Numerical investigation of the performance of group of geothermal energy piles in unsaturated sand
Numerical investigation of the performance of group of geothermal energy piles in unsaturated sand
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DOI：
10.1051/e3sconf/202020505025
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发表时间：
2020
影响因子：
--
通讯作者：
A. Sani;R. Singh
中科院分区：
文献类型：
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作者：
A. Sani;R. Singh
使用基础结构(桩)耦合到热泵系统，通常称为地热能桩(GEP)系统，提供了一种可再生能源解决方案，实现建筑物的空间供暖和制冷；同时还用于提高上面结构的结构稳定性。该系统通过封闭在高密度聚乙烯塑料管中的载热流体循环，与建筑物交换浅地表内的低品位热能。在夏季，热能从建筑中提取并转移到地面，实现空间降温。而在冬季，地热能被利用并转移到建筑中，实现可持续的空间供暖。研究了不同初始土壤孔隙水含量对GEP系统的热工性能的影响。通过五年的模拟，发现土壤孔隙水含量的增加降低了群内GEP之间发生热相互作用的可能性。此外，还观察到，在五年期间，土壤域内的最高温度呈非线性下降趋势。
The use of foundation structures (piles) coupled to a heat pump system, commonly referred to as geothermal energy pile (GEP) system, provides a renewable energy solution of achieving space heating and cooling in buildings; whilst also being utilised for the structural stability of the overlying structures. The system operates by exchanging the low-grade heat energy within the shallow earth surface with the building, via the circulation of heat carrier fluid enclosed in a high-density polyethylene plastic pipes. In summer, heat energy is extracted from the building and transferred into the ground to achieve space cooling. While in winter, the ground heat energy is harnessed and transferred to the building to achieve sustainable space heating. This paper investigates the thermal performance of group of GEP system under the effects of different initial soil pore water content. Through the five-year simulation’s period, it was found that the increase in soil pore water content decreases the possibility of thermal interaction between the GEPs in the group. Also, it was observed that the trend in maximum temperature witnessed within the soil domain decreases nonlinearly during the five years period.