masterThesis
Performance comparativa entre R437A e R134A paradrop-in em um condicionador de ar automotivo
Fecha
2015-06-19Registro en:
NASCIMENTO, Bruno Daniel Alves do. Performance comparativa entre R437A e R134A paradrop-in em um condicionador de ar automotivo. 2015. 67f. Dissertação (Mestrado em Engenharia Mecânica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2015.
Autor
Nascimento, Bruno Daniel Alves do
Resumen
The reduction in energy consumption is the main requirement to be satisfied in
refrigeration and air conditioning by mechanical vapor compression system. In
automotive system isn´t different. Thermal analyses in these systems are crucial for a
better performance in automotive air conditioner. This work aims to evaluate the
conditions of use of R134A refrigerant (used in vehicles) and compare with R437A
(alternative refrigerant), varying the speed of the electric fan in the evaporator. All tests
were performed in automotive air conditioning unit ATR600, simulating the thermal
conditions of the system. The equipment is instrumented for data acquisition
temperature, condensation and evaporation pressures and electrical power consumed to
determine the coefficient of performance of the cycle. The system was tested under
rotations of 800, 1600 and 2400 rpm with constant load of R- 134a. It occurred with the
same conditions with R437A. Both recommended by the manufacturer. The results
show that the best system performance occurs in the rotation of 800 RPM for both
refrigerants.