Performance and Dimensions Determination of an Ejector Utilized in Ejector Cooling Cycle with Eco-Friendly Working Fluids

Q2 Environmental Science

Evergreen Pub Date : 2023-09-01 DOI:10.5109/7151695

Bharat Sharma, Gulshan Sachdeva

{"title":"Performance and Dimensions Determination of an Ejector Utilized in Ejector Cooling Cycle with Eco-Friendly Working Fluids","authors":"Bharat Sharma, Gulshan Sachdeva","doi":"10.5109/7151695","DOIUrl":null,"url":null,"abstract":": In order to assess the ejector cooling cycle performance and the ejector dimensions, a one-dimensional ejector model is proposed in this paper. The velocity and pressure inside the ejector are examined using thermodynamic governing equations for the eco-friendly working fluids, presuming them as ideal gases. Using conservation of mass, momentum, and energy, the system performance is evaluated. The coefficient of performance (COP) describes the cycle performance, while ejector performance is evaluated in terms of entrainment ratio (ER), mixing area ratio AR Mix and primary nozzle area ratio AR Nozzle . The performance of the cycle is found to improve with the increase in generator and evaporator temperatures, and the decrease in condenser temperature. The area ratios also followed the same trend with the variation of these parameters. At the designed cooling load of 1 kW, the coefficient of performance is found to be 0.182 for R1234ze and 0.061 for R1234yf; and the entrainment ratio of the ejector is 0.237 for R1234ze and 0.08 for R1234yf. As the temperature of the evaporator is increased from 0 to 10℃, the COP is found to rise by 41.41% and 35.56% for R1234ze and R1234yf, respectively. The COP is increased by 6.63% and 40.98% for R1234ze and R1234yf, respectively when the degree of superheat in the generator is enhanced from 2℃ to 6℃ at constant 3000kPa generator pressure.","PeriodicalId":12085,"journal":{"name":"Evergreen","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Evergreen","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5109/7151695","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Environmental Science","Score":null,"Total":0}

引用次数: 0

Abstract

: In order to assess the ejector cooling cycle performance and the ejector dimensions, a one-dimensional ejector model is proposed in this paper. The velocity and pressure inside the ejector are examined using thermodynamic governing equations for the eco-friendly working fluids, presuming them as ideal gases. Using conservation of mass, momentum, and energy, the system performance is evaluated. The coefficient of performance (COP) describes the cycle performance, while ejector performance is evaluated in terms of entrainment ratio (ER), mixing area ratio AR Mix and primary nozzle area ratio AR Nozzle . The performance of the cycle is found to improve with the increase in generator and evaporator temperatures, and the decrease in condenser temperature. The area ratios also followed the same trend with the variation of these parameters. At the designed cooling load of 1 kW, the coefficient of performance is found to be 0.182 for R1234ze and 0.061 for R1234yf; and the entrainment ratio of the ejector is 0.237 for R1234ze and 0.08 for R1234yf. As the temperature of the evaporator is increased from 0 to 10℃, the COP is found to rise by 41.41% and 35.56% for R1234ze and R1234yf, respectively. The COP is increased by 6.63% and 40.98% for R1234ze and R1234yf, respectively when the degree of superheat in the generator is enhanced from 2℃ to 6℃ at constant 3000kPa generator pressure.

查看原文本刊更多论文

采用环保工质的喷射器冷却循环的性能和尺寸测定

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Evergreen Environmental Science-Management, Monitoring, Policy and Law

CiteScore

4.30

自引率

0.00%

发文量

期刊介绍： “Evergreen - Joint Journal of Novel Carbon Resource Sciences & Green Asia Strategy” is a refereed international open access online journal, serving researchers in academic and research organizations and all practitioners in the science and technology to contribute to the realization of Green Asia where ecology and economic growth coexist. The scope of the journal involves the aspects of science, technology, economic and social science. Namely, Novel Carbon Resource Sciences, Green Asia Strategy, and other fields related to Asian environment should be included in this journal. The journal aims to contribute to resolve or mitigate the global and local problems in Asia by bringing together new ideas and developments. The editors welcome good quality contributions from all over the Asia.