现代地质Issue(5)：1046-1052,7.
北京平原区地源热泵换热能力现场测试研究
Research on Heat Exchange Ability of Ground-Source Heat Pump by Field Test of Beijing Plain
摘要
Abstract
Rock and soil mass not only influences the distribution features of ground temperature field,but also is the key factor of evaluation of shallow geothermal energy resources and engineering design.To obtain the ther-mal properties and heat transfer performance of local rock and soil is the lynchpin to guarantee the efficient and stable operation of the heat pump.According to the field test results of heat exchange performance of ground-source heat pump projects under construction in Beijing,we study the effects of integrated thermal conductivity by stratum structure,lithology,hydro-geological conditions and backfill material.The results showed that it’s beneficial to improve the heat transfer performance of the system by means of selecting appropriate backfill mate-rials under the same conditions.The heat exchange performance of bentonite and cement as backfill material is improved by 17.6% and 19.7% respectively compared with fine sand.It can be concluded that the rock-soil mass and groundwater are the substance bases of accumulation and spread of thermal energy.The groundwater and strata texture determine the distribution pattern of geo-temperature field and heat transfer efficiency.There is a direct relationship between heat transfer efficiency of ground heat exchanger with soil particles,groundwater table and groundwater seepage.The larger soil particles become,the less groundwater depth gets.The seepage velocity has obvious invigoration effect on the heat transfer efficiency of ground heat exchanger.关键词
浅层地温能/综合热导率/热响应/地源热泵/北京平原区Key words
shallow geothermal energy/integrated thermal conductivity/thermal response/ground source heat pump/Beijing plain分类
天文与地球科学引用本文复制引用
栾英波,卫万顺,于盢,杨俊伟..北京平原区地源热泵换热能力现场测试研究[J].现代地质,2014,(5):1046-1052,7.基金项目
北京市优秀人才资助项目（2010D00201100002）；中国地质调查局项目“浅层地温能开发利用关键技术研究”（1212011220841）；北京平原区浅层地温能资源地质勘查项目（pxm2006000043289）。 （）
