대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제25권12호
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  • Pages.1853-1860
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  • 2001
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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응축형 가스보일러 열교환기의 열전달특성에 관한 수치적 연구

The Numerical Study on the Heat Transfer Characteristics of Heat Exchanger for Condensing Gas Boiler

  • 발행 : 2001.12.01
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초록

Characteristics of fluid flow and heat transfer in a tube with disk and annular baffle for heat exchanger of condensing boiler was numerically studied. The STAR-CD code was used to solve the governing equations and the temperature and flow fields were investigated. The interval between tube and annular baffle, height and diameter of baffle were selected as important design parameters, and the effects of these parameters on heat transfer and fluid flow were studied. As a result, in the case of with interval, the pressure was decreased, but heat transfer was increased. Heat transfer was slowly increased as the size of disk and annular baffle were increased and the distance between baffles were decreased. The pressure drop was rapidly changed fur diameter and size of disk and annular baffle. In addition, it was desirable that optimal conditions to design heat exchanger were about B$\_$a/R=0.5, L/R=1.

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참고문헌

  1. Kelkar, K. M., and Patankar, S. V., 1987, 'Numerical Prediction of Flow and Heat Transfer in a Parallel Plate Channel with Staggered Fins,' ASME J. of Heat Transfer, Vol. 109, pp. 25-30
  2. Webb, B. W., and Ramadhyani, S., 1985, 'Conjugate Heat Transfer in Channel with Staggered Ribs,' Int. J. of Heat and Mass Transfer, Vol. 28, pp. 1679-1687 https://doi.org/10.1016/0017-9310(85)90142-5
  3. Berner, C., Durst, F., and McEligot, D. M., 1984, 'Flow around Baffles,' ASME J. of Heat Transfer, Vol. 106, pp. 743-749
  4. Rowley, G. J., and Patankar, S. V., 1984, 'Analysis of Laminar Flow and Heat Transfer in Tube with Internal Circumferential Fins,' Int. J. of Heat and Mass Transfer, Vol. 27, pp. 553-560 https://doi.org/10.1016/0017-9310(84)90028-0
  5. Jean, K. J., Sea, T. B., Lee, C. E., and Kim, C. B, 1999, 'Numerical Prediction of Flow and Heat Transfer in a Tube with Circumferential Fins and Circular Disks,' Conference of Reneuable and Advanced Energy Systems for the 21ST Century. pp. 11-15
  6. Gosman. D., 1997, STAR-CD Version 3.05 Users Manual, Computational Dynamics, London, England
  7. Yakhot, V., and Orszag, S. A., 1986, 'Renonnalization Group Analysis of Turbulence-I : Basic theory,' J. Scientific Computing, Vol. 1, pp. 1-51 https://doi.org/10.1007/BF01061452
  8. Yakhot, V., 1992, 'Development of Turbulence Models for Shear Flows by a Double Expansion Technique,' Phys. Fluids, A4, No.7, pp. 1510-1520 https://doi.org/10.1063/1.858424
  9. Patankar, S. V., 1977, 'Fully Developed Flow and Heat Transfer in Ducts having Streamwise- Periodic Variations of Cross Sectional Area,' ASME J. of Heat Transfer, Vol. 99, pp. 180-186
  10. Launder, B. E., 1974, 'The Numerical Computation of Turbulent Flow,' Compo Meth in Appl. Mech & Eng., Vol. 3, pp. 269-275 https://doi.org/10.1016/0045-7825(74)90029-2