空气源热泵热水系统的改进及节能分析  

Improvement and Energy-saving Analysis of Air-source Heat Pump Hot Water System

作　　者：张靖 胡翀赫 梁星宇[1] 曹祥[1,2] 王喜春 张春路[1] ZHANG Jing;HU Chonghe;LIANG Xingyu;CAO Xiang;WANG Xichun;ZHANG Chunlu(School of Mechanical Engineering,Tongji University,Shanghai 201804,China;Postdoctoral Station of Mechanical Engineering,Tongji University,Shanghai 201804,China;Shanghai Yanhua Smartech Group Co.,Ltd.,Shanghai 20060,China;Shanghai DFYH Tech Services Co.,Ltd.,Shanghai 20060,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]同济大学机械工程博士后流动站 [3]上海延华智能科技(集团)股份有限公司 [4]上海东方延华节能技术服务股份有限公司,上海200060

出　　处：《制冷技术》2021年第2期81-84,共4页Chinese Journal of Refrigeration Technology

基　　金：国家重点研发计划(No.2019YFE0100300-21);上海市信息化发展专项资金(No.201901065)。

摘　　要：以某大厦空气源热泵热水系统为实际工程背景,针对原有空气源热泵热水系统存在的混水损失、开停损失、热泵能效不高等问题进行改进,本文设计了一种双温水箱结合梯级加热、部分开停的空气源热泵热水系统。本文利用数值仿真方法搭建了热水系统仿真模型,并对改进前后的热水系统进行节能分析,结果表明:双温水箱方案可以有效减少混水损失,降低热泵冷凝温度,提高机组能效,系统供热能力可提升2%~5%,节能量可达10%~12%;在此基础上引入梯级加热可进一步提升能效,在用水比例高时提升明显,达15%~17%。With the engineering background of a public building,the original air source heat pump system has been improved to reduce the water mixing heat loss and the frequent start stop loss.In this work,an air-source heat pump system with dual-temperature tanks,cascade heating and partial shutdown for water heating is introduced.The system model is developed based on numerical simulation and the energy-saving analysis shows that the dualtemperature tank system can effectively reduce the mixing loss and lower the condensing temperature of the heat pump.The heating capacity of the dual-temperature tank system can be increased by 2%-5%,and the system energy efficiency can be improved by 10%-12%.Besides,the cascade heat pump system performs well during peak load hours which can further improve the energy efficiency by 15%-17%.

关 键 词：空气源热泵 热水系统 双温水箱 梯级加热 

分 类 号：TB611[一般工业技术—制冷工程] TQ051.5[化学工程]