Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger
The main objective of this numerical study is to investigate the ways to reduce the pressure drop and consequently increase thermal performance enhancement factor (TEF) of a heat exchanger equipped with twisted tapes. For this purpose, axial perforated twisted tapes (PTTs) with various hole diameter...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-09-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X17300758 |
| _version_ | 1819231662018396160 |
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| author | Nemat Mashoofi Saman Pourahmad S.M. Pesteei |
| author_facet | Nemat Mashoofi Saman Pourahmad S.M. Pesteei |
| author_sort | Nemat Mashoofi |
| collection | DOAJ |
| description | The main objective of this numerical study is to investigate the ways to reduce the pressure drop and consequently increase thermal performance enhancement factor (TEF) of a heat exchanger equipped with twisted tapes. For this purpose, axial perforated twisted tapes (PTTs) with various hole diameters are used instead of simple twisted tapes (STTs). Moreover, the variations of the effectiveness with number of transfer units (NTU) for different heat capacity ratios (Cr) were presented. The numerical model was well validated with the available experimental results. The results indicated that the use of perforated twisted tape leads to a reduction in pressure drop and heat transfer rate, subsequently; a significant increase in TEF was seen compared to simple twisted tapes. In addition, some correlations were formulated to present the numerical results. |
| first_indexed | 2024-12-23T11:48:31Z |
| format | Article |
| id | doaj.art-8837563a9bd140e9aed90b63c451412a |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-23T11:48:31Z |
| publishDate | 2017-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-8837563a9bd140e9aed90b63c451412a2022-12-21T17:48:16ZengElsevierCase Studies in Thermal Engineering2214-157X2017-09-0110C16116810.1016/j.csite.2017.06.001Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchangerNemat MashoofiSaman PourahmadS.M. PesteeiThe main objective of this numerical study is to investigate the ways to reduce the pressure drop and consequently increase thermal performance enhancement factor (TEF) of a heat exchanger equipped with twisted tapes. For this purpose, axial perforated twisted tapes (PTTs) with various hole diameters are used instead of simple twisted tapes (STTs). Moreover, the variations of the effectiveness with number of transfer units (NTU) for different heat capacity ratios (Cr) were presented. The numerical model was well validated with the available experimental results. The results indicated that the use of perforated twisted tape leads to a reduction in pressure drop and heat transfer rate, subsequently; a significant increase in TEF was seen compared to simple twisted tapes. In addition, some correlations were formulated to present the numerical results.http://www.sciencedirect.com/science/article/pii/S2214157X17300758Double tube heat exchangerAxial perforated twisted tapeThermal performance enhancement factorEffectivenessFriction factorNumerical studies |
| spellingShingle | Nemat Mashoofi Saman Pourahmad S.M. Pesteei Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger Case Studies in Thermal Engineering Double tube heat exchanger Axial perforated twisted tape Thermal performance enhancement factor Effectiveness Friction factor Numerical studies |
| title | Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| title_full | Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| title_fullStr | Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| title_full_unstemmed | Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| title_short | Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| title_sort | study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger |
| topic | Double tube heat exchanger Axial perforated twisted tape Thermal performance enhancement factor Effectiveness Friction factor Numerical studies |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X17300758 |
| work_keys_str_mv | AT nematmashoofi studytheeffectofaxiallyperforatedtwistedtapesonthethermalperformanceenhancementfactorofadoubletubeheatexchanger AT samanpourahmad studytheeffectofaxiallyperforatedtwistedtapesonthethermalperformanceenhancementfactorofadoubletubeheatexchanger AT smpesteei studytheeffectofaxiallyperforatedtwistedtapesonthethermalperformanceenhancementfactorofadoubletubeheatexchanger |