基于换热成本的U形地下换热器经济性评估研究

分析地下换热器的埋管方式、钻孔深度、U形管内流体流量及设计进水温度对地下换热器的初投资和热泵运行费用的影响,提出地下换热器单位换热量的换热成本指数的概念,并推导其具体的计算式。利用地下换热器的换热成本指数可以评估不同设计方案的经济性。最后通过计算换热成本指数评估不同设计方案的经济性。

Study on economic assessment of U-tube ground heat exchanger based on heat transfer cost

Analyzes the effect of the choice of buried way of pipe,the design depth of borehole,the design flow of borehole,the design inlet temperature of borehole on the first investment and the running cost of heat pump.Presents the conception for the cost index of heat transfer which can be used to evaluate the economic characteristics of ground heat exchanger,and deduces its specific formula.At last,evaluates the economic characteristics of different design cases by calculating the cost index of heat transfer.