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← TechnologyWhich mechanism causes decreased heat absorption in an HVAC evaporator during refrigerant undercharging?
A)Vapor compression phase change
B)Reduced convective heat transfer
C)Increased refrigerant superheating✓
D)Liquid line subcooling limitation
💡 Explanation
Increased refrigerant superheating causes decreased heat absorption because the refrigerant absorbs less latent heat during evaporation; therefore, superheated vapor enters the compressor rather than saturated vapor, rather than optimal phase balancing.
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