北京某厂区地埋管地源热泵系统运行分析及建议

为了分析地埋管地源热泵项目的运行情况和影响因素,提高地埋管地源热泵系统的科学性和合理性,以北京某厂区地源热泵系统项目为例,介绍了项目勘察和系统设计情况,并与实测的运行2年内岩土体温度场的热平衡及温度变化、地埋管进出水温度及单孔延米换热量等指标进行了对比分析。监测表明,该项目岩土体热平衡分析结果与岩土体温度实测分析结果基本吻合,冬季、夏季实际运行工况优于测试工况,实际单孔延米换热量小于相同工况下根据测试条件反推出的单孔延米换热量。同时进一步指出地埋管地源热泵项目应该加强前期勘察及热响应测试、后期运行维护管理和长期监测。

OPERATIONAL ANALYSIS ON GEOTHERMAL PUMP SYSTEM OF A FACTORY IN BEIJING

This paper, in order to analyze the operation and factors of geothermal pump system and improve its engineering, selects a factory’s geothermal pump project on the basis of project introduction and design to analyze the indicators of heat balance and temperature change of rock body, pipe input/output temperature and heat exchange per meter in single hole. The result shows that the theoretical heat balance in the rock body is close to the measured. The operation in winter and summer is better than the tested, with the actual heat exchange per meter in single hole less than the tested. This paper points out that geothermal pump project shall be boosted at its early exploration and heat response test, and at its later maintenance and monitoring.