Chapter hvac engineering Fundamentals: Part 1 Introduction

9.9
Evaporative Cooling
An evaporative cooling system utilizes the cooling effect of evaporating
water as the heat sink. The use of this effect in condensing refrigerant
and providing condensing water has been described. In many situa-
tions, it is possible to use evaporative cooling directly, at considerably
lower cost than that for mechanical refrigeration. Historically this is
the oldest form of air conditioning, and it has been used in the desert
areas of the world for thousands of years, for both comfort cooling and
food preservation. The canvas waterbags of an earlier generation are
an example of applied evaporative cooling.
Figure 9.28 illustrates the basic evaporative cooling process. Water
is mixed with the airstream in some manner—sprays are shown here.
Equipment: Part 1
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