Evaluation of convective heat transfer coefficient in crop drying under open sun drying conditions

In this payer, an attempt has been made to evaluate the convective beat tra nsfer coefficient operating in crop drying in open sun drying conditions (n atural convection). Values of the constants, C and n were obtained by linea r regression analysis from experimental data obtained for six crops, namely green chillies, green peas, Kabuli chana, onion, potato and cauliflower. A nalysis was also performed for Kabuli chana under natural cooling condition s. Based on the values of C and n convective heat transfer coefficients for these crops were determined. The experimental error in terms of percent un certainty was also calculated. (C) 2000 Elsevier Science Ltd. All rights re served.