EXTERNAL LOOP NONFREEZING HEAT EXCHANGER

摘要

This invention is directed to an external loop nonfreezing heat exchanger for cooling a heat transfer fluid with cryogenic fluid (10;210). The cryogenic fluid (10,210) is first pre-vaporized wit h the spent cryogenic fluid (16). The heat transfer fluid is then cooled by the vaporized cryogenic fluid (16) instead of the cryogenic fluid feed (10,210) directly.