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Sensitivity Analysis Using a Simplified Transient Heat Transfer Model to Examine How Soils with Extreme Properties Affect Single and Double U-tube Borehole Heat Exchanger Designs
Dynamic simulation along with soil sensitivity analysis was conducted to examine how specific extreme soils affected the overall heat transfer performance of borehole heat exchanger. Effects of various ranges of soils with extreme properties were numerically tested through changing the borehole heat exchanger parameters such as shank spacing, grout thermal conductivity, and borehole length. The soils tested were chosen based on their extreme thermal conductivities. Through the performed simulations, it was determined that, through increased soil thermal conductivity and decreased grout thermal conductivity, borehole loading (in terms of Watts per unit borehole length, W/m) would be maximized. Similarly, shorter total borehole depths would also increase the Watt’s per meter length. Increasing the half shank spacing would also in turn increase the borehole loading. Through the analysis of various types of soils used for both single and double U-tube borehole heat exchangers (BHEs), an optimized design can be found through ensuring which specified parameters are either maximized or minimized.
Sensitivity Analysis Using a Simplified Transient Heat Transfer Model to Examine How Soils with Extreme Properties Affect Single and Double U-tube Borehole Heat Exchanger Designs
Dynamic simulation along with soil sensitivity analysis was conducted to examine how specific extreme soils affected the overall heat transfer performance of borehole heat exchanger. Effects of various ranges of soils with extreme properties were numerically tested through changing the borehole heat exchanger parameters such as shank spacing, grout thermal conductivity, and borehole length. The soils tested were chosen based on their extreme thermal conductivities. Through the performed simulations, it was determined that, through increased soil thermal conductivity and decreased grout thermal conductivity, borehole loading (in terms of Watts per unit borehole length, W/m) would be maximized. Similarly, shorter total borehole depths would also increase the Watt’s per meter length. Increasing the half shank spacing would also in turn increase the borehole loading. Through the analysis of various types of soils used for both single and double U-tube borehole heat exchangers (BHEs), an optimized design can be found through ensuring which specified parameters are either maximized or minimized.
Sensitivity Analysis Using a Simplified Transient Heat Transfer Model to Examine How Soils with Extreme Properties Affect Single and Double U-tube Borehole Heat Exchanger Designs
Environ Sci Eng
Wang, Liangzhu Leon (editor) / Ge, Hua (editor) / Zhai, Zhiqiang John (editor) / Qi, Dahai (editor) / Ouf, Mohamed (editor) / Sun, Chanjuan (editor) / Wang, Dengjia (editor) / Kostevski, Michael (author) / Fung, Alan S. (author) / Leong, Wey H. (author)
International Conference on Building Energy and Environment ; 2022
Proceedings of the 5th International Conference on Building Energy and Environment ; Chapter: 136 ; 1313-1320
2023-09-05
8 pages
Article/Chapter (Book)
Electronic Resource
English