Performance Evaluation of Geothermal Heat Pump With Direct Expansion Type Vertical Ground Heat Exchanger

2015 ◽  
Vol 36 (12) ◽  
pp. 1046-1052 ◽  
Author(s):  
Minsung Kim ◽  
Gilbong Lee ◽  
Young-Jin Baik ◽  
Ho-Sang Ra
Keyword(s):  
Performance Evaluation ◽  
Heat Exchanger ◽  
Heat Pump ◽  
Ground Heat Exchanger ◽  
Direct Expansion ◽  
Geothermal Heat ◽  
Geothermal Heat Pump ◽  
Vertical Ground

The effects of ground heat exchanger parameters changes on geothermal heat pump performance – A review

2018 ◽  
Vol 129 ◽  
pp. 1645-1658 ◽  
Author(s):  
Younes Noorollahi ◽  
Reza Saeidi ◽  
Mohammad Mohammadi ◽  
Ali Amiri ◽  
Mehdi Hosseinzadeh
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Ground Heat Exchanger ◽  
Geothermal Heat ◽  
Pump Performance ◽  
Geothermal Heat Pump

Performance Evaluation of a Vertical U-Tube Ground Heat Exchanger Using a Numerical Simulation Approach

2013 ◽  
Vol 724-725 ◽  
pp. 909-915
Author(s):  
Ping Fang Hu ◽  
Zhong Yi Yu ◽  
Fei Lei ◽  
Na Zhu ◽  
Qi Ming Sun ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Performance Evaluation ◽  
Heat Exchanger ◽  
Heat Pump ◽  
Heat Transfer Process ◽  
Working Fluid ◽  
Outlet Temperature ◽  
Ground Heat Exchanger ◽  
Ground Source Heat Pump ◽  
Ground Source

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.

Development of a Fast Design Method for Direct Expansion Geothermal Heat Pump in Heating Mode

2015 ◽  
Author(s):  
Rousseau Clément ◽  
Jean-Louis Comlan Fannou ◽  
Louis Lamarche ◽  
Stanislaw Kajl ◽  
Mohamed Ouzzane
Keyword(s):  
Heat Pump ◽  
Design Method ◽  
Direct Expansion ◽  
Geothermal Heat ◽  
Geothermal Heat Pump ◽  
Heating Mode
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