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  2. Renewable heat - Wikipedia

    en.wikipedia.org/wiki/Renewable_heat

    Renewable heat is an application of renewable energy referring to the generation of heat from renewable sources; for example, feeding radiators with water warmed by focused solar radiation rather than by a fossil fuel boiler. Renewable heat technologies include renewable biofuels, solar heating, geothermal heating, heat pumps and heat ...

  3. Renewable thermal energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_thermal_energy

    Renewable thermal energy is the technology of gathering thermal energy from a renewable energy source for immediate use or for storage in a thermal battery for later use. The most popular form of renewable thermal energy is the sun and the solar energy is harvested by solar collectors to heat water, buildings, pools and various processes.

  4. 100% renewable energy - Wikipedia

    en.wikipedia.org/wiki/100%_renewable_energy

    100% renewable energy is an energy system where all energy use is sourced from renewable energy sources. The endeavor to use 100% renewable energy for electricity, heating/cooling and transport is motivated by global warming, pollution and other environmental issues, as well as economic and energy security concerns.

  5. 5 Alternative Energy Sources That Are Cheaper Than Solar

    www.aol.com/2013/07/19/alternative-energy...

    The co-inventor of PayPal, now turned alternative energy rock star, has built two companies -- solar power utility SolarCity (SCTY) and electric car company Tesla 5 Alternative Energy Sources That ...

  6. Renewable energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy

    Geothermal energy can be either used directly to heat homes, as is common in Iceland where almost all of its energy is renewable, or to generate electricity. At smaller scales, geothermal power can be generated with geothermal heat pumps , which can extract heat from ground temperatures of under 30 °C (86 °F), allowing them to be used at ...

  7. Bioenergy - Wikipedia

    en.wikipedia.org/wiki/Bioenergy

    The surface power production densities of a crop will determine how much land is required for production. The average lifecycle surface power densities for biomass, wind, hydro and solar power production are 0.30 W/m 2, 1 W/m 2, 3 W/m 2 and 5 W/m 2, respectively (power in the form of heat for biomass, and electricity for wind, hydro and solar ...

  8. Thermal energy storage - Wikipedia

    en.wikipedia.org/wiki/Thermal_energy_storage

    Other sources of thermal energy for storage include heat or cold produced with heat pumps from off-peak, lower cost electric power, a practice called peak shaving; heat from combined heat and power (CHP) power plants; heat produced by renewable electrical energy that exceeds grid demand and waste heat from industrial processes.

  9. Biomass briquettes - Wikipedia

    en.wikipedia.org/wiki/Biomass_briquettes

    This fuel source is used as an alternative for harmful biofuels. Briquettes are used for heating, cooking fuel, and electricity generation usually in developing countries that do not have access to more modern fuel sources. Biomass briquettes have become popular in developed countries due to the accessibility, and eco-friendly impact.

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