基于高温热泵系统冷媒的过热度模型及分析  

Analysis of the Necessary Superheat Degree Model Based on the Refrigerant of the High-temperature Heat Pump System

作　　者：张彦廷[1] 张晧 王林 徐敬玉 黄鲁蒙[1] 黄峥 张广志 ZHANG Yanting;ZHANG Hao;WANG Lin;XU Jingyu;HUANG Lumeng;HUANG Zheng;ZHANG Guangzhi(Mechanical and Electrical Engineering,China University of Petroleum(East China),Qingdao 266580,China;Institute of Building energy and Thermal Science,Henan University of Science and Technology,Luoyang 471023,China;Shanghai Heimdallr Energy Saving Technology Co.,Ltd,Shanghai 200335,China)

机构地区：[1]中国石油大学(华东)机电工程学院,青岛266580 [2]河南科技大学土木工程学院,洛阳471003 [3]昊姆(上海)节能科技有限公司,上海200335

出　　处：《工程热物理学报》2023年第1期191-198,共8页Journal of Engineering Thermophysics

基　　金：国家重点研究发展计划资助项目(No.2017YFC0804502);研究生创新工程资助项目(No.YCX2019064)。

摘　　要：高温热泵(HTHP)系统往往配合高临界温度冷媒进行工作,但该种冷媒表现出的湿工质特性往往会为系统带来液击风险。现阶段的相关研究已经可以精准校核系统是否出现液击,但并不能有效降低系统的液击风险。通过利用冷媒的压焓特性分别建立无补气压缩机以及补气式压缩机的吸排气过热度模型,在已知环境工况下设立确保压缩机无液击风险的排气过热度,利用模型关系计算压缩前冷媒的吸气过热度来规避系统的液击风险,从而完善HTHP系统的作业工艺,提高整体系统的安全性。在补气式压缩机模型中设置5℃排气过热度,利用该模型精确计算出系统闪蒸压力为0.977 MPa时,冷媒进压缩前的吸气过热度为7.54℃,此时系统的最大COP为3.33,1.08 kg/s冷媒规模性下的蒸汽产量为187.5 kg/h。High temperature heat pump(HTHP)systems often work with high critical temperature refrigerants,but the wet working fluid characteristics of this type of refrigerant often bring the risk of liquid shock to the system.Relevant research at this stage has been able to accurately check whether the system has liquid hammer,but it cannot effectively reduce the risk of liquid hammer in the system.By using the pressure and enthalpy characteristics of the refrigerant,the suction and exhaust superheat models of the non-supplementary compressor and the supplementary compressor are established respectively,and the exhaust superheat that ensures the compressor without the risk of liquid shock is established under known environmental conditions,and the model is used The relationship calculates the superheat of the inhalation of the refrigerant before compression to avoid the risk of liquid shock in the system,thereby improving the operation technology of the HTHP system and improving the safety of the overall system.Set the 5℃exhaust superheat in the supplemental air compressor model,and use this model to accurately calculate that when the system flash pressure is 0.977 MPa,the suction superheat before the refrigerant enters and compresses is 7.54℃,and the maximum COP of the system at this time It is 3.33,and the steam output under the scale of 1.08 kg/s refrigerant is 187.5 kg/h.

关 键 词：高温热泵系统 液击风险 吸排气过热度 工艺完善设计 

分 类 号：TK123[动力工程及工程热物理—工程热物理]