Avaliação da eficiência de um coletor solar plano usando policarbonato em substituição ao vidro.

Abstract

The substitute materials made of glass and metal polymeric materials is growing significantly and the polycarbonate is an amorphous thermoplastic, high transparency, lighter than glass and has a highly diversified use in its supply chain. This work consists of an experimental study to compare the efficiency of heating system solar water using a flat solar collector, operating under forced circulation. For analysis of such a comparison will be tested two configurations: first the flat solar collector with coverage polycarbonate crystal with 4 mm thick is used for the second experimental set up is the same collector used now covering also crystal glass 4 mm thick. The performance evaluation will be done by comparing the thermal efficiency for the conditions previously proposed (polycarbonate and glass). To determine the efficiency of each system, daily measurements of insolation W/m2 (available heat from the sun), mass flow measurements of the system at each time interval (10 minutes) and heat calculation in each time interval by the heating plate by the initial and final temperature difference of there. With this evolution is expected to set the best fitting (polycarbonate or glass) to be used for future solar flat plate collectors projects.