Brayton cycle


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Brayton cycle

[′brāt·ən ‚sī·kəl]
(thermodynamics)
A thermodynamic cycle consisting of two constant-pressure processes interspersed with two constant-entropy processes. Also known as complete-expansion diesel cycle; Joule cycle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Brayton cycle

A thermodynamic cycle (also variously called the Joule or complete expansion diesel cycle) consisting of two constant-pressure (isobaric) processes interspersed with two reversible adiabatic (isentropic) processes.

The thermal efficiency for a given gas, air, is solely a function of the ratio of compression. This is also the case with the Otto cycle. For the diesel cycle with incomplete expansion, the thermal efficiency is lower.

The Brayton cycle, with its high inherent thermal efficiency, requires the maximum volume of gas flow for a given power output. The Otto and diesel cycles require much lower gas flow rates, but have the disadvantage of higher peak pressures and temperatures. These conflicting elements led to many designs, all attempting to achieve practical compromises. With the development of fluid acceleration devices for the compression and expansion of gases, the Brayton cycle found mechanisms which could economically handle the large volumes of working fluid. This is perfected in the gas turbine power plant. See Gas turbine, Thermodynamic cycle

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.

Brayton cycle

A name given to the thermodynamic cycle of a gas turbine engine to provide thrust. This is varying the volume constant pressure cycle of events and is commonly called the constant pressure cycle. Also called a continuous combustion cycle because of four constant and continuous events (i.e., intake, compression, expansion including power, and exhaust). It is named after George B. Brayton—an American engineer. Also called a Joule cycle. (See page 121)
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Therefore, SC[O.sub.2] Brayton Cycle is considered to be one of the most promising energy transfer and energy conversion schemes in nuclear reactors.
Closed supercritical carbon dioxide (S-C[O.sub.2]) Brayton cycle is considered as a promising substitute for steam Rankine cycle applied to thermal power generation.
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The reactor would be attached to an open air Brayton cycle power conversion system.
A nitrogen heat exchanger using a closed Brayton cycle will transfer the heat to a turbine and generator set or output it for direct use.
Approximating a thermodynamic Brayton cycle, the closed cycle gas turbine has two heat exchangers, one for rejecting heat from working fluid entering the compressor and one for energy addition to flow entering the turbine.
Sun, "Exergoeconomic performance optimization for a combined cooling, heating and power generation plant with an endoreversible closed Brayton cycle," Mathematical and Computer Modelling, vol.
In their work, solar energy is used as the only heat source to drive a closed Brayton cycle to generate power.
Burlington, MA, December 15, 2012 --(PR.com)-- Supercritical Carbon Dioxide Brayton Cycle is one of the latest advances in the development of power conversion technologies for bulk thermal and nuclear generation of electricity.
A "combined cycle power plant" is described as a combination of gas turbine generator (Brayton cycle) with turbine exhaust waste directed to heat boiler and steam turbine generator (Rankine cycle) for the production of electric power.