THERMAL SCIENCE

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Sampathkumar Karuppusamy

AN EXPERIMENTAL STUDY ON SINGLE BASIN SOLAR STILL AUGMENTED WITH EVACUATED TUBES

ABSTRACT
The productivity of the solar still is determined by the temperature of water in the basin and the glass temperature. Various active methods have been adopted to increase the temperature of the basin, so as to improve the productivity of solar still. Most of the previous research works have been focusing on flat plate collector and concentrating collector. In this experimental study, a single slope solar still directly augmented with evacuated tubes was used to increase the daily productivity by reducing heat losses. Evacuated tubes were directly coupled to the lower side of the single slope solar still with an area of 1m2. Black gravel is used to increase the productivity by means of reducing quantity of water in the basin. Extensive experiments were conducted to explore the performance of solar still in several modes namely still alone, still with black stones, still with evacuated tubes, and still with evacuated tubes and black gravel. The experimental setup was designed and installed at Solar Energy Park, Tamilnadu College of Engineering, Coimbatore (77˚E, 11˚N), Tamilnadu, India. These experiments were conducted using tap water as feed. It was found that, after augmentation of the evacuated tubes, the daily production rate has increased by 49.7 % and it increased by 59.48% with black stones. Economic analysis was also done and payback period of this experimental setup is 235 days.
KEYWORDS
augmentation, black gravel, evacuated tube, solar still
PAPER SUBMITTED: 2009-08-06
PAPER REVISED: 2009-09-08
PAPER ACCEPTED: 2009-10-25
DOI REFERENCE: https://doi.org/10.2298/TSCI090806079S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Issue 2, PAGES [573 - 581]
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An experimental study on single basin solar still augmented with evacuated tubes

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