ECONOMY OF POWER INPUTS ON THE COMPRESSOR DRIVE OF THE REFRIGERATOR OF THE SHIP SYSTEM OF AIR CONDITIONING USING INVERTER
Reduction of rotation frequency of the compressor electric drive shaft in the steam refrigerator leads to decrease in temperature pressures in the condenser and the evaporator owing to it the temperature of condensation of a coolant decreases, and the boiling temperature increases. It leads to increase in refrigerating factor and, accordingly, to decrease in specific expenses of energy on cold manufacture. The problem of definition of size of economy of power inputs as it is necessary for an estimation of economic feasibility of installation of the inverter is actual. The settlement estimation of size of economy of power inputs on a drive of the compressor of the steam refrigerator of ship central air conditioning system is executed. While carrying out the calculations it is accepted that the refrigerator is a car-one-stage unit without the regenerative heat exchanger and the process of compression of a coolant is isentropic. It is accepted that the mechanical efficiency of the compressor, efficiency of the electric drive of the compressor, isentropic efficiency are equal each 100 %, the condenser is air. Change of temperature of external air during the warm period of the year is considered. The obtained data are necessary for definition of economic feasibility of installation of the inverter.