Patent ID: 8651172

Claim:
A cooling system for a heat-generating structure disposed in an environment having an ambient pressure, the cooling system comprising: a heating device configured to heat fluid coolant comprising a mixture of water and antifreeze and vaporize a portion of the water into vapor while leaving an unvaporized portion of the antifreeze as liquid in the fluid coolant; a cooling loop configured to direct the fluid coolant to and from the heating device; a reservoir connected to the cooling loop, the reservoir configured to receive at least some of the unvaporized portion of the antifreeze as liquid from the cooling loop; a structure configured to reduce a pressure of the fluid coolant to a subambient pressure at which the fluid coolant has a boiling temperature less than a temperature of the heat-generating structure; and a heat exchanger in thermal communication with the heat-generating structure, the heat exchanger having an inlet port and an outlet port, the inlet port configured to receive fluid coolant in the form of a liquid, and the outlet port configured to dispense of fluid coolant out of the heat exchanger in the form of a vapor, wherein heat from the heat-generating structure causes the fluid coolant in the form of a liquid to boil and vaporize in the heat exchanger so that the fluid coolant absorbs heat from the heat-generating structure as the fluid coolant changes state.