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← ScienceWhich risk increases when a refrigeration system uses zeotropic refrigerant near its critical point?
A)Increased compressor power consumption greatly
B)Fractionation leads to composition shift✓
C)Expansion valve blockages from crystal formation
D)Oil viscosity diminishes rapidly
💡 Explanation
Fractionation risk increases because zeotropic refrigerants undergo phase separation, changing composition upon leakage; therefore performance degrades, rather than other failures, because of shifted vapor pressures at this composition.
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