scholarly journals Heating load and COP optimizations for a class of generalized irreversible universal steady-flow variable-temperature heat reservoir heat pump cycle model

2010 ◽  
Vol 5 (4) ◽  
pp. 210-222
Author(s):  
H. Feng ◽  
L. Chen ◽  
F. Sun
Keyword(s):  
Steady Flow ◽  
Heat Pump ◽  
Variable Temperature ◽  
Flow Variable ◽  
Heat Reservoir ◽  
Cycle Model ◽  
Temperature Heat ◽  
Heating Load

Performance Optimization of a Combined Heat Pump Cycle

2003 ◽  
Vol 10 (04) ◽  
pp. 377-389 ◽  
Author(s):  
Lingen Chen ◽  
Yuehong Bi ◽  
Fengrui Sun ◽  
Chih Wu
Keyword(s):  
Heat Resistance ◽  
Steady Flow ◽  
Heat Pump ◽  
Performance Optimization ◽  
Coefficient Of Performance ◽  
Cycle Model ◽  
Heat Leakage ◽  
Heating Load ◽  
Internal Irreversibility ◽  
Optimal Heating

A steady flow combined heat pump cycle model with heat resistance, heat leakage and internal irreversibility is built in this paper. The optimal performance of the model is studied. The relation between optimal heating load and coefficient of performance (COP), as well as the maximum COP and the corresponding heating load are derived.

Heating load and COP optimisations for a universal steady flow endoreversible heat pump model

2011 ◽  
Vol 32 (2) ◽  
pp. 70-77
Author(s):  
Huijun Feng ◽  
Lingen Chen ◽  
Fengrui Sun ◽  
Chih Wu
Keyword(s):  
Steady Flow ◽  
Heat Pump ◽  
Heating Load

Optimal Performance of an Endoreversible Four-Heat-Reservoir Absorption Heat-Transformer

2004 ◽  
Vol 11 (02) ◽  
pp. 147-159 ◽  
Author(s):  
Xiaoyong Qin ◽  
Lingen Chen ◽  
Fengrui Sun ◽  
Chih Wu
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Heat Transfer Surface ◽  
Coefficient Of Performance ◽  
Heat Reservoir ◽  
Cycle Model ◽  
Surface Areas ◽  
Heating Load ◽  
Temperature Levels ◽  
Heat Transformer

Based on an endoreversible absorption heat-transformer cycle model operating between four temperature levels with linear (Newtonian) heat transfer law, the fundamental optimal relation between the specific heating load and the coefficient of performance, the optimal temperatures of the working substance, and the optimal heat transfer surface areas of the four heat exchangers are derived by using finite-time thermodynamics. Moreover, the effects of the cycle parameters on the cycle characteristic are studied by numerical examples. The results obtained herein can provide some guidance for the optimal design of absorption heat-transformers.

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