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Enhanced pool boiling CHF in FC-72 from modulated porous layer coating

DOI: 10.1615/ICHMT.2004.IntThermSciSemin.830
pages 673-678

Klemen Ferjancic
Fagot, d.o.o., Ljubljana, Slovenia

D. Rajselj
Kekovaricon, d.o.o., Zuzemberk, Slovenia University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana, Slovenia

Iztok Golobic
Faculty of Mechanical Engineering, University of Ljubljana, Aškerceva cesta 6, SI-1000 Ljubljana, Slovenia


A modulated porous layer coating is effective in enhancing nucleate boiling. A modulated porous layer coating, which is defined as periodically non-uniform thickness, was made from 200 μm and 50 μm copper particles sintered to form cons with 1 mm height at 1 mm distances of 0.5 mm. With respect to plain copper surface, the critical heat flux at saturated pool boiling in FC-72 with the use of modulated porous layer coatings at cluster cone height of 0.5 mm was greater by a factor of 1.3, and at a height of 1 mm it was greater by a factor of 2.3.

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