Measurements for film condensation of steam, R113 and ethylene glycol on a horizontal wire-wrapped tube are reported. All measurements were made at near atmospheric vapor pressure and with coolant at around 20°C. Care was taken to avoid error due to the presence of air in the vapor. Complete wetting (film condensation) was observed in all cases. Wire diameter and pitch of winding were systematically varied and heat-transfer measurements made for a range of coolant flow rates. Data, in the form of heat flux and vapor-to-surface temperature difference, are presented. These were used to determine enhancement ratios (ratio of heat flux or heat-transfer coefficient for a wire-wrapped tube to the corresponding value for a plain tube at the same vapor-to-surface temperature difference). Enhancement ratios exceeding 3 for R113 and 2 for steam and ethylene glycol were obtained. The results are discussed in the light of earlier measurements and theory.

1.
Thomas
,
A.
,
Lorenz
,
J. J.
,
Hillis
,
D. L.
,
Yung
,
D. T.
, and
Sather
,
N. F.
, 1979, “
Performance Tests of 1MWt Shell-and-Tube and Compact Heat Exchangers for OTEC
,”
Proc. of 6th OTEC Conference
,
Washington
, D.C., Vol.
2
, Paper No. 11–1, pp.
1
12
.
2.
Rifert
,
V. G.
,
Trokoz
,
Y. Y.
, and
Zadiraka
,
V. Y.
, 1984, “
Enhancement of Heat Transfer in Condensation of Ammonia Vapor on a Bundle of Wire-Finned Tubes
,”
Heat Transfer-Sov. Res.
0440-5749,
16
(
1
), pp.
36
41
.
3.
Fujii
,
T.
,
Wang
,
W. C.
,
Koyama
,
S.
, and
Shimizu
,
Y.
, 1985, “
Heat Transfer Enhancement for Gravity Controlled Condensation on a Horizontal Tube by Coiling Wires
,”
Proc. of 2nd International Symposium on Heat Transfer
,
Tsinghua Univ.
, Beijing, Oct. 15–18, 1985;
and in
Heat Transfer Science and Technology
,
Bu-Xuan
Wang
, ed.,
Hemisphere
, New York pp.
773
780
, 1987.
4.
Marto
,
P. J.
,
Mitrou
,
E.
,
Wanniarachchi
,
A. S.
, and
Katsuta
,
M.
, 1987, “
Film Condensation of Steam on a Horizontal Wire-Wrapped Tube
,”
Proc. 2nd ASME-JSME Thermal Engineering Joint Conference
,
Honolulu
, HI, Vol.
1
, pp.
509
516
.
5.
Briggs
,
A.
,
Wang
,
H. S.
,
Murase
,
T.
, and
Rose
,
J. W.
, 2003, “
Heat Transfer Measurements for Condensation of Steam on a Horizontal Wire-Wrapped Tube
,”
J. Enhanced Heat Transfer
1065-5131,
10
, pp.
383
390
.
6.
Rose
,
J. W.
, 2002, “
An Analysis of Laminar Film Condensation on a Horizontal Wire-Wrapped Tube
,”
Trans. Inst. Chem. Eng., Part A
0263-8762,
80
(
A
), pp.
290
294
.
7.
Masuda
,
H.
, and
Rose
,
J. W.
, 1987, “
Static Configuration of Liquid Films on Horizontal Tubes With Low Radial Fins: Implications for Condensation Heat Transfer
,”
Proc. R. Soc. London, Ser. A
1364-5021,
410
, pp.
125
139
.
8.
Lee
,
W. C.
, and
Rose
,
J. W.
, 1984, “
Forced-Convection Film Condensation on a Horizontal Tube With and Without Non-Condensing Gases
,”
Int. J. Heat Mass Transfer
0017-9310,
27
, pp.
519
528
.
9.
Briggs
,
A.
,
Wen
,
X. L.
, and
Rose
,
J. W.
, 1992, “
Accurate Heat Transfer Measurements for Condensation on Horizontal, Integral-Fin Tubes
,”
ASME J. Heat Transfer
0022-1481,
114
, pp.
719
726
.
10.
Nusselt
,
W.
, 1916, “
Die Oberflächenkondensation des Wasserdampfes
,”
Z. Ver. Dt. Ing.
,
60
, pp.
569
575
.
11.
Rose
,
J. W.
, 1984, “
Effect of Pressure Gradient in Forced Convection Film Condensation on a Horizontal Tube
,”
Int. J. Heat Mass Transfer
0017-9310,
27
, pp.
39
47
.
12.
Shekriladze
,
I. G.
, and
Gomelauri
,
V. I.
, 1966, “
The Theoretical Study of Laminar Film Condensation of a Flowing Vapor
,”
Int. J. Heat Mass Transfer
0017-9310,
9
, pp.
581
591
.
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