Share

THE INFLUENCE OF INTERFACE THERMAL CONTACT RESISTANCE ON THE HEAT TRANSFER PERFORMANCE OF PRESTRESSED DUPLEX TUBE.

Author(s) : BARBER J. R.

Type of article: Article

Summary

DUPLEX HEAT EXCHANGER TUBES CONSIST OF TWO CONCENTRIC CYLINDERS ASSEMBLED IN A STATE OF PRESTRESS BY SHRINK FITTING. DURING OPERATION, THERMAL EXPANSION CHANGES THE INTERFACE PRESSURE AND THIS CAN CAUSE A SUBSTANTIAL INCREASE IN THE THERMAL RESISTANCE OF THE TUBE. UNDER CERTAIN CIRCUMSTANCES, MORE THAN ONE STEADY-STATE SOLUTION CAN BE OBTAINED. IN THE PAPER, THE EFFECTOF THIS MECHANISM ON THE AXIAL TEMPERATURE VARIATION IN PARALLEL OR COUNTERFLOW HEAT EXCHANGERS IS ANALYZED. A METHOD IS DEVELOPED FOR INTEGRATING THE CONTROLLING EQUATIONS FOR AN ARBITRARY, NON-LINEAR, PRESSURE-DEPENDENT CONTACT RESISTANCE WITHOUT ITERATION AND THE EFFECT OF PRESTRESS AND OTHER PARAMETERS ON THE OCCURRENCE OF MULTIPLE SOLUTIONS IS DISCUSSED.

Details

  • Original title: THE INFLUENCE OF INTERFACE THERMAL CONTACT RESISTANCE ON THE HEAT TRANSFER PERFORMANCE OF PRESTRESSED DUPLEX TUBE.
  • Record ID : 1986-2241
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 29 - n. 5
  • Publication date: 1986

Links


See other articles in this issue (3)
See the source

Indexing