Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods
This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generat...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Semnan University
2020-05-01
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| Series: | Journal of Heat and Mass Transfer Research |
| Subjects: | |
| Online Access: | https://jhmtr.semnan.ac.ir/article_4261_c5a9367986ad7290b8762f52a9298c16.pdf |
| _version_ | 1797259624213118976 |
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| author | Rahim Hassanzadeh Sohail Nasrollahzadeh |
| author_facet | Rahim Hassanzadeh Sohail Nasrollahzadeh |
| author_sort | Rahim Hassanzadeh |
| collection | DOAJ |
| description | This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diameters of d/H=0.3, 0.4, and 0.5. Computations have been carried out numerically by means of the finite volume approach under different Dean numbers (De) ranging from 500 to 1500 in the laminar regime. The flow physics within the advanced spiral heat exchanger model has been discussed using several velocity and temperature contours. It was found that by inserting the continuous vortex generators in the cross-stream plane of a spiral plate heat exchanger, the unsteady flow develops within the channel in which the rate of unsteadiness is proportional to d/H and De directly and to azimuth angle inversely. The maximum heat transfer enhancement with respect to the conventional spiral plate heat exchanger (without continuous vortex generators) is found to be 341% for α=30◦, d/H=0.5, and De=1500. Additionally, values of pressure drop penalty and thermal-hydraulic performance have been determined accordingly. |
| first_indexed | 2024-04-24T23:12:23Z |
| format | Article |
| id | doaj.art-303deb23621940c2bdd47d563ee17f0f |
| institution | Directory Open Access Journal |
| issn | 2345-508X 2383-3068 |
| language | English |
| last_indexed | 2024-04-24T23:12:23Z |
| publishDate | 2020-05-01 |
| publisher | Semnan University |
| record_format | Article |
| series | Journal of Heat and Mass Transfer Research |
| spelling | doaj.art-303deb23621940c2bdd47d563ee17f0f2024-03-17T08:03:54ZengSemnan UniversityJournal of Heat and Mass Transfer Research2345-508X2383-30682020-05-0171395310.22075/jhmtr.2020.18783.12514261Heat transfer enhancement in a spiral plate heat exchanger model using continuous rodsRahim Hassanzadeh0Sohail Nasrollahzadeh1Faculty of Mechanical Engineering, Urmia University of Technology, Urmia, IranFaculty of Mechanical Engineering, Urmia University of Technology, Urmia, IranThis study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diameters of d/H=0.3, 0.4, and 0.5. Computations have been carried out numerically by means of the finite volume approach under different Dean numbers (De) ranging from 500 to 1500 in the laminar regime. The flow physics within the advanced spiral heat exchanger model has been discussed using several velocity and temperature contours. It was found that by inserting the continuous vortex generators in the cross-stream plane of a spiral plate heat exchanger, the unsteady flow develops within the channel in which the rate of unsteadiness is proportional to d/H and De directly and to azimuth angle inversely. The maximum heat transfer enhancement with respect to the conventional spiral plate heat exchanger (without continuous vortex generators) is found to be 341% for α=30◦, d/H=0.5, and De=1500. Additionally, values of pressure drop penalty and thermal-hydraulic performance have been determined accordingly.https://jhmtr.semnan.ac.ir/article_4261_c5a9367986ad7290b8762f52a9298c16.pdfspiral plate heat exchangercontinuous vortex generatorsheat transfer enhancementunsteady flow |
| spellingShingle | Rahim Hassanzadeh Sohail Nasrollahzadeh Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods Journal of Heat and Mass Transfer Research spiral plate heat exchanger continuous vortex generators heat transfer enhancement unsteady flow |
| title | Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| title_full | Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| title_fullStr | Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| title_full_unstemmed | Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| title_short | Heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| title_sort | heat transfer enhancement in a spiral plate heat exchanger model using continuous rods |
| topic | spiral plate heat exchanger continuous vortex generators heat transfer enhancement unsteady flow |
| url | https://jhmtr.semnan.ac.ir/article_4261_c5a9367986ad7290b8762f52a9298c16.pdf |
| work_keys_str_mv | AT rahimhassanzadeh heattransferenhancementinaspiralplateheatexchangermodelusingcontinuousrods AT sohailnasrollahzadeh heattransferenhancementinaspiralplateheatexchangermodelusingcontinuousrods |