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Which risk increases when a geothermal turbine using isobutane exceeds its maximum vaporization temperature?

A)Loss of turbine blade strength
B)Reduced system efficiency
C)Isobutane compressor cavitation
D)Heat exchanger calcification

💡 Explanation

Exceeding the maximum vaporization temperature increases superheat, changing the isobutane phase. This causes a drastic volume change during liquid compression due to cavitation; therefore, compressor efficiency plummets, rather than just gradual heat transfer loss because of calcification.

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