Ways to Increase the Energy Efficiency of Multi-Zone VRF Air Conditioning Systems

Ways to increase the energy efficiency of multi-zone air conditioning systems, some technologies and elements, the improvement of which directly increases energy efficiency and reduces electricity consumption in the annual cycle of using air conditioning systems based on the energy balances of thermal processes in VRF are considered. With the help of mathematical simulation methods of circuit-technical solutions and equipment operating modes of microclimate maintenance systems in public facilities using modern multi-zoned air conditioning systems the model for the selection of a multi-zone air conditioning system has been developed that takes into consideration the following factors: variable refrigerant temperature, inverter drive, recovery) and equipment (compressor, fan, heat exchangers, filters. The results of calculations based on the developed express methodology that takes into account non-stationary heat and moisture external and internal loads and the influence of factors with the selection of modern equipment are shown. The energy saving capabilities were carried out when calculating the universal objective function and mathematical modeling software by determining the payback period and the objective function values for the compared options. The comparative analysis is carried out based on the developed mathematical model of Daikin, Mitsubishi Electric, Fujitsu, Mitsubishi Heavy for objects operating during the daily cycle in extreme non-stationary mode