METEO 300 Lecture Notes - Lecture 25: Adiabatic Process, Carnot Cycle, Thermal Efficiency

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Me 300 - lecture 25 - reversible (carnot) cycle continued. Irreversible: addition of friction to expansion/compression or any other irreversibility. *the system does not return to its initial state because entropy increases due to irreversibility: > 0. Cannot say whether is > 0 or < 0. An ideal heat engine runs a reversible carnot cycle, operating between two reservoirs at = 900 k and = 300 k. the heat added is 6 kj. Determine the thermal efficiency, the net work produced, the heat rejected, and the entropy change of each process in the cycle. Is the adiabatic expansion of superheated steam from t=900 k and p= 2. 0 mpa to. We have to check whether this process is possible by both the first law (energy point of view) and second law (entropy point of view). The process is adiabatic so there is no heat transfer: = 0. Expansion means that work is being done by the system, so < 0.

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