Thermodynamic Cycle

A thermodynamic cycle consists of a collection of thermodynamic processes transferring heat and work, while varying pressure, temperature, and other state variables, eventually returning a system to its initial state. In the process of going through this cycle, the system may perform work on its surroundings, therefore acting as a heat engine.

State quantities depend only on the thermodynamic state, and cumulative variation of such properties adds up to zero during a cycle. Process quantities (or path quantities), such as heat and work are process dependent, and cumulative heat and work are non-zero. Since the change in internal energy (a state quantity) over the course of a cycle is zero, the first law of thermodynamics dictates that the net heat input is equal to the net work output over a cycle. The repeating nature of the process path allows for continuous operation, making the cycle an important concept in thermodynamics. Thermodynamic cycles are often represented mathematically as quasistatic processes to model the workings of an actual device.

Read more about Thermodynamic Cycle:  Heat and Work, Modelling Real Systems, Well-known Thermodynamic Cycles, State Functions and Entropy

Other articles related to "thermodynamic cycle, cycle, thermodynamic":

Thermodynamic Cycle - State Functions and Entropy
... If Z is a state function then the balance of Z remains unchanged during a cyclic process ... Entropy is a state function and is defined as so that , then it is clear that for any cyclic process, meaning that the net entropy change over a cycle is 0 ...
Ocean Thermal Energy Conversion - Thermodynamics - Closed Anderson Cycle
... In this cycle, QH is the heat transferred in the evaporator from the warm sea water to the working fluid ... The condensate is then compressed to the highest pressure in the cycle, requiring condensate pump work, WC ... Thus, the Anderson closed cycle is a Rankine-type cycle similar to the conventional power plant steam cycle except that in the Anderson cycle the working ...
Magnetic Refrigeration - The Magnetocaloric Effect - Thermodynamic Cycle
... The cycle is performed as a refrigeration cycle, analogous to the Carnot cycle, and can be described at a starting point whereby the chosen working substance is introduced into a magnetic field, i.e ... not lost (yet) and therefore total entropy is not reduced (according to thermodynamic laws), the net result is that the item heats up (T + ΔTad) ... Once the refrigerant and refrigerated environment are in thermal equilibrium, the cycle begins again ...
Otto Cycle
... An 'Otto cycle' is an idealized thermodynamic cycle which describes the functioning of a typical spark ignition reciprocating piston engine, the thermodynamic cycle most commonly found in automobile engines ... The Otto cycle is constructed out of TOP and BOTTOM of the loop a pair of quasi-parallel adiabatic processes LEFT and RIGHT sides of the loop a pair of ... Process 4-1 completes the cycle by a constant-volume process in which heat is rejected from the air while the piston is a bottom dead centre ...

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