Abstract: According to one embodiment of the invention, a cooling system for a heat-generating structure comprises a chamber and structure disposed within the chamber. The chamber has an inlet and an outlet. The inlet receives fluid coolant into the chamber substantially in the form of a liquid. The outlet dispenses the fluid coolant out of the chamber at least partially in the form of a vapor. The structure disposed within the chamber receive thermal energy from the heat generating structure and transfers at least a portion of the thermal energy to the fluid coolant. The thermal energy from the heat-generating structure causes at least a portion of the fluid coolant substantially in the form of a liquid to boil and effuse vapor upon contact with a portion of the structure. The effusion of vapor creates a self-induced flow in the chamber. The self-induced flow distributes non-vaporized fluid coolant substantially in the form of a liquid to other portions of the structure.

Abstract: According to one embodiment of the invention, a cooling system for a heat-generating structure comprises a channel having an inlet and an exit and a plurality of pin fins extending at least partially across the channel. The inlet is operable to receive a fluid coolant into the channel substantially in the form of a liquid. The exit is operable to dispense of the fluid coolant out of the channel at least partially in the form of a vapor. The plurality of pin fins are operable to receive thermal energy from the heat generating structure and transfer at least a portion of the thermal energy to the fluid coolant. The thermal energy from the heat-generating structure causes at least a portion of the fluid coolant substantially in the form of a liquid to boil and vaporize in the channel upon contact with the plurality of pin fins.

Abstract: According to one embodiment of the invention, a cooling system for a heat-generating structure that is disposed in an environment having an ambient pressure comprises a fluid coolant and three structures. The first structure allows the heat generating structure to removably couple to the cooling system. The second structure reduces 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. The third structure directs a flow of the fluid coolant in the form of a liquid at the subambient pressure in a manner causing the fluid coolant to be brought into thermal communication with the heat-generating structure where heat from the heat-generating structure causes the fluid coolant in the form of the liquid to boil and vaporize so that the fluid coolant absorbs heat from the heat-generating structure as the fluid coolant changes state.

Abstract: According to one embodiment of the invention a method for controlling cooling of a heat-generating structure disposed in an environment having an ambient pressure includes providing a fluid coolant and reducing the pressure of the coolant to a subambient pressure at which the coolant has a boiling temperature less than a temperature of the heat-generating structure. The method further includes boiling and vaporizing coolant to absorb heat from the heat-generating structure by bringing the coolant into thermal communication with the heat generating structure. The method also includes measuring a parameter indicative of a pressure of the coolant and adjusting the pressure of the coolant in response to control the cooling of the heat-generating structure.