SYSTEM AND METHOD FOR DELIVERING CRYOGENIC FLUID TO A SPRAY HEAD USED TO COOL AN ENCLOSED SPACE

摘要

A system for delivery of a cryogenic fluid to a spray head for use in cooling an enclosed space includes a supply tank (26) for the cryogenic fluid, a spray head (130) having a liquid supply inlet (186) and a vapor supply inlet (180), and a cryogenic liquid supply conduit (34) communicating from the supply tank to the liquid supply inlet (186) of the spray head. A vapor supply conduit (70) surrounds the spray head (130) and a portion of the liquid supply conduit (34). One or more holes (88) are provided in the liquid supply conduit (34) to allow cryogenic liquid to escape into the vapor supply conduit (70) for delivery to the vapor supply inlet (180) of the spray head. In addition, a gap (110) is provided between the liquid supply conduit (34) and the liquid supply inlet (186) of the spray head (130) such that cryogenic liquid can escape from the gap (110) into the vapor supply conduit for delivery to the vapor supply inlet of the spray head. The gap (110) between the liquid supply conduit (34) and the liquid supply inlet (186) of the spray head (130) allows for movement therebetween to accommodate thermal expansion and contraction of the components relative to one another.