Designing of low cost solar air heater equipped with roughness of streamlined cross-section
In the current investigation an attempt is made to design a low cost solar air heater (SAH) using numerical simulation and exergy analysis approach. The thermo-hydraulic behaviour of SAH duct (aspect ratio = 10) with rib roughness of rectangular and symmetric half NACA 0020 (reverse orientation) cro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23002216 |
| _version_ | 1797832713542041600 |
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| author | Sanjeev Kumar Randip Kumar Das Kishor Kulkarni Tabish Alam Sayed M. Eldin |
| author_facet | Sanjeev Kumar Randip Kumar Das Kishor Kulkarni Tabish Alam Sayed M. Eldin |
| author_sort | Sanjeev Kumar |
| collection | DOAJ |
| description | In the current investigation an attempt is made to design a low cost solar air heater (SAH) using numerical simulation and exergy analysis approach. The thermo-hydraulic behaviour of SAH duct (aspect ratio = 10) with rib roughness of rectangular and symmetric half NACA 0020 (reverse orientation) cross-sections on one of its broad walls are analysed numerically. This novel design of the symmetric half NACA 0020 has been tailored to maximise heat transmission by capitalising on the benefits offered by secondary flows. For Reynolds numbers (Re) ranges from 6000 to 18000, fixed relative roughness pitch (P/e = 13), and relative roughness height (e/D = 0.06), the Nusselt number (Nu) and friction factor (f) are calculated. Ribs with NACA 0020 cross-section have higher heat transfer and lower flow friction. With NACA 0020 rib roughness, the maximum thermo-hydraulic performance parameter (THPP) is observed at Re = 6000. Contours of temperature, pressure, turbulence kinetic energy and velocity streamlines provides essential information for explanation of phenomenon in the SAH. Experimental results are used to validate the numerical outcomes. Exergy analysis is also carried out for the comparison of performance of SAH roughened with bluff (rectangular) and streamlined (reverse NACA 0020) roughness elements. |
| first_indexed | 2024-04-09T14:13:23Z |
| format | Article |
| id | doaj.art-ad6f2c3ff1384d78ae3e1037487d2f09 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-09T14:13:23Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-ad6f2c3ff1384d78ae3e1037487d2f092023-05-06T04:37:51ZengElsevierCase Studies in Thermal Engineering2214-157X2023-05-0145102915Designing of low cost solar air heater equipped with roughness of streamlined cross-sectionSanjeev Kumar0Randip Kumar Das1Kishor Kulkarni2Tabish Alam3Sayed M. Eldin4ABES Institute of Technology, Ghaziabad, Uttar Pradesh, India; IIT (ISM), Dhanbad, Jharkhand, IndiaIIT (ISM), Dhanbad, Jharkhand, IndiaMIT, Aurangabad, Maharashtra, India; Corresponding author.CSIR-Central Building Research Institute, Roorkee, 247667, IndiaCenter of Research, Faculty of Engineering, Future University in Egypt New Cairo, 11835, EgyptIn the current investigation an attempt is made to design a low cost solar air heater (SAH) using numerical simulation and exergy analysis approach. The thermo-hydraulic behaviour of SAH duct (aspect ratio = 10) with rib roughness of rectangular and symmetric half NACA 0020 (reverse orientation) cross-sections on one of its broad walls are analysed numerically. This novel design of the symmetric half NACA 0020 has been tailored to maximise heat transmission by capitalising on the benefits offered by secondary flows. For Reynolds numbers (Re) ranges from 6000 to 18000, fixed relative roughness pitch (P/e = 13), and relative roughness height (e/D = 0.06), the Nusselt number (Nu) and friction factor (f) are calculated. Ribs with NACA 0020 cross-section have higher heat transfer and lower flow friction. With NACA 0020 rib roughness, the maximum thermo-hydraulic performance parameter (THPP) is observed at Re = 6000. Contours of temperature, pressure, turbulence kinetic energy and velocity streamlines provides essential information for explanation of phenomenon in the SAH. Experimental results are used to validate the numerical outcomes. Exergy analysis is also carried out for the comparison of performance of SAH roughened with bluff (rectangular) and streamlined (reverse NACA 0020) roughness elements.http://www.sciencedirect.com/science/article/pii/S2214157X23002216Solar air heaterHeat transferFlow frictionPumping power |
| spellingShingle | Sanjeev Kumar Randip Kumar Das Kishor Kulkarni Tabish Alam Sayed M. Eldin Designing of low cost solar air heater equipped with roughness of streamlined cross-section Case Studies in Thermal Engineering Solar air heater Heat transfer Flow friction Pumping power |
| title | Designing of low cost solar air heater equipped with roughness of streamlined cross-section |
| title_full | Designing of low cost solar air heater equipped with roughness of streamlined cross-section |
| title_fullStr | Designing of low cost solar air heater equipped with roughness of streamlined cross-section |
| title_full_unstemmed | Designing of low cost solar air heater equipped with roughness of streamlined cross-section |
| title_short | Designing of low cost solar air heater equipped with roughness of streamlined cross-section |
| title_sort | designing of low cost solar air heater equipped with roughness of streamlined cross section |
| topic | Solar air heater Heat transfer Flow friction Pumping power |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23002216 |
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