thermal model; solar distillation; regression analysis; rigorous; climatic
In this article a thermal model has been developed to determine the convective mass transfer for different Grashof Number range in solar distillation process. The model is based on simple regression analysis. Based on the experimental data obtained from the rigorous outdoor experimentation on passive and active distillation systems for summer climatic conditions, the values of C and n have been calculated. The modified values of C and n for Nu= C(GrPr)", are proposed as C=0.0322; n=0.4114 for 1.794x106<Gr<5.724x106 in a passive solar still and C=0.0538; n=0.383 for 5.498 x 106< Gr < 9.128 x 106 in an active solar still. The percentage deviation between experimental and
theoretical results are found within an accuracy of 12%.