| 词条 | Closed-cycle gas turbine |
| 释义 |
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] BackgroundThe 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most use as external combustion engines "with fuels such as bituminous coal, brown coal and blast furnace gas" but were superseded by open cycle gas turbines using clean-burning fuels (e.g. "gas or light oil"), especially in highly efficient combined cycle systems.[3] Air-based CCGT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 powerGas-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]DevelopmentClosed-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
References1. ^Nitrogen or Air Versus Helium for Nuclear Closed Cycle Gas Turbines | Atomic Insights 2. ^1 2 AN ASSESSMENT OF THE BRAYTON CYCLE FOR HIGH PERFORMANCE POWER PLANTS 3. ^1 2 3 4 {{cite book |title=Closed-Cycle Gas Turbines |last=Frutschi |first=Hans Ulrich |year=2005 |publisher=ASME Press |isbn=0-7918-0226-4 |url=http://asmedl.aip.org/ebooks/asme/asme_press/802264 |accessdate=7 December 2011}} Note: front matter (including preface and introduction; PDF link) is open access. 4. ^Thermodynamics and Propulsion: Brayton Cycle 5. ^A REVIEW OF HELIUM GAS TURBINE TECHNOLOGY FOR HIGH-TEMPERATURE GAS-COOLED REACTORS {{webarchive|url=https://web.archive.org/web/20120426035308/http://article.nuclear.or.kr/jknsfile/v39/JK0390021.pdf |date=26 April 2012 }} 6. ^{{Cite journal | last1 = Keller | first1 = C. | title = Forty years of experience on closed-cycle gas turbines | doi = 10.1016/0306-4549(78)90021-X | journal = Annals of Nuclear Energy | volume = 5 | issue = 8–10 | pages = 405–422| year = 1978 | pmid = | pmc = }} 7. ^{{cite web |url=http://www.power-eng.com/news/2012/06/07/nuclear-power-small-modular-reactors.html |title=Nuclear Power: Small modular reactors |author= |date=7 June 2012 |work=Power Engineering |accessdate=7 June 2012}} 8. ^1 {{Cite journal | last1 = McDonald | first1 = C. F. | doi = 10.1016/j.applthermaleng.2012.02.041 | title = Helium turbomachinery operating experience from gas turbine power plants and test facilities | journal = Applied Thermal Engineering | volume = 44 | pages = 108–181 | year = 2012 | pmid = | pmc = }} 9. ^ML-1 Mobile Power System: Reactor in a Box | Atomic Insights 10. ^IAEA Technical Committee Meeting on "Gas Turbine Power Conversion Systems for Modular HTGRs", 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 11. ^Introduction to Flibe Energy: [https://www.youtube.com/watch?v=6-uxvSVIGtU YouTube Video] (~20 min) and PDF of slides used 12. ^Introduction to Gas Turbines for Non-Engineers (see page 5) 13. ^V. Dostal, M.J. Driscoll, P. Hejzlar, {{Cite web |url=http://web.mit.edu/jessiek/MacData/afs.course.lockers/22/22.33/www/dostal.pdf |title=Archived copy |access-date=7 December 2011 |archive-url=https://web.archive.org/web/20101227172513/http://web.mit.edu/jessiek/MacData/afs.course.lockers/22/22.33/www/dostal.pdf# |archive-date=27 December 2010 |dead-url=yes |df=dmy-all }} MIT-ANP-Series, MIT-ANP-TR-100 (2004) 14. ^Sandia National Laboratories: Supercritical CO2-Brayton Cycle
External links
2 : Gas turbines|External combustion engines |
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