Cooling coil selection using apparatus dewpoint charts
Abstract This Paper presents apparatus dewpoint charts for selecting cooling and dehumidifying coiĺs in the design of air conditioning plants. The apparatus dewpoint parameter has become one of the common methods for selecting cooling coils. With the aid of a digital computer, values for the apparatus dewpoint were computed for several ambient conditions and effective sensible heat factors. The computations reveal that, for any set of ambient conditions, there is a corresponding minimum value of the effective sensible heat factor below which no unique apparatus dewpoint exists. This fact is borne out by the apparent asymptotic trend of the graphs produced.