{"title":"Hysteresis Phenomena at Boiling in Liquid Film Flowing down the Tubes with Microarc Oxidation Coating","authors":"A. N. Pavlenko, A. I. Kataev, I. B. Mironova","doi":"10.1134/S1810232824030019","DOIUrl":null,"url":null,"abstract":"<p>A study of heat transfer at evaporation and boiling in liquid film flowing down the horizontal tube bundle in tube-and-shell evaporator is reported. This bundle includes duralumin tubes with micro-arc oxidizing (MAO) treatment, which heat transfer characteristics are the subject of conducted tests. Refrigerant R21 at the pressure of <span>\\(\\sim\\)</span>3 bar of absolute pressure is used as working liquid. Hot water pumped through bundle tubes used as a heat carrier. The boiling curves obtained for the tested tubes with MAO treatment showed considerable heat transfer enhancement in comparison with plain tube; however, hysteresis phenomena due to a porous structure of micro-arc oxidizing coatings are revealed. These phenomena should be taken into account at operating heat transfer equipment.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232824030019","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A study of heat transfer at evaporation and boiling in liquid film flowing down the horizontal tube bundle in tube-and-shell evaporator is reported. This bundle includes duralumin tubes with micro-arc oxidizing (MAO) treatment, which heat transfer characteristics are the subject of conducted tests. Refrigerant R21 at the pressure of \(\sim\)3 bar of absolute pressure is used as working liquid. Hot water pumped through bundle tubes used as a heat carrier. The boiling curves obtained for the tested tubes with MAO treatment showed considerable heat transfer enhancement in comparison with plain tube; however, hysteresis phenomena due to a porous structure of micro-arc oxidizing coatings are revealed. These phenomena should be taken into account at operating heat transfer equipment.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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