Consideration of the performance of a vapour-compression heat-pump cycle using non-azeotropic refrigerant mixtures

1992 ◽  
Vol 15 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Akio Miyara ◽  
Shigeru Koyama ◽  
Tetsu Fujii
Keyword(s):  
Heat Pump ◽  
Refrigerant Mixtures ◽  
Vapour Compression

scholarly journals Simulation on vapour compression heat pump system for rough rice drying

2020 ◽  
Vol 542 ◽  
pp. 012042
Author(s):  
L O Nelwan ◽  
R P A Setiawan ◽  
M Yulianto ◽  
Irfandi ◽  
M Fachry ◽  
...  
Keyword(s):  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Rough Rice ◽  
Rice Drying ◽  
Vapour Compression

Heat Pump Cycle Using Refrigerant Mixtures of HFC32 and HFO1234yf

2020 ◽  
pp. 1-10 ◽  
Author(s):  
Kosei Takezato ◽  
Shou Senba ◽  
Takahiko Miyazaki ◽  
Nobuo Takata ◽  
Yukihiro Higashi ◽  
...  
Keyword(s):  
Heat Pump ◽  
Refrigerant Mixtures

scholarly journals Performance estimation of membrane dehumidification based on heat exchanger analogy approaches using ε-NTU model

2020 ◽  
Vol 15 (2) ◽  
pp. 299-307
Author(s):  
Gilbong Lee ◽  
Chul Woo Roh ◽  
Bong Soo Choi ◽  
Eunseok Wang ◽  
Ho-Sang Ra ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Cooling System ◽  
Design Guidelines ◽  
Performance Estimation ◽  
Department Of Energy ◽  
Dew Point ◽  
Design Parameters ◽  
Evaporator Temperature ◽  
Vapour Compression

Abstract Reports by the US Department of Energy in 2014 evaluated membrane heat pump technology as one of the most promising alternatives to conventional vapour compression methods. Vapour compression methods maintain an evaporator temperature lower than the dew point to deal with the latent heat load. In membrane heat pump systems, only the water vapour is transferred and there is no phase change. The migration is caused by the difference in vapour pressure before and after the membrane. A vacuum pump or blower is used to create the pressure difference. However, there is no methodology for predicting dehumidification performance of membranes when used as part of a cooling system. In this study, using the assumption that there is a similarity between heat transfer and moisture pervaporation, the performance indices of the membrane are derived using a well-known heat exchanger method, the ε-NTU models. Performance estimations are calculated for two representative system layouts: bypass and vacuum. Simple relations between design parameters are suggested, giving design guidelines for researchers.

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