[Challenge] returns the system to optimal state, and, to provide a variety of methods to calculate the cost-effectiveness.
A cooling system includes a compressor for compressing a refrigerant, a condenser for condensing the refrigerant into liquid, an evaporator for evaporating the liquid refrigerant from the condenser into gaseous, liquid coolant to the evaporator an inner control loop for optimizing the supply of an external control loop for optimizing the refrigerant level in the evaporator, consists. The outer control loop, based on optimization, including measuring the evaporator performance to confirm the supply rate for said inner control loop, the internal control loop, the liquid refrigerant based on the the determined feed rate to optimize the supply. The proportion of oil in the refrigerant, the amount of refrigerant, dirt, incondensable, independent variables such as deposits or scale on the surface of the heat exchanger is estimated, or it may be measured. Not only the calculated value or the measured value of the power, for example, derived from the temperature gauge and a pressure gauge, model and / or efficiency on the influence of thermodynamic model deviations from the optimum conditions similar to the system of the system it is determined, or are used to estimate.