Research Papers

Mathematical Modeling and Parametric Study of a Continuous Solar Desalination System

[+] Author and Article Information
Elias Movassagh

e-mail: rahimi@eng.ui.ac.ir
Department of Chemical Engineering,
College of Engineering,
University of Isfahan,
P.O. Box 81746–73441,
Isfahan, Iran

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received October 31, 2011; final manuscript received April 11, 2013; published online May 31, 2013. Assoc. Editor: Werner Platzer.

J. Sol. Energy Eng 135(3), 031015 (May 31, 2013) (7 pages) Paper No: SOL-11-1242; doi: 10.1115/1.4024242 History: Received October 31, 2011; Revised April 11, 2013

A mathematical model is presented to analyze the performance of a counter-current solar desalination system. Besides, the heat transfer equations, the mass transfer is also considered to improve the model precision. A new approach is used for analyzing the radiative heat transfer in these systems. A low enough value for feed flow rate, a moderate value for glass temperature, taking the advantage of high flux at the appropriate time and appropriate insulation of the floor could effectively increase productivity. The system length is also a significant parameter. The model can be sufficiently extended for other continuous solar desalination systems.

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Fig. 1

Schematic diagram of the conventional solar desalter mechanism

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Fig. 2

Schematic diagram of a counter-current inclined solar desalter

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Fig. 3

Variation of air and liquid temperature versus desalter length

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Fig. 4

Profiles of humidity of bulk air and saturation humidity of air

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Fig. 5

Effect of volumetric flow rate of feed on the a productivity

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Fig. 6

Effect of volumetric flow rate of feed on the temperature of seawater

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Fig. 7

Effect of glass temperature on the productivity

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Fig. 8

Effect of length of system on the productivity

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Fig. 9

Effect of radiation flux on the productivity

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Fig. 10

Effect of heat loss on the productivity

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Fig. 11

Effect of fc on the productivity

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Fig. 12

Water distillate trajectory in a (a) flat glass and (b) glass with threads

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Fig. 13

Effect of absorption coefficient of seawater on the productivity




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