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Chapter Eighteen
TABLE
18.1 Temperature Gradient Information
place, such as on inside window surfaces. To avoid problems, extra
insulation, double glazing, or surface heating may then be used.
In HVAC practice, steady-state conduction seldom, if ever, takes
place, because the outside air temperature and inside load conditions
are constantly changing. The transient heat flow effects which result
are functions of several variables, including the mass (storage effect)
of the barrier. The sensible heat gain and cooling load factors dis-
cussed in Chap. 3 are approximations which allow the designer to
compensate for these transients.
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