北方地区岩土导热系数及换热量的测试研究

岩土导热系数是地源热泵地埋管换热器的重要设计参数;测井单位深度换热量是地埋管换热器系统的设计依据。掌握工程区域岩土的热物性及换热性能,是保证地源热泵系统高效、稳定运行的关键。文章建立了现场测试岩土导热系数及换热量的方法,并结合沈阳浑南高新技术产业开发区某地源热泵工程,测试分析了岩土导热系数和测井单位深度换热量。结果表明,该区域的岩土具有较好的导热能力,适合采用地埋管地源热泵系统;在特殊地理条件下设计地源热泵系统方案前,应对拟建区域的地质条件进行全面勘探,以优选工程区域,为岩土热响应测试结果的可靠性提供保障。

Study on rock-soil thermal conductivity coefficient and heat transfer capacity in north area of China

The rock-soil thermal conductivity coefficient is an important design parameter for borehole heat exchanger of ground source heat pump(GSHP) system,and the heat exchange of unit borehole depth could provide a reference for the design of GSHP.The grasp of rock-soil thermal properties and heat transfer capacity are the prerequisite for stable and efficient operation of the GSHP system.An in-situ measurement method of the rock-soil thermal conductivity and heat transfer capacity was constructed combined with a GSHP actual project in Shenyang hunnan high-tech development zone,and then the rock-soil thermal conductivity and heat exchange of unit borehole depth were analyzed.The results show that the area has a better heat capacity and suitable for GSHP system.Moreover,geological condition of the region plan to build should be explored comprehensively before the design of GSHP system,which could make the preference of project zone and provide the guarantees for test reliability.