PUMP ARRANGEMENT FOR PROVIDING A SATURATED LIQUID

A pump arrangement for providing a saturated or subcooled liquid is proposed, comprising a tank (4) for saturated liquid having a tank outlet (8), a heat exchanger (14) for cooling the saturated liquid, the heat exchanger having a liquid inlet, a liquid outlet, a coolant inlet and a coolant outlet, a pump (24) having a pump inlet and a pump outlet, an expansion valve (32) having a expansion valve inlet and a expansion valve outlet, and a pump arrangement output downstream the pump outlet for feeding saturated or subcooled liquid to a consumer (10), wherein the tank outlet is in fluid communication with the liquid inlet of the heat exchanger, such that saturated liquid stored inside the tank is able to flow into the heat exchanger, wherein the heat exchanger is designed to sub-cool the saturated liquid, wherein the liquid outlet of the heat exchanger is in fluid communication with the pump inlet, wherein the expansion valve outlet is in fluid communication with the coolant inlet of the heat exchanger, and wherein the expansion valve inlet is arranged downstream the liquid outlet of the heat exchanger or the tank for receiving and expanding a fraction of liquid flowing through the pump arrangement and routing it into the coolant input to at least partially evaporate and receive evaporation enthalpy of the liquid to be subcooled.