Which inefficiency arises when implementing a nearly reversible Carnot engine with a finite cycle time?

💡 Explanation

When a Carnot engine operates with finite cycle time, isothermal heat transfer becomes rate-limited because temperature differences must be finitely non-zero to drive heat flow, thus reducing the efficiency. Therefore isothermal heat transfer limits power, rather than frictional, entropic, or volume constraints which may be present but are not fundamental to this context.

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