Numerical study of plasma-fluid behavior and generation characteristics of the closed-loop MHD electrical power generator

2010 ◽  
Vol 174 (4) ◽  
pp. 37-44 ◽  
Author(s):  
Jun Ohno ◽  
Alessandro Liberati ◽  
Tomoyuki Murakami ◽  
Yoshihiro Okuno
Keyword(s):  
Closed Loop ◽  
Numerical Study ◽  
Electrical Power ◽  
Power Generator ◽  
Fluid Behavior

Numerical Study of Plasma-Fluid Behavior and Generation Characteristics of the Closed Loop MHD Electrical Power Generator

2008 ◽  
Vol 128 (11) ◽  
pp. 1401-1406
Author(s):  
Jun Ohno ◽  
Alessandro Liberati ◽  
Tomoyuki Murakami ◽  
Yoshihiro Okuno
Keyword(s):  
Closed Loop ◽  
Numerical Study ◽  
Electrical Power ◽  
Power Generator ◽  
Fluid Behavior

scholarly journals A Study of the Closed-Loop Supply Chain Coordination on Waste Glass Bottles Recycling

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Wenxue Ran ◽  
Fan Chen ◽  
Qianni Wu ◽  
Sen Liu
Keyword(s):  
Supply Chain ◽  
Closed Loop ◽  
Numerical Study ◽  
Supply And Demand ◽  
Waste Glass ◽  
Manufacturing Cost ◽  
Single Node ◽  
Closed Loop Supply Chain ◽  
Waste Products ◽  
Glass Bottles

The recycling of waste products can sharply save manufacturing cost and improve the economic efficiency and corporate-reputation. It also has a great effect on the environment and resources protection. In the management of the closed-loop supply chain, the recycling of waste products and decision-making on pricing often directly affect the supply and demand of products and the operation efficiency of supply chain. Therefore, first we take waste glass bottles as an example and establish a mathematical model to solve the profit of manufacturers and retailers solely. Then, we analyzed whole supply chain profit under a dual-channel recycling condition which is directly recycled by consumers or by retailers. Finally, we concluded that no matter what product’s price, quality, profit, or operational efficiency of supply chain is, the overall recycling is better than the single node recycling model. Based on the analysis, we developed a new model to coordinate the profit of manufacturers and retailers in the supply chain with revenue-sharing contract. A numerical study shows that this approach is applicable and effective.

Hydrocarbon-Fueled Electrical Power Generator with no Moving Parts

2019 ◽  
Author(s):  
Jakrapop Wongwiwat ◽  
Patharapong Bhuripanyo ◽  
Paul Ronney
Keyword(s):  
Electrical Power ◽  
Power Generator ◽  
Moving Parts

scholarly journals Simulation Models of Skidder Conventional and Hybrid Drive

Forests ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 921
Author(s):  
Juraj Karlušić ◽  
Mihael Cipek ◽  
Danijel Pavković ◽  
Juraj Benić ◽  
Željko Šitum ◽  
...  
Keyword(s):  
Storage System ◽  
Electrical Power ◽  
Simulation Models ◽  
Energy Storage System ◽  
Management Control ◽  
Operating Conditions ◽  
Hybrid Drive ◽  
Power Generator ◽  
Working Cycle ◽  
Battery Energy

The paper presents a hypothetical conversion of a conventional cable skidder powertrain to its hybrid version. Simulations of skidder operation were made for two existing forest paths, based on the technical characteristics of the engine, transmission system and the characteristics of the winch. Fuel and time consumption were calculated per working cycle considering the operating conditions (slope, load mass). The model was then converted to a hybrid version by adding a battery energy storage system in parallel with the electrical power generator and by employing an energy management control strategy. The dimensions of the battery and the power generator were chosen based on the characteristics of the existing winch with the aim of completely taking over its operation. The management strategy was selected using the specific fuel consumption map. All simulations were repeated for the hybrid drive under the same operating conditions. The results show that fuel savings of around 13% can be achieved with the selected hybrid drive and steering strategy.

Fundamental Study on Friction-Driven Gyroscopic Power Generator Works Under Arbitrary Vibration

2019 ◽  
Author(s):  
Aya Watanabe ◽  
Ryousuke Yuyama ◽  
Hiroshi Hosaka ◽  
Akira Yamashita
Keyword(s):  
Power Generation ◽  
High Speed ◽  
Electrical Power ◽  
Low Frequency ◽  
Inertial Force ◽  
Fundamental Study ◽  
Power Generator ◽  
Energy Harvesters ◽  
Low Frequency Vibration ◽  
Circular Track

Abstract This paper describes a friction-driven gyro generator that works under arbitrary vibrations and generates more than 1 W of power. Vibrational generators are energy harvesters that convert environmental vibrations into electrical power via the inertial force of pendulums. In conventional generators that use simple vibration, the power is less than 10 mW for a wearable size because vibrations in the natural environment are as low as 1 Hz. Gyroscopic generators increase the inertial force by rotating a pendulum at high speed and creating a gyro effect. In this generator, a palm-size product that generates 0.1 W and weighs 280 g has already been commercialized, but this device operates only under a particular vibration that synchronizes rotor precession and stalls under random vibration. To solve this problem, in this research, two gimbals and a precession spring are introduced to support the rotor. We developed a prototype generator with straight tracks measuring 16 cm × 11 cm × 12 cm with a mass of 980 g. Under a vibration of 4 Hz and ±20 degrees, power generation of 1.6 W was confirmed. Next, a prototype circular track was made. Power generation of 0.2 W with a vibration of 1 Hz and ±90 degrees was confirmed. Finally, a simple formula to estimate the upper limit of the generation power is derived. It is suggested that the circular-type generator is suitable for low-frequency vibration and can generate twice the power of a straight-type generator.

scholarly journals Gurney Flap Implementation on a DU91W250 Airfoil

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1448 ◽  
Author(s):  
Iñigo Aramendia ◽  
Aitor Saenz-Aguirre ◽  
Unai Fernandez-Gamiz ◽  
Ekaitz Zulueta ◽  
Jose Manuel Lopez-Guede ◽  
...  
Keyword(s):  
Flow Control ◽  
Numerical Study ◽  
Lift Coefficient ◽  
Optimization Technique ◽  
Electrical Power ◽  
Aerodynamic Performance ◽  
Control Element ◽  
Mechanical Fatigue ◽  
Gurney Flap ◽  
Fatigue Loads

The increasing capability of Wind Turbine (WT) based power generation systems has derived in an increment of the WT rotor diameter, i.e., longer rotor blades. This results in an increase of the electrical power generated but also in instabilities in the operation of the WT, especially due to the mechanical fatigue loads generated in its elements. In this context, flow control has appeared as a solution to improve the aerodynamic performance of the blades. These devices not only increase lift coefficient but also reduce mechanical fatigue loads. This paper presents a detailed numerical analysis of the effects of placing a passive flow control element, a Gurney Flap (GF), in a DU91W250 airfoil. Moreover, a numerical study of the influence of the GF length on the aerodynamic performance of the blade has been carried out. This study is considered as a basis for the development of an optimization technique of the GF length for long WT blades.

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