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Abstract

With the growing demand for alternative energy, there is an increasing demand for the development and marketing of flat plate solar collectors used for water heating for domestic sanitary usage or industrial purposes. For the Brazilian market these products must attend and pass all of the quality and efficiency tests required by the Brazilian Labeling Program. After evaluating the level required for the equipment approval and contacting the laboratories responsible for testing products under the Brazilian Labeling Program, it was found that a large number of collectors are not approved, thus not suitable for the market. This work aims to evaluate this methodology to attest the efficiency of the equipment with emphasis on the effects of water infiltration in collector efficiency by employing an inductive analysis of the mathematical modeling using the TRNSYS software to simulate the effect of infiltration/condensation of water inside the collector. Based on the monograph by Moreira. (2012) which consists in the experimental analysis of water infiltration into the solar collector to the amount of 20.8 g, 41.6 g and 62.4 g and its relation to the efficiency of the equipment, produced A mathematical model using TRNSYS Simulation Studio software in order to compare the results obtained experimentally and numerically. The results show that the effect of temperature on infiltration of water from the hot water outlet manifold for the various concentrations previously mentioned, it is not significant enough to characterize a reduction in equipment efficiency