Green hydrogen is a hydrogen-produced fuel obtained from electrolysis of water with electricity generated by low-carbon power sources. It is a clean fuel that, when consumed in a fuel cell, produces only water. It can be produced from a variety of domestic resources, such as natural gas, nuclear power, biomass, and renewable power like solar and wind. These qualities make it an attractive fuel option for transportation and electricity generation applications. It can be used in cars, in houses, for portable power, and in many more applications. Also, it is an energy carrier that can be used to...

Die Energiewende ist ein bedeutender Strukturwandel in einem Energiesystem. Historisch gesehen wurden diese Veränderungen durch die Nachfrage nach und die Verfügbarkeit von verschiedenen Brennstoffen angetrieben. Der aktuelle Übergang zu erneuerbaren Energien und vielleicht auch zu anderen Arten nachhaltiger Energie unterscheidet sich davon, da er größtenteils von der Erkenntnis angetrieben wird, dass die globalen Kohlenstoffemissionen auf Null gebracht werden müssen, und da fossile Brennstoffe die größte Einzelquelle für Kohlenstoffemissionen sind, müssen wir die Energiesysteme...

In the current leading technology, steam-methane reforming, for producing hydrogen in large quantities extracts hydrogen from methane. However, this reaction releases fossil carbon dioxide and carbon monoxide into the atmosphere which are greenhouse gases exogenous to the natural carbon cycle, and thus contribute to climate change. In electrolysis, electricity is run through water to separate the hydrogen and oxygen atoms. This method can use wind, solar, geothermal, hydro, fossil fuels, biomass, nuclear, and many other energy sources. Obtaining hydrogen from this process is being studied as...

Wave power is the capture of energy of wind waves to do useful work - for example, electricity generation, water desalination, or pumping water. A machine that exploits wave power is a wave energy converter (WEC). In this concern, wave power is distinct from tidal power, which captures the energy of the current caused by the gravitational pull of the sun and moon. Waves and tides are also distinct from ocean currents which are caused by other forces including breaking waves, wind, the Carioles effect, caballing, and differences in temperature and salinity. Wave-power generation is not a...

Energy harvesting (also known as power harvesting or energy scavenging or ambient power) is the process by which energy is derived from external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy, also known as ambient energy), captured, and stored for small, wireless autonomous devices, like those used in wearable electronics and wireless sensor networks. Energy harvesting is collecting small amounts of energy from the world around and converting it into a form that is usable by a device. By collecting ambient energy a device can operate much...

Altreifen sind eine Abfallkategorie, deren Entsorgung aufgrund ihrer sehr komplexen Struktur, der unterschiedlichen Zusammensetzung des Rohmaterials und der Qualität des Gummis problematisch sein kann. Der Gummi macht 70-80 % der Reifenmasse aus, während der Rest aus Stahlgürteln und Textilauflagen besteht, die beim Recycling vom Gummi getrennt werden müssen. Das Reifenrecycling basiert auf der mechanischen, thermischen oder chemischen Entfernung der Gummifraktion. Die Deponierung von Altreifen war in der Vergangenheit weit verbreitet und wird in einigen Ländern immer noch praktiziert....