Search results
Results from the WOW.Com Content Network
Energy efficiency of cars in towns and on motorways according to the DoE Energy efficiency of electric cars in towns and on motorways according to the United States Department of Energy. A diagram by the United States Department of Energy (DoE) shows cars with internal combustion engines as having efficiency of typically 13% in urban driving ...
A Bowden cable (/ ˈ b oʊ d ən / BOH-dən) [1] is a type of flexible cable used to transmit mechanical force or energy by the movement of an inner cable relative to a hollow outer cable housing. The housing is generally of composite construction, consisting of an inner lining, a longitudinally incompressible layer such as a helical winding or ...
Driver's brake handle in a class 317 electric multiple unit. On trains, the expression emergency brake has several meanings: . The maximum brake force available to the engine driver from the conventional braking system, usually operated by taking the brake handle to its furthest position, through a gate mechanism, or by pushing a separate plunger in the cab.
Electromagnetic brakes or EM brakes are used to slow or stop vehicles using electromagnetic force to apply mechanical resistance (friction). They were originally called electro-mechanical brakes but over the years the name changed to "electromagnetic brakes", referring to their actuation method which is generally unrelated to modern electro-mechanical brakes.
When an Emergency Stop is activated all power is cut to the motor and the emergency brake or bull-wheel brake is activated. In the case of a rollback, some lifts utilize a ratchet like system to prevent the bull-wheel from spinning backwards while newer installations utilize sensors which activate one or more bull-wheel brakes.
A magnetic track brake (Mg brake) is a brake for rail vehicles. It consists of brake magnets, pole shoes , a suspension, a power transmission and, in the case of mainline railroads , a track rod. When current flows through the magnet coil, the magnet is attracted to the rail, which presses the pole shoes against the rail, thereby decelerating ...
Variable renewable energy sources are those that have a fluctuating nature, such as wind power and solar power. In contrast, controllable renewable energy sources include dammed hydroelectricity, bioenergy, or geothermal power. Renewable energy systems have rapidly become more efficient and cheaper over the past 30 years.
The National Renewable Energy Laboratory projects that the levelized cost of wind power will decline about 25% from 2012 to 2030. [16] In fiscal year 2020, congressional appropriations for the Department of Energy contained $464.3 million for NREL. This total included the following amounts for its renewable energy technology programs: [17]