岩土热物性集总热阻计量模型及其求解体系

Ground thermal property lumped thermal resistance metering model and its solution system

由于地埋管周围岩土体状况的复杂性及由此导致的回归分析时统计性误差影响等原因,根据现有岩土热物性传热模型及热响应试验不能精确求解岩土热物性。探讨了消除解释变量性质影响的岩土集总热阻分析方法,并通过计量学误差分析体系进一步建立了岩土集总热阻计量模型,摆脱了相关不确定扰动的复杂影响,将这一传热问题转变为热工计量分析问题,根据逐时集总热阻即可计算出在各种进出口温度及初始土壤温度条件下的逐时单位管长换热量。以多个工程实测结果验证了该模型及其求解体系的有效性。

Because of the complicated ground conditions around the underground pipe and therefore caused statistical errors from the regression analysis, ground thermal properties cannot be accurately solved by using existed heat transfer models and thermal response tests. Discusses the ground lumped thermal resistance analysis method which eliminates the influences of explanatory variables, further establishes a ground lumped thermal resistance metering model by a metrological error analysis system, which gets rid of the complicated influences of relevant uncertain disturbances, and transfers this heat transfer problem to a thermal metering analysis problem, thus makes it easier to calculate the hourly heat exchange per unit tube length under different input and output temperatures and initial soil temperature conditions according to the hourly lumped thermal resistance. The actual measured data analysis results from several projects verify the effectiveness of this model and its solution system.