Browse Topic: Hydroelectric power
At present, most of the aerial-aquatic rotorcraft use two power systems, or a set of air power equipment to complete the air and underwater motion. It consumes a lot of energy to drive the vehicle to move in the water by the power device. For the system that needs to move in the water, such as the aerial-aquatic rotorcraft, its endurance is limited. How to reduce the energy consumption of underwater movement and enhance its endurance is the current difficulty and pain point. Aiming at this problem, a new solution is proposed in this design. The aircraft combines the design concept of helicopter rotor and underwater glider, adding the characteristics of underwater glider that can travel long time and long distance into the interchangeable aircraft, and cleverly realizes the conversion of helicopter rotor and underwater glider wing through the pitch variable mechanism. At the same time, it is equipped with a novel lightweight buoyancy and center of gravity adjustment system, so that the aircraft can not only realize the cross-medium movement like the aerial-aquatic rotorcraft, but also realize the lift by adjusting the buoyancy like the underwater glider, and realize the movement by using the water power. In this paper, the rotor/wing interchange mechanism is mainly designed, and the feasibility of the mechanism is verified by the three-dimensional model of the aircraft. The underwater kinematics and dynamics model of the aerial-aquatic rotorcraft is established, and the underwater glide balance model of the vehicle is further established based on this, and the glide balance process in two motion cycles is analyzed.
In steep mountain regions, the potential for generating electricity from a small stream of water is high, however, the hydropower potential of these regions remains untapped as it requires storage reservoirs, which have environmental and social impacts. International Institute for Applied Systems Analysis (IIASA) researcher Julian Hunt and an international team of researchers developed a new technology called Electric Truck Hydropower that could become a key method for electricity generation in steep mountainous regions. The results of the study have been published in the Energy Journal.
Automakers streamline production to reduce the price premium for lightweight carbon fiber. The 2011 Frankfurt Motor Show was a virtual carbon fiber industry expo, as automakers rolled out numerous concepts heavily featuring carbon-fiber-reinforced plastic (CFRP) components. The appearance of carbon fiber in supercars such as the Lamborghini Aventador or McLaren MP4-12C is no surprise, but automakers are increasingly aiming to exploit the lightweight material's advantages in small fuel-saving models.
Renewable energy will be the world’s fastest-growing source of electricity generation over the next two decades, although it will still make up a relatively minor portion of the global energy supply, according to the Energy Information Administration. The majority of that increase will come from the use of wind power and water power, or hydropower. The Obama Administration advocates a policy that would require 25% of United States electricity demand be met by renewable energy by 2025.
Japanese companies continue to invest in development of fuel-cell vehicles and hydrogen production capability. Carlos Ghosn, President and CEO of Nissan, is forceful, forthright, and pragmatic. These characteristics helped him to jump-start a faltering Nissan, putting it on a firmer ground and getting it accelerating harder to a prosperous and profitable future. Nissan's technological resources, now rapidly being strengthened, are largely directed to “real, specific, technological innovation in the car that you see on a showroom floor,” asserts Ghosn.
The Hydro-Electric Power Commission of Ontario, Canada, originated as a co-operative enterprise of the Municipalities of Ontario in the public utility field. It was created by special acts of the Ontario Legislature in 1906-07 and given certain rights for the development, generation and distribution of electrical energy within the Province. Its growth has been prodigious until, today, with expansion still going on, total generation amounts to approximately 4,000,000 Horse Power of electrical energy, and capital investment is over $1,000,000,000.00. Ontario is blessed with extensive water power resources and, therefore, our generation of electricity is predominantly from hydraulic sources. The geographical layout of the Province is such that the load centres are distant from generation, resulting in many miles of long distance High Voltage transmission lines. In many cases, these circuits pass over rough and isolated country and it is not unusual to have 300 miles intervening between the source of power and the centre of distribution.
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