The major advantages of a combined

The major advantages of a combined cycle system is the improved
thermal efficiency and low environmental emissions with the use of
natural gas as a fuel. It also offers the following:
1. A shorter schedule, with the operation of the gas turbine in about
1 year and the addition of the steam cycle generally within an
additional year.
2. The gas turbine portion of the system can be used by itself for
rapid startup and in meeting peak power requirements of the electric
system. The steam system requires approximately an hour to
be in operation from a cold start.
3. Low capital cost as compared with other firing methods such as
coal firing.
4. Reduced emissions.
However, the disadvantages of the system are significant and must
be seriously evaluated. These include the use of higher-cost natural
gas, the potential for the unavailability of this critical resource, potentially
higher maintenance costs of the system, and lower availability.
The gas turbine combined cycle system is used primarily for
electricity production, but it also can be part of a cogeneration system
where the heat-recovery portion of the system also can be used to furnish
process steam as well as electricity. A gas turbine system without
a combined steam cycle results in a low efficiency of approximately 30
percent. Steam could be used for heating or in a process, and such
systems can obtain over 60 percent of total energy use as compared
with the near 50 percent of a combined cycle system that is designed to
produce electricity only.
A simple gas turbine system is shown in Fig. 2.53, and it consists of
an air compressor, a combustor where the fuel (generally natural gas)
is burned, and a gas turbine that drives an electric generator. It is
basically a simple system, and when compared with a coal-fired
steam cycle system, it results in low capital cost and a relatively short
delivery schedule. This gas turbine system is used by some utilities to
increase their electric capacity in small increments, especially when
the capacity is needed to fill intermittent operation.
Because of its use of natural gas, complex and costly environmental
control systems are not required, and as a result, the permitting
process for the location of these facilities is shorter, since the plants are
more acceptable to the public. This acceptability also leads to a shorter
schedule for installation and operation of such a system. On the negative
side, these plants use natural gas, a critical resource for home
heating and other specific applications. The viability of the gas turbine

Kết quả (Anh) 1:

The major advantages of a combined cycle system is the improvedthermal efficiency and low environmental emissions with the use ofnatural gas as a fuel. It also offers the following:1. A shorter schedule, with the operation of the gas turbine in about1 year and the addition of the steam cycle generally within anadditional year.2. The gas turbine portion of the system can be used by itself forrapid startup and in meeting peak power requirements of the electricSystem. The steam system requires approximately an hour tobe in operation from a cold start.3. Low capital cost as compared with other methods such as firingcoal firing.4. Reduced emissions.However, the disadvantages of the system are significant and mustbe seriously evaluated. These include the use of higher-cost naturalgas, and the potential for the unavailability of this critical resource, potentiallyhigher maintenance costs of the system, and lower availability.The gas turbine combined cycle system is used primarily forelectricity production, but it also can be part of a cogeneration systemwhere the heat-recovery portion of the system also can be used to furnishprocess steam as well as electricity. A gas turbine system withouta combined steam cycle results in a low efficiency of approximately 30percent. The steam could be used for heating or in a process, and suchsystems can obtain over 60 percent of total energy use as comparedwith the near 50 percent of a combined cycle system that is designed toproduce electricity only.A simple gas turbine system is shown in Fig. 2.53, and it consists ofan air compressor, a combustor where the fuel (generally natural gas)is burned, and a gas turbine that drives an electric generator. It isbasically a simple system, and when compared with a coal-firedthe steam cycle system, it results in low capital cost and a relatively shortdelivery schedule. This gas turbine system is used by some utilities toincrease their electric capacity in small increments, especially whenthe capacity is needed to fill intermittent operation.Because of its use of natural gas, complex and costly environmentalcontrol systems are not required, and as a result, the permittingprocess for the location of these facilities is shorter, since the plants aremore acceptable to the public. This acceptability also leads to a shorterschedule for installation and operation of such a system. On the negativeside, these plants use natural gas, a critical resource for homeheating and other specific applications. The viability of the gas turbine

Kết quả (Anh) 2:

The Advantages of a combined cycle major system is the improved
thermal efficiency and low emissions with the use of Environmental
natural gas as a fuel. It also offers sau:
1. A shorter schedule, with the operation of the gas turbine printed about
1 year and the addition of the steam cycle trong Generally an
additional year.
2. The gas turbine portion of the system can be used by Itself for
rapid startup and print meeting requirements of the electric power peak
system. The steam system requires an hour khoảng to
be printed from a cold start operation.
3. Low capital cost with other firing methods as sánh như
coal firing.
4. Reduced emissions.
Tuy nhiên, the Disadvantages of the system are the significant and phải
Be Evaluated seriously. These include the use of Higher-cost natural
gas, the potencial for the unavailability of this critical resource, Potentially
Higher Costs of the system maintenance, and lower availability.
The gas turbine combined cycle system is used chính cho
Electricity production, but it can cũng Be part of a cogeneration system
where the heat-recovery portion of the system can be used to furnish cũng
process steam as well as Electricity. A gas turbine system without
a steam combined cycle results in a low efficiency of khoảng 30
percent. Steam could be used for heating or in a process, and such '
systems over 60 percent can lấy of total energy use as sánh
with the near 50 percent of a combined cycle system nằm Designed to
Produce Electricity only.
A simple gas turbine system is Shown Fig print. 2:53, and It consists of
an air compressor, a combustor where the fuel (natural gas Generally)
is Burned, and a gas turbine drives an electric generator mà. It is
Basically a simple system, and khi sánh coal-fired with a
steam cycle system, it results print Relatively low capital cost and a short
delivery schedule. This system is used by gas turbine some utilities to
ask for their tăng electric capacity at small increments print, Especially khi
is needed to fill the capacity at intermittent operation.
Because of its use of natural gas, complex and Costly Environmental
control systems are not required, and as a result, the Permitting
process for the location of những facilities is shorter, since the plants are
more acceptable to the public. This leads to a shorter acceptability cũng
schedule for installation and operation of such 'a system. On the negative
side, plants use natural gas những, a critical resource for home
heating and other specific applications. The viability of the gas turbine