竖直U型埋管地热换热器设计的主要因素分析研究

Analytical Study on Vertical U-tube Buried Pipe Geothermal Heat Exchanger Design’s Main Factors

地热换热器设计的主要影响有岩土的导热系数全年的冷热负荷及其相对的比值回填材料的导热系数循环液类型及所允许的最高和最低温度等。通过对每一影响因素的计算分析,明确各个因素对地热换热器传热性能的不同影响,从而降低工程的总投资。为此,地热换热器设计时必须考虑主要因素的影响。

The main effect of the geothermal heat exchanger design are：the thermal conductivity of rock and soil;the cold-hot load and their relative ratio all the year;the thermal conductivity of backfill materials;the type of circulating fluid, the permitted maximum and minimum temperature, et al. By analyzing of each effect factor, definite the different effects of every factor on the heat transfer performance of geothermal heat exchanger,then affecting a total investment of the project. So the design of geothermal heat exchanger must take into account the effect of main factors.