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Prediction, Evaluation and Prevention of Scaling in Flat Plate Solar Water Heaters

Arunachala, U C and Bhatt, Siddhartha M and Sreepathi, L K (2009) Prediction, Evaluation and Prevention of Scaling in Flat Plate Solar Water Heaters. Emerging Journal on Engineering Science Technology. EJEST, 4 (7). pp. 37-53. ISSN 0974-2050

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Abstract

Scale formation in risers of flat plate solar water systems is a problem in places where hard water is being used. In this paper, the total blockage time for the risers with respect to the water quality is brought out in the form of an equation and also the effects of scaling on energy efficiency indices like instantaneous efficiency, mass flow rate and overall heat loss coefficient are quantified by the Hottel Whillier Bliss (H-W-B) equation in case of thermosiphon circulation systems. The effects of scaling on mass flow and heat transfer rates for both systems are quantified. It is seen that mass flow rate altered by scaling affects energy efficiency much more than that altered by heat transfer rate. The analysis is experimentally validated. The various scale prevention and descaling techniques are also reviewed.

Item Type: Article
Uncontrolled Keywords: Hardness, H-W-B equation, scaling, thermosiphon system.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 19 Oct 2011 09:51
Last Modified: 19 Oct 2011 09:51
URI: http://eprints.manipal.edu/id/eprint/1433

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