Patent ID: 7674281

Claim:
A microenvironment system for use with a heat transfer fluid, the microenvironment system comprising: a) a microenvironment structure defining a flow passage to receive a flow of the heat transfer fluid therethrough, wherein the heat transfer fluid is a gas; and b) a fluid handling apparatus adapted to provide the flow of the heat transfer fluid through the flow passage, the fluid handling apparatus including: an insulated storage vessel; a supply of a phase change material (PCM) stored in the storage vessel and convertible from a liquid phase to a gas phase to provide a pressurized drive gas, wherein the supply of the PCM includes liquid CO 2 ; an evaporator downstream of and external to the storage vessel and adapted to boil the supply of the PCM from the liquid phase to the gas phase to form the pressurized drive gas; and a gas driven pump operable to force the flow of the heat transfer fluid through the flow passage, wherein the gas driven pump includes a gas driven motor and a fan blade; wherein: the fluid handling apparatus is configured to supply the pressurized drive gas from the evaporator to the gas driven motor to drive the gas driven motor using the pressurized drive gas; and the gas driven motor is coupled to the fan blade to rotate the fan blade to force the flow of the heat transfer fluid through the flow passage and across the evaporator to cool and remove humidity from the heat transfer fluid.