Equations describing heat and mass exchanges in a closed cavity with hot saline water streaming on its base and partitioned by an externally cooled flat heat exchanger are numerically solved. The results obtained show that an increase of inlet saline water temperature or mass flow rate increases the heat and mass transfer between evaporation and condensation surfaces. Furthermore, external cooling of the condensation surface contributes significantly to the increase of these exchanges. Our theoretical analysis is in reasonably good agreement with experimental results published in the literature for the practical heat exchange fluxes encountered in solar stills.

Issue Section:
Research Papers
Topics:
Heat, Mass transfer, Water, Condensation, Cavities, Cooling, Evaporation, Flow (Dynamics), Flux (Metallurgy), Heat exchangers, Solar stills, Theoretical analysis, Water temperature
1.
Baum
V. A.
, and
Bairamov
R.
,
1964
, “
Heat and Mass Transfer Processes in Solar Still of Hotbox Type
,”
Solar Energy
, Vol.
8
, No.
3
, p.
78
78
.
2.
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3.
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4.
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5.
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7.
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8.
Dunkle, R. V., 1961, “Solar Water Distillation: The Roof Type Still and a Multiple Effect Diffusion Still,” International Developments in Heat Transfer, ASME, Part V, Section A, p. 895.
9.
Frederick
R. L.
,
1989
, “
Natural Convection in an Inclined Square Enclosure With a Partition Attached to its Cold Wall
,”
Int. J. Heat Mass Transfer
, Vol.
32
, No.
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, pp.
87
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10.
Hiroyuki
S.
,
Churchill
W.
, and
Sayama
Hayatoshi
,
1975
, “
Natural Convection in a Rectangular Channel at Various Aspect Ratios and Angles, Experimental Measurements
,”
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11.
Lin
N. N.
, and
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A.
,
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,”
Int. J. Heat Mass Transfer
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12.
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13.
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14.
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15.
Phillips
W. F.
,
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The Effects of Axial Conduction on Collector Heat Removal Factor
,”
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, Vol.
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187
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16.
Rheinlaender
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,
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Numerical Calculation of Heat and Mass Transfer in Solar Stills
,”
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17.
Rifert
V. G.
,
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Heat Transfer and Flow Modes of Phases in Laminar Film Vapour Condensation Inside a Horizontal Tube
,”
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18.
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19.
Siegel, R., and Howell, J. R., 1981, Thermal Radiation Heat Transfer, 2nd ed., McGraw-Hill, New York.
20.
Soliman, S. H., 1982, “Heat and Mass Transfer Inside a Still,” Rev. Int. D’heliotechnique ler semeste, pp. 42–44.
21.
Sparrow
E. M.
, and
Prakash
C
,
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, “
Interaction Between Internal Natural Convection in an Enclosure and External Natural Convection Boundary-Layer Flow
,”
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, Vol.
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895
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22.
Tchinda, R., 1994, “Contribution a` l’e´tude des transferts thermiques et massiques par convection naturelle dans une cavite´ ferme´e partitionne´e par une cloison active,” The`se Doctorat 3e`me Cycle, Universite´ de Yaounde´ I.
23.
Umarov
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, and
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