基于?损失分析的太阳能喷射制冷系统性能研究  

Performance study of solar ejector refrigeration system based on exergy loss analysis

作　　者：郑慧凡[1] 张焕好 殷勇高[2] 王永昌 陈银龙[1] 马原青 ZHENG Hui-fan;ZHANG Huan-hao;YIN Yong-gao;WANG Yong-chang;CHEN Yin-long;MA Yuan-qing(School of Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Energy and Environment,Southeast University,Nanjing 210096,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《热科学与技术》2019年第5期398-404,共7页Journal of Thermal Science and Technology

基　　金：国家自然科学青年基金资助项目(51306214);河南省高校科技创新团队支持计划资助项目(19IRTSTHN010);河南省高等学校重点科研资助项目(18A470021)

摘　　要：利用[火用]分析法对太阳能喷射制冷系统[火用]损失随太阳辐射值的变化情况进行分析,了解系统各部件的[火用]损失情况,给出系统总[火用]损失随太阳辐射值变化的规律和系统各部件[火用]损失占系统总[火用]损失的比例随太阳辐射值变化的规律。结果表明:集热器?损失占系统总[火用]损失的比例最大且随太阳辐射值的增加而减小,在太阳辐射值为500~1100 W/m^2时,集热器[火用]损失占系统总[火用]损失的比例为79.28%~81.94%,因此提高集热器效率对降低系统[火用]损失有着至关重要的影响。另外,由于喷射器固有结构的限制,随着发生温度的升高,喷射系数EER、系统性能系数COP并非一直增大,系统存在一个最佳的发生温度;控制发生温度在75℃时,随着太阳辐射值的增大,系统性能系数COP逐渐增大,在太阳辐射值达到600 W/m^2时逐渐变小。The exergy analysis methods used to elaborate the change of exergy loss of a solar ejector refrigeration system with the variation of solar radiation, and the exergy loss of each component in the system is studied. Also, the regularity of both the total exergy lossof the system and the proportion of the exergy loss of each component in the total exergy loss with the variation of solar radiation are obtained. The result shows thatthe proportion of the exergy loss of heat collector accounts for 79.28%-81.94% ofthe total exergy loss of the system, which is the largest part of all components, and it is decreased when solar radiation is increasing between 500-1 100 W/m^2. Therefore, improving the efficiency of heat collector is very important for reducing the system’s exergy loss. In addition, there existan optimal temperature because of the limitation of the inherent structure of the ejector as well as energy efficiency ratio(EER) and coefficient of performance(COP) are not always increasing when the generate temperature rises;when the generate temperature is 75 ℃, the COP gradually rising with the increase of solar radiation, and dwindle gradually when the solar radiation reaches 600 W/m^2.

关 键 词：太阳辐射值 喷射制冷系统 [火用]损失 [火用]分析法 

分 类 号：TK52[动力工程及工程热物理—热能工程]