Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation
Heat transfer enhancement techniques are accompanied by pressure drop amplification, detrimentally affecting their performance; entropy generation analysis is an effective approach to assess heat transfer enhancement along with resulting pressure drop. Current study investigates and compares the per...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Energy Nexus |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772427122001097 |
| _version_ | 1811201577434742784 |
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| author | Shahriyar Ghazanfari Holagh Mohammad Ali Abdous Hamidreza Rastan Mahmood Shafiee Mehran Hashemian |
| author_facet | Shahriyar Ghazanfari Holagh Mohammad Ali Abdous Hamidreza Rastan Mahmood Shafiee Mehran Hashemian |
| author_sort | Shahriyar Ghazanfari Holagh |
| collection | DOAJ |
| description | Heat transfer enhancement techniques are accompanied by pressure drop amplification, detrimentally affecting their performance; entropy generation analysis is an effective approach to assess heat transfer enhancement along with resulting pressure drop. Current study investigates and compares the performance of micro-fin (as a passive enhancement technique) and smooth tubes during flow condensation (for R134a refrigerant) through conducting entropy generation analysis. First, the impact of geometrical and operating variables on pressure losses and heat transfer contributions to entropy generation and total generated entropy inside both types of tubes is examined. Then, the conditions at which the application of micro-fin tubes in lieu of smooth ones is justifiable and of superior performance are identified utilizing entropy generation number. The simulation results indicate that entropy generation enhances in the micro-fin tubes as tube diameter, mass velocity, vapor quality, and wall heat flux rise, and saturation temperature declines. The same is observed in the smooth tube except for the mass velocity; an increase in this parameter leads to a decreasing-increasing trend in entropy generation. Moreover, the entropy generation number results indicate that applying micro-fin tubes rather than smooth ones is justifiable, i.e., has better performance, at lower mass velocities and vapor qualities, but higher saturation temperatures and wall heat fluxes. |
| first_indexed | 2024-04-12T02:23:59Z |
| format | Article |
| id | doaj.art-01271a6ee5684dd7afc57ba4988dd25e |
| institution | Directory Open Access Journal |
| issn | 2772-4271 |
| language | English |
| last_indexed | 2024-04-12T02:23:59Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Nexus |
| spelling | doaj.art-01271a6ee5684dd7afc57ba4988dd25e2022-12-22T03:52:02ZengElsevierEnergy Nexus2772-42712022-12-018100154Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensationShahriyar Ghazanfari Holagh0Mohammad Ali Abdous1Hamidreza Rastan2Mahmood Shafiee3Mehran Hashemian4School of Mechanical Engineering, Iran University of Science and Technology, Tehran, IranSchool of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran; Corresponding author.Department of Energy Technology, KTH Royal Institute of Technology, Stockholm SE-100 44, SwedenGroup of Mechanical Engineering, School of Engineering and Digital Arts, University of Kent, Canterbury, United KingdomDepartment of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, IranHeat transfer enhancement techniques are accompanied by pressure drop amplification, detrimentally affecting their performance; entropy generation analysis is an effective approach to assess heat transfer enhancement along with resulting pressure drop. Current study investigates and compares the performance of micro-fin (as a passive enhancement technique) and smooth tubes during flow condensation (for R134a refrigerant) through conducting entropy generation analysis. First, the impact of geometrical and operating variables on pressure losses and heat transfer contributions to entropy generation and total generated entropy inside both types of tubes is examined. Then, the conditions at which the application of micro-fin tubes in lieu of smooth ones is justifiable and of superior performance are identified utilizing entropy generation number. The simulation results indicate that entropy generation enhances in the micro-fin tubes as tube diameter, mass velocity, vapor quality, and wall heat flux rise, and saturation temperature declines. The same is observed in the smooth tube except for the mass velocity; an increase in this parameter leads to a decreasing-increasing trend in entropy generation. Moreover, the entropy generation number results indicate that applying micro-fin tubes rather than smooth ones is justifiable, i.e., has better performance, at lower mass velocities and vapor qualities, but higher saturation temperatures and wall heat fluxes.http://www.sciencedirect.com/science/article/pii/S2772427122001097Entropy generation analysisMicro-fin tubeEntropy generation numberHeat transfer enhancementPressure dropCondensation |
| spellingShingle | Shahriyar Ghazanfari Holagh Mohammad Ali Abdous Hamidreza Rastan Mahmood Shafiee Mehran Hashemian Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation Energy Nexus Entropy generation analysis Micro-fin tube Entropy generation number Heat transfer enhancement Pressure drop Condensation |
| title | Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| title_full | Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| title_fullStr | Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| title_full_unstemmed | Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| title_short | Performance analysis of micro-fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| title_sort | performance analysis of micro fin tubes compared to smooth tubes as a heat transfer enhancement technique for flow condensation |
| topic | Entropy generation analysis Micro-fin tube Entropy generation number Heat transfer enhancement Pressure drop Condensation |
| url | http://www.sciencedirect.com/science/article/pii/S2772427122001097 |
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