Brayton cycle


Also found in: Wikipedia.

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.

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

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)
References in periodicals archive ?
an innovative CSP concept whereby (i) the receiver is co-located with the TES vessel, (ii)the solar radiation is directly absorbed by the liquid storage medium, and (iii) the thermalpower is withdrawn from the TES by bubbling a gas through it, which can thus be used asworking fluid in a Brayton cycle.
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.
While many gas turbine-generators operate as simple Brayton cycle systems, they have the potential for higher generating efficiency by combining the Brayton cycle with a Rankine cycle.
Arvada, CO, is for development of a closed Brayton cycle engine that uses a high-speed turbine and compressor coupled to a rotary alternator that also generates 12 kW.
To significantly improve the performance of gas-turbine engines, researchers need to look beyond the Brayton cycle to explore alternative and possibly more innovative cycles.
The Brayton cycle is the leading power conversion system being evaluated by NASA.
The facility is intended to have three primary experimental uses: (1) Nuclear research on the fuel cycle, including research on proliferation resistant thorium-based fuels, (2) a Brayton Cycle laboratory for development of new methods to produce electricity with increased efficiencies, and (3) High-temperature process and materials laboratory.
The Cold Turbine is the use of a positive displacement Rand Cam compressor and a positive displacement Rand Cam expander in a Brayton cycle (gas turbine) machine.