DESIGN, FABRICATION AND HEAT TRANSFER STUDY OF GREEN HOUSE DRYER
The objective of the present study was to design to fabricate and to test the green house dryer in open and natural mode. The system is capable of generating a continuous flow of hot air temperature up to 60°C. Experiments were conducted in the premises of SHIATS in Allahabad at latitude of 25°N. Measurement of solar intensity, relative humidity inside and outside the green house dryer, moisture removal rate, air velocity, temperature at different point were recorded. These data were used for determination of the coefficient of convective mass transfer and then for development of the empirical relation of convective mass transfer coefficient with drying time under the open sun and natural mode. It is observed that the convective mass transfer coefficient is lower for drying inside the green house than the open sun drying.
