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STEPPED AND EVACUATED TUBE COLLECTOR COUPLED SOLAR STILLS: A COMPREHENSIVE REVIEW
Suraj Yadav, Himanshu Manchanda, Mahesh Kumar, Rakesh Kumar

Published in: International Journal of Current Engineering And Scientific Research ( IJCESR)
Volume- 4, Issue-10, pp.62-71, Oct 2017
DPI :-> 16.10046.IJCESR.2017.V4I10.6271.2085



Abstract
The demand of fresh water has been increased in modern world due to increased population and industrialisation. As per environment concerns, researchers are focussing towards renewable energy based desalination methods. Solar distillation is a promising method for the water desalination. Much research has been already done on different designs of solar still such as single basin, multi-basin, stepped type basin, wick type basin, inclined type basin etc. In this paper, recent advancements of stepped type solar stills and solar still coupled with evacuated tube collector have been made. In the stepped solar still, absorber surface of still is constructed in the steps to increase the surface area of basin. Productivity of weir type design of stepped solar still was observed nearly 7.4 kg/m2day. Various techniques are developed to increase the productivity of stepped solar still such as sun tracking system, coupling it with solar air heater, using glass cover cooling, integrated flat plate collector, evacuated tube collector, use of internal reflectors and external condensers etc. Maximum increase in productivity of 380% was found over conventional solar still using internal mirrors on each step of stepped solar still with automatic sun tracking system. Solar still coupled with evacuated tube solar collectors provided highest daily yield (4.24 kg/m2/day) among all active solar stills. Double layer wick solar still coupled with evacuated tube collector gave 114% higher distillate yield than simple solar still.

Key-Words / Index Term
stepped solar still, evacuated tube collector, weir type design, active solar still

How to cite this article
Suraj Yadav, Himanshu Manchanda, Mahesh Kumar, Rakesh Kumar , “STEPPED AND EVACUATED TUBE COLLECTOR COUPLED SOLAR STILLS: A COMPREHENSIVE REVIEW”, International Journal of Current Engineering And Scientific Research ( IJCESR), 4, Issue-10, pp.62-71, Oct 2017. DPI:16.10046.IJCESR.V4.I10.2085