• Avinash Ravindra Tamkhane
• Prof. Tushar A. Koli
• Dr. Vijaykumar Patil
• Prof. Kishor Mahajan
• Prof. Mayur Thakur

Solar air heaters (SAHs) have emerged as a cost-effective and efficient solution for renewable heating, with multi-pass, low-cost designs showing particular promise. This review synthesizes recent advancements and performance evaluations of multi-pass low-cost SAH systems, organized into four main categories: general literature on solar air heaters, performance analysis of single-pass systems, experimental enhancements in heat transfer, and analysis techniques for heat transfer. The review highlights various strategies to improve SAH efficiency. It covers advancements in solar air heater design, such as the use of artificial roughness, jet impingement, piezo-electric fans, and phase change materials. It also examines mathematical modeling for optimizing performance and the development of novel absorber materials, including the use of recyclable aluminum cans. Performance analysis indicates that multi-pass configurations generally outperform single-pass systems in terms of heat transfer and overall efficiency. Experimental studies reveal that integrating materials like graphite powder and innovative designs, such as V-up continuous ribs, can significantly enhance thermal performance. Additionally, the review discusses the application of computational fluid dynamics and other analytical techniques to further optimize heat transfer. Overall, the review provides a comprehensive overview of the current state of multi-pass low-cost SAHs, offering insights into ongoing improvements and future research directions aimed at enhancing their performance and cost-effectiveness.

Multi-Pass Design, Low-Cost SAH, Single-Pass Systems, Heat Transfer Enhancement, Recyclable Aluminum Cans, Cost-Effectiveness

"A review on performance of single pass and multi pass solar air heaters", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 9, page no.d206-d218, September-2024, Available :http://www.jetir.org/papers/JETIR2409325.pdf

"A review on performance of single pass and multi pass solar air heaters", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 9, page no. ppd206-d218, September-2024, Available at : http://www.jetir.org/papers/JETIR2409325.pdf