Performance Study of Solar Air Heater Having Absorber Plate with Half-Perforated Baffles | Zendy

B. K. Maheshwari | Zendy; Rajendra Karwa | Zendy; Sibendra Kumar Gharai | Zendy

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Performance Study of Solar Air Heater Having Absorber Plate with Half-Perforated Baffles

Author(s) -

B. K. Maheshwari,

Rajendra Karwa,

Sibendra Kumar Gharai

Publication year - 2011

Publication title -

isrn renewable energy

Language(s) - English

Resource type - Journals

eISSN - 2090-746X

pISSN - 2090-7451

DOI - 10.5402/2011/634025

Subject(s) - duct (anatomy) , baffle , materials science , thermal , airflow , mechanics , optics , heat transfer , composite material , mechanical engineering , meteorology , engineering , physics , medicine , pathology

The paper presents a detailed mathematical model for performance prediction of a smooth duct solar air heater validated against the experimental results. Experimental study on a solar air heater having absorber plate with half-perforated baffles on the air flow side shows thermal efficiency enhancement of 28%–45% over that of the smooth duct solar air heater, which is attributed to the heat transfer enhancement (of the order of 180%–235%) due to the perforated baffles attached to the absorber plate and reduction in the mean temperature of the absorber plate by 20°C–25°C as compared to the temperature of absorber plate of smooth duct air heater. Using the mathematical model, the performance plot for the baffled duct air heater has been presented, and the effect of the variation of ambient parameters on the predicted thermal efficiency has been studied.

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