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

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

DOI QR Code

Thermal and Flow Modeling and Fin Structure Optimization of an Electrical Device with a Staggered Fin

엇갈림 휜을 갖는 전자기기의 열유동 모델링 및 휜 형상 최적 설계

  • Kim, Chiwon (School of Mechanical Engineering, Hanyang Univeristy) ;
  • Lee, Kwan-Soo (School of Mechanical Engineering, Hanyang Univeristy) ;
  • Yeo, Moon Su (Department of Automotive Engineering, Inha Technical College)
  • 김치원 (한양대학교 기계공학부) ;
  • 이관수 (한양대학교 기계공학부) ;
  • 여문수 (인하공업전문대학 자동차과)
  • Received : 2017.08.02
  • Accepted : 2017.11.15
  • Published : 2017.12.10
Download PDF
⟨ Previous Next ⟩

Abstract

Thermal and flow modeling and fin structure optimization were performed to reduce the weight of an electrical device with a staggered fin. First, a numerical model for thermal and flow characteristics was suggested, and then, the model was verified experimentally. Using the verified model, improvement in cooling performance of the cooling system through the staggered fins was predicted. As a result, 87.5% of total heat generated was dissipated through the cooling fins, and a thermal island was observed in the rotor because of low velocity of the internal air flow through the air gap. In addition, it was confirmed that the staggered fin improves the cooling performance but it also increases the total pressure drop within the cooling system, by maximizing the leading edge effect. Based on this analysis result, the effect of each design parameter on the thermal and flow characteristics was analyzed to select the main optimal design parameters, and multi-objective optimization was performed by considering the cooling performance and the fin weight. In conclusion, the optimized fin structure improved the cooling performance by 7% and reduced the fin weight by 28% without any compromise of the pressure drop.

Keywords

References

  1. Kim, C. and Lee, K.-S., 2017, Numerical investigation of the air-gap flow heating phenomena in large-capacity induction motors, International Journal of Heat Mass Transfer, Vol. 110, pp. 746-752. https://doi.org/10.1016/j.ijheatmasstransfer.2017.03.075
  2. Schiferl, R. and Lipo, T. A., 1989, Core Loss in Buried Magnet Permanent-Magnet Synchronous Motors, IEEE Transactions on Energy Conversion, Vol. 4, No. 2, pp. 279-284. https://doi.org/10.1109/60.17923
  3. Bonnett, A. H., 2001, Operating temperature considerations and performance characteristics for IEEE 841 motors, Ieee Transactions on Industry Applications, Vol. 37, No. 4, pp. 1120-1131. https://doi.org/10.1109/28.936405
  4. Yoon, M. K., Jeon, C. S., and Kauh, S. K., 2002, Efficiency increase of an induction motor by improving cooling performance, Ieee Transactions on Energy Conversion, Vol. 17, No. 1, pp. 1-6. https://doi.org/10.1109/60.986430
  5. Boglietti, A., Cavagnino, A., Staton, D., Shanel, M., Mueller, M., and Mejuto, C., 2009, Evolution and Modern Approaches for Thermal Analysis of Electrical Machines, Ieee Transactions on Industrial Electronics, Vol. 56, No. 3, pp. 871-882. https://doi.org/10.1109/TIE.2008.2011622
  6. Kim, M. S., Lee, K. S., and Um, S., 2009, Numerical investigation and optimization of the thermal performance of a brushless DC motor, International Journal of Heat and Mass Transfer, Vol. 52, No. 5-6, pp. 1589-1599. https://doi.org/10.1016/j.ijheatmasstransfer.2008.07.040
  7. Kumar, A., Marwaha, S., Marwaha, A., and Kalsi, N. S., 2010, Magnetic field analysis of induction motor for optimal cooling duct design, Simulation Modelling Practice and Theory, Vol. 18, No. 2, pp. 157-164. https://doi.org/10.1016/j.simpat.2009.10.002
  8. Huai, Y., Melnik, R. V. N., and Thogersen, P. B., 2003, Computational analysis of temperature rise phenomena in electric induction motors, Applied Thermal Engineering, Vol. 23, No. 7, pp. 779-795. https://doi.org/10.1016/S1359-4311(03)00013-9
  9. Chang, C.-C., Kuo, Y.-F., and Wang, J.-C., Chen, S.-L., 2010, Air cooling for a large-scale motor, Applied Thermal Engineering, Vol. 30, No. 11-12, pp. 1360-1368. https://doi.org/10.1016/j.applthermaleng.2010.02.023
  10. Boglietti, A., Cavagnino, A., Parvis, M., and Vallan, A., 2006, Evaluation of radiation thermal resistances in industrial motors, Ieee Transactions on Industry Applications, Vol. 42, No. 3, pp. 688-693. https://doi.org/10.1109/TIA.2006.873655