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Comparative analytical study of thermal and thermo-hydraulic performance in solar air heaters with fins, baffles, porous matrix, and internal recycling | ||
Journal of Computational & Applied Research in Mechanical Engineering (JCARME) | ||
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 14 مرداد 1404 اصل مقاله (1.11 M) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22061/jcarme.2025.11673.2554 | ||
نویسندگان | ||
Fatemeh karami؛ Majid Sabzpooshani* | ||
Faculty of Mechanical Engineering, University of Kashan, Kashan 8731751167, Iran | ||
تاریخ دریافت: 03 بهمن 1403، تاریخ بازنگری: 10 مرداد 1404، تاریخ پذیرش: 14 مرداد 1404 | ||
چکیده | ||
This paper presents a comparative analytical investigation of five distinct configurations of single-pass flat plate solar air heaters (SAHs), incorporating fins, baffles, porous matrix, and internal air recycling. A steady-state, one-dimensional mathematical model was developed and solved analytically to evaluate both thermal and thermo-hydraulic performance under various mass flow rates and reflux ratios. The results indicate that using a porous matrix alone results in approximately 14% lower thermal efficiency compared to configurations with fins and baffles. Placing the matrix beneath the absorber plate improved thermal efficiency by about 1.5%, but reduced thermo-hydraulic efficiency by roughly 2.5% compared to placing it above. While combining enhancement techniques does not always yield superior performance, the SAH equipped with fins and baffles alone achieved the highest thermal and thermo-hydraulic efficiencies across most conditions. Furthermore, increasing solar radiation intensity and air mass flow rate enhanced useful heat gain, although higher pressure losses caused the thermo-hydraulic efficiency to decline at elevated flow rates. Overall, this study provides valuable insights into the optimal integration of thermal enhancement methods in solar air heaters for improved energy performance. | ||
کلیدواژهها | ||
Solar air heater؛ Porous Matrix؛ Fin and baffles؛ Upstream and downstream recycles؛ Thermo-hydraulic efficiency | ||
مراجع | ||
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آمار تعداد مشاهده مقاله: 4 تعداد دریافت فایل اصل مقاله: 1 |