Enhanced pool boiling heat transfer on mini- and micro- structured surfaces

The surfaces used for investigating nucleate pool boiling for four working fluids had mini- and micro-fins of variable configurations, cross-sections and pitches, restrained by perforated foil or mesh cloth with various pore/opening diameters. Unique enhanced structures on these surfaces formed a system of interconnected horizontal and vertical tunnels. Four structured surfaces were proposed, each being a system of subsurface tunnels connected to 10 and 5 mm fins or 1 and 0.5 mm mini-fins. Measurement results for boiling water, ethanol, Fluorinert FC-72 and R-123 from more than 60 samples constituted the database used to verify the proposed theoretical models. These models were based on the results from the visualization studies, including internal visualization allowing observation of bubble nucleation, growth and displacement inside the tunnels, and on the analysis of existing boiling models for mini- and micro-structures.

[1]  R. Pastuszko,et al.  Experimental investigations and a simplified model for pool boiling on micro-fins with sintered perforated foil , 2015 .

[2]  M. Piasecka.  Heat transfer research on enhanced heating surfaces in flow boiling in a minichannel and pool boiling , 2014 .

[3]  M. Piasecka.  Flow Boiling Heat Transfer in A Minichannel with Enhanced Heating Surface , 2014 .

[4]  M. Piasecka.  Laser Texturing, Spark Erosion and Sanding of the Surfaces and their Practical Applications in Heat Exchange Devices , 2014 .

[5]  A. Pastuszko.  Pool boiling on rectangular fins with tunnel-pore structure , 2013 .

[6]  R. Pastuszko.  Pool boiling for extended surfaces with narrow tunnels – Visualization and a simplified model , 2012 .

[7]  R. Pastuszko.  Pool boiling on micro-fin array with wire mesh structures , 2010 .

[8]  R. Pastuszko,et al.  Semi-analytical approach to boiling heat fluxes calculation in subsurface horizontal and vertical tunnels , 2008 .

[9]  R. Pastuszko.  Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels , 2008 .

[10]  R. Webb,et al.  A nucleate boiling model for structured enhanced surfaces , 1998 .

[11]  W. Nakayama,et al.  Effects of Pore Diameters and System Pressure on Saturated Pool Nucleate Boiling Heat Transfer From Porous Surfaces , 1982 .

[12]  W. Nakayama,et al.  Dynamic Model of Enhanced Boiling Heat Transfer on Porous Surfaces—Part I: Experimental Investigation , 1980 .

[13]  R. Cole,et al.  Bubble growth rates in pure and binary systems: Combined effect of relaxation and evaporation microlayers , 1975 .

[14]  B. Mikic,et al.  A New Correlation of Pool-Boiling Data Including the Effect of Heating Surface Characteristics , 1969 .