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← ScienceWhich outcome occurs when a geothermal heat engine’s turbine inlet temperature decreases?
A)Carnot efficiency decreases substantially✓
B)Exhaust plume visibility is reduced
C)Turbine blade erosion decreases mildly
D)Scaling rates in pipes decline
💡 Explanation
Carnot efficiency depends directly on the temperature difference driving a heat engine; decreased inlet temperature reduces ΔT. Therefore, the Carnot efficiency sharply drops because efficiency improvements depend on maximized temperature difference, rather than plume/erosion/scaling effects which are impacted by material and chemistry.
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