In an earlier study by the authors, the applicability of the EHD technique for augmentation of pool boiling heat transfer of R-134a in a tube bundle was demonstrated. This paper reports additional experiments involving optimization of the electrode/heat transfer surface geometry as well as flow visualization studies that provide improved understanding of the EHD-enhanced pool boiling heat transfer in a tube bundle. Utilizing the flow visualization studies, it is demonstrated that combined electroconvection and improved nucleate boiling dynamics give rise to the augmented heat transfer coefficients.
Issue Section:
Boiling and Nucleation
1.
Cheung, K., Ohadi, M. and S. Dessiatoun, 1995, “Compound Enhancement of Boiling Heat Transfer of R-134a in a Tube Bundle,” ASHRAE Transactions, Vol. 101, pt. 1, in press.
2.
Cooper
P.
1990
, “EHD Enhancement of Nucleate Boiling
,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 112
, May 1990, pp. 458
–464
.3.
Fellows, B. R., Richard, R. G., and Shankland, I. R., 1991, “Electrical Characterization of Alternate Refrigerants,” Xviith International Congress of Refrigeration, Paper No. 45, Montreal, Quebec, Canada, August 1991.
4.
Jones
T. B.
1978
, “Electrohydrodynamically Enhanced Heat Transfer in Liquids—A Review
,” Advances in Heat Transfer
, Vol. 14
, pp. 107
–148
.5.
Kawahira
H.
Kubo
Y.
Yokoyama
T.
Ogata
J.
1990
, “The Effect of an Electric Field on Boiling Heat Transfer of Refrigerant 11—Boiling on a Single Tube
,” IEEE Transactions on Industry Applications
, Vol. 26
, No. 2
, pp. 359
–365
.6.
Kedzierski, M. A., and Kaul, M. P., 1993, Technical Report, “Horizontal Nucleate Flow Boiling Heat Transfer Coefficient Measurements and Visual Observations for R-12, R-134a, and R-134a/Ester Lubricant Mixtures,” Building and Fire Research Laboratory, NIST, Gaithersburg, Maryland.
7.
Kumar, A., 1994, “Experimental Investigation of Pool Boiling Heat Transfer Augmentation in R-123 Using the Electrohydrodynamic Technique and its Long Term Effects,” Master’s thesis, University of Maryland, College Park, Maryland.
8.
Ogata
J.
Yaba
A.
1993
a, “Basic Study on the Enhancement of Nucleate Boiling Heat Transfer by Applying Electric Field
,” International Journal of Heat and Mass Transfer
, Vol. 36
, No. 3
, pp. 775
–782
.9.
Ogata
J.
Yabe
A.
1993
b, “Augmentation of Boiling Heat Transfer by Utilizing the EHD Effect—EHD Behavior of Boiling Bubbles and Heat Transfer Characteristics
,” International Journal of Heat Mass Transfer
, Vol. 36
, No. 3
, pp. 783
–791
.10.
Ohadi, M. M., Papar, R. A., Ansari, A. I., and Kumar, A., 1992, “Some Observations on EHD Enhanced Boiling of R-123 in the Presence of Oil Contamination,” Proceedings of the Engineering Foundation Conference on Pool and External Flow Boiling, Santa Barbara, CA.
11.
Papar, R. A., Ohadi, M. M., Kumar, A., and Ansari, A. I., 1993, “Effect of Electrode Geometry on EHD-Enhanced Boiling of R-123/Oil Mixture,” ASHRAE Transactions, Vol. 99, Pt. 1.
12.
Singh, A., Kumar, A., Dessiatoun, S., Faani, M., Ohadi, M., and Ansari, A., 1993, “Compound EHD-Enhanced Pool Boiling of R-123 in a Liquid-to-Refrigerant Heat Exchanger,” 93-WA/HT-40, ASME Winter Annual Meeting, New Orleans, Louisiana.
This content is only available via PDF.
Copyright © 1997
by The American Society of Mechanical Engineers
You do not currently have access to this content.