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Renewable heat
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Renewable heat : ウィキペディア英語版
Renewable heat
Renewable heat is an application of renewable energy and it refers to the renewable generation of heat, rather than electrical power (e.g. replacing a fossil fuel boiler using concentrating solar thermal to feed radiators). Renewable heat technologies include renewable biofuels, solar heating, geothermal heating, heat pumps and heat exchangers to recover lost heat. Significant attention is also applied to insulation.
Many colder countries consume more energy for heating than electrical power. For example, in 2005 the United Kingdom consumed 354 TWh〔Department of Trade and Industry report (UK Energy in Brief July 2007, Page 25 ) (URL accessed May, 2008)〕 of electric power, but had a heat requirement of 907 TWh, the majority of which (81%) was met using gas. The residential sector alone consumed a massive 550 TWh of energy for heating, mainly in the form of gas. Almost half of the final energy consumed in the UK (49%) was in the form of heat, of which 70% was used by households and in commercial and public buildings. Households used heat for mainly for space heating (69%) and heating water.〔UK Government Call for Evidence on Heat, Office of Climate Change, Jan 2008 ('Heat Call for Evidence', Paragraphs 11 and 12 ) (URL accessed May, 2008)〕
The relative competitiveness of renewable electricity and renewable heat depends on a nation's approach to energy and environment policy. Few renewable technologies (whether for heat, electricity or transport) are competitive with fossil fuels without some form of carbon valuation or subsidy. In those countries, such as Sweden, Denmark and Finland, where government intervention has been closest to a technology-neutral form of carbon valuation (i.e. carbon and energy taxes), renewable heat has played the leading role in a very substantial renewable contribution to final energy consumption. In those countries, such as Germany, Spain, the USA, and the UK, where government intervention has been set at different levels for different technologies, uses and scales, the contributions of renewable heat and renewable electricity technologies have depended on the relative levels of support, and have resulted generally in a lower renewable contribution to final energy consumption.
== Leading renewable heat technologies ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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