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土壤源热泵系统中地埋管换热器的循环水温现行选择方法较多、且温度选择范围高达10℃以上,直接影响了热泵系统的初投资和运行费用.为使系统寿命周期内净现值最小,提出一种基于经济循环水温的地埋管长度确定方法,通过建立系统耦合计算模型及折现值计算,在保证系统的经济性与可靠性的基础上,找出最佳循环水温,并由此确定系统相应的地埋管长度.同时,以西安市某宾馆土壤源热泵系统为例演示了该方法的具体应用,确定出该工程应选择的经济循环水温及对应的最佳地埋管长度.
In the ground-source heat pump system, the circulating water temperature of the ground-tube heat exchanger has many selection methods and the temperature range is over 10 ℃, which directly affects the initial investment and operating cost of the heat pump system. In order to make the net present value The paper proposes a method to determine the length of buried pipe based on the economic circulating water temperature. By establishing the system coupling calculation model and calculating the discounted value, the optimal circulating water temperature is found based on the economic and reliability of the system Thus the corresponding buried pipe length of the system is determined.At the same time, taking a ground source heat pump system in a hotel in Xi’an as an example, the concrete application of this method is demonstrated, and the optimal economic cycle water temperature and the corresponding optimal buried pipe length.