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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。
In order to analyze the operation and influencing factors of ground source heat pump project and to improve the scientificity and rationality of ground source heat pump system, a case study of ground source heat pump system in a factory in Beijing was introduced. The project investigation and system design And compared with the measured thermal equilibrium and temperature change of temperature field of rock and soil body within two years of operation, the temperature of inlet and outlet of buried pipe and the heat transfer of one hole per meter. The monitoring results show that the results of rock mass thermal equilibrium analysis basically agree with the results of rock and soil temperature measurement. The actual operating conditions in winter and summer are better than those in testing conditions. The actual heat transfer per meter in single hole is less than that in the same conditions Condition of the anti-launch of single hole extension of heat meters. At the same time, it is further pointed out that the ground source heat pump project should strengthen pre-survey and thermal response testing, post-operation, maintenance and management and long-term monitoring.