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.

Comments

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,...

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...

Natural gas

Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Usually low levels of trace gases like carbon dioxide, nitrogen, hydrogen sulfide, and helium are also present. Natural gas is colorless and odorless, so odorizers such as mercaptan, which smells like sulfur or rotten eggs, are commonly added to natural gas supplies for safety so that leaks can be readily detected. Not to be confused with gasoline, biogas, or liquefied petroleum gas. Natural gas is a fossil fuel and non-renewable resource that is formed when layers of organic matter (primarily marine microorganisms) decompose under anaerobic conditions and are subjected to intense heat and pressure underground over millions of years.The energy that the decayed organisms originally obtained from the sun via photosynthesis is stored as chemical energy within the molecules of methane a...

Site with benefits

Search This Blog

Cripto World