Header menu link for other important links
X
Studies on critical heat flux in flow boiling at near critical pressures
, Arcot R. Balakrishnan
Published in
2006
Volume: 49
   
Issue: 1-2
Pages: 259 - 268
Abstract
Experimental studies on critical heat flux (CHF) have been conducted in a uniformly heated vertical tube of 12.7 mm internal diameter and 3 m length at different reduced pressures ranging from 0.24 to 0.99 with R-134a as the working fluid. The onset of CHF was determined by the sudden rise in the wall temperature of the electrically heated tube. Experiments were performed over a wide range of parameters: mass flux values from 200 to 2000 kg/m2 s, pressure from 10 to 39.7 bars and heat flux from 2 to 80 kW/m2 and exit quality from 0.17 to 0.94. The results show considerably lower critical heat flux at high pressures. Well known CHF prediction methods, such as the look-up table and correlations of earlier workers show poor agreement at high pressures. A new correlation has been proposed to estimate the CHF in uniformly heated vertical tubes up to the critical pressure and over a wide range of parameters. © 2005 Elsevier Ltd. All rights reserved.
About the journal
JournalInternational Journal of Heat and Mass Transfer
ISSN00179310
Open AccessNo
Concepts (11)
  •  related image
    Boiling liquids
  •  related image
    Correlation methods
  •  related image
    ELECTRIC HEATING
  •  related image
    Pressure effects
  •  related image
    Thermal effects
  •  related image
    Tubes (components)
  •  related image
    Critical heat flux (chf)
  •  related image
    CRITICAL PRESSURE
  •  related image
    INTERNAL DIAMETER
  •  related image
    Heat flux
  •  related image
    ELECTRIC HEATING