Electric heating

Electric heating uses relatively inexpensive tools to directly convert electrical energy into heat energy with a conversion efficiency of roughly 100%. Applications that are frequently used include industrial processes, cooking, water heating, and space heating. An electrical appliance that transforms an electric current into heat is called an electric heater. Every electric heater contains a heating element that is an electrical resistor and operates on the principle of Joule heating. When an electric current flows through a resistor, the electrical energy is transformed into heat energy. The active element in most contemporary electric heaters is nichrome wire; the heating element shown on the right is nichrome wire supported by ceramic insulators.

As an alternative, a heat pump, which uses electricity exclusively to transfer the thermal energy from the environment, primarily air, can achieve a heating efficiency of about 300%, or 3.0 Coefficient of Performance. The refrigeration cycle of the heat pump is powered by an electric motor, which pulls heat energy from the earth, outside air, or even the inside of a refrigerator, and transfers it to the area that needs to be warmed (in case of a fridge, the kitchen). This uses electricity considerably more efficiently than direct electric heating, but it also necessitates pipes and much more expensive equipment. For air conditioning, certain heating systems can be turned backwards, cooling the interior while venting much hotter air or water outside or into the earth.

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Wood energy

Wood is considered humankind’s very first source of energy. Today it is still the most important single source of renewable energy providing about 6 percent of the global total primary energy supply. More than two billion people depend on wood energy for cooking and/or heating, particularly in households in developing countries. It represents the only domestically available and affordable source of energy. Private households’ cooking and heating with woodfuels represents one third of the global renewable energy consumption, making wood the most decentralized energy in the world. Woodfuels arise from multiple sources including forests, other wooded land and trees outside forests, co-products from wood processing, post-consumer recovered wood and processed wood-based fuels. Wood energy is also an important emergency backup fuel. Societies at any socio-economic level will switch easily back to wood energy when encountering economic difficulties, natura...

Heating oil

Heating oil is any petroleum product or other oil used for heating; a fuel oil. Most commonly, it refers to low viscosity grades of fuel oil used for furnaces or boilers use for home heating and in other buildings. Home heating oil is often abbreviated as HHO. Most heating oil products are chemically very similar to diesel fuel used as motor fuel; motor fuel is typically subject to higher fuel taxes. Many countries add fuel dyes to heating oil, allowing law enforcement to check if a driver is evading fuel taxes. Since 2002, Solvent Yellow 124 has been added as a "Euromarker" in the European Union; untaxed diesel is known as "red diesel" in the United Kingdom. Heating oil is commonly delivered by tank truck to residential, commercial and municipal buildings and stored in above-ground storage tanks ("ASTs") located in the basements, garages,...

Chinese firms turn away delisting as U.S. review guard dog gets full examination access

The U.S. bookkeeping guard dog on Thursday said it has full admittance to review and explore firms in China unexpectedly, eliminating the gamble that around 200 Chinese organizations could be started off U.S. stock trades. The assertion from the Public Organization Bookkeeping Oversight Board (PCAOB) marks a triumph for U.S. controllers and a help for Chinese firms, including Alibaba, confronting delisting in the midst of rough relations between the world's biggest economies. Washington and Beijing have been secured in a warmed exchange and innovation war. "Without precedent for history, we can perform full and exhaustive examinations and examinations to uncover expected issues and consider firms responsible to fix them," said PCAOB Seat Erica Williams. "This falls into the classification of a game changing perspective on Chinese organizations in light of the fact that the danger of their delisting appears to have been dispensed with," said Craftsmanship Hogan,...

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