| Rankine Cycle Representation is as follows on P-v and T-s diagrams: | Ideal Rankine Cycle 1-2′-b-3′-4′-1 | Actual Rankine Cycle 1-2-b-3-4-1 |
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What is the difference between Rankine cycle and Brayton cycle?
Rankine cycle is a steam engine, the water is boiled, evaporated, used for work and then condensed for re-use, thus making it a closed cycle. …
The working fluid undergoes a phase change in the
Rankine cycle whereas in Brayton cycle there is no phase change the working fluid always remains in the gaseous phase.
What are the different Rankine cycles?
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Is Rankine cycle real?
The Rankine cycle or Rankine Vapor Cycle is
the process widely used by power plants
such as coal-fired power plants or nuclear reactors. In this mechanism, a fuel is used to produce heat within a boiler, converting water into steam which then expands through a turbine producing useful work.
What is the difference between an ideal and actual cycle?
Difference:
Net Area of the actual cycle is lesser than the Ideal cycle Net Area
because the Work done during the expansion and compression process is not Isentropic. There are some losses in the form of energy loss. … Therefore the Net Work out of the system for an Actual cycle is lesser than the Ideal cycle.
What is the efficiency of Rankine cycle?
In modern nuclear power plants, which operate the Rankine cycle, the overall thermal efficiency is
about one-third (33%)
, so 3000 MWth of thermal power from the fission reaction is needed to generate 1000 MWe of electrical power.
What is the Rankine cycle used for?
Rankine cycle, in heat engines, ideal cyclical sequence of changes of pressure and temperature of a fluid, such as water, used in an engine, such as a steam engine. It is used as
a thermodynamic standard for rating the performance of steam power plants
.
Where is Brayton cycle used?
The modified Brayton cycle is used for
both gas turbines and jet engines
. The turbine is designed to produce a usable torque at the output shaft, while the jet engine allows most of the hot gases to expand into the atmosphere, producing usable thrust.
Is Brayton and Rankine cycle more efficient?
The Brayton cycle, by design, gives higher thermal efficiencies than the Rankine cycle
, and modifications to the Brayton cycle produce a much larger increase in thermal efficiency than for the Rankine cycle; the addition of one extra component in each (reheat in the Rankine cycle, R2 in Table 2, and regeneration in the …
What is actually inlet temperature in Rankine cycle?
What is the actual turbine inlet temperature in Rankine cycle? Explanation: The TIT(Turbine Inlet Temperature) is of the
range 500-570C
.
What is the basic principle of regeneration?
What is the basic principle of regeneration? Explanation: In
regeneration steam from condenser is circulated through turbine to increase steam temperature before it enters boiler
. Explanation: Feedwater is preheated so as to decrease the fuel consumption which increases efficiency.
What is critical point in Rankine cycle?
The critical point is
where the temper- ature and pressure are such that the fluid is no longer classified exclusive- ly as liquid or gas
. It is thought of as a fluid above the critical point. The criti- cal point for water is slightly above 3200 psi.
Why do we use economiser?
An economizer is a
mechanical device used to reduce energy consumption
. Economizers recycle energy produced within a system or leverage environmental temperature differences to achieve efficiency improvements.
What are actual cycles?
What is the Actual cycle? The Actual cycle in the Thermodynamics is
a cycle of operations experienced by the actual Internal combustion engine
where the efficiency of this actual Internal combustion engine is much lower than the Ideal cycle or Air-Standard cycle due to various losses in the processes.
Which is ideal thermodynamics cycle?
Ideal cycles are
simplified thermodynamic closed cycles to analyze the compression, combustion, and expansion process
in an engine with a focus on extraction of work from combustion of the fuel–air mixture.
What is an ideal engine?
An ideal engine is
a machine that does not produce any losses while operating
. It has 100 percent efficiency, and it can work in all conditions. The behavior and efficiency of the system remain constant irrespective of the time and surroundings.
