Research on Heat and Moisture Transfer Characteristics of Soil in Unsaturated and Saturated Condition with Soil Stratification under Vertical Borehole Ground Heat Exchanger Operation

2020 ◽  
pp. 599-609
Author(s):  
Yao Wang ◽  
Songqing Wang
Keyword(s):  
Heat Exchanger ◽  
Moisture Transfer ◽  
Ground Heat Exchanger ◽  
Heat And Moisture Transfer ◽  
Saturated Condition ◽  
Transfer Characteristics ◽  
Heat And Moisture ◽  
Vertical Borehole

A novel 2-D ring-tubes model and numerical investigation of heat and moisture transfer around helix ground heat exchanger

Geothermics ◽  
2020 ◽  
Vol 85 ◽  
pp. 101789 ◽  
Author(s):  
Yajiao Liu ◽  
Guangqin Huang ◽  
Jun Lu ◽  
Xiaofeng Yang ◽  
Chunlong Zhuang ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Numerical Investigation ◽  
Moisture Transfer ◽  
Ground Heat Exchanger ◽  
Heat And Moisture Transfer ◽  
Heat And Moisture

The Influence of Heat and Moisture Transfer in Soil on the Performance of the Ground Heat Exchanger

2012 ◽  
Vol 594-597 ◽  
pp. 2120-2127
Author(s):  
Guo Min Shen ◽  
Chun Fang Lu ◽  
Yi Wang
Keyword(s):  
Thermal Properties ◽  
Heat Exchanger ◽  
Moisture Content ◽  
Moisture Transfer ◽  
Initial Moisture Content ◽  
Borehole Wall ◽  
Ground Heat Exchanger ◽  
Heat And Moisture Transfer ◽  
Soil Thermal Properties ◽  
Heat And Moisture

In this paper, a numerical heat and moisture transfer model (HMTM) and a pure conduction model (PCM) were established separately for unsaturated soil around the ground heat exchanger (GHE) and were numerically solved by finite volume method. The simulation results indicate that rejecting heat into soil can reduce moisture content in the vicinity of the borehole wall. When the initial moisture content is high, moister transfer has little effect on soil thermal properties. In this case, the results of the HMTM and the PCM are basically identical. On the contrary, when the initial moisture content is low, the thermal effect has significant influence on moisture transfer around the borehole wall, and the soil thermal properties will change correspondingly. In this case, there is a large difference between the results of these two models.

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