Thermal performance of an active single basin solar still (ASBS) coupled to shallow solar pond (SSP)

In order to enhance the productivity of single basin solar stills especially during the night, a shallow solar pond (SSP) was coupled to the still. An analytical model for the various elements of the system (the pond and the still) was performed. Numerical calculations were carried out under Tanta p...

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Bibliographic Details
Published in:Desalination 2011-10, Vol.280 (1), p.183-190
Main Authors: El-Sebaii, A.A., Aboul-Enein, S., Ramadan, M.R.I., Khallaf, A.M.
Format: Article
Language:English
Subjects:
Active single basin still
Applied sciences
Basins
Computational efficiency
Computer simulation
desalination
Exact sciences and technology
mass flow
Mass flow rate
Mathematical analysis
Mathematical models
Pollution
Ponds
Productivity
Shallow solar pond
weather
Weather conditions
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Summary:In order to enhance the productivity of single basin solar stills especially during the night, a shallow solar pond (SSP) was coupled to the still. An analytical model for the various elements of the system (the pond and the still) was performed. Numerical calculations were carried out under Tanta prevailing weather conditions. The daily productivities of the active single basin solar still (ASBS) were found to be 5.740 and 1.830 (kg/m 2 day) with and without the SSP, respectively. The daily productivity P d and efficiency η d of the active still were found to decrease with increasing the thickness d w and mass flow rate m ˙ of the water flowing over the basin liner of the still up to typical values of 0.030 m and 0.015 kg/s. Moreover, the monthly average of the daily productivity P ¯ d had minimum values of 3.0 and 1.570 (kg/m 2 day) in December with and without the SSP, respectively. The maximum values of P ¯ d were found to be 6.68 and 5.29 (kg/m 2 day) in July with and without the SSP, respectively. To validate the proposed mathematical models, comparisons between experimental and theoretical results had been performed. Good agreement had been achieved. ► Daily productivities of ASBS are 5.74 and 1.83 kg/m 2day with and without SSP. ► Average efficiencies are 47.54 and 20.45% for ASBS with and without SSP. ► Maximum daily productivities are 6.68 and 5.29 kg/m 2day in July with and without SSP. ► In addition to use the ASBS as a distiller the ASBS can be used as a heat source.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2011.07.004