ESTIMATION OF CONVECTIVE MASS-TRANSFER IN SOLAR DISTILLATION SYSTEMS

In this article a thermal model has been developed to determine the co nvective mass transfer for different Grashof Number range in solar dis tillation process. The model is based on simple regression analysis. B ased on the experimental data obtained from the rigorous outdoor exper imentation on passive and active distillation systems for summer clima tic conditions, the values of C and n have been calculated. The modifi ed values of C and n for Nu=C(GrPr)(n), are proposed as C=0.0322; n=0. 4114 for 1.794 x 10(6) <Gr <5.724 x 10(6) in a passive solar still and C=0.0538; n=0.383 for 5.498 x 10(6) <Gr <9.128 x 10(6) in an active s olar still. The percentage deviation between experimental and theoreti cal results are found within an accuracy of 12%. Copyright (C) 1997 El sevier Science Ltd.