Exergy analysis of coil-spring turbulators inserted in the horizontal concentric tubes

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dc.authorid0000-0002-3720-8353
dc.contributor.authorEren, Haydar
dc.contributor.authorÇelik, Nevin
dc.contributor.authorKurtbaş, İrfan
dc.contributor.authorYıldız, Seyba
dc.date.accessioned2019-05-10T09:38:57Z
dc.date.available2019-05-10T09:38:57Z
dc.date.issued2010
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü
dc.description.abstractIn this study, to obtain definitive information about the effects of spring-type turbulators located in the inner pipe of a concentric heat exchanger, the rates of exergy transfer Nusselt number (Nue) and exergy loss (E*) were obtained. The results were parametrized by the Reynolds number (2500<Re<12,000), the outer diameter of the spring (Ds =7.2 mm, 9.5 mm, 12 mm, and 13 mm), the number of the springs (n=4, 5, and 6), and the incline angle of the spring (?=0 deg, 7 deg, and 10 deg). It is found that increasing those parameters results in a significant augmentation on exergy transfer comparative to the results of a smooth empty tube. A new term, exergy transfer Nusselt number, is derived in this paper. This term includes both irreversibility due to temperature gradient on the heat transfer surface and irreversibility due to pressure loss of the system. Hence, it is observed that optimum values of independent parameters for a constant surface temperature tube can be determined by this value. With regard to the maintained data, the irreversibility of heat transfer and pressure loss increases with increasing Re. However, at a certain value of Re, the increment rate of the irreversibility of heat transfer decreases, while the increment rate of the irreversibility of pressure loss increases. These results will contribute to adjust the system parameters such as the pump power and other independent parameters more easily. Copyright © 2010 by ASME.
dc.identifier.citationEren, H., Çelik, N., Kurtbaş, İ., Yıldız S. (2010). Exergy analysis of coil-spring turbulators inserted in the horizontal concentric tubes. Journal of Heat Transfer, 132(10), 1-10.
dc.identifier.doi10.1115/1.4001926
dc.identifier.endpage10en_US
dc.identifier.issn0022-1481
dc.identifier.issue10en_US
dc.identifier.scopusqualityN/A
dc.identifier.startpage1en_US
dc.identifier.urihttps://doi.org/10.1115/1.4001926
dc.identifier.urihttps://hdl.handle.net/11491/562
dc.identifier.volume132en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.relation.ispartofJournal of Heat Transfer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectExergy Transferen_US
dc.subjectHeat Exchangersen_US
dc.subjectHeat Transfer Enhancementen_US
dc.subjectSpring Turbulatoren_US
dc.titleExergy analysis of coil-spring turbulators inserted in the horizontal concentric tubes
dc.typeArticle

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