Experimental results on pool boiling heat transfer from a horizontal cylinder in an electronic cooling fluid (FC-72) are presented. The effects on the boiling curve of having air dissolved in the fluid are documented, showing that fluid in the vicinity of the heating element is apparently liberated of dissolved gas during boiling. Dissolved gas was found to influence boiling incipience only with high gas concentrations (>0.005 moles/mole). For low-to-moderate concentrations, a larger superheat is required to initiate boiling and a hysteresis is observed between boiling curves taken with increasing and decreasing heat flux steps. Boiling, a very effective mode of heat transfer, is attractive for electronics cooling. The present experiment provides further documentation of the role of dissolved gas on the incipience process and shows similarities with subcooled boiling of a gas-free fluid.

Issue Section:
Boiling Heat Transfer
Keywords:
Boiling, Electronic Equipment, Phase-Change Phenomena
Topics:
Boiling, Fluids, Pool boiling, Wetting, Computer cooling, Heat transfer, Cylinders, Electronic equipment, Heat flux, Heating, Subcooling
1.
Bar-Cohen
A.
,
1987
, “
Thermal Management of Air- and Liquid–Cooled Multichip Modules
,”
IEEE CHMT Transactions
, Vol.
19
, No.
2
, pp.
159
–
175
.
2.
Bar-Cohen
A.
, and
Simon
T. W.
,
1988
, “
Wall Superheat Excursions in the Boiling Incipience of Dielectric Fluids
,”
Heat Transfer Engrg
, Vol.
9
, No.
3
, pp.
19
–
31
.
3.
Behar, M., Courtaud, M., Ricque, R., and Semeria, R., 1966, “Fundamental Aspects of Subcooled Boiling With and Without Dissolved Gasses,” Proc. 3rd Int. Heat Trans. Conf., Vol. IV, pp. 1–11.
4.
Griffith
P.
, and
Wallis
J. D.
,
1959
, “
The Role of Surface Conditions in Nucleate Boiling
,”
Chem. Engrg. Prog. Symp. Series
, Vol.
56
, No.
30
, pp.
49
–
63
.
5.
Ivey, H. J., and Morris, D. J., 1966, “Critical Heat Flux of Saturation and Subcooled Pool Boiling in Water at Atmospheric Pressure,” Proc. 3rd Int. Heat Trans. Conf., Vol. III, pp. 129–142.
6.
Kline
S. J.
, and
McClintock
F. A.
,
1953
, “
Describing Uncertainties in Single-Sample Experiments
,”
Mechanical Engineering
, Vol.
75
, Jan., pp.
3
–
8
.
7.
Kuehn
T. H.
, and
Goldstein
R. J.
,
1976
, “
Correlating Equations for Natural Convection Heat Transfer Between Horizontal Circular Cylinder
,”
Int. J. Heat Mass Transfer
, Vol.
19
, pp.
1127
–
1134
.
8.
Lee, T. Y., and Simon, T. W., 1989, “High-Heat-Flux Forced Convection Boiling From Small Region,” Heat Transfer in Electronics, ASME HTD-Vol. 111, pp. 7–16.
9.
Lorenz, J. J., Mikic, B. B., and Rohsenow, W. M., 1974, “The Effect of Surface Condition on Boiling Characteristics,” Proc. 5th Int. Heat Trans. Conf., Vol. 4, B2.1, pp. 35–39.
10.
McAdams, W. H., Kennel, W. E., Minden, C. S., Carl, R., Picornell, P. M., and Dew, J. E., 1949, “Heat Transfer at High Rates to Water With Surface Boiling,” Industrial and Engineering Chemistry, Vol. 41, No. 9.
11.
Murphy, R. W., and Bergles, A. E., 1972, “Subcooled Flow Boiling of Fluorocarbons—Hysteresis and Dissolved Gas Effects on Heat Transfer,” Proceedings of Heat Trans. and Fluid Mech. Inst., Stanford Univ. Press, pp. 400–416.
12.
Pike, F. P., Miller, P. D., Jr., and Beatty, K. O., Jr., 1955, “Effect of Gas Evolution on Surface Boiling at Wire Coils,” Chem. Engrg. Prog. Symp. Series, Vol. 51, No. 17, pp. 13–19.
13.
Product Manual, 1987, Fluorinert Electronic Liquids, Commercial Chemical Products Div., 3M Co., St. Paul, MN.
14.
Samant
K. R.
, and
Simon
T. W.
,
1989
, “
Heat Transfer From a Small High-Heat-Flux Patch to a Subcooled Turbulent Flow
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
111
, pp.
1053
–
1059
.
15.
Sun
K. H.
, and
Lienhard
J. H.
,
1970
, “
The Peak Boiling Heat Flux on Horizontal Cylinders
,”
Int. J. Heat Mass Transfer
, Vol.
13
, pp.
1425
–
1439
.
16.
Tong
W.
,
Bar-Cohen
A.
,
Simon
T. W.
, and
You
S. M.
,
1990
, “
Contact Angle Effects on Boiling Incipience of Highly-Wetting Liquids
,”
Int. J. Heat Mass Transfer
, Vol.
33
, No.
1
, pp.
91
–
103
.
17.
Torikai, K., Shimamune, H., and Fujishiro, T., 1970, “The Effects of Dissolved Gas Content Upon Incipient Boiling Superheats,” Proc. 4th Int. Heat Trans. Conf., Vol. V, B2A1.
18.
You, S. M., 1990, “Boiling Heat Transfer With Highly-Wetting Dielectric Fluids,” Ph.D. Dissertation, University of Minnesota, MN.
19.
You
S. M.
,
Simon
T. W.
,
Bar-Cohen
A.
, and
Tong
W.
,
1990
, “
Experimental Investigation of Nucleate Boiling Incipience With a Highly Wetting Dielectric Fluid (R-113)
,”
Int. J. Heat Mass Transfer
, Vol.
33
, No.
1
, pp.
105
–
117
.
20.
Zuber, N., 1959, “Hydrodynamic Aspects of Boiling Heat Transfer,” Ph.D. Dissertation, UCLA, Los Angeles, CA.
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