ESTUDO DA VIABILIDADE ECONÔMICA DE UM SISTEMA DE AQUECIMENTO SOLAR DE ÁGUA EM UMA RESIDÊNCIA UNIFAMILIAR EM LAGOA SANTA (MG)
DOI:
https://doi.org/10.46421/entac.v18i.823Keywords:
Solar water heating, Economical analysis, Energy-savingAbstract
The advancement of technology has resulted in a greater dependence on fossil fuels to supply energy demand. On the other hand, alternatives for obtaining energy more sustainably are being studied. The objective of this study was to evaluate the use of solar water heating to replace the electric shower in a single-family residence, in Lagoa Santa (Brazil). A preliminary budget estimate was carried out considering the cost of components, materials, and services for its implementation. Besides, it was estimated the energy demand for shower use as well as the savings generated by the solar heater. Subsequently, the discounted payback and Internal Return Rate methods were applied for economic analysis. The results indicated the feasibility of using the solar heater with a return to investors from approximately 13 and a half years. It is concluded, therefore, that despite the return occurring in a little more than half of the system’s lifespan (25 years), the initial investment presented a significant weight. Thus, further studies to enhance this technology reach or to make it cheaper should be done. Government’s fiscal incentives could also contribute to spread its adoption, especially in social housing.
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