水环热泵系统辅助热源容量设计与调控策略  

Design and control strategy of auxiliary heat source capacity for water loop heat pump system

作　　者：于齐东[1] Yu Qidong(School of Environmental Science and Engineering,Tianjin University)

机构地区：[1]天津大学环境科学与工程学院

出　　处：《制冷与空调》2024年第5期15-24,29,共11页Refrigeration and Air-Conditioning

基　　金：住房和城乡建设部研究发展项目(2011-K1-46)。

摘　　要：提出采用工况分析法设计水环热泵系统辅助热源容量,利用循环水能量变化量逆推建立辅助热源容量模型,并以天津地区某办公建筑群为实例,设计3种辅助热源容量方案,采用负荷与水温2种热量调控方案分析辅助热源对系统运行的影响,并采用负荷能耗分析法分析控制方案。测试结果表明:3种辅助热源容量方案均能够保证系统正常运行,按55%负荷率选取设计容量时,系统能效最高;优化中低负荷的供热量、实现机组与辅助热源能量平衡是提升系统能效的关键技术;相比负荷控制,水温调节更适宜水环热泵系统。An analysis method of condition is proposed to design the auxiliary heat source capacity for water loop heat pump system(WLHPs).The auxiliary heat source ca-pacity model is built by using a back-stepping method from energy change of circulating water.Three kinds of auxiliary heat source capacity schemes are designed taking an office building group in Tianjin as example.Two kinds of heat supply control schemes about load and water temperature are used to analyze the effects of auxiliary heat source on the system operation,and these control schemes are analyzed using energy consumption anal-ysis method.The test results show that three kinds of auxiliary heat source capacity schemes all can ensure the system operate normally.The highest energy efficiency of sys-tem can be obtained as the capacity size with heat load of 55%.In addition,some key technologies can be considered to improve the energy efficiency,including optimizing the heat supply in the range of low-rmedium load and arriving at an energy balance between u-nit and auxiliary heat source.Finally,the control of water temperature will be more suit-able for the WLHPs than load control.

关 键 词：水环热泵 辅助热源容量 工况分析法 办公建筑群 调控策略 

分 类 号：TB6[一般工业技术—制冷工程]