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Zhu W.Q.,Northeast Normal University | Zhu W.Q.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | Wu B.G.,Northeast Normal University | Wu B.G.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | And 4 more authors.
Advanced Materials Research | Year: 2014

At present, with the gradual development of marine technology, application of marine monitoring instruments is becoming increasingly wide, for which there are more and more types of such instruments, and an increasing amount of electric energy is thus consumed. Continuous working period of such instruments and the further extension of their functions are obviously restricted by the link of electric energy supplement. Tidal current energy is a renewable energy in abundant reserve. In this paper, an electric energy supplementing device for drag-type marine monitoring instruments based on electricity generation with tidal current is designed, and its good functions are proved through water tank experiment, for which it can provide energy supplement to marine monitoring instruments. © (2014) Trans Tech Publications, Switzerland. Source


Zhu W.Q.,Northeast Normal University | Zhu W.Q.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | Wu B.G.,Northeast Normal University | Wu B.G.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | And 6 more authors.
Advanced Materials Research | Year: 2014

Tidal current energy of sea surface is a kind of renewable energy with wide prospect of development. Because of its relatively high utilization ratio, the horizontal-axis turbine generation system utilizing tidal current energy has become the focus of technology development of tidal current energy all over the world. In this paper, the authors analyze the characteristics of surface tidal current energy along the coast of China. Meanwhile, we use BEM mathematical model to design the 2.5kW Horizontal Axis Tidal Current Energy Turbine Generator Blade, which is suitable for the features of tidal current energy in our country. The result of the prototype's dragging experiment indicates that this design method has good application value. © (2014) Trans Tech Publications, Switzerland. Source


Wu B.,Northeast Normal University | Wu B.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | Zhang X.,Northeast Normal University | Zhang X.,JiLin Provincial Key Laboratory of Advanced Energy Development and Application Innovation | And 8 more authors.
Energy | Year: 2013

The tidal stream turbine is the major device we use to obtain the kinetic energy of tides. The blades of the rotor are one of the essential parts which can convert tidal current energy into mechanical energy. Now most horizontal-axis turbine blade design theories are mostly based on the BEM (blade element momentum) theory and Glauert theory (e.g., WTperf, GHbladed). This paper comes up with a new method - Schmitz design. This method is easier, but they have the same physical philosophy. Also we change the chord length distribution to adapt the low stream velocity. This new hydrofoil increases the startup torque, improves the total performance of the turbine and decreases the thrust coefficient. At the same time we consider the incipient cavitations, tip loss and airfoil loss. We compare the design results with the experimental data in the literature. This method can satisfy the requirement of the design. © 2013 Elsevier Ltd. Source

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