{"title":"颗粒表面粗糙度对围绕热交换器管流动的颗粒传热特性的影响","authors":"Yaopeng Li, Peng Sun, Zhihao Hu, Xiaohui Gong, Xiaomei Sun, Bin Zheng","doi":"10.1016/j.icheatmasstransfer.2024.107761","DOIUrl":null,"url":null,"abstract":"<div><p>High-temperature solid particles contain relatively rich waste heat resources, and the moving bed heat exchanger has a significant advantage in the direct contact of particles to extract heat. Considering the varying surface roughness of the actual particles, the effect of particle surface roughness on heat exchange in heat exchanger tubes should not be neglected. To this end, a coupled CFD-DEM computational model of high-temperature solid particles flowing around a single heat exchanger tube is established, and the effect of particle surface roughness on heat transfer from a single heat exchanger tube is analyzed. The results show that <em>f</em><sub>s</sub> (static friction coefficient between particles) has a more significant effect on the heat transfer performance than <em>f</em><sub>r</sub> (rolling friction coefficient between particles). The mean heat transfer coefficients of the heat exchanger tube decrease with increasing <em>f</em><sub>s</sub>. When the <em>f</em><sub>s</sub> increases from 0.05 to 0.3, the mean heat transfer coefficients of the single tube decreases from 239.99 W/(m<sup>2</sup>∙K) to 234.59 W/(m<sup>2</sup>∙K), with a decrease of 2.25%. The <em>f</em><sub>r</sub> has little effect on the heat transfer of high temperature solid particles flowing around the heat exchanger tube.</p></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":6.4000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of particle surface roughness on heat transfer properties of particles flowing around the heat exchanger tube\",\"authors\":\"Yaopeng Li, Peng Sun, Zhihao Hu, Xiaohui Gong, Xiaomei Sun, Bin Zheng\",\"doi\":\"10.1016/j.icheatmasstransfer.2024.107761\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>High-temperature solid particles contain relatively rich waste heat resources, and the moving bed heat exchanger has a significant advantage in the direct contact of particles to extract heat. Considering the varying surface roughness of the actual particles, the effect of particle surface roughness on heat exchange in heat exchanger tubes should not be neglected. To this end, a coupled CFD-DEM computational model of high-temperature solid particles flowing around a single heat exchanger tube is established, and the effect of particle surface roughness on heat transfer from a single heat exchanger tube is analyzed. The results show that <em>f</em><sub>s</sub> (static friction coefficient between particles) has a more significant effect on the heat transfer performance than <em>f</em><sub>r</sub> (rolling friction coefficient between particles). The mean heat transfer coefficients of the heat exchanger tube decrease with increasing <em>f</em><sub>s</sub>. When the <em>f</em><sub>s</sub> increases from 0.05 to 0.3, the mean heat transfer coefficients of the single tube decreases from 239.99 W/(m<sup>2</sup>∙K) to 234.59 W/(m<sup>2</sup>∙K), with a decrease of 2.25%. The <em>f</em><sub>r</sub> has little effect on the heat transfer of high temperature solid particles flowing around the heat exchanger tube.</p></div>\",\"PeriodicalId\":332,\"journal\":{\"name\":\"International Communications in Heat and Mass Transfer\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.4000,\"publicationDate\":\"2024-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Communications in Heat and Mass Transfer\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0735193324005232\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Communications in Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0735193324005232","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
Effects of particle surface roughness on heat transfer properties of particles flowing around the heat exchanger tube
High-temperature solid particles contain relatively rich waste heat resources, and the moving bed heat exchanger has a significant advantage in the direct contact of particles to extract heat. Considering the varying surface roughness of the actual particles, the effect of particle surface roughness on heat exchange in heat exchanger tubes should not be neglected. To this end, a coupled CFD-DEM computational model of high-temperature solid particles flowing around a single heat exchanger tube is established, and the effect of particle surface roughness on heat transfer from a single heat exchanger tube is analyzed. The results show that fs (static friction coefficient between particles) has a more significant effect on the heat transfer performance than fr (rolling friction coefficient between particles). The mean heat transfer coefficients of the heat exchanger tube decrease with increasing fs. When the fs increases from 0.05 to 0.3, the mean heat transfer coefficients of the single tube decreases from 239.99 W/(m2∙K) to 234.59 W/(m2∙K), with a decrease of 2.25%. The fr has little effect on the heat transfer of high temperature solid particles flowing around the heat exchanger tube.
期刊介绍:
International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.