Abstract
The advancement of renewable solar energy is prospective for energy, heat exchanger, and air heater applications. The main objective of the present research is enhancing the solar air heater thermal performance by the modification of a collector absorber-like plain absorber featuring rectangular fine (SAH 2) and sodium carbonate decahydrate (Na2CO3·10H2O) and Magnesium sulfate heptahydrate (MgSO4·7H2O) PCM with rectangular fin (SAH 3). During the experimental evaluation, the airflow varied by 0.042 and 0.059 kg/s. Influences of collector modification on the functional behaviour of solar air heaters (SAH) are evaluated. Its results are compared to the system of conventional setup without modification of the solar collector with a plain absorber (SAH-1). With the excellence of Na2CO3·10H2O/MgSO4·7H2O with fin setup performed with 0.059 kg/s found better heat transfer performance including heat gain, thermal & exergy efficiency, heat loss coefficient, and PCM temperatures like 927.3 W, 78.6 %, 33.6 %, 16.9 W/m2K, and 68.3 ⁰C respectively. Moreover, Increasing the airflow rate leads to improved heat transfer, and the SAH proves to be effective at higher flow rates when equipped with fins and PCM.
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