Análise térmica de um sistema de refrigeração solar utilizando um Chiller de absorção com NH3/LiNO3 como fluído de trabalho

Abstract

In the air conditioning and thermal comfort sector, the study and implementation of systems that use clean and renewable energy and that work reliably are becoming very important. In this work, a case study was carried out where a plate system located in the city of Recife will generate electricity and hot water in order to supply electricity

to a commercial point and use the hot water to feed the absorption chiller that will air- conditioning the commercial environment. It has been proposed to use NH3/LiNO3 As

The Chiller's Working Fluid. This fluid was chosen because it eliminated the need for a rectifier in the chiller and because its working temperature is lower than the temperature of other fluids normally used. The model applied in this work was developed using the software, calculating the generation of electricity and heat by the PV/T system together with the amount of cold heat produced by the chiller and verifying whether it is capable of maintaining thermal comfort in the environment whose thermal load was determined using the 16401 standard and the floor plan of the enterprise. The simulation was performed using the average solar radiation in each month of the year. The results obtained demonstrate that the chiller was sized enough to maintain thermal comfort during the heat peaks in each month during the year and also the need to have a thermo-accumulation tank due to the seasonality of solar radiation.