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Transcript of Stirling Engines - mragheb.commragheb.com/NPRE 498ES Energy Storage Systems/John Seo Stirling... ·...
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Stirling Engines
John Seo
12/3/2012
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Advantages • High efficiency (Carnot efficiency)
• Does not depend on type of heat source
• Easy to build
• Quiet
• No internal combustion
• Environmental Impact (pollution)
• Reliable/Easy to maintain
• Gases remain inside
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Disadvantages
• Low specific power (power per unit mass)
• Needs warm up period (time to get heated up)
• Difficult to adjust power output (tends to be constant)
• Needs higher temperature differential for more power (heat exchanger)
• Low molecular weight gases tend to work best
• Moving parts
• Relatively expensive to build
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http://www.youtube.com/watch?v=UvrBzwBIFhM
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Applications
• Submarines
• “Stirling Coolers” (Input: mechanial work, Output: cold temperature due to reversible process)
• Space exploration probes
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References
• T. Finkelstein; A.J. Organ (2001), Chapters 2&3
• A.J. Organ (1997)
• Moran MJ, Shapiro HN. Fundamentals of Engineering Thermodynamics. 6th Ed. Hoboken, NJ: Wiley; 2008.
• http://en.wikipedia.org/wiki/Stirling_engine
• http://www.wired.com/wiredscience/2012/11/radioactive-stirling-engine-exploration/