THERMAL SCIENCE

International Scientific Journal

Hui-Fan Zheng

,

Xiao-Wei Fan

,

Fang Wang

,

Yao-Hua Liang

CHARACTERISTICS OF A MICRO-FIN EVAPORATOR: THEORETICAL ANALYSIS AND EXPERIMENTAL VERIFICATION

ABSTRACT
A theoretical analysis and experimental verification on the characteristics of a micro-fin evaporator using R290 and R717 as refrigerants were carried out. The heat capacity and heat transfer coefficient of the micro-fin evaporator were investigated under different water mass flow rate, different refrigerant mass flow rate, and different inner tube diameter of micro-fin evaporator. The simulation results of the heat transfer coefficient are fairly in good agreement with the experimental data. The results show that heat capacity and the heat transfer coefficient of the micro-fin evaporator increase with increasing logarithmic mean temperature difference, the water mass flow rate and the refrigerant mass flow rate. Heat capacity of the micro-fin evaporator for diameter 9.52 mm is higher than that of diameter 7.00 mm with using R290 as refrigerant. Heat capacity of the micro-fin evaporator with using R717 as refrigerant is higher than that of R290 as refrigerant. The results of this study can provide useful guidelines for optimal design and operation of micro-fin evaporator in its present or future applications.
KEYWORDS
micro-fin evaporator, simulation, R290, R717, heat capacity
PAPER SUBMITTED: 2013-02-26
PAPER REVISED: 2013-05-03
PAPER ACCEPTED: 2013-05-14
PUBLISHED ONLINE: 2013-12-28
DOI REFERENCE: https://doi.org/10.2298/TSCI1305443Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2013, VOLUME 17, ISSUE Issue 5, PAGES [1443 - 1147]
REFERENCES
  1. Paisarn, N., Study on the Heat Transfer and Flow Characteristics in a Spiral-Coil Tube, International Communications in Heat and Mass Transfer, 38 (2011), 1, pp. 69-74
  2. Ho, J. C., Wijeysundera, N. E., Study of a Compact Spiral-Coil Cooling and Dehumidifying Heat Exchanger, Applied Thermal Engineering, 16 (1996), 10, pp. 777-790
  3. Sapali, S. N., Pradeep, A. P., Heat Transfer during Condensation of HFC-134a and R-404A inside of a Horizontal Smooth and Micro-Fin Tube, Experimental Thermal and Fluid Science, 34 (2010), 8, pp. 1133-1141
  4. Thundil, K. R., Srikanth, G., Shell Side Numerical Analysis of a Shell and Tube Heat Exchanger Considering the Effects of Baffle Inclination Angle on Fluid Flow, Thermal Science, 16 (2012), 4, pp. 1165- 1174
  5. Kuo, C. S., Chi, C., Horizontal Flow Boiling of R22 and R407c in a 9.52mm Micro-Fin Tube
  6. Colombo, L. P. M., et al., Flow Patterns, Heat Transfer and Pressure Drop for Evaporation and Condensation of R134A in Micro-Fin Tubes, International Journal of Refrigeration, 35 (2012), 8, pp. 2150-2165
  7. Shanthi, R., et al., Heat Transfer Enhancement Using Nanofluids an Overview, Thermal Science, 16 (2012), 2, pp. 423-444
  8. Khalid, N., Flow and Heat Transfer Characteristics Downstream of a Porous Sudden Expansion: A Numerical Study, Thermal Science, 15 (2011), 2, pp. 389-396
  9. Kim, Y., Evaporation Heat Transfer Characteristics of R410A in 7 and 9. 52 mm Smooth/Micro-fin Tubes, International Journal of Refrigeration, 25 (2002), 1, pp. 716-730
  10. Brognaux, L. J., Webb, R. L., Single-Phase Heat Transfer in Micro-Fin Tubes. International Journal of Heat Mass Transfer, 40 (1997), 18, pp. 4345-4357
  11. Ding, G. L., Zhang, C. L., Simulation and Optimization of Refrigeration and Air Conditioning Unit
  12. Wu, Y. Z., Small Refrigeration Equipment Design Guidelines
  13. Zheng, H. F., The Performance Research of the Solar Ejector/Electric Compression Combined Refrigeration System, Xi'an University of Architecture and Technology, Xi'an, China, 2009
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Characteristics of a micro-fin evaporator: Theoretical analysis and experimental verification

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence