The Development of Heat Pump Water Heater System with a Carbon Dioxide Hermetic Swing Rotary Compressor

2004 ◽  
Vol 2004.9 (0) ◽  
pp. 439-442
Author(s):  
Hirosi Nakayama ◽  
Mitsuharu Uchida ◽  
Masahide Higuchi ◽  
Yutaka Shibata ◽  
Yasuhiko Oka
Keyword(s):  
Carbon Dioxide ◽  
Heat Pump ◽  
Rotary Compressor ◽  
Water Heater ◽  
Heat Pump Water Heater

Study of Circuit Number on the Evaporator in CO2 Heat Pump Water Heater

2011 ◽  
Vol 71-78 ◽  
pp. 2266-2270 ◽  
Author(s):  
Kang Liu ◽  
Jing Lv ◽  
Song Bo Zhang ◽  
Jie Yang
Keyword(s):  
Heat Transfer ◽  
Carbon Dioxide ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Heat Pump ◽  
Temperature Difference ◽  
Water Heater ◽  
Overall Heat Transfer Coefficient ◽  
Heat Pump Water Heater ◽  
Simulation Package

In the design of a carbon dioxide heat pump water heater evaporator, the effect of the circuit number on the evaporator is investigated numerically by EVAP-COND 3.0 version simulation package of American National Institute of Standards and Technology. It is found that as the circuit number increases the temperature difference between the air and the refrigerant increases, but it reduces the overall heat transfer coefficient. The evaporator capacity will rise firstly, and then drop with the circuit number and achieve the maximum in the optimum circuit number. Therefore, selecting the appropriate circuit number of the evaporator can significantly improve the efficiency and optimize the design.

Design of a CO[sub 2] Twin Rotary Compressor for a Heat Pump Water Heater

2010 ◽  
Author(s):  
Jong Min Ahn ◽  
Woo Young Kim ◽  
Hyun Jin Kim ◽  
Sung Oug Cho ◽  
Jong Cheun Seo ◽  
...  
Keyword(s):  
Heat Pump ◽  
Rotary Compressor ◽  
Water Heater ◽  
Heat Pump Water Heater

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

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
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