Estudo experimental da influência de trocadores de calor SLHX (suction/liquid heat exchanger) sobre a carga de fluido refrigerante nos aparelhos de ar condicionado tipo split

Abstract

In this Work Course Conclusion was performed an experimental study of the impact of a heat exchanger type SLHX in an air conditioning. The tests were performed in a room provided by the company DWG Climatização, the air conditioner used for the tests was an air conditioning Split of conception floor/ceiling of 30,000 BTU/h cooling capacity and a Suction/Liquid heat exchanger type tube in tube, the working fluid was R-22, also an air conditioner floor type and an electric resistance was at the evaporator outlet to control the ambient temperature, since the room was not equipped with a system of thermal control. Several tests were performed in two modes, one with conventional installation and another with the use of the heat exchanger, the research focused in results as COP, efficiency of the heat exchanger and mainly in charge of refrigerant added to the system. Data collection was done every minute consulting the temperature and pressure instruments and recorded into a worksheet to later do an average of data from each test and made the calculations, the thermodynamic properties of the fluid were obtained from the Engineering Equation SolverTM (EESTM) software library. At the end of the study it was concluded that the use of SLHX is beneficial in point of view of refrigerant charge, reaching an average savings of 16.7%, however, the COP has suffered a slight reduction of 3.14% for the working range searched.