北京平原区地源热泵换热能力现场测试研究

现代地质 ›› 2014, Vol. 28 ›› Issue (5): 1046-1052.

北京平原区地源热泵换热能力现场测试研究

栾英波¹，卫万顺^1,2，于湲³，杨俊伟^1,2

(1.北京市地质矿产勘查开发局，北京100195；2.中国地质调查局浅层地温能推广中心，北京100195； 3.北京市地质勘察技术院，北京102218)

出版日期:2014-10-25 发布日期:2014-12-29
作者简介:栾英波，男，高级工程师，1973年出生，地质矿产勘查专业，主要从事基础地质、城市地质、浅层地温资源研究。 Email:lybdkch@126.com。
基金资助:
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)。

Research on Heat Exchange Ability of Ground-Source Heat Pump by Field Test of Beijing Plain

LUAN Ying-bo¹, WEI Wan-shun^1,2, YU Yuan³，YANG Jun-wei^1,2

(1.Beijing Geological Mineral Exploration and Development Bureau, Beijing100195, China；2.Shallow Geothermal Energy Research and Extension Center,China Geological Survey,Beijing100195,China；3.Beijing Institute of Geo-exploration Technology, Beijing102218, China)

Online:2014-10-25 Published:2014-12-29

摘要/Abstract

摘要：

岩土体不仅决定地温场的展布形态，而且也是浅层地温能资源评价和工程设计的关键因素，掌握区域岩土体的热物性及换热性能，是保障热泵高效稳定运行的关键。根据北京地区在施地源热泵工程对现场换热能力测试结果，系统地研究了地层结构及岩性、水文地质条件、回填材料等因素对综合热导率的影响。研究结果表明：在相同条件下选择适当回填材料有利于提高系统换热性能，膨润土和水泥基作为回填材料,比中细砂作为回填材料的换热性能分别提高了17.6%和19.7%；岩土体和地下水是热能赋存和传播的物质基础，地下水与地层结构决定着地温场分布形态和换热效率，地埋管换热器的换热能力与土壤颗粒、地下水位、地下水渗流存在直接关系，土壤颗粒越大，地下水位埋深越浅，渗流越快，对地埋管换热器换热能力具有明显的强化作用。

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

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 thermal 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 materials 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.

Key words: shallow geothermal energy, integrated thermal conductivity, thermal response, ground source heat pump, Beijing plain

中图分类号:

P641

栾英波，卫万顺，于湲，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, 28(5): 1046-1052.

LUAN Ying-bo，WEI Wan-shun，YU Yuan，YANG Jun-wei. Research on Heat Exchange Ability of Ground-Source Heat Pump by Field Test of Beijing Plain[J]. Geoscience, 2014, 28(5): 1046-1052.

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