【摘要】 提出了一种用于竖直埋管与周围岩土的传热分析模型。该方法回避了其它模型对钻孔中埋管的具体位置、上升管和下降管之间的距离以及埋管和回填材料的物性等参数的要求,从而可以消除上述参数测量带来的误差。在现场钻孔,埋设U型埋管,通过测量施加的加热功率、埋管中循环水流量、埋管出入口水温随时间变化,利用该模型并结合最优化估计方法,确定了某地源热泵空调系统工地地下岩土的热物性参数,检验证实了该方法的实用性和可靠性。更多还原

【Abstract】 To determine deep ground soil conductivity,specific volumetric heat capacity at work site and in other associated engineering application,a heat transfer model was proposed for analyzing heat transfer between vertical buried tube and surrounding soil.This method doesn’t need exact information of the buried tube location in the borehole,spacing between up and down tubes,the properties of the tube and the backfill,and other parameters in the borehole,and accordingly eliminating the errors caused by measuring these parameters mentioned. A site test was conducted to obtain heat flux imposed on the buried loop,circulating water flow rate,temperatures at the outlet and inlet of the loop by an in-situ test apparatus.The model,together with estimation algorithm,was used to determine the thermal properties of the deep ground soil at the worksite.Results show that this method can shorten testing time.更多还原