What is the efficiency of Carnot engine when the temperature of source and sink are equal?

Answer: The efficiency of a Carnot’s engine at a particular source and sink temperature is 12 . When the sink temperature is reduced by 100∘C, the engine efficiency, becomes 23.

How does the temperature of the heat source and heat sink affect the efficiency of steam engines?

Steam Power Plant Systems The Carnot cycle proved that in the steam-water cycle the lower the heat sink temperature the higher the cycle efficiency. This means the condenser pressure should be as low as possible.

Can heat engine efficiency be increased by increasing the cold sink temperature?

Therefore, the efficiency of the heat engine can be increased by decreasing the temperature of the cold sink or increasing the temperature of the hot source.

Why are heat engines not 100\% efficient?

A heat engine is considered to be 100\% efficient if only all the heat is converted into useful work or mechanical energy. Since heat engines cannot convert all the heat energy into mechanical energy, their efficiency can never be 100\%.

What should be the temperature of the sink for efficiency of Carnot engine to be unity?

This means that the cold sink is at a temperature of around 280-300 Kelvin, and the hot sources are from burning fuels burn at a temperature of approximately 1100 Kelvin (although research always tries to drive that temperature higher). These temperatures give a Carnot efficiency value of or so.

Is Carnot engine and heat engine same?

The second law of thermodynamics can be restated in terms of the Carnot cycle, and so what Carnot actually discovered was this fundamental law. Any heat engine employing the Carnot cycle is called a Carnot engine. What is crucial to the Carnot cycle—and, in fact, defines it—is that only reversible processes are used.

Is Carnot cycle the most efficient?

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.

What is the efficiency of a Carnot heat engine?

The efficiency of a Carnot heat engine is given by the Formula: 1 – T2/T1, which has been derived above. Thus the efficiency will completely depend on the temperatures of the source and the sink and is not a constant, However for a given set of source temperature and sink temperature the Carnot heat engine is the most efficient engine possible.

What is a working fluid in a Carnot cycle?

Q1. What is a working fluid in Carnot’s cycle? The working fluid in a Carnot’s cycle is an ideal gas. Q2. What is a Carnot heat engine? Carnot heat engine is a theoretical engine that operates on a reversible carnot cycle. It has maximum efficiency that a heat engine can possess.

What is a Carnot cycle in thermal engineering?

Carnot cycle is a theoretical cycle with the highest possible efficiency of all thermodynamic cycles. Thermal Engineering pV diagram of Carnot cycle. The area bounded by the complete cycle path represents the total work that can be done during one cycle.

Is the Carnot efficiency valid for reversible processes?

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 valid also for real thermodynamic cycles.