Browse Topic: Hydroelectric power

Items (18)
Find
Study of Different Types of Ventilation and Cooling Systems of Bulb Hydrogenerators in a Three-Dimensional Setting05-18-03-00202/17/2025
The Object of research in the article is the ventilation and cooling system of bulb hydrogenerators. The Subject of study in the article is the design and efficiency of using the cooling system of various structural types for bulb hydro units. The Purpose of the work is to carry out a three-dimensional study of two cooling systems (axial and radial) of the bulb hydro unit of the Kanivskaya HPP with a rated 22 MW. Research Tasks include analysis of the main design solutions for effective cooling of bulb-type hydrogenerators, in particular, the use of radial, axial, and mixed cooling systems; formulation of the main assumptions for the three-dimensional ventilation and thermal calculation of the bulb hydrogenerator; carrying out a three-dimensional calculation for a hydrogenerator with axial ventilation; determining airflow speeds in the channels and temperatures of active parts of the hydrogenerator under the conditions of using discharge fans and without them; carrying out a three-dimensional calculation for a hydrogenerator with radial ventilation; determining airflow speeds in the channels and temperatures of the active parts of the hydrogenerator. As a result of the study, the main constructive solutions of cooling systems of bulb hydrogenerators were considered. On the basis of scientific developments, two main ventilation systems were formed and their functioning was considered on the example of the hydro unit of the Kanivska HPP. Using a three-dimensional study, a comparison of the efficiency of axial and radial ventilation systems was carried out. It was found that the forced axial system with two fans is the most optimal and reliable for removing heat from heat-generating elements, ensuring long-term operation and the necessary speeds in the cooling channels. This research makes a significant contribution to improving the efficiency of the cooling systems of bulb hydrogenerators, which is critical for their reliable and trouble-free operation.
Tretiak, Oleksii, Arefieva, Mariia, Makarov, Pavlo, Serhiienko, Serhii, Zhukov, Anton, Shulga, Iryna, Penkovska, Nataliia, Kravchenko, Stanislav, Kovryga, Anton
Hydropower Technology Swaps Dams with Electric TrucksTBMG-457195/1/2022
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.
Liquid Metal Turns Motion into Electricity, Even UnderwaterTBMG-4001310/1/2021
Mechanical energy — such as the kinetic energy of wind, waves, body movement, and vibrations from motors — is abundant. Researchers have created a device that can turn this type of mechanical motion into electricity. One of the device’s attributes is that it works well underwater.
Water-Powered Engines Offer Satellite MobilityTBMG-383521/1/2021
Spinoff is NASA’s annual publication featuring successfully commercialized NASA technology. This commercialization has contributed to the development of products and services in the fields of health and medicine, consumer goods, transportation, public safety, computer technology, and environmental resources.
Cutting the cost of carbon11AEID1101_0411/1/2011
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.
Carney, Dan
Create the Future Design Contest Winners: Where Are They Now?TBMG-94113/1/2011
The Create the Future Design Contest was launched in 2002 by the publishers of NASA Tech Briefs to help stimulate and reward engineering innovation. The competition has attracted more than 7,000 product design ideas that have the potential to change the way we live and work. As the 2011 contest opens for entries this month (enter at ), we caught up with a few past winners to learn now their inventions have advanced.
2010 Create the Future Design Contest Sustainable Technologies Category WinnerTBMG-880411/1/2010
(Winner of an HP Workstation)
Advancing Technologies Harness the Power of Wind, Water, and the SunTBMG-TB-0054517/6/2009
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.
Advancing Technologies Harness the Power of Wind, Water, and the SunTBMG-54647/1/2009
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.
Advancing Technologies Harness the Power of Wind, Water, and the SunTBMG-54517/1/2009
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.
NASA Energy Concept Could Harness the Power of Ocean WavesTBMG-54346/1/2009
NASA Jet Propulsion Laboratory (JPL) researchers who developed a new way to power robotic underwater vehicles believe a spin-off technology could help convert ocean energy into electrical energy on a much larger scale. The researchers hope that clean, renewable energy produced from the motion of the ocean and rivers could potentially meet an important part of the world’s demand for electricity.
30 Years of Power & EnergyTBMG-9029/1/2006
In celebration of the 30th Anniversary of NASA Tech Briefs, our features in 2006 highlight a different technology category each month, tracing the past 30 years of the technology, and continuing with a glimpse into the future of where the technology is headed. Along the way, we include insights from industry leaders on the past, present, and future of each technology. This month, we take a look at the past 30 years of Power & Energy Technology.
Hydrogen power for the massesAUTOJAN05_051/1/2005
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.
Yamaguchi, Jack
Modified Water Powered Greens King VI Mower2002-01-13823/19/2002
A mobile hydraulic system using water as the media was developed by the Agricultural & Biological Engineering Department at Purdue University. This system was specifically designed to operate on a Jacobson Greens King VI mower. Existing oil hydraulic components were replaced by current industrial water hydraulic components. Due to the lack of available water hydraulic components, the individual systems had to be re-engineered to perform correctly. Water power was used to power all circuits including; steering, propulsion, reel drives, and reel lifts. Testing has shown that the machine is fully functional and operates with desirable characteristics at approximately 3 mph. The authors would like to thank supporting companies Danfoss and Swagelok, undergraduate students Dan Pitstick, Dan Sellers, and Nate Schoonover, alumni Rich Munford from Fairfield Gear, Karl Hay from Parker Hannifin for providing needed components, and Joseph Oberlin of PHD hydraulics for donating the steering cylinder.
Cassens, Louis, Thomas, Michael, Krutz, Gary
Electric Motor Powered Brake Actuation System8404652/1/1984
With fuel shortages projected into the future and automotive industry trends continuing towards utilization of smaller gasoline, diesel, and turbocharged engines, many vehicle manufacturers recognize the desirability for eliminating vacuum powered and belt driven engine accessory attachments. A desirable goal becomes demand systems, which utilize or consume energy only when being operated, to replace many of the present day continuous running systems. As a building block for satisfying the above long term need, Bendix has developed a demand power brake system powered by a small electric motor. This paper will be directed primarily to the design and operating characteristics of this new power brake system that Bendix Automotive Control Systems Group of the Allied Corporation has named “Hydro-Electric Full Power”. The system is designed for use in most hydraulically actuated vehicle brake applications up to 4, 536.0 Kg (10,000 lbs.) GVW. The new system also simplifies integration of a hydraulic anti-skid system.
Brown, A.K., Wilson, R.K., Woodiwiss, K.A.
Itaipu Hydroelectric Project7604182/1/1976
Murphy, N. L.
The James Bay Hydro-Electric Development7604192/1/1976
The James Bay Hydro-electric Project, presently under construction in northern Québec, is one of the world's largest energy developments. Four major powerhouses are planned to produce 10,000 Mw. There are six reservoirs with 147 earth and rockfill dams containing 203.5 million yd3 of material and extending 60 miles in total length. Construction is over a 12-year period.
Seemel, Richard N., Bergevin, Gilles
PROMISING METHODS OF GENERATING ELECTRICITY6102231/1/1961
Between 1800 and 1958 the U.S. population multiplied 33-fold. In the same time the use of energy grew 69-fold, and the energy was used much more efficiently. The sources of energy changed also. In 1800 over 94% of U.S. energy came from burning wood. In 1900, coal was supplying 75% of our energy requirements. In 1958, oil and gas supplied over 70% of our energy. Most of our electricity is generated from steam-turbine power, with water power helping. Many methods of generating electricity are now under development. Some of these methods may loom large in the over-all energy picture, whereas others are primarily for highly-specialized uses, as in space travel. Methods of generating electricity covered include: Stirling engine Fuel cell Solar power Thermoelectricity Thermionic emission Magnetohydrodynamics
WINTRINGHAM, JOHN S.
Items per page:
1 – 18 of 18