{"title":"Evaporation and Boiling Heat Transfer at Film Irrigation of Horizontal Roughened Tubes","authors":"A. N. Pavlenko, A. I. Kataev, I. B. Mironova","doi":"10.1134/S181023282304001X","DOIUrl":null,"url":null,"abstract":"<p>Industrial shell and tube heat exchangers require often pipes of considerable length. The surface treatment of such tubes to enhance heat transfer parameters of the equipment must be cheap and simple in manufacturing. Two kinds of tube surface treatment are compared: sandblasting and machining. The tubes with OD = 10 mm, ID = 6 mm, and 625 mm long were tested within a bundle of horizontal tubes installed in a rectangular evaporator shell. Hot water pumped through bundle tubes used as a heat carrier. Refrigerant R21 at the pressure of <span>\\(\\sim\\)</span>3 bara is used as working liquid. Tests have been performed at <span>\\(Re\\)</span> numbers from 500 to 1500. The micro-rough tubes (machined duralumin tube, sandblasted copper tube) provide considerable heat transfer enhancement at transition to bubble boiling. At low heat fluxes (evaporation regime) heat transfer on these tubes are close to plain tubes.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"32 4","pages":"657 - 671"},"PeriodicalIF":1.3000,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S181023282304001X","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Industrial shell and tube heat exchangers require often pipes of considerable length. The surface treatment of such tubes to enhance heat transfer parameters of the equipment must be cheap and simple in manufacturing. Two kinds of tube surface treatment are compared: sandblasting and machining. The tubes with OD = 10 mm, ID = 6 mm, and 625 mm long were tested within a bundle of horizontal tubes installed in a rectangular evaporator shell. Hot water pumped through bundle tubes used as a heat carrier. Refrigerant R21 at the pressure of \(\sim\)3 bara is used as working liquid. Tests have been performed at \(Re\) numbers from 500 to 1500. The micro-rough tubes (machined duralumin tube, sandblasted copper tube) provide considerable heat transfer enhancement at transition to bubble boiling. At low heat fluxes (evaporation regime) heat transfer on these tubes are close to plain tubes.
期刊介绍：
Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
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