Performance of a Forced Convection Solar Drier Integrated with Gravel as Heat Storage Material

M. Mohanraj (India) and P. Chandrasekar (Malaysia)


Solar drier, heat storage materials and drying


An indirect forced convection solar drier integrated with sensible heat maternal (gravel) was developed and tested its performance for drying of pineapple slices under the metrological conditions of Pollachi (latitude of 10.39 o N, longitude of 77.03 o E), India. The results showed that the moisture content (wet basis) of pineapple was reduced from about 87.5% to 14.5% (equilibrium moisture content) in about 29 h in bottom tray and 32 h in top tray. Performance parameters such as drying characteristics, drying rate, specific moisture extraction rate and solar air heater thermal efficiency are discussed in this paper.

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