地源热泵系统地中集热器强化传热初步研究

Preparatory Study of Heat Transfer Enhancement of Energy Collector Pipe in GSHP System

为了增强地中集热器的换热效果,从强化传热的角度对不同的集热器进行了计算说明并与数值模拟结果进行了比较,结果表明,减小管径可以增强地中集热器的换热效果;从地中集热器的结构、载冷剂的种类与性质、回填材料的选择等几方面进行了理论探讨,进而提出了提高地源热泵系统地中集热器换热效果的措施.

In order to improve the heat transfer efficiency of energy collector pipe, the authors calculate the different energy collectors from the angle of increasing heat transfer efficiency, and compare the calculations with the numeric simulation results. The comparison shows that reducing the pipe radius can improve the heat trasfer efficiency of energy collector. The authors also theoretically analyze the structure of energy collector, types and characteristics of secondary refrigerant and selection of backfilled stuff, and put forward the measures to enhance heat transfer efficiency in GSHP system.