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Title: Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels

Abstract

Complex experimental investigations of boiling heat transfer on structured surfaces covered with perforated foil were taken up. Experimental data were discussed for two kinds of enhanced surfaces formed by joined horizontal and vertical tunnels: tunnel structures (TS) and narrow tunnel structures (NTS). The experiments were carried out with water, ethanol and R-123 at atmospheric pressure. The TS and NTS surfaces were manufactured out of perforated copper foil of 0.05 mm thickness (hole diameters: 0.3, 0.4, 0.5 mm) sintered with the mini-fins, formed on the vertical side of the 5 mm high rectangular fins and horizontal inter-fin surface. The effects of hole (pore) diameters, tunnel pitch for TS and tunnel width for NTS on nucleate pool boiling were examined. Substantial enhancement of heat transfer coefficient was observed. The investigated surfaces showed boiling heat transfer coefficients similar to those of existing structures with subsurface tunnels, but at higher heat fluxes range. (author)

Authors:
 [1]
  1. Chair of Thermodynamics and Fluids Mechanics, The Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce (Poland)
Publication Date:
OSTI Identifier:
21116049
Resource Type:
Journal Article
Resource Relation:
Journal Name: Experimental Thermal and Fluid Science; Journal Volume: 32; Journal Issue: 8; Other Information: Elsevier Ltd. All rights reserved
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; POOL BOILING; TUNNELS; HEAT TRANSFER; SURFACES; EXPERIMENTAL DATA; COPPER; ETHANOL; REFRIGERANTS; FINS; FOILS; NUCLEATE BOILING; WATER; WIDTH; ATMOSPHERIC PRESSURE; HEAT FLUX; SUBSURFACE STRUCTURES

Citation Formats

Pastuszko, Robert. Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels. United States: N. p., 2008. Web. doi:10.1016/J.EXPTHERMFLUSCI.2008.04.012.
Pastuszko, Robert. Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels. United States. doi:10.1016/J.EXPTHERMFLUSCI.2008.04.012.
Pastuszko, Robert. Mon . "Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels". United States. doi:10.1016/J.EXPTHERMFLUSCI.2008.04.012.
@article{osti_21116049,
title = {Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels},
author = {Pastuszko, Robert},
abstractNote = {Complex experimental investigations of boiling heat transfer on structured surfaces covered with perforated foil were taken up. Experimental data were discussed for two kinds of enhanced surfaces formed by joined horizontal and vertical tunnels: tunnel structures (TS) and narrow tunnel structures (NTS). The experiments were carried out with water, ethanol and R-123 at atmospheric pressure. The TS and NTS surfaces were manufactured out of perforated copper foil of 0.05 mm thickness (hole diameters: 0.3, 0.4, 0.5 mm) sintered with the mini-fins, formed on the vertical side of the 5 mm high rectangular fins and horizontal inter-fin surface. The effects of hole (pore) diameters, tunnel pitch for TS and tunnel width for NTS on nucleate pool boiling were examined. Substantial enhancement of heat transfer coefficient was observed. The investigated surfaces showed boiling heat transfer coefficients similar to those of existing structures with subsurface tunnels, but at higher heat fluxes range. (author)},
doi = {10.1016/J.EXPTHERMFLUSCI.2008.04.012},
journal = {Experimental Thermal and Fluid Science},
number = 8,
volume = 32,
place = {United States},
year = {Mon Sep 15 00:00:00 EDT 2008},
month = {Mon Sep 15 00:00:00 EDT 2008}
}