Análise de custos entre coletores solares quanto a aspectos construtivos

Abstract

This work aims to investigate the production of solar thermal collectors, seeking to assess aspects of adaptations, improvements and innovations in sensitivity thereof to the possible problems caused by low external temperatures. It was found that, according to regional needs, it is essential to use this type of panel with the correction of a defect relevant to the models in the theoretical framework, especially to make them less susceptible to cracks generated by freezing and crystallization of water . This phenomenon is recurrent in the state of Rio Grande do Sul, due to low temperatures, which cover a range criticizes, close to 0 ° C, winter features of southern Brazil. Based on this aspect, a literature review was made showing some alternatives and their costs. The review focused on the alternatives presented by the manufacturers that allow eliminate this defect, such as the use of tubes made of stainless steel alloy, collector with evacuated tubes, or even the use of an anti-freeze valve. The cost comparisons between the methods exposed some aspects that can guide users to the correct choice of a suitable collector, as the return time (simple payback) and the highest net present value of each reporting model.