Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger
The present study conducts the numerical investigation of flow characteristics and thermal performance of spiral finned-tube heat exchangers. The effects of location of perforations (90°, 120°, and 150°) on heat transfer and pressure drop are analyzed for the air-side. The...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-02-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/3/556 |
| _version_ | 1798003561692397568 |
|---|---|
| author | Hyung Ju Lee Jaiyoung Ryu Seong Hyuk Lee |
| author_facet | Hyung Ju Lee Jaiyoung Ryu Seong Hyuk Lee |
| author_sort | Hyung Ju Lee |
| collection | DOAJ |
| description | The present study conducts the numerical investigation of flow characteristics and thermal performance of spiral finned-tube heat exchangers. The effects of location of perforations (90°, 120°, and 150°) on heat transfer and pressure drop are analyzed for the air-side. The commercial computational fluid dynamics code ANSYS Fluent (V.17.0) is used for simulations with the RNG <i>k</i>-<i>ε</i> model based on the Reynolds-averaged Navier⁻Stokes equations. The velocity field, Colburn <i>j</i>-factor, and friction factor are analyzed to evaluate the heat transfer and pressure drop characteristics. Because of the flow through the perforations, the boundary layers on the fin surfaces are interrupted. This results in increased flow disturbances close to the fin, and the heat transfer performance increases compared to the reference case. The pressure drop, which is one of the disadvantages of spiral finned tubes comparing to plate or circular fins, decreases with perforations on the fin. Overall, the cases with perforated fin exhibit greater performance of area goodness factor considering the relationship between the heat transfer and the pressure drop. |
| first_indexed | 2024-04-11T12:09:34Z |
| format | Article |
| id | doaj.art-7a567740492e4153a608821901000a30 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:09:34Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7a567740492e4153a608821901000a302022-12-22T04:24:38ZengMDPI AGEnergies1996-10732019-02-0112355610.3390/en12030556en12030556Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat ExchangerHyung Ju Lee0Jaiyoung Ryu1Seong Hyuk Lee2School of Mechanical Engineering, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaSchool of Mechanical Engineering, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaSchool of Mechanical Engineering, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaThe present study conducts the numerical investigation of flow characteristics and thermal performance of spiral finned-tube heat exchangers. The effects of location of perforations (90°, 120°, and 150°) on heat transfer and pressure drop are analyzed for the air-side. The commercial computational fluid dynamics code ANSYS Fluent (V.17.0) is used for simulations with the RNG <i>k</i>-<i>ε</i> model based on the Reynolds-averaged Navier⁻Stokes equations. The velocity field, Colburn <i>j</i>-factor, and friction factor are analyzed to evaluate the heat transfer and pressure drop characteristics. Because of the flow through the perforations, the boundary layers on the fin surfaces are interrupted. This results in increased flow disturbances close to the fin, and the heat transfer performance increases compared to the reference case. The pressure drop, which is one of the disadvantages of spiral finned tubes comparing to plate or circular fins, decreases with perforations on the fin. Overall, the cases with perforated fin exhibit greater performance of area goodness factor considering the relationship between the heat transfer and the pressure drop.https://www.mdpi.com/1996-1073/12/3/556computational fluid dynamics (CFD)finned-tube heat exchangerperforationColburn <i>j</i>-factorfriction factor |
| spellingShingle | Hyung Ju Lee Jaiyoung Ryu Seong Hyuk Lee Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger Energies computational fluid dynamics (CFD) finned-tube heat exchanger perforation Colburn <i>j</i>-factor friction factor |
| title | Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger |
| title_full | Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger |
| title_fullStr | Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger |
| title_full_unstemmed | Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger |
| title_short | Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger |
| title_sort | influence of perforated fin on flow characteristics and thermal performance in spiral finned tube heat exchanger |
| topic | computational fluid dynamics (CFD) finned-tube heat exchanger perforation Colburn <i>j</i>-factor friction factor |
| url | https://www.mdpi.com/1996-1073/12/3/556 |
| work_keys_str_mv | AT hyungjulee influenceofperforatedfinonflowcharacteristicsandthermalperformanceinspiralfinnedtubeheatexchanger AT jaiyoungryu influenceofperforatedfinonflowcharacteristicsandthermalperformanceinspiralfinnedtubeheatexchanger AT seonghyuklee influenceofperforatedfinonflowcharacteristicsandthermalperformanceinspiralfinnedtubeheatexchanger |