scholarly journals 1001 Development of Counter-Rotating Type Tidal Stream Power Unit

2013 ◽  
Vol 2013 (0) ◽  
pp. _1001-01_-_1001-02_
Author(s):  
Kohei TAKAKI ◽  
Yuta USUI ◽  
Toshiaki KANEMOTO
Keyword(s):  
Power Unit ◽  
Stream Power ◽  
Tidal Stream ◽  
Tidal Stream Power

Counter-Rotating Type Tidal-Stream Power Unit Playing Favorable Features in Various Ocean Circumstances

2013 ◽  
Author(s):  
Yuta Usui ◽  
Kohei Takaki ◽  
Toshiaki Kanemoto ◽  
Koju Hiraki
Keyword(s):  
Power Unit ◽  
Axial Force ◽  
Wire Rope ◽  
Stream Velocity ◽  
Vertical Force ◽  
Stream Power ◽  
Tidal Stream ◽  
Tandem Propellers ◽  
Tidal Stream Power ◽  
Cable Wire

The authors have invented the unique counter-rotating type tidal-stream power unit, which is composed of the tandem propellers and the double rotational armature type peculiar generator without the traditional stator. In the unit of the downstream type, the front and the rear propellers counter-drive the outer and the inner armatures of the peculiar generator respectively, in keeping the rotational torque counter-balanced between both propellers/armatures. This paper discusses and verifies experimentally the almighty features of the power unit. The axial force acting on the pillar increases naturally with the increase of not only the stream velocity but also the drag of the tandem propellers. Besides, the tandem propellers bring the symmetrical vertical force from side to side though the single propeller brings the force in one direction. The counter-balanced torque makes it possible to moor the power unit with only one cable/wire/rope, and the behavior of the submerged unit was confirmed experimentally.

scholarly journals Performance Research of Counter-rotating Tidal Stream Power Unit

2016 ◽  
Vol 9 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Xuesong Wei ◽  
Bin Huang ◽  
Pin Liu ◽  
Toshiaki Kanemoto
Keyword(s):  
Power Unit ◽  
Stream Power ◽  
Tidal Stream ◽  
Performance Research ◽  
Tidal Stream Power

Optimization of the Rear Propeller Profile of a Counter-Rotating Type Tidal Stream Power Unit Based on CFD Simulation

2015 ◽  
Author(s):  
Bin Huang ◽  
Toshiaki Kanemoto ◽  
Ryunosuke Kawashima ◽  
Jin-Hyuk Kim
Keyword(s):  
Power Unit ◽  
Cfd Simulation ◽  
Mutual Effect ◽  
Stream Power ◽  
Power Efficient ◽  
Tidal Turbine ◽  
Tidal Stream ◽  
Tandem Propellers ◽  
Tidal Stream Power ◽  
Blade Element

In order to convert the kinetic energy of tidal stream, the authors have invented a novel counter-rotating type tidal-stream power unit, which is composed of the tandem propellers and the double rotational armature type peculiar generator without the traditional stator. The commercial code (GH-Tidal Bladed) and academic in-house code (SERG-Tidal) based on blade element momentum theory have been proven well applied to performance prediction for the traditional wind turbine and tidal turbine. However, for the counter-rotating type tidal turbine, it is very difficult to simulate the mutual effect between the tandem propellers using blade element momentum. This paper sets up a CFD model for the counter-rotating type tidal turbine and optimizes the chord and pitch distribution of the rear propeller. The predicted results are compared between the original turbine and optimized turbine, which show great improvement in power efficient after optimization.

scholarly journals Counter-Rotating Type Tidal Stream Power Unit Moored by Only One Cable

2014 ◽  
Vol 8 (12) ◽  
Author(s):  
Yuta Usui ◽  
Toshiaki Kanemoto ◽  
Kohei Takaki ◽  
Koju Hiraki
Keyword(s):  
Power Unit ◽  
Stream Power ◽  
Tidal Stream ◽  
Tidal Stream Power

scholarly journals Counter-rotating type tidal stream power unit: Excellent performance verified at offshore test

2019 ◽  
Vol 240 ◽  
pp. 052003
Author(s):  
Isao Samura ◽  
Kazuo Kuwano ◽  
Ryunosuke Kawashima ◽  
Taizo Oda ◽  
Takumi Imakyurei ◽  
...  
Keyword(s):  
Power Unit ◽  
Stream Power ◽  
Excellent Performance ◽  
Tidal Stream ◽  
Tidal Stream Power

scholarly journals Counter-Rotating Type Horizontal-Axis Bidirectional Propellers for Tidal Stream Power Unit

2017 ◽  
Vol 05 (07) ◽  
pp. 34-44 ◽  
Author(s):  
Yuki Funami ◽  
Yuji Nakanishi ◽  
Nak-Joong Lee ◽  
Bin Huang ◽  
Toshiaki Kanemoto
Keyword(s):  
Power Unit ◽  
Horizontal Axis ◽  
Stream Power ◽  
Tidal Stream ◽  
Tidal Stream Power
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