NUMERICAL INVESTIGATION ON FREE COOLING PERFORMANCE OF GROUND-SOURCE HEAT PUMP IN A SOLAR GREENHOUSE

被引：2

作者：

Hou, Zhao ^{[1
]}

Hu, Yuqiu ^{[1
]}

Liu, Xiaojie ^{[1
]}

Wang, Jianhua ^{[1
]}

Yang, Mei ^{[1
]}

Fan, Jun ^{[1
]}

机构：

[1] Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An, Peoples R China

来源：

THERMAL SCIENCE | 2023年 / 27卷 / 6A期

关键词：

ground source heat pump; borehole free cooling; solar greenhouse; ENERGYPLUS; SYSTEM; EXCHANGER; SIMULATION;

D O I：

10.2298/TSCI221203161H

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents the numerical study of a ground source heat pump with borehole free cooling in a solar greenhouse. The system is mainly composed of a solar greenhouse with a water-water heat pump, a ground heat exchanger, and several pipes for free cooling. Thermal performances of ground source heat pump with and without borehole free cooling are investigated. The cooling time of the solar greenhouse is divided into transitional seasons (May and September) and summer seasons (from June to August). The mixed mode, including the free cooling mode and the ground source heat pump cooling mode, runs in summer seasons. During the entire transition seasons, the free cooling mode consumes 33.6% of the electricity in the ground source heat pump cooling mode and the soil thermal storage in free cooling mode is 76.3% of that in ground source heat pump cooling mode. Throughout the summer seasons, the power consumption of the mixed mode is 4.3% lower than that of the ground source heat pump cooling mode, and mixed mode soil thermal storage is 19.5% lower than that of ground source heat pump cooling mode. The results indicate that borehole free cooling system has better energy-saving performance during whole cooling period. In addition, a borehole free cooling system can also reduce the thermal imbalance in the soil.

引用

页码：4719 / 4732

页数：14

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