Abstract
In this study, thermal performance of double- and triple-pass solar air heater with longitudinal fins is mathematically evaluated. The effects of parameters, viz. mass flow rate, solar intensity and inlet temperature upon outlet temperature, thermal efficiency and increments in efficiency, power consumption are presented. The analytical solution for the mathematical model involving energy balance equations of different components of solar air heater is obtained using a MATLAB 8.1. Triple-pass solar air heater with fins exhibits better thermal performance, whereas double-pass solar air heater with fins is economically viable within the opted conditions. The results of the analytical models are in good agreement with experimental findings of earlier researchers.
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