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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 21 | Page No.: 3187-3197
DOI: 10.3923/jas.2007.3187.3197
 
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Experimental Study on the Comparative Thermal Performance of a Solar Collector Using Coconut Coir over the Glass-Wool Thermal Insulation for Water Heating System

H.Y. Andoh, P. Gbaha, P.M.E. Koffi, S. Toure and G. Ado

Abstract:
This study presents the comparative results of experimental investigations of the thermal performance of two solar water heaters. These technological devices operate under thermosiphon conditions. The first uses the coconut coir, a local vegetable fiber, cheap and available and the second, the glass wool, an imported and expensive material, as thermal insulations. Two complete collectors test facilities, operating in the same conditions, equipped with a data acquisition system, have been assembled and tested for comparing their thermal performances. These tests are performed under various minimum and maximum daily solar intensities, ranging from 220 to 1000 W m&olne;2, from cloudy to sunny days, with the daily outside temperature ranging between 25 to 40°C. The comparative results show an average efficiency of 64% for the two systems when the water mass flow rate reaches 0.010 kg sec&olne;1. The increase in temperature through the absorber of the first collector is higher than 40°C, when it is 50°C for the second one. The outlet hot water temperature of the first one reaches 80°C and more, when it is 90°C for the second one. The results show that the first system is quite suitable for application elsewhere and particularly in Africa, at an acquisition cost of 25% cheaper than the traditional one, where there is a plentiful supply of coconut coir.
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How to cite this article:

H.Y. Andoh, P. Gbaha, P.M.E. Koffi, S. Toure and G. Ado, 2007. Experimental Study on the Comparative Thermal Performance of a Solar Collector Using Coconut Coir over the Glass-Wool Thermal Insulation for Water Heating System. Journal of Applied Sciences, 7: 3187-3197.

DOI: 10.3923/jas.2007.3187.3197

URL: https://scialert.net/abstract/?doi=jas.2007.3187.3197

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