Chapter hvac engineering Fundamentals: Part 1 Introduction

3.5.2
Cooling load versus instantaneous
heat gain
The internal heat gains discussed above are often greater than the
actual cooling load due to those gains. This is a result of heat storage
in the building and furnishings—anything that has mass. The effect
is shown in Fig. 3.4. The longer the heat gain persists, the more nearly
the instantaneous cooling load will approach the actual cooling load.
Cooling load factors
(CLFs) for various elements of heat gain are
shown in Tables 3.6 through 3.13, pp. 38–42. The lighting-related load
is particularly affected by the type of fixture and ventilation rate of
the air conditioning system, as indicated in Table 3.6.
The load factor criteria pages should include schedules of use and
occupancy, together with cooling load factors to be applied. See Ref. 2
for additional discussion of this topic.
Design Procedures: Part 1
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