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THE INFLUENCE OF AVAILABILITY COSTS ON OPTIMAL HEAT EXCHANGER DESIGN.

Author(s) : WITTE L. C.

Type of article: Article

Summary

IN THE PAPER, SECOND-LAW EFFICIENCY IS USED TO DEVELOP A NEW TECHNIQUE FOR OPTIMIZING THE DESIGN OF HEAT EXCHANGERS. THE METHOD RELATES THE OPERATING COSTS OF THE EXCHANGER TO THE DESTRUCTION OF AVAILABILITY CAUSED BY THE EXCHANGER OPERATIO THE DESTRUCTION OF AVAILABILITY IS DIRECTLY RELATED TO THE SECOND-LAW EFFICIENCY OF THE EXCHANGER. THIS ALLOWS ONE TO FIND THE NUMBER OF TRANSFER UNITS AT WHICH THE BENEFITS OF REDUCED AVAILABILITY LOSSES ARE OFFSET BY THE COSTS OF ADDED AREA ; THIS IS THE OPTIMAL POINT. THE DETERMINATION OF THE PROPER COST OF IRREVERSIBILITY TO BE USED CAN BE HANDLED BY INCLUDING THE IRREVERSIBILITY COST IN A DIMENSIONLESS PARAMETER. IN THIS WAY, EACH HEAT EXCHANGER DESIGNER CAN ESTIMATE THE COSTS OF IRREVERSIBILITIES FOR HIS PARTICULAR SYSTEM, AND THEN USE THE GENERALIZED METHOD THAT IS DEVELOPED HEREIN FOR DETERMINING THE OPTIMAL HEAT EXCHANGER SIZE.

Details

  • Original title: THE INFLUENCE OF AVAILABILITY COSTS ON OPTIMAL HEAT EXCHANGER DESIGN.
  • Record ID : 1989-1728
  • Languages: English
  • Source: J. Heat Transf. - vol. 110 - n. 4A
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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