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

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.

Exergy-Based Ecological Optimization of an Irreversible Quantum Carnot Heat Pump with Spin-1/2 Systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaowei Liu ◽  
Lingen Chen ◽  
Yanlin Ge ◽  
Huijun Feng ◽  
Feng Wu ◽  
...  
Keyword(s):  
Heat Pump ◽  
Performance Comparison ◽  
Ecological Function ◽  
Performance Characteristics ◽  
Numerical Examples ◽  
Ecological Performance ◽  
Special Cases ◽  
Heating Load ◽  
Ecological Optimization

AbstractBased on an irreversible quantum Carnot heat pump model in which spin-1/2 systems are used as working substance, an exergy-based ecological function and some other important parameters of the model heat pump are derived. Numerical examples are provided to investigate its ecological performance characteristics. The influences of various irreversibility factors on the ecological performance are discussed. Performance comparison and discussion among maximum points of ecological function, heating load, and so on, are conducted. At last, three special cases are discussed.

Advances in Ground Source Heat Pump Systems Applied in Most Areas of China: A Review

2014 ◽  
Vol 716-717 ◽  
pp. 805-808 ◽  
Author(s):  
Xin Wang ◽  
Hong Liu ◽  
Di Di Xue
Keyword(s):  
Heat Pump ◽  
Heat Pumps ◽  
Ground Heat Exchanger ◽  
Ground Source Heat Pump ◽  
Heat Accumulation ◽  
Ground Source ◽  
Heating Load ◽  
The Difference ◽  
Thermal Imbalance ◽  
System Operating

Because of the advantage on energy saving and environmental sustainable development, the ground source heat pump (GSHP) system has received the widespread attention and application in recent years.However,the difference between cooling load in summer and heating load in winter is obvious in most areas of our country,so it can cause the heat accumulation around ground heat exchanger,which will result in degradation of system performance and increment of system operating costs.To solve the problem of thermal imbalance,it is necessary to research the soil temperature field around the buried pipes in the process of system operation.This paper begins with a review of the studies about the ground source heat pump systems.This is followed by a review of various methods of enhancing the performance of heat pumps based on the thermal imbalance.And then,this paper shows some studies about ground source heat pump systems based on the groundwater seepage.

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