A refrigeration, air conditioning or other cooling system is disclosed. The refrigeration system includes a refrigerant storage tank fluidly connected to a refrigerant expansion device which is fluidly connected to a refrigerant evaporator for absorbing ambient heat, a refrigerant vapor compressor fluidly connected to the refrigerant evaporator and a refrigerant condenser fluidly connected to the refrigerant compressor and the refrigerant storage tank. A liquid refrigerant pump and eductor are included in the system along with a refrigerant receiving tank and associated controls that maintain the appropriate Net Positive Suction Head at the inlet to the pump along with proper flow and pressure control in the system.