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Thermodynamic Cycles
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Carnot Cycle
A theoretical thermodynamic cycle proposed by Sadi Carnot. It is the most efficient cycle possible between two heat reservoirs. Consists of two isothermal processes and two adiabatic processes.
Otto Cycle
A thermodynamic cycle that describes the functioning of a typical spark ignition piston engine, such as that found in a car. Consists of two isochoric processes and two adiabatic processes.
Diesel Cycle
A thermodynamic cycle that represents the operation of a diesel engine. It involves one constant pressure process, one constant volume process, and two adiabatic processes.
Brayton Cycle
The thermodynamic cycle that describes the operation of a gas turbine engine. It consists of two isobaric processes and two adiabatic processes.
Rankine Cycle
A cycle that is the idealized model for steam power plants. It involves the heating of water to steam in a boiler, expansion through a turbine, condensation, and return to the boiler by a pump.
Stirling Cycle
A thermodynamic cycle notable for its ability to operate with external combustion. It uses isothermal expansion, isochoric cooling, isothermal compression, and isochoric heating processes.
Atkinson Cycle
An internal combustion engine cycle that allows the intake valves to close late, effectively reducing the compression ratio below the expansion ratio to provide greater efficiency.
Ericsson Cycle
A thermodynamic cycle that consists of two isothermal processes and two isobaric processes. It is similar in concept to the Stirling cycle and was invented by John Ericsson.
Regenerative Cycle
A modification of the Rankine cycle where feedwater is preheated by some of the steam tapped from the turbine, increasing the efficiency of the cycle.
Kalina Cycle
A thermodynamic cycle that uses a mixture of water and ammonia as the working fluid to achieve greater efficiency through better temperature matching during heat exchange processes.
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