地层热物性原位测试方法及仪器

地层热物性参数是影响地源热泵地下热交换管长度的主要因素。对于大型的垂直埋管热泵系统。需进行现场地层热物性原位测试。可以得到较准的钻孔的地层平均导热系数和钻孔的热阻。BTR-4000型地层热物性原位测试仪为准确设计地源热泵地下埋管长度提供了一种手段。经测试应用，对于垂直埋管地下换热器而言。圆柱源模型比线热源模型的分析解更具有清晰的物理意义和更高的模拟精度。

Apparatus and Method for in-situ Measuring Ground Thermal Properties

Stratum thermal property parameter is a main factor to design the length of ground heat exchanging tube for large scale vertical GSHP system. By in-situ measuring ground thermal property, the average thermal conductivity of stratum and average thermal resistance of hole are obtained accurately. BTR-4000 device is developed for in-situ measuring ground thermal property. The device gave us a new method to design accurately ground heat exchanger. Also it proved that column heat source model is more accurate and more vivid in physics than line heat source model in thermal transfer simulating for vertical ground heat exchanger.