A single-basin solar still may be used for primary concentration of dilute ethanol produced from fermentation. In order to describe the simultaneous heat and mass transfer in the still, different models have been proposed and tested against some experimental measurements on a still having a 1 m × 1 m basin area. Measurements were based on steady-state operation using electrical heating and unsteady-state operation using solar energy. The proposed models were found to have similar trends even though their derivations were based on different approaches. The models were found to overpredict the mass fluxes of ethanol (Me) and water (Mw) at high basin temperature and ethanol concentration, with different degrees.

1.
Bird, R. B., Stewart, W. E., and Lightfoot, E. N., 1960, Transport Phenomena, John Wiley and Sons, New York.
2.
Dunkle
R. V.
,
1961
, “
Solar water distillation: the roof type still and multiple effect diffusion still
,”
International Developments in Heat Transfer, A.S.M.E.
, Part
V
,
895
902
.
3.
Elsayed
M. M.
,
1983
, “
Comparison of Transient Performance Predictions of a Solar-Operated Diffusion-Type Still With a Roof-Type Still
,”
ASME JOURNAL OF SOLAR ENERGY ENGINEERING
, Vol.
105
, pp.
23
28
.
4.
Incropera, F. P., and Dewitt, D. P., 1990, Fundamentals of Heat and Mass Transfer, 3rd ed., Wiley and Sons, New York.
5.
Jacob, M., 1957, Heat Transfer, Vol. 2, John Wiley and Sons, New York.
6.
Malik, M. A. S., Tiwari, G. N., Kumar, A., and Sodha, M. S., 1982, Solar Distillation, Pergamon Press, New York.
7.
Shawaqfeh, A. T., and Farid, M. M., 1994a, “New developments in the theory of heat and mass transfer in solar stills,” Solar Energy, in press.
8.
Shawaqfeh, A. T., and Farid, M. M., 1994b, “Distillation of Ethanol-Water mixture using solar still,” ASME JOURNAL OF SOLAR ENERGY ENGINEERING, in press.
9.
Sherwood, T. K., Pigford, R. L., and Wilke, C. R., 1975, Mass Transfer, McGraw-Hill, New York.
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