The ideal Rankine cycle consists of the following four processes, as shown on the T-s diagram on the left: 1-2: Isentropic compression in a pump 3-4: Isentropic expansion in a turbine 4-1: Constant pressure heat rejection in a condenser
How many processs are there in Rankine cycle?
There are four processes in the Rankine cycle
What type of process is the ideal Rankine cycle?
Explanation: Ideal Rankine Cycle is a reversible process Explanation: For analytical purposes, always steady flow operation is considered, as in unsteady flow, the various fluid properties vary considerably which remain same when the steady flow operation is assumed
What is the sequence of Rankine cycle?
In the Rankine cycle the working substance of the engine undergoes four successive changes: heating at constant pressure, converting the liquid to vapour; reversible adiabatic expansion, performing work (as by driving a turbine); cooling at constant pressure, condensing the vapour to liquid; and reversible adiabatic
What are the main components of Rankine cycle?
The Rankine Cycle This cycle is composed of four key parts: the generation of high-pressure steam, a turbine, a condenser, and a pump Steam is generated in the boiler and then transferred to the turbine
What is meant by Rankine cycle?
The Rankine cycle, also called the Rankine vapor cycle, is a thermodynamic cycle that converts heat into mechanical energy The Rankine cycle is name after William Johnson Macquorn Rankine, a 19th century Scottish engineer and physicist known for his research in the thermodynamic properties of steam
Why is the Rankine cycle modified?
In order to overcome the above-mentioned difficulty, the Rankine cycle is slightly modified where the expansion stroke of the piston is stopped at point 5 by cutting the toe of the Rankine cycle and the steam is expanded at constant volume
What is regenerative Rankine cycle?
This section will introduce one such cycle – the ideal regenerative Rankine cycle, which increases the fluid average temperature during the heat addition process This process is called regeneration and the heat exchanger where heat is transferred from steam to feedwater is called a regenerator, or a feedwater heater
What are the four basic components of a steam power plant?
What is Steam Power Plant It is the power plant which is used to generate electricity by the use of steam turbine The major components of these power plants are boiler, steam turbine, condenser, and water feed pump
What is the difference between Rankine and modified Rankine cycle?
The Rankine cycle is represented by 1-2-3-4-1 cycle on p-v and T-s diagrams in Fig 351 2-3: Exhaust of steam in the condenser or atmosphere The Rankine cycle with incomplete expansion of steam is called the incomplete expansion cycle or modified Rankine cycle
What is difference between Rankine and actual Rankine cycle?
The efficiency of the ideal Rankine cycle is close to the efficiency of the Carnot Cycle… Difference Between Ideal and Actual Rankine CycleWhat is difference between Rankine and actual Rankine Cycle? 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
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 are the main process in the regenerative Rankine cycle?
The Ideal Regenerative Rankine Cycle The regeneration process in steam power plants is accomplished by extracting (or bleeding) steam from turbine at various stages and feed that steam in heat exchanger where the feedwater is heated These heat exchangers are called regenerator or feedwater heater (FWH)
How does an organic Rankine cycle work?
The working principle of the organic Rankine cycle is the same as that of the Rankine cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine, screw, scroll, or other expander), and then through a condenser heat exchanger where it is finally re-condensed
What are the 4 main parts of a power station?
What are the 4 main parts of a power station? Integrated Head with Nozzle A nuclear reactor and steam generator, core parts of a nuclear power plant, often have problems with welding and assembly with pressurized containers Nuclear Energy Shell Rotor Shaft Turbine Casing Runner Wind Power Shaft
What kind of a process does a steam power plant?
5 What kind of a process does a ‘Steam Power Plant’ undergoes? Explanation: As the internal energy change in the ‘Steam Power Plant’ is ZERO Hence, the entire plant obeys a Cyclic Process
What is steam power cycle?
Power plants generate electrical power by using fuels like coal, oil or natural gas Fuel, burned in the boiler and superheater, heats the water to generate steam The steam is then heated to a superheated state in the superheater This steam is used to rotate the turbine which powers the generator
Why do we use Rankine?
Rankine is commonly used in the aerospace industry in the United States Rankine is to Fahrenheit what Kelvin is for Celsius So when people in the United States were creating programs and using equations that needed an absolute temperature, they used Rankine before Celsius became dominate for scientific calculations
What is entropy in Rankine cycle?
The Rankine cycle is a typical heat-work conversion process with phase change and entropy generation is most widely used in its optimizations The concept of entropy was proposed by Clausius when he analyzed the Carnot cycle [15]
What is the difference between Rankine cycle and Brayton cycle?
The key difference between Rankine cycle and Brayton cycle is that the Rankine cycle is a vapour cycle, whereas the Brayton cycle is a cycle between liquid and vapour phases Both the Rankine cycle and Brayton cycle are thermodynamic cycles
What is the purpose of feed water heater in regenerative Rankine cycle?
In a steam power plant (usually modeled as a modified Rankine cycle), feedwater heaters allow the feedwater to be brought up to the saturation temperature very gradually This minimizes the inevitable irreversibilities associated with heat transfer to the working fluid (water)
What is the difference between reheat and regenerative cycle?
Reheating of steam improved the thermal efficiency of the plant, net work output of turbine, reduction in blade erosion (or quality of steam improve) By regeneration thermal efficiency of the plant can be increased but it does not affect work output from turbine