International Journal of Precision Engineering and Manufacturing-Green Technology

Korean Society for Precision Engineering (한국정밀공학회)
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Double Multiple Stream Tube Analysis of Non-Uniform Wind Stream of Exhaust Air Energy Recovery Turbine Generator

  • Fazlizan, Ahmad (Solar Energy Research Institute, Universiti Kebangsaan Malaysia) ;
  • Chong, Wen Tong (Department of Mechanical Engineering, Faculty of Engineering, University of Malaya) ;
  • Yip, Sook Yee (UMPEDAC, Level 4, Wisma R&D, University of Malaya) ;
  • Poh, Sin Chew (Department of Mechanical Engineering, Faculty of Engineering, University of Malaya) ;
  • Muzammil, Wan Khairul (Department of Mechanical Engineering, Faculty of Engineering, University of Malaya)
  • Received : 2016.10.17
  • Accepted : 2017.03.21
  • Published : 2017.10.01
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Abstract

The novel exhaust air energy recovery turbine generator is designed to recover part of energy from a fan-powered exhaust air system which represented by a cooling tower. The discharge wind from the cooling tower varies throughout the radius makes it a non-uniform profile. A vertical axis wind turbine (VAWT) is placed at the outlet of a cooling tower to recover the energy. The VAWT behavior in the non-uniform wind stream from the exhaust air system is studied by experiment and double multiple stream tube (DMST) theory. A novel application of the DMST model is applied for non-uniform wind stream. The experimental results show that best horizontal position of the VAWT is at a distance of about 2/3 of the outlet radius with respect to turbine rotation. Theoretical analysis explains the wind turbine behavior in the non-uniform wind stream as acquired from the experiment. For the selected wind turbine, it is the best to match the highest wind velocity region to the wind turbine at the range of $45^{\circ}$ to $115^{\circ}$ azimuth angle. This innovative system has a huge potential due to wide application of exhaust air system globally.

Keywords

References

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