The evaporation temperature of R-410A at 100 psig is about: ____ F.

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Multiple Choice

The evaporation temperature of R-410A at 100 psig is about: ____ F.

Evaporation temperature is the saturation temperature for the refrigerant at the evaporator pressure. When R-410A is evaporating, liquid boils at the pressure inside the evaporator, so the temperature at which it boils is fixed by that pressure. At about 100 psig, R-410A’s saturation temperature is roughly 30°F, so the evaporation (boiling) temperature is about 30°F. Remember that the gas leaving the evaporator is typically hotter than this due to superheat, but the boiling temperature itself sits near 30°F for that pressure. The other numbers correspond to different pressures on the R-410A PT curve and don’t match the 100 psig condition.

Evaporation temperature is the saturation temperature for the refrigerant at the evaporator pressure. When R-410A is evaporating, liquid boils at the pressure inside the evaporator, so the temperature at which it boils is fixed by that pressure. At about 100 psig, R-410A’s saturation temperature is roughly 30°F, so the evaporation (boiling) temperature is about 30°F. Remember that the gas leaving the evaporator is typically hotter than this due to superheat, but the boiling temperature itself sits near 30°F for that pressure. The other numbers correspond to different pressures on the R-410A PT curve and don’t match the 100 psig condition.

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