Effect of porous coating on critical heat flux removed by subcooled water at low flow rates


FUSION TECHNOLOGY, vol.29, no.4, pp.512-518, 1996 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 4
  • Publication Date: 1996
  • Doi Number: 10.13182/fst96-a30694
  • Title of Journal : FUSION TECHNOLOGY
  • Page Numbers: pp.512-518


The critical heat flux (CHF) is studied experimentally in vertical tubes heated directly using power current (direct current 2500 A, 15 V) and cooled with water at a low mass flow rate (0 to 0.2 Mg/m(2) . s) and at low pressure (0.1 to 0.8 MPa). A smooth tube and a tube with a porous coating layer sintered onto the inner surface were used. The tube and the porous coating layer are both made from INCONEL-600. The results (so far at moderate heat fluxes) are compared with each other and with correlations by Katto and by Weber. Enhancement of heat transfer was determined as well as a negative effect of the porous coating below the expected value of CHF.