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← ScienceWhich operational hazard emerges when a Sterling engine runs too slowly?
A)Backflow past the displacer seal✓
B)Overcooling of the regenerator core
C)Phase change in the working fluid
D)Inefficient heat rejection by radiator
💡 Explanation
Backflow occurs because lower speeds reduce the buffer pressure differential when the working gas cycles; volumetric pumping is reduced, therefore gases leak past the imperfect displacer rings, rather than maintaining efficient forward flow.
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