scholarly journals Characteristics of Air Chamber for Fixed Condition of Floating Type Wave Power Generating System

2003 ◽  
Vol 2003 (0) ◽  
pp. 79
Author(s):  
Masami Suzuki ◽  
Yukihisa Washio ◽  
Toshiari Kuboki ◽  
Chuichi Arakawa
Keyword(s):  
Wave Power ◽  
Type Wave ◽  
Air Chamber ◽  
Fixed Condition ◽  
Floating Type ◽  
Generating System

scholarly journals A Study on Characteristics of Generated Output of the Offshore Floating Type Wave Power Device “Mighty Whale”

2001 ◽  
Vol 2001 (190) ◽  
pp. 395-405 ◽  
Author(s):  
Washio Yukihisa ◽  
Osawa Hiroyuki ◽  
Ogata Teruhisa ◽  
Nakagawa Hiroyuki ◽  
Okayama Shuzou ◽  
...  
Keyword(s):  
Power Device ◽  
Wave Power ◽  
Type Wave ◽  
Floating Type

Floating Type Ocean Wave Power Station (Wells Type Runner Work Submerged in Seawater)

2013 ◽  
Author(s):  
Shun Okamoto ◽  
Toru Eshima ◽  
Toshiaki Kanemoto ◽  
Toshihiko Umekage
Keyword(s):  
Power Unit ◽  
Ocean Wave ◽  
Oscillating Flow ◽  
Wave Power ◽  
Power Station ◽  
Type Wave ◽  
Fixed Type ◽  
Preliminary Research ◽  
Floating Type ◽  
Rotational Direction

The authors have invented the unique ocean wave power station, which is composed of the floating type platform with a pair of floats lining up at the interval of one wave pitch and the counter-rotating type wave power unit boarding on the middle position of the platform. Such profiles may make the flow velocity at the runner twice faster than that of the traditional fixed type (OWC). The counter-rotating type wave power unit is composed of the tandem runners submerged in the seawater and the peculiar generator with double rotational armatures. The tandem runners counter-rotate in keeping each rotational direction constant, even at the oscillating flow, where the relative rotational speed is also twice faster than that in the single runner/armature type. It can be expected to make the runner size larger, namely the output higher because the torques are counter balanced in the unit and never act on the platform. At preliminary research, the single stage Wells type runner was boarded on the above platform, while the behavior of the platform and the performance of the power unit were investigated experimentally. The runner works fruitfully in response to the oscillating platform.

The backward bend duct buoy-an improved floating type wave power device

2003 ◽  
Author(s):  
Y. Masuda ◽  
T. Yamazaki ◽  
Y. Outa ◽  
M.E. McCormick
Keyword(s):  
Power Device ◽  
Wave Power ◽  
Type Wave ◽  
Floating Type

The Open Sea Tests of the Offshore Floating Type Wave Power Device “Mighty Whale”: Performance of the Prototype

2002 ◽  
Author(s):  
Teruhisa Ogata ◽  
Yukihisa Washio ◽  
Hiroyuki Osawa ◽  
Yasushi Tsuritani ◽  
Seiya Yamashita ◽  
...  
Keyword(s):  
Wave Height ◽  
Wave Energy ◽  
Wave Period ◽  
Power Device ◽  
Design Stage ◽  
Wave Power ◽  
Significant Wave ◽  
Type Wave ◽  
Open Sea ◽  
Floating Type

This paper presents the characteristics of wave conditions, wave energy absorption, response of hull-motion and wave height dissipation based on the results of the open sea tests. 0.5–1.0m of significant wave height and 6–7 seconds of significant wave period appear the most predominant, and average wave energy is estimated 4.88kW/m around the test site. Average power output for the test is approximately 6kWh and the maximum total energy efficiency is around 15% that is ranging from 6–7 seconds of significant wave period. Slow drift oscillation of hull was observed motion in surge, sway and yaw and the value of its amplitude almost equal to estimated values in design stage. Then the mean value of transmission coefficient is about 0.8 under 8.0 seconds of significant wave period. We are considering that the results of the tests should be useful for optimum design of an offshore floating type wave power device.

scholarly journals Wave-PV Hybrid Generation System of the Offshore Floating Type Wave Power Device “Mighty Whale”

2003 ◽  
Vol 2003 (194) ◽  
pp. 247-254
Author(s):  
Hiroyuki Osawa ◽  
Tsuyoshi Miyazaki ◽  
Teruhisa Ogata ◽  
Takayuki Takeuchi ◽  
Shuzo Okayama
Keyword(s):  
Power Device ◽  
Wave Power ◽  
Generation System ◽  
Hybrid Generation ◽  
Type Wave ◽  
Floating Type
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