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← ScienceWhich mechanism limits efficiency in a transcritical CO2 power cycle?
A)Irreversible heat addition near critical point✓
B)Increased turbine blade erosion in expansion
C)Formation of CO2 hydrates hindering circulation
D)Flash boiling during compression decreases density
💡 Explanation
Efficiency is limited by irreversible heat addition due to large temperature differences during CO2 heating near its critical point; this increases entropy via the mechanism of entropy generation. Therefore, irreversible heat addition limits the cycle efficiency rather than blade erosion, hydrate formation, or flash boiling, because those are different failure modes
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