sy26_dec03_07hc

Sy26_dec03_07hc - Heat engine Device that transforms heat into work It requires two energy reservoirs at different temperatures An energy reservoir

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1 Heat engine Device that transforms heat into work. It requires two energy reservoirs at different temperatures An energy reservoir is a part of the environment so large wrt the system that its temperature doesn’t change as the system exchanges heat with the reservoir. All heat engines and refrigerators operate between two energy reservoirs at different temperatures T H and T C . Heat engine Device that transforms heat into work. It requires two energy reservoirs at different temperatures Thermal efficiency Second law limit η = W out Q H = what you get what you pay i i i i Carnot = 1 T C T H Car, truck, jet, and rocket engines are heat engines. So are steam engines and turbines
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2 refrigerator Device that uses work to transfer heat from a colder object to a hotter object. Coefficient of performance Second law limit K = Q C W in = what you get what you pay i i i i K K Carnot = T C T H T C reversible engine A perfectly reversible engine (a Carnot engine ) can be operated either as a heat engine or a refrigerator between the same two energy reservoirs, by reversing the cycle and with no other changes. A
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This note was uploaded on 10/30/2011 for the course PHYS 207 taught by Professor Winnokur during the Spring '06 term at Wisconsin.

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Sy26_dec03_07hc - Heat engine Device that transforms heat into work It requires two energy reservoirs at different temperatures An energy reservoir

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