Why Carnot cycle Cannot be considered as a practical power plant cycle even though its efficiency is maximum?

Why Carnot cycle Cannot be considered as a practical power plant cycle even though its efficiency is maximum?

The most efficient heat engine cycle is the Carnot cycle, consisting of two isothermal processes and two adiabatic processes. It is not a practical engine cycle because the heat transfer into the engine in the isothermal process is too slow to be of practical value. …

Why is the Carnot cycle only theoretical?

The Carnot cycle is a theoretical cycle that is the most efficient cyclical process possible. Any engine using the Carnot cycle, which uses only reversible processes (adiabatic and isothermal), is known as a Carnot engine. Any engine that uses the Carnot cycle enjoys the maximum theoretical efficiency.

Why Carnot cycle is not practically possible?

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 Carnot cycle is not possible?

Why Carnot cycle efficiency is maximum?

The Carnot cycle is reversible representing the upper limit on the efficiency of an engine cycle. The Carnot cycle achieves maximum efficiency because all the heat is added to the working fluid at the maximum temperature.

Why is Carnot cycle more efficient than Rankine cycle?

For the same maximum and minimum temperature limits of the both cycles also the efficiency of carnot is greater than rankine because for the carnot the method of heat addition is constant temperature process (at high temperature) but for rankine cycle it is constant pressure process it mean the process would like a …

Why is the Carnot cycle not practical for large scale industrial application?

Carnot cycle consists of two isothermal processess and two adiabatc processess. Isothermal process is very slow process whereas adiabatic process is very fast process. so it is not used in practical applications.

Why is the Carnot cycle not used in steam power plants?

A slight modification of this cycle will produce a cycle which is more practical, though of slightly lower thermal efficiency. This practical cycle is known as Rankine cycle and is usually accepted as ideal cycle for steam plants. Another reason for non-acceptance of Carnot cycle as the power cycle is its lower work ratio.

Why is the Carnot cycle the most efficient?

Carnot Cycle. The Carnot cycle can be thought of as the most efficient heat engine cycle allowed by physical laws. When the second law of thermodynamics states that not all the supplied heat in a heat engine can be used to do work, the Carnot efficiency sets the limiting value on the fraction of the heat which can be so used.

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 value of K in carnot cycle?

=K = °C = °F. The conceptual value of the Carnot cycle is that it establishes the maximum possible efficiency for an engine cycle operating between T H and T C. It is not a practical engine cycle because the heat transfer into the engine in the isothermal process is too slow to be of practical value.