跨临界CO_(2)热泵单/双级切换性能优化对比分析  

Comparative analysis of single/two stage switching performance optimization for transcritical CO_(2)heat pumps

作　　者：王亚飞 陈洁 袁建新[3] 夏鸿洲 贺誉京 WANG Yafei;CHEN Jie;YUAN Jianxin;XIA Hongzhou;HE Yujing(School of Electrical Engineering,Xinjiang University,Urumqi 830039,Xinjiang,China;School of Electrical Engineering,Shanghai DianJi University,Shanghai 200120,China;Architectural Engineering Institute,Xinjiang University,Urumqi 830039,Xinjiang,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830039 [2]上海电机学院电气学院,上海200120 [3]新疆大学建筑工程学院,新疆乌鲁木齐830039

出　　处：《化学工程》2024年第4期82-88,共7页Chemical Engineering(China)

基　　金：中央引导地方科技发展专项资金项目(ZYYD2022B11)。

摘　　要：为提高跨临界CO_(2)热泵系统在不同地区采暖的能效和经济性,提出STSHPS(单、双级切换的热泵系统),并与BASE(单级压缩热泵系统)和TSHPS(双级压缩热泵系统)进行对比,通过建立各循环系统的热力学、环境性以及经济性模型,从不同角度进行分析。研究结果表明:设计工况下,环境温度为3℃时,双级压缩系统的C_(OP)(制热性能系数)大于单级压缩系统,即环境温度为3℃可作为单双级切换的条件;在乌鲁木齐采用STSHPS碳排放所造成的成本与BASE相比降低22%;STSHPS在单级压缩运行时采用2台压缩机交替运行的方式,初始成本经过折算与TSHPS相比降低26.9%—66.7%;在设备运行15 a后,3个城市的累计总费用,STSHPS与TSHPS和BASE相比降低5.3%—16.8%和1.8%—13.5%。STSHPS的能效、环保性能以及经济性均是3个系统中最好的,优势比较明显。In order to improve the energy efficiency and economy of transcritical CO,heat pump systems in different regions,STSHPS(single and two stage switching heat pump system)was proposed and compared with BASE(single-stage compression heat pump system)and TSHPS(two-stage compression heat pump system).Analysis was conducted from different angles by establishing thermodynamic,environmental,and economic models of each cycle system.The results show that under the design conditions,when the ambient temperature is 3℃,the C_(op)(coefficient of performance)of the two-stage compression system is greater than that of the single-stage compression system,which means that the ambient temperature of 3℃can be used as a condition for switching between singlestage and two-stage compression systems.In Urumqi,the cost of carbon emissions is reduced by 22%compared to BASE with STSHPS.STSHPS adopts the alternating operation of two compressors during single-stage compression operation,which reduces the initial cost by 26.9%-66.7%compared to TSHPS after conversion.After 15 years of equipment operation,the cumulative total cost of STSHPS in the three cities decreases by 5.3%-16.8%and 1.8%-13.5%compared to TSHPS and BASE.STSHPS has the best energy efficiency,environmental performance,and economy among the three systems,with obvious advantages.

关 键 词：跨临界CO_(2) 热泵 单/双级切换 热力学 环境性 经济性 

分 类 号：TB61[一般工业技术—制冷工程]