海水热泵区域供热的节能判断及影响因素

Critical COP value of heat pump unit for energy-saving in the seawater-source heat pump district heating system and the analysis of its impact factors

摘要:

为判断海水源热泵区域供热系统是否比传统的区域锅炉房供热系统更节能,对这两种区域供热系统的能耗进行对比分析,推导出海水源热泵区域供热机组的制热系数节能临界值的表达式,并据此得到影响海水源热泵区域供热系统节能临界值的3个主要因素:燃煤锅炉房热效率、区域供热系统的供热半径和海水泵的设计参数.结果表明:海水源热泵区域供热机组的制热系数节能临界值可以做为设计者判断该系统是否节能的依据.

Abstract:

In order to judge whether a seawater-source heat pump district heating system(SSHPDHS) is really energy-saving than the conventional boiler-house district heating system(BHDHS),the expression of the critical COP value of the heat pump unit for energy-saving in the SSHPDHS is derived in the paper.Three main factors affecting the energy efficiency of the SSHPDHS are concluded by comparing the energy consumption of the two systems.These factors are the boiler house heating efficiency,the heating district radius and the design parameters of the seawater pump,which are discussed in the context of actual projects.The critical COP value of the heat pump unit for energy-saving is effective on the energy efficiency judgement between the two systems.Also a method to improve the energy efficiency of the SSHPDHS for the system designers is presented here.