# What is Carnot cycle What are the four processes which constitute the cycle?

## What is Carnot cycle What are the four processes which constitute the cycle?

A Carnot cycle is defined as an ideal reversible closed thermodynamic cycle. Four successive operations are involved: isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression.

What is the area under the PV diagram of a Carnot cycle?

The Carnot cycle is composed of four reversible processes. ∴ The area under the PV diagram represents the work done.

What is Carnot Theorem?

Carnot’s theorem, also known as Carnot’s rule, or the Carnot principle, can be stated as follows: No heat engine operating between two heat reservoirs can be more efficient than a reversible heat engine operating between the same two reservoirs.

### What is QH and QC?

(Qc). During the cycle, Heat (Qc) is absorbed from a source at low T (e.g. outside air or food) by a circulating fluid. Work is done on the engine by a compressor. Heat (Qh) is expelled to a source at higher T (e.g. room).

What is TL and Th in thermodynamics?

A heat engine with Carnot cycle, also called Carnot heat engine, can be simplified by the following model: A reversible heat engine absorbs heat QH from the high-temperature reservoir at TH und releases heat QL to the low-temperature reservoir at TL. The temperatures TH and TL remain unchanged.

What is T-s diagram show Carnot cycle on T-s diagram?

5- On a T-s diagram, a vertical line represents an isentropic process (no heat transfer and reversible). The Carnot cycle is the most efficient power cycle and it is composed of four totally reversible processes: Fig. 2-2: P-v and T-s diagrams for the Carnot cycle (in a cylinder-piston).

#### What is Carnot cycle and its efficiency?

What is Carnot cycle find its efficiency? The Carnot Cycle describes the most efficient possible heat engine, involving two isothermal processes and two adiabatic processes. It is the most efficient heat engine that is possible within the laws of physics. Or, in other words, no process can be 100% efficient because energy is always lost somewhere.

What are the uses of Carnot cycle?

– Isothermal expansion – Adiabatic expansion – Isothermal compression and – Adiabatic compression. A system consisting of ideal gas undergoes these four processes to return to its original state

What is the difference between Carnot cycle and Rankine cycle?

Firstly,carnot cycle involves transition from an isothermal process to an adiabatic process.

• The heat exchange in carnot cycle is isothermal which needs the working fluid to either phase change or the process be extremely slow.
• In rankine cycle,the pumping losses are less because the pumping starts at saturated water condition which is eqsy to pump.
• ## What is the maximum efficiency of Carnot cycle?

Q H is the heat supplied to the system from a fuel

• Q L is the heat given off by the system to the cold sink known as waste heat
• W is the useful work achieved by the system