ABSTRACT
CHAPTER
One of the critical components of many cryogenic systems, such as liquefiers and cryocoolers, is the heat exchanger. In some conventional systems, such as regener ative gas turbine power plants, the system will operate even if the heat exchanger is not highly effective, say less than 50%. In contrast, a cryogenic liquefier will pro duce no liquid if the heat exchanger effectiveness is less than approximately 85% (Barron 1985, 127-131). In this chapter, some of the design principles for several types of heat exchangers commonly used for cryogenic service will be examined. These heat exchangers include the Giauque-Hampson exchanger, the plate-fin exchanger, and the perforated plate exchanger. Secondary effects, including lon gitudinal conduction and variable specific heat, will also be considered because they may become of primary importance in high-performance cryogenic heat ex changers. The storage-type heat exchanger or regenerator is extensively used in cryogenic systems because of some of its characteristics listed in Section 6-9. The design of regenerators will also be covered.
