THE ONE INTERNAL TEMPERATURE REGIME FOR SPLIT-CONDITIONERS OF "DAIKIN" FIRM

Abstract

 The mathematical model for analyzing the work of single-stage freon refrigerating machines of split-conditioners by exergy method on various refrigerating agents is developed the authors. It is used for performe the heat balance of the evaporator and the condenser of the refrigerating machines of the air split-conditioners and calculation of their exergy efficiency and losses of exergy. During this, it was noticed that the manufacturers of air split-conditioners refer to their specifications for the standard external temperature regime, which is determined by the ambient temperature (outside air) and the temperature of the internal (recirculation) air, not taking into account the corresponding standard internal temperature regime of operation of the refrigerating machine, which is determined by the evaporation temperature of the refrigerant and its condensation temperature. And this is incorrect and leads to different values of exergy efficiency and losses of exergy in the elements of the refrigerating machine for different cooling capacity. Therefore, there is an urgent need to bring the operation of refrigerating machines of air split-conditioners to the one internal temperature regime and energy saving operation of air split-conditioners with a higher exergy efficiency. The authors summarize and propose practical recommendations for the more correct design of air conditioners, taking into account the interconnection of external and internal temperature regimes, which will increase the exergy efficiency of split-air conditioners and their energy-saving operation. It has been established that for air conditioning in the premises, the current air conditioners are recommended to use several air conditioners with low cold productivity, and not one with a large, which has a lower exergy efficiency. It is indicated that the results obtained in this article can be applied to any projected premises and for any refrigerants.