Systematic studies of continuous fin-and-tube tube heat exchangers under dehumidifying conditions are reported in the present study. The heat exchangers consist of nine fin-and-tube heat exchangers having plane fins. The effects of fin spacing, the number of tube row, and inlet conditions are investigated. Data are presented in terms of j factors and friction factors f. It is found that the inconsistencies in the open literature may be associated with the wet fin efficiency. A correlation is proposed for the present plate fin configuration; this correlation can describe 92 percent of j, and 91 percent of the f data within ±10 percent.
Issue Section:
Heat Exchangers
1.
ARI Standard 410-91, 1991, Forced-Circulation Air-Cooling and Air-Heating Coils, Air-Conditioning & Refrigeration Institute, Arlington, VA.
2.
ASHRAE Standard 33-78, 1978, Method of Testing Forced Circulation Air Cooling and Air Heating Coils, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA.
3.
ASHRAE Standard 41.1-1986, 1986, Standard Method for Temperature Measurement, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA.
4.
ASHRAE Standard 41.2-1987, 1987, Standard Methods for Laboratory Air-Flow Measurement, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA.
5.
Bryan
W. L.
1961
, “Heat and Mass Transfer in Dehumidifying Surface Coils
,” ASHRAE Transactions
, Vol. 67
, pp. 393
–405
.6.
Bryan
W. L.
1962
, “Heat and Mass Transfer in Dehumidifying Extended Surface Coils
,” ASHRAE Transactions
, Vol. 68
, pp. 237
–247
.7.
Bump
T. R.
1963
, “Average Temperatures in Simple Heat Exchangers
,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 85
, No. 2
, pp. 182
–183
.8.
Chang, W. R., Wang, C. C., Tsi, W. C., and Shyu, R. J., 1995, “Air-Side Performance of Louver Fin Heat Exchanger,” 4th ASME/JSME Thermal Engineering Joint Conference, Vol. 4, pp. 467–372.
9.
Chen
Z. Q.
Ren
J.
1988
, “Effect of Fin Spacing on the Heat Transfer and Pressure Drop of a Two-Row Plate Fin and Tube Heat Exchanger
,” International Journal of Refrigeration
, Vol. 11
, pp. 456
–360
.10.
Eckels
P. W.
Rabas
T. J.
1987
, “Dehumidification: On the Correlation of Wet and Dry Transport Process in Plate Finned-Tube Heat Exchangers
,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 109
, pp. 575
–582
.11.
Elmahdy, A. H., 1975, “Analytical and Experimental Multi-Row, Finned-Tube Heat Exchanger Performance During Cooling and Dehumidification Process,” Ph.D. thesis, Carleton University, Ottawa, Canada.
12.
Elmahdy
A. H.
Biggs
R. C.
1983
, “Efficiency of Extended Surfaces With Simultaneous Heat Transfer and Mass Transfer
,” ASHRAE Transactions
, Vol. 89
, Part 1A, pp. 135
–143
.13.
Fu, W. L., Wang, C. C., and Chang, C. T., 1995, “Effect of Anti-Corrosion Coating on the Thermal Characteristics of a Louvered Finned Heat Exchanger Under Dehumidifying Condition,” Advances in Enhanced Heat/Mass Transfer and Energy Efficiency, ASME HTD-Vol. 320/PID-Vol. 1, pp. 75–81.
14.
Gnielinski
V.
1976
, “New Equation for Heat and Mass Transfer in Turbulent Pipe and Channel Flow
,” International Chemical Engineering
, Vol. 16
, pp. 359
–368
.15.
Hong
T. K.
Webb
R. L.
1996
, “Calculation of Fin Efficiency for Wet and Dry Fins
,” International Journal of HVAC & R Research
, Vol. 2
, No. 1
, pp. 27
–41
.16.
Jacobi
A. M.
Goldschmidt
V. W.
1990
, “Low Reynolds Number Heat and Mass Transfer Measurements of an Overall Counterflow, Baffled, Finned-Tube, Condensing Heat Exchanger
,” International Journal of Heat and Mass Transfer
, Vol. 33
, pp. 755
–765
.17.
Kandlikar, S. G., 1990, “Thermal Design Theory for Compact Evaporators,” Compact Heat Exchangers, R. K. Kraus et al., eds., Hemisphere Publishing Corp., New York, NY, pp. 245–286.
18.
Kays, W. M., and London, A. L., 1984, Compact Heat Exchanger, 3rd edition, McGraw-Hill, New York, NY.
19.
McQuiston
F. C.
1975
, “Fin Efficiency With Combined Heat and Mass Transfer
,” ASHRAE Transactions
, Part 1, Vol. 81
, pp. 350
–355
.20.
McQuiston
F. C.
1978
a, “Heat Mass and Momentum Transfer Data for Five Plate-Fin Tube Transfer Surface
,” ASHRAE Transactions
, Part 1, Vol. 84
, pp. 266
–293
.21.
McQuiston
F. C.
1978
b, “Correlation of Heat, Mass, and Momentum Transport Coefficients for Plate-Fin-Tube Heat Transfer Surfaces With Staggered Tubes
,” ASHRAE Transactions
, Part 1, Vol. 84
, pp. 294
–309
.22.
McQuiston, F. C., and Parker, J. D., 1994, Heating, Ventilating, and Air Conditioning, 4th edition, John Wiley & Sons, Inc., New York, NY, p. 594.
23.
Mirth
D. R.
Ramadhyani
S.
1993
, “Prediction of Cooling-Coils Performance Under Condensing Conditions
,” International Journal Heat and Fluid Flow
, Vol. 14
, No. 4
, pp. 391
–400
.24.
Mirth
D. R.
Ramadhyani
S.
1994
, “Correlations for Predicting the Air-Side Nusselt Numbers and Friction Factors in Chilled-Water Cooling Coils
,” Experimental Heat Transfer
, Vol. 7
, pp. 143
–162
.25.
Moffat
R. J.
1988
, “Describing the Uncertainties in Experimental Results
,” Experimental Thermal and Fluid Science
, Vol. 1
, pp. 3
–17
.26.
Myers, R. J., 1967, “The Effect of Dehumidification on the Air-Side Heat Transfer Coefficient for a Finned-Tube Coil,” M. S. Thesis, University of Minnesota, Minneapolis.
27.
Moffat
R. J.
1988
, “Describing the Uncertainties in Experimental Results
,” Experimental Thermal and Fluid Science
, Vol. 1
, pp. 3
–17
.28.
Rich
D. G.
1973
, “The Effect of Fin Spacing on the Heat Transfer and Friction Performance of Multi-Row, Plate Fin-and-Tube Heat Exchangers
,” ASHRAE Transactions
, Part 2, Vol. 79
, pp. 137
–145
.29.
Rich
D. G.
1975
, “The Effect of the Number of Tube Rows on Heat Transfer Performance of Smooth Plate Fin-and-Tube Heat Exchanger
,” ASHRAE Transactions
, Part 1, Vol. 81
, pp. 307
–317
.30.
Schmidt
Th. E.
1949
, “Heat Transfer Calculations for Extended Surfaces
,” Refrigerating Engineering
, Vol. 49
, pp. 351
–357
.31.
Senshu
T.
Hatada
T.
Ishibane
K.
1981
, “Heat and Mass Transfer Performance of Air Coolers Under Wet Conditions
,” ASHRAE Transactions
, Part 2, Vol. 87
, pp. 109
–115
.32.
Seshimo
Y.
Ogawa
K.
Marumoto
K.
Fujii
M.
1988
, “Heat and Mass Transfer Performances on Plate Fin and Tube Heat Exchangers With Dehumidification
,” Transactions JSME
, Vol. 54
, No. 499
, pp. 716
–721
.33.
Shah, R. K., 1988, “Plate-Fin and Tube-Fin Heat Exchanger Design Procedures,” Heat Transfer Equipment Design, R. K. Shah et al., eds., Hemisphere Publishing Corp., Washington, DC, pp. 255–266.
34.
Threlkeld, J. L., 1970, Thermal Environmental Engineering, Prentice-Hall, Inc., New York, NY.
35.
Wang
C. C.
Hsieh
Y. C.
Chang
Y. J.
Lin
Y. T.
1996
a, “Sensible Heat and Friction Characteristics of Plate Fin-and-Tube Heat Exchangers Having Plane Fins
,” International Journal of Refrigeration
, Vol. 19
, No. 4
, pp. 223
–230
.36.
Wang, C. C., W. L., Fu, Chang, C. T., 1996b, “Heat Transfer and Friction Characteristics of Typical Wavy Fin-and-Tube Heat Exchangers,” Experimental Thermal and Fluid Science, in press.
37.
Wang
C. C.
Chen
P. Y.
Jang
J. Y.
1996
c, “Heat Transfer and Friction Characteristics of Convex-Louver Fin-and-Tube Heat Exchangers
,” Experimental Heat Transfer
, Vol. 9
, No. 1
, pp. 61
–78
.38.
Wu
G.
Bong
T. Y.
1994
, “Overall Efficiency of a Straight Fin With Combined Heat and Mass Transfer
,” ASHRAE Transactions, Part 1
, Vol. 100
, pp. 367
–374
.39.
Uv
E. H.
Sonju
O. K.
1992
, “Heat Transfer Measurements of Circular Finned Tubes With and Without Partial Condensation
,” Institute of Chemical Engineers Symposium Series
, Vol. 1
, No. 129
, pp. 295
–302
.
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