Why do we study the Carnot cycle?

The Carnot engine — or the Carnot cycle — is important because it describes a heat engine that uses reversible processes that can be handled theoretically. Then we could use the real heat engine to power a Carnot cycle heat pump.

Why Carnot cycle is not practically applicable?

In real engines, the heat transfers at a sudden change in temperature whereas in a Carnot engine, the temperature remains constant. In our day to day lives, reversible processes can’t be carried out and there is no such engine with 100 \% efficiency. Thus, the Carnot cycle is practically not possible.

Why can the Carnot cycle not be used practically for steam power plants?

However; the Carnot cycle is not a suitable model for steam power cycle since: The turbine has to handle steam with low quality which will cause erosion and wear in turbine blades. Thus, the Carnot cycle cannot be approximated in actual devices and is not a realistic model for vapor power cycles.

Why is it necessary for a heat engine to cycle?

If the gas is heated, it expands, moving the piston. Once the gas is heated, moving the piston up, it can be cooled and the piston will move back down. A cycle of heating and cooling will move the piston up and down. A necessary component of a heat engine, then, is that two temperatures are involved.

Why is the Carnot cycle utilized in large power plants?

The Carnot efficiency is valid for reversible processes. These processes cannot be achieved in real cycles of power plants. The Carnot efficiency dictates that higher efficiencies can be attained by increasing the temperature of the steam. This feature is also valid for real thermodynamic cycles.

What is the principle of Carnot engine is Carnot engine 100 efficient why why not?

Carnot’s theorem states that all heat engines between two heat reservoirs are less efficient than a Carnot heat engine operating between the same reservoirs. Every Carnot heat engine between a pair of heat reservoirs is equally efficient, regardless of the working substance employed or the operation details.

Is a temperature difference necessary to operate a heat engine state why or why not?

Yes, a temperature difference is necessary to operate a heat engine because according to the second law of thermodynamics, a temperature difference is necessary to perform work.

Why is the Carnot cycle not possible?

Why the Carnot cycle is not practically possible The Carnot cycle is reversible whereas the real engines are not reversible due to different reasons like friction, heat transfer to the insulating wall etc. In the Carnot cycle, all the reversible processes are extremely slow while real machines work faster.

What is the acarnot cycle?

Carnot cycle was theoritized by French physicist Sadi Carnot in 1824 it is just a theoretical engine and practically impossible to achieve, it serves as a benchmark for practical engines , it mainly comprises 4 internally reversible processes, which are:

What is the difference between Carnot cycle and Rankine cycle?

Carnot cycle work input (analogous to pump work in power plants) is very large, while in Rankine cycle, it is comparatively little. That is why we don’t go for Carnot cycle in power plants but use a more practical Rankine Cycle.

What is the Carnot cycle in refrigerator?

In working of refrigerator, the term Carnot cycle represents the reversed Carnot cycle. As we know that, between the fixed temperature limits, a heat engine operating on Carnot cycle give highest possible efficiency. Similarly, a refrigerator working on reversed Carnot cycle give the highest possible coefficient of performance.