scholarly journals High Efficiency Water Heating Technology Development Final Report. Part I, Lab/Field Performance Evaluation and Accelerated Life Testing of a Hybrid Electric Heat Pump Water Heater (HPWH)

2016 ◽  
Author(s):  
Van D. Baxter ◽  
Richard W. Murphy ◽  
C. Keith Rice ◽  
Randall Lee Linkous
Keyword(s):  
High Efficiency ◽  
Technology Development ◽  
Field Performance ◽  
Accelerated Life Testing ◽  
Final Report ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Accelerated Life ◽  
Electric Heat ◽  
Heating Technology

scholarly journals High Efficiency Water Heating Technology Development Final Report, Part II: CO2 and Absorption-Based Residential Heat Pump Water Heater Development

2017 ◽  
Author(s):  
Kyle R. Gluesenkamp ◽  
Omar Abdelaziz ◽  
Viral K. Patel ◽  
Bracha T. Mandel ◽  
Valmor F. de Almeida
Keyword(s):  
Heat Pump ◽  
High Efficiency ◽  
Technology Development ◽  
Final Report ◽  
Water Heating ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Heating Technology

Research and development of an air-cycle heat-pump water heater. Final report

1979 ◽  
Author(s):  
J.T. Dieckmann ◽  
A.J. Erickson ◽  
A.C. Harvey ◽  
W.M. Toscano
Keyword(s):  
Research And Development ◽  
Heat Pump ◽  
Final Report ◽  
Water Heater ◽  
Heat Pump Water Heater

Accelerated Life Test and Field Test Performance Results for an Integral Heat Pump Water Heater

2004 ◽  
Author(s):  
R. W. Murphy ◽  
V. D. Baxter
Keyword(s):  
Water Supply ◽  
Heat Pump ◽  
Field Performance ◽  
Test Period ◽  
Accelerated Life Test ◽  
Seasonal Temperature ◽  
Water Heater ◽  
Durability Test ◽  
Temperature Variations ◽  
Heat Pump Water Heater

A residential heat pump water heater (HPWH) of integral-type design (heat pump unit mounted directly to tank with no water circulation pump) has undergone both durability and field performance testing. Results of two rounds of durability testing and evaluation of as-installed field efficiency vs ambient conditions at HPWH location are summarized in this paper. Ten of the HPWHs were run through an initial durability test designed to represent seven to ten years of normal compressor cycling to meet hot water needs of a residence. The first generation control system proved to be the least reliable component of the units with a 40% failure rate for its temperature input sensors and one complete system failure. After modification of the controls a second durability test was run with five units. There were essentially no operational failures during the second test. In parallel with the durability tests, HPWH units were installed in occupied residences at 18 US locations and field performance data were collected for 1–2 years. Results for two units with differing degrees of exposure to seasonal ambient air temperature and supply water temperature variations are presented and interpreted in this paper. For the first unit, installed in a conditioned space with well water supply, such seasonal temperature variations were small. The average field-measured coefficient of performance (COP) over a 75-week test period for this unit was 2.44 ±5% and weekly averages ranged from 9% below to 10% above the overall average. For the second unit, installed in an unconditioned space with city water supply, the seasonal temperature variations were substantial. Its average COP was 1.81 ±5% over a 104-week test period and weekly averages ranged from 38% below to 28% above that value.

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

2013 ◽  
Author(s):  
Michael Garrabrant ◽  
Roger Stout ◽  
Paul Glanville ◽  
Janice Fitzgerald ◽  
Chris Keinath
Keyword(s):  
Heat Pump ◽  
Final Report ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Development And Validation

scholarly journals Research and development of a high efficiency gas-fired water heater. Volume 1. Final report summary

1980 ◽  
Author(s):  
A.D. Vasilakis ◽  
J.F. Pearson ◽  
J. Gerstmann
Keyword(s):  
Research And Development ◽  
High Efficiency ◽  
Final Report ◽  
Water Heater

Experimental study for a high efficiency cascade heat pump water heater system using a new near-zeotropic refrigerant mixture

2018 ◽  
Vol 138 ◽  
pp. 783-794 ◽  
Author(s):  
Xuelian Ma ◽  
Yufeng Zhang ◽  
Xiaoqiong Li ◽  
Hongfu Zou ◽  
Na Deng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pump ◽  
High Efficiency ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Refrigerant Mixture

scholarly journals Development of high-efficiency carbon dioxide commercial heat pump water heater

2013 ◽  
Vol 19 (7) ◽  
pp. 823-835 ◽  
Author(s):  
Michael Petersen ◽  
Chad Bowers ◽  
Stefan Elbel ◽  
Pega Hrnjak
Keyword(s):  
Carbon Dioxide ◽  
Heat Pump ◽  
High Efficiency ◽  
Water Heater ◽  
Heat Pump Water Heater

Exploration of an Efficient Control Rule Set of a Heat Pump Water Heater by Genetic Algorithms

2010 ◽  
Vol 130 (2) ◽  
pp. 194-200 ◽  
Author(s):  
Hidenori Komatsu ◽  
Ken-ichi Tokoro ◽  
Yasushi Sinohara
Keyword(s):  
Genetic Algorithms ◽  
Heat Pump ◽  
Water Heater ◽  
Control Rule ◽  
Heat Pump Water Heater ◽  
Efficient Control ◽  
Rule Set

Study Case of Utilization of Surplus Power of PV by Using Heat Pump Water Heater

2014 ◽  
Vol 134 (9) ◽  
pp. 1276-1281
Author(s):  
Eitaro Omine ◽  
Masahiro Asari ◽  
Hiromu Kobayashi
Keyword(s):  
Heat Pump ◽  
Water Heater ◽  
Heat Pump Water Heater ◽  
Study Case ◽  
Surplus Power

ACCELERATED LIFE TESTING OF COMPONENTS OF NUCLEAR RESEARCH REACTORS

2016 ◽  
Author(s):  
Vanderley Vasconcelos ◽  
WELLINGTON SOARES ◽  
Antonio Carlos Lopes da Costa ◽  
Raíssa Oliveira Marques
Keyword(s):  
Nuclear Research ◽  
Accelerated Life Testing ◽  
Life Testing ◽  
Research Reactors ◽  
Accelerated Life
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