Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis
Solar air heaters (SAHs) often face efficiency limitations due to heat transfer challenges. Integrating roughness elements on the absorber plate is a common strategy, but stationary roughness induces hot spots and thermal wake zones, hindering convective heat transfer. To mitigate these issues, this...
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Elsevier
2025-08-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25006057 |
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| author | Yogeshkumar Khimsuriya D.K. Patel Vivek Patel Vinay Pandit Hashim Sahar Mohaisen Lav Kumar Kaushik Pranav Mehta Himesh Patel |
| author_facet | Yogeshkumar Khimsuriya D.K. Patel Vivek Patel Vinay Pandit Hashim Sahar Mohaisen Lav Kumar Kaushik Pranav Mehta Himesh Patel |
| author_sort | Yogeshkumar Khimsuriya |
| collection | DOAJ |
| description | Solar air heaters (SAHs) often face efficiency limitations due to heat transfer challenges. Integrating roughness elements on the absorber plate is a common strategy, but stationary roughness induces hot spots and thermal wake zones, hindering convective heat transfer. To mitigate these issues, this study investigates a modified SAH with novel rotating spiral-shaped baffles using a 4E framework—energy, exergy, exergoeconomic, and enviroeconomic perspectives. Results demonstrate superior performance, with configurations at P/e = 8 and e/H = 0.8 achieving peak useful heat gains of 156.78 W. The modified SAH attains daily average thermal, exergy, and thermohydraulic efficiencies of 29.55 %, 14.59 %, and 7.24 %, respectively. Exergoeconomic analysis yields a maximum parameter of 0.36 kWh/$ over 30 years, while enviroeconomic assessments indicate a reduction in CO2 emissions from 17.14 to 5.71 kg/year, with carbon credit earnings between $102.86 and $308.57. Future research can further enhance performance through novel storage media, optimized baffle design, intelligent controls, and advanced heat exchangers. |
| format | Article |
| id | doaj-art-c389e6d80b3844b5969156a0a8d062f8 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-c389e6d80b3844b5969156a0a8d062f82025-08-20T03:53:56ZengElsevierCase Studies in Thermal Engineering2214-157X2025-08-017210634510.1016/j.csite.2025.106345Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysisYogeshkumar Khimsuriya0D.K. Patel1Vivek Patel2Vinay Pandit3Hashim Sahar Mohaisen4Lav Kumar Kaushik5Pranav Mehta6Himesh Patel7Gujarat Technological University, Ahmedabad, Gujarat, 382424, India; Gujarat Technological University - Institute of Technology & Research, Mehsana, Gujarat, 382710, IndiaGovernment Engineering College, Patan, Gujarat, 384265, IndiaGujarat Technological University - Institute of Technology & Research, Mehsana, Gujarat, 382710, IndiaIndira Gandhi Engineering College Sagar Madhya Pradesh, 470021, IndiaTechnical College of Engineering, Al-Furat Al-Awsat Technical University, 54001, IraqGujarat Technological University - Institute of Technology & Research, Mehsana, Gujarat, 382710, IndiaDepartment of Mechanical Engineering, Dharmsinh Desai University, Nadiad, 387001, Gujarat, India; Corresponding author.Gujarat Technological University - Institute of Technology & Research, Mehsana, Gujarat, 382710, IndiaSolar air heaters (SAHs) often face efficiency limitations due to heat transfer challenges. Integrating roughness elements on the absorber plate is a common strategy, but stationary roughness induces hot spots and thermal wake zones, hindering convective heat transfer. To mitigate these issues, this study investigates a modified SAH with novel rotating spiral-shaped baffles using a 4E framework—energy, exergy, exergoeconomic, and enviroeconomic perspectives. Results demonstrate superior performance, with configurations at P/e = 8 and e/H = 0.8 achieving peak useful heat gains of 156.78 W. The modified SAH attains daily average thermal, exergy, and thermohydraulic efficiencies of 29.55 %, 14.59 %, and 7.24 %, respectively. Exergoeconomic analysis yields a maximum parameter of 0.36 kWh/$ over 30 years, while enviroeconomic assessments indicate a reduction in CO2 emissions from 17.14 to 5.71 kg/year, with carbon credit earnings between $102.86 and $308.57. Future research can further enhance performance through novel storage media, optimized baffle design, intelligent controls, and advanced heat exchangers.http://www.sciencedirect.com/science/article/pii/S2214157X25006057Solar air heater (SAH)Rotating spiral-shaped bafflesThermohydraulic efficiency4E analysis |
| spellingShingle | Yogeshkumar Khimsuriya D.K. Patel Vivek Patel Vinay Pandit Hashim Sahar Mohaisen Lav Kumar Kaushik Pranav Mehta Himesh Patel Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis Case Studies in Thermal Engineering Solar air heater (SAH) Rotating spiral-shaped baffles Thermohydraulic efficiency 4E analysis |
| title | Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis |
| title_full | Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis |
| title_fullStr | Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis |
| title_full_unstemmed | Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis |
| title_short | Performance assessment of rotating spiral-shaped baffles built-in solar air heater: 4E and sustainability analysis |
| title_sort | performance assessment of rotating spiral shaped baffles built in solar air heater 4e and sustainability analysis |
| topic | Solar air heater (SAH) Rotating spiral-shaped baffles Thermohydraulic efficiency 4E analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25006057 |
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