Due to many potential problems associated with an open regeneration system in application to reconcentration with liquid desiccants, a closed-type solar regenerator has been simulated and analyzed in this paper. It consists of a flat, blackened, tilted surface with a transparent glazing as a covering. The weak desiccant to be concentrated flows as a thin film over the absorber and the water evaporating from the desiccant due to absorption of solar energy is condensed on the underside of the glass cover. A theoretical model, which includes the variation of rate of evaporation of water along the flow length of the regenerator, has been used to examine the thermal performance of the regenerator. Changes in thermal performance are reported in terms of insolation and the mass of water evaporated from the desiccant for different operating parameters.

Issue Section:
Research Papers
Topics:
Simulation, Solar energy, Water, Evaporation, Flow (Dynamics), Absorption, Glass, Thin films, Transparency
1.
Collier
R. K.
,
1979
, “
The Analysis and Simulation of an Open Cycle Absorption Refrigeration System
,”
Solar Energy
, Vol.
23
, No.
4
, p.
357
357
.
2.
Duffie, J. A., and Beckman, W. A., 1991, Solar Engineering of Thermal Processes, 2nd Edition, John Wiley, New York, NY.
3.
Dunkle, R. V., 1961, “Solar Water Distillation: The Roof Type Still and a Multiple Effect Diffusion Still,” International Developments in Heat Transfer, ASME, New York, p. 895.
4.
Gandhidasan
P.
,
1983
a, “
A Simple Analysis of an Open Regeneration System
,”
Solar Energy
, Vol.
31
, No.
3
, p.
343
343
.
5.
Gandhidasan
P.
,
1983
b, “
Theoretical Study of Tilted Solar Still as a Regenerator for Liquid Desiccants
,”
Energy Conversion and Management
, Vol.
23
, No.
2
, p.
97
97
.
6.
Hawlader
M. N. A.
, et al.,
1992
, “
Performance Evaluation of Glazed and Unglazed Collectors/Regenerators in a Liquid Absorbent Open-Cycle Absorption Cooling System
,”
International Journal of Solar Energy
, Vol.
11
, p.
135
135
.
7.
Hollands
K. G. T.
,
1963
, “
The Regeneration of Lithium Chloride Brine in a Solar Still for Use in Air Conditioning
,”
Solar Energy
, Vol.
7
, p.
39
39
.
8.
Kakabaev
A.
, et al.,
1969
, “
Absorption Solar Regeneration Unit With Open Regeneration of Solution
,”
Applied Solar Energy
, Vol.
5
, No.
4
, p.
69
69
.
9.
Kumar
P.
, et al.,
1985
, “
Experimental Heat and Mass Transfer Studies on the Solar Generator of an Open Cycle Absorption Cooler
,”
Chemical Engineering Research and Design
, Vol.
63
, p.
139
139
.
10.
Kaudinya
J. V.
, and
Kaushik
S. C.
,
1986
, “
Experimental Validation of Theoretical Studies on Open and Forced Flow Solar Regenerator
,”
International Journal of Solar Energy
, Vol.
4
, p.
13
13
.
11.
Peng, C. S. P., and Howell, J. R., 1981, “The Performance of Various Types of Regenerators for Liquid Desiccants,” ASME Paper No. 81-WA/Sol-31.
12.
Peng
C. S. P.
, and
Howell
J. R.
,
1982
, “
Analysis of Open Inclined Surface Solar Regenerators for Absorption Cooling Applications—Comparison Between Numerical and Analytical Models
,”
Solar Energy
, Vol.
28
, No.
3
, p.
265
265
.
13.
Sodha
M. S.
, et al.,
1981
, “
Simple Multiple Wick Solar Still: Analysis and Performance
,”
Solar Energy
, Vol.
26
, p.
127
127
.
14.
Wood, B. D., et al., 1983, “Performance Characteristics of an Open-Flow Liquid Desiccant Solar Collector/Regenerator in a Hot Arid Climate,” Proceedings of the Solar World Congress, Perth, Australia, Vol. 1, p. 337.
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