CONDITIONS OF OPERABILITY OF MULTICIRCUIT RECUPERATIVE HEAT EXCHANGERS FOR CRYOGENIC PLANTS
DOI:
https://doi.org/10.18198/j.ind.gases.2009.0445Keywords:
Cryogenic plant, Double-flow heat exchanger, Multicircuit heat exchanger, Air separation plant, First and second laws of thermodynamics, (q–1/T)-diagram, Heat exchanger operability, Necessary and sufficient condition of heat exchanger operabilityAbstract
Multicircuit recuperative heat exchanger are widely used in cryogenic plant. By development of heat exchanger it is necessary to supervise their operability in view of the second law of thermodynamics. For double-flow heat exchanger the check of operability can be carried out only on the basis of the thermodynamic analysis of realize processes. In case of using of multicircuit devices of such analysis it is not enough for check of their operability. Sufficient conditions of multicircuit heat exchanger operability are formulated generally. They are illustrated by a number of the examples concerning to three-flow heat exchangers. The offered method allows to do without calculation of temperatures of all flows and parameters of intensity of heat exchange.
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