Analytical and Experimental Study of Recycling Baffled Double-Pass Solar Air Heaters with Attached Fins

Analytical and Experimental Study of Recycling Baffled Double-Pass Solar Air Heaters with Attached Fins

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The study of the heat transfer of solar air heaters with a new design using an absorbing plate with fins and baffles, which facilitate the recycling of flowing air, is reported.The mathematical formulation and analytical analysis for such a recyclic baffled double-pass solar air heater were developed theoretically.The performance of the device was studied experimentally as well.The theoretical predicted Short Sleeves and experimental results were compared with another design, i.

e., a downward-type single-pass solar air heater without recycle and double-pass operations reported in our previous work.Significant improvement in heat-transfer efficiency is achieved with the baffle and fin design due to the recycling heating Curling - Accessories - Miscellaneous and the extended heat transfer area.The effects of mass flow rate and recycle ratio on the heat-transfer efficiency enhancement as well as on the power consumption increment are also discussed.