An ideal gas in a heat engine undergoes the following processes comprising a cycle in a pistoncylinder

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An ideal gas in a heat engine undergoes the following processes comprising a cycle in a piston–cylinder regenerator device:


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1–2: isothermal heating at TH from a heat source at TH,


2–3: constant-volume cooling to TL by the regenerator,


3–4: isothermal cooling at TL by a heat sink at TL, and


4–1: constant-volume heating to TH by the regenerator.


A. Determine the thermal efficiency for the heat engine by considering the work and heat flow for each process.


B. Is the heat engine reversible? Why? Explain.

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Thermodynamics Concepts And Applications

ISBN: 9781107179714

2nd Edition

Authors: Stephen R. Turns, Laura L. Pauley

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