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FLOW PATTERNS FOR ISOTHERMAL CONDENSATION IN ONE-PASS AIR-COOLED HEAT EXCHANGERS.

Author(s) : BERG W. F., BERG J. L.

Type of article: Article

Summary

AN ANALYTIC METHOD IS DEVELOPED TO DESCRIBE THE FLOW IN EACH ROW OF TUBES OF AN AIR-COOLED ONE-PASS ISOTHERMAL CONDENSER. THIS LEADS TO A BETTER UNDERSTANDING OF SOME COMMON STEAM CONDENSER PROBLEMS, INCLUDING FREEZING OF CONDENSATE, RAPID TUBE-SIDE CORROSION, AND WORSE PERFORMANCE THAN PREDICTED BY ANY REASONABLE CONDENSING COEFFICIENT. THE NTU (NUMBER OF TRANSFER UNITS) APPROACH IS USED TO DERIVE EXPRESSIONS FOR PRESSURE DROP IN EACH ROW IN TERMS OF EXCHANGER EFFECTIVENESS. THE RESULTING SIMULTANEOUS EQUATIONS ARE SOLVED NUMERICALLY, AND THE SOLUTIONS, PRESENTED GRAPHICALLY, SHOW THE FLOW PATTERN TO BE SOLELY A FUNCTION OF EFFECTIVENESS.

Details

  • Original title: FLOW PATTERNS FOR ISOTHERMAL CONDENSATION IN ONE-PASS AIR-COOLED HEAT EXCHANGERS.
  • Record ID : 1982-0409
  • Languages: English
  • Source: Heat Transf. Eng. - vol. 1 - n. 4
  • Publication date: 1980/04
  • Document available for consultation in the library of the IIR headquarters only.

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