{"title":"优化螺旋折流板间距提高管壳式换热器低压降传热率","authors":"S. K. Prasad, M. K. Sinha","doi":"10.1134/S1810232823030104","DOIUrl":null,"url":null,"abstract":"<p>Shell and tube heat exchangers are used in factories for heat exchangers. Major issues of these heat exchangers are low heat, low frequency and high-pressure drop. Numerical study of the difference between gap and angle of barrier in volume firth and outlet move medium is determined for variation or movement of pipes to accept flow medium. Each baffle system is considered under the variation of flow medium controlled in the path and heat exchanger. It defines the variation of surface and heat exchanger with the flow of hot and cold fluid in surface and heat exchanger and the number of baffle structures. The number of turn units (NTU), overall heat exchanger coefficient (U) and efficiency (<span>\\(\\varepsilon\\)</span>) are evaluated based on different Reynolds numbers (Rec) on the shell side (17693–30331). On the surface edge of the proposed method, the pressure drop is evaluated as the loss of strength from the system. In addition, the impact of inlet cooling fluid temperature, baffle spacing and baffle cutting ratio (BCR) is analyzed and discussed. As the results in all cases, the proposed configuration significantly increases the efficiency of heat exchangers compared to the other two configurations. The proposed method, reducing the pressure drop by 12.40%–11.22%, increases U, <span>\\(\\varepsilon\\)</span> and NTU by 4.51%, 2.87%–4.51% and 5.78%–8.17% respectively.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"32 3","pages":"532 - 559"},"PeriodicalIF":1.3000,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement of Heat Transfer Rate with a Low-Pressure Drop in Shell and Tube Heat Exchanger through Optimal Spacing of Helical Baffle\",\"authors\":\"S. K. Prasad, M. K. Sinha\",\"doi\":\"10.1134/S1810232823030104\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Shell and tube heat exchangers are used in factories for heat exchangers. Major issues of these heat exchangers are low heat, low frequency and high-pressure drop. Numerical study of the difference between gap and angle of barrier in volume firth and outlet move medium is determined for variation or movement of pipes to accept flow medium. Each baffle system is considered under the variation of flow medium controlled in the path and heat exchanger. It defines the variation of surface and heat exchanger with the flow of hot and cold fluid in surface and heat exchanger and the number of baffle structures. The number of turn units (NTU), overall heat exchanger coefficient (U) and efficiency (<span>\\\\(\\\\varepsilon\\\\)</span>) are evaluated based on different Reynolds numbers (Rec) on the shell side (17693–30331). On the surface edge of the proposed method, the pressure drop is evaluated as the loss of strength from the system. In addition, the impact of inlet cooling fluid temperature, baffle spacing and baffle cutting ratio (BCR) is analyzed and discussed. As the results in all cases, the proposed configuration significantly increases the efficiency of heat exchangers compared to the other two configurations. The proposed method, reducing the pressure drop by 12.40%–11.22%, increases U, <span>\\\\(\\\\varepsilon\\\\)</span> and NTU by 4.51%, 2.87%–4.51% and 5.78%–8.17% respectively.</p>\",\"PeriodicalId\":627,\"journal\":{\"name\":\"Journal of Engineering Thermophysics\",\"volume\":\"32 3\",\"pages\":\"532 - 559\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2023-11-08\",\"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/S1810232823030104\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232823030104","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}
Enhancement of Heat Transfer Rate with a Low-Pressure Drop in Shell and Tube Heat Exchanger through Optimal Spacing of Helical Baffle
Shell and tube heat exchangers are used in factories for heat exchangers. Major issues of these heat exchangers are low heat, low frequency and high-pressure drop. Numerical study of the difference between gap and angle of barrier in volume firth and outlet move medium is determined for variation or movement of pipes to accept flow medium. Each baffle system is considered under the variation of flow medium controlled in the path and heat exchanger. It defines the variation of surface and heat exchanger with the flow of hot and cold fluid in surface and heat exchanger and the number of baffle structures. The number of turn units (NTU), overall heat exchanger coefficient (U) and efficiency (\(\varepsilon\)) are evaluated based on different Reynolds numbers (Rec) on the shell side (17693–30331). On the surface edge of the proposed method, the pressure drop is evaluated as the loss of strength from the system. In addition, the impact of inlet cooling fluid temperature, baffle spacing and baffle cutting ratio (BCR) is analyzed and discussed. As the results in all cases, the proposed configuration significantly increases the efficiency of heat exchangers compared to the other two configurations. The proposed method, reducing the pressure drop by 12.40%–11.22%, increases U, \(\varepsilon\) and NTU by 4.51%, 2.87%–4.51% and 5.78%–8.17% respectively.
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.