Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert
This paper presents a multi-objective experimental study, to enhance the thermal performance of the helically coiled pipe. The main objective of this study is the hydrothermal evaluation of single-phase (water) flow and two-phase flow (air-water) transition through a helically coiled tube at the pre...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-02-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X21008819 |
| _version_ | 1818975856898342912 |
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| author | Mehran Hashemian Samad Jafarmadar Hamdi Ayed Makatar Wae-hayee |
| author_facet | Mehran Hashemian Samad Jafarmadar Hamdi Ayed Makatar Wae-hayee |
| author_sort | Mehran Hashemian |
| collection | DOAJ |
| description | This paper presents a multi-objective experimental study, to enhance the thermal performance of the helically coiled pipe. The main objective of this study is the hydrothermal evaluation of single-phase (water) flow and two-phase flow (air-water) transition through a helically coiled tube at the presence and absence of helically coiled wire. Water flow rate was varied from 2 l/min to 8 l/min and air flow rate was varied from 1 l/min to 5 l/min which makes the volume fraction (VF) range of 0.110–0.714. Thermal-frictional and exergetic behavior of two-phase flow for a helically coiled tube with a helical wire insert have been studied. Results show that in exergy efficiency inside helical tube without turbulator for single-phase flow is 87% higher than when the turbulator is inserted. The second law analysis demonstrated that the exergetic efficiency decreases by the increment of VF and water flow rate. Generally, when pressure drop increment is less important than heat transfer augmentation, simultaneous use of two-phase flow and turbulator is recommended. Conversely, single-phase flow with turbulator is recommended when the desired pressure drop is low. |
| first_indexed | 2024-12-20T16:02:36Z |
| format | Article |
| id | doaj.art-1d4ef47702cf4d86adbc1d642994e0b0 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-20T16:02:36Z |
| publishDate | 2022-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-1d4ef47702cf4d86adbc1d642994e0b02022-12-21T19:34:14ZengElsevierCase Studies in Thermal Engineering2214-157X2022-02-0130101718Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insertMehran Hashemian0Samad Jafarmadar1Hamdi Ayed2Makatar Wae-hayee3Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran; Corresponding author.Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran; Corresponding author.Department of Civil Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia; Corresponding author.Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, 90110, Thailand; Corresponding author.This paper presents a multi-objective experimental study, to enhance the thermal performance of the helically coiled pipe. The main objective of this study is the hydrothermal evaluation of single-phase (water) flow and two-phase flow (air-water) transition through a helically coiled tube at the presence and absence of helically coiled wire. Water flow rate was varied from 2 l/min to 8 l/min and air flow rate was varied from 1 l/min to 5 l/min which makes the volume fraction (VF) range of 0.110–0.714. Thermal-frictional and exergetic behavior of two-phase flow for a helically coiled tube with a helical wire insert have been studied. Results show that in exergy efficiency inside helical tube without turbulator for single-phase flow is 87% higher than when the turbulator is inserted. The second law analysis demonstrated that the exergetic efficiency decreases by the increment of VF and water flow rate. Generally, when pressure drop increment is less important than heat transfer augmentation, simultaneous use of two-phase flow and turbulator is recommended. Conversely, single-phase flow with turbulator is recommended when the desired pressure drop is low.http://www.sciencedirect.com/science/article/pii/S2214157X21008819Helical tubesHeat transfer coefficientPressure dropVolume fraction |
| spellingShingle | Mehran Hashemian Samad Jafarmadar Hamdi Ayed Makatar Wae-hayee Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert Case Studies in Thermal Engineering Helical tubes Heat transfer coefficient Pressure drop Volume fraction |
| title | Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert |
| title_full | Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert |
| title_fullStr | Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert |
| title_full_unstemmed | Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert |
| title_short | Thermal-hydrodynamic and exergetic study of two-phase flow in helically coiled pipe with helical wire insert |
| title_sort | thermal hydrodynamic and exergetic study of two phase flow in helically coiled pipe with helical wire insert |
| topic | Helical tubes Heat transfer coefficient Pressure drop Volume fraction |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X21008819 |
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