Chapter hvac engineering Fundamentals: Part 1 Introduction

478
Chapter Nineteen
Figure 19.3
Mixing of two airstreams.
Figure 19.4
Sensible heating and cooling.
Engineering Fundamentals: Part 4
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Engineering Fundamentals: Part 4
479
Figure 19.5
Cooling and dehumidifying.
19.5.3
Cooling and dehumidifying
Most refrigerated cooling processes also include dehumidification (Fig.
19.5). The process is shown as a straight line sloping down and to the
left from the initial state point. As discussed in Sec. 9.7.2, the real
process involves sensible cooling to saturation, then further cooling
down the saturation curve to an apparatus dew point (ADP). Some air
is ‘‘bypassed’’ through the cooling coil without being cooled. The final
state point is therefore a mixture of the initial state and the ADP
state, usually very close to the ADP.