Instrumentación de un Refrigerador Doméstico para El Análisis del Comportamiento de las Variables de Presión y Temperatura de Operación

Abstract: Due to the high consumption of electric energy that represent the use of a domestic refrigerator in homes, due mainly to one of its main parts such as the compressor, it was established the need to analyze the thermodynamic behavior in order to know its operating conditions, so in this article presents mainly the results of the temperature behavior of the freezing compartment and the pressure at the compressor outlet of a domestic refrigeration system, obtained on the basis of the minutal measurement of said variables during a period of operation of 6 hours. This has been achieved through the instrumentation of a 234 liter total volume refrigerator / freezer that works with R134a refrigerant. In addition, the influence of the on / off condition of the compressor on the measured temperature and pressure variables has been analyzed. It has been verified that once the compressor is switched on, the freezer temperature drops to -20.7 ° C in 90 minutes, at which temperature the compressor switches off. The average time for restarting the compressor is 7 min. As for the pressure values at the output of the compressor, a variation between 0.9 and 14.67 bar is observed, which are influenced by the on / off state of the compressor. Concluding that the energy consumption of the refrigerator is a direct function of the operating temperature ranges, thermal load and the frequency of opening and closing refrigerator doors.