Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

A Method to Reduce Flow Depth of a Plate Heat Exchanger without a Loss of Heat Transfer Performance

판형 열교환기의 열전달성능 손실 없이 유동방향 길이를 축소하는 방법

  • 송귀은 (한국과학기술연구원 열 유동제어 연구센터) ;
  • 이대영 (한국과학기술연구원 열 유동제어 연구센터)
  • Published : 2006.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Optimal design of an air-to-liquid finned plate heat exchanger is considered theoretically in this study. Based on existing correlations for the pressure loss and the heat transfer in channel flows, the optimal configuration of the plate heat exchanger including the optimal plate pitch and the optimal fin pitch is obtained to maximize the heat transfer within the limit of the pressure drop for a given flow depth of the plate heat exchanger. It is found that the optimal fin pitch is about one ninth of the optimal plate pitch. In the optimal configuration, the flow and thermal condition in the channels is just at the boundary between the laminar developing and laminar fully developed states. It is also found when reducing the flow depth of plate heat exchangers for compactness, the heat transfer performance can be maintained exactly the same if the geometric parameters such as the plate thickness, plate pitch, fin thickness, and fin pitch are reduced proportional to the square root of the flow depth as long as the flow keeps laminar within the heat exchangers.

Keywords

References

  1. Sharh, R. K., 1981, Compact heat exchanger design procedures, Heat exch angers: thermal-hydraulic fundamentals and design, Hemisphere Publishing Corp., pp. 495-53
  2. Lee, D.-Y. and Vafai, K., 1999, Comparative analysis of jet impingement and microchannel cooling for high heat flux applications, Int. J. Heat and Mass Transfer, Vol. 42, pp. 1555-1568 https://doi.org/10.1016/S0017-9310(98)00265-8
  3. Teerstra, P., Culham, J. R. and Yovanovich, M. M., 1999, 'Analytical forced convection modeling of plate fin heat sinks, 16th IEEE SEMI-THERM Symposium, Paper No. 07803-5624-5
  4. Copeland, D. W., 2003, Fundamental performance limits of heatsinks, Journal of Electronic Packaging, Vol. 125, pp. 221-225 https://doi.org/10.1115/1.1569262
  5. Kays, W. M. and Crawford, M. E., 1993, Convective Heat and Mass Transfer, McGraw-Hill, pp.345-348
  6. Sparrow, E. M. and Molki, M., 1984, Turbulent heat transfer coefficients in a isothermal-wailed tube for either a built-in or free inlet, Int. J. Heat Mass Transfer, Vol. 27, No. 5, pp. 669-675 https://doi.org/10.1016/0017-9310(84)90136-4
  7. Ahmed, S. and Brundrett, E., 1971, Turbulent flow in non.-circular ducts, Part 1, Int. J. Heat Mass Transfer, Vol. 14, pp. 365-375 https://doi.org/10.1016/0017-9310(71)90156-6
  8. Bejan, A. and Sciubba, E., 1992, The optimal spacing of parallel plates cooled by forced convection, Int. Journal of Heat and mass Transfer, Vol. 35, pp. 3259- 3264 https://doi.org/10.1016/0017-9310(92)90213-C
  9. Bjorn, P., 2001, Review: Heat transfer in microchannels, Micro scale Thermo Physical Engineering, Vol. 5, pp. 155-175 https://doi.org/10.1080/108939501753222850