Lec39 - ME 200: Thermodynamics I Lecture 39: Air standard...

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ME 200: Thermodynamics I Lecture 39: Air standard cycle, internal combustion engines, Otto cycle Sections 9.1, 9.2 Problems: SP39; 9.6, 9.11 1
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Reciprocating piston-cylinder engines Compression ratio Mean effective pressure ratio, mep 2
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Reciprocating Engine: The Four-Stroke Cycle 3
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max min BDC TDC VV r max min net W For an ideal cycle: Show animation 4
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Air Standard Cycle Working fluid assumed to be air only, instead of air-fuel mixture, ideal gas equations shown on next few charts Processes constituting cycle considered to be internally reversible; real processes are irreversible Combustion process replaced by heat addition from an external source Exhaust process replaced by hypothetical heat rejection process to return fluid to initial state In cold air-standard cycle , specific heats assumed to be constant 5
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Nikolaus Otto Born on 10th June 1832 in Holzhausen, Germany. 1876 : developed the first 4-stroke cycle internal combustion engine based on principles patented in 1862 by Alphonse Beau de Rochas.
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Lec39 - ME 200: Thermodynamics I Lecture 39: Air standard...

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