Schematic of the basic rankine cycle

[skysurani]

Thermodynamic

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A)Draw a schematic of the basic rankine cycle and its equipment
B) ddiscuss any three practical improvements to make the basic rankine cycle more efficient, hightlighting the benefit that is thus realized.
C) draw a T-s diagram of the improvements

i got answer to the part A.
i got one answer to the part B. i know that reheat, lower the condenser pressure, integrity condenser to high temp, but i don't to the benefit of this change or is there more change that would make better rankine cycle

also i don't know the t-s diagram of the improvements rankine cycle

please help me
thank you

 

[Aaron Bex]

For part B, reheat can help to increase the efficiency of the Rankine cycle by reducing the losses due to irreversibility; lowering the condenser pressure can help to reduce the back work and improve the thermal efficiency; and using an integral condenser with a higher temperature can help to reduce the size of the condenser and increase the thermal efficiency. The benefit of these improvements is that they can increase the efficiency of the Rankine cycle, reducing the energy input required to generate the same amount of power output.

For part C, a T-s diagram of the improved Rankine cycle should look like a regular Rankine cycle diagram, with the addition of a reheater, a lower condenser pressure, and a higher temperature condenser.

 

[ravenprp]

A) The basic rankine cycle is a thermodynamic cycle commonly used in power plants to convert heat energy into mechanical work. It consists of four main components: a boiler, a turbine, a condenser, and a pump. The schematic diagram of the basic rankine cycle is as follows:

Boiler → Turbine → Condenser → Pump → Boiler

The boiler is where high pressure liquid water is heated to its boiling point, producing high pressure steam. This steam then enters the turbine, where it expands and does work by rotating the blades of the turbine. The steam then exits the turbine and enters the condenser, where it is cooled and condensed back into liquid form. The liquid is then pumped back into the boiler to repeat the cycle.

B) There are several practical improvements that can be made to the basic rankine cycle to make it more efficient. Three of these improvements include reheat, lower condenser pressure, and using an intercooler to cool the steam between stages of the turbine.

Reheat involves reheating the steam after it has expanded through the first stage of the turbine. This allows the steam to do more work in the second stage of the turbine, increasing the overall efficiency of the cycle. Lowering the condenser pressure also increases the efficiency of the cycle by reducing the temperature difference between the hot and cold sides of the cycle. This results in a higher Carnot efficiency and therefore a more efficient cycle. Using an intercooler between stages of the turbine allows for the steam to be cooled and condensed before entering the next stage, reducing the work required by the compressor and improving the overall efficiency of the cycle.

The benefits of these improvements include increased efficiency, which leads to a higher power output for the same amount of heat input. This means that less fuel is required to produce the same amount of power, resulting in cost savings and reduced emissions.

C) The T-s diagram for the improved rankine cycle would have a higher efficiency compared to the basic rankine cycle. This is shown in the diagram below:

[INSERT DIAGRAM HERE]

The blue line represents the basic rankine cycle, while the red line represents the improved cycle with reheat, lower condenser pressure, and an intercooler. As you can see, the red line has a larger area under the curve, indicating a higher work output and therefore a more efficient cycle.

In conclusion, the basic rankine cycle can be improved through practical changes such as reheat, lower condenser pressure