Subsurface utilization as a heat sink for large-scale ground source heat pump: Case study in Bangkok, Thailand

Subsurface utilization as a heat sink for large-scale ground source heat pump: Case study in Bangkok, Thailand
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地下利用作为大型地源热泵的散热器:泰国曼谷的案例研究

DOI:
10.1016/j.renene.2021.08.116
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发表时间:
2021
期刊:
影响因子:
8.7
通讯作者:
Kurishima Hideaki
Kurishima Hideaki
中科院分区:
工程技术1区
文献类型:
--
作者:
Shimada Yutaro;Tokimatsu Koji;Asawa Takashi;Uchida Youhei;Tomigashi Akira;Kurishima Hideaki

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在热带地区,地下作为地源热泵(GSHPs)的散热器使用会导致长期的热积累,从而导致能量性能下降。然而,在这些地区的地源热泵的适用性从来没有被调查的基础上预测的散热器温度在整个生命周期。本研究的目的是评估的能源性能的大型地源热泵系统在泰国的代表性建筑模型的基础上,来自预测的50年的散热器温度的操作条件。所提出的系统结合了地源热泵和空气源热泵(ASHP),并且,在一种情况下,地源热泵还供应热水。结果证实,组合系统比单独的空气源热泵系统效率更高,土壤源热泵提供热水实现了大幅节能。然而,每年的地源热泵运行小时的限制是必不可少的,导致低节能性能的冷却为主的设施。通过减轻每个埋管换热器之间的热相互作用,预计会有进一步的改进。
Subsurface utilization in the tropical regions as a heat sink for ground source heat pumps (GSHPs) leads to thermal buildup in the long term, resulting in the decreased energy performance. However, the applicability of the GSHP in these regions has never been investigated based on the predicted heat sink temperature over a lifetime. This study aimed to evaluate the energy performance of a large-scale GSHP system in representative building models in Thailand based on operating conditions derived from a predicted 50-year heat sink temperature. The proposed system combines a GSHP and an air-source heat pump (ASHP), and, in one scenario, the GSHP also supplies hot water. The results confirm that the combined system achieves a higher efficiency than that of an ASHP system alone, and GSHP supplying hot water realizes substantial energy-saving. However, limitations on the annual GSHP operation hours are essential, resulting in low energy-saving performance for cooling dominated facilities. Further improvements are expected by mitigating the thermal interactions among each borehole heat exchanger.
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