Cooling system for high density heat load

摘要

A cooling system for transferring heat from a heat load to an environment has a volatile working fluid. The cooling system includes first and second cooling cycles that are thermally connected to the first cooling cycle. The first cooling cycle is not a vapor compression cycle and includes a pump, an air-to-fluid heat exchanger, and a fluid-to-fluid heat exchanger. The second cooling cycle can include a chilled water system for transferring heat from the fluid-to-fluid heat exchanger to the environment. Alternatively, the second cooling cycle can include a vapor compression system for transferring heat from the fluid-to-fluid heat exchanger to the environment.

主权项

1. A cooling system for transferring heat from a heat load, the cooling system comprising:
a two-phase working fluid; a pump configured to increase the pressure of the working fluid without substantially increasing the enthalpy of the working fluid; a first heat exchanger in fluid communication with the pump and in direct thermal communication with the heat load; a fluid-to-fluid heat exchanger having a first fluid path in fluid communication with the first heat exchanger and the pump, and a second fluid path, the first and second fluid paths being in thermal communication with one another; a second heat transfer system in fluid communication with the second fluid path and comprising:
a second portion of the fluid-to-fluid heat exchanger; anda working fluid; wherein the heat load in direct thermal communication with the first heat exchanger causes at least a portion of the two-phase working fluid to change phase from a liquid to a gas within the first heat exchanger; and a controller operatively coupled to at least the second fluid path and configured to prevent condensation on the first heat exchanger by controlling the amount of heat transferred to the second fluid path so that a temperature of the two-phase working fluid within the first heat exchanger is above a dew point temperature of air around the first heat exchanger.