High subcooling indicates which condition of the condenser's refrigerant charge?

High subcooling indicates which condition of the condenser's refrigerant charge?

• A. High refrigerant in condenser
• B. Low refrigerant in condenser
• C. High refrigerant in evaporator
• D. Normal refrigerant in condenser

Answer: (A)

Subcooling is the amount by which the liquid refrigerant in the condenser is cooled below the saturated temperature at the condenser pressure. When there is more liquid refrigerant in the system than needed, the condenser has extra liquid to cool, and more of it can be cooled below its saturation temperature before it leaves as liquid. That extra cooling shows up as a higher subcooling value. So a high subcooling indicates an overcharged condenser—there’s too much refrigerant in the condenser circuit. If the charge were low, subcooling would be lower, and normal charge would yield normal subcooling. Charge in the evaporator affects different aspects of the cycle, such as evaporation and superheat, but not the condenser outlet subcooling in the same way.

Subcooling is the amount by which the liquid refrigerant in the condenser is cooled below the saturated temperature at the condenser pressure. When there is more liquid refrigerant in the system than needed, the condenser has extra liquid to cool, and more of it can be cooled below its saturation temperature before it leaves as liquid. That extra cooling shows up as a higher subcooling value. So a high subcooling indicates an overcharged condenser—there’s too much refrigerant in the condenser circuit. If the charge were low, subcooling would be lower, and normal charge would yield normal subcooling. Charge in the evaporator affects different aspects of the cycle, such as evaporation and superheat, but not the condenser outlet subcooling in the same way.