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; an air-to-fluid heat exchanger in fluid communication with the pump and in thermal communication with the heat load; a fluid-to-fluid heat exchanger having a first fluid path in fluid communication with the air-to-fluid 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;a single phase working fluid; anda pump; wherein air passing through the air-to-fluid heat exchanger causes at least a portion of the two-phase working fluid to change phase from a liquid to a gas within the air-to-fluid heat exchanger; and a controller operatively coupled to at least the second fluid path and configured to prevent condensation on the air-to-fluid 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 air-to-fluid heat exchanger is above a dew point temperature of the air passing through the air-to-fluid heat exchanger.