Almost 50% of the heat
generated is lost at the condenser as heat rejection. It is unavoidable as with
out heat rejection it is not possible to convert heat energy into mechanical
energy and drive the turbine without drop in temperature. Therefore majority of
the loss takes place in the condenser. Thus efficiency of the thermal power
plant is between 30-35%.
On What Cycle does
Thermal Power Plant operate?
Thermal Power plant
works on the principle of Rankine cycle
Why Generation Voltage
in Thermal Power Plant is between 11kV to 33kV?
The current carrying
conductor cross section depends upon the magnitude of the current it is
carrying and insulation strength of the conductor depends on the maximum
voltage it can withstand. Therefore while designing the generator an optimum
value is chosen between the amount of the current and voltage conductor can
withstand.
What are the different
circuits in Thermal Power Plant?
Some of the major
circuits in the thermal power plant are:
·
Coal and Ash circuit
·
Air and gas circuit
·
Cooling water circuit
·
Feed water and steam
flow circuit
How efficiency of
Thermal Plant can be improved?
Some of the methods by
which the efficiency of the thermal plant can be improved are:
·
By increasing the
temperature and pressure of the steam entering the turbine
·
By reducing the
pressure in the condenser
·
By reheating the steam
between different stages between the turbine
Advantages and
Disadvantages of Thermal Power Plant?
Advantages:
·
Thermal Power Plants
can be operated near the load centers unlike hydro and nuclear plants
·
Requires less space
compared to hydro plants and cost of construction is less
·
Running or operating
costs are less compared to diesel or gas plants
·
Can able to handle
over load for certain period of time
Disadvantages:
·
Emits green house
gases and causes pollution
·
Coal and Ash handling
requires large area
·
Efficiency is low
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