Regenerable non-venting cooler for protective suit

Details Regenerable non-venting cooler for protective suit Regenerable non-venting cooler for protective suit

F - Mech Eng,Light,Heat,Weapons

25

D

F25D 31/00 (2006.01) A62B 17/00 (2006.01) B64D 10/00 (2006.01)

Patent

CA 2061333

Abstract Regenerable Non-venting Cooler For Protective Suit A life support back pack 14 for use during extravehicular activity in space incorporates a cooling apparatus 20 comprised of five panels 22 each of which include in layered fashion a LCG coolant heat exchange coil 32, a heat distribution plate 42, and a heat dissipation module 50A or 50B having an outer radiator surface 52. Each module 50A houses a first phase change material 55A, for example hexadecane paraffin, and each module 50B houses a second phase change material 55B, for example tetradecane paraffin, which has a phase change temperature which is less than the phase change temperature of the first phase change material 55A. The cooling apparatus 20 is equipped with a coolant heat exchange circuit provided with mode selection valves 84 and 86 which are operated by a controller 88 to selectively direct the LCG coolant to be cooled through the cooling apparatus in one of three operating modes. - 31 -

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