Análise dos parâmetros de projeto no funcionamento de aquecedores solares com coletor/armazenador integrados

Proceedings of COBEM 2011 Copyright © 2011 by ABCM

21st Brazilian Congress of Mechanical Engineering October 24-28, 2011, Natal, RN, Brazil

CFD ANALYSIS FOR INTEGRATED COLLECTOR STORAGE SOLAR WATER HEATERS (ICSSWH) BASED ON CUBOID TYPE GEOMETRIES
Flavio Breglia Sales, [e-mail] Vicente Luiz Scalon, [e-mail] Alcides Padilha, [e-mail]
Depto de Eng. Mecânica, Faculdade de Engenharia/Bauru, Universidade Estadual Júlio de Mesquita Filho - UNESP

Abstract. On the last times, renewable energy sources have increasing its participation on the energetic production matrix on all over the world . Solar energy was growing in energy generation using different technologies, highlighting the photovoltaics cells and collection by solar thermal energy. Solar domestic hot water systems (SDHWS) represents an efficient way to decrease the non-renewable energy consumption avoiding the use of fossil fuels and electric energy. The major reported problem of these systems is the high initial cost, despite their lower maintenance cost. To reduce this initial cost, a alternative proposed is integrating solar collector and storage solar water heaters on ICSSWH devices. So, this paper purposes to analyze the general behavior and fluid flux of the ICSSWH during collection and cooling processes to improve and to evolve optimum configuration for high performance. This study was focused on the cuboid ICSSWH models with some structural and parametrical changes. Based on these geometries some project parameters and its influence on the system will be determined. The validation of the model has been done with some results previously presented on the literature. After this, some geometric parameters were modified and new analyses are shown and discussed. Keywords: Solar Energy; integrated collector storage solar water heaters (ICSSWH); Numerical Simulation

1. INTRODUCTION The concern for maintaining quality of life on the planet in recent years,