{"title":"An experimental study on condensation and evaporation heat transfer and pressure drop in microfin copper tubes","authors":"Mujibur Rahman, G. W. Soon","doi":"10.1109/ICEENVIRON.2009.5398662","DOIUrl":null,"url":null,"abstract":"This paper presents the experimental investigation to determine the condensation and evaporation heat transfer coefficients and pressure drops for the flow of R22 through internally grooved copper tubes namely B16-46 and D12-52. A series of experiments were conducted to evaluate the condensation and evaporation performances of the internally grooved copper tubes. Condensation tests were conducted at mass flux rates of 180 to 537 kg m−2 s−1 and the vapor qualities ranged from a nominal value of 83% at the test section inlet to 6% at the outlet. Evaporation tests were conducted at mass flux rates of 110 to 404 kg m−2 s−1 and the nominal vapor qualities at the inlet and outlet were 0 and 85%. For both the condensation and evaporation tests, the heat transfer coefficients and pressure drops are found to increase as the mass flux rate increases.","PeriodicalId":211736,"journal":{"name":"2009 3rd International Conference on Energy and Environment (ICEE)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 3rd International Conference on Energy and Environment (ICEE)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICEENVIRON.2009.5398662","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
This paper presents the experimental investigation to determine the condensation and evaporation heat transfer coefficients and pressure drops for the flow of R22 through internally grooved copper tubes namely B16-46 and D12-52. A series of experiments were conducted to evaluate the condensation and evaporation performances of the internally grooved copper tubes. Condensation tests were conducted at mass flux rates of 180 to 537 kg m−2 s−1 and the vapor qualities ranged from a nominal value of 83% at the test section inlet to 6% at the outlet. Evaporation tests were conducted at mass flux rates of 110 to 404 kg m−2 s−1 and the nominal vapor qualities at the inlet and outlet were 0 and 85%. For both the condensation and evaporation tests, the heat transfer coefficients and pressure drops are found to increase as the mass flux rate increases.
本文对R22通过B16-46和D12-52内槽铜管流动的冷凝蒸发换热系数和压降进行了实验研究。通过一系列实验研究了内槽铜管的冷凝和蒸发性能。冷凝试验在180至537 kg m−2 s−1的质量通量下进行,蒸汽质量从试验段入口的标称值83%到出口的6%不等。蒸发试验在110至404 kg m−2 s−1的质量通量下进行,入口和出口的标称蒸气质量分别为0和85%。在冷凝和蒸发试验中,传热系数和压降都随着质量流率的增加而增加。