Análisis de la eficiencia de transferencia de calor utilizando un condensador con recirculación en un sistema de refrigeración por compresión de vapor

Abstract

The present project consists in the study of a heat pump assisted by solar energy with water recirculation arrangement. It uses a 12-24 V DC variable speed compressor, a copper plate as a 0.75 m2 evaporator manifold, an electronic expansion valve and condenser, the pump in charge of recirculating the water is a 110-volt centrifugal type. This system uses solar energy for water heating using R600a refrigerant, environmentally friendly for its physical and chemical properties. By studying the steam compression cooling system, mathematical analysis of the machine is allowed. Water heating occurs in the condenser thanks to the heat transfer that occurs between the refrigerant that circulates inside the copper tubes and the water in the shell. The recirculation arrangement consists in coupling a centrifugal pump to a 5-liter tank in which the coil is located. The testing periods were developed for recirculation arrangements and without recirculation for six months, using a weather station and recording experimental data at five-minute time intervals for an average of 4 hours per day, depending on weather conditions and the rate of radiation was intended to reach a maximum temperature of 45 ° C, where an operating coefficient (COP) between 5.67 and 9.83 is appreciated, finally the results obtained are compared analytically and graphically.