Power Plants used
in Industries:
Power plants used
in industries are known as captive power plants these are used only for
industry demand. Type of power plant installed in industries depends upon the
fuel feasibility for industry. Most of the industries use gas and diesel power
plants. However nowadays industries are prone towards renewable sources of
energy i.e. Solar and wind.
Power Plants used
in Airplanes:
Engine driven generators are used in airplane due to
accessibility of air. Both AC and DC generators are used for electric
components used in airplane. Aircraft electrical components operate on many different voltages both AC and DC.
The most of the aircraft systems use
-115 volts (V) AC at 400 hertz (Hz)
- 28 volts DC
DC power is generally provided by “self-exciting”
generators containing electromagnets, where the power is generated by a
commutator which regulates the output voltage of 28 volts DC. AC power,
normally at a phase voltage of 115 V, is
generated by an alternator, generally in a three-phase system and at a
frequency of 400Hz. For emergency purposes turbines called RAM AIR turbines are
used- air driven turbine stowed in aircraft
ventral or nose section. Gen. Sizing varies between 5 and
15kVA.Rat is intended to furnish the crew with sufficient power while attempting to restore primary generators.
Power plants used
in Ships:
Power plants used on ships are generally diesel power
plants. The Power Distributed on board a ship
needs to be supplied efficiently throughout the ship. For this the power
distribution system of the ship is used. Ship Generator consisting of prime
mover and alternator .Main switch board
which is a metal enclosure taking power from the diesel generator and supplying
it to different machinery. Bus Bars which act as a carrier and allow transfer
of load from one point to another. Circuit breakers which act as a switch and
in unsafe condition can be tripped to avoid breakdown and accidents. Fuses as
safety device for machinery. In case of the failure of the main power
generation system on the ship, an emergency power system or a standby system is
also present. The emergency power supply ensures that the essential machinery
and system continues to operate the ship. Emergency power can be supplied by
batteries or an emergency generator or even both systems can be used.
Power Plants used
in commercial enterprises:
Virtually all commercial electric energy
is now produced by generators driven by steam from the burning of fossil fuels
or from nuclear sources or by hydropower. A basic steam-power plant includes a
furnace or reactor for raising the temperature of the water in a boiler, or
steam generator, until it changes into steam, and a turbine, which drives the
generator to produce electric power. The electric power produced is brought
from the generating plant to the user through a network of wires called
transmission and distribution lines.
Majority of enterprises use diesel generators to meet their requirements.
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