Performance evaluation of ground source heat pump using linear and nonlinear regressions and artificial neural networks

2020 ◽  
Vol 180 ◽  
pp. 115914
Author(s):  
Xinjie Xu ◽  
Jinxiang Liu ◽  
Yu Wang ◽  
Jinjun Xu ◽  
Jun Bao
2013 ◽  
Vol 724-725 ◽  
pp. 909-915
Author(s):  
Ping Fang Hu ◽  
Zhong Yi Yu ◽  
Fei Lei ◽  
Na Zhu ◽  
Qi Ming Sun ◽  
...  

A vertical U-tube ground heat exchanger can be utilized to exchange heat with the soil in ground source heat pump systems. The outlet temperature of the working fluid through the U-tube not only accounts for heat transfer capacity of a ground heat exchanger, but also greatly affects the operational efficiency of heat pump units, which is an important characteristic parameter of heat transfer process. It is quantified by defining a thermal effectiveness coefficient. The performance evaluation is performed with a three dimensional numerical model using a finite volume technique. A dynamic simulation was conducted to analyze the thermal effectiveness as a function of soil thermal properties, backfill material properties, separation distance between the two tube legs, borehole depth and flow velocity of the working fluid. The influence of important characteristic parameters on the heat transfer performance of vertical U-tube ground heat exchangers is investigated, which may provide the references for the design of ground source heat pump systems in practice.


2015 ◽  
Vol 2015 (0) ◽  
pp. _H233-1_-_H233-22
Author(s):  
Daisuke Tanaka ◽  
Takanori Aoyama ◽  
Tetsuaki Takeda ◽  
Shumpei Funatani ◽  
Koichi Ichimiya ◽  
...  

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