C compressor and T turbine assembly
w high-temperature heat exchanger
ʍ low-temperature heat exchanger
~ mechanical load, e.g. electric generator
A closed-cycle gas turbine is a turbine that uses a gas (e.g. air, nitrogen, helium, argon,[1][2] etc.) for the working fluid as part of a closed thermodynamic system. Heat is supplied from an external source.[3] Such recirculating turbines follow the Brayton cycle.[4][5]
YouTube Encyclopedic
-
1/3Views:54 24643 755185 330
-
CLOSED CYCLE-GAS TURBINE
-
Closed Cycle Gas Turbine (हिन्दी )
-
Gas turbine Working principle , Open loop and closed loop gas turbine.
Transcription
Background
The initial patent for a closed-cycle gas turbine (CCGT) was issued in 1935 and they were first used commercially in 1939.[3] Seven CCGT units were built in Switzerland and Germany by 1978.[2] Historically, CCGTs found most use as external combustion engines "with fuels such as bituminous coal, brown coal and blast furnace gas" but were superseded by open cycle gas turbines using cleaner-burning fuels (e.g. "gas or light oil"), especially in highly efficient combined cycle systems.[3] Air-based CCGT systems have demonstrated very high availability and reliability.[6] The most notable helium-based system thus far was Oberhausen 2, a 50 megawatt cogeneration plant that operated from 1975 to 1987 in Germany.[7] Compared to Europe where the technology was originally developed, CCGT is not well known in the US.[8]
Nuclear power
Gas-cooled reactors powering helium-based closed-cycle gas turbines were suggested in 1945.[8] The experimental ML-1 nuclear reactor in the early-1960s used a nitrogen-based CCGT operating at 0.9 MPa.[9] The cancelled pebble bed modular reactor was intended to be coupled with a helium CCGT.[10] Future nuclear (Generation IV reactors) may employ CCGT for power generation,[3] e.g. Flibe Energy intends to produce a liquid fluoride thorium reactor coupled with a CCGT.[11]
Development
Closed-cycle gas turbines hold promise for use with future high temperature solar power[3] and fusion power[2] generation.
They have also been proposed as a technology for use in long-term space exploration.[12]
Supercritical carbon dioxide closed-cycle gas turbines are under development; "The main advantage of the supercritical CO2 cycle is comparable efficiency with the helium Brayton cycle at significantly lower temperature" (550 °C vs. 850 °C), but with the disadvantage of higher pressure (20 MPa vs. 8 MPa).[13] Sandia National Laboratories has a goal of developing a 10 MWe supercritical CO2 demonstration CCGT by 2019.[14]
See also
References
- ^ Nitrogen or Air Versus Helium for Nuclear Closed Cycle Gas Turbines | Atomic Insights
- ^ a b c "AN ASSESSMENT OF THE BRAYTON CYCLE FOR HIGH PERFORMANCE POWER PLANTS" (PDF). Archived from the original (PDF) on 29 June 2010. Retrieved 10 June 2012.
- ^ a b c d e Frutschi, Hans Ulrich (2005). Closed-Cycle Gas Turbines. ASME Press. ISBN 0-7918-0226-4. Archived from the original on 21 December 2011. Retrieved 7 December 2011. Note: front matter (including preface and introduction; PDF link) is open access.
- ^ Thermodynamics and Propulsion: Brayton Cycle
- ^ A REVIEW OF HELIUM GAS TURBINE TECHNOLOGY FOR HIGH-TEMPERATURE GAS-COOLED REACTORS Archived 26 April 2012 at the Wayback Machine
- ^ Keller, C. (1978). "Forty years of experience on closed-cycle gas turbines". Annals of Nuclear Energy. 5 (8–10): 405–422. doi:10.1016/0306-4549(78)90021-X.
- ^ "Nuclear Power: Small modular reactors". Power Engineering. 7 June 2012. Retrieved 7 June 2012.[permanent dead link]
- ^ a b McDonald, C. F. (2012). "Helium turbomachinery operating experience from gas turbine power plants and test facilities". Applied Thermal Engineering. 44: 108–181. doi:10.1016/j.applthermaleng.2012.02.041.
- ^ "ML-1 Mobile Power System: Reactor in a Box | Atomic Insights". Archived from the original on 22 July 2012. Retrieved 6 June 2012.
- ^ IAEA Technical Committee Meeting on "Gas Turbine Power Conversion Systems for Modular HTGRs"[permanent dead link], held from 14–16 November 2000 in Palo Alto, California. International Atomic Energy Agency, Vienna (Austria). Technical Working Group on Gas-Cooled Reactors. IAEA-TECDOC--1238, pp:102-113[permanent dead link]
- ^ Introduction to Flibe Energy: YouTube Video (~20 min) and PDF Archived 5 April 2012 at the Wayback Machine of slides used
- ^ Introduction to Gas Turbines for Non-Engineers (see page 5)
- ^ V. Dostal, M.J. Driscoll, P. Hejzlar, "Archived copy" (PDF). Archived from the original (PDF) on 27 December 2010. Retrieved 7 December 2011.
{{cite web}}: CS1 maint: archived copy as title (link) MIT-ANP-Series, MIT-ANP-TR-100 (2004) - ^ Sandia National Laboratories: Supercritical CO2-Brayton Cycle
- http://www.appliedthermalfluids.com/home/brands-manufacturers/exxonmobil-aviation-jet-oils/mobil-jet-oils/[permanent dead link]
External links
- US Patent 5309492 "Control for a closed cycle gas turbine system"
- Industrial Closed-cycle Gas Turbines for Conventional and Nuclear Fuel (1967)
- Brayton Lab on YouTube (at Sandia National Laboratories, 2014)
- "Aviation Jet Oils"[permanent dead link]
This page was last edited on 18 January 2024, at 15:31