Bancada didática para análise de eficiência de compressores e dispositivos de expansão em um sistema de refrigeração

Abstract

We performed this study to build a bench with the didactic purpose of helping students practical experience in conducting classes on the refrigeration and air conditioning. The shape allows for bench mounting, with simple selector switches, the combination of system components and can be performed up to four combinations: reciprocating compressor and capillary tube, expansion valve and reciprocating compressor, rotary compressor and capillary tube, expansion valve and rotary compressor. At the exit of each component were installed two measurement instruments: an analog pressure gauge and a digital thermometer. These measures provide students to perform practical understanding of how different combinations of these systems interfere and therefore measure the efficiency of the system. The bench was built on a tubular metal structure with casters for easy moving and the reuse of some components used. The final cost to build the bench was R$ 1.500.00. It will be in UTFPR - Campus Medianeira, in the laboratory J35 and serve as a teaching tool for the teacher in the areas of refrigeration and air conditioning.