闭式地表水源热泵系统的应用与分析

Application and Analysis on Closed-loop Surface Water Heat Pump System

闭式地表水源热泵系统有着广泛的应用前景,但目前仍受到一些因素的制约。为此,本文通过对闭式与开式地表水源热泵系统进行对比分析,指出了闭式系统比开式系统有着更大的优势和应用范围。此外,对几种闭式地表水换热器进行了现场实验研究,得到了各自的单位管长换热量和单位面积换热量,可知U型管换热器换热能力最优。最后,本文分析了闭式地表水源热泵系统的传热过程及系统运行对水体生态环境的影响,指出在进行地表水源热泵系统设计前必须进行水文勘测。

closed-loop surface water heat pump system has wide application prospect but is still restricted at present.In this paper,through the comparison and analysis of closed-loop and open-loop surface water heat pump systems,the advantages and application scope of the closed-loop system were presented.In addition,field test research on some closed-loop surface water heat exchangers were carried out,and unit pipe length and unit area heat exchange capacities were obtained respectively.Based on the discussion,it was indicated that the heat exchange capacity of U-shape pipe heat exchanger was the best.At last,the heat transfer process of closed-loop surface water heat pump system and the influence of system operation on water ecological environment were analyzed,it was pointed out that the hydrological survey must be conducted before the water heat pump system design.