000Z

227

Assessment of Unglazed Solar Domestic Water Heaters  

SciTech Connect

Conference paper investigating cost-performance tradeoffs in replacing glazed collectors with unglazed collectors in solar domestic water heating systems.

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

2005-12-01T23:59:59.000Z

228

Evaluation of TANK Water Heater Simulation Model as Embedded in HWSim  

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

TANK Water Heater Simulation Model as Embedded in HWSim TANK Water Heater Simulation Model as Embedded in HWSim Title Evaluation of TANK Water Heater Simulation Model as Embedded in HWSim Publication Type Report LBNL Report Number LBNL-5092E Year of Publication 2010 Authors Lutz, James D. Document Number LBNL-5092E Pagination 11 Date Published December 22 Publisher Lawrence Berkeley National Laboratory City Berkeley ISBN Number LBNL-5092E Abstract This report evaluates the hot water temperatures and flow rates as calculated by the combined HWSim and TANK simulation models. Notes This work was sponsored by the Gas Technology Institute (GTI) which is funded by the California Energy Commission, Public Interest Energy Research (PIER) Program, under Residential Water Heating Program Contract No. 500-08-060. This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State, and Community Programs, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

229

Orlando Utilities Commission - Residential Solar Water Heater...  

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

Program (Florida) < Back Eligibility Residential Savings Category Heating & Cooling Solar Water Heating Maximum Rebate 1,000 Program Info State Florida Program Type Utility...

230

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

231

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

232

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

233

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network (OSTI)

is ?open. ? An open air intake water heater is assigned theof air intake, physical size and load profile of the waterwater heater does not consume a fossil fuel, the air-intake

Lutz, Jim

2012-01-01T23:59:59.000Z

234

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

235

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

236

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

237

Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters  

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

Performance Performance Evaluation of Residential Integrated Heat Pump Water Heaters B. Sparn, K. Hudon, and D. Christensen Technical Report NREL/TP-5500-52635 September 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters B. Sparn, K. Hudon, and D. Christensen Prepared under Task Nos. WTN9.1000, ARRB.2204 Technical Report NREL/TP-5500-52635 September 2011 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

238

Model for Aggregated Water Heater Load Using Dynamic Bayesian Networks  

Science Conference Proceedings (OSTI)

The transition to the new generation power grid, or “smart grid”, requires novel ways of using and analyzing data collected from the grid infrastructure. Fundamental functionalities like demand response (DR), that the smart grid needs, rely heavily on the ability of the energy providers and distributors to forecast the load behavior of appliances under different DR strategies. This paper presents a new model of aggregated water heater load, based on dynamic Bayesian networks (DBNs). The model has been validated against simulated data from an open source distribution simulation software (GridLAB-D). The results presented in this paper demonstrate that the DBN model accurately tracks the load profile curves of aggregated water heaters under different testing scenarios.

Vlachopoulou, Maria; Chin, George; Fuller, Jason C.; Lu, Shuai; Kalsi, Karanjit

2012-07-19T23:59:59.000Z

239

Passive preheating of water-heater feed water (using attic heat)  

DOE Green Energy (OSTI)

Baseboard convectors were installed in a house attic to preheat water prior to entering the home water heater. The system was monitored and not found to be cost effective. (LEW)

Knudsen, E.T. Jr.

1982-01-01T23:59:59.000Z

240

Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater  

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

Carbon Dioxide-Based Carbon Dioxide-Based Heat Pump Water Heater Research Project to someone by E-mail Share Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on Facebook Tweet about Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on Twitter Bookmark Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on Google Bookmark Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on Delicious Rank Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on Digg Find More places to share Building Technologies Office: Carbon Dioxide-Based Heat Pump Water Heater Research Project on AddThis.com...

Note: This page contains sample records for the topic "hot water heater" 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

Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater  

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

Gas-Fired Absorption Gas-Fired Absorption Heat Pump Water Heater Research Project to someone by E-mail Share Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on Facebook Tweet about Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on Twitter Bookmark Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on Google Bookmark Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on Delicious Rank Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on Digg Find More places to share Building Technologies Office: Gas-Fired Absorption Heat Pump Water Heater Research Project on AddThis.com...

242

Inherent freeze protection for solar water heaters  

SciTech Connect

Research and development of a method for protection of a solar collector from freezing is described. The method is shown to be technically and economically feasible. A prototype water heating system using the inherent freeze protection method was successfully operated during the winter of 1980 to 1981.

Jeter, S.M.; Leonaitis, L.L.; Leonaitis, L.L.

1981-05-01T23:59:59.000Z

243

Electric Water Heater Modeling and Control Strategies for Demand Response  

Science Conference Proceedings (OSTI)

Abstract— Demand response (DR) has a great potential to provide balancing services at normal operating conditions and emergency support when a power system is subject to disturbances. Effective control strategies can significantly relieve the balancing burden of conventional generators and reduce investment on generation and transmission expansion. This paper is aimed at modeling electric water heaters (EWH) in households and tests their response to control strategies to implement DR. The open-loop response of EWH to a centralized signal is studied by adjusting temperature settings to provide regulation services; and two types of decentralized controllers are tested to provide frequency support following generator trips. EWH models are included in a simulation platform in DIgSILENT to perform electromechanical simulation, which contains 147 households in a distribution feeder. Simulation results show the dependence of EWH response on water heater usage . These results provide insight suggestions on the need of control strategies to achieve better performance for demand response implementation. Index Terms— Centralized control, decentralized control, demand response, electrical water heater, smart grid

Diao, Ruisheng; Lu, Shuai; Elizondo, Marcelo A.; Mayhorn, Ebony T.; Zhang, Yu; Samaan, Nader A.

2012-07-22T23:59:59.000Z

244

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...

245

Comparing Heat Pump Water Heaters (HPWHs) to Traditional Resistive Water Heaters: Assessing HPWH Performance for Southern Company  

Science Conference Proceedings (OSTI)

In 2009, Southern Company partnered with the Electric Power Research Institute (EPRI) to investigate the use of heat pump water heaters (HPWH) technology. The investigation was part of EPRI's Energy Efficiency Demonstration, which was a field-performance assessment of six emerging, efficient end-use technologies, deployed with extensive measurement instrumentation at multiple sites throughout the U.S. The goals of the multiyear project were to test, evaluate, demonstrate, and—if ...

2013-09-04T23:59:59.000Z

246

Laboratory Evaluation of Gas-Fired Tankless and Storage Water Heater Approaches to Combination Water and Space Heating  

SciTech Connect

Homebuilders are exploring more cost effective combined space and water heating systems (combo systems) with major water heater manufacturers that are offering pre-engineered forced air space heating combo systems. In this project, unlike standardized tests, laboratory tests were conducted that subjected condensing tankless and storage water heater based combo systems to realistic, coincidental space and domestic hot water loads with the following key findings: 1) The tankless combo system maintained more stable DHW and space heating temperatures than the storage combo system. 2) The tankless combo system consistently achieved better daily efficiencies (i.e. 84%-93%) than the storage combo system (i.e. 81%- 91%) when the air handler was sized adequately and adjusted properly to achieve significant condensing operation. When condensing operation was not achieved, both systems performed with lower (i.e. 75%-88%), but similar efficiencies. 3) Air handlers currently packaged with combo systems are not designed to optimize condensing operation. More research is needed to develop air handlers specifically designed for condensing water heaters. 4) System efficiencies greater than 90% were achieved only on days where continual and steady space heating loads were required with significant condensing operation. For days where heating was more intermittent, the system efficiencies fell below 90%.

Kingston, T.; Scott, S.

2013-03-01T23:59:59.000Z

247

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

SciTech Connect

The U.S. Department of Energy (DOE) recently completed a rulemaking process in which it amended the existing energy efficiency standards for residential water heaters. A key factor in DOE?s consideration of new standards is the economic impacts on consumers. Determining such impacts requires a comparison of the additional first cost of energy efficiency design options with the savings in operating costs. This paper describes the method used to conduct the life-cycle cost (LCC) and payback period analysis for gas and electric storage water heaters. It presents the estimated change in LCC associated with more energy-efficient equipment, including heat pump electric water heaters and condensing gas water heaters, for a representative sample of U.S. homes. The study included a detailed accounting of installation costs for the considered design options, with a focus on approaches for accommodating the larger dimensions of more efficient water heaters. For heat pump water heaters, the study also considered airflow requirements, venting issues, and the impact of these products on the indoor environment. The results indicate that efficiency improvement relative to the baseline design reduces the LCC in the majority of homes for both gas and electric storage water heaters, and heat pump electric water heaters and condensing gas water heaters provide a lower LCC for homes with large rated volume water heaters.

Lekov, Alex; Franco, Victor; Meyers, Steve; Thompson, Lisa; Letschert, Virginie

2010-11-24T23:59:59.000Z

248

Heat Pump Swimming Pool Heaters | Department of Energy  

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

from the hot gas to the cooler pool water circulating through the heater. The heated water then returns to the pool. The hot gas, as it flows through the condenser coil, returns...

249

FEMP Designated Product Assessment for Commercial Gas Water Heaters  

E-Print Network (OSTI)

boilers is 80%. The maximum standby loss is specified usingrate. 8 There is no maximum standby loss specified for gas-of hot water use, standby losses are not a significant part

Lutz, Jim

2012-01-01T23:59:59.000Z

250

Development and Validation of a Gas-Fired Residential Heat Pump Water Heater - Final Report  

SciTech Connect

For gas-fired residential water heating, the U.S. and Canada is predominantly supplied by minimum efficiency storage water heaters with Energy Factors (EF) in the range of 0.59 to 0.62. Higher efficiency and higher cost ($700 - $2,000) options serve about 15% of the market, but still have EFs below 1.0, ranging from 0.65 to 0.95. To develop a new class of water heating products that exceeds the traditional limit of thermal efficiency, the project team designed and demonstrated a packaged water heater driven by a gas-fired ammonia-water absorption heat pump. This gas-fired heat pump water heater can achieve EFs of 1.3 or higher, at a consumer cost of $2,000 or less. Led by Stone Mountain Technologies Inc. (SMTI), with support from A.O. Smith, the Gas Technology Institute (GTI), and Georgia Tech, the cross-functional team completed research and development tasks including cycle modeling, breadboard evaluation of two cycles and two heat exchanger classes, heat pump/storage tank integration, compact solution pump development, combustion system specification, and evaluation of packaged prototype GHPWHs. The heat pump system extracts low grade heat from the ambient air and produces high grade heat suitable for heating water in a storage tank for domestic use. Product features that include conventional installation practices, standard footprint and reasonable economic payback, position the technology to gain significant market penetration, resulting in a large reduction of energy use and greenhouse gas emissions from domestic hot water production.

Michael Garrabrant; Roger Stout; Paul Glanville; Janice Fitzgerald; Chris Keinath

2013-01-21T23:59:59.000Z

251

High Efficiency R-744 Commercial Heat Pump Water Heaters  

SciTech Connect

The project investigated the development and improvement process of a R744 (CO2) commercial heat pump water heater (HPWH) package of approximately 35 kW. The improvement process covered all main components of the system. More specific the heat exchangers (Internal heat exchanger, Evaporator, Gas cooler) as well as the expansion device and the compressor were investigated. In addition, a comparison to a commercially available baseline R134a unit of the same capacity and footprint was made in order to compare performance as well as package size reduction potential.

Elbel, Dr. Stefan W.; Petersen, Michael

2013-04-25T23:59:59.000Z

252

An Evaluation of the Water Heater Load Potential for Providing Regulation Service  

Science Conference Proceedings (OSTI)

This paper investigates the possibility of providing aggregated regulation services with small loads, such as water heaters or air conditioners. A direct-load control algorithm is presented to aggregate the water heater load for the purpose of regulation. A dual-element electric water heater model is developed, which accounts for both thermal dynamics and users’ water consumptions. A realistic regulation signal was used to evaluate the number of water heaters needed and the operational characteristics of a water heater when providing 2-MW regulation service. Modeling results suggest that approximately 33,333 water heaters are needed to provide a 2-MW regulation service 24 hours a day. However, if water heaters only provide regulation from 6:00 to 24:00, approximately 20,000 will be needed. Because the control algorithm has considered the thermal setting of the water heater, the customer comfort is obstructed little. Therefore, the aggregated regulation service provided by water heater loads can become a major source of revenue for load-service entities when the smart grid enables the direct load control.

Kondoh, Junji; Lu, Ning; Hammerstrom, Donald J.

2011-08-31T23:59:59.000Z

253

Economics of residential gas furnaces and water heaters in United States new construction market  

E-Print Network (OSTI)

Experiences of residential consumers and utilities. OakStar (2008). Energy Star Residential Water Heaters: Finalefficiency improvements for residential gas furnaces in the

Lekov, Alex B.

2010-01-01T23:59:59.000Z

254

Economics of Condensing Gas Furnaces and Water Heaters Potential in Residential Single Family Homes  

E-Print Network (OSTI)

seds.html. USDOE. 2009. Residential Energy ConsumptionUSEPA) 2008. Energy Star Residential Water Heaters: FinalExperiences of residential consumers and utilities. Oak

Lekov, Alex

2011-01-01T23:59:59.000Z

255

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

256

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

257

Gas-Fired Absorption Heat Pump Water Heater Research Project | Department  

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

Emerging Technologies » Gas-Fired Absorption Heat Pump Water Emerging Technologies » Gas-Fired Absorption Heat Pump Water Heater Research Project Gas-Fired Absorption Heat Pump Water Heater Research Project The U.S. Department of Energy (DOE) is currently conducting research into carbon gas-fired absorption heat pump water heaters. This project will employ innovative techniques to increase water heating energy efficiency over conventional gas storage water heaters by 40%. Project Description This project seeks to develop a natural gas-fired water heater using an absorption heat. The development effort is targeting lithium bromide aqueous solutions as a working fluid in order to avoid the negative implications of using more toxic ammonia. Project Partners Research is being undertaken through a Cooperative Research and Development

258

Our Environment in Hot Water: Comparing Water Heaters, A Life...  

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

Group Electricity Markets and Policy Group Energy Efficiency Standards Group Indoor Environment Group International Energy Studies Group Sustainable Energy Systems Group Energy...

259

Hot Showers, Fresh Laundry, Clean Dishes | Department of Energy  

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

Hot Showers, Fresh Laundry, Clean Dishes Hot Showers, Fresh Laundry, Clean Dishes Hot Showers, Fresh Laundry, Clean Dishes March 5, 2013 - 11:17am Addthis The GE GeoSpring™ Electric Heat Pump Water Heater is readily integrated into new and existing home designs. Taking up the same footprint as a traditional 50-gallon tank water heater, the Electric Heat Pump Water Heater uses the existing water heater's plumbing and electrical connections. Credit: GE The GE GeoSpring(tm) Electric Heat Pump Water Heater is readily integrated into new and existing home designs. Taking up the same footprint as a traditional 50-gallon tank water heater, the Electric Heat Pump Water Heater uses the existing water heater's plumbing and electrical connections. Credit: GE To introduce this new electric heat pump water heater, GE ran a memorable ad during the 2010 Winter Olympics featuring snow monkeys enjoying a hot soak. Credit: GE

260

Energy Cost Calculator for Electric and Gas Water Heaters | Department of  

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

Electric and Gas Water Heaters Electric and Gas Water Heaters Energy Cost Calculator for Electric and Gas Water Heaters October 8, 2013 - 2:26pm Addthis Vary equipment size, energy cost, hours of operation, and /or efficiency level. INPUT SECTION Input the following data (if any parameter is missing, calculator will set to default value). Defaults Type of Water Heater Electric Gas Electric Average Daily Usage (gallons per day)* gallons 64* Energy Factor† 0.92 (electric) 0.61 (gas) Energy Cost $ / kWh $0.06 per kWh $.60 per therm Quantity of Water Heaters to be Purchased unit(s) 1 unit * See assumptions for various daily water use totals. † The comparison assumes a storage tank water heater as the input type. To allow demand water heaters as the comparison type, users can specify an input EF of up to 0.85; however, 0.66 is currently the best available EF for storage water heaters.

Note: This page contains sample records for the topic "hot water heater" 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

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...

262

THE EFFECT OF LOCATION OF THE PREDICTED PERFORMANCE OF A HEAT PUMP WATER HEATER  

E-Print Network (OSTI)

of houses with a high perfor- mance heat pump as well as resistance, gas, and oil heated houses with a high#12;THE EFFECT OF LOCATION OF THE PREDICTED PERFORMANCE OF A HEAT PUMP WATER HEATER Laboratory testing and field testing have shown that a heat pump water heater (HPWH) uses about half the electrical

Oak Ridge National Laboratory

263

Demonstration of a heat pump water heater. Volume 3. Design report  

SciTech Connect

Work performed during the pilot run manufacturing and laboratory testing stages of a heat pump water heater for residential installations is described. A general description of the heat pump water heater is provided, as are detailed discussions of individual components. Also included is a description of the pilot run manufacturing facility and experience, laboratory operations, and laboratory test data.

Sloane, B.D.; Krise, R.C.; Kent, D.D.

1979-12-01T23:59:59.000Z

264

Tips: Water Heating | Department of Energy  

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

2, 2012 - 4:53pm Addthis Keep Your Energy Bills Out of Hot Water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more....

265

Heat pump water heater and method of making the same  

DOE Patents (OSTI)

An improved heat pump water heater wherein the condenser assembly of the heat pump is inserted into the water tank through an existing opening in the top of the tank, the assembly comprising a tube-in-a-tube construction with an elongated cylindrical outer body heat exchanger having a closed bottom with the superheated refrigerant that exits the compressor of the heat pump entering the top of the outer body. As the refrigerant condenses along the interior surface of the outer body, the heat from the refrigerant is transferred to the water through the outer body. The refrigerant then enters the bottom of an inner body coaxially disposed within the outer body and exits the top of the inner body into the refrigerant conduit leading into the expansion device of the heat pump. The outer body, in a second embodiment of the invention, acts not only as a heat exchanger but also as the sacrificial anode in the water tank by being constructed of a metal which is more likely to corrode than the metal of the tank.

Mei, Viung C. (Oak Ridge, TN); Tomlinson, John J. (Knoxville, TN); Chen, Fang C. (Knoxville, TN)

2001-01-01T23:59:59.000Z

266

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

267

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

268

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

269

Heat Pump Water Heater Technology: Experiences of Residential Consumers and Utilities  

SciTech Connect

This paper presents a case study of the residential heat pump water heater (HPWH) market. Its principal purpose is to evaluate the extent to which the HPWH will penetrate the residential market sector, given current market trends, producer and consumer attributes, and technical parameters. The report's secondary purpose is to gather background information leading to a generic framework for conducting market analyses of technologies. This framework can be used to compare readiness and to factor attributes of market demand back into product design. This study is a rapid prototype analysis rather than a detailed case analysis. For this reason, primary data collection was limited and reliance on secondary sources was extensive. Despite having met its technical goals and having been on the market for twenty years, the HPWH has had virtually no impact on contributing to the nation's water heating. In some cases, HPWH reliability and quality control are well below market expectations, and early units developed a reputation for unreliability, especially when measured against conventional water heaters. In addition to reliability problems, first costs of HPWH units can be three to five times higher than conventional units. Without a solid, well-managed business plan, most consumers will not be drawn to this product. This is unfortunate. Despite its higher first costs, efficiency of an HPWH is double that of a conventional water heater. The HPWH also offers an attractive payback period of two to five years, depending on hot water usage. On a strict life-cycle basis it supplies hot water very cost effectively. Water heating accounts for 17% of the nation's residential consumption of electricity (see chart at left)--water heating is second only to space heating in total residential energy use. Simple arithmetic suggests that this figure could be reduced to the extent HPWH technology displaces conventional water heating. In addition, the HPWH offers other benefits. Because it produces hot water by extracting heat from the air it tends to dehumidify and cool the room in which it is placed. Moreover, it tends to spread the water heating load across utility non-peak periods. Thus, electric utilities with peak load issues could justify internal programs to promote this technology to residential and commercial customers. For practical purposes, consumers are indifferent to the manner in which water is heated but are very interested in product attributes such as initial first cost, operating cost, performance, serviceability, product size, and installation costs. Thus, the principal drivers for penetrating markets are demonstrating reliability, leveraging the dehumidification attributes of the HPWH, and creating programs that embrace life-cycle cost principles. To supplement this, a product warranty with scrupulous quality control should be implemented; first-price reduction through engineering, perhaps by reducing level of energy efficiency, should be pursued; and niche markets should be courted. The first step toward market penetration is to address the HPWH's performance reliability. Next, the manufacturers could engage select utilities to aggressively market the HPWH. A good approach would be to target distinct segments of the market with the potential for the highest benefits from the technology. Communications media that address performance issues should be developed. When marketing to new home builders, the HPWH could be introduced as part of an energy-efficient package offered as a standard feature by builders of new homes within a community. Conducting focus groups across the United States to gather input on HPWH consumer values will feed useful data back to the manufacturers. ''Renaming'' and ''repackaging'' the HPWH to improve consumer perception, appliance aesthetics, and name recognition should be considered. Once an increased sales volume is achieved, the manufacturers should reinvest in R&D to lower the price of the units. The manufacturers should work with ''do-it-yourself'' (DIY) stores to facilitate introduction of th

Ashdown, BG

2004-08-04T23:59:59.000Z

270

Development of Environmentally Benign Heat Pump Water Heaters for the US Market  

SciTech Connect

Improving energy efficiency in water heating applications is important to the nation's energy strategies. Water heating in residential and commercial buildings accounts for about 10% of U.S. buildings energy consumption. Heat pump water heating (HPWH) technology is a significant breakthrough in energy efficiency, as an alternative to electric resistance water heating. Heat pump technology has shown acceptable payback period with proper incentives and successful market penetration is emerging. However, current HPWH require the use of refrigerants with high Global Warming Potential (GWP). Furthermore, current system designs depend greatly on the backup resistance heaters when the ambient temperature is below freezing or when hot water demand increases. Finally, the performance of current HPWH technology degrades greatly as the water set point temperature exceeds 330 K. This paper presents the potential for carbon dioxide, CO2, as a natural, environmentally benign alternative refrigerant for HPWH technology. In this paper, we first describe the system design, implications and opportunities of operating a transcritical cycle. Next, a prototype CO2 HPWH design featuring flexible component evaluation capability is described. The experimental setup and results are then illustrated followed by a brief discussion on the measured system performance. The paper ends with conclusions and recommendations for the development of CO2 heat pump water heating technology suitable for the U.S. market.

Abdelaziz, Omar [ORNL; Wang, Kai [ORNL; Vineyard, Edward Allan [ORNL; Roetker, Jack [General Electric - Appliance Park

2012-01-01T23:59:59.000Z

271

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

272

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

273

ENERGY STAR Residential Water Heaters to Save Americans Up to $823 Million  

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

STAR Residential Water Heaters to Save Americans Up to $823 STAR Residential Water Heaters to Save Americans Up to $823 Million in the Next Five Years ENERGY STAR Residential Water Heaters to Save Americans Up to $823 Million in the Next Five Years December 31, 2008 - 9:18am Addthis WASHINGTON - The U.S. Department of Energy (DOE) today announced the availability of ENERGY STAR® residential water heaters. With today's announcement, the ENERGY STAR® program now addresses every major residential appliance found in most American homes. Introduction of this product provides significant potential savings to consumers. Water heating represents up to 15.5 percent of national residential energy consumption, the second largest end use of energy in homes, following heating and cooling. Using one of five specified water heating technologies, ENERGY

274

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...

275

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

276

Economics of residential gas furnaces and water heaters in United States new construction market  

SciTech Connect

New single-family home construction represents a significant and important market for the introduction of energy-efficient gas-fired space heating and water-heating equipment. In the new construction market, the choice of furnace and water-heater type is primarily driven by first cost considerations and the availability of power vent and condensing water heaters. Few analysis have been performed to assess the economic impacts of the different combinations of space and water-heating equipment. Thus, equipment is often installed without taking into consideration the potential economic and energy savings of installing space and water-heating equipment combinations. In this study, we use a life-cycle cost analysis that accounts for uncertainty and variability of the analysis inputs to assess the economic benefits of gas furnace and water-heater design combinations. This study accounts not only for the equipment cost but also for the cost of installing, maintaining, repairing, and operating the equipment over its lifetime. Overall, this study, which is focused on US single-family new construction households that install gas furnaces and storage water heaters, finds that installing a condensing or power-vent water heater together with condensing furnace is the most cost-effective option for the majority of these houses. Furthermore, the findings suggest that the new construction residential market could be a target market for the large-scale introduction of a combination of condensing or power-vent water heaters with condensing furnaces.

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2009-05-06T23:59:59.000Z

277

Buildings Energy Data Book: 5.4 Water Heaters  

Buildings Energy Data Book (EERE)

5 5 Water Heater Efficiencies 2005 2010 Efficiency Stock Minimum Best-Available Residential Type Parameter (1) Efficiency New Efficiency New Efficiency Electric Storage EF 0.90 0.90 (2) 0.95 (2) Electric Instantaneous EF 0.82 0.82 0.98 Electric Heat Pump EF 2.00 2.00 2.35 Gas-Fired Storage EF 0.60 0.59 (3) 0.85 (3) Gas-Fired Instantaneous EF 0.82 0.82 0.98 Oil-Fired Storage EF 0.50 0.53 (4) 0.68 (4) Solar SEF 2.50 N.A. 2.50 2007 2010 Efficiency Stock Minimum Best-Available Commercial Type Parameter (1) Efficiency New Efficiency New Efficiency Electric Storage Thermal Efficiency 0.98 0.98 (5) 0.98 (5) Electric Instantaneous Thermal Efficiency 0.98 0.98 0.98 Gas-Fired Storage Thermal Efficiency 0.78 0.80 (6) 0.96 (6) Gas-Fired Instantaneous Thermal Efficiency 0.77 0.80 0.85 Oil-Fired Storage Thermal Efficiency 0.79 0.78 (7) 0.85 (7) Note(s):

278

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

279

Expert Meeting Report: Recommendations for Applying Water Heaters in Combination Space and Domestic Water Heating Systems  

Science Conference Proceedings (OSTI)

The topic of this meeting was 'Recommendations For Applying Water Heaters In Combination Space And Domestic Water Heating Systems.' Presentations and discussions centered on the design, performance, and maintenance of these combination systems, with the goal of developing foundational information toward the development of a Building America Measure Guideline on this topic. The meeting was held at the Westford Regency Hotel, in Westford, Massachusetts on 7/31/2011.

Rudd, A.; Ueno, K.; Bergey, D.; Osser, R.

2012-07-01T23:59:59.000Z

280

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

Note: This page contains sample records for the topic "hot water heater" 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

Economics of Residential Gas Furnaces and Water Heaters in United States  

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

Economics of Residential Gas Furnaces and Water Heaters in United States Economics of Residential Gas Furnaces and Water Heaters in United States New Construction Market Speaker(s): Alex Lekov Gabrielle Wong-Parodi James McMahon Victor Franco Date: May 8, 2009 - 12:00pm Location: 90-3122 In the new single-family home construction market, the choice of what gas furnace and gas water heater combination to install is primarily driven by first cost considerations. In this study, the authors use a life-cycle cost analysis approach that accounts for uncertainty and variability of inputs to assess the economic benefits of installing different gas furnace and water heater combinations. Among other factors, it assesses the economic feasibility of eliminating the traditional metal vents and replacing them with vents made of plastic materials used in condensing and power vent

282

Critical Question #8: When are Heat Pump Water Heaters the Best Solution? |  

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

8: When are Heat Pump Water Heaters the Best 8: When are Heat Pump Water Heaters the Best Solution? Critical Question #8: When are Heat Pump Water Heaters the Best Solution? What do we know about actual performance compared to promised performance? What is the best way to manage the space conditioning impacts on a home? Is there an easy decision tree for deciding if this is the best solution for a particular home (Climate? Utility prices? Accessibility? Physical space constraints? Workforce?)? cq8_residential_hpwh_costs_maguire.pdf cq8_hpwh_performance_colon.pdf cq8_hpwhs_multifamily_weitzel.pdf More Documents & Publications Track A - Energy Systems Innovations Illustrative Calculation of Economics for Heat Pump and "Grid-Enabled" Water Heaters Standing Technical Committee Working Sessions

283

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

284

Energy Savings and Breakeven Cost for Residential Heat Pump Water Heaters in the United States  

SciTech Connect

Heat pump water heaters (HPWHs) have recently reemerged in the U.S. residential water heating market and have the potential to provide homeowners with significant energy savings. However, there are questions as to the actual performance and energy savings potential of these units, in particular in regards to the heat pump's performance in unconditioned space and the impact of the heat pump on space heating and cooling loads when it is located in conditioned space. To help answer these questions, simulations were performed of a HPWH in both conditioned and unconditioned space at over 900 locations across the continental United States and Hawaii. Simulations included a Building America benchmark home so that any interaction between the HPWH and the home's HVAC equipment could be captured. Comparisons were performed to typical gas and electric water heaters to determine the energy savings potential and cost effectiveness of a HPWH relative to these technologies. HPWHs were found to have a significant source energy savings potential when replacing typical electric water heaters, but only saved source energy relative to gas water heater in the most favorable installation locations in the southern US. When replacing an electric water heater, the HPWH is likely to break even in California, the southern US, and parts of the northeast in most situations. However, the HPWH will only break even when replacing a gas water heater in a few southern states.

Maguire, J.; Burch, J.; Merrigan, T.; Ong, S.

2013-07-01T23:59:59.000Z

285

Tennessee Valley Authority/Bristol Tennessee Essential Services Smart Water Heater Pilot  

Science Conference Proceedings (OSTI)

This report describes the results and analysis of electric consumption (demand), demographic, and customer satisfaction data collected from Smart Water Heater Pilot participants in summer 2009. The demand response control and data collection are implemented using Carina Technology Inc.'s Water Heater Information Solution for Energy (WISE) units installed at 117 residential sites within Bristol Tennessee Essential Services’ operating territory. The results from this study provide insight into the data col...

2010-02-03T23:59:59.000Z

286

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

287

Performance analysis of dedicated heat-pump water heaters in an office building  

SciTech Connect

An evaluation is made of the performance of two generic dedicated heat pump water heaters (HPWHs) in supplying the domestic hot water (DHW) needs of a medium-sized office building in Colorado. Results are based on preliminary data measurements, and assumptions are made to compensate for a faulty flow meter. A stand-alone heat pump plumbed to a conventional tank obtains a coefficient of performance (COP) of 2.4 but only delivers load water temperatures of about 41/sup 0/C (105/sup 0/F) because of the 15,142 L/day (4000 gal/day) recirculating loop flow. An industrial-grade stand-alone HPWH will replace this unit. An integral heat pump/tank unit is being tested, but results are not available because of compressor starting problems. Recirculating loop losses account for 75% of the energy delivered by the HPWHs. These losses could be reduced by 75% if the recirculating loop were insulated, thus reducing the DHW fuel costs by 50%. The insulation expense could be paid in less than 3 years by savings in DHW fuel costs.

Morrison, L.

1981-05-01T23:59:59.000Z

288

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

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

Innovation Science & Technology Science Education Innovation Energy Sources Energy Usage Energy Efficiency Mission News & Blog Maps Data About Us For Staff & Contractors Offices...

289

Field Monitoring of a Geothermal Heat Pump Water Heater: Unicoi County High School, Erwin, Tennessee  

Science Conference Proceedings (OSTI)

A geothermal heat pump water heater (HPWH) system -- installed to preheat water entering a 250-gallon gas-fired water heater (GWH) at a Tennessee high school -- reduced water-heating costs by 34 percent per year, compared to the base case GWH system. This report provides results from field monitoring of the geothermal HPWH system, tested in three distinct operating modes for five months. The program goal was to assess the energy and economic benefits of the GWH system with and without the geothermal HPWH...

2003-10-15T23:59:59.000Z

290

Regional Variation in Residential Heat Pump Water Heater Performance in the United States  

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

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Regional Variation in Residential Heat Pump Water Heater Performance in the US Jeff Maguire 4/30/13 Outline * Why HPWHs? * US Water Heating Market * Overview of HPWHs * Model Description * Results o HPWH Performance o Energy Savings Potential o Breakeven Cost 2 Heat Pump Water Heaters Save $300 a year over standard electric? Save $100 a year over standard gas? Heat Pump Electric Gas 3 Questions about HPWHs * Are HPWHs a good replacement for typical gas and electric storage water heaters? o In different locations across the country? o In conditioned/unconditioned space? o Source energy savings?

291

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

292

The Newest Addition to the ENERGY STAR Lineup: Water Heaters | Department  

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

The Newest Addition to the ENERGY STAR Lineup: Water Heaters The Newest Addition to the ENERGY STAR Lineup: Water Heaters The Newest Addition to the ENERGY STAR Lineup: Water Heaters February 17, 2009 - 9:48am Addthis Elizabeth Spencer Communicator, National Renewable Energy Laboratory If you've gone shopping for new appliances sometime in the last decade, then you're probably familiar with the ENERGY STAR® label. ENERGY STAR is a partnership between the U.S. Department of Energy and the U.S. Environmental Protection Agency that sets higher-than-average standards for household appliances, electronics, and commercial products. Products that meet these rigorous energy requirements can be designated as ENERGY STAR products. For the average consumer, it basically means that ENERGY STAR products are more energy efficient than their standard counterparts, and therefore will

293

Performance Evaluation of Combined Batch Type Solar Water Heater Cum Regenerative Solar Still  

Science Conference Proceedings (OSTI)

In this work, effort is being made to integrate two different solar appliances so that they could work in much better way. Solar water heater cum distillation system is designed and fabricated to carry out two operations simultaneously, heating of water ...

A. Sumit Ambade; B. Tarun Narekar; C. Vikrant Katekar

2009-12-01T23:59:59.000Z

294

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

295

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 ...

296

Water Heating Basics | Department of Energy  

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

Heaters Solar Water Heaters Tankless Coil and Indirect Water Heaters Addthis Related Articles Tankless Demand Water Heater Basics Solar Water Heater Basics Heat Pump Water Heater...

297

Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 3, Water heaters, pool heaters, direct heating equipment, and mobile home furnaces  

SciTech Connect

This is Volume 3 in a series of documents on energy efficiency of consumer products. This volume discusses energy efficiency of water heaters. Water heaters are defined by NAECA as products that utilize oil, gas, or electricity to heat potable water for use outside the heater upon demand. These are major appliances, which use a large portion (18% on average) of total energy consumed per household (1). They differ from most other appliances in that they are usually installed in obscure locations as part of the plumbing and are ignored until they fail. Residential water heaters are capable of heating water up to 180{degrees}F, although the setpoints are usually set lower.

Not Available

1993-11-01T23:59:59.000Z

298

Energy Basics: Water Heating  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Storage Water Heaters Tankless Demand Water Heaters Heat Pump Water Heaters Solar Water Heaters Tankless Coil & Indirect Water Heaters Water Heating A variety of...

299

Performance of Heat Pump Water Heaters: Initial Findings of Draw Profile Effect on HPWH Efficiency  

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

Performance of Heat Pump Water Heaters Performance of Heat Pump Water Heaters © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved. Evaluation Overview  2000-2002 Evaluated 20 installations with CL&P  Product had problems; not ready for prime time (average COPs of 1.67 was not the problem)  New batch of heaters available, including:  GE's GeoSpring Hybrid (50 gal)  A.O.Smith's Voltex Hybrid (60 & 80 gal)  Stiebel-Eltron's Accelera 300 (80 gal)  Evaluating 14 installations for National Grid, NSTAR, & Cape Light Compact. © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved.

300

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

Note: This page contains sample records for the topic "hot water heater" 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

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...

302

Economics of Condensing Gas Furnaces and Water Heaters Potential in Residential Single Family Homes  

SciTech Connect

Residential space and water heating accounts for over 90percent of total residential primary gas consumption in the United States. Condensing space and water heating equipment are 10-30percent more energy-efficient than conventional space and water heating. Currently, condensing gas furnaces represent 40 percent of shipments and are common in the Northern U.S. market. Meanwhile, manufacturers are planning to develop condensing gas storage water heaters to qualify for Energy Star? certification. Consumers, installers, and builders who make decisions about installing space and water heating equipment generally do not perform an analysis to assess the economic impacts of different combinations and efficiencies of space and water heating equipment. Thus, equipment is often installed without taking into consideration the potential life-cycle economic and energy savings of installing space and water heating equipment combinations. Drawing on previous and current analysis conducted for the United States Department of Energy rulemaking on amended standards for furnaces and water heaters, this paper evaluates the extent to which condensing equipment can provide life-cycle cost-effectiveness in a representative sample of single family American homes. The economic analyses indicate that significant energy savings and consumer benefits may result from large-scale introduction of condensing water heaters combined with condensing furnaces in U.S. residential single-family housing, particularly in the Northern region. The analyses also shows that important benefits may be overlooked when policy analysts evaluate the impact of space and water heating equipment separately.

Lekov, Alex; Franco, Victor; Meyers, Steve

2010-05-14T23:59:59.000Z

303

Laboratory and Field Evaluation of Four Heat Pump Water Heater Systems  

Science Conference Proceedings (OSTI)

Water heating represents the second-largest load in residential buildings in the United States, and also a large load in many commercial and industrial buildings. The Electric Power Research Institute (EPRI) continues research on heat pump water heater (HPWH) systems, which provide high-efficiency electric water heating using the heat pump cycle. In this study, four systems, representing both residential and commercial applications, were tested in the laboratory and/or in the field. An A.O. Smith ...

2012-12-14T23:59:59.000Z

304

Capstone C60 Microturbine as a Water Heater and Standby Generator: Installation at Tomoka Correctional Institution  

Science Conference Proceedings (OSTI)

A Capstone C60 microturbine and matched Unifin heat recovery heat exchanger were installed as a water heater in the laundry of the Tomoka Correctional Institution in Daytona, Florida. This report chronicles the design, installation, and early operations of the project.

2005-03-29T23:59:59.000Z

305

Development of High Efficiency Carbon Dioxide Commercial Heat Pump Water Heater  

Science Conference Proceedings (OSTI)

Although heat pump water heaters are today widely accepted in both Japan and Europe, where energy costs are high and government incentives for their use exist, acceptance of such products in the US has been limited. While this trend is slowly changing with the introduction of heat pump water heaters into the residential market, but acceptance remains low in the commercial sector. The objective of the presented work is the development of a high efficiency R744 heat pump water heater for commercial applications with effective utilization of the cooling capability for air conditioning and/or refrigeration. The ultimate goal is to achieve total system COP of up to 8. This unit will be targeted at commercial use where some cooling load is typically needed year round, such as restaurants, hotels, nursing homes, and hospitals. This paper presents the performance results from the development of four R744 commercial heat pump water heater packages of approximately 35 kW and comparison to a commercially available baseline R134a unit of the same capacity and footprint. In addition, the influences of an internal heat exchanger and an enhanced evaporator on the system performance are described and recommendations are made for further improvements of the R744 system.

Michael PETERSEN; Chad D. BOWERS; Stefan ELBEL; Pega HRNJAK

2012-07-01T23:59:59.000Z

306

Energy Basics: Water Heating  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

about: Conventional Storage Water Heaters Demand (Tankless or Instantaneous) Water Heaters Heat Pump Water Heaters Solar Water Heaters Tankless Coil and Indirect Water Heaters...

307

WATER INFLOW INTO BOREHOLES DURING THE STRIPA HEATER EXPERIMENTS  

E-Print Network (OSTI)

mm holes (9 of 18) produced water only sporadically Inflowperiod. Because H8 had produced no water for a year, no dataexperiment? have produced an increase in water inflow in

Nelson, P.H.

2010-01-01T23:59:59.000Z

308

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...

309

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...

310

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...

311

Expert Meeting Report: Recommendations for Applying Water Heaters in Combination Space and Domestic Water Heating Systems  

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

Recommendations for Applying Recommendations for Applying Water Heaters in Combination Space and Domestic Water Heating Systems A. Rudd, K. Ueno, D. Bergey, R. Osser Building Science Corporation June 2012 i This report received minimal editorial review at NREL. NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, subcontractors, or affiliated partners makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark,

312

Heat Pump Swimming Pool Heaters | Department of Energy  

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

Swimming Pool Heaters Swimming Pool Heaters Heat Pump Swimming Pool Heaters May 29, 2012 - 1:49pm Addthis How a heat pump works. How a heat pump works. How They Work Heat pumps use electricity to capture heat and move it from one place to another. They don't generate heat. As the pool pump circulates the swimming pool's water, the water drawn from the pool passes through a filter and the heat pump heater. The heat pump heater has a fan that draws in the outside air and directs it over the evaporator coil. Liquid refrigerant within the evaporator coil absorbs the heat from the outside air and becomes a gas. The warm gas in the coil then passes through the compressor. The compressor increases the heat, creating a very hot gas that then passes through the condenser. The condenser transfers the heat from the hot gas to the cooler pool water circulating

313

Field Performance of Heat Pump Water Heaters in the Northeast, Massachusetts and Rhode Island (Fact Sheet)  

SciTech Connect

Heat pump water heaters (HPWHs) are finally entering the mainstream residential water heater market. Potential catalysts are increased consumer demand for higher energy efficiency electric water heating and a new Federal water heating standard that effectively mandates use of HPWHs for electric storage water heaters with nominal capacities greater than 55 gallons. When compared to electric resistance water heating, the energy and cost savings potential of HPWHs is tremendous. Converting all electric resistance water heaters to HPWHs could save American consumers 7.8 billion dollars annually ($182 per household) in water heating operating costs and cut annual residential source energy consumption for water heating by 0.70 quads. Steven Winter Associates, Inc. embarked on one of the first in situ studies of these newly released HPWH products through a partnership with two sponsoring electric utility companies, National Grid and NSTAR, and one sponsoring energy efficiency service program administrator, Cape Light Compact. Recent laboratory studies have measured performance of HPWHs under various operating conditions, but publicly available field studies have not been as available. This evaluation attempts to provide publicly available field data on new HPWHs by monitoring the performance of three recently released products (General Electric GeoSpring, A.O. Smith Voltex, and Stiebel Eltron Accelera 300). Fourteen HPWHs were installed in Massachusetts and Rhode Island and monitored for over a year. Of the 14 units, ten were General Electric models (50 gallon units), two were Stiebel Eltron models (80 gallon units), and two were A.O. Smith models (one 60-gallon and one 80-gallon unit).

Not Available

2013-12-01T23:59:59.000Z

314

Blue Ridge Mountain Electric Membership Corporation - Water Heater...  

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

Heating & Cooling Cooling Construction Design & Remodeling Ventilation Manufacturing Heat Pumps Appliances & Electronics Water Heating Program Information Georgia Program Type...

315

Tips: Water Heating | Department of Energy  

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

Tips: Water Heating Tips: Water Heating Tips: Water Heating May 2, 2012 - 4:53pm Addthis Keep Your Energy Bills Out of Hot Water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more. Keep Your Energy Bills Out of Hot Water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more. Water heating is the second largest energy expense in your home. It typically accounts for about 18% of your utility bill. There are four ways to cut your water heating bills: use less hot water, turn down the thermostat on your water heater, insulate your water heater, or buy a new, more efficient model. Water Heating Tips Install aerating, low-flow faucets and showerheads. Repair leaky faucets promptly; a leaky faucet wastes gallons of

316

Tips: Water Heating | Department of Energy  

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

Water Heating Water Heating Tips: Water Heating May 2, 2012 - 4:53pm Addthis Keep Your Energy Bills Out of Hot Water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more. Keep Your Energy Bills Out of Hot Water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more. Water heating is the second largest energy expense in your home. It typically accounts for about 18% of your utility bill. There are four ways to cut your water heating bills: use less hot water, turn down the thermostat on your water heater, insulate your water heater, or buy a new, more efficient model. Water Heating Tips Install aerating, low-flow faucets and showerheads. Repair leaky faucets promptly; a leaky faucet wastes gallons of

317

Solar Buildings: Solar Water Heaters, The Next Generation  

DOE Green Energy (OSTI)

This document explains the U.S. Department of Energy's Solar Buildings Program's efforts regarding the research, development, and deployment of solar water heating technology.

NREL

1998-10-29T23:59:59.000Z

318

Orlando Utilities Commission- Residential Solar Water Heater Rebate Program (Florida)  

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

The Orlando Utilities Commission (OUC) offers residential electric customers a point-of-sale rebate of $1,000 for new solar water heating systems.

319

Energy Basics: Tankless Coil and Indirect Water Heaters  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

to heat a fluid that's circulated through a heat exchanger in the storage tank. The energy stored by the water tank allows the furnace to turn off and on less often, which saves...

320

Solar Water Heater Rebate Program (Kentucky) | 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...

Note: This page contains sample records for the topic "hot water heater" 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

Columbia River PUD - Water Heater Financing Program (Oregon)...  

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...

322

Columbia River PUD - Water Heater Rebate Program (Oregon) | Open...  

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...

323

EPUD - Solar Water Heater Loan (Oregon) | 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...

324

EPUD - Solar Water Heater Rebate (Oregon) | 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...

325

The effect of location on the predicted performance of a heat pump water heater  

Science Conference Proceedings (OSTI)

Laboratory testing and field testing have shown that a heat pump water heater (HPWH) uses about half the electrical energy input that an electric resistance water heater does. However, since the HPWH extracts energy from the air in its environment, the question arises as to how this energy extraction would affect the house heating, ventilating, and air-conditioning (HVAC) system if the HPWH were located in a conditioned space of a household. A second question concerns the savings obtained by locating the HPWH in an unconditioned space such as a garage or basement. The effect of locating the HPWH in the conditioned spaces of houses with a high-performance heat pump as well as resistance- gas- and oil-heated houses with a high performance electric air conditioner was studied. All calculations were made on a desktop computer. Weather bin data and inlet water temperatures for each city were used to calcuate the energy consumption for the house first with a resistance water heater, and then with a HPWH. The difference between these values was used to calculate the performance factor (PF) of the HPWH. The HPWH will add to the house heating load in winter and lessen the house cooling load in summer.

Levins, W.P.

1982-01-01T23:59:59.000Z

326

Water | Department of Energy  

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

daylighting, passive solar and active solar. They also have an 80 gallon solar hot water heater. | Photo by Dennis Schroeder, National Renewable Energy Laboratory. A guide to...

327

Application of a Linear Input/Output Model to Tankless Water Heaters  

DOE Green Energy (OSTI)

In this study, the applicability of a linear input/output model to gas-fired, tankless water heaters has been evaluated. This simple model assumes that the relationship between input and output, averaged over both active draw and idle periods, is linear. This approach is being applied to boilers in other studies and offers the potential to make a small number of simple measurements to obtain the model parameters. These parameters can then be used to predict performance under complex load patterns. Both condensing and non-condensing water heaters have been tested under a very wide range of load conditions. It is shown that this approach can be used to reproduce performance metrics, such as the energy factor, and can be used to evaluate the impacts of alternative draw patterns and conditions.

Butcher T.; Schoenbauer, B.

2011-12-31T23:59:59.000Z

328

Heat Pump Water Heater Technology Assessment Based on Laboratory Research and Energy Simulation Models: Preprint  

SciTech Connect

This paper explores the laboratory performance of five integrated Heat Pump Water Heaters (HPWHs) across a wide range of operating conditions representative of US climate regions. Laboratory results demonstrate the efficiency of this technology under most of the conditions tested and show that differences in control schemes and design features impact the performance of the individual units. These results were used to understand current model limitations, and then to bracket the energy savings potential for HPWH technology in various US climate regions. Simulation results show that HPWHs are expected to provide significant energy savings in many climate zones when compared to other types of water heaters (up to 64%, including impact on HVAC systems).

Hudon, K.; Sparn, B.; Christensen, D.; Maguire, J.

2012-02-01T23:59:59.000Z

329

Water-Heating Dehumidifier - Energy Innovation Portal  

Hydrogen and Fuel Cell; Hydropower, Wave and Tidal; Industrial Technologies; Solar ... When the tank of water heater is full of hot water or a ...

330

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

E-Print Network (OSTI)

7] U.S. Environmental Protection Agency. eGRID. [Online]cleanenergy/energy-resources/egrid/index.html [Accessed:obtained from the U.S. EPA eGrid database [7]. Life-cycle

Lu, Alison

2011-01-01T23:59:59.000Z

331

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

E-Print Network (OSTI)

13] Rheem, “Rheem Manufacturing Company Historical Timewww.ashraemadison.org/company_histories/rheem_history.pdf [

Lu, Alison

2011-01-01T23:59:59.000Z

332

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

E-Print Network (OSTI)

specific mix of fuels used in generating electricity in weredifferent fuel mixes when generating electricity. The datareasons. First, fuel mixes for generating electricity differ

Lu, Alison

2011-01-01T23:59:59.000Z

333

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...

334

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...

335

Performance Assessment of an Eco-Cute Heat Pump Water Heater  

Science Conference Proceedings (OSTI)

This report describes and documents construction, performance, and application of a heat pump water heater (HPWH) that uses carbon dioxide (CO2) as the refrigerant. The term “Eco-cute” refers to carbon dioxide-based heat pump technology jointly developed by Tokyo Electric Power Company (TEPCO), Denso Corporation, and Central Research Institute of Electric Power Industry (CRIEPI). The system received and tested by EPRI is manufactured by Daikin Industries Ltd., located in Osaka, Japan. Use of CO2 as a ref...

2008-12-08T23:59:59.000Z

336

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

337

Study Design And Realization Of Solar Water Heater  

Science Conference Proceedings (OSTI)

Solar is one of the most easily exploitable energy, it is moreover inexhaustible. His applications are many and are varied. The heating of the domestic water is one of the most immediate, simplest and also of most widespread exploitation of the solar energy. Algeria, from its geographical situation, it deposits one of the largest high sun surface expositions in the world. The exposition duration of the almost territory exceeds 2000 hours annually and can reach the 3900 hours (high plateaus and Sahara). By knowing the daily energy received by 1 m{sup 2} of a horizontal surface of the solar thermal panel is nearly around 1700 KWh/m{sup 2} a year in the north and 2263 KWh/m{sup 2} a year in the south of the country, we release the most important and strategic place of the solar technologies in the present and in the future for Algeria. This work consists to study, conceive and manufacture solar water heating with the available local materials so, this type of the energy will be profitable for all, particularly the poor countries. If we consider the illumination duration of the panel around 6 hours a day, the water heat panel manufactured in our laboratory produce an equivalent energy of 11.615 KWh a day so, 4239 KWh a year. These values of energy can be easily increased with performing the panel manufacture.

Lounis, M. [LAAR Laboratory-Physics Department-USTOMB 31000 Oran (Algeria); Boudjemaa, F.; Akil, S. Kouider [Genie Climatic Department-CUKM 44000-Khemis Miliana (Algeria)

2011-01-17T23:59:59.000Z

338

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

339

Development of a Low Cost Heat Pump Water Heater - Second Prototype  

SciTech Connect

Since the 1980s various attempts have been made to apply the efficiency of heat pumps to water heating. The products generated in the 80s and 90s were not successful, due in part to a lack of reliability and difficulties with installation and servicing. At the turn of the century, EnvironMaster International (EMI) produced a heat pump water heater (HPWH) based on a design developed by Arthur D. Little (ADL), with subsequent developmental assistance from Oak Ridge National Laboratory (ORNL) and ADL. This design was a drop-in replacement for conventional electric water heaters. In field and durability testing conducted by ORNL, it proved to be reliable and saved on average more than 50% of the energy used by the best conventional electric water heater. However, the retail price set by EMI was very high, and it failed in the market. ORNL was tasked to examine commercially available HPWH product technology and manufacturing processes for cost saving opportunities. Several cost saving opportunities were found. To verify the feasibility of these cost saving measures, ORNL completed a conceptual design for an HPWH based on an immersed condenser coil that could be directly inserted into a standard water tank through a sleeve affixed to one of the standard penetrations at the top of the tank. After some experimentation, a prototype unit was built with a double-wall coil inserted into the tank. When tested it achieved an energy factor (EF) of 2.12 to 2.2 using DOE-specified test procedures. A.O. Smith contacted ORNL in May 2006 expressing their interest in the ORNL design. The prototype unit was shipped to A.O. Smith to be tested in their laboratory. After they completed their test, ORNL analyzed the raw test data provided by A.O. Smith and calculated the EF to be approximately 1.92. The electric resistance heating elements of a conventional electric water heater are typically retained in a heat pump water heater to provide auxiliary heating capacity in periods of high demand. A.O. Smith informed us that when they applied electric resistance backup heating, using the criterion that resistance heat would be applied whenever the upper thermostat saw water temperatures below the heater s nominal setpoint of 135oF, they found that the EF dropped to approximately 1.5. This is an extremely conservative criterion for backup resistance heating. In a field test of the previously mentioned EMI heat pump water heater, residential consumers found satisfactory performance when the criterion for use of electric resistance backup heating was the upper temperature dropping below the set point minus 27 degrees. Applying this less conservative criterion to the raw data from the original A.O. Smith EF tests indicates that electric resistance heating would never have come on during the test, and thus the EF would have remained in the vicinity of 1.9. A.O. Smith expressed concern about having an EF below 2, as that value triggers certain tax advantages and would assist in their marketing of the product. We believe that insertion of additional length of tubing plus a less conservative set point for electric resistance backup heating would remedy this concern. However, as of this writing, A.O. Smith has not decided to proceed with a commercial product.

Mei, V. C. [Oak Ridge National Laboratory (Retired); Craddick, William G [ORNL

2007-09-01T23:59:59.000Z

340

MEAN MONTHLY PERFORMANCE OF PASSIVE SOLAR HEATERS  

E-Print Network (OSTI)

PERFORMANCE OF PASSIVE SOLAR WATER HEATERS W. Place, M.PERFORMANCE OF PASSIVE SOLAR WATER HEATERS* We Place, M.The Performance of Solar Water Heaters with Natu)""al

Place, W.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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

Dampers for Natural Draft Heaters: Technical Report  

E-Print Network (OSTI)

vented natural-draft gas-fired storage water heater. Thevented natural?draft gas?fired storage water heater. Thevented natural?draft gas?fired storage water heater. The

Lutz, James D.

2009-01-01T23:59:59.000Z

342

Revisions to the SRCC Rating Process for Solar Water Heaters: Preprint  

DOE Green Energy (OSTI)

In the United States, annual performance ratings for solar water heaters are computed with component-based simulation models driven by typical meteorological year weather and specified water draw. Changes in the process are being implemented to enhance credibility through increased transparency and accuracy. Changes to the process include using a graphical rather than text-based model-building tool, performing analytical tests on all components and systems, checking energy balances on every component, loop, and system at every time step, comparing the results to detect outliers and potential errors, and documenting the modeling process in detail. Examples of changes in ratings are shown, along with analytical and comparative testing results.

Burch, J.; Huggins, J.; Long, S.; Thornton, J.

2012-06-01T23:59:59.000Z

343

Control system for electric water heater with heat pump external heat source  

Science Conference Proceedings (OSTI)

A control system for an electric water heater operatively associated with an external heat source, such as a heat pump. The water heater includes a water storage tank provided with an electric tank heating unit having a tank thermostat which closes in response to water temperature in the tank, allowing a flow of current through the tank heating unit so as to turn it on to heat the water, and which opens when the tank thermostat has been satisfied, interrupting the current flow so as to turn the tank heating unit off. The control system as responsive to the initial current surge through the tank heating unit when the tank thermostat closes to interrupt the current flow to the tank heating unit so as to maintain the heating unit off and to turn on the external heat source and maintain it on until the tank thermostat opens. The initial current surge cleans the contacts of the tank thermostat by burning off any insulating oxide residues which may have formed on them. The control system includes means responsive to abnormal conditions which would prevent the external heat source from heating water effectively for turning off the external heat source and turning on the tank heating unit and maintaining the external heat source off and the tank heating unit on until the tank thermostat is satisfied.

Shaffer Jr., J. E.; Picarello, J. F.

1985-09-10T23:59:59.000Z

344

The impact of water flow configuration on crystallisation in LiBr/H2O absorption water heater  

SciTech Connect

Lithium Bromide (LiBr) strong solution entering the absorber tends to crystallise when the absorber temperature is increased for a fixed evaporating pressure. This is considered the key technical barrier for the development of a LiBr absorption heat pump water heater. There are several approaches to avoid the crystallisation problem, such as chemical crystallisation inhibitors, heat and mass transfer enhancement and thermodynamic cycle modification. This paper investigates and compares two flow configurations of LiBr absorption heat pump water heater to evaluate the allowable operating conditions for each. The simulation results indicated that introducing the process water through the absorber first results in lower absorber temperature and hence less tendency for crystallisation.

Wang, Kai [ORNL; Abdelaziz, Omar [ORNL; Vineyard, Edward Allan [ORNL

2011-03-01T23:59:59.000Z

345

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

346

Analysis of the performance and space-conditioning impacts of dedicated heat-pump water heaters  

SciTech Connect

A description is given of the development and testing of the newly-marketed dedicated heat pump water heater (HPWH), and an analysis is presented of its performance and space conditioning impacts. This system utilizes an air-to-water heat pump, costs about $1000 installed, and obtains a coefficient of performance (COP) of about 2.0 in laboratory and field tests. Since a HPWH is usually installed indoors and extracts heat from the air, its operation is a space conditioning benefit if an air conditioning load exists and a penalty if a space heating load exists. To investigate HPWH performance and a space conditioning impacts, a simulation has been developed to model the thermal performance of a residence with resistance baseboard heat, air conditioning, and either heat pump or resistance water heating. The building characteristics are adapted for three US geographical areas (Madison, Wisconsin; Washington, DC; and Ft. Worth, Texas), and the system is simulated for a year with typical weather data. For each city, HPWH COPs are calculated monthly and yearly. In addition, the water heating and space conditioning energy requirements of HPWH operation are compared with those of resistance water heater operation to determine the relative performance ratio (RPR) of the HPWH. The annual simulated RPRs range from 1.5 to 1.7, which indicate a substantial space heating penalty of HPWH operation in these cities.

Morrison, L.; Swisher, J.

1980-12-01T23:59:59.000Z

347

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

348

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

349

Microsoft Word - ASHRAE_Water Heater Paper_2010-11-24_Final_LBNL_.docx  

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

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers Presented at: 2011 ASHRAE Winter Conference, Las Vegas, Nevada January 2011 Alex B. Lekov, Victor H. Franco, Steve Meyers, Lisa Thompson, and Virginie Letschert Lawrence Berkeley National Laboratory Environmental Energy Technologies Division One Cyclotron Road Berkeley, CA 94720 This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State, and Community Programs, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY 2 Disclaimer This document was prepared as an account of work sponsored by the United States

350

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

351

Water Heating | Department of Energy  

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

Water Heating Water Heating Water Heating Infographic: Water Heaters 101 Everything you need to know about saving money on water heating costs Read more Selecting a New Water Heater Tankless? Storage? Solar? Save money on your water heating bill by choosing the right type of energy-efficient water heater for your needs. Read more Sizing a New Water Heater When buying a new water heater, bigger is not always better. Learn how to buy the right size of water heater. Read more You can reduce your monthly water heating bills by selecting the appropriate water heater for your home or pool and by using some energy-efficient water heating strategies. Some simple do-it-yourself projects, like insulating hot water pipes and lowering your water heating temperature, can also help you save money and energy on your water heating.

352

Using prospect theory to create persuasive communications about solar water heaters and energy conservation  

SciTech Connect

Based on predictions advanced by Kahneman and Tversky in their prospect theory, a research plan was developed comparing the effectiveness of cost-benefit presentations which a) were framed in terms of savings or loss, and b) provided isolated or integrated information about tax credit and retail price, about c) either solar water heaters or insulating blankets. After hearing one of the versions of the cost-benefit information, 175 homeowners evaluated the worth and desirability of either solar water heaters or insulating blankets and indicated the likelihood of installing the retrofit within the coming year. Results indicate that, in general, homeowners will find energy-efficient technology more attractive if they are given price information that incorporates the money-saving benefits of tax credits directly into the statement of cost, and which encourages consideration of the money-losing consequences of nonaction. This effect is limited to some extent, however, by how expensive and controversial the time was, and by the individual's prior attitudes toward alternative energy and conservation. When the cost of the device is very high (and the device, itself, controversial), and the homeowner is skeptical about the value of conservation and alternative energy sources, a hard-sell pitch, utilizing the loss-integrated presentation, appears to elicit a strong reactance effect.

Yates, S.M.

1982-01-01T23:59:59.000Z

353

Variability in energy factor test results for residential electric water heaters  

SciTech Connect

Recent modifications to the minimum energy efficiency requirements for residential water heaters have spurred an investigation into the variability in testing high-efficiency electric water heaters. While initial inter-laboratory comparisons showed excellent agreement between test results from different labs, subsequent inter-laboratory comparisons show differences between measured energy factors of up to 0.040. To determine the source of these differences, analyses of various parts of the test procedure are performed. For one case studied, the uncertainty in test results can be as high as +-0.028 if instrument accuracies reach the minimum level allowed in the test procedure. Other areas of the test procedure where variability is introduced are the optional use of pre-draws, the location of the lower tank temperature-measuring device, the use of insulation on tank fittings, and the use of a warm-up period before the simulated-use test commences. The implications of these issues on test results are provided.

Healy, William; Lutz, James D.; Lekov, Alex

2003-04-25T23:59:59.000Z

354

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

355

Assessing Consumer Values and the Supply-Chain Market for the Integrated Water Heater/Dehumidifier  

SciTech Connect

This paper presents a case study of the potential market for the dual-service residential integrated water heater/dehumidifier (WHD). Its principal purpose is to evaluate the extent to which this integrated appliance might penetrate the residential market sector, given current market trends, producer and consumer attributes, and technical parameters. The report's secondary purpose is to gather background information leading to a generic framework for conducting market analyses of technologies. This framework can be used to assess market readiness as well as factor preferred product attributes into the design to drive consumer demand for this product. This study also supports analysis for prototype design. A full market analysis for potential commercialization should be conducted after prototype development. The integrated WHD is essentially a heat-pump water heater (HPWH) with components and controls that allow dedicated dehumidification. Adequate residential humidity control is a growing issue for newly constructed residential homes, which are insulated so well that mechanical ventilation may be necessary to meet fresh air requirements. Leveraging its successful experience with the energy-efficient design improvement for the residential HPWH, the Oak Ridge National Laboratory's (ORNL's) Engineering Science and Technology Division's (ESTD's) Building Equipment Group designed a water-heating appliance that combines HPWH efficiency with dedicated dehumidification. This integrated appliance could be a low-cost solution for dehumidification and efficient electric water heating. ORNL is partnering with Western Carolina University, Asheville-Buncombe Technical Community College, American Carolina Stamping Company, and Clemson University to develop this appliance and assess its market potential. For practical purposes, consumers are indifferent to how water is heated but are very interested in product attributes such as initial first cost, operating cost, performance, serviceability, product size, and installation costs. The principal drivers for penetrating markets are demonstrating reliability, leveraging the dehumidification attributes of the integrated WHD, and creating programs that embrace first-cost and life-cycle cost principles.

Ashdown, BG

2005-01-11T23:59:59.000Z

356

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

357

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

358

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

359

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

360

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

Note: This page contains sample records for the topic "hot water heater" 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

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

362

In-situ tuff water migration/heater experiment: experimental plan  

Science Conference Proceedings (OSTI)

Tuffs on the Nevada Test Site (NTS) are currently under investigation as a potential isolation medium for heat-producing nuclear wastes. The National Academy of Sciences has concurred in our identification of the potentially large water content ({le}40 vol %) of tuffs as one of the important issues affecting their suitability for a repository. This Experimental Plan describes an in-situ experiment intended as an initial assessment of water generation/migration in response to a thermal input. The experiment will be conducted in the Grouse Canyon Welded Tuff in Tunnel U12g (G-Tunnel) located in the north-central region of the NTS. While the Grouse Canyon Welded Tuff is not a potential repository medium, it has physical, thermal, and mechanical properties very similar to those tuffs currently under consideration and is accessible at depth (400 m below the surface) in an existing facility. Other goals of the experiment are to support computer-code and instrumentation development, and to measure in-situ thermal properties. The experimental array consists of a central electrical heater, 1.2 m long x 10.2 cm diameter, surrounded by three holes for measuring water-migration behavior, two holes for measuring temperature profiles, one hole for measuring thermally induced stress in the rock, and one hole perpendicular to the heater to measure displacement with a laser. This Experimental Plan describes the experimental objectives, the technical issues, the site, the experimental array, thermal and thermomechanical modeling results, the instrumentation, the data-acquisition system, posttest characterization, and the organizational details.

Johnstone, J.K.

1980-08-01T23:59:59.000Z

363

National Solar Water Heater Workshop Present at DOE Region V meeting for managers of State Energy Extension Service and State Energy Conservation Plan, March 18-19, 1981  

DOE Green Energy (OSTI)

After a brief description of the National Solar Water Heater Workshop and some comments by users of the solar water heater, the hardware supplier handbook is presented. The performance expected of a hardware supplier is described, solar system components and their specifications are listed, and information is provided to assist the hardware supplier in obtaining necessary materials. (LEW)

Mumma, S.A.; Marinello, M.G.

1981-01-01T23:59:59.000Z

364

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

365

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

366

NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S. climate zones.  

E-Print Network (OSTI)

NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S in the U.S. market--to evaluate the cost of saved energy as a function of climate. The performance of HPWHs laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated

367

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

368

Assessing Consumer Values and the Supply-Chain Market for the Integrated Water Heater/Dehumidifier  

SciTech Connect

This paper presents a case study of the potential market for the dual-service residential integrated water heater/dehumidifier (WHD). Its principal purpose is to evaluate the extent to which this integrated appliance might penetrate the residential market sector, given current market trends, producer and consumer attributes, and technical parameters. The report's secondary purpose is to gather background information leading to a generic framework for conducting market analyses of technologies. This framework can be used to assess market readiness as well as factor preferred product attributes into the design to drive consumer demand for this product. This study also supports analysis for prototype design. A full market analysis for potential commercialization should be conducted after prototype development. The integrated WHD is essentially a heat-pump water heater (HPWH) with components and controls that allow dedicated dehumidification. Adequate residential humidity control is a growing issue for newly constructed residential homes, which are insulated so well that mechanical ventilation may be necessary to meet fresh air requirements. Leveraging its successful experience with the energy-efficient design improvement for the residential HPWH, the Oak Ridge National Laboratory's (ORNL's) Engineering Science and Technology Division's (ESTD's) Building Equipment Group designed a water-heating appliance that combines HPWH efficiency with dedicated dehumidification. This integrated appliance could be a low-cost solution for dehumidification and efficient electric water heating. ORNL is partnering with Western Carolina University, Asheville-Buncombe Technical Community College, American Carolina Stamping Company, and Clemson University to develop this appliance and assess its market potential. For practical purposes, consumers are indifferent to how water is heated but are very interested in product attributes such as initial first cost, operating cost, performance, serviceability, product size, and installation costs. The principal drivers for penetrating markets are demonstrating reliability, leveraging the dehumidification attributes of the integrated WHD, and creating programs that embrace first-cost and life-cycle cost principles.

Ashdown, BG

2005-01-11T23:59:59.000Z

369

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...

370

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...

371

Measured Impact on Space Conditioning Energy Use in a Residence Due to Operating a Heat Pump Water Heater inside the Conditioned Space  

Science Conference Proceedings (OSTI)

The impact on space conditioning energy use due to operating a heat pump water heater (HPWH) inside the conditioned space is analyzed based on 2010-2011 data from a research house with simulated occupancy and hot water use controls. The 2700 ft2 (345 m2) house is located in Oak Ridge, TN (mixed-humid climate) and is equipped with a 50 gallon (189 l) HPWH that provided approximately 55 gallons/d (208 l/d) of hot water at 120 F (46 C) to the house during the test period. The HPWH has been operated every other week from December 2010 through November 2011 in two modes; a heat pump only mode, and a standard mode that utilizes 15355 Btu/hr (4500 W) resistance heating elements. The energy consumption of the air-source heat pump (ASHP) that provides space conditioning for the house is compared for the two HPWH operating modes with weather effects taken into account. Impacts during the heating and cooling seasons are compared.

Munk, Jeffrey D [ORNL; Ally, Moonis Raza [ORNL; Baxter, Van D [ORNL

2012-01-01T23:59:59.000Z

372

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

373

West Village Community: Quality Management Processes and Preliminary Heat Pump Water Heater Performance  

Science Conference Proceedings (OSTI)

West Village, a multi-use project underway at the University of California Davis, represents a ground-breaking sustainable community incorporating energy efficiency measures and on-site renewable generation to achieve community-level Zero Net Energy (ZNE) goals. The project when complete will provide housing for students, faculty, and staff with a vision to minimize the community's impact on energy use by reducing building energy use, providing on-site generation, and encouraging alternative forms of transportation. This focus of this research is on the 192 student apartments that were completed in 2011 under Phase I of the West Village multi-year project. The numerous aggressive energy efficiency measures implemented result in estimated source energy savings of 37% over the B10 Benchmark. There are two primary objectives of this research. The first is to evaluate performance and efficiency of the central heat pump water heaters as a strategy to provide efficient electric water heating for net-zero all-electric buildings and where natural gas is not available on site. In addition, effectiveness of the quality assurance and quality control processes implemented to ensure proper system commissioning and to meet program participation requirements is evaluated. Recommendations for improvements that could improve successful implementation for large-scale, high performance communities are identified.

Dakin, B.; Backman, C.; Hoeschele, M.; German, A.

2012-11-01T23:59:59.000Z

374

NREL Develops Heat Pump Water Heater Simulation Model (Fact Sheet), NREL Highlights, Research & Development, NREL (National Renewable Energy Laboratory)  

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

simulation model helps researchers evaluate real-world simulation model helps researchers evaluate real-world impacts of heat pump water heaters in U.S. homes. Heat pump water heaters (HPWHs) remove heat from the air and use it to heat water, presenting an energy-saving opportunity for homeowners. Researchers at the National Renewable Energy Laboratory (NREL) developed a simulation model to study the inter- actions of HPWHs and space conditioning equipment, related to climate and installa- tion location in the home. This model was created in TRNSYS and is based on data from HPWHs tested at NREL's Advanced HVAC Systems Laboratory. The HPWH model accounts for the condenser coil wrapped around the outside of the storage tank, and uses a data-based performance map. Researchers found that simulated energy use was within 2% of lab results, which confirms

375

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

376

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

377

Solar heater  

SciTech Connect

The invention is a solar heater which may function as a humidifier and which has a reflector that is constructed to provide a window, and external thermal insulation. The window has a cover that is positioned to transmit solar radiation to the reflector. The top portion of the reflector has an opening, and a container is removably positioned in the opening. The reflector has a geometry that reflects a high percentage of solar energy to the container, which has a surface with high absorptance. The container has a removable lid for confining heat within the container for certain functions, such as boiling water or drying clothes. When used as a humidifier, the container is filled with water and the lid is removed.

Hill, C.W.

1981-06-23T23:59:59.000Z

378

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

379

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

380

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

Note: This page contains sample records for the topic "hot water heater" 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

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

382

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

383

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...

384

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,

385

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

386

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

387

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

388

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

389

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

390

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

391

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

392

Estimating Costs and Efficiency of Storage, Demand, and Heat Pump Water  

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

Estimating Costs and Efficiency of Storage, Demand, and Heat Pump Estimating Costs and Efficiency of Storage, Demand, and Heat Pump Water Heaters Estimating Costs and Efficiency of Storage, Demand, and Heat Pump Water Heaters June 14, 2012 - 7:38pm Addthis A water heater's energy efficiency is determined by the energy factor (EF), which is based on the amount of hot water produced per unit of fuel consumed over a typical day. The higher the energy factor, the more efficient the water heater. A water heater's energy efficiency is determined by the energy factor (EF), which is based on the amount of hot water produced per unit of fuel consumed over a typical day. The higher the energy factor, the more efficient the water heater. What does this mean for me? Estimate the annual operating costs and compare several water heaters to determine whether it is worth investing in a more efficient

393

Analysis of the Effects of the Application of Solar Water Heater in Building Energy Consumption  

E-Print Network (OSTI)

With the development of the economy, civilian construction in the Changjiang River delta region is rapidly expanding. The boom in the construction industry definitely results in that the proportion of building energy consumption to whole energy consumption in the national economy will increase. The energy consumption of the air conditioning system, lighting system and hot-water system are the main components of the building energy consumption. Theoretically, solar energy can meet the requirements for these systems by changing the technology of photo-electricity and photo-thermal. However, the application of these technologies is on the basis of demand of space and atmospheric clarity conditions. This paper focuses on the specific conditions of city and building construction in the Changjiang River delta region, discusses the applying condition of photo-thermal transformation technology of solar energy, then analyzes the influence of mature applications of this technology on energy consumption.

Wang, J.; Li, Z.

2006-01-01T23:59:59.000Z

394

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

395

Oil and Gas Air Heaters  

E-Print Network (OSTI)

Most conventional air heaters adopt indirect heat transfer, which uses combustion gases to indirectly heat fresh air by heating surfaces to generate hot air used for material drying and dehumidification. We call them indirect air heaters. However, they have a higher manufacturing cost and lower thermal efficiency, especially when high temperature air is needed. For this reason, a direct air heater applicable for or feed and industrial raw products is put forward, which has advantages such as less production cost, smaller dimensions and higher thermal efficiency. Their design, working principles, characteristics, structure and applications are presented in this article, and brief comparisons are made between the indirect and direct air heater. Finally, the relation of hot-air temperature, oil or gas consumption and fresh airflow is determined based on energy equilibrium.

Kou, G.; Wang, H.; Zhou, J.

2006-01-01T23:59:59.000Z

396

Solar pool heater  

SciTech Connect

A solar pool heater is defined by a submersible tubular ring attached to the perimeter of a transparent or translucent sheet. Floatation of the heater is obtained through an air bubble captured by the sheet and maintained by the ring. The ring is perforated to permit the entry of water within the ring to induce partial submersion and thereby establish a peripheral seal about the captured air bubble. The submersed ring also prevents overlapping of adjacent heaters and reduces the likelihood of the heaters being blown off the pool by wind. By developing the sheet from material transparent to at least a spectrum of the solar rays, the air space intermediate the sheet and the underlying water surface will provide a ''greenhouse'' effect to heat the water through direct impingement by the received radiant energy; additionally, radiation of heat from the water will be reduced by the sheet, whereby, the heater not only collects but retains the impinged radiant energy.

Acker, L.C.

1980-09-16T23:59:59.000Z

397

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.

398

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

399

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

400

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

Note: This page contains sample records for the topic "hot water heater" 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

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

402

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...

403

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,

404

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

405

Durability and reliability of solar domestic hot water heaters: Survey results. Final report, Part 1  

SciTech Connect

An unresolved barrier for consumer acceptance of SDWH systems is the perception that they are unreliable and that their service life is significantly less than that claimed by the manufacturers/dealers. A comprehensive survey was developed to identify and define the relevant durability and reliability issues that affect the long term performance of SDWH systems. The survey was directed towards installers and service contractors with significant field experience.

Ramirez-Vargas, R.; Whitfield, K. [Arizona State Univ., Tempe, AZ (United States); Hicks, B.; Wood, B.D. [Univ. of Nevada, Reno, NV (United States)

1998-03-01T23:59:59.000Z

406

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

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

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...

407

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

408

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...

409

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...

410

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

411

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

412

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

413

Auto-Calibration and Control Strategy Determination for a Variable-Speed Heat Pump Water Heater Using Optimization  

SciTech Connect

This paper introduces applications of the GenOpt optimizer coupled with a vapor compression system model for auto-calibration and control strategy determination towards the development of a variable-speed ground-source heat pump water heating unit. The GenOpt optimizer can be linked with any simulation program using input and output text files. It effectively facilitates optimization runs. Using our GenOpt wrapper program, we can flexibly define objectives for optimizations, targets, and constraints. Those functionalities enable running extensive optimization cases for model calibration, configuration design and control strategy determination. In addition, we describe a methodology to improve prediction accuracy using functional calibration curves. Using the calibrated model, we investigated control strategies of the ground-source heat pump water heater, considering multiple control objectives, covering the entire operation range.

Shen, Bo [ORNL; Abdelaziz, Omar [ORNL; Rice, C Keith [ORNL

2012-01-01T23:59:59.000Z

414

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

415

Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 1, Methodology  

SciTech Connect

The Energy Policy and Conservation Act (P.L. 94-163), as amended, establishes energy conservation standards for 12 of the 13 types of consumer products specifically covered by the Act. The legislation requires the Department of Energy (DOE) to consider new or amended standards for these and other types of products at specified times. DOE is currently considering amending standards for seven types of products: water heaters, direct heating equipment, mobile home furnaces, pool heaters, room air conditioners, kitchen ranges and ovens (including microwave ovens), and fluorescent light ballasts and is considering establishing standards for television sets. This Technical Support Document presents the methodology, data, and results from the analysis of the energy and economic impacts of the proposed standards. This volume presents a general description of the analytic approach, including the structure of the major models.

Not Available

1993-11-01T23:59:59.000Z

416

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

417

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

418

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

419

Passively operated spool valve for drain-down freeze protection of thermosyphon water heaters. Final technical report  

SciTech Connect

The work done to extend the existing drain-down valve technology to provide passive drain-down freeze protection for thermosyphon-based solar water heaters is described. The basic design of the existing valve model is that of a spool valve, employing a cylindrical spool which moves axially in a mating cartridge to open and close o-rings at the two operating extremes (drain and operate) to perform the valving function. Three passive actuators to drive the basic valving mechanism were designed, fabricated, and tested. Two piping configurations used to integrate the spool valve with the thermosyphon system are described, as are the passive actuators. The three actuator designs are: photovoltaic driven, refrigerant-based bellows, and heat motor cable-drive designs. Costs are compared for the alternative actuator designs, and operating characteristics were examined for the thermosyphon system, including field tests. The market for the valve for thermosyphon systems is then assessed. (LEW)

1982-04-30T23:59:59.000Z

420

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...

Note: This page contains sample records for the topic "hot water heater" 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.


421

Solar Swimming Pool Heaters | Department of Energy  

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

Swimming Pool Heaters Swimming Pool Heaters Solar Swimming Pool Heaters May 29, 2012 - 6:03pm Addthis An example of a solar pool heater. An example of a solar pool heater. You can significantly reduce swimming pool heating costs by installing a solar pool heater. They're cost competitive with both gas and heat pump pool heaters, and they have very low annual operating costs. Actually, solar pool heating is the most cost-effective use of solar energy in many climates. How They Work Most solar pool heating systems include the following: A solar collector -- the device through which pool water is circulated to be heated by the sun A filter -- removes debris before water is pumped through the collector A pump -- circulates water through the filter and collector and back to the pool A flow control valve -- automatic or manual device that diverts pool

422

Solar Swimming Pool Heaters | Department of Energy  

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

Solar Swimming Pool Heaters Solar Swimming Pool Heaters Solar Swimming Pool Heaters May 29, 2012 - 6:03pm Addthis An example of a solar pool heater. An example of a solar pool heater. You can significantly reduce swimming pool heating costs by installing a solar pool heater. They're cost competitive with both gas and heat pump pool heaters, and they have very low annual operating costs. Actually, solar pool heating is the most cost-effective use of solar energy in many climates. How They Work Most solar pool heating systems include the following: A solar collector -- the device through which pool water is circulated to be heated by the sun A filter -- removes debris before water is pumped through the collector A pump -- circulates water through the filter and collector and back to the pool

423

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

424

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation. 14 figs.

Thorogood, R.M.

1983-12-27T23:59:59.000Z

425

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1986-01-01T23:59:59.000Z

426

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1983-01-01T23:59:59.000Z

427

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.

428

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

429

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

430

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

431

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

432

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

433

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

434

Economics of residential gas furnaces and water heaters in United States new construction market  

E-Print Network (OSTI)

heating appliances 3 , solar water heating, district heatingOther includes solar, wood, no heating c Electric resistance

Lekov, Alex B.

2010-01-01T23:59:59.000Z

435

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

heating appliances, 3 solar water heating, district heating,Other includes solar, wood, and no heating b Table 2 US

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

436

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

437

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

438

Austin Energy- Solar Water Heating Rebate  

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

Austin Energy offers its residential, commercial, and municipal customers up front rebates or a low interest loan for the purchase and installation of solar hot water heaters. Because the program...

439

Economics of residential gas furnaces and water heaters in US new construction market  

E-Print Network (OSTI)

gy.gov/buildings/appliance_standards/residential/water_Efficiency in Domestic Appliances and Lighting (EEDAL 06).http://www1.eere.energy.gov/ buildings/appliance_standards/

Lekov, Alex B.; Franco, Victor H.; Wong-Parodi, Gabrielle; McMahon, James E.; Chan, Peter

2010-01-01T23:59:59.000Z

440

Microsoft Word - ASHRAE_Water Heater Paper_2010-11-24_Final_LBNL...  

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

cost (MPC) at each efficiency level. DOE first identified the most common water heating products on the market and determined their corresponding efficiencies and the...

Note: This page contains sample records for the topic "hot water heater" 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.


441

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

442

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

443

Small Space Heaters  

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

Small space heaters, also called portable heaters, are typically used when the main heating system is inadequate or when central heating is too costly to install or operate. Space heater capacities...

444

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

445

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

446

Austin, TexasPARAMETRIC STUDY OF COMPONENT SELECTION AND OPERATION ON GENERIC DRAIN-BACK SOLAR WATER HEATER CERTIFICATION  

E-Print Network (OSTI)

I. Early experimental results of a research program to investigate the practicality of replacing the Solar Rating and Certification Corporation four day rating procedure with a more cost effective rating method for generic solar domestic hot water systems are reported. The generic systems experimental procedure and facility are described. Results from four experiments give an initial indication that the recirculation flow rate has little effect on system rating. Further experiments are required to assess the feasibility of replacing the current rating method with a simulated rating. 1.

W. T. Carlson; J. H. Davidson; W. S. Duff; D. M. Leone

1990-01-01T23:59:59.000Z

447

An energy equivalency analysis of trade-offs between thermal efficiency and standby loss requirements for commercial gas service water heaters  

SciTech Connect

The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) Standing Standard Project Committee 90.1 has approved an addendum (90.lb) to ASHRAE/IES Standard 90.1-1989. The addendum specifies an increase in the minimum thermal efficiency requirement (from 77% to 78%), accompanied by an easing of the standby loss requirements, for commercial gas-fired service water heaters. The Pacific Northwest Laboratory performed an energy equivalency analysis to assess the impact of trade-offs between the improved thermal efficiency and the less stringent standby loss requirements. The analysis objective was to estimate whether the energy savings during firing would offset the increased energy losses during standby periods. The primary focus of this report is to summarize the major results of the analysis and provide a recommendation for minimum energy-efficiency commercial gas-fired service water heaters. Limitations to the availability of detailed performance and energy-use data for these commercial water heaters are also pointed out.

Somasundaram, S.; Jarnagin, R.E.; Keller, J.M.; Schliesing, J.S.

1992-06-01T23:59:59.000Z

448

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

449

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

450

Water augmented indirectly-fired gas turbine systems and method  

SciTech Connect

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a higher driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1,000.degree. C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, Thomas F. (Lebanon, PA); Parsons, Jr., Edward J. (Morgantown, WV)

1992-01-01T23:59:59.000Z

451

Water augmented indirectly-fired gas turbine system and method  

DOE Patents (OSTI)

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a high driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1000{degrees}C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, T.F.; Parsons, E.J. Jr.

1991-12-31T23:59:59.000Z

452

Water augmented indirectly-fired gas turbine system and method  

DOE Patents (OSTI)

An indirectly-fired gas turbine system utilizing water augmentation for increasing the net efficiency and power output of the system is described. Water injected into the compressor discharge stream evaporatively cools the air to provide a high driving temperature difference across a high temperature air heater which is used to indirectly heat the water-containing air to a turbine inlet temperature of greater than about 1000[degrees]C. By providing a lower air heater hot side outlet temperature, heat rejection in the air heater is reduced to increase the heat recovery in the air heater and thereby increase the overall cycle efficiency.

Bechtel, T.F.; Parsons, E.J. Jr.

1991-01-01T23:59:59.000Z

453

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...

454

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

455

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...

456

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":""}]}

457

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

458

Building America Top Innovations Hall of Fame Profile … 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

459

Energy-efficient water heating  

SciTech Connect

This fact sheet describes how to reduce the amount of hot water used in faucets and showers, automatic dishwashers, and washing machines; how to increase water-heating system efficiency by lowering the water heater thermostat, installing a timer and heat traps, and insulating hot water pipes and the storage tank; and how to use off-peak power to heat water. A resource list for further information is included.

NONE

1995-01-01T23:59:59.000Z

460

Medium-temperature air-heater development program. Final report, October 1, 1977-December 31, 1978  

DOE Green Energy (OSTI)

A program to design, fabricate, and verify by test a low-cost (in volume production), modularized, practical solar air heater adaptable for new or retrofit space-heating and hot-water applications is described. The unique hardware elements of the SOLAIR II medium-temperature air heater described are the TCA solar collectors, energy transfer module, interconnecting ductwork, and mounting hardware. SOLAIR II is a two-tank domestic hot-water-augmented system. The system is described in detail; market and design analyses are described; fabrication procedures are noted; and design verification tests and results are discussed. The design used for the pre-production lot was essentially the SOLAIR II design and will serve as the basis for future design evaluations as the product is introduced into the commercial market.

Not Available

1979-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "hot water heater" 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.


461

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

462

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

463

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

464

Feedwater Heater Maintenance Guide  

Science Conference Proceedings (OSTI)

This guide provides plant personnel with information on the operation, maintenance, and performance of feedwater heaters. The contents of this guide will assist plant personnel in improving feedwater heater reliability, performance, and maintenance practices.

2002-05-29T23:59:59.000Z

465

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.

466

Water and energy conservation system for food serving establishments  

SciTech Connect

A water and energy conserving apparatus is described for supplying pre-heated water to a hot water heater and for cooling at least one refrigeration unit using a compressible medium in a food serving establishment comprising, a pre-heater tank adapted to receive water from a cold water source and having a cold water inlet line connected to the cold water source and a cold water outlet line. A heat exchanger which is associated with the refrigeration unit is connected to the cold water output line coming from the tank. A hot water output line is connected between the heat exchanger and the tank for returning water from the heat exchanger to the tank. The compressible medium which is hot is supplied from the refrigeration unit to the heat exchanger and the water flowing through the heat exchanger cools the compressible medium thus picking up heat. A circulator is connected into the hot water output line for circulating water from the tank to the heat exchanger and back. A drain line is connected to the heated water output line and includes a normally closed solenoid valve. The drain line is connected to a drain and is provided to vent water from the pre-heater tank. A thermostat is connected to the cold water output line coming from the tank to sense the temperature. The thermostat is connected to a power supply which powers the solenoid and when the temperature of water in the cold water output line rises above a selected value, which is preferably in the vicinity of 85 degrees Fahrenheit, the solenoid valve is energized to open the flow of water in the drain line and vent water from the pre-heater tank. A pre-heater water line is connected between the pre-heater tank and the hot water heater to supply pre-heated water to the hot water heater to conserve energy used in heating the otherwise cold water normally supplied to the hot water heater.

Papadakos, J.

1981-01-27T23:59:59.000Z

467

Dampers for Natural Draft Heaters: Technical Report  

Science Conference Proceedings (OSTI)

Energy required for water heating accounts for approximately 40percent of national residential natural gas consumption in California. With water heating contributing such a substantial portion of natural gas consumption, it is important to pay attention to water heater efficiencies. This paper reports on an investigation of a patented, buoyancy-operated flue damper. It is an add-on design to a standard atmospherically vented natural-draft gas-fired storage water heater. The flue damper was expected to reduce off-cycle standby losses, which would lead to improvements in the efficiency of the water heater. The test results showed that the Energy Factor of the baseline water heater was 0.576. The recovery efficiency was 0.768. The standby heat loss coefficient was 10.619 (BTU/hr-oF). After the damper was installed, the test results show an Energy Factor for the baseline water heater of 0.605. The recovery efficiency was 0.786. The standby heat loss coefficient was 9.135 (BTU/hr-oF). The recovery efficiency increased 2.3percent and the standby heat loss coefficient decreased 14percent. When the burner was on, the baseline water heater caused 28.0 CFM of air to flow from the room. During standby, the flow was 12.4 CFM. The addition of the damper reduced the flow when the burner was on to 23.5 CFM. During standby, flow with the damper was reduced to 11.1 CFM. The flue damper reduced off-cycle standby losses, and improved the efficiency of the water heater. The flue damper also improved the recovery efficiency of the water heater by restricting on-cycle air flows through the flue.With or without the flue damper, off-cycle air flow upthe stack is nearly half the air flow rate as when the burner is firing.

Lutz, James D.; Biermayer, Peter; King, Derek

2008-10-27T23:59:59.000Z

468

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

469

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.