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Entropy generation of vapour condensation in the presence of a non-condensable gas in a shell and tube condenser.

Author(s) : HASELI Y., DINCER I., NATERER G. F.

Type of article: Article

Summary

This article investigates the entropy production of condensation of a vapour in the presence of a non-condensable gas in a counter current baffled shell and one-pass tube condenser. The non-dimensional entropy number is derived with respect to heat exchange between the bulk fluid and condensate, as well as heat exchange between the condensate and coolant. Numerical results show that heat transfer from the condensate to the coolant has a dominant role in generating entropy. For example, at an air mass flow rate of 330 kg/h, 93.4% of the total entropy generation is due to this source. The resultant profiles during the condensation process indicate that a higher air mass flow rate leads to a lower rate of entropy production. For example, as the air mass flow rate increases from 330 to 660 and 990 kg/h, the total entropy generation decreases from 976 to 904 and 857.2 J/s.K, respectively. By introducing a new parameter called the condensation effectiveness, a correlation is also developed for predictions of the entropy number, and an illustrative example is presented. [Reprinted with permission from Elsevier. Copyright, 2007].

Details

  • Original title: Entropy generation of vapour condensation in the presence of a non-condensable gas in a shell and tube condenser.
  • Record ID : 2008-1986
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 51 - n. 7-8
  • Publication date: 2008/04

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