THERMAL SCIENCE

International Scientific Journal

Gun Joo Jung

,

Geun Sug Oh

,

Chul Woo Chung

,

Han Ji Kim

HEAT TRANSFER ON GROOVED HIGH DENSITY POLY ETHYLENE TUBE FOR SURFACE WATER SOURCE HEAT PUMP

ABSTRACT
High density polyethylene (HDPE) tube has been successfully utilized in surface water source heat pump (SWSHP) system as a surface water heat exchanger (SWHE). Since the heat transfer coefficient (U value) of the HDPE tube directly affects performance and energy efficiency of SWSHP, this research aims to increase U value of HDPE tube by grooving external surface of conventional 32A HDPE tube to reducing cross sectional volume. The final shape of grooved HDPE tube is similar to that of fin. In order to verify the performance of grooved HDPE tube, the U values of grooved and smooth tube were compared experimentally. According to the results, U value of grooved tube showed approximately 21.5% increase with natural convection and 23.5% with forced convection system than U values obtained from smooth tube. The reason for such increase in U value was found to be the reduction in cross sectional volume of the HDPE tube.
KEYWORDS
surface water source heat pump (swshp), surface water heat exchanger (swhe), heat transfer coefficient (u value), high density polyethylene (hdpe) tube
PAPER SUBMITTED: 2013-05-13
PAPER REVISED: 2014-02-21
PAPER ACCEPTED: 2014-02-24
PUBLISHED ONLINE: 2014-03-08
DOI REFERENCE: https://doi.org/10.2298/TSCI130513017J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Issue 4, PAGES [1327 - 1341]
REFERENCES
  1. Riznić, D. T., Kovačić, B. J., Water Temperature Adjustment in Spas by the Aid of Heat Pump, Thermal Science, 16 (2012), 4, pp. 1127-1136
  2. Al-Dabbas, M. A. A., Achievement of Geothermal Energy Using Ground Heat Exchanger in Ma'en, Journal of Mechanical Science and Technology, 25 (2011), 8, pp. 2013-2023
  3. Cho, Y., Yun, R., A Raw Water Source Heat Pump Air-conditioning System, Energy and Buildings, 43 (2011), 11, pp. 3068-3073
  4. Yu J., Zhang, H., You, S., Heat Transfer Analysis and Experimental Verification of Casted Heat Exchanger in Non-icing and Icing Conditions in Winter, Renewable Energy, 41 (2012), pp. 39-43
  5. Blarke, M. B., Lund, H., Large-scale Heat Pumps in Sustainable Energy Systems: System and Project Perspectives, Thermal Science, 11 (2007), 3, pp. 143-152
  6. Čenejac, A. R., Bjelaković, R. M., Andjelković, A. S., Djaković D. D., Covering of Heat Load of Object by Using Ground Heat as a Renewable Energy Source, Thermal Science, 16 (2012), 1, pp. S225-S235
  7. Cengel, Y. A., Heat Transfer, A Practical Approach, 2nd edition, McGraw-Hill Inc., Seoul, Korea, 2006
  8. Sieder, E. N, and Tate, G. E., Heat Transfer and Pressure Drop of Liquids in Tubes, Industrial & Engineering Chemistry, 28 (1936), 12, pp. 1429-1435
  9. Dittus, F. W., Boelter, L. M. K., Heat Transfer in Automobile Radiators of the Tubular Type, University of California Publications in Engineering, 13 (1930), p. 443-461
  10. Churchill, S. W., Bernstein, M., A Correlating Equation for Forced Convection from Gases and Liquids to a Circular Cylinder in Crossflow, Journal of Heat Transfer, 99 (1977), 2, pp. 300-306
  11. Churchill, S. W., Chu, H. H. S., Correlating Equations for Laminar and Turbulent Free Convection from a Horizontal Cylinder, International Journal of Heat and Mass Transfer 18 (1975), 9, pp. 1049-1053.
  12. ***, Heat Transfer, in: ASHRAE Handbook Fundamentals (SI Edition), American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc., Atlanta, 2005, pp. 3.1-3.35
  13. Moody, L. F., Friction Factors for Pipe Flow, Trans. Asme 66.8 (1944), pp. 671-684
  14. ***, PEM PIPE KOREA CO., LTD., www.pemkorea.com/
  15. ***, Equivalent length of fittings, The Engineering Tool Box, www.engineeringtoolbox.com/
  16. Cengel, Y. A., Heat Transfer, A Practical Approach, 2nd edition, McGraw-Hill Inc., Seoul, Korea, 2006, p.621
  17. ***, PUMP GOOD CO., pumpgood.co.kr/
  18. ***, Energy Resource Associates, www.eraenergy.com/pdfs/est_chil_ld.pdf
  19. ***, cyber KEPCO, cyber.kepco.co.kr/ckepco/front/jsp/CY/J/A/CYJAPP000.jsp#
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Heat transfer on grooved high density poly ethylene tube for surface water source heat pump

© 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