Blog page 410




                                               

Lolland Hydrogen Community

Denmarks first full-scale wind-Hydrogen energy plant and testing facility, the Lolland Hydrogen Community, began operation in May 2007. It is also the European Unions first full-scale Hydrogen Community Demonstration facility for residential Fuel ...

                                               

Luminescent solar concentrator

A luminescent solar concentrator is a device for concentrating radiation, solar radiation in particular, to produce electricity. Luminescent solar concentrators operate on the principle of collecting radiation over a large area, converting it by ...

                                               

Magnetohydrodynamic converter

A magnetohydrodynamic converter is an electromagnetic machine with no moving parts involving magnetohydrodynamics, the study of the kinetics of electrically conductive fluids in the presence of electromagnetic fields. Such converters act on the f ...

                                               

Magnetohydrodynamic generator

A magnetohydrodynamic generator is a magnetohydrodynamic converter that utilizes a Brayton cycle to transform thermal energy and kinetic energy directly into electricity. MHD generators are different from traditional electric generators in that t ...

                                               

Mist lift

The Mist lift, Mist flow or Steam lift pump is a gas lift technique of lifting water used in a form of Ocean Thermal Energy Conversion where water falls to operate a hydro-electric turbine. The water is pumped from the level it drops to using ris ...

                                               

Multi-junction solar cell

Multi-junction solar cells are solar cells with multiple p–n junctions made of different semiconductor materials. Each materials p-n junction will produce electric current in response to different wavelengths of light. The use of multiple semicon ...

                                               

Nameplate capacity

Nameplate capacity, also known as the rated capacity, nominal capacity, installed capacity, or maximum effect, is the intended full-load sustained output of a facility such as a power plant, electric generator, a chemical plant, fuel plant, metal ...

                                               

Nanoionic supercapacitor

Nanoionic supercapacitors belong to new class of nanoionic devices, i.e. devices operating due to fast ion transport at nano-scale. An example of such a device is a nanoionic switch with quantum conductance. All solid state micrometre sized super ...

                                               

Nuclear fusion

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles. The difference in mass between the reactants and products is manifested as either the release or abs ...

                                               

Nuclear power

Nuclear power is the use of nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. Nuclear power can be obtained from nuclear fission, ...

                                               

List of companies in the nuclear sector

This is a list of large companies in the nuclear power industry that are active along the nuclear chain, from uranium mining, processing and enrichment, to the actual operating of nuclear power plant and nuclear waste processing. There are many o ...

                                               

Nuclear reactor

A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a self-sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. ...

                                               

Ocean Power Technologies

Ocean Power Technologies is a U.S. publicly owned renewable energy company, providing electric power and communications solutions, services and related for remote offshore applications. The companys PowerBuoy wave energy conversion technology is ...

                                               

Ocean Power Technologies Australasia

Ocean Power Technologies Australasia Pty Ltd is an Australian company, a subsidiary of Ocean Power Technologies Inc of the United States, a renewable energy company, providing power generation devices, services and related equipment for the extra ...

                                               

Ocean thermal energy conversion

Ocean thermal energy conversion uses the ocean thermal gradient between cooler deep and warmer shallow or surface seawaters to run a heat engine and produce useful work, usually in the form of electricity. OTEC can operate with a very high capaci ...

                                               

Oil burner (engine)

An oil burner engine is a steam engine that uses oil as its fuel. The term is usually applied to a locomotive or ship engine that burns oil to heat water, to produce the steam which drives the pistons, or turbines, from which the power is derived ...

                                               

Osmotic power

Osmotic power, salinity gradient power or blue energy is the energy available from the difference in the salt concentration between seawater and river water. Two practical methods for this are reverse electrodialysis and pressure retarded osmosis ...

                                               

Passive nuclear safety

Passive nuclear safety is a design approach for safety features, implemented in a nuclear reactor, that does not require any active intervention on the part of the operator or electrical/electronic feedback in order to bring the reactor to a safe ...

                                               

Photoelectric effect

The photoelectric effect is the emission of electrons or other free carriers when electromagnetic radiation, like light, hits a material. Electrons emitted in this manner can be called photoelectrons. This phenomenon is commonly studied in electr ...

                                               

Photoelectrochemical cell

A photoelectrochemical cell is one of two distinct classes of device. The first produces electrical energy similarly to a dye-sensitized photovoltaic cell, which meets the standard definition of a photovoltaic cell. The second is a photoelectroly ...

                                               

Photomagnetic effect

The magnetic effect is a theoretical quantum mechanical effect discovered by the researchers Samuel L. Oliveira and Stephen C. Rand at University of Michigan 2007–2011. The researchers have discovered a powerful magnetic interaction between the p ...

                                               

Photon-intermediate direct energy conversion

Photon-intermediate direct energy conversion is a scheme for direct conversion of nuclear power to electricity. PIDEC process is somewhat similar to a concept of fluorescent light - as in the CFL, in the nuclear reactor the original type of energ ...

                                               

Photovoltaic effect

The photovoltaic effect is the generation of voltage and electric current in a material upon exposure to light. It is a physical and chemical phenomenon. The photovoltaic effect is closely related to the photoelectric effect. In either case, ligh ...

                                               

Piezoelectric speaker

A piezoelectric speaker is a loudspeaker that uses the piezoelectric effect for generating sound. The initial mechanical motion is created by applying a voltage to a piezoelectric material, and this motion is typically converted into audible soun ...

                                               

Piezoelectricity

Piezoelectricity is the electric charge that accumulates in certain solid materials in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived from the Greek word π ...

                                               

Power loss factor

The power loss factor β describes the loss of electrical power in CHP systems with a variable power-to-heat ratio when an increasing heat flow is extracted from the main thermodynamic electricity generating process in order to provide useful heat ...

                                               

Pressure-retarded osmosis

Pressure retarded osmosis is a technique to separate a solvent from a solution that is more concentrated and also pressurized. A semipermeable membrane allows the solvent to pass to the concentrated solution side by osmosis. The technique can be ...

                                               

Pressure–volume diagram

A pressure–volume diagram is used to describe corresponding changes in volume and pressure in a system. They are commonly used in thermodynamics, cardiovascular physiology, and respiratory physiology. PV diagrams, originally called indicator diag ...

                                               

Pulverized coal-fired boiler

A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal that is blown into the firebox. The basic idea of a firing system using pulverised fuel is to use the whole volume of the f ...

                                               

Pyroelectricity

Pyroelectricity is a property of certain crystals which are naturally electrically polarized and as a result contain large electric fields. Pyroelectricity can be described as the ability of certain materials to generate a temporary voltage when ...

                                               

Recycling

Recycling is the process of converting waste materials into new materials and objects. It is an alternative to "conventional" waste disposal that can save material and help lower greenhouse gas emissions. Recycling can prevent the waste of potent ...

                                               

Respiratory quotient

The respiratory quotient, is a dimensionless number used in calculations of basal metabolic rate when estimated from carbon dioxide production. It is calculated from the ratio of carbon dioxide produced by the body to oxygen consumed by the body. ...

                                               

Reversed electrodialysis

Reverse electrodialysis is the salinity gradient energy retrieved from the difference in the salt concentration between seawater and river water. A method of utilizing the energy produced by this process by means of a heat engine was invented by ...

                                               

Shockley–Queisser limit

In physics, the Shockley–Queisser limit refers to the maximum theoretical efficiency of a solar cell using a single p-n junction to collect power from the cell where the only loss mechanism is radiative recombination in the solar cell. It was fir ...

                                               

Soil salinity

Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization. Salts occur naturally within soils and water. Salination can be caused by natural processes such as mineral weathering or by the g ...

                                               

Solar cell

A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a devi ...

                                               

Solar cell fabric

Solar cell fabric is a fabric with embedded photovoltaic cells which generate electricity when exposed to light. Traditional silicon based solar cells are expensive to manufacture, rigid and fragile. Although less efficient, thin-film cells and o ...

                                               

Solar cell research

There are currently many research groups active in the field of photovoltaics in universities and research institutions around the world. This research can be categorized into three areas: making current technology solar cells cheaper and/or more ...

                                               

Solar energy

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthes ...

                                               

Solar power

Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics, indirectly using concentrated solar power, or a combination. Concentrated solar power systems use lenses or mirrors and solar tracking sy ...

                                               

Solar power tower

The solar power tower, also known as central tower power plants or heliostat power plants or power towers, is a type of solar furnace using a tower to receive the focused sunlight. It uses an array of flat, movable mirrors to focus the suns rays ...

                                               

Solar thermal energy

Solar thermal energy is a form of energy and a technology for harnessing solar energy to generate thermal energy or electrical energy for use in industry, and in the residential and commercial sectors.

                                               

The Big Dish (solar thermal)

The Big Dish is a parabolic dish concentrator developed by the Australian National Universitys Solar Thermal Group. The initial prototype, SG3, was constructed on the Canberra campus of the Australian National University in 1994. A modified versi ...

                                               

Solar updraft tower

The solar updraft tower is a design concept for a renewable-energy power plant for generating electricity from low temperature solar heat. Sunshine heats the air beneath a very wide greenhouse-like roofed collector structure surrounding the centr ...

                                               

Solar-assisted heat pump

A solar-assisted heat pump is a machine that represents the integration of a heat pump and thermal solar panels in a single integrated system. Typically these two technologies are used separately to produce hot water. In this system the solar the ...

                                               

Space-based solar power

Space-based solar power is the concept of collecting solar power in outer space and distributing it to Earth. Potential advantages of collecting solar energy in space include a higher collection rate and a longer collection period due to the lack ...

                                               

Static synchronous compensator

A static synchronous compensator, also known as a static synchronous condenser, is a regulating device used on alternating current electricity transmission networks. It is based on a power electronics voltage-source converter and can act as eithe ...

                                               

Steam-electric power station

The steam-electric power station is a power station in which the electric generator is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam ...

                                               

Suntory Mermaid II

Suntory Mermaid II is a 9.5-metre, 3-tonne catamaran driven by wave power. It features two fin tails which absorb wave energy and generate thrust by moving up and down with the motion of the boat. The ship was designed by Hiroshi Terao of Tokai U ...

                                               

Surface condenser

A surface condenser is a commonly used term for a water-cooled shell and tube heat exchanger installed to condense exhaust steam from a steam turbine in thermal power stations. These condensers are heat exchangers which convert steam from its gas ...