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A Design Optimization on Coupling Joint between Exhaust Chimney of Electricity Generator and Electromagnetic Pulse (EMP) Shield

EMP 차폐를 위한 비상발전기 연도의 최적 형상 결정

  • Received : 2015.11.17
  • Accepted : 2015.12.19
  • Published : 2015.12.31

Abstract

The article presents a parametric study on geometrical design optimization for coupling the joint between a large exhaust air chimney and electromagnetic pulse (EMP) shield for gas turbine electricity generator. We conducted computational fluid dynamics (CFD) simulations on hydraulic diameters of waveguide below cutoff(WBC) ranges 800mm~1025mm, the connection distance ranges 150~450mm, and exhaust gas flow velocities at 15, 20, and 25m/s. The results show that the diameter of main chimney, connection distance, and exhaust gas velocity had impacts on flow stream at the EMP shield. To provide a fully developed stream line at three different flow velocity cases, the WBC diameter and distance of connection should be larger than 1050mm and longer than 300mm, respectively.

Keywords

EMP;Generator;Waveguide Below Cutoff;WBC Array;CFD

References

  1. S.K.Pang, Y.T.Chae, J.G.Yook, Ynna Kim, Sangin Kim, 2015, Air Stream around EMP Protective Device for Emergency Power System, Proceedings of the Geothermal Energy Engineers, Vol. 1, Korea Society of Geothermal Energy Engineers, Daejeon, Korea, pp.41-44.
  2. S. J. Lee, (2014), Demand Response Controls using On-site Electricity Generator for Emergency, KOREA ENERGY ECONOMICS INSTITUTE
  3. KOREA OCCUPATIONAL SAFETY & HEALTH AGENCY, KOSHA CODE E-84-2011, Technical Report for Design and Application of Emergency Electricity Supplier.

Acknowledgement

Supported by : 국토교통부