of an installation. Figure 14-3 shows the
relationship between humidity, temperature
and air movement.
SELECTION AND INSTALLATION OF
Heat transmission load. This leakage
occurs through walls, doors, ceilings, and floor
space into the space being refrigerated.
Insulation factor. This is the rate of
heat transfer that occurs through insulating
In a refrigeration system, the major
determined by the frequency with which a
consideration is the heat load calculation.
door is opened and closed and the length of
There are five general factors that affect the
time a door is left open.
refrigeration heat-load estimate required for
Product load factor. This is determined
a particular application.
by the types of products being stored and
product temperature at time of storage.
A i r c h a n g e l o a d . T h i s f a c t o r is