Referring the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature below the dew point temperature, and this results in sensible heat loss and dehumidification. What statement represents the direction of the air conditioning process line? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Question

Referring the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature below the dew point temperature, and this results in sensible heat loss and dehumidification. What statement represents the direction of the air conditioning process line? GS-RA-22

Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option A: The air conditioning process line is diagonal with the coil outlet to the left and below the coil inlet.. When cooling air below the dew point, both sensible heat and moisture are removed. This process follows a diagonal path on the psychrometric chart, moving downward and to the left. The air state moves toward the saturation curve as water vapor condenses out of the air stream during the cooling process.