Estudo de viabilidade sobre o reaproveitamento energético do calor gerado por fornos a lenha de uso comercial utilizando módulos de Peltier

Abstract

Power companies were forced to use thermoelectric generation due to the recent energy crisis in our country, which was caused by insufficient rainfall in certain areas, resulting in higher generation costs, which were consequently passed on to consumers. Such transfer has a significant financial impact for most consumers, especially small and medium-sized enterprises. In view of this, alternative solutions for energy generation become more attractive and necessary. In this work, we seek to evaluate the feasibility of reusing thermal energy that would originally be dispersed in the environment, converting it into electrical energy, for a low-power commercial consumer, analyzing the consumption profile of the establishment in question, through consumption data and the possible savings generated by the change. The group’s cost of producing kWh was calculated taking into account both the implementation costs of the enterprise and the variables that affect them. From the development process of the previously listed phases, it was determined that the project would be financially unfeasible at the chosen point with the temperature delta at 85ºC, since the investment cost would be approximately R$ 308,250.00 and the payback of 23.5 years making the return on investment very time consuming, but we indicate possible alternative approaches that could be suggested to make it viable, improving its efficiency and reducing the initial investment, being able to bring the payback to approximately 4 years in a very efficient situation. We also brought the possibility of a sustainable charging station that can be a differentiator for the brand with an initial cost of approximately R$18,000.00.