fan efficiency
121Thin film solar cell — Cross section of thin film polycrystalline solar cell. A thin film solar cell (TFSC), also called a thin film photovoltaic cell (TFPV), is a solar cell that is made by depositing one or more thin layers (thin film) of photovoltaic material on a… …
122Uninterruptible power supply — A small free standing UPS …
123Ocean thermal energy conversion — Temperature differences between the surface and 1000m depth in the oceans Ocean Thermal Energy Conversion (OTEC) uses the difference between cooler deep and warmer shallow or surface ocean waters to run a heat engine and produce useful work,… …
124Wind turbine — Offshore wind farm using 5MW turbines REpower 5M in the North Sea off Belgium This article discusses wind powered electrical generators. See windmill for wind powered machinery used to grind grain or pump water. A wind turbine is a device that… …
125Clothes dryer — A modern front load tumble clothes dryer for home application. A clothes dryer or tumble dryer is a household appliance that is used to remove moisture from a load of clothing and other textiles, generally shortly after they are cleaned in a… …
126Diesel locomotive — Three styles of diesel locomotive body: cab unit, hood unit and box cab. These locomotives are operated by Pacific National in Australia …
127Wireless energy transfer — or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous,… …
128Central heating — unit A central heating system provides warmth to the whole interior of a building (or portion of a building) from one point to multiple rooms. When combined with other systems in order to control the building climate, the whole system may be a… …
