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A simple method for calculating the maximun heat transfer rate of a counterflow heat exchanger.

Number: pap. ID: 345

Author(s) : SIERES J., MARTíNEZ-SUÁREZ J. A., VARAS F., et al.

Summary

The heat transfer effectiveness is one of the basic design methods used in heat exchanger analysis. It can be used to determine the total heat transfer rate between the hot and cold fluids of a heat exchanger, when the maximum or ideal heat transfer rate is known. This paper presents a method to evaluate the maximum heat transfer rate that can occur in a counter-current heat exchanger. It considers the possibility that one or both fluids may undergo a phase change and also that either fluid may behave as a pure fluid or a zeotropic mixture. Depending on the inlet conditions of the hot and cold fluids, the maximum possible heat transfer rate may be obtained when the outlet temperature of one fluid equals the inlet temperature of the other or when an internal temperature pinch occurs. Expressions to determine the maximum heat transfer rate for each situation are presented.

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Pages: 8 p.

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Details

  • Original title: A simple method for calculating the maximun heat transfer rate of a counterflow heat exchanger.
  • Record ID : 30002547
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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