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← TechnologyWhich risk increases when refrigerant flow bottlenecks within the evaporator of a cryogenic cooling system?
A)Bearing lubricant thermal decomposition
B)Compressor motor electrical arcing
C)Decreased expansion turbine efficiency✓
D)Increased internal turbine wear
💡 Explanation
Reduced vaporization due to flow restrictions causes higher liquid fraction entering the expansion turbine; this decreases isentropic efficiency because the turbine struggles efficiently to expand liquid, therefore turbine performance degrades sharply rather than electrical or lubrication damages.
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