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

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

A Study on Numerical Analysis of Thermal Stress for an Monolith Ceramic Heat Exchanger

일체형 세라믹 열교환기의 전산 열응력 해석에 관한 연구

  • Paeng, Jin-Gi (Shoal of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Kim, Ki-Chul (Department of Mechanical Engineering, Graduate School, Changwon National University) ;
  • Yoon, Young-Hwan (Department of Mechanical Engineering, Changwon National University)
  • Published : 2009.11.10
Download PDF
⟨ Previous Next ⟩

Abstract

The thermal stresses of a ceramic heat exchanger were analyzed numerically since the ceramic material is good in heat resistance but weak in the thermal stress. The analysis of thermal stress was conducted in the ceramic core with two boundary conditions depending on bolt jointing. The thermal stresses were computed by applying temperature and pressure distributions obtained from the numerical results of conjugate heat transfer to ANSYS WORKRBENCH. When number of bolt joining halls was reduced from $8\times2$ to $4\times2$, the maximum principal stresses decrease by 47.6~50.5% and increase in safety factors by 2.18~2.5 for ultimate tensile strength. Thus, it can be said that bolt joining halls should be minimized in ceramic heat exchanger to be efficient in reducing thermal stress. In addition, the width of particular gas flow passages were revised from 52 mm to 42 mm to reduce maximum thermal stresses since certain passages experienced high thermal stresses. From the revision, safety factors were increased by 13.8~14.1% for the boundary condition of $4\times2$ bolt joining halls. Therefore, it is suggested that thermal stress can be reduced by changing local geometry of a ceramic heat exchanger.

Keywords

References

  1. Bourisa, D., Konstantinidisa, E., Balabanib, S., Castigliab, D. and Bergeles, G., 2005, Design of a Novel Intensified Heat Exchanger for Reduced Fouling Rates, Inter. J. Heat and Mass Transfer, Vol. 48, No. 18, pp. 318-3822
  2. Tsuzuki, N., Katoa, Y. and Ishiduka, T., 2007, High Performance Printed Circuit Heat Exchanger, Applied Thermal Eng, Vol. 27, No. 10, pp. 1702-1707 https://doi.org/10.1016/j.applthermaleng.2006.07.007
  3. Yang, C. H., Yu, M. T., Heng, C. and Chen, C. H., 2008, Performance Simulation and Thermal Stress Analysis of Ceramic Recuperators Formed by SiC and MAS, Numerical Heat Transfer Part-A, Vol. 53, pp. 709-725 https://doi.org/10.1080/10407780701715794
  4. Park, K. S., Choi, C. G., Nam, J. H., Shin, D. H., Jung, T. Y., Park, S. H. and Kim, C. S., 2008, A Study on Theory Analysis and CFD Simulation for Design of High Efficiency Ceramic Exchanger, The Korean Society for Energy Engineering, pp. 179-186
  5. Paeng, J. G. and Yoon, Y. H., 2009, A Theoretical Analysis and CFD Simulation on the Ceramic Heat Exchange, SAREK, Vol. 21, No. 5, pp. 282-290
  6. Lee, W. S., Jung, G. C. and Choi, Y. S., 2007, ADINA/FSI Analysis of Petrochemical Plant Column Mixer, KSNVE, Vol. 17, No. 13, pp. 213-219 https://doi.org/10.5050/KSNVN.2007.17.3.213
  7. Choi, B. L., 2007, Thermal Fatigue Life Prediction of Engine Exhaust Manifold, Transaction of KSAE, Vol. 15, No. 1, pp. 139-145
  8. Park, Y. H., Woo, C. S., Kim, K. S. and Kim, Y. Y., 1994, The Heat transfer and thermal stress analysis on the ceramic core of the box-type Recuperator, The Korean Society of Mechanical Engineers, pp. 217-276
  9. Kim, H. K., Lee, Y. I. and Joe, S. M., 2006, FEM Analysis on Temperature Distribution and Thermal Stress of a Brake Drum for Large Commercial Vehicle, The Korean Society of Safety, Vol. 21, No. 6, pp. 7-12
  10. Nieh, T. G., Lesuer, D. R. and Syn, C. K., 1995, Tensile and Fatigue Properties of A 25 VOL% Sic Particulate Reinforced 6090 Al Composite at ${300^{\circ}C}$, Scripta Metallurgica et Materialia, Vol. 32, No. 5, pp. 707-712 https://doi.org/10.1016/0956-716X(95)91590-L