Heat Engine - Heat Engine Processes

Heat Engine Processes

Cycle Process 1-2
(Compression)		 Process 2-3
(Heat Addition)		 Process 3-4
(Expansion)		 Process 4-1
(Heat Rejection)		 Notes
Power cycles normally with external combustion - or heat pump cycles:
Bell Coleman adiabatic isobaric adiabatic isobaric A reversed Brayton cycle
Carnot isentropic isothermal isentropic isothermal
Ericsson isothermal isobaric isothermal isobaric the second Ericsson cycle from 1853
Rankine adiabatic isobaric adiabatic isobaric Steam engine
Scuderi adiabatic variable pressure
and volume		 adiabatic isochoric
Stirling isothermal isochoric isothermal isochoric
Stoddard adiabatic isobaric adiabatic isobaric

Power cycles normally with internal combustion:
Brayton adiabatic isobaric adiabatic isobaric Jet engines
the external combustion version of this cycle is known as first Ericsson cycle from 1833
Diesel adiabatic isobaric adiabatic isochoric
Lenoir isobaric isochoric adiabatic Pulse jets
(Note: Process 1-2 accomplishes both the heat rejection and the compression)
Otto adiabatic isochoric adiabatic isochoric Gasoline / petrol engines

Each process is one of the following:

  • isothermal (at constant temperature, maintained with heat added or removed from a heat source or sink)
  • isobaric (at constant pressure)
  • isometric/isochoric (at constant volume), also referred to as iso-volumetric
  • adiabatic (no heat is added or removed from the system during adiabatic process which is equivalent to saying that the entropy remains constant, if the process is also reversible.)

Read more about this topic:  Heat Engine

Famous quotes containing the words heat, engine and/or processes:

    “For, ere Demetrius looked on Hermia’s eyne,
    He hailed down oaths that he was only mine,
    And when this hail some heat from Hermia felt,
    So he dissolved, and showers of oaths did melt.”
    —William Shakespeare (1564–1616)

    “There is a small steam engine in his brain which not only sets the cerebral mass in motion, but keeps the owner in hot water.”
    —Unknown. New York Weekly Mirror (July 5, 1845)

    “The vast results obtained by Science are won by no mystical faculties, by no mental processes other than those which are practiced by every one of us, in the humblest and meanest affairs of life. A detective policeman discovers a burglar from the marks made by his shoe, by a mental process identical with that by which Cuvier restored the extinct animals of Montmartre from fragments of their bones.”
    —Thomas Henry Huxley (1825–95)