|
Power To Gas
Power-to-gas (often abbreviated P2G) is a technology that uses electric power to produce a gaseous fuel. When using surplus power from wind generation, the concept is sometimes called windgas. Most P2G systems use electrolysis to produce hydrogen. The hydrogen can be used directly, or further steps (known as two-stage P2G systems) may convert the hydrogen into syngas, methane, or LPG. Single-stage P2G systems to produce methane also exist, such as reversible solid oxide cell (rSOC) technology. The gas may be used as chemical feedstock, or converted back into electricity using conventional generators such as gas turbines. Power-to-gas allows energy from electricity to be stored and transported in the form of compressed gas, often using existing infrastructure for long-term transport and storage of natural gas. P2G is often considered the most promising technology for seasonal renewable energy storage. Energy storage and transport Power-to-gas systems may be deployed as adjunct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siemens
Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', ''Energy'', ''Healthcare'' (Siemens Healthineers), and ''Infrastructure & Cities'', which represent the main activities of the corporation. The corporation is a prominent maker of medical diagnostics equipment and its medical health-care division, which generates about 12 percent of the corporation's total sales, is its second-most profitable unit, after the industrial automation division. In this area, it is regarded as a pioneer and the company with the highest revenue in the world. The corporation is a component of the Euro Stoxx 50 stock market index. Siemens and its subsidiaries employ approximately 303,000 people worldwide and reported global revenue of around €62 billion in 2021 according to its earnings release. History 1847 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrolysis Of Water
Electrolysis of water, also known as electrochemical water splitting, is the process of using electricity to decompose water into oxygen and hydrogen gas by electrolysis. Hydrogen gas released in this way can be used as hydrogen fuel, or remixed with the oxygen to create oxyhydrogen gas, which is used in welding and other applications. Electrolysis of water requires a minimum potential difference of 1.23 volts, though at that voltage external heat is required. E lectrolysis is rarely used in industrial applications since hydrogen can be produced less expensively from fossil fuels. History In 1789, Jan Rudolph Deiman and Adriaan Paets van Troostwijk used an electrostatic machine to make electricity that was discharged on gold electrodes in a Leyden jar with water. In 1800 Alessandro Volta invented the voltaic pile, and a few weeks later English scientists William Nicholson and Anthony Carlisle used it to electrolyse water. In 1806 Humphry Davy reported the results of ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy Conversion Efficiency
Energy conversion efficiency (''η'') is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, ''η'' (eta), ranges between 0 and 1. Overview Energy conversion efficiency depends on the usefulness of the output. All or part of the heat produced from burning a fuel may become rejected waste heat if, for example, work is the desired output from a thermodynamic cycle. Energy converter is an example of an energy transformation. For example, a light bulb falls into the categories energy converter. \eta = \frac Even though the definition includes the notion of usefulness, efficiency is considered a technical or physical term. Goal or mission oriented terms include effectiveness and efficacy. Generally, energy conversion efficiency is a dimensionless number between 0 and 1.0, or 0% to 100%. Ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy (journal)
''Energy'' is a peer-reviewed academic journal covering research on energy engineering that was established in 1976. It is published by Elsevier (formerly Pergamon Press) and the editor-in-chief is Henrik Lund (Aalborg University). According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 7.147, ranking it 9th out of 112 journals in the category "Energy & Fuels" and second out of 55 journals in "Thermodynamics". References External links * {{Official website, http://www.journals.elsevier.com/energy Elsevier academic journals Publications established in 1976 English-language journals Energy and fuel journals Monthly journals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy And Environmental Science
''Energy & Environmental Science'' is a monthly peer-reviewed scientific journal publishing original (primary) research and review articles. The journal covers work of an interdisciplinary nature in the biochemical and biophysical sciences and chemical and mechanical engineering disciplines. It covers energy area. ''Energy & Environmental Science'' is published by the Royal Society of Chemistry and the editor-in-chief is Joseph Hupp (Northwestern University, USA). According to the ''Journal Citation Reports'', the journal has a 2017 impact factor of 30.067, ranking it 4th out of 163 journals in the category "Chemistry, Multidisciplinary", first out of 88 journals in the category "Energy & Fuels", first out of 135 journals in the category "Engineering, Chemical", and first among 225 journals in the category "Environmental Sciences". Article types ''Energy & Environmental Science'' publishes the following types of articles: Research Papers (original scientific work); Review Article ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volker Quaschning
Volker Quaschning (born 1969) is a German engineer and professor of renewable energy systems at the Hochschule für Technik und Wirtschaft Berlin, Germany. Life Quaschning studied electrical engineering at Karlsruhe Institute of Technology, then wrote his PhD on photovoltaics at the Technische Universität Berlin. After obtaining his habilitation on low-carbon power system scenarios for Germany, he worked for the German Aerospace Center in Almeria, Spain and lead research into concentrated solar power. In 2004, Quaschning was appointed professor of renewable energy systems at the Hochschule für Technik und Wirtschaft Berlin. Quaschning is the author of several books, including the scientific textbook ''Regenerative Energiesysteme'' (Renewable energy systems), first published in 1998. In 2015, the ninth edition of this book was released. The book has been translated in English, Arabian and Russian and a translation to the Kazakh language is in progress. According to Panos K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battery Storage
A battery storage power station is a type of energy storage power station that uses a group of batteries to store electrical energy. Battery storage is the fastest responding dispatchable source of power on electric grids, and it is used to stabilise those grids, as battery storage can transition from standby to full power within milliseconds to deal with grid failures. At full rated power, battery storage power stations are generally designed to output for up to a few hours. Battery storage can be used for short-term peak power and ancillary services, such as providing operating reserve and frequency control to minimize the chance of power outages. They are often installed at, or close to, other active or disused power stations and may share the same grid connection to reduce costs. Since battery storage plants require no deliveries of fuel, are compact compared to generating stations and have no chimneys or large cooling systems, they can be rapidly installed and placed if ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pumped Hydro
Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. The method stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation. Low-cost surplus off-peak electric power is typically used to run the pumps. During periods of high electrical demand, the stored water is released through turbines to produce electric power. Although the losses of the pumping process make the plant a net consumer of energy overall, the system increases revenue by selling more electricity during periods of peak demand, when electricity prices are highest. If the upper lake collects significant rainfall or is fed by a river then the plant may be a net energy producer in the manner of a traditional hydroelectric plant. Pumped-storage hydroelectricity allows energy from intermittent sources (such as solar, wind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cogeneration
Cogeneration or combined heat and power (CHP) is the use of a heat engine or power station to generate electricity and useful heat at the same time. Cogeneration is a more efficient use of fuel or heat, because otherwise- wasted heat from electricity generation is put to some productive use. Combined heat and power (CHP) plants recover otherwise wasted thermal energy for heating. This is also called combined heat and power district heating. Small CHP plants are an example of decentralized energy. By-product heat at moderate temperatures (100–180 °C, 212–356 °F) can also be used in absorption refrigerators for cooling. The supply of high-temperature heat first drives a gas or steam turbine-powered generator. The resulting low-temperature waste heat is then used for water or space heating. At smaller scales (typically below 1 MW), a gas engine or diesel engine may be used. Cogeneration is also common with geothermal power plants as they often produce relatively lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Round-trip Efficiency
Round trip may refer to: Science and technology *Round-trip delay time, in communications *Round-trip engineering, automatic synchronization of related software development artifacts *Round-trip format conversion, in document conversion *Round-trip gain, in laser physics * Round-trip translation of text, using machine translation Media Films * ''Roundtrip'' (film), a 2004 comedy film Music * ''Round Trip'' (Phil Woods album), a 1969 album by Phil Woods * ''Round Trip'' (Sadao Watanabe album), a 1974 album by Sadao Watanabe * ''Round Trip'' (The Knack album), a 1981 album by The Knack * ''Round Trip'' (Ralph Moore album), a 1987 album by jazz saxophonist Ralph Moore * ''Round Trip'' (The Gap Band album), a 1989 album by The Gap Band *''Roundtrip'', a 2007 album by Kirk Whalum * ''Round Trip'' (Tony Harnell album), a 2010 album by Tony Harnell Other uses *Round-tripping (finance) Round-tripping, also known as round-trip transactions or "Lazy Susans", is defined by ''The Wall Stree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HCNG
HCNG or H2CNG (hydrogen compressed natural gas) is a mixture of compressed natural gas and 4–9 percent hydrogen by energy. It may be used as a fuel gas for internal combustion engines and home appliances. (regarding the acronyms in the above emissions chart: AVL = Average Levels? CNG = Compressed Natural Gas HCNG = Hydrogen and CNG blend NOX = Nitrogen Oxides NMHC = Non-Methane Hydrocarbons? CH4 = Methane THC = Total Hydrocarbons? CO = Carbon Monoxide) HCNG dispensers can be found at Hynor (Norway) Thousand palms and Barstow, California, Fort Collins, Colorado (all US), Chongqing and Shanxi (China), Pico Truncado (Argentina), Islamabad (Pakistan), Dunkerque (France), Gothenburg Sweden, Rio de Janeiro (Brazil), Emilia-Romagna, Lombardia (Italy), Dwarka and Faridabad (Delhi), India and the BC hydrogen highway in Canada. HCNG for mobile use is premixed at the hydrogen station. Research In the town of Nes on the island of Ameland in the Netherlands, a four-year (2008-2011) fie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
