基于经济循环水温的土壤源热泵系统地埋管长度的确定  

Determination of the buried pipe length in ground source heat pump system design based on economical recycled water temperature

作　　者：吴志湘[1] 李辽辽 王谦[3] 

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048 [2]西安建工(集团)有限责任公司西安市城市建设开发总公司,陕西西安710065 [3]中国建筑西北设计研究院有限公司,陕西西安710018

出　　处：《西安工程大学学报》2017年第2期209-215,共7页Journal of Xi’an Polytechnic University

摘　　要：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.The current methods on selecting the circulating water temperature of ground heat exchanger of ground source heat pump system are numerous, and the temperature selection range is over 10℃, which directly influences the initial investment and operating cost. To minimize the net present value in the system life cycle, a method determining the buried pipe length based on the economic circulating water temperature was put forward. The discounted value was calculated by the constructed coupling calculation model, on the basis of ensuring the economization and reliability of the system. The optimum circulating water temperature was determined by the model, by which the buried pipe length was worked out. The concrete application process of the method was displayed, taking the ground source heat pump system of a hotel in Xi＇an as an example. The economic circulating water temperature along with the corresponding optimum buried pipe length of the actual system were determined.

关 键 词：土壤源热泵 经济循环水温 计算模型 折现值 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]