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Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

2

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

3

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...

4

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

5

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 ...

6

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

7

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...

8

Heat Pump Water HeatersLaboratory 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

9

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

10

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

11

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

12

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

13

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

14

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

15

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)

16

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

17

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

18

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

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

19

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

20

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 "heat-pump water heaters" 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

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...

22

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

23

Energy Basics: Heat Pump Water Heaters  

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

for optimum operation in either summer or winter. Homeowners primarily install geothermal heat pumps-which draw heat from the ground during the winter and from the indoor air...

24

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

25

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

26

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

27

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

28

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

29

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

30

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.

31

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.

32

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

33

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...

34

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...

35

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

36

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...

37

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

38

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

39

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

40

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

42

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

43

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

44

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

45

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...

46

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

47

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

48

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?

49

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

50

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

51

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

52

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

53

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.

54

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, andif ...

2013-09-04T23:59:59.000Z

55

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

56

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

57

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

58

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

59

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

60

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

62

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

63

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

64

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

65

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

66

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

67

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

68

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

69

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

70

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

71

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

72

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

73

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

74

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

75

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

76

Consolidated Electric Cooperative- Heat Pump and Water Heating Rebates  

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

Consolidated Electric Cooperative provides rebates to residential customers who install electric water heaters, dual-fuel heating system or geothermal heat pumps. A dual-fuel heating systems...

77

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

78

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

79

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

80

Heat Pump Water Heating Modeling in EnergyPlus  

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

Heat Pump Water Heater Modeling Heat Pump Water Heater Modeling in EnergyPlus Building America Residential Energy Efficiency Stakeholder Meeting Eric Wilson Craig Christensen March 1, 2012 2 Modeling Issues Results Motivation Heat Pump Water Heater Modeling... 3 Gap: Existing analysis tools cannot accurately model HPWHs with reasonable runtime. 4 What have we achieved so far? Laboratory Evaluations 14 x Field Monitoring 5 Closing the Gap Laboratory Evaluations 6 sec timestep hourly timestep 14 x Field Monitoring CARB 6 Why is modeling important? * Performance varies: Can't just use EF * System interaction o HPWH affects building heating and cooling o Space conditions affect HPWH performance 7 Modeling Goals * Manage Risks o Accuracy o Run time o Occupant satisfaction * Flexibility to explore the effects of:

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Illustrative Calculation of Economics for Heat Pump and "Grid...  

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

Illustrative Calculation of Economics for Heat Pump and "Grid-Enabled" Water Heaters Illustrative Calculation of Economics for Heat Pump and "Grid-Enabled" Water Heaters Rate...

82

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

83

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...

84

Coast Electric Power Association - Heat Pump and Weatherization...  

Open Energy Info (EERE)

CaulkingWeather-stripping, Doors, DuctAir sealing, Heat pumps, Water Heaters, Windows, Geothermal Heat Pumps, Generators Active Incentive No Incentive Inactive Date 0803...

85

Performance Analysis of Air-Source Variable Speed Heat Pumps and Various Electric Water Heating Options  

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

Analysis of Air- Analysis of Air- Source Variable Speed Heat Pumps and Various Electric Water Heating Options Jeffrey Munk Oak Ridge National Laboratory 2 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Acknowledgements * Tennessee Valley Authority - David Dinse * U.S. Department of Energy * Roderick Jackson * Tony Gehl * Philip Boudreaux * ZEBRAlliance 3 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Overview * Electric Water Heating Options - Conventional Electric Water Heaters - Heat Pump Water Heaters * Air-Source * Ground-Source - Solar Thermal Water Heater * Variable Speed Heat Pumps - Energy Use Analysis - Measured Performance - Operational Characteristics 4 Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Water Heating Options

86

Advanced Heat Pump Water Heating Technology: Testing Commercial and Residential Systems in the Laboratory and Field  

Science Conference Proceedings (OSTI)

Heat pump water heaters (HPWHs) provide electric water heating at a much greater overall efficiency than conventional electric resistance systems. In the residential market, approximately half of all water heaters are electric resistance; these systems can be replaced by HPWHs in most applications with expected savings of 30%60%. In commercial applications, most systems presently use natural gas or another fuel in direct combustion. Emerging HPWH systems are now able to provide water heating ...

2013-12-20T23:59:59.000Z

87

Water-Loop Heat Pump Systems: Assessment Study Update  

Science Conference Proceedings (OSTI)

Water-loop heat pump systems, composed of multiple water-source heat pumps, a boiler, and a cooling tower operating in a closed water loop are a key segment of the commercial building heat pump market. This type of system provides a low-first-cost, versatile, and energy-efficient approach to space conditioning commercial buildings that have simultaneous heating and cooling loads.

1991-10-25T23:59:59.000Z

88

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...

89

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...

90

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

91

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...

92

Assessment and Demonstration of Advanced Heat Pumps for Commercial Building Water Heating Applications  

Science Conference Proceedings (OSTI)

Heat pump water heaters (HPWH) are an alternative to electric resistance or natural gas for domestic water heating. HPWHs are less common than other water heating technologies, but offer the potential for improved energy efficiency and potential for reduction of net CO2 emissions. New products, mainly for residential application, have been introduced to the American market over the last 2 years, which have been previously reviewed by EPRI. This report focuses on commercial applications and provides initi...

2010-12-31T23:59:59.000Z

93

Heat Pump Water Heaters | Department of Energy  

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

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....

94

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.

95

Energy Basics: Absorption Heat Pumps  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

96

Energy Basics: Heat Pump Systems  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating Heat...

97

Energy Basics: Geothermal Heat Pumps  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

98

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

99

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

100

Experimental investigation on the photovoltaic-thermal solar heat pump air-conditioning system on water-heating mode  

Science Conference Proceedings (OSTI)

An experimental study on operation performance of photovoltaic-thermal solar heat pump air-conditioning system was conducted in this paper. The experimental system of photovoltaic-thermal solar heat pump air-conditioning system was set up. The performance parameters such as the evaporation pressure, the condensation pressure and the coefficient of performance (COP) of heat pump air-conditioning system, the water temperature and receiving heat capacity in water heater, the photovoltaic (PV) module temperature and the photovoltaic efficiency were investigated. The experimental results show that the mean photovoltaic efficiency of photovoltaic-thermal (PV/T) solar heat pump air-conditioning system reaches 10.4%, and can improve 23.8% in comparison with that of the conventional photovoltaic module, the mean COP of heat pump air-conditioning system may attain 2.88 and the water temperature in water heater can increase to 42 C. These results indicate that the photovoltaic-thermal solar heat pump air-conditioning system has better performances and can stably work. (author)

Fang, Guiyin; Hu, Hainan; Liu, Xu [Department of Physics, Nanjing University, Nanjing 210093 (China)

2010-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Water-Loop Heat Pump Systems: Volumes 1 and 2  

Science Conference Proceedings (OSTI)

Water-loop heat pump (WLHP) systems are reliable, versatile, energy-efficient alternatives to conventional systems such as packaged rooftop or central chiller systems. These systems offer low installed costs, unparalleled design flexibility, and an inherent ability to recover heat in a variety of commercial and multifamily residential buildings for both new construction and retrofit markets.

1993-04-01T23:59:59.000Z

102

Alabama Power - Residential Heat Pump and Weatherization Loan...  

Open Energy Info (EERE)

Doors, DuctAir sealing, Heat pumps, Programmable Thermostats, Water Heaters, Windows Active Incentive Yes Implementing Sector Utility Energy Category Energy Efficiency...

103

VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX  

E-Print Network (OSTI)

, two conventional air- to-ir heat pumps, an air-to-air heat pump with desuperheater water heater for several novel and conventional heat pump systems for space conditioning and water heating. Systems tested include the Annual Cycle Energy System (ACES), solar assisted heat pumps (SAHP) both parallel and series

Oak Ridge National Laboratory

104

Energy Basics: Air-Source Heat Pumps  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

105

GROUND WATER PROTECTION ISSUES WITH GEOTHERMAL HEAT PUMPS  

DOE Green Energy (OSTI)

Closed loop vertical boreholes used with geothermal heat pumps are grouted to facilitate heat transfer and prevent ground water contamination. The grout must exhibit suitable thermal conductivity as well as adequate hydraulic sealing characteristics. Permeability and infiltration tests were performed to assess the ability of cementitious grout to control vertical seepage in boreholes. It was determined that a superplasticized cement-sand grout is a more effective borehole sealant than neat cement over a range of likely operational temperatures. The feasibility of using non-destructive methods to verify bonding in heat exchangers is reviewed.

ALLAN,M.L.; PHILIPPACOPOULOS,A.J.

1999-10-01T23:59:59.000Z

106

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.

107

Peak Demand Reduction with Dual-Source Heat Pumps Using Municipal Water  

E-Print Network (OSTI)

The objective of this project was to examine a dual-source (air and/or water-coupled) heat pump concept which would reduce or eliminate the need for supplemental electrical resistance heating (strip heaters). The project examined two system options: switching on demand between completely air-source and completely water-coupled or using a concurrent partial water-coupled and partial air-coupled mode operation. The water supply for the water-coupled mode of operation would be the municipal water system. An estimate of the economic worth of this system concept was made by examining the incremental cost to install such a system against the expected savings associated with these systems.

Morehouse, J. H.; Khan, J. A.; Connor, L. N.; Pal, D.

1992-05-01T23:59:59.000Z

108

Economic Analysis of a Waste Water Resource Heat Pump Air-Conditioning System in North China  

E-Print Network (OSTI)

This paper describes the situation of waste water resource in north China and the characteristics and styles of a waste water resource heat pump system, and analyzes the economic feasibility of a waste water resource heat pump air-conditioning system including investment, operating fee and pay-back time. The results show that waste water resource heat pump air-conditioning system has a low investment, low operating fee and short payback time.

Chen, H.; Li, D.; Dai, X.

2006-01-01T23:59:59.000Z

109

Improving Water Loop Heat Pump Performance by Using Low Temperature Geothermal Fluid  

DOE Green Energy (OSTI)

Water-loop heat pump (WLHP) systems are an important option for space conditioning of commercial buildings. They provide the opportunity of saving energy through heat recovery and thermal balancing when heating and cooling occur simultaneously. WLHP systems typically operate with loop water temperature between 16 C and 32 C. When cooling loads dominate, loop water temperatures are maintained below 32 C by rejecting excess heat with a cooling tower. When heating dominates, loop water temperatures are maintained above 16 C by a heater input. The capacity and efficiency of water-source heat pumps (WSHP) in both operating modes are strong functions of the inlet water temperature. The emphasis of this paper is on the analysis of system performances, energy savings of the mixed cooling and heating mode of the WLHP systems for it is a unique operating mode in the air-conditioning and space heating systems. The energy saving effect by using low temperature geothermal as the heat input for WLHP systems was examined.

Xinguo, Li

1995-01-01T23:59:59.000Z

110

OPTIMIZED CONTROL STRATEGIES FOR A TYPICAL WATER LOOP HEAT PUMP SYSTEM.  

E-Print Network (OSTI)

??Water Loop Heat Pump (WLHP) System has been widely utilized in the Heating, Ventilating and Air Conditioning (HVAC) industry for several decades. There is no (more)

Lian, Xu

2011-01-01T23:59:59.000Z

111

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...

112

Heat-pump desuperheaters for supplying domestic hot water - estimation of energy savings and economic viability for residential applications  

SciTech Connect

The heat reclaimer is a double-wall heat exchange system that removes superheat from the heat pump (or central air conditioning) cycle and uses it to heat water for domestic uses. During summer operation, this heat would normally be rejected to the atmosphere without being used. Thus, water heating is accomplished using essentially no primary fuel. In winter, the heat extracted from the cycle would have been used for space heating. However, energy savings are possible above the heat pump balance point because water heating is performed at an enhanced efficiency. Potential energy savings and economic viability of the heat reclaimer were determined for 28 sites throughout the United States. These results indicate that the heat reclaimer is not economically attractive compared with gas- or oil-fired water heating systems. However, it is competitive with electric resistance water heaters. Based on these results, a calculational scheme has been developed that could be integrated into the model audit procedure.

Olszewski, M.; Fontana, E.C.

1983-05-01T23:59:59.000Z

113

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

114

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

115

Ground and Water Source Heat Pump Performance and Design for Southern Climates  

E-Print Network (OSTI)

Ground and water source heat pump systems have very attractive performance characteristics when properly designed and installed. These systems typically consist of a water-to-air or water-to-water heat pump linked to a closed loop vertical or horizontal ground-coupling, an open groundwater loop, or a surface water loop. This paper discusses system performance characteristics, component selection procedures presently being used, improvements currently being considered and future possibilities for improved efficiency and reliability. Optimum designs require proper matching of the heat pump unit to the water circulation system, the building space heating/cooling load and water heating requirements. General trends resulting from system and component choices will be discussed. Water heating methods with these heat pumps will be considered.

Kavanaugh, S.

1988-01-01T23:59:59.000Z

116

Thermal Economic Analysis of an Underground Water Source Heat Pump System  

E-Print Network (OSTI)

The paper presents the thermal economic analysis of an underground water source heat pump system in a high school building based on usage per exergy cost as an evaluation standard, in which the black box model has been used and the cost of underground water has also been considered. The economics of the heat pump and other cooling and heating sources has been compared and then several simple methods to improve the thermal economics of the underground water heat pump system have been put forward.

Zhang, W.; Lin, B.

2006-01-01T23:59:59.000Z

117

Ingredients for energy conservation: water cooled luminaires and the heat pump  

SciTech Connect

The energy crisis has focused attention on all aspects of building energy usage--particularly heating and cooling energy. The possibility of utilizing water-cooled luminaires in an area of high relative humidity is explored. Heating is done by a water source heat pump utilizing the water from the luminaires as source for the heat pump. The energy usage of the heat pump system is then compared with the energy usage of other heat reclaim systems thereby demonstrating the energy conservation capabilities of the system.

Dowless, E.C.

1976-01-01T23:59:59.000Z

118

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...

119

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

120

Energy Basics: Ductless, Mini-Split Heat Pumps  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

122

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....

123

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

124

Heat Pump Water Heater Modeling in EnergyPlus (Presentation)  

SciTech Connect

This presentation summarizes NREL's development of a HPWH model for use in hourly building energy simulation programs, such as BEopt; this presentation was given at the Building America Stakeholder meeting on March 1, 2012, in Austin, Texas.

Wilson, E.; Christensen, C.

2012-03-01T23:59:59.000Z

125

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

E-Print Network (OSTI)

and Renewable Energy (EERE). 1993. Technical SupportReport No. DOE/EE-0009. USDOE EERE. 2002. Technical Supportappliance_standards/ USDOE EERE. 2010. Final Rule Technical

Franco, Victor

2011-01-01T23:59:59.000Z

126

Heat Pump Water Heater Technology Assessment Based on Laboratory...  

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

translated to an annual energy savings of 56%, and the COP of a HPWH with an external condenser design was 1.8 or 44% annual energy savings (Morrison 2003). The technology was...

127

Heat Pump Water Heater Modeling in EnergyPlus (Presentation)  

SciTech Connect

This presentation summarizes NREL's development of a HPWH model for use in hourly building energy simulation programs, such as BEopt; this presentation was given at the Building America Stakeholder meeting on March 1, 2012, in Austin, Texas.

Wilson, E.; Christensen, C.

2012-03-01T23:59:59.000Z

128

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

129

Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate  

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

Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Kosciusko REMC - Residential Geothermal and Air-source Heat Pump Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Maximum of two rebates per household Program Info State Indiana Program Type Utility Rebate Program Rebate Amount Geothermal System: $250 Air-Source Heat Pump: $150 Electric Water Heater: $75 - $125 Provider Kosciusko REMC Kosciusko REMC offers rebates (as bill credits) to residential members for the purchase and installation of high efficiency air-source heat pumps, geothermal heat pumps, and electric water heaters. For each purchase of an

130

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

131

Ductless, Mini-Split Heat Pump Basics | Department of Energy  

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

Ductless, Mini-Split Heat Pump Basics Ductless, Mini-Split Heat Pump Basics Ductless, Mini-Split Heat Pump Basics August 19, 2013 - 11:04am Addthis Ductless, mini-split-system heat pumps (mini splits), as their name implies, do not have ducts. Therefore, they make good retrofit add-ons to houses or buildings with "non-ducted" heating systems, such as hydronic (hot water heat), radiant panels, and space heaters (wood, kerosene, propane). They can also be a good choice for room additions, where extending or installing distribution ductwork is not feasible. How Ductless, Mini-Split Heat Pumps Work Like standard air-source heat pumps, mini splits have two main components: an outdoor compressor/condenser, and an indoor air-handling unit. A conduit, which houses the power cable, refrigerant tubing, suction tubing,

132

Ductless, Mini-Split Heat Pumps | Department of Energy  

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

Ductless, Mini-Split Heat Pumps Ductless, Mini-Split Heat Pumps Ductless, Mini-Split Heat Pumps June 24, 2012 - 4:19pm Addthis What does this mean for me? You can take advantage of the fact that -- unlike earlier versions -- newer models of ductless mini-split heat pumps operate effectively in cold temperatures. If you are building an addition or doing a major remodel and your home does not have heating and cooling ducts, a ductless mini-split heat pump may be a cost-effective, energy-efficient choice. Ductless, mini-split-system heat pumps (mini splits) make good retrofit add-ons to houses with "non-ducted" heating systems, such as hydronic (hot water heat), radiant panels, and space heaters (wood, kerosene, propane). They can also be a good choice for room additions where extending or

133

Discussions on Disposal Forms of Auxiliary Heat Source in Surface Water Heat Pump System  

E-Print Network (OSTI)

This paper presents two common forms of auxiliary heat source in surface water heat pump system and puts forward the idea that the disposal forms affect operation cost. It deduces operation cost per hour of the two forms. With a project calculation, it illuminates that the post-located auxiliary heat source cheaper and superior to the fore-located one.

Qian, J.; Sun, D.; Li, X.; Li, G.

2006-01-01T23:59:59.000Z

134

WARMWASSER ERNEUERBARE ENERGIEN KLIMA RAUMHEIZUNG Adsorption Heat-Pumps for domestic heating  

E-Print Network (OSTI)

Energies > Instantaneous water heaters > www.stiebel-eltron.de #12;4 Motivation Gas condensing boiler HP for hot water and enhancing the heating system > From the regarded sources, solar is the best suited burner with heat pump unit > Solar hot water tank > Heat pump-unit t

Oak Ridge National Laboratory

135

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

136

Experiment System Analysis of an Indirect Expansion Solar Assisted Water Source Heat Pump Radiant Floor Heating System  

Science Conference Proceedings (OSTI)

A solar assisted water source heat pump for Radiant Floor Heating (SWHP-RFH) experimental system with heat pipe vacuum tube solar collector as heating source and radiant floor as terminal device is proposed in the paper. The Mathematics Model of dynamic ... Keywords: solar energy, water source heat pump, radiant floor heating systems, system dynamic COP

Qu Shilin; Ma Fei; Liu Li; Yue Jie

2009-10-01T23:59:59.000Z

137

$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

138

Application Prospect Analysis of the Surface Water Source Heat-Pump in China  

E-Print Network (OSTI)

Surface water resources in China are rather abundant and it can be use as the heat or cool source for heat pump. The winter surface water temperatures of 17 typical cities are investigated in December, and they are all distributed in the interval of 2~5?. The critical technical issue in the surface water heat pump is how to extract the freezing latent heat. The urban surface water supplying areas of 102 large or median cities in China are measured and counted. The supply area ratio, and mean heating or cooling need index are calculated separately and the 102 cities are classified by the three parameters. The data indicate that surface water can supply heat and cool source for 42.1% of the urban waterside buildings in China.

Zhang, C.; Zhuang, Z.; Huang, L.; Li, X.; Li, G.; Sun, D.

2006-01-01T23:59:59.000Z

139

The Influence of Different Inflow Water Rate and Temperature on Heat Exchange Performance of Underground Heat Pump  

Science Conference Proceedings (OSTI)

in the paper, the influence of different inflow water rate and temperature on heat exchange performance of underground heat pump were discussed by experiment, two vital parameters was defined to measure the properties of ground heat exchanger: Energy ... Keywords: heat pump, underground tube, influential factors, parameters

Zheng Min; Li Bai-yi

2011-11-01T23:59:59.000Z

140

Energy Savings and Breakeven Cost for Residential Heat Pump Water...  

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

volume of 45-60 galday, depending on mains water temperature. For every simulation, a home was also modeled to quantify the interaction between the HPWH and the space heating...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

142

Economical Analysis of a Groundwater Source Heat Pump with Water Thermal Storage System  

E-Print Network (OSTI)

The paper is based on a chilled and heat source for the building which has a total area of 140000m2 in the suburb of Beijing. By comparing the groundwater source heat pump of water thermal storage (GHPWTS) with a conventional chilled and heat source scheme in economical, technical, and environmental aspects, it is determined that the scheme of the groundwater source heat pump has better energy efficiency than others. The GHPWTS can take full advantage of the heat source from groundwater and benefit of electricity difference pricing during a day. Its character is a combination of a strength and another strength. It is the lowest cycle cost of all chide and heat source schemes. The GHPWTS has the best economic benefit and runs stably and reliably. Its advantage is clearly compared with other schemes. There is a real value for the project that is similar to the characteristic of this project and the condition of the water source.

Zhou, Z.; Xu, W.; Li, J.; Zhao, J.; Niu, L.

2006-01-01T23:59:59.000Z

143

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

144

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

145

Evaluation of water source heat pumps for the Juneau, Alaska Area  

Science Conference Proceedings (OSTI)

The purposes of this project were to evaluate the technical and economic feasibility of water source heat pumps (WSHP) for use in Juneau, Alaska and to identify potential demonstration projects to verify their feasibility. Information is included on the design, cost, and availability of heat pumps, possible use of seawater as a heat source, heating costs with WSHP and conventional space heating systems, and life cycle costs for WSHP-based heating systems. The results showed that WSHP's are technically viable in the Juneau area, proper installation and maintenance is imperative to prevent equipment failures, use of WSHP would save fuel oil but increase electric power consumption. Life cycle costs for WSHP's are about 8% above that for electric resistance heating systems, and a field demonstration program to verify these results should be conducted. (LCL)

Jacobsen, J.J.; King, J.C.; Eisenhauer, J.L.; Gibson, C.I.

1980-07-01T23:59:59.000Z

146

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

147

ORNL and General Electric Collaborate on Superefficient Water ...  

Star criteria for electric heat-pump water heaters. The GE Hybrid Water Heater is affordable and designed to be 50 percent

148

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

149

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...

150

Do You Have a Solar Water Heater?  

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

Earlier this week, Ernie wrote about theeconomics 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...

151

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...

152

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...

153

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...

154

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.

155

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...

156

Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate  

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

Wabash County REMC - Residential Geothermal and Air-source Heat Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate Program Wabash County REMC - Residential Geothermal and Air-source Heat Pump Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Geothermal: $750 Air Source Heat Pumps: $625 One rebate per house Program Info State Indiana Program Type Utility Rebate Program Rebate Amount Air Source Heat Pumps: $125 - $625/ton Geothermal Heat Pumps: $150 - $750/ton Water Heater: $100 Provider Wabash County REMC Wabash Rural Electric Membership Cooperative (REMC) is a member-owned electric distribution organization that provides service to customers in north-central Indiana. To encourage energy efficiency, Wabash County REMC

157

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

158

Municipal water-based heat pump heating and/or cooling systems: Findings and recommendations. Final report  

SciTech Connect

The purpose of the present work was to determine if existing heat pump systems based on municipal water systems meet existing water quality standards, to analyze water that has passed through a heat pump or heat exchanger to determine if corrosion products can be detected, to determine residual chlorine levels in municipal waters on the inlet as well as the outlet side of such installations, to analyses for bacterial contaminants and/or regrowth due to the presence of a heat pump or heat exchanger, to develop and suggest criteria for system design and construction, to provide recommendations and specifications for material and fluid selection, and to develop model rules and regulations for the installation, operation, and monitoring of new and existing systems. In addition, the Washington State University (WSU) has evaluated availability of computer models that would allow for water system mapping, water quality modeling and system operation.

Bloomquist, R.G. [Washington, State Univ., Pullman, WA (United States); Wegman, S. [South Dakota Utilities Commission (United States)

1998-04-01T23:59:59.000Z

159

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...

160

Energy Efficiency Supporting Policy and Heat Pumping Technology in Japan  

E-Print Network (OSTI)

(U.S. dollars) is calculated with Japan = 1. #12;2-1. Eco Cute : example of countermeasure for energy feature Counter flow Heat exchanger Heat pump unit Storage tank Ref: TEPCO Website Ref: HPTCJ HP Space in Residential sector (FY2009) e.g. Gas stove e.g. Air- conditioner e.g. Domestic water heater e.g. lighting PC

Oak Ridge National Laboratory

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Absorption Heat Pump Basics | Department of Energy  

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

Absorption Heat Pump Basics Absorption Heat Pump Basics Absorption Heat Pump Basics August 19, 2013 - 11:11am Addthis Absorption heat pumps are essentially air-source heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most common heat source for absorption heat pumps, they are also referred to as gas-fired heat pumps. There are also absorption coolers available that work on the same principal, but are not reversible and cannot serve as a heat source. These are also called gas-fired coolers. How Absorption Heat Pumps Work Residential absorption heat pumps use an ammonia-water absorption cycle to provide heating and cooling. As in a standard heat pump, the refrigerant (in this case, ammonia) is condensed in one coil to release its heat; its

162

Absorption Heat Pumps | Department of Energy  

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

Absorption Heat Pumps Absorption Heat Pumps Absorption Heat Pumps June 24, 2012 - 2:11pm Addthis Absorption heat pumps are essentially air-source heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most common heat source for absorption heat pumps, they are also referred to as gas-fired heat pumps. There are also absorption (or gas-fired) coolers available that work on the same principle. Unlike some absorption heat pumps, however, these are not reversible and cannot serve as a heat source. Residential absorption heat pumps use an ammonia-water absorption cycle to provide heating and cooling. As in a standard heat pump, the refrigerant (in this case, ammonia) is condensed in one coil to release its heat; its

163

Absorption Heat Pumps | Department of Energy  

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

Absorption Heat Pumps Absorption Heat Pumps Absorption Heat Pumps June 24, 2012 - 2:11pm Addthis Absorption heat pumps are essentially air-source heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most common heat source for absorption heat pumps, they are also referred to as gas-fired heat pumps. There are also absorption (or gas-fired) coolers available that work on the same principle. Unlike some absorption heat pumps, however, these are not reversible and cannot serve as a heat source. Residential absorption heat pumps use an ammonia-water absorption cycle to provide heating and cooling. As in a standard heat pump, the refrigerant (in this case, ammonia) is condensed in one coil to release its heat; its

164

Geothermal heat pump analysis article  

U.S. Energy Information Administration (EIA)

heat pump transfers heat from the ground or ground water to provide space heating. In the summer, the heat transfer process is reversed; the ground or groundwater

165

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

SciTech Connect

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

Stecher, D.; Allison, K.

2012-11-01T23:59:59.000Z

166

Simulation Study of Heat Transportation in an Aquifer about Well-water-source Heat Pump  

E-Print Network (OSTI)

The study of groundwater reinjection, pumping and heat transportation in an aquifer plays an important theoretical role in ensuring the stability of deep-well water reinjection and pumping as well as smooth reinjection. Based on the related conception of underground hydrogeology and the rationale of seepage flow mechanics, a geologic conceptual model of doublet reinjection and a seepage flow model of heat transportation are proposed in this paper. The temperature distribution in the temperature field was obtained by a coupled method of the heat transportation equation and groundwater seepage flow equation fitting for the seepage-affected section. The temperature changes in aquifer and heat storage efficiency are analyzed under different working conditions. All the work referenced above provided references for the popularization and evaluation of well-water source heat pump.

Cong, X.; Liu, Y.; Yang, W.

2006-01-01T23:59:59.000Z

167

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

168

Innovative Miniaturized Heat Pumps for Buildings: Modular Thermal Hub for Building Heating, Cooling and Water Heating  

SciTech Connect

BEETIT Project: Georgia Tech is using innovative components and system design to develop a new type of absorption heat pump. Georgia Techs new heat pumps are energy efficient, use refrigerants that do not emit greenhouse gases, and can run on energy from combustion, waste heat, or solar energy. Georgia Tech is leveraging enhancements to heat and mass transfer technology possible in microscale passages and removing hurdles to the use of heat-activated heat pumps that have existed for more than a century. Use of microscale passages allows for miniaturization of systems that can be packed as monolithic full-system packages or discrete, distributed components enabling integration into a variety of residential and commercial buildings. Compared to conventional heat pumps, Georgia Techs design innovations will create an absorption heat pump that is much smaller, has higher energy efficiency, and can also be mass produced at a lower cost and assembly time.

2010-09-01T23:59:59.000Z

169

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...

170

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

171

Tips: Heat Pumps | Department of Energy  

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

Heat Pumps Heat Pumps Tips: Heat Pumps June 24, 2013 - 5:48pm Addthis Heat pumps can be a cost-effective choice in moderate climates, especially if you heat your home with electricity. Heat pumps can be a cost-effective choice in moderate climates, especially if you heat your home with electricity. Heat pumps are the most efficient form of electric heating in moderate climates. Because they move heat rather than generate heat, heat pumps can provide equivalent space conditioning at as little as one quarter of the cost of operating conventional heating or cooling appliances. A heat pump does double duty as a central air conditioner by collecting the heat inside your house and pumping it outside. There are three types of heat pumps: air-to-air, water source, and geothermal. They collect heat from the air, water, or ground outside your

172

Ground Source Heat Pumps Ground source heat pumps (GSHPs) use the earth's  

E-Print Network (OSTI)

Ground Source Heat Pumps Fact Sheet Ground source heat pumps (GSHPs) use the earth's constant. Waste heat can be used to heat hot water. System Types There are two types of ground source heat pumps, closed loop and open loop systems. Closed loop heat pumps use the earth as the heat source and heat sink

Paulsson, Johan

173

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

174

Energy Consumption and Demand as Affected by Heat Pumps that Cool, Heat and Heat Domestic Water  

E-Print Network (OSTI)

Products or systems that heat, cool and heat domestic water, which are also referred to as integrated systems, have been available for several years. The concept is simple and appeals to consumers. This paper presents methods for evaluating the potential savings by using an integrated system that heats water by desuperheating discharge gas in the refrigeration cycle. The methods may be applied for any specific location, and their accuracy will depend on the accuracy of building loads and water usage estimates. Power demand can also be affected by electric water heaters. The methods presented demonstrate how integrated systems can be of value in reducing daily summertime peaks.

Cawley, R.

1992-05-01T23:59:59.000Z

175

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...

176

SIMULATION AND VALIDATION OF HYBRID GROUND SOURCE AND WATER-LOOP HEAT PUMP  

E-Print Network (OSTI)

.3 Plot of loads, operating heat pumps, and cooling tower setpoint for an office building in Albuquerque.20 Office building loads for Chicago.................................................................... 112 4.21 Office building loads for Houston

177

Economic viability of heat pump desuperheaters for supplying domestic hot water  

Science Conference Proceedings (OSTI)

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

Olszewski, M.

1984-01-01T23:59:59.000Z

178

Cedarburg Light and Water Utility - Residential Energy Efficiency...  

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

300 Water Heaters: 25 - 100 Tankless Water Heaters: 100 Heat Pump Water Heater: 300 Air SealingAttic Insulation: Up to 300 Energy Star Home Performance: 33.3% of cost up to...

179

Survey of advanced-heat-pump developments for space conditioning  

SciTech Connect

A survey of heat pump projects with special emphasis on those supported by DOE, EPRI, and the Gas Research Institute is presented. Some historical notes on heat pump development are discussed. Market and equipment trends, well water and ground-coupled heat pumps, heat-actuated heat pump development, and international interest in heat pumps are also discussed. 30 references.

Fairchild, P.D.

1981-01-01T23:59:59.000Z

180

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...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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...

182

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

183

Air-to-Water Heat Pumps With Radiant Delivery in Low-Load Homes  

SciTech Connect

Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

Backman, C.; German, A.; Dakin, B.; Springer, D.

2013-12-01T23:59:59.000Z

184

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

SciTech Connect

This report is one in a series of reports describing research activities in support of the US Department of Energy (DOE) Commercial Building System Integration Research Program. The goal of the program is to develop the scientific and technical basis for improving integrated decision-making during design and construction. Improved decision-making could significantly reduce buildings' energy use by the year 2010. The objectives of the Commercial Building System Integration Research Program are: to identify and quantify the most significant energy-related interactions among building subsystems; to develop the scientific and technical basis for improving energy related interactions in building subsystems; and to provide guidance to designers, owners, and builders for improving the integration of building subsystems for energy efficiency. The lead laboratory for this program is the Pacific Northwest Laboratory. A wide variety of expertise and resources from industry, academia, other government entities, and other DOE laboratories are used in planning, reviewing and conducting research activities. Cooperative and complementary research, development, and technology transfer activities with other interested organizations are actively pursued. In this report, the interactions of a water loop heat pump system and building structural mass and their effect on whole-building energy performance is analyzed. 10 refs., 54 figs., 1 tab.

Marseille, T.J.; Johnson, B.K.; Wallin, R.P.; Chiu, S.A.; Crawley, D.B.

1989-01-01T23:59:59.000Z

185

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

SciTech Connect

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

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

1990-09-01T23:59:59.000Z

186

Geothermal Heat Pumps Deliver Big Savings for Federal Facilities...  

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

Energy Efficiency and Renewable Energy, and the authoring national laboratory. Geothermal heat pump surface water loops. Geothermal Heat Pumps Deliver Big Savings for Federal...

187

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...

188

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

DOE Green Energy (OSTI)

Many commercial buildings need heat in one part and, at the same time, cooling in another part. Even more common is the need for heating during one part of the day and cooling during another in the same spaces. If that energy could be shifted or stored for later use, significant energy might be saved. If a building's heating and cooling subsystems could be integrated with the building's structural mass and used to collect, store, and deliver energy, the energy might be save cost-effectively. To explore this opportunity, researchers at the Pacific Northwest Laboratory (PNL) examined the thermal interactions between the heating, ventilating, and air-conditioning (HVAC) system and the structure of a commercial building. Computer models were developed to simulate the interactions in an existing building located in Seattle, Washington, to determine how these building subsystems could be integrated to improve energy efficiency. The HVAC subsystems in the existing building were modeled. These subsystems consist of decentralized water-source heat pumps (WSHP) in a closed water loop, connected to cooling towers for heat rejection during cooling mode and boilers to augment heating. An initial base case'' computer model of the Seattle building, as-built, was developed. Metered data available for the building were used to calibrate this model to ensure that the analysis would provide information that closely reflected the operation of a real building. The HVAC system and building structure were integrated in the model using the concrete floor slabs as thermal storage media. The slabs may be actively charged during off-peak periods with the chilled water in the loop and then either actively or passively discharged into the conditioned space during peak periods. 21 refs., 37 figs., 17 tabs.

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

1991-10-01T23:59:59.000Z

189

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

SciTech Connect

Many commercial buildings need heat in one part and, at the same time, cooling in another part. Even more common is the need for heating during one part of the day and cooling during another in the same spaces. If that energy could be shifted or stored for later use, significant energy might be saved. If a building's heating and cooling subsystems could be integrated with the building's structural mass and used to collect, store, and deliver energy, the energy might be save cost-effectively. To explore this opportunity, researchers at the Pacific Northwest Laboratory (PNL) examined the thermal interactions between the heating, ventilating, and air-conditioning (HVAC) system and the structure of a commercial building. Computer models were developed to simulate the interactions in an existing building located in Seattle, Washington, to determine how these building subsystems could be integrated to improve energy efficiency. The HVAC subsystems in the existing building were modeled. These subsystems consist of decentralized water-source heat pumps (WSHP) in a closed water loop, connected to cooling towers for heat rejection during cooling mode and boilers to augment heating. An initial base case'' computer model of the Seattle building, as-built, was developed. Metered data available for the building were used to calibrate this model to ensure that the analysis would provide information that closely reflected the operation of a real building. The HVAC system and building structure were integrated in the model using the concrete floor slabs as thermal storage media. The slabs may be actively charged during off-peak periods with the chilled water in the loop and then either actively or passively discharged into the conditioned space during peak periods. 21 refs., 37 figs., 17 tabs.

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

1991-10-01T23:59:59.000Z

190

Geothermal Heat Pumps | Department of Energy  

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

Geothermal Heat Pumps Geothermal Heat Pumps Geothermal Heat Pumps June 24, 2012 - 5:08pm Addthis Watch how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. How does it work? A geothermal heat pump uses the constant below ground temperature of soil or water to heat and cool your home. Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. They use the constant temperature of the earth as the exchange medium instead of the outside air temperature. This allows the system to reach fairly high efficiencies (300% to 600%) on the coldest winter nights, compared to 175% to 250% for air-source heat pumps on cool

191

Comparative evaluation of the impacts of domestic gas and electric heat pump heating on air pollution in California  

SciTech Connect

Residential space and water heating accounts for approximately 12% of California's and 15% of the United States, energy consumption. most Of the residential heating is by direct use of natural gas. combustion of natural gas is a contributor to the overall air pollution,, especially CO and NO{sub x} in the urban areas. Another efficient method for domestic water and space heating is use of electric heat pumps, the most popular category of which uses air as its heat source. Electric heat pumps do not emit air pollutants at the point of use, but use electric power, which is a major contributor to air pollution at its point of generation from fossil fuels. It is the specific objective of this report to evaluate and compare the energy efficiency and source air pollutants of natural gas heaters and electric heat pumps used for domestic heating. Effect of replacing natural gas heaters with electric heat pumps on air pollutant emissions due to domestic heating in two urban areas and in California as a whole has also been evaluated. The analysis shows that with the present state of technology, electric heat pumps have higher heating efficiencies than natural gas heaters. Considering the current electricity generation mix in the US, electric heat pumps produce two to four times more NO{sub x}, much less CO, and comparable amount of CO{sub 2} per unit of useful heating energy compared to natural gas heaters. With California mix, electric heat pumps produce comparable NO{sub x} and much less CO and approximately 30% less CO{sub 2} per unit heat output. Replacement of natural gas heaters with electric heat pumps will slightly increase the overall NO{sub x}, and reduce CO and CO{sub 2} emissions in California. The effect of advanced technology power generation and heat pump heating has also been analyzed.

Ganji, A. (San Francisco State Univ., CA (United States). Div. of Engineering)

1992-07-01T23:59:59.000Z

192

Comparative evaluation of the impacts of domestic gas and electric heat pump heating on air pollution in California. Final report  

SciTech Connect

Residential space and water heating accounts for approximately 12% of California`s and 15% of the United States, energy consumption. most Of the residential heating is by direct use of natural gas. combustion of natural gas is a contributor to the overall air pollution,, especially CO and NO{sub x} in the urban areas. Another efficient method for domestic water and space heating is use of electric heat pumps, the most popular category of which uses air as its heat source. Electric heat pumps do not emit air pollutants at the point of use, but use electric power, which is a major contributor to air pollution at its point of generation from fossil fuels. It is the specific objective of this report to evaluate and compare the energy efficiency and source air pollutants of natural gas heaters and electric heat pumps used for domestic heating. Effect of replacing natural gas heaters with electric heat pumps on air pollutant emissions due to domestic heating in two urban areas and in California as a whole has also been evaluated. The analysis shows that with the present state of technology, electric heat pumps have higher heating efficiencies than natural gas heaters. Considering the current electricity generation mix in the US, electric heat pumps produce two to four times more NO{sub x}, much less CO, and comparable amount of CO{sub 2} per unit of useful heating energy compared to natural gas heaters. With California mix, electric heat pumps produce comparable NO{sub x} and much less CO and approximately 30% less CO{sub 2} per unit heat output. Replacement of natural gas heaters with electric heat pumps will slightly increase the overall NO{sub x}, and reduce CO and CO{sub 2} emissions in California. The effect of advanced technology power generation and heat pump heating has also been analyzed.

Ganji, A. [San Francisco State Univ., CA (United States). Div. of Engineering

1992-07-01T23:59:59.000Z

193

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

194

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

195

Heat Pump Systems | Department of Energy  

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

Pump Systems Pump Systems Heat Pump Systems May 16, 2013 - 5:33pm Addthis A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. What does this mean for me? Heat pumps can supply heat, cooling, and hot water. Your climate and site will determine the type of heat pump most appropriate for your home. For climates with moderate heating and cooling needs, heat pumps offer an energy-efficient alternative to furnaces and air conditioners. Like your refrigerator, heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into

196

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

197

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

198

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

199

Heat pump arrangement  

SciTech Connect

The invention concerns a heat pump arrangement for heating of houses. The arrangement comprises a compressor, a condensor and a vaporizer, which is a part of an icing machine. The vaporizer is designed as a heat exchanger and is connected to a circulation system comprising an accumulator, to which the ice slush from the icing machine is delivered. Water from the accumulator is delivered to the icing machine. The water in the accumulator can be heated E.G. By means of a solar energy collector, the outdoor air etc. Surface water or waste water from the household can be delivered to the accumulator and replace the ice slush therein.

Abrahamsson, T.; Hansson, K.

1981-03-03T23:59:59.000Z

200

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...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

202

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...

203

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

204

Hybrid Geothermal Heat Pump Systems  

Science Conference Proceedings (OSTI)

Hybrid geothermal heat pump systems offer many of the benefits of full geothermal systems but at lower installed costs. A hybrid geothermal system combines elements of a conventional water loop heat pump system in order to reduce the geothermal loop heat exchanger costs, which are probably the largest cost element of a geothermal system. These hybrid systems have been used successfully where sufficient ground space to install large heat exchangers for full geothermal options was unavailable, or where the...

2009-12-21T23:59:59.000Z

205

Exergy and Energy analysis of a ground-source heat pump for domestic water heating under simulated occupancy conditions  

SciTech Connect

This paper presents detailed analysis of a water to water ground source heat pump (WW-GSHP) to provide all the hot water needs in a 345 m2 house located in DOE climate zone 4 (mixed-humid). The protocol for hot water use is based on the Building America Research Benchmark Definition (Hendron 2008; Hendron and Engebrecht 2010) which aims to capture the living habits of the average American household and its impact on energy consumption. The entire house was operated under simulated occupancy conditions. Detailed energy and exergy analysis provides a complete set of information on system efficiency and sources of irreversibility, the main cause of wasted energy. The WW-GSHP was sized at 5.275 kW (1.5-ton) for this house and supplied hot water to a 303 L (80 gal) water storage tank. The WW-GSHP shared the same ground loop with a 7.56 kW (2.1-ton) water to air ground source heat pump (WA-GSHP) which provided space conditioning needs to the entire house. Data, analyses, and measures of performance for the WW-GSHP in this paper complements the results of the WA-GSHP published in this journal (Ally, Munk et al. 2012). Understanding the performance of GSHPs is vital if the ground is to be used as a viable renewable energy resource.

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

2012-01-01T23:59:59.000Z

206

FEMP--Geothermal Heat Pumps  

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

heat pump-like an air conditioner or refrigera- heat pump-like an air conditioner or refrigera- tor-moves heat from one place to another. In the summer, a geothermal heat pump (GHP) operating in a cooling mode lowers indoor temperatures by transferring heat from inside a building to the ground outside or below it. Unlike an air condition- er, though, a heat pump's process can be reversed. In the winter, a GHP extracts heat from the ground and transfers it inside. Also, the GHP can use waste heat from summer air-conditioning to provide virtually free hot-water heating. The energy value of the heat moved is typically more than three times the electricity used in the transfer process. GHPs are efficient and require no backup heat because the earth stays at a relatively moderate temperature throughout the year.

207

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...

208

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...

209

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.

210

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

211

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

212

Feasibility Study of Using Ground Source Heat Pumps in Two Buildings  

E-Print Network (OSTI)

. The building is located near the end of the central steam distribution system. Steam from the central steam and Mt. Olympus BOQ) presently heated by steam from the central steam plant. Ground source heat pump, it was assumed that natural gas-fired water heaters would replace the steam converters that presently provide hot

Oak Ridge National Laboratory

213

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

214

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

215

In the OSTI Collections: Heat Pumps | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

Heat Pumps Heat Pumps Heat-Pump Water Heaters Heat Pumps in Heating, Ventilation, and Air Conditioning Systems References Research Organizations Reports Available through OSTI's Information Bridge The particles of any physical system above absolute zero temperature are always moving. The higher the temperature-that is, the hotter the system-the more energetic the particles' motion. As the particles interact with each other, their random motions tend to redistribute the energy more and more equally among themselves all the time, since there are more ways to distribute energy more evenly than there are to distribute it less evenly. This means that the system's temperature becomes more and more uniform throughout-warmer regions tend to cool, and cooler regions tend to warm, as their particles' random motion flows from where the

216

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.

217

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...

218

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,...

219

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...

220

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...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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...

222

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

223

Geothermal Heat Pumps | Department of Energy  

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

You are here You are here Home » Geothermal Heat Pumps Geothermal Heat Pumps June 24, 2012 - 5:08pm Addthis Watch how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. How does it work? A geothermal heat pump uses the constant below ground temperature of soil or water to heat and cool your home. Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. They use the constant temperature of the earth as the exchange medium instead of the outside air temperature. This allows the system to reach fairly high efficiencies (300% to 600%) on the coldest

224

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

225

Two Stage Vapor Compression Heat Pump with Solution Circuits: Catering to Simultaneous Chilling and Water Heating Needs  

E-Print Network (OSTI)

The benefits of using a two stage vapor compression heat pump with ammonia water solution circuits (VCHSC) to simultaneously provide chilled water for air conditioning and hot water for various uses are reviewed. The performance results for a two stage VCHSC are summarized. Experimental results indicate that the two stage VCHSC can achieve cooling coefficient of performances as high as 1.04 while pumping heat through a lift of 194F (108C). Comparison is made with a system consisting of a vapor compressor chiller and a gas fired furnace. The basis for comparison being primary energy usage, energy cost and initial cost of the systems. Energy saving at various operating conditions is estimated. In some cases, energy saving could be as high as 31%. Based on the national average energy prices in 1991 and the projected prices for 1995, suitable applications for the two stage VCHSC have been identified.

Rane, M. V.; Radermacher, R.

1992-04-01T23:59:59.000Z

226

Northwest Energy Efficiency Alliance - Smart Water Heat Rebate...  

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

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of 750 is...

227

Recovery Act-Funded Water Heating Projects | Department of Energy  

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

of Performance (an efficiency measure) of up to 8. These next generation R-744 heat pump water heaters will be targeted for commercial use where cooling load is...

228

Muscatine Power and Water - Residential Energy Efficiency Rebates...  

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

clothes washers, dryers, ranges, room air and central air conditioners, ground source heat pumps, and water heaters are eligible for this program. The rebate amount...

229

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

230

NREL: Learning - Geothermal Heat Pump Basics  

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

Heat Pump Basics Heat Pump Basics Photo of the West Philadelphia Enterprise Center. The West Philadelphia Enterprise Center uses a geothermal heat pump system for more than 31,000 square feet of space. Geothermal heat pumps take advantage of the nearly constant temperature of the Earth to heat and cool buildings. The shallow ground, or the upper 10 feet of the Earth, maintains a temperature between 50° and 60°F (10°-16°C). This temperature is warmer than the air above it in the winter and cooler in the summer. Geothermal heat pump systems consist of three parts: the ground heat exchanger, the heat pump unit, and the air delivery system (ductwork). The heat exchanger is a system of pipes called a loop, which is buried in the shallow ground near the building. A fluid (usually water or a mixture of

231

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

232

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

233

Ground Loops for Heat Pumps and Refrigeration  

E-Print Network (OSTI)

Ground loops are used for water source heat pumps. Refrigeration can be put on a ground loop. Water-cooled condensing units are more efficient than air-cooled, and they can be put indoors. Indoor location makes piping for desuperheater hot water easy. Since refrigeration equipment runs more than heat pumps, energy savings can be large for ground-coupled refrigeration. The paper presents a design procedure for ground loops for heat pumps, hot water, ice machines, and water-cooled refrigeration. It gives an overview of the commercial ground-coupled systems in Louisiana that have both refrigeration and heat pumps. Systems vary from small offices to a three-story office building with 187 tons. A chain of hamburger outlets uses total ground-coupling in all of its stores. A grocery store has ground-coupling for heat pumps and refrigeration. Desuperheaters provide 80 percent of the hot water for a coin laundry in the same building. A comparison of energy costs in a bank with a ground-coupled heat pump system to a similar bank with air-conditioning and gas for heat revealed a 31 percent reduction in utility costs for the ground-coupled building. Two buildings of the Mississippi Power and Light Co. have ground-coupled heat pumps in one, and high efficiency air source heat pumps in the other. Energy savings in nine months was 60,000 kWh (25 percent), and electric peak demand was reduced 42 kW (35 percent).

Braud, H. J.

1986-01-01T23:59:59.000Z

234

Marietta Power and Water - Residential Energy Efficiency Rebate Program |  

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

Marietta Power and Water - Residential Energy Efficiency Rebate Marietta Power and Water - Residential Energy Efficiency Rebate Program Marietta Power and Water - Residential Energy Efficiency Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate $500 Program Info State Georgia Program Type Utility Rebate Program Rebate Amount Heat Pump: $150 Water Heater: $250 Heat Pump and Water Heater: $500 Provider Marietta Power and Water Marietta Power and Water provides rebates for electric water heaters ($250) and electric and dual-fuel heat pumps ($150). If both a water heater and heat pump are installed simultaneously, a rebate of $500 is available. Electric and dual-fuel heat pumps may be installed in newly constructed

235

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

236

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

237

Geothermal heat pumps in Pierre  

SciTech Connect

There are two municipal connected heat pumps in Pierre, South Dakota: the South Dakota Discovery Center and Pierre City Hall.Both systems now utilize plate heat exchanger between the city water loop and the building loop. This article describes the geothermal system used in Pierre for both space heating and cooling of municipal buildings.

Wegman, S. [South Dakota Public Utilities Commission, Pierre, SD (United States)

1997-12-01T23:59:59.000Z

238

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

239

Rotary magnetic heat pump  

DOE Patents (OSTI)

A rotary magnetic heat pump constructed without flow seals or segmented rotor accomplishes recuperation and regeneration by using split flow paths. Heat exchange fluid pumped through heat exchangers and returned to the heat pump splits into two flow components: one flowing counter to the rotor rotation and one flowing with the rotation.

Kirol, Lance D. (Shelly, ID)

1988-01-01T23:59:59.000Z

240

Rotary magnetic heat pump  

DOE Patents (OSTI)

A rotary magnetic heat pump constructed without flow seals or segmented rotor accomplishes recuperation and regeneration by using split flow paths. Heat exchange fluid pumped through heat exchangers and returned to the heat pump splits into two flow components: one flowing counter to the rotor rotation and one flowing with the rotation. 5 figs.

Kirol, L.D.

1987-02-11T23:59:59.000Z

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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

242

Experimental Research of Air Source Heat Pump Frosting and Defrosting in a Double Stage-Coupling Heat Pump  

E-Print Network (OSTI)

In a double stage-coupling heat pump, comprising an air source and water loop heat pump, the 13~20 ? low temperature water is supplied to the water loop heat pump unit. The water loop heat pump can extract heat from the water and heat the indoor air. The most common method of air source heat pump frost removal is reverse-cycle defrost. During the defrosting operation, the heat pump runs in the cooling mode. The defrost process is accomplished by reversing the normal heating mode. In this paper, the effect of the heat storage tank to the air source heat pump defrosting is test. Owing to the existence of the heat storage tank, thermal inertia of the loop is relatively high. The frosting and defrosting course of the air source heat pump have little effect on the room temperature.

Wang, Z.; Gu, J.; Lu, Z.

2006-01-01T23:59:59.000Z

243

Industrial Heat Pump Case Study  

E-Print Network (OSTI)

An open-cycle heat pump was retrofitted to a single-effect, recirculating-type evaporator used for reducing the water content of whey (a liquid by-product from cheese production). The purpose of the retrofit was to reduce the energy costs associated with operating the evaporator. The open-cycle heat pump design uses an electrically driven centrifugal compressor to recover the latent heat of the water vapor generated by the evaporator. (Steam was the original heat source but is now only needed for start-up.) This concept is sometimes called mechanical vapor compression (MVC) or mechanical vapor recompression (MVR). A variety of engineering issues have to be resolved to integrate a heat pump into an evaporator system. This paper identifies key issues and describes how they were resolved for this particular process. Issues include choice of compressor, motor selection, control strategy, impact of heat pump on heat exchanger surface area requirements and related issues, and methods for protecting the compressor from surge, droplet ingestion, and other hazards.

Wagner, J. R.; Brush, F. C.

1985-05-01T23:59:59.000Z

244

Energy Basics: Heat Pump Systems  

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

of air-source heat pumps. Absorption Heat Pump Uses heat as its energy source. Geothermal Heat Pumps Use the constant temperature of the earth as the exchange medium instead...

245

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

246

Absorption Heat Pumps | Department of Energy  

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

heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most...

247

Solar Colletors Combined with Ground-Source Heat Pumps in Dwellings - Analyses of System Performance.  

E-Print Network (OSTI)

??The use of ground-source heat pumps for heating buildings and domestic hot water in dwellings is increasing rapidly in Sweden. The heat pump extracts heat (more)

Kjellsson, Elisabeth

2009-01-01T23:59:59.000Z

248

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

249

Energy Basics: Geothermal Heat Pumps  

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

EERE: Energy Basics Geothermal Heat Pumps Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country...

250

Heat pumps | Open Energy Information  

Open Energy Info (EERE)

Page Edit History Facebook icon Twitter icon Heat pumps Jump to: navigation, search TODO: Add description List of Heat pumps Incentives Retrieved from "http:en.openei.orgw...

251

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):

252

Geothermal Heat Pumps  

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

Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country experience seasonal temperature extremesfrom scorching heat in...

253

Absorption heat pump system  

DOE Patents (OSTI)

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, Gershon (Oak Ridge, TN)

1984-01-01T23:59:59.000Z

254

Absorption heat pump system  

DOE Patents (OSTI)

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, G.

1982-06-16T23:59:59.000Z

255

Heat Pump Systems  

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

Like a refrigerator, heat pumps use electricity to move heat from a cool space into a warm space, making the cool space cooler and the warm space warmer. Because they move heat rather than generate...

256

Heat Pumps | Department of Energy  

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

Heat Pumps Heat Pumps Heat Pumps Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Learn more about how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. In moderate climates, heat pumps can be an energy-efficient alternative to furnaces and air conditioners. Several types of heat pumps are available, including air-source; geothermal; ductless, mini-split; and absorption heat pumps. Learn more about the different options and how to use your heat pump efficiently to save money and energy at home. Featured Heat Pump Systems A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar.

257

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

258

Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes: Tucson, Arizona and Chico, California (Fact Sheet)  

SciTech Connect

Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

Not Available

2013-11-01T23:59:59.000Z

259

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

260

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...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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...

262

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%...

263

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...

264

Mechanical Compression Heat Pumps  

E-Print Network (OSTI)

Mechanical compression heat pumping is not new in industrial applications. In fact, industry history suggests that the theoretical concept was developed before 1825. Heat pump manufacturers gained the support of consultants and end-users when the energy crisis hit this country in 1973. That interest, today, has been dampened because there is a current abundance of the basic sources of industrial energy (namely oil and natural gas). Meanwhile, Mycom used the window of the current opportunities to develop, design and test compressors built to meet the needs of the mechanically demanding industrial heat pump applications which often require high compression ratios and temperatures in excess of 200 degrees F. This paper will review the theoretical foundation for heat pumps and present the mechanical and thermal requirements of the compressors which constitute the heart and soul of the system. It will also provide a quick survey of the available types of compressors for heat pumping and some of the industrial processes where simultaneous heating and cooling proceed along parallel demand paths. The case history will examine the system flexibility and the economic advantages realized in a barley malting process.

Apaloo, T. L.; Kawamura, K.; Matsuda, J.

1986-06-01T23:59:59.000Z

265

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

266

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

267

Field and Laboratory Study of a Ground-Coupled Water Source Heat Pump with an Integral Enthalpy Exchange System for Classrooms  

E-Print Network (OSTI)

School classroom space-conditioning equipment in hot and humid climates is often excessively burdened by the requirement to dehumidify incoming air to maintain proper thermal comfort and air quality. To that end, application of new or modified technologies is needed to increase the dehumidification abilities of equipment without compromising energy efficiency or the need for fresh ventilation air. To study the effectiveness of integrated heat pump and enthalpy exchange equipment, a nominal 4-ton water-source heat pump, coupled with a geothermal water loop and incorporating a forced fresh-air enthalpy exchange system was installed in a typical middle school classroom in Oak Ridge, Tennessee. This project is a joint effort among Oak Ridge School District, Tennessee Valley Authority, Energy Office of the State of Tennessee, and Oak Ridge National Laboratory. The retrofit classroom, along with a similar baseline classroom (employing a water source heat pump supplied by a boiler/cooling tower loop), were instrumented with an Internet-based system to control and monitor performance, efficiency, and a variety of air states. Those include classroom air, outdoor air, semi-conditioned fresh air, and supply air. Particular attention was dedicated to the humidity content and the carbon dioxide content of conditioned space (classroom) air and to the intake rate of forced fresh air. This field study builds on a previous laboratory study of a water-source heat pump coupled to an enthalpy recovery system. The laboratory work showed good potential for reducing the moisture load from forced ventilation air. At simulated outdoor conditions of 90F (32.2C) and 90% RH, the enthalpy recovery wheel in the nominal 2-ton system was able to capture and exhaust 9.9 lb of moisture that would otherwise have to be handled solely by the cooling coil.

Domitrovic, R.; Hayzen, G. J.; Johnson, W. S.; Chen, F. C.

2002-01-01T23:59:59.000Z

268

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

269

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...

270

Field Test of High Efficiency Residential Buildings with Ground-source and Air-source Heat Pump Systems  

SciTech Connect

This paper describes the field performance of space conditioning and water heating equipment in four single-family residential structures with advanced thermal envelopes. Each structure features a different, advanced thermal envelope design: structural insulated panel (SIP); optimum value framing (OVF); insulation with embedded phase change materials (PCM) for thermal storage; and exterior insulation finish system (EIFS). Three of the homes feature ground-source heat pumps (GSHPs) for space conditioning and water heating while the fourth has a two-capacity air-source heat pump (ASHP) and a heat pump water heater (HPWH). Two of the GCHP-equipped homes feature horizontal ground heat exchange (GHX) loops that utillize the existing foundation and utility service trenches while the third features a vertical borehole with vertical u-tube GHX. All of the houses were operated under the same simulated occupancy conditions. Operational data on the house HVAC/Water heating (WH) systems are presented and factors influencing overall performance are summarized.

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

2011-01-01T23:59:59.000Z

271

Alabama Power - Residential Heat Pump and Weatherization Loan Programs |  

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

Alabama Power - Residential Heat Pump and Weatherization Loan Alabama Power - Residential Heat Pump and Weatherization Loan Programs Alabama Power - Residential Heat Pump and Weatherization Loan Programs < Back Eligibility Residential Savings Category Home Weatherization Commercial Weatherization Sealing Your Home Design & Remodeling Windows, Doors, & Skylights Ventilation Heating & Cooling Commercial Heating & Cooling Heat Pumps Appliances & Electronics Water Heating Maximum Rebate Windows: $350 Program Info State Alabama Program Type Utility Loan Program Rebate Amount Not specified Provider Alabama Power Alabama Power offers low-interest loans to residential customers to purchase and install new heat pumps and a variety of weatherization measures. The loans require no money down and can be used to finance an air

272

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

273

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

274

Comparison of Advanced Residential Water Heating Technologies in the United States  

SciTech Connect

Gas storage, gas tankless, condensing, electric storage, heat pump, and solar water heaters were simulated in several different climates across the US installed in both conditioned and unconditioned space and subjected to several different draw profiles. While many preexisting models were used, new models of condensing and heat pump water heaters were created specifically for this work.

Maguire, J.; Fang, X.; Wilson, E.

2013-05-01T23:59:59.000Z

275

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 ...

276

New and Underutilized Technology: Commercial Ground Source Heat Pumps |  

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

Commercial Ground Source Heat Commercial Ground Source Heat Pumps New and Underutilized Technology: Commercial Ground Source Heat Pumps October 8, 2013 - 2:59pm Addthis The following information outlines key deployment considerations for commercial ground source heat pumps within the Federal sector. Benefits Commercial ground source heat pumps are ground source heat pump with loops that feed multiple packaged heat pumps and a single ground source water loop. Unit capacity is typically 1-10 tons and may be utilized in an array of multiple units to serve a large load. Application Condensing boilers are appropriate for housing, service, office, and research and development applications. Key Factors for Deployment FEMP has made great progress with commercial ground source heat pump technology deployment within the Federal sector. Primary barriers deal with

277

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

278

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

279

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:

280

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Facility HVAC System Conversion to Ground Source Heat Pump Geothermal...  

Open Energy Info (EERE)

ventilators will utilize the hot water to "temper" outdoor air ventilation. Although the heat pump modules can provide both heating and cooling, the space requires heating only....

282

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

283

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

284

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

285

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

286

Hydride heat pump  

DOE Patents (OSTI)

Method and apparatus for the use of hydrides to exhaust heat from one temperature source and deliver the thermal energy extracted for use at a higher temperature, thereby acting as a heat pump. For this purpose there are employed a pair of hydridable metal compounds having different characteristics working together in a closed pressure system employing a high temperature source to upgrade the heat supplied from a low temperature source.

Cottingham, James G. (Center Moriches, NY)

1977-01-01T23:59:59.000Z

287

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

288

Thermally activated heat pumps  

SciTech Connect

This article describes research to develop efficient gas-fired heat pumps heat and cool buildings without CFCs. Space heating and cooling use 46% of all energy consumed in US buildings. Air-conditioning is the single leading cause of peak demand for electricity and is a major user of chlorofluorocarbons (CFCs). Advanced energy conversion technology can save 50% of this energy and eliminate CFCs completely. Besides saving energy, advanced systems substantially reduce emissions of carbon dioxide (a greenhouse gas), sulfur dioxide, and nitrogen oxides, which contribute to smog and acid rain. These emissions result from the burning of fossil fuels used to generate electricity. The Office of Building Technologies (OBT) of the US Department of Energy supports private industry`s efforts to improve energy efficiency and increase the use of renewable energy in buildings. To help industry, OBT, through the Oak Ridge National Laboratory, is currently working on thermally activated heat pumps. OBT has selected the following absorption heat pump systems to develop: generator-absorber heat-exchange (GAX) cycle for heating-dominated applications in residential and light commercial buildings; double-condenser-coupled (DCC) cycle for commercial buildings. In addition, OBT is developing computer-aided design software for investigating the absorption cycle.

NONE

1995-05-01T23:59:59.000Z

289

Industrial and Commercial Heat Pump Applications in the United States  

E-Print Network (OSTI)

The energy crisis of 1973 accelerated the development of large-scale heat pumps in the United States. Since that time, the commercial, institutional, and industrial applications of heat pumps for waste heat recovery have expanded. This paper reviews the trends in heat pump cycle developments and discusses both the closed vapor compression cycle and refrigerants most commonly used and the open-cycle mechanical vapor compression heat pumps. Waste heat sources, heat loads served by heat pumps--and typical applications using heat pumps for large-scale space heating, domestic water heating, and industrial process water heating-- are discussed. Typical installations include commercial applications in hotels, high-rise apartments and condominiums, and office buildings. Institutional installations discussed include hospitals, universities, wastewater treatment plants, and airport terminals. Industrial applications largely center on food processing industries, feedwater heating, metal fabricating, and other industries. Reference is also made to other applications and alternative energy sources now gaining acceptance, including groundwater/geothermal water.

Niess, R. C.

1986-06-01T23:59:59.000Z

290

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...

291

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...

292

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...

293

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;

294

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

295

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.

296

Chemical heat pump  

DOE Patents (OSTI)

A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer. The heat pump part of the system heats or cools a house or other structure through a combination of evaporation and absorption or, conversely, condensation and desorption, in a pair of containers. A set of automatic controls change the system for operation during winter and summer months and for daytime and nighttime operation to satisfactorily heat and cool a house during an entire year. The absorber chamber is subjected to solar heating during regeneration cycles and is covered by one or more layers of glass or other transparent material. Daytime home air used for heating the home is passed at appropriate flow rates between the absorber container and the first transparent cover layer in heat transfer relationship in a manner that greatly reduce eddies and resultant heat loss from the absorbant surface to ambient atmosphere.

Greiner, Leonard (2750-C Segerstrom Ave., Santa Ana, CA 92704)

1980-01-01T23:59:59.000Z

297

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

298

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

299

Absorption heat pump system  

DOE Patents (OSTI)

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, Gershon (Oak Ridge, TN); Perez-Blanco, Horacio (Knoxville, TN)

1984-01-01T23:59:59.000Z

300

Acoustical heat pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.

Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Los Alamos, NM); Migliori, Albert (Santa Fe, NM)

1983-08-16T23:59:59.000Z

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Acoustical heat pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium. 2 figs.

Wheatley, J.C.; Swift, G.W.; Migliori, A.

1983-08-16T23:59:59.000Z

302

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...

303

Evaluation of an Absorption Heat Pump to Mitigate Plant Capacity Reduction Due to Ambient Temperature Rise for an Air-Cooled Ammonia and Water Cycle: Preprint  

DOE Green Energy (OSTI)

Air-cooled geothermal plants suffer substantial decreases in generating capacity at increased ambient temperatures. As the ambient temperature rises by 50 F above a design value of 50 F, at low brine-resource temperatures, the decrease in generating capacity can be more than 50%. This decrease is caused primarily by increased condenser pressure. Using mixed-working fluids has recently drawn considerable attention for use in power cycles. Such cycles are more readily amenable to use of absorption ''heat pumps.'' For a system that uses ammonia and water as the mixed-working fluid, this paper evaluates using an absorption heat pump to reduce condenser backpressure. At high ambient temperatures, part of the turbine exhaust vapor is absorbed into a circulating mixed stream in an absorber in series with the main condenser. This steam is pumped up to a higher pressure and heated to strip the excess vapor, which is recondensed using an additional air-cooled condenser. The operating conditions are chosen to reconstitute this condensate back to the same concentration as drawn from the original system. We analyzed two power plants of nominal 1-megawatt capacity. The design resource temperatures were 250 F and 300 F. Ambient temperature was allowed to rise from a design value of 50 F to 100 F. The analyses indicate that using an absorption heat pump is feasible. For the 300 F resource, an increased brine flow of 30% resulted in a net power increase of 21%. For the 250 F resource, the increase was smaller. However, these results are highly plant- and equipment-specific because evaluations must be carried out at off-design conditions for the condenser. Such studies should be carried out for specific power plants that suffer most from increased ambient temperatures.

Bharathan, D.; Nix, G.

2001-08-06T23:59:59.000Z

304

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

305

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

306

Chemical heat pump  

DOE Patents (OSTI)

A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to faciliate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

Greiner, Leonard (2853-A Hickory Pl., Costa Mesa, CA 92626)

1984-01-01T23:59:59.000Z

307

Chemical heat pump  

DOE Patents (OSTI)

A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate intallation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

Greiner, Leonard (2853-A Hickory Pl., Costa Mesa, CA 92626)

1984-01-01T23:59:59.000Z

308

Chemical heat pump  

DOE Patents (OSTI)

A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

Greiner, Leonard (2853-A Hickory Pl., Costa Mesa, CA 92626)

1981-01-01T23:59:59.000Z

309

Chemical heat pump  

DOE Patents (OSTI)

A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

Greiner, Leonard (2853-A Hickory Pl., Costa Mesa, CA 92626)

1984-01-01T23:59:59.000Z

310

Heat pump apparatus  

DOE Patents (OSTI)

A heat pump apparatus including a compact arrangement of individual tubular reactors containing hydride-dehydride beds in opposite end sections, each pair of beds in each reactor being operable by sequential and coordinated treatment with a plurality of heat transfer fluids in a plurality of processing stages, and first and second valves located adjacent the reactor end sections with rotatable members having multiple ports and associated portions for separating the hydride beds at each of the end sections into groups and for simultaneously directing a plurality of heat transfer fluids to the different groups. As heat is being generated by a group of beds, others are being regenerated so that heat is continuously available for space heating. As each of the processing stages is completed for a hydride bed or group of beds, each valve member is rotated causing the heat transfer fluid for the heat processing stage to be directed to that bed or group of beds. Each of the end sections are arranged to form a closed perimeter and the valve member may be rotated repeatedly about the perimeter to provide a continuous operation. Both valves are driven by a common motor to provide a coordinated treatment of beds in the same reactors. The heat pump apparatus is particularly suitable for the utilization of thermal energy supplied by solar collectors and concentrators but may be used with any source of heat, including a source of low-grade heat.

Nelson, Paul A. (Wheaton, IL); Horowitz, Jeffrey S. (Woodridge, IL)

1983-01-01T23:59:59.000Z

311

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

312

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

313

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

314

Heat Pumps | Department of Energy  

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

existing heat contained within the earth -- a clean, reliable, and renewable source of energy. In moderate climates, heat pumps can be an energy-efficient alternative to furnaces...

315

Save by absorption heat pumping  

SciTech Connect

The author compares absorption heat pumping (AHP) to mechanical vapor compressor (MVC) heat pumping. The moving part of the AHP is a pump easy to maintain and inexpensive to spare. The mechanical component of the MVC is a vapor compressor which requires more maintenance and is cost-prohibitive to spare. Also, in the MVC system, a purified product stream is heat pumped in an open compressor, thus risking product contamination. In the AHP system, the cold and hot utilities are heat pumped. Therefore, product integrity with an AHP system is well protected as in a conventional fractionation column.

Davidson, W.F.; Campagne, W.V.L.

1987-12-01T23:59:59.000Z

316

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

317

Experimental Investigation of the Effect Of Zeolite Coating Thickness on the Performance of a Novel Zeolite-Water Adsorption Heat Pump Module  

E-Print Network (OSTI)

A novel zeolite-water absorption heat pump module comprising an adsorber, an evaporator and a condenser heat exchanger as well as a module non-return valve in a hermetically sealed vessel is introduced. The investigated adsorber heat exchanger is an extruded aluminum finned-tube heat exchanger coated with AQSOA-Z02 zeolite of Mitsubishi Plastics Incorporation (MPI). The effect of the Zeolite layer thickness (300 and 500 micrometers) on the performance of the heat pump module has been experimentally investigated under different operating conditions related to floor heating systems in Middle Europe. A coefficient of performance (COP) of 1.18 has been measured with the 300 micrometers coated adsorber at a return temperature of 35 C, increasing 1.23 at a return temperature of 25 C. With the 500 micrometer coated adsorber, the measured COPs have been enhanced to 1.27 and 1.35, respectively. This enhancement has been attributed to the increase of the ration between zeolite and heat exchanger heat capacities.

Dawoud, B.; Hofle, P.; Chmielewski, S.

2010-01-01T23:59:59.000Z

318

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

319

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

320

Dual source heat pump  

DOE Patents (OSTI)

What is disclosed is a heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating the fluid in heat exchange relationship with a refrigerant fluid; at least two refrigerant heat exchangers, one for effecting heat exchange with the fluid and a second for effecting heat exchange between refrigerant and a heat exchange fluid and the ambient air; a compressor for efficiently compressing the refrigerant; at least one throttling valve for throttling liquid refrigerant; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circulating device and heat exchange fluid circuit for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and direction of flow of the refrigerant therethrough for selecting a particular mode of operation. The heat exchange fluid provides energy for defrosting the second heat exchanger when operating in the air source mode and also provides a alternate source of heat.

Ecker, Amir L. (Dallas, TX); Pietsch, Joseph A. (Dallas, TX)

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Multiple source heat pump  

DOE Patents (OSTI)

A heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating a fluid in heat exchange relationship with a refrigerant fluid, at least three refrigerant heat exchangers, one for effecting heat exchange with the fluid, a second for effecting heat exchange with a heat exchange fluid, and a third for effecting heat exchange with ambient air; a compressor for compressing the refrigerant; at least one throttling valve connected at the inlet side of a heat exchanger in which liquid refrigerant is vaporized; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circuit and pump for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and directional flow of refrigerant therethrough for selecting a particular mode of operation. Also disclosed are a variety of embodiments, modes of operation, and schematics therefor.

Ecker, Amir L. (Duncanville, TX)

1983-01-01T23:59:59.000Z

322

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...

323

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):...

324

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...

325

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

326

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

327

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

328

Proceedings: Meeting Customer Needs With Heat Pumps--1989  

Science Conference Proceedings (OSTI)

Electric heat pumps provide a growing number of satisfied customers with space heating and cooling, humidity control, and water heating. Today's increasingly efficient heat pumps emphasize customer comfort and economy and help utilities satisfy their load-shape objectives in an environmentally acceptable manner.

1991-02-27T23:59:59.000Z

329

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

330

GEOTHERMAL HEAT PUMP GROUTING MATERIALS  

DOE Green Energy (OSTI)

The thermal conductivity of cementitious grouts has been investigated in order to determine suitability of these materials for grouting vertical boreholes used with geothermal heat pumps. The roles of mix variables such as water/cement ratio, sand/cement ratio and superplasticizer dosage were measured. The cement-sand grouts were also tested for rheological characteristics, bleeding, permeability, bond to HDPE pipe, shrinkage, coefficient of thermal expansion, exotherm, durability and environmental impact. This paper summarizes the thermal conductivity, permeability, bonding and exotherm data for selected cementitious grouts. The theoretical reduction in bore length that could be achieved with the BNL-developed cement-sand grouts is examined. Finally, the FY 98 research and field trials are discussed.

ALLAN,M.

1998-04-01T23:59:59.000Z

331

Geothermal heat pump grouting materials  

Science Conference Proceedings (OSTI)

The thermal conductivity of cementitious grouts has been investigated in order to determine suitability of these materials for grouting vertical boreholes used with geothermal heat pumps. The roles of mix variables such as water/cement ratio, sand/cement ratio and superplasticizer dosage were measured. The cement-sand grouts were also tested for rheological characteristics, bleeding, permeability, bond to HDPE pipe, shrinkage, coefficient of thermal expansion, exotherm, durability and environmental impact. This paper summarizes the thermal conductivity, permeability, bonding and exotherm data for selected cementitious grouts. The theoretical reduction in bore length that could be achieved with the BNL-developed cement-sand grouts is examined. Finally, the FY 98 research and field trials are discussed.

Allan, M.

1998-08-01T23:59:59.000Z

332

Heat Pumps in Distillation Processes  

Science Conference Proceedings (OSTI)

Both new and retrofit heat pump installations are often economically justifiable for distillation columns with a temperature differential of 50 degrees F or less. However, this study reveals that the near-term demand for electric heat pumps in petroleum and chemical distillation processes appears very limited.

1984-08-01T23:59:59.000Z

333

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.

334

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.

335

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

336

Testing of Crystallization Temperature of a New Working Fluid for Absorption Heat Pump Systems  

SciTech Connect

Lithium bromide/water (LiBr/water) absorption systems are potential candidates for absorption heat pump water heating applications since they have been widely commercialized for cooling applications. One drawback to LiBr/water absorption water heater systems is that they are unable to operate at typical water heating temperatures due to solution crystallization hazards. Binary or ternary mixtures, serving as working fluids, were reported (Ally, 1988; Herold et al., 1991; Iyoki and Uemura, 1981; Yasuhide Nemoto et al., 2010; Zogg et al., 2005) to help improve the absorption performance or avoid crystallization of absorption heat pump systems. A recent development (De Lucas et al., 2007) investigated the use of a ternary mixture of aqueous mixture of lithium bromide and sodium formate (CHO2Na). The new working fluid composition maintains a ratio of LiBr/CHO2Na of 2 by weight. This new working fluid is a potential competitor to aqueous LiBr solution in absorption system due to higher water vapor absorption rates and lower generation temperature needed (De Lucas et al., 2004). There exists data on equilibrium performance and other physical properties of this new working fluid. However, there is no available data on crystallization behavior. Crystallization temperature is crucial for the design of absorption heat pump water heater in order to avoid crystallization hazards during operation. We have therefore conducted a systematic study to explore the crystallization temperature of LiBr/CHO2Na water solution and compared it against aqueous LiBr solutions. These results were then used to evaluate the feasibility of using the new working fluid in water heating applications showing limited potential.

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

2010-01-01T23:59:59.000Z

337

Max Tech and Beyond: Maximizing Appliance and Equipment Efficiency by Design  

E-Print Network (OSTI)

initial costs. Absorption heat pump water heaters (which usereliable absorption heat pump water heaters. Solar thermal

Desroches, Louis-Benoit

2012-01-01T23:59:59.000Z

338

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

339

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.

340

Modeling and Experimental Research on Ground-Source Heat Pump in Operation by Neural Network  

Science Conference Proceedings (OSTI)

Ground source Heat Pump(GSHP) is becoming the more and more focus of the worlds attention as a HVAC technique of energy saving and environment protection. This paper first introduced the experiment for Ground-Source water/water Heat Pump. The heat ... Keywords: Ground-Source Heat Pump(GSHP), Neural Network(NN) Predication modeling

Jianping Chen; Zhiwei Lian; Lizheng Tan; Weifeng Zhu; Weiqiang Zhang

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Geothermal Heat Pumps | Department of Energy  

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

Geothermal Heat Pumps Geothermal Heat Pumps August 19, 2013 - 11:12am Addthis Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat....

342

Efficiency of unitary heat pumps  

SciTech Connect

The efficiencies of approximately 500 unitary heat pumps, from 30 different manufacturers, certified by the Air Conditioning and Refrigeration Institute (ARI) were examined. The certified units account for about 90% of all unitary heat pumps manufactured in the U.S. with a rated cooling capacity below 135,000 Btu/hr, and thus represent a comprehensive data file of the efficiencies of unitary heat pumps offered for sale in the U.S. A computer was used to group the heat pumps according to type and capacity, and to calculate their coefficients of performance (COP) using the data contained in ARI current Directory (April 1 to July 31, 1973) of Certified Unitary Heat Pumps. The results show that the COP of the heat pumps varied from a low of 1.5 to a high of 3.15 or a factor of 2 between the lowest and the highest efficiency, and that the average COP was 2.1 in cooling and 2.4 in heating. The variations of COP with heat pump size, type, manufacturer and outdoor temperature are presented.

Nwude, J.K.; Roman, A.J.

1973-11-01T23:59:59.000Z

343

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

344

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

345

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...

346

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...

347

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...

348

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...

349

Geothermal Heat Pumps Tech Update  

Science Conference Proceedings (OSTI)

Geothermal heat pumps (GHPs; a.k.a. Ground Source Heat Pumps or GHPSM) can successfully compete with air source heat pump in performance due to their use of the ground or groundwater as a heat source or heat sink. In 1993, the U.S. Environmental Protection Agency labeled GHPs as the most energy efficient, cost-effective and environmentally clean space conditioning technology available. The U.S. Department of Energy, Federal Energy Management Program attested that GHPs are a highly efficient method of ...

2008-12-19T23:59:59.000Z

350

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

351

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

352

Energy 101: Geothermal Heat Pumps | Department of Energy  

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

Energy 101: Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps January 4, 2011 - 12:15pm Addthis An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together. John Schueler John Schueler Former New Media Specialist, Office of Public Affairs Quick Facts Heat pump systems can lower energy bills by up to 70% over traditional types of heating systems. During this time of year, many homeowners are searching for ways to reduce steep heating costs. One of the options they should consider during the

353

Energy 101: Geothermal Heat Pumps | Department of Energy  

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

Energy 101: Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps January 4, 2011 - 12:15pm Addthis An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together. John Schueler John Schueler Former New Media Specialist, Office of Public Affairs Quick Facts Heat pump systems can lower energy bills by up to 70% over traditional types of heating systems. During this time of year, many homeowners are searching for ways to reduce steep heating costs. One of the options they should consider during the

354

Energy 101: Geothermal Heat Pumps | Department of Energy  

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

Geothermal Heat Pumps Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps Addthis Description An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together. Duration 2:32 Topic Tax Credits, Rebates, Savings Heating & Cooling Geothermal Consumption Credit Energy Department Video MR. : We all want to save money heating or cooling our house or office, right? The answer may be under your feet, literally. Much of the heating and cooling can come from the ground, below the surface, with something called a geothermal heat pump. You see, below the frost line

355

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.

356

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

357

FEMP--Geothermal Heat Pumps  

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

conditioner or refrigera- tor-moves heat from one place to another. In the summer, a geothermal heat pump (GHP) operating in a cooling mode lowers indoor temperatures by...

358

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

359

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

360

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Heat Pump System Basics | Department of Energy  

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

Heat Pump System Basics Heat Pump System Basics Heat Pump System Basics August 19, 2013 - 11:02am Addthis Like a refrigerator, heat pumps use electricity to move heat from a cool space into a warm space, making the cool space cooler and the warm space warmer. Because they move heat rather than generate heat, heat pumps can provide up to four times the amount of energy they consume. Air-Source Heat Pump Transfers heat between the inside of a building and the outside air. Ductless Mini-Split Heat Pump Ductless versions of air-source heat pumps. Absorption Heat Pump Uses heat as its energy source. Geothermal Heat Pumps Use the constant temperature of the earth as the exchange medium instead of the outside air temperature. Addthis Related Articles A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar.

362

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

363

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

364

Ground-Source Heat Pumps Applied to Commercial Buildings  

SciTech Connect

Ground-source heat pumps can provide an energy-efficient, cost-effective way to heat and cool commercial facilities. While ground-source heat pumps are well established in the residential sector, their application in larger, commercial-style, facilities is lagging, in part because of a lack of experience with the technology by those in decision-making positions. Through the use of a ground-coupling system, a conventional water-source heat pump design is transformed to a unique means of utilizing thermodynamic properties of earth and groundwater for efficient operation throughout the year in most climates. In essence, the ground (or groundwater) serves as a heat source during winter operation and a heat sink for summer cooling. Many varieties in design are available, so the technology can be adapted to almost any site. Ground-source heat pump systems can be used widely in commercial-building applications and, with proper installation, offer great potential for the commercial sector, where increased efficiency and reduced heating and cooling costs are important. Ground-source heat pump systems require less refrigerant than conventional air-source heat pumps or air-conditioning systems, with the exception of direct-expansion-type ground-source heat pump systems. This chapter provides information and procedures that an energy manager can use to evaluate most ground-source heat pump applications. Ground-source heat pump operation, system types, design variations, energy savings, and other benefits are explained. Guidelines are provided for appropriate application and installation. Two case studies are presented to give the reader a sense of the actual costs and energy savings. A list of manufacturers and references for further reading are included for prospective users who have specific or highly technical questions not fully addressed in this chapter. Sample case spreadsheets are provided in Appendix A. Additional appendixes provide other information on the ground-source heat pump technology.

Parker, Steven A.; Hadley, Donald L.

2006-12-31T23:59:59.000Z

365

Ground-source Heat Pumps Applied to Commercial Buildings  

SciTech Connect

Ground-source heat pumps can provide an energy-efficient, cost-effective way to heat and cool commercial facilities. While ground-source heat pumps are well established in the residential sector, their application in larger, commercial-style, facilities is lagging, in part because of a lack of experience with the technology by those in decision-making positions. Through the use of a ground-coupling system, a conventional water-source heat pump design is transformed to a unique means of utilizing thermodynamic properties of earth and groundwater for efficient operation throughout the year in most climates. In essence, the ground (or groundwater) serves as a heat source during winter operation and a heat sink for summer cooling. Many varieties in design are available, so the technology can be adapted to almost any site. Ground-source heat pump systems can be used widely in commercial-building applications and, with proper installation, offer great potential for the commercial sector, where increased efficiency and reduced heating and cooling costs are important. Ground-source heat pump systems require less refrigerant than conventional air-source heat pumps or air-conditioning systems, with the exception of direct-expansion-type ground-source heat pump systems. This chapter provides information and procedures that an energy manager can use to evaluate most ground-source heat pump applications. Ground-source heat pump operation, system types, design variations, energy savings, and other benefits are explained. Guidelines are provided for appropriate application and installation. Two case studies are presented to give the reader a sense of the actual costs and energy savings. A list of manufacturers and references for further reading are included for prospective users who have specific or highly technical questions not fully addressed in this chapter. Sample case spreadsheets are provided in Appendix A. Additional appendixes provide other information on the ground-source heat pump technology.

Parker, Steven A.; Hadley, Donald L.

2009-07-14T23:59:59.000Z

366

Going Ductless with Heat Pumps | Department of Energy  

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

Going Ductless with Heat Pumps Going Ductless with Heat Pumps Going Ductless with Heat Pumps November 2, 2009 - 9:06am Addthis John Lippert My home, unlike most homes in the United States, has no ducts. My wife and I bought the house nearly 20 years ago. Window air conditioners provided air conditioning during the hot muggy Washington, D.C., summers. Baseboard electric heaters provided heating in winter. Before a lot of you post your sympathies in the comments, let me say this: my house is well insulated and very air tight, as a whole house energy audit demonstrated about 15 years ago. Yet, even though electric baseboard heating is about 100% efficient, it is a costly way of heating a house. And as I got older, each year I enjoyed installing and removing the window air conditioners less and less.

367

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

368

Northwest Energy Efficiency Alliance - Smart Water Heat Rebate...  

Open Energy Info (EERE)

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of 1,000 is...

369

Ground Source Heat Pumps | Open Energy Information  

Open Energy Info (EERE)

Ground Source Heat Pumps Ground Source Heat Pumps (Redirected from Geothermal Heat Pumps) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Ground Source Heat Pumps Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps GSHP Links Related documents and websites An Information Survival Kit for the Prospective Geothemral Heat Pump Owner List of Heat Pumps Incentives List of Ground Source Heat Pumps Incentives Policy Makers' Guidebook for Geothermal Heating and Cooling Various ways to configure a geothermal heat pump system. (Source: The Geo-Heat Center's Survival Kit for the Prospective Geothemral Heat Pump

370

Measured Performance and Analysis of Ground Source Heat Pumps for Space Conditioning and for Water Heating in a Low-Energy Test House Operated under Simulated Occupancy Conditions  

Science Conference Proceedings (OSTI)

In this paper we present measured performance and efficiency metrics of Ground Source Heat Pumps (GSHPs) for space conditioning and for water heating connected to a horizontal ground heat exchanger (GHX) loop. The units were installed in a 345m2 (3700ft2) high-efficiency test house built with structural insulated panels (SIPs), operated under simulated occupancy conditions, and located in Oak Ridge, Tennessee (USA) in US Climate Zone 4 . The paper describes distinctive features of the building envelope, ground loop, and equipment, and provides detailed monthly performance of the GSHP system. Space conditioning needs of the house were completely satisfied by a nominal 2-ton (7.0 kW) water-to-air GSHP (WA-GSHP) unit with almost no auxiliary heat usage. Recommendations for further improvement through engineering design changes are identified. The comprehensive set of data and analyses demonstrate the feasibility and practicality of GSHPs in residential applications and their potential to help achieve source energy and greenhouse gas emission reduction targets set under the IECC 2012 Standard.

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

2012-01-01T23:59:59.000Z

371

Thermoeconomic Analysis of a Solar Heat-Pump System  

E-Print Network (OSTI)

This paper introduces a solar energy heat-pump system and analyzes the thermoeconomics. The results show that the solar energy heat-pump system can be operated in different modes and used for room heating in winter and cooling in summer and/or heating a hot water supply. The results also show that the efficiency of the system's components and how the investment costs greatly affect the wide acceptability and use of the system. Solar energy is clean and renewable and having not to pay the solar energy costs, the solar energy heat-pump system is still attractive and will have a large market.

Gao, Y.; Wang, S.

2006-01-01T23:59:59.000Z

372

Gas Swimming Pool Heaters | Department of Energy  

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

can be a good choice for pools that aren't used on a regular basis. Unlike heat pump and solar pool heaters, gas pool heaters can maintain any desired temperature regardless of...

373

heat pump | OpenEI  

Open Energy Info (EERE)

heat pump heat pump Dataset Summary Description View 2010 energy efficiency data from AeroSys Inc, Coaire, Cold Point, First Operations, LG Electronics, Nordyne, and Quietside manufacturers. Data includes cooling capacity, cooling performance, heating capacity, and heating performance. Spreadsheet was created by combining the tables in pdf files that are included in the zip file. Source Energy Applicance Data - United States Federal Trade Commission, www.ftc.gov Date Released Unknown Date Updated Unknown Keywords air conditioner central air conditioner efficiency efficient energy heat pump Data application/vnd.ms-excel icon 2010_CentralAC_All.xls (xls, 82.4 KiB) application/zip icon 2010CentralAirConditioner.zip (zip, 398.2 KiB) Quality Metrics Level of Review Some Review

374

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

375

Simulation and performance analysis of an ammonia-water absorption heat pump based on the generator-absorber heat exchange (GAX) cycle  

Science Conference Proceedings (OSTI)

A computer simulation has been conducted to investigate the performance of an absorption heat pump, based on the Generator-Absorber Heat Exchange (GAX) cycle employing ammonia-water as the working fluid pair. The particular feature of this cycle is the ability to recover heat from the absorber and employ it to partially heat the generator, thus improving the COP. In the present study, a detailed simulation has been conducted of one of the preferred configurations for the cycle. A modular computer code for flexible simulation of absorption systems (ABSIM) was employed. Performance parameters, including COP and capacity, were investigated as functions of different operating parameters over a wide range of conditions in both the cooling and heating mode. The effect of the ambient temperature, the rectifier performance, the flowrate in the GAX heat transfer loop and the refrigerant flow control were investigated. COP`s on the order of 1.0 for cooling and 2.0 for heating have been calculated.

Grossman, G. [Israel Institute of Technology, Haifa (Israel); DeVault, R.C.; Creswick, F.A. [Oak Ridge National Lab., TN (United States)

1995-02-01T23:59:59.000Z

376

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...

377

Ground Source Heat Pumps | Open Energy Information  

Open Energy Info (EERE)

Ground Source Heat Pumps Ground Source Heat Pumps Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Ground Source Heat Pumps Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps GSHP Links Related documents and websites An Information Survival Kit for the Prospective Geothemral Heat Pump Owner List of Heat Pumps Incentives List of Ground Source Heat Pumps Incentives Policy Makers' Guidebook for Geothermal Heating and Cooling Various ways to configure a geothermal heat pump system. (Source: The Geo-Heat Center's Survival Kit for the Prospective Geothemral Heat Pump

378

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.

379

Ground Source Integrated Heat Pump (GS-IHP) Development  

SciTech Connect

Between October 2008 and May 2013 ORNL and ClimateMaster, Inc. (CM) engaged in a Cooperative Research and Development Agreement (CRADA) to develop a groundsource integrated heat pump (GS-IHP) system for the US residential market. A initial prototype was designed and fabricated, lab-tested, and modeled in TRNSYS (SOLAR Energy Laboratory, et al, 2010) to predict annual performance relative to 1) a baseline suite of equipment meeting minimum efficiency standards in effect in 2006 (combination of air-source heat pump (ASHP) and resistance water heater) and 2) a state-of-the-art (SOA) two-capacity ground-source heat pump with desuperheater water heater (WH) option (GSHPwDS). Predicted total annual energy savings, while providing space conditioning and water heating for a 2600 ft{sup 2} (242 m{sup 2}) house at 5 U.S. locations, ranged from 52 to 59%, averaging 55%, relative to the minimum efficiency suite. Predicted energy use for water heating was reduced 68 to 78% relative to resistance WH. Predicted total annual savings for the GSHPwDS relative to the same baseline averaged 22.6% with water heating energy use reduced by 10 to 30% from desuperheater contributions. The 1st generation (or alpha) prototype design for the GS-IHP was finalized in 2010 and field test samples were fabricated for testing by CM and by ORNL. Two of the alpha units were installed in 3700 ft{sup 2} (345 m{sup 2}) houses at the ZEBRAlliance site in Oak Ridge and field tested during 2011. Based on the steady-state performance demonstrated by the GS-IHPs it was projected that it would achieve >52% energy savings relative to the minimum efficiency suite at this specific site. A number of operational issues with the alpha units were identified indicating design changes needed to the system before market introduction could be accomplished. These were communicated to CM throughout the field test period. Based on the alpha unit test results and the diagnostic information coming from the field test experience, CM developed a 2nd generation (or beta) prototype in 2012. Field test verification units were fabricated and installed at the ZEBRAlliance site in Oak Ridge in May 2012 and at several sites near CM headquarters in Oklahoma. Field testing of the units continued through February 2013. Annual performance analyses of the beta unit (prototype 2) with vertical well ground heat exchangers (GHX) in 5 U.S. locations predict annual energy savings of 57% to 61%, averaging 59% relative to the minimum efficiency suite and 38% to 56%, averaging 46% relative to the SOA GSHPwDS. Based on the steady-state performance demonstrated by the test units it was projected that the 2nd generation units would achieve ~58% energy savings relative to the minimum efficiency suite at the Zebra Alliance site with horizontal GHX. A new product based on the beta unit design was announced by CM in 2012 the Trilogy 40 Q-mode (http://cmdealernet.com/trilogy_40.html). The unit was formally introduced in a March 2012 press release (see Appendix A) and was available for order beginning in December 2012.

Baxter, V. D. [ORNL; Rice, K. [ORNL; Murphy, R. [ORNL; Munk, J. [ORNL; Ally, Moonis [ORNL; Shen, Bo [ORNL; Craddick, William [ORNL; Hearn, Shawn A. [ClimateMaster, Inc.

2013-05-24T23:59:59.000Z

380

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

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...

382

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

383

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

384

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

385

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

386

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

387

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

388

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

389

Mohave Electric Cooperative - Heat Pump Rebate Program | Department...  

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

Heat Pump Rebate Program Mohave Electric Cooperative - Heat Pump Rebate Program Eligibility Residential Savings For Heating & Cooling Commercial Heating & Cooling Heat Pumps...

390

NEXT GENERATION COMMERCIAL HEAT PUMPWATER HEATER USING CARBON DIOXIDE USING DIFFERENT IMPROVEMENT APPROACHES  

SciTech Connect

Although heat pump water heaters are today widely accepted in Japan, where energy costs are high and government incentives for their use exist, acceptance of such a product in the U.S. has been slow. This trend is slowly changing with the introduction of heat pump water heaters into the residential market, but remains in the commercial sector. Barriers to heat pump water heater acceptance in the commercial market have historically been performance, reliability and first/operating costs. The use of carbon dioxide (R744) as the refrigerant in such a system can improve performance for relatively small increase in initial cost and make this technology more appealing. What makes R744 an excellent candidate for use in heat pump water heaters is not only the wide range of ambient temperatures within which it can operate, but also the excellent ability to match water to refrigerant temperatures on the high side, resulting in very high exit water temperatures of up to 82?ºC, as required by sanitary codes in the U.S. (Food Code, 2005), in a single pass, temperatures that are much more difficult to reach with other refrigerants. This can be especially attractive in applications where this water is used for the purpose of sanitation. While reliability has also been of concern historically, dramatic improvements have been made over the last several years through research done in the automotive industry and commercialization of R744 technology in residential water heating mainly in Japan. This paper presents the performance results from the development of an R744 commercial heat pump water heater of approximately 35 kW and a comparison to a baseline R134a unit of the same capacity and footprint. In addition, recommendations are made for further improvements of the R744 system which could result in possible energy savings of up to 20 %.

Chad Bowers; Michael Petersen; Stefan Elbel; Pega Hrnjak

2012-04-01T23:59:59.000Z

391

Sulfuric acid/water chemical heat pump/chemical energy storage. Final report: Phases 1 and 2, October 1979 through September 1980; Phases 3 and 4, October 1980 through January 1982  

DOE Green Energy (OSTI)

The sulfuric acid/water chemical heat pump/chemical energy storage (CHP/CES) concept was expanded to include previously unexplored applications, the most notable of which is the industrial chemical heat pump. A requirements analysis was completed which showed the CHP/CES application having the greatest near-term-commercialization potential in the form of a temperature amplification system. Another configuration, the HVAC system with or without diurnal storage was selected for further study. A verification test unit (VTU) was designed and is capable of demonstrating operation as an ICHP as well as an HVAC system. The VTU was fabricated and tested with a nominal power rating of 150,000 Btu/hr. Testing of the unit was directed at evaluating operational performance in the industrial waste heat upgrade mode. (LEW)

Not Available

1982-04-01T23:59:59.000Z

392

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

393

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

394

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

395

Geothermal Heat Pump Benchmarking Report  

SciTech Connect

A benchmarking study was conducted on behalf of the Department of Energy to determine the critical factors in successful utility geothermal heat pump programs. A Successful program is one that has achieved significant market penetration. Successfully marketing geothermal heat pumps has presented some major challenges to the utility industry. However, select utilities have developed programs that generate significant GHP sales. This benchmarking study concludes that there are three factors critical to the success of utility GHP marking programs: (1) Top management marketing commitment; (2) An understanding of the fundamentals of marketing and business development; and (3) An aggressive competitive posture. To generate significant GHP sales, competitive market forces must by used. However, because utilities have functioned only in a regulated arena, these companies and their leaders are unschooled in competitive business practices. Therefore, a lack of experience coupled with an intrinsically non-competitive culture yields an industry environment that impedes the generation of significant GHP sales in many, but not all, utilities.

1997-01-17T23:59:59.000Z

396

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...

397

Development of a Residential Ground-Source Integrated Heat Pump  

Science Conference Proceedings (OSTI)

A residential-size ground-source integrated heat pump (GSIHP) system has been developed and is currently being field tested. The system is a nominal 2-ton (7 kW) cooling capacity, variable-speed unit, which is multi-functional, e.g. space cooling, space heating, dedicated water heating, and simultaneous space cooling and water heating. High-efficiency brushless permanent-magnet (BPM) motors are used for the compressor, indoor blower, and pumps to obtain the highest component performance and system control flexibility. Laboratory test data were used to calibrate a vapor-compression simulation model (HPDM) for each of the four primary modes of operation. The model was used to optimize the internal control options and to simulate the selected internal control strategies, such as controlling to a constant air supply temperature in the space heating mode and a fixed water temperature rise in water heating modes. Equipment performance maps were generated for each operation mode as functions of all independent variables for use in TRNSYS annual energy simulations. These were performed for the GSIHP installed in a well-insulated 2600 ft2(242 m2) house and connected to a vertical ground loop heat exchanger(GLHE). We selected a 13 SEER (3.8 CSPF )/7.7 HSPF (2.3 HSPF, W/W) ASHP unit with 0.90 Energy Factor (EF) resistance water heater as the baseline for energy savings comparisons. The annual energy simulations were conducted over five US climate zones. In addition, appropriate ground loop sizes were determined for each location to meet 10-year minimum and maximum design entering water temperatures (EWTs) to the equipment. The prototype GSIHP system was predicted to use 52 to 59% less energy than the baseline system while meeting total annual space conditioning and water heating loads.

Rice, C Keith [ORNL; Baxter, Van D [ORNL; Hern, Shawn [ClimateMaster, Inc.; McDowell, Tim [Thermal Energy System Specialists, LLC; Munk, Jeffrey D [ORNL; Shen, Bo [ORNL

2013-01-01T23:59:59.000Z

398

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

399

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

400

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

Note: This page contains sample records for the topic "heat-pump water heaters" 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

HVAC and water heating system field test experiences at the Tennessee Energy Conservation in Housing (TECH) complex  

DOE Green Energy (OSTI)

The TECH complex has been utilized since 1976 as a field test site for several novel and conventional space conditioning and water heating systems. Systems tested include the Annual Cycle Energy System (ACES), solar space heating systems (hydronic and air), parallel and series solar assisted heat pumps, air-type solar heating with off-peak storage, passive solar heating, two conventional air-to-air heat pumps, an air-to-air heat pump with desuperheater water heater, and horizontal coil and multiple shallow vertical coil ground-coupled heat pumps. System descriptions and test results are presented as well as performance observations.

Baxter, V.D.; McGraw, B.A.

1984-01-01T23:59:59.000Z

402

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

403

Heat pumps for geothermal applications: availability and performance. Final report  

SciTech Connect

A study of the performance and availability of water-source heat pumps was carried out. The primary purposes were to obtain the necessary basic information required for proper evaluation of the role of water-source heat pumps in geothermal energy utilization and/or to identify the research needed to provide this information. The Search of Relevant Literature considers the historical background, applications, achieved and projected performance evaluations and performance improvement techniques. The commercial water-source heat pump industry is considered in regard to both the present and projected availability and performance of units. Performance evaluations are made for units that use standard components but are redesigned for use in geothermal heating.

Reistad, G.M.; Means, P.

1980-05-01T23:59:59.000Z

404

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

405

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

406

Acoustical heat-pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.

Wheatley, J.C.; Swift, G.W.; Migliori, A.

1981-08-14T23:59:59.000Z

407

Absorption-heat-pump system  

DOE Patents (OSTI)

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, G.; Perez-Blanco, H.

1983-06-16T23:59:59.000Z

408

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

409

Heat pump system with selective space cooling  

DOE Patents (OSTI)

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve. 4 figs.

Pendergrass, J.C.

1997-05-13T23:59:59.000Z

410

500F Absorption Heat Pump Under Development  

E-Print Network (OSTI)

Economic industrial heat pumping to temperatures above 500F (260C) is promised in the near future. A new absorption fluid is the key. Tested under DOE sponsorship, the new fluid has proven to be thermally stable and noncorrosive to austenitic stainless steel up to 500F, or mild steel up to 430F. Heat transfer properties are comparable to those of the conventional LiBr-H20 system. Paired with water as the working fluid, laboratory tests have shown that useful temperature lifts of over 162F (90C) ?T can be achieved allowing 10F heat exchangers. The fluid is nontoxic and noncombustible. Good economics for the system should stem from (1) high temperature capabilities for wider and more highly valued uses, (2) high internal temperature lifts for low heat exchanger surface areas, (3) predominantly carbon steel components, and (4) better COP in the heat amplifier mode than current absorption heat pumps. Recent laboratory results are presented including temperature applicability maps.

Davidson, W. F.; Erickson, D. C.

1986-06-01T23:59:59.000Z

411

Heat pump system with selective space cooling  

DOE Patents (OSTI)

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.

Pendergrass, Joseph C. (Gainesville, GA)

1997-01-01T23:59:59.000Z

412

Geothermal Heat Pump Basics | Department of Energy  

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

Heat Pump Basics Heat Pump Basics Geothermal Heat Pump Basics August 19, 2013 - 11:12am Addthis Text Version Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country experience seasonal temperature extremes-from scorching heat in the summer to sub-zero cold in the winter-the ground a few feet below the earth's surface remains at a relatively constant temperature. Depending on the latitude, ground temperatures range from 45°F (7°C) to 75°F (21°C). So, like a cave's, the ground's temperature is warmer than the air above it during winter and cooler than the air above it in summer. Geothermal heat pumps take advantage of this by exchanging heat with the earth through a ground heat exchanger. Geothermal heat pumps are able to heat, cool, and, if so equipped, supply

413

Definition: Heat pump | Open Energy Information  

Open Energy Info (EERE)

pump pump Jump to: navigation, search Dictionary.png Heat pump Heating and/or cooling equipment that, during the heating season, draws heat into a building from outside and, during the cooling season, ejects heat from the building to the outside[1] View on Wikipedia Wikipedia Definition A heat pump is a device that transfers heat energy from a heat source to a heat sink against a temperature gradient. Heat pumps are designed to move thermal energy opposite the direction of spontaneous heat flow. A heat pump uses some amount of external high-grade energy to accomplish the desired transfer of thermal energy from heat source to heat sink. While compressor-driven air conditioners and freezers are familiar examples of heat pumps, the term "heat pump" is more general and applies to

414

Development of solar assisted heat pumps for the heating and cooling of buildings. Volume II. Final technical report, February 1, 1978-June 30, 1980  

DOE Green Energy (OSTI)

A second volume containing the appendices to the report on the development of high efficiency vapor compression cycle heat pumps for use in solar assisted heat pump (SAHP) systems is presented. A water source heat pump and a solar powered absorption chiller are studied for their feasibility in improving the performance of a SAHP system. A two speed multiple level heat pump compressor is analyzed. The product data for two advanced water source heat pump models are provided along with operating instructions for a parallel compressor water source heat pump. Marketing data for SAHP systems are included.

Not Available

1980-01-01T23:59:59.000Z

415

Clarksville Department of Electricity - Residential Heat Pump...  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Clarksville Department of Electricity - Residential Heat Pump Loan Program (Tennessee) This is the approved revision of...

416

Survey of Geothermal Heat Pump Shipments  

U.S. Energy Information Administration (EIA)

Others 930 3,369 454 4,753 ... Source: Energy Information Administration, Form EIA-902 "Annual Geothermal Heat Pump Manufacturers Survey." Relased: March 2006

417

Develop Standard Method of Test for Integrated Heat Pump  

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

Integrated Integrated Heat Pump (IHP) Wayne Reedy Oak Ridge National Laboratory wreedy2@comcast.net 574-583-5487 April 2, 2013 Develop Standard Method of Test (MOT) for IHP 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * IHP → ≥50% savings in energy used for space conditioning and water heating - C. K. Rice, V. D. Baxter, S. A. Hern, T. P. McDowell, J. D. Munk, and B. Shen, 2013. "Development of a Residential Ground- Source Integrated Heat Pump", 2013 ASHRAE Winter Conference Paper, Dallas, TX., January. * No generally accepted MOT or rating standard exists

418

Multi-Function Fuel-Fired Heat Pump  

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

Multi-Function Fuel-Fired Heat Pump Multi-Function Fuel-Fired Heat Pump CRADA Ed Vineyard Oak Ridge National Laboratory, Building Equipment Research vineyardea@ornl.gov, 865-576-0576 April 2, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: 55% residential building energy use for space conditioning & water heating; highly efficient systems needed to facilitate DOE/BTO goal for 50% reduction in building energy use by 2030 Impact of Project: Cumulative energy savings potential of 0.25 Quads

419

Performance Assessment of an Advanced Hydronic Heat Pump  

Science Conference Proceedings (OSTI)

This report details testing of the Daikin Altherma, a variable speed hydronic heat pump for residential and small commercial application. The system is a highly flexible provider of relatively high-grade (high temperature) heat or cooling for a residence or small commercial institution. Nominal capacity is 36,000 Btu/hr, but this capacity can be exceeded depending on conditions. It is an air-to-water heat pump operating on the standard reverse-Rankine cycle with R-410a as the refrigerant. The outdoor hea...

2009-12-10T23:59:59.000Z

420

Develop Standard Method of Test for Integrated Heat Pump  

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

Integrated Integrated Heat Pump (IHP) Wayne Reedy Oak Ridge National Laboratory wreedy2@comcast.net 574-583-5487 April 2, 2013 Develop Standard Method of Test (MOT) for IHP 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * IHP → ≥50% savings in energy used for space conditioning and water heating - C. K. Rice, V. D. Baxter, S. A. Hern, T. P. McDowell, J. D. Munk, and B. Shen, 2013. "Development of a Residential Ground- Source Integrated Heat Pump", 2013 ASHRAE Winter Conference Paper, Dallas, TX., January. * No generally accepted MOT or rating standard exists

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Multi-Source Hydronic Heat Pump System Performance Test Bed  

E-Print Network (OSTI)

An extensive independent evaluation recently was completed of the Multi-Source Hydronic Heat Pump (MSHHP) system, a proprietary heating, ventilating and air conditioning (HVAC) system developed by Meckler Systems Group. The MSHHP tests were conducted on a unique test bed designed and constructed by National Technical Systems (NTS) through a research and development grant program funded by Southern California Edison Company. This paper outlines testing methods and results, including evaluations of peak power and energy savings allowed by the innovative system. The main difference between the MSHHP and a conventional HVAC system is use of a chilled water "diversity" cooling loop interconnecting air to water coils (located at each water source heat pump unit) with a central chilled water storage tank. The MSHHP system uses significantly less energy than a conventional HVAC system, and lowers peak demand by shifting required electrical energy consumption to lower-cost, off-peak and mid-peak rates. Lower heat pump capacities are a main feature of the MSHHP. This is accomplished by pre-cooling return air from the zone space, a process that also allows the heat pump to operate at a higher Coefficient of Performance (COP), thereby contributing to further energy savings.

Meckler, M.

1984-01-01T23:59:59.000Z

422

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

423

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

424

Geothermal groundwater heat pump. Equipment selection procedures for architects, designers and contractors  

SciTech Connect

This brochure covers the following: the way the heat pump works, why use groundwater, groundwater availability and disposal, regulations, the coefficient of performance, heat pump maintenance and reliability, heating and cooling load calculations, fuel requirement calculations, choice of equipment, calculation of water flow requirement, well pump and supply/return pipes, and design examples. (MHR)

1981-01-01T23:59:59.000Z

425

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

426

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

427

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

428

ABSORPTION HEAT PUMP IN THE DISTRICT HEATING  

E-Print Network (OSTI)

#12;ABSORPTION HEAT PUMP IN THE DISTRICT HEATING PLANT Dr.sc.ing. Agnese Lickrastina M.Sc. Normunds European Heat Pump Summit 2013, Nuremberg, 15-16.10.2013 · Riga District Heating company · Operation #12;JSC RGAS SILTUMS · the biggest District Heating company in Latvia and in the Baltic states

Oak Ridge National Laboratory

429

Heat Pump Markets UK in Europe  

E-Print Network (OSTI)

,000 units Total: 200,000 units 48% 19% 26% 0% 7% boilers heat pumps solar thermal micro chp & FC district% boilers heat pumps solar thermals micro chp & FC district heating 2010 2020Sales to new build 15% 51% 18 to Renewables Boiler non- con. Boilers con. Boiler Boiler + ST ST Boiler condensing Boiler non-condensing Boiler

Oak Ridge National Laboratory

430

The Design of an Open Rankine-Cycle Industrial Heat Pump  

E-Print Network (OSTI)

An open Rankine-cycle heat pump is ideally suited for producing low-pressure industrial process steam. Because steam serves as both the heat pump motive fluid and process fluid, the system achieves a unique simplicity and versatility. No intermediate refrigerant fluid exists for which to construct a process interface or impose a temperature limit. Interface components such as the heat pump condenser are not required. Moreover, the use of water vapor eliminates toxicity and flammability risks inherent with most closed-cycle heat pump fluids. The control strategy is simple. Low-pressure (subatmospheric) water vapor, generated by flashing steam at a temperature below that of the waste stream, is compressed to the process pressure and temperature by an electric-motor-driven, multistage compressor train. This strategy permits the heat pump to accommodate upsets such as sudden changes in the waste stream flow and/or temperature, as well as fluctuation within the process stream.

Leibowitz, H. M.; Chaudoir, D. W.

1981-01-01T23:59:59.000Z

431

Solid state radiative heat pump  

DOE Patents (OSTI)

A solid state radiative heat pump (10, 50, 70) operable at room temperature (300.degree. K.) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of charge carriers as compared to thermal equilibrium. In one form of the invention (10, 70) an infrared semiconductor photodiode (21, 71) is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention (50), a homogeneous semiconductor (51) is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation through the active surface of the semiconductor are disclosed. In one method, an anti-reflection layer (19) is coated into the active surface (13) of the semiconductor (11), the anti-reflection layer (19) having an index of refraction equal to the square root of that of the semiconductor (11). In the second method, a passive layer (75) is spaced from the active surface (73) of the semiconductor (71) by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler (91) with a paraboloid reflecting surface (92) is in contact with the active surface (13, 53) of the semiconductor (11, 51), the coupler having an index of refraction about the same as that of the semiconductor.

Berdahl, Paul H. (Oakland, CA)

1986-01-01T23:59:59.000Z

432

Solid state radiative heat pump  

DOE Patents (OSTI)

A solid state radiative heat pump operable at room temperature (300 K) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of change carriers as compared equilibrium. In one form of the invention an infrared semiconductor photodiode is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention, a homogenous semiconductor is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation the active surface of the semiconductor are disclosed. In one method, an anti-refection layer is coated into the active surface of the semiconductor, the anti-reflection layer having an index of refraction equal to the square root of that of the semiconductor. In the second method, a passive layer is speaced trom the active surface of the semiconductor by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler with a paraboloid reflecting surface surface is in contact with the active surface of the semiconductor, the coupler having an index of refraction about the same as that of the semiconductor.

Berdahl, P.H.

1984-09-28T23:59:59.000Z

433

Clark Public Utilities - Residential Heat Pump Loan Program | Department of  

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

Heat Pump Loan Program Heat Pump Loan Program Clark Public Utilities - Residential Heat Pump Loan Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Maximum Rebate Air-Source Heat Pumps: $20,000 Geothermal Heat Pumps: $30,000 Program Info State District of Columbia Program Type Utility Loan Program Rebate Amount Air-Source Heat Pump: up to $20,000 Geothermal Heat Pumps: up to $30,000 Provider Clark Public Utilities Clark Public Utilities offers loans of up to $20,000 for air-source heat pumps and $30,000 for geothermal heat pumps. Loans will help customers cover the up-front cost of installing a highly efficient heat pump in a residence. All electrically heated homes, including manufactured homes, are eligible for the heat pump financing program, as long as the home has been

434

Air-Source Heat Pumps | Department of Energy  

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

Air-Source Heat Pumps Air-Source Heat Pumps August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How...

435

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.

436

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,

437

Supercharger for Heat Pumps in Cold Climates  

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

Supercharger for Heat Supercharger for Heat Pumps in Cold Climates Thomas J. Walter Mechanical Solutions, Inc. tjw@mechsol.com 518-320-8552 April 3, 2013 DOE SBIR Grant No. SC0006162 Concept is similar to superchargers for piston engine aircraft 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Electrically driven heat pumps are an effective method of extracting heat from ambient air. As air temperature falls, however, heat pump performance falls off, essentially limiting their year round usefulness to

438

Supercharger for Heat Pumps in Cold Climates  

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

Supercharger for Heat Supercharger for Heat Pumps in Cold Climates Thomas J. Walter Mechanical Solutions, Inc. tjw@mechsol.com 518-320-8552 April 3, 2013 DOE SBIR Grant No. SC0006162 Concept is similar to superchargers for piston engine aircraft 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Electrically driven heat pumps are an effective method of extracting heat from ambient air. As air temperature falls, however, heat pump performance falls off, essentially limiting their year round usefulness to

439

Geothermal Heat Pumps Deliver Big Savings for Federal Facilities - Technology Focus  

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

EE-0291 EE-0291 Internet: www.eere.energy.gov/femp/ No portion of this publication may be altered in any form without prior written consent from the U.S. Department of Energy, Energy Efficiency and Renewable Energy, and the authoring national laboratory. Geothermal heat pump surface water loops. Geothermal Heat Pumps Deliver Big Savings for Federal Facilities An update on geothermal heat pump technologies and the Super ESPC Energy-efficiency improvements at federal facilities must enhance support for the agency's critical missions while also saving energy and money. Geothermal heat pumps (GHPs, also known as ground-source heat pumps or GeoExchange systems) can do both, and can help meet energy-conservation, emissions-reduction, and renewable-energy goals. GHP technology is now well known as a proven, reliable, efficient, and

440

Bandera Electric Cooperative - Residential Heat Pump Rebate Program...  

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

Bandera Electric Cooperative - Residential Heat Pump Rebate Program Bandera Electric Cooperative - Residential Heat Pump Rebate Program Eligibility Residential Savings For Heating...

Note: This page contains sample records for the topic "heat-pump water heaters" 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

Energy 101: Geothermal Heat Pumps | Department of Energy  

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

Sites Power Marketing Administration Other Agencies You are here Home Energy 101: Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps Addthis Description An energy-efficient...

442

White County REMC - Residential Geothermal Heat Pump Rebate Program...  

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

Other Agencies You are here Home Savings White County REMC - Residential Geothermal Heat Pump Rebate Program White County REMC - Residential Geothermal Heat Pump Rebate...

443

Assessment of Hybrid Geothermal Heat Pump Systems - Technology...  

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

cool- ing needs of the building and offers general guidelines Assessment of Hybrid Geothermal Heat Pump Systems Geothermal heat pumps offer attractive choice for space...

444

Super Energy Saver Heat Pump - Energy Innovation Portal  

ORNL researchers developed a broad class of dynamic hybrid phase change materials and coupled them to residential heat pumps, inventing a super energy saver heat pump.

445

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

446

Edmond Electric- Residential Heat Pump Rebate Program  

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

Edmond Electric offers rebates to residential customers who install energy-efficient heat pumps. This program applies to installations in both new and existing residential homes and complexes. Air...

447

Geothermal Heat Pump Basics | Department of Energy  

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

and a heat exchanger-a system of pipes buried in shallow ground. In the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery...

448

Ductless, Mini-Split Heat Pumps  

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

Ductless, mini-split-system heat pumps (mini splits), as their name implies, do not have ducts. Therefore, they make good retrofit add-ons to houses or buildings with "non-ducted" heating systems,...

449

Central Air Conditioners","Heat Pumps","Individual Air Conditioners","District Chilled Water","Central Chillers","Packaged  

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

5. Cooling Equipment, Floorspace, 1999" 5. Cooling Equipment, Floorspace, 1999" ,"Total Floorspace (million square feet)" ,"All Buildings","All Cooled Buildings","Cooling Equipment (more than one may apply)" ,,,"Residential-Type Central Air Conditioners","Heat Pumps","Individual Air Conditioners","District Chilled Water","Central Chillers","Packaged Air Conditioning Units","Swamp Coolers","Other" "All Buildings ................",67338,58474,8329,9147,14276,2750,12909,36527,2219,1312 "Building Floorspace" "(Square Feet)" "1,001 to 5,000 ...............",6774,4879,890,700,962,"Q","Q",2613,253,"Q" "5,001 to 10,000 ..............",8238,6212,1606,707,1396,"Q","Q",3197,181,"Q"

450

Optimal power consumption in a central heating system with geothermal heat pump  

E-Print Network (OSTI)

Abstract: A ground source heat pump connected to a domestic hydronic heating network is studied to be driven with the minimum electric power. The hypothesis is to decrease the forward temperature to the extent that one of the hydronic heaters work at full capacity. A less forward temperature would result in a dramatic temperature drop in the room with saturated actuator. The optimization hypothesis is inspired by the fact that, the consumed electric power by the heat pump has a strong positive correlation with the generated forward temperature. A model predictive control scheme is proposed in the current study to achieve the optimal forward temperature. At the lower hierarchy level, local PI controllers seek the corresponding room temperature setpoint. Simulation results for a multi-room house case study show considerable energy savings compared to the heat pumps traditional control scheme.

F. Tahersima; J. Stoustrup; H. Rasmussen

2011-01-01T23:59:59.000Z

451

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

452

Super Energy Saver Heat Pump with Dynamic Hybrid Phase Change ...  

Super Energy Saver Heat Pump with Dynamic Hybrid Phase Change Material United States Patent Application

453

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

454

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

455

Promotion of efficient heat pumps for heating (ProHeatPump)  

E-Print Network (OSTI)

and towns have (some) district heating, and DH currently supplies 1% of heating for buildings in Norway.2 to district heating if there is a supply. According to HP industry representatives, howeverProject Promotion of efficient heat pumps for heating (ProHeatPump) EIE/06/072 / S12

456

Experimental performance of solid-gas chemical heat pump in solar chemical heat pump dryer  

Science Conference Proceedings (OSTI)

A solar assisted chemical heat pump dryer has been designed, fabricated and tested. The performance of the system has been studied under the meteorological conditions of Malaysia. The system consists of four mean components: solar collector (evacuated ... Keywords: coefficient of performance, drying, energy density, evacuated tubes solar collector, reactor temperature, solid gas chemical heat pump

M. Ibrahim; K. Sopian; A. S. Hussein; W. R. W. Daud; A. Zaharim

2009-02-01T23:59:59.000Z

457

An Analysis of Efficiency Improvements in Residential Sized Heat Pumps  

E-Print Network (OSTI)

The objectives of this study included: (1) development of classes of heat pumps, (2) evaluation and selection of a suitable heat pump design model, (3) characterization of suitable baseline heat pump designs, (4) selection of design options that can be used to improve heat pump efficiency, and (5) development of heat pump designs to cover the whole spectrum of efficiencies available today and those that may be technologically feasible in the next few years.

O'Neal, D. L.; Boecker, C. L.; Murphy, W. E.; Notman, J. R.

1986-01-01T23:59:59.000Z

458

Projecting market demand for residential heat pumps  

SciTech Connect

Primarily because of technological improvements and sharp increases in energy prices after the 1970s energy crises, the sale of residential electric heat pumps rose ninefold from 1970 to 1983. This report describes current and future market demand for heat pumps used for space heating and cooling. A three-step approach was followed. In the first step, the historical growth of residential electric heat pumps was analyzed, and factors that may have affected market growth were examined. Also examined were installation trends of heat pumps in new single-family and multifamily homes. A market segmentation analysis was used to estimate market size by categories. In the second step, several methods for forecasting future market demand were reviewed and evaluated to select the most suitable one for this study. The discrete-choice approach was chosen. In the third step, a market penetration model based on selected discrete-choice methods was developed to project heat pump demand in key market segments such as home type (single-family or multifamily), new or existing construction, and race-ethnic origin of household (black, Hispanic, or white).

Teotia, A.P.S.; Raju, P.S.; Karvelas, D.; Anderson, J.

1987-04-01T23:59:59.000Z

459

Cold Climates Heat Pump Design Optimization  

SciTech Connect

Heat pumps provide an efficient heating method; however they suffer from sever capacity and performance degradation at low ambient conditions. This has deterred market penetration in cold climates. There is a continuing effort to find an efficient air source cold climate heat pump that maintains acceptable capacity and performance at low ambient co