Walking Catfish-Ikan Keli
Snakehead- Ikan Toman
Climbing Gourami- Ikan Puyu
Mudskipper- Ikan Belacak
more..http://webecoist.com/2010/11/23/fin-day-for-a-stroll-seven-amazing-walking-fish/
Tuesday, November 23, 2010
Fin Day For A Stroll: Seven Amazing Walking Fish
http://webecoist.com/2010/11/23/fin-day-for-a-stroll-seven-amazing-walking-fish/
20 Amazing Futuristic Hydrogen Vehicle Design Concepts
Ronn Motors Scorpion Roadster
Volkswagen Splinter
BlitzenBenz
Pholeum
and more...http://webecoist.com/2010/04/29/20-amazing-futuristic-hydrogen-vehicle-design-concepts/
Wave and Tidal Hydroelectric Plants
Generation of tidal energy
Tidal power is the only form of energy which derives directly from the relative motions of the Earth–Moon system, and to a lesser extent from the Earth–Sun system. Tidal forces produced by the Moon and Sun, in combination with Earth's rotation, are responsible for the generation of the tides. Other sources of energy originate directly or indirectly from the Sun, including fossil fuels, conventional hydroelectric, wind, biofuels, wave power and solar. Nuclear energy makes use of Earth's mineral deposits of fissionable elements, while geothermal power uses the Earth's internal heat which comes from a combination of residual heat from planetary accretion (about 20%) and heat produced through radioactive decay (80%).[3]
Tidal energy is extracted from the relative motion of large bodies of water. Periodic changes of water levels, and associated tidal currents, are due to the gravitational attraction of the Sun and Moon. Magnitude of the tide at a location is the result of the changing positions of the Moon and Sun relative to the Earth, the effects of Earth rotation, and the local geography of the sea floor and coastlines.
Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible and classified as a renewable energy resource.
A tidal generator uses this phenomenon to generate electricity. Greater tidal variation or tidal current velocities can dramatically increase the potential for tidal electricity generation.
The movement of the tides causes a continual loss of mechanical energy in the Earth–Moon system due to pumping of water through the natural restrictions around coastlines, and consequent viscous dissipation at the seabed and in turbulence. This loss of energy has caused the rotation of the Earth to slow in the 4.5 billion years since formation. During the last 620 million years the period of rotation has increased from 21.9 hours to the 24 hours[4] we see now; in this period the Earth has lost 17% of its rotational energy. While tidal power may take additional energy from the system, increasing the rate of slowdown, the effect would be noticeable over millions of years only, thus being negligible.
Generating methods
 The world's first commercial-scale and grid-connected tidal stream generator – SeaGen – in Strangford Lough.[5] The strong wake shows the power in the tidal current. |
Tidal power can be classified into three generating methods:
Tidal stream generator
Main article: Tidal stream generator
Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use moving air. This method is gaining in popularity because of the lower cost and lower ecological impact compared to tidal barrages.
Tidal barrage
Main article: Tidal barrage
Tidal barrages make use of the potential energy in the difference in height (or head) between high and low tides. Barrages are essentially dams across the full width of a tidal estuary, and suffer from very high civil infrastructure costs, a worldwide shortage of viable sites and environmental issues.
Dynamic tidal power
Main article: Dynamic tidal power
Dynamic tidal power (or DTP) exploits an interaction between potential and kinetic energies in tidal flows. It proposes that (for example: 30–50 km length) dams be built from coasts straight out into the sea or ocean, without enclosing an area. Tidal phase differences are introduced by the presence and dimensions of the dam, which is not negligible in size compared to the local tidal wavelength. This leads to hydraulic head differences across the dam. Turbines in the dam are used to convert power (6–15 GW per dam). In shallow coastal seas featuring strong coast-parallel oscillating tidal currents such as found in the UK, China and Korea, a significant water level differential (of at least 2–3 meters) would appear across the dam.
from..
http://en.wikipedia.org/wiki/Tidal_powerhttp://webecoist.com/2008/11/09/hydroelectric-wave-tidal-power/
Microturbines
Luxury Hotel Green Energy
Four Seasons Hotel first Philadelphia business to install energy-efficient microturbines. To gain control of energy costs and reduce greenhouse gas emissions, the luxurious Four Seasons Hotel Philadelphia installed three Capstone C65 ICHP MicroTurbines®. The natural gas microturbines are located on the roof of the five-star hotel. Within the first two months of operation, the hotel reduced its energy cost by more than US$80,000. The microturbines’ combined heat and power (CHP) technology allows the hotel to generate nearly 200kW of electric power, which fulfills 30% of the hotel’s overall electricity needs. Heat from the microturbines is used to heat water for laundry and other hotel operations. The energy-efficient CHP system provides 100% of the building’s day-to-day domestic hot water and satisfies 15% of its heating needs. The project is expected to reduce the hotel’s annual energy costs by 30%.
Microturbines..moreThe Power Plants Around the World
The Power Plants Around the World Photo Gallery is a collaborative project undertaken with electricity companies, individual power stations, equipment and service suppliers, photographers, and power plant enthusiasts.
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conventional steam-electric plants (coal and lignite),
conventional steam-electric plants (other fuels),
combined-cycle and gas turbine plants,
conventional hydroelectric plants,
pumped-storage hydroelectric plants,
nuclear power plants,
waste-to-energy plants,
biomass power plants,
diesel and gas-engine power plants,
wind energy plants,
geothermal power plants,
solar power plants,
other plants
Water Chemistry Industrial and Power Plant Water Treatment
Study of water and steam chemistry transcends the traditional barriers between chemistry, engineering and physics. On account of its multi-disciplinary nature, the study of water chemistry has become technologically significant. This book is an attempt to bring to the attention of academic and professional chemists, various facets of water chemistry.
It blends basic and applied knowledge in this field. The subject matter covered includes properties of water at elevated temperatures, the characteristics of natural and industrial cooling waters as well as purifications by ion exchange and reverse osmosis. Several chapters are devoted to water and steam chemistry in thermal and nuclear power stations and in the utilisation of geothermal energy. Effluent treatment and water conservation have been dealt with briefly to provide a better and comprehensive study of the subject.
About the Author(s):
Dr. K.S. Venkateswarlu
had his early education in Andhra Pradesh, India. He joined the Bhabha Atomic Research Centre, Trombay, Bombay in 1955. He obtained a D.Sc. degree in 1961 for his work on, Chemical Consequences of Nuclear Transformations. During his stay at the Argonne National Laboratory, USA, he worked on the chemistry of transplutonium elements and radiation damage in graphite. Later his research interests encompassed solvent extraction, ion exchange, metal complexes, super conductivity and cold fusion. A large number of students have taken their Ph. D. degrees under his supervision.
From 1970 onwards, Dr. Venkateswarlu was closely involved with the development of water chemistry in all its aspects. He established a Division of Water Chemistry in BARC with a specialised Water and Stream Chemistry Laboratory at Kalpakkam near Madras. He was Chairman of the Committee on Steam and Water Chemistry, Dept. of Atomic Energy, Govt. of India and was nominated to be the Chief Scientific Investigator of the Coordinated Research Programme on Water Chemistry in Nuclear Power Reactors conducted by the International Atomic Energy Agency. He was also the Expert Coordinator for the study on Water Chemistry in Thermal Power Stations carried out by the Central Board of Irrigation and Power, New Delhi. He has attended a number of national and international conferences in this field. Dr. Venkateswarlu is the author of over a 100 publications.
Contents:
Introduction
Physico
Chemical Characteristics of Natural Waters
Properties of Water at high Temperatures and Pressures
Water Chemistry, Material Compatibility and Corrosion
Treatment of Natural Waters for Industrial Cooling
Demineralisation by Ion Exchange
Water Chemistry in Fossil Fuel Fired Steam Generating Units
Steam Quality Requirements for High Pressure Turbines
Special Problems of Water Chemistry and Material Compatibility in Nuclear Power Stations
Geothermal Power and Water Chemistry
Analytical Techniques for Water Chemistry Monitoring and Control
Desalination, Effluent, Treatment and Water Conservation
Index.
The Top 100 - World's Largest Power Plants
The Power Plants Around the World Photo Gallery is a collaborative project undertaken with electricity companies, individual power stations, equipment and service suppliers, photographers, and power plant enthusiasts. Some operating costs are offset by purchases of Power Plant Trading Cards, paid or in-kind sponsorship by members of the electric power community, and Google ads. New photographs are always welcome!
Top 100 - Part l
Top 100 - Part II
Top 100 - Part III
Top 100 - Part IV
Top 100 - Part l
Top 100 - Part II
Top 100 - Part III
Top 100 - Part IV
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