学校建筑应用地埋管热泵技术研究

Research on ground-coupled heat pump technology in school buildings

地埋管热泵技术具有较强的区域性与建筑类别的选择性,针对学校建筑负荷特点分析研究地埋管热泵系统在学校建筑上应用的可行性是该技术在学校类建筑推广应用的前提和基础。文章探讨了地埋管热泵在我国不同气候条件下应用的可行性;利用仿真模型对山东某学校进行地埋管热泵系统模拟优化设计及能耗分析。结果表明:保证系统运行20a所需的钻孔总长度为8.1万m;经过4a的模拟运行可得距离钻孔5m远处的岩土温度仅比初始温度升高了0.7℃;该地埋管热泵系统一平方米建筑面积的全年运行费用仅12元。

The ground-coupled heat pump （GCHP） technology behaves a strong dependence on the types of regions and buildings. It is necessary to investigate the application possibility of the GCHP for school buildings based on the building loads before wider application of this technology to school buildings. This paper discusses the applications of the GCHP system in various climates in China. A system simulation model is employed to conduct an optimal GCHP design for a school building and to simulate the system energy performance. The results demonstrate that the total designed borehole length is 81,000 meters for the purpose of a 20-year operating period. The simulation results also show that the underground soil temperature rise at the point 5 m far away from the borehole field will be only 0.7℃ compared to the initial soil temperature after four years＇ operation. The operating cost is 12 RMB per square meter for a whole year＇s operation in this case study.