New global thermal numerical model of vertical U-tube ground heat exchanger

2021 ◽  
Vol 168 ◽  
pp. 343-352
Author(s):  
Michal Chwieduk
Keyword(s):  
Heat Exchanger ◽  
Numerical Model ◽  
Ground Heat Exchanger

A simplified semi-numerical model to simulate a U-pipe ground heat exchanger

2020 ◽  
Vol 77 (5) ◽  
pp. 482-496
Author(s):  
Changlong Wang ◽  
Zhijia Huang ◽  
Yuehong Lu ◽  
Xinjie Huang ◽  
Han Fang
Keyword(s):  
Heat Exchanger ◽  
Numerical Model ◽  
Ground Heat Exchanger

scholarly journals Analysis of Heat Exchange Rate for Low-Depth Modular Ground Heat Exchanger through Real-Scale Experiment

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1893
Author(s):  
Kwonye Kim ◽  
Jaemin Kim ◽  
Yujin Nam ◽  
Euyjoon Lee ◽  
Eunchul Kang ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pump ◽  
Heat Extraction ◽  
Ground Heat Exchanger ◽  
Pump System ◽  
Heat Pump System ◽  
Scale Experiment ◽  
Real Scale

A ground source heat pump system is a high-performance technology used for maintaining a stable underground temperature all year-round. However, the high costs for installation, such as for boring and drilling, is a drawback that prevents the system to be rapidly introduced into the market. This study proposes a modular ground heat exchanger (GHX) that can compensate for the disadvantages (such as high-boring/drilling costs) of the conventional vertical GHX. Through a real-scale experiment, a modular GHX was manufactured and buried at a depth of 4 m below ground level; the heat exchange rate and the change in underground temperatures during the GHX operation were tracked and calculated. The average heat exchanges rate was 78.98 W/m and 88.83 W/m during heating and cooling periods, respectively; the underground temperature decreased by 1.2 °C during heat extraction and increased by 4.4 °C during heat emission, with the heat pump (HP) working. The study showed that the modular GHX is a cost-effective alternative to the vertical GHX; further research is needed for application to actual small buildings.

Parametric analysis, response surface, sensitivity analysis, and optimization of a novel spiral-double ground heat exchanger

2021 ◽  
Vol 240 ◽  
pp. 114251
Author(s):  
Ahmed A. Serageldin ◽  
Ali Radwan ◽  
Takao Katsura ◽  
Yoshitaka Sakata ◽  
Shigeyuki Nagasaka ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Heat Exchanger ◽  
Response Surface ◽  
Parametric Analysis ◽  
Ground Heat Exchanger ◽  
Surface Sensitivity
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