Content area
Full text
(ProQuest: ... denotes non-US-ASCII text omitted.)
Jin-Hyuk Kim 1 and Risa Kasahara 2 and Toshiaki Kanemoto 2 and Toru Miyaji 2 and Young-Seok Choi 1 and Joon-Hyung Kim 1 and Kyoung-Yong Lee 1 and Ahmed Mohamed Galal 3
Academic Editor:Jinjia Wei
1, Thermal & Fluid System R&BD Group, Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-822, Republic of Korea
2, Faculty of Engineering, Kyushu Institute of Technology, Sensui 1-1, Tobata, Kitakyushu, Fukuoka 804-8550, Japan
3, Faculty of Engineering, Mansoura University, Gomhoriyya Street, Mansoura 35516, Egypt
Received 5 March 2014; Accepted 23 April 2014; 27 May 2014
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
1. Introduction
To extract efficiently the renewable energy resources from nature such as hydro, wind, solar, and ocean, there have been increasing interests in the advanced technologies for the power stabilization system in the past several years. However, it is difficult to supply unceasingly the stable power from such nature resources, owing to unforeseen circumstances by an abrupt change in the weather. Thus, the power stabilization system should be certainly advanced to effectively solve the aforementioned problems, with various ideas. Lately, Kanemoto and his colleagues [1-3] have proposed the newly power stabilization system by using the counterrotating type pump-turbine unit with the pumped storage. They demonstrated that this system can instantaneously stabilize the output from the unstable power station with a wind turbine by using the counterrotating type pump-turbine unit. This innovative technology is available for not only the wind power but also all the foregoing renewable energies.
Experimental and computational studies of pump and pump-turbine units with the counterrotating technique have been conducted to understand their internal flow mechanisms and to enhance hydrodynamic performances. The advantages of this counterrotating technique were demonstrated already by many researchers [4-6]. Add to this Kanemoto and Oba [7] have invented the unique double rotational armatures coupled with the counterrotating type impellers or runners to suppress the unstable performance and cavitation throughout the entire operation region. They have called such features "smart control" for thirteen years [8]. Meanwhile, Momosaki et al. [4] performed both the numerical and experimental tests...