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Rankine cycle comprises of
- a)two isentropic processes and two constant volume processes
- b)two isentropic processes and two constant pressure processes
- c)two isothermal processes and two constant pressure processes
- d)two isothermal processes and two constant volume processes
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Rankine cycle comprises ofa)two isentropic processes and two constant ...
Rankine cycle is a reversible cycle which have two constant pressure and two isentropic processes. These are four processes in the Rankine cycle:
Process 1 – 2: Isentropic compression
Working fluid is pumped from low to high pressure.
Process 2 – 3: Isobaric heat addition
The high-pressure liquid enters a boiler where it is heated at constant pressure by an external heat source to become a dry saturated vapour.
Process 3 – 4: Isentropic expansion
The dry saturated vapour expands through a turbine, generating power.
Process 4 – 1: Isobaric heat rejection
The wet vapour then enters a condenser where it is condensed at a constant pressure and temperature to become a saturated liquid.
Most Upvoted Answer
Rankine cycle comprises ofa)two isentropic processes and two constant ...
Rankine Cycle:
The Rankine cycle is a thermodynamic cycle that is commonly used in steam power plants to generate electricity. It consists of four processes: two isentropic processes and two constant pressure processes.
Isentropic Processes:
An isentropic process is a process during which the entropy of the system remains constant. In the Rankine cycle, there are two isentropic processes:
1. Isentropic Expansion (Process 1-2): The high-pressure liquid water enters the turbine, where it expands and does work on the turbine blades. This process is isentropic because the entropy of the water remains constant during expansion.
2. Isentropic Compression (Process 3-4): The low-pressure steam from the turbine exhaust is compressed in the condenser to liquid water. This process is also isentropic because the entropy remains constant during compression.
Constant Pressure Processes:
A constant pressure process is a process during which the pressure of the system remains constant. In the Rankine cycle, there are two constant pressure processes:
1. Constant Pressure Heat Addition (Process 2-3): The high-pressure steam from the turbine enters the condenser, where it rejects heat to the cooling water. This process occurs at constant pressure as the steam condenses into liquid water.
2. Constant Pressure Heat Rejection (Process 4-1): The low-pressure liquid water from the condenser is pumped back to the boiler, where it is heated to high pressure. This process also occurs at constant pressure as the water is heated.
Explanation of Option B:
The correct answer is option B, which states that the Rankine cycle comprises two isentropic processes and two constant pressure processes. This is because:
- The isentropic expansion (Process 1-2) and isentropic compression (Process 3-4) are two isentropic processes in the cycle.
- The constant pressure heat addition (Process 2-3) and constant pressure heat rejection (Process 4-1) are two constant pressure processes in the cycle.
Therefore, option B accurately describes the processes involved in the Rankine cycle.
The Rankine cycle is a thermodynamic cycle that is commonly used in steam power plants to generate electricity. It consists of four processes: two isentropic processes and two constant pressure processes.
Isentropic Processes:
An isentropic process is a process during which the entropy of the system remains constant. In the Rankine cycle, there are two isentropic processes:
1. Isentropic Expansion (Process 1-2): The high-pressure liquid water enters the turbine, where it expands and does work on the turbine blades. This process is isentropic because the entropy of the water remains constant during expansion.
2. Isentropic Compression (Process 3-4): The low-pressure steam from the turbine exhaust is compressed in the condenser to liquid water. This process is also isentropic because the entropy remains constant during compression.
Constant Pressure Processes:
A constant pressure process is a process during which the pressure of the system remains constant. In the Rankine cycle, there are two constant pressure processes:
1. Constant Pressure Heat Addition (Process 2-3): The high-pressure steam from the turbine enters the condenser, where it rejects heat to the cooling water. This process occurs at constant pressure as the steam condenses into liquid water.
2. Constant Pressure Heat Rejection (Process 4-1): The low-pressure liquid water from the condenser is pumped back to the boiler, where it is heated to high pressure. This process also occurs at constant pressure as the water is heated.
Explanation of Option B:
The correct answer is option B, which states that the Rankine cycle comprises two isentropic processes and two constant pressure processes. This is because:
- The isentropic expansion (Process 1-2) and isentropic compression (Process 3-4) are two isentropic processes in the cycle.
- The constant pressure heat addition (Process 2-3) and constant pressure heat rejection (Process 4-1) are two constant pressure processes in the cycle.
Therefore, option B accurately describes the processes involved in the Rankine cycle.
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Rankine cycle comprises ofa)two isentropic processes and two constant volume processesb)two isentropic processes and two constant pressure processesc)two isothermal processes and two constant pressure processesd)two isothermal processes and two constant volume processesCorrect answer is option 'B'. Can you explain this answer?
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