Thermodynamics rankine cycle problem

In summary, the conversation discusses the use of steam in an ideal rankine cycle with superheating. The steam enters the turbine at a temperature of 440 °C and exits at a pressure of 3.0 bar. The conversation also mentions the sketching of a T-S diagram and the determination of thermal efficiency. The assumption is made that state 1 refers to the turbine inlet and state 2 refers to the turbine outlet. The question is raised about finding the pressure at state 1 and the relationship between state 1 and state 2 in terms of entropy. There is also a question about the availability of data for superheated steam in steam tables and the entropy of the steam in state 2.
  • #1
Robax
2
0
1. Steam is the working in an ideal rankine cycle with super heating . Super heated vapor (state 1)
enters the turbine at a temperature of 440 °C. Saturated vapor(state 2) exits the turbine at a pressure of 3.0 bar.2. a) Sketch T-S diagram.
b)Determine the thermal efficiency of the ideal rankine cycle.

Assumption:
1...Turbine in
2... Turbine out
3... Condenser out
4... Boiler in

The Attempt at a Solution



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  • #2
my question is that how I can find out the pressure of the cycle at state 1?
 
Last edited:
  • #3
What is the relationship between state 1 and state 2 in terms of entropy? Does your steam tables have data for superheated steam? What is the entropy of the steam in state 2?
 

Related to Thermodynamics rankine cycle problem

1. What is a thermodynamics rankine cycle?

A thermodynamics rankine cycle is a theoretical cycle that describes the process of energy conversion in a steam power plant. It involves the use of steam to generate energy by following a four-step process: compression, heating, expansion, and cooling.

2. What is the purpose of a rankine cycle in thermodynamics?

The purpose of a rankine cycle is to convert heat energy into mechanical energy, which can then be used to produce electricity or perform other types of work. It is commonly used in steam power plants, where heat from the combustion of fuel is used to produce steam, which then drives a turbine to generate electricity.

3. How does a rankine cycle work?

A rankine cycle works by taking a fluid (usually water) and subjecting it to a series of processes that change its temperature and pressure. First, the fluid is compressed, then heated, then expanded, and finally cooled. This results in the production of mechanical energy that can be used to generate electricity.

4. What are the main components of a rankine cycle?

The main components of a rankine cycle include a boiler, turbine, condenser, and pump. The boiler is where the fluid is heated and converted into steam, the turbine is where the steam expands and drives a generator, the condenser is where the steam is cooled back into a liquid, and the pump is used to increase the pressure of the fluid before it re-enters the boiler.

5. What are the major advantages of a rankine cycle?

One of the major advantages of a rankine cycle is its ability to use a wide variety of fuels, including coal, natural gas, and nuclear energy. It is also a well-established and reliable technology that can be easily scaled up or down to meet different energy demands. Additionally, the use of steam as the working fluid allows for efficient and cost-effective energy conversion.

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