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Energetic Analysis of a Low Cost Solar Heater

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008835.(doi:10.13031/2013.29648)
Authors:   Renato Adriane Alves Ruas, Edney Alves Magalhães, Adílio Flauzino de Lacerda Filho, Juarez Souza Silva, Daniel Rizzo Carvalho
Keywords:   alternative energies, solar radiation, solar collector

The objective of this study was to analyze the utilization of recyclable and low cost materials for solar water heating. A tubular solar water heater prototype whose dimensions were 0.05 x 0.03 x 6 m with a wall thickness of 3 mm was constructed and evaluated. The prototype was painted flat black and surrounded by transparent PET bottles. Evaluation of the collector considered of reading water temperature between 10:00 AM and 4:00 PM with 6 daily measurements on July 2, 3 and 4 of 2004. During evaluating the water flow rate remained constant at 20 L h-1. The results showed that the developed collector presented an energetic absorption of 2.33 kWh day-1 which represents 7.77 kWh day-1m-2 of collector. It was concluded that the developed collector possesses a strong social character, as well as being a rational alternative for Brazilian energetic problems, contributing to the reduction of electricity transmission and distribution.

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