MELHORIAS APLICADAS EM UM AQUECEDOR SOLAR DE BAIXO CUSTO (ASBC) COM BAIXO RENDIMENTO

Abstract

This work consists of making a study to identify the causes of the low low cost solar heater (ASBC) installed in 2008 in a residence in the city of Pouso Alegre, MG, the problem gets worse in winter, where its efficiency was almost nil based on July 12 and 13 were the main causes were identified and the changes that should be made during the two days were collected the temperatures of the interior of the thermal reservoir in three heights, bottom, middle and surface, the inlet temperature of the heated water was also measured. of the collectors in the reservoir and the ambient temperature, the measurements occurred in a one hour period, beginning at 6:00 and ending at 18:00, during breaks between measurements were also observed various aspects of system operation after After identifying the causes of the problems, on August 20, 21, 22 and 23, improvements, and after the modification was completed were made on August 27 and 28 new measurements to assess the results of improvements under the same conditions as those measurements previously made, graphs and tables were used to facilitate the interpretation, a survey was made of the electricity consumption in 2010, the consumption of energy after the modifications were analyzed and compared with the others before the improvements were found that the system was heating only one third of the water in the reservoir, the top, and by 18:00 the reservoir temperature had already dropped to 20 ° C, this demonstrates the inefficiency of the system and thermal insulation after modifications almost all the water in the reservoir is heated to a temperature 48 ° C at 15:00, the next day at 6:00, the average temperature in the 27.5 ° C, which proves the efficiency of the new thermal insulation, the reflections in the energy bill are immediate, in the month and 2011, observing mainly the months of winter where values ​​rise considerably from October there has already been a reduction of consumption.