JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Performance Analysis of the Flooded Refrigerant Evaporators for Large Tonnage Compression-Type Refrigerators Using Alternative Refrigerants
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Performance Analysis of the Flooded Refrigerant Evaporators for Large Tonnage Compression-Type Refrigerators Using Alternative Refrigerants
Kim, Nae-Hyun;
  PDF(new window)
 Abstract
Enhanced tubes are used widely in the evaporators of large tonnage compression-type refrigerators. The evaporators consist of tube bundles, and the refrigerant properties are dependent on the locations in the tube bundles. In particular, the saturation temperatures of low pressure refrigerants (R-11, R-123) are strongly dependent on the locations due to the saturation temperature-pressure curve characteristics. Therefore, for the proper design of evaporators, local property predictions of the refrigerants are necessary. In this study, a computer program that simulates the flooded refrigerant evaporators was developed. The program incorporated theoretical models to predict the refrigerant shell-side boiling heat transfer coefficients and pressure drops across the tube bundle. The program adopted an incremental iterative procedure to perform row-by-row calculations over the specified incremental tube lengths for each water-side pass. The program was used to simulate the flooded refrigerant evaporator of the "T" company operating with R-123, which yielded satisfactory results. The program was extended to predict the performance of the flooded refrigerant evaporator operating with R-11, R-123, and R-134a. The effects of bundle aspect ratio are investigated.
 Keywords
Flooded refrigerant evaporator;Computer simulation;Performance analysis;R-11;R-123;R-134a;
 Language
Korean
 Cited by
 References
1.
Webb RL, Kim NH, Principles of Enhanced Heat Transfer, 2nd Ed., Taylor and Francis Pub., 2005.

2.
Thome JR, Enhanced Boiling Heat Transfer, Hemisphere Pub., 1990.

3.
J. W. Palen, C. C. Yang, "Circulation Boiling Model for Analysis of Kettle and Internal Reboiler Performance," in Heat Exchanger for Two-Phase Applications, ASME, HTD-Vol. 27, pp. 55-61, 1981.

4.
T. W. C. Brisbane, I. R. Grant, P. B. Whalley, "A Prediction Method for Kettle Reboiler Performance," ASME Paper 80-HT-42, 1980.

5.
G. T. Polley, T., Ralston, I. R. Grant, "Forced Cross Flow Boiling in an Ideal In-Line Tube Bundle," ASME Paper 80-HT-46, ASME/AIChE Heat Transfer Conference, Orlando, FL., 1980.

6.
R. L. Webb, K.-D. Choi, T. R. Apparao, "A Theoretical Model for Prediction of the Heat Load in Flooded Refrigerant Evaporators," ASHRAE Trans. Vol. 95, pt. 1, pp. 326-348, 1989.

7.
T. S. Ravigururajan, A. E. Bergles, "Development and Verification of General Correlations for Pressure Drop and Heat Transfer in Single-Phase Turbulent Flow in Enhanced Tubes," Exp. Thermal Fluid Sci., Vol. 13, pp. 55-70, 1996. DOI: http://dx.doi.org/10.1016/0894-1777(96)00014-3 crossref(new window)

8.
R. L. Webb, R. Narayanamurthy, P. Thors, "Heat Transfer and Friction Characteristics of Internal Helical-Rib Roughness," J. Heat Transfer, Vol. 122, pp. 134-142, 2000. DOI: http://dx.doi.org/10.1115/1.521444 crossref(new window)

9.
J. C. Chen, "A Correlation for Boiling Heat Transfer to Saturated Fluids in Convective Flow," ASME 63-HT-34, 6th National Heat Transfer Conference, Boston, 1963.

10.
K. Stephan, M. Abdelsalam, "Heat Transfer Correlations for Natural Convection Boiling," Int. J. Heat Mass Trans., Vol. 23, pp. 73-87, 1980. DOI: http://dx.doi.org/10.1016/0017-9310(80)90140-4 crossref(new window)

11.
M. G. Cooper, "Saturation Nucleate Pool Boiling - A Simple Correlation," International Chemical Engineering Symposium Series, No. 86, pp. 785-792. 1984. DOI: http://dx.doi.org/10.1016/b978-0-85295-175-0.50013-8 crossref(new window)

12.
R. L. Webb, C. Pais, "Nucleate Pool Boiling Data for Five Refrigerants on Plain, Integral-Fin and Enhanced Tube Geometries," Int. J. Heat Mass Trans., Vol. 35, No. 8, pp. 1893-1904, 1992. DOI: http://dx.doi.org/10.1016/0017-9310(92)90192-U crossref(new window)

13.
ESDU, "Convective heat transfer during cross flow of fluids over plain tube banks," Item No. 73031, Engineering Science Data Unit, London, 1973.

14.
L. Bennent, M. W. Davies, B. L. Hertzler, "The Suppression of Saturated Nucleate Boiling by Convective Flow," AIChE Symposium Series, Vol. 76, No. 199, pp. 91 -103, 1980.

15.
L. Bennet, J. C. Chen, "Forced Convective Boiling in Vertical Tubes for Saturated Pure Components and Binary Mixtures," AIChE J., Vol. 26, No. 3, pp. 454-461, 1980. DOI: http://dx.doi.org/10.1002/aic.690260317 crossref(new window)

16.
M. K. Jensen, J. T. Hsu, "A Parametric Study of Boiling Heat Transfer in a Tube Bundle," Proceedings of the 1987 ASME-JSME Thermal Engineeing Joint Conference, Vol. 3, pp. 133-140, 1987.

17.
D. S. Schrage, J. T. Hsu, M. K. Jensen, "Void Fractions and Two Phase Multipliers in a Horizontal Tube Bundle," AIChE Symposium Series Vol. 83, No. 257, pp. 1-8, 1987.

18.
K. Ishihara, J. W. Palen, J. Taborek, "Critical Review of Correlations for Predicting Two-Phase Flow Pressure Drop Across Tube Banks," Heat Transfer Engineering, Vol. 1, No. 3, pp. 23-32, 1980. DOI: http://dx.doi.org/10.1080/01457638008939560 crossref(new window)

19.
P. Payvar, "Analysis of Performance of Full Bundle Submerged Boilers," in Two-Phase Heat Exchanger Symposium, HTD-Vol. 44, pp. 11-18, 1985.