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Adeel Arshad-048
Ehtisham Azeem-28
M.faizan-014
Bilal yaqoob-076
M-Ilyas-88
Azaan Qaiser-064
 The Carnot cycle , is a thermodynamic
process, that describes how a fluid is used to
convert thermal energy into work.
 Nicolas Léonard Sadi carnot.
 It is related to the theory of heat engines.
 High Efficiency
 Multi-Source Engine
 Better reliability and easier maintenance
 Reversible
 Safe, discrete and oxygen-free
 Modularity and flexibility
 Most engines have a thermodynamic limit of
37% (little bit higher for diesel engines).
 Practical efficiency depends of temperature
level and differences.
 Waste heat is easily harvested (compared to
waste heat from an internal combustion
engine) making Carnot engines useful for
dual-output heat and power systems
 Carnot engines can run directly on any
available heat source.
 The engine mechanisms are in some ways
simpler than other reciprocating engine type.
 No valves are needed, and the burner system
can be relatively simple.
 Unlike other technologies, the Carnot engine
is very suitable for low temperature.
 A Carnot engine uses a single-phase working
fluid thus for a properly designed system the
risk of explosion is low.
 In comparison, a steam engine uses a two-
phase gas/liquid working fluid, so a faulty
release valve can cause an explosion.
 Moreover the Carnot engine can be built to
run quietly and without an air supply, for air-
independent operation (i.e: submarines).
 Possibility to use the same engine for
different applications with only minor
modifications.
 Moreover, the Carnot architecture allows to
develop a wide range of power based on the
same design. It means the possibility of
scaling up or down the engine power without
the need of costly and time consuming
design studies.
 A pressure volume diagram is used to
describe corresponding changes
in volume and pressure in a system.
 The PV diagram, called an indicator diagram,
was developed by James Watt and his
employee John Southern (1758–1815) to
improve the efficiency of engines.
 This is the PV diagram.
 isothermal segments (AB and CD) occur
when there is perfect thermal contact
between the working fluid and one of the
reservoirs, so that whatever heat is needed to
maintain constant temperature will flow into
or out of the working fluid, from or to the
reservoir.
 the adiabatic segments (BC and DA) occur
when there is perfect thermal insulation
between the working fluid and the rest of the
universe, including both reservoirs, thereby
preventing the flow of any heat into or out of
the working fluid.
 Phases of the Carnot's Cycle
The sequence of steps in the Carnot's
Reversible isothermal expansion (1-2, TH=constant)
 Reversible adiabatic expansion (2-3, Q=0, THTL)
 Reversible isothermal compression (3-4,
TL=constant)
 Reversible adiabatic compression (4-1, Q=0,
TLTH)
 In thermodynamics, the thermal efficiency is
a measure of performance of a device that
uses thermal energy.
 For example:
 an internal combustion engine, a steam
turbine or a steam engine, a boiler, a furnace,
or a refrigerator for example.
 The Carnot Cycle is an entirely theoretical
thermodynamic cycle utilizing reversible
processes.
 The ultimate thermal efficiency can then be
used to compare the efficiencies of other
cycles operating between the same two
temperatures.
 The thermal efficiency of any engine working
between the temperatures of T1 and T2 is:
 i.e. increase the temperature difference
under which the engine works.
 1) All types of vehicles that we use, cars,
motorcycles, trucks, ships, aero planes, and
many other types work on the basis of second
law of thermodynamics and Carnot Cycle.
They may be using petrol engine or diesel
engine, but the law remains the same.
 2) All the refrigerators, deep freezers,
industrial refrigeration systems, all types
of air-conditioning systems, heat pumps, etc
work on the basis of the Carnot cycle.
carnotcycle-150203100850-conversion-gate02.pdf

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carnotcycle-150203100850-conversion-gate02.pdf

  • 1. Adeel Arshad-048 Ehtisham Azeem-28 M.faizan-014 Bilal yaqoob-076 M-Ilyas-88 Azaan Qaiser-064
  • 2.
  • 3.  The Carnot cycle , is a thermodynamic process, that describes how a fluid is used to convert thermal energy into work.  Nicolas Léonard Sadi carnot.  It is related to the theory of heat engines.
  • 4.  High Efficiency  Multi-Source Engine  Better reliability and easier maintenance  Reversible  Safe, discrete and oxygen-free  Modularity and flexibility
  • 5.  Most engines have a thermodynamic limit of 37% (little bit higher for diesel engines).  Practical efficiency depends of temperature level and differences.  Waste heat is easily harvested (compared to waste heat from an internal combustion engine) making Carnot engines useful for dual-output heat and power systems
  • 6.  Carnot engines can run directly on any available heat source.
  • 7.  The engine mechanisms are in some ways simpler than other reciprocating engine type.  No valves are needed, and the burner system can be relatively simple.  Unlike other technologies, the Carnot engine is very suitable for low temperature.
  • 8.  A Carnot engine uses a single-phase working fluid thus for a properly designed system the risk of explosion is low.  In comparison, a steam engine uses a two- phase gas/liquid working fluid, so a faulty release valve can cause an explosion.  Moreover the Carnot engine can be built to run quietly and without an air supply, for air- independent operation (i.e: submarines).
  • 9.  Possibility to use the same engine for different applications with only minor modifications.  Moreover, the Carnot architecture allows to develop a wide range of power based on the same design. It means the possibility of scaling up or down the engine power without the need of costly and time consuming design studies.
  • 10.  A pressure volume diagram is used to describe corresponding changes in volume and pressure in a system.  The PV diagram, called an indicator diagram, was developed by James Watt and his employee John Southern (1758–1815) to improve the efficiency of engines.
  • 11.  This is the PV diagram.
  • 12.  isothermal segments (AB and CD) occur when there is perfect thermal contact between the working fluid and one of the reservoirs, so that whatever heat is needed to maintain constant temperature will flow into or out of the working fluid, from or to the reservoir.
  • 13.  the adiabatic segments (BC and DA) occur when there is perfect thermal insulation between the working fluid and the rest of the universe, including both reservoirs, thereby preventing the flow of any heat into or out of the working fluid.
  • 14.  Phases of the Carnot's Cycle The sequence of steps in the Carnot's Reversible isothermal expansion (1-2, TH=constant)  Reversible adiabatic expansion (2-3, Q=0, THTL)  Reversible isothermal compression (3-4, TL=constant)  Reversible adiabatic compression (4-1, Q=0, TLTH)
  • 15.
  • 16.  In thermodynamics, the thermal efficiency is a measure of performance of a device that uses thermal energy.  For example:  an internal combustion engine, a steam turbine or a steam engine, a boiler, a furnace, or a refrigerator for example.
  • 17.  The Carnot Cycle is an entirely theoretical thermodynamic cycle utilizing reversible processes.  The ultimate thermal efficiency can then be used to compare the efficiencies of other cycles operating between the same two temperatures.
  • 18.  The thermal efficiency of any engine working between the temperatures of T1 and T2 is:  i.e. increase the temperature difference under which the engine works.
  • 19.  1) All types of vehicles that we use, cars, motorcycles, trucks, ships, aero planes, and many other types work on the basis of second law of thermodynamics and Carnot Cycle. They may be using petrol engine or diesel engine, but the law remains the same.
  • 20.  2) All the refrigerators, deep freezers, industrial refrigeration systems, all types of air-conditioning systems, heat pumps, etc work on the basis of the Carnot cycle.