Critical heat flux enhancement using honeycomb porous plate in a saturated pool boiling of water-based nanofluid

Abstract

A honeycomb-structured ceramic porous plate (HPP) is used for the CHF enhancement in a saturated pool boiling. HPP is commercially available as a filter for purifying exhaust gases from combustion engines. This honeycomb porous plate has considerably smaller micro-pores on the order of 0.1 m, as compared with those for sintered metal powders, and is simply attached to the test surface without any treatment, such as spraying or sintering. Moreover, the CHF has been enhanced experimentally up to approximately three times that of a plain surface (approximately 320 W/cm2) with a heated surface of 30 mm in diameter. In this paper, we will show the CHF enhancement mechanism using HPP as well as further CHF enhancement techniques by combination of HPP and nanofluid.