Abstract: Combination of a water cooled condenser, a cooling tower, a compressor and several controlling components to combine into one single unit of a compound condensing system makes it much more efficient in operation. Layer arrangement is constructed where reshuffled or rearrangement is possible to give similar outcome. This helps saving of electrical energy, prolonging the life of compressor, in addition to minimize global warming.

Abstract: A method for efficient operation of cooling system by using a system capable of controlling average cooling ability. The method describes controlling of injection of refrigerant ‘ON and ‘OFF’ into evaporator alternately according to preset period of time or preset differential room temperature by constructing circuits of specific arrangement of components of cooling system which are compressor, condenser, expansion valves, evaporator(s), evaporator pressure regulator, solenoid valves and/or a three-way valve. The system functions to control of the operation of air-conditioning more or less similar to those system using Inverter to control the air-conditioning system, but is a much simpler technology, easy to repair or maintain and much less expensive, in addition to be able to apply with cooling system of the Variable Refrigerant Volume (VRV) type or multi-fancoil type.