Glossary
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The terms and definitions included
in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation,
Air Conditioning & Refrigeration".
To access the complete glossary please
visit ASHRAE's Bookstore.
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| thermal frequency response |
response of a
thermal system to a periodic thermal excitation expressed as a function of
frequency. Note: Thermal frequency
response usually is displayed by polar plot of amplitude attenuation and time
lag versus frequency. |
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| thermal inertia |
ability of a material,
depending on its density and specific heat, to store heat and to resist
temperature change |
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| thermal input | heating or cooling effect
delivered to a product or space |
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| thermal insulation |
material or
assembly of materials used to provide resistance to heat flow. |
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| thermal insulation finish |
material applied
to insulation to provide a smooth, even finish, to strengthen and protect the
surface, and to improve its appearance. |
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| thermal insulation system |
thermal insulation
in place, complete with accessories, vapor retarders, and facings as required
for expected performance. |
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| thermal lag |
delay in action of
the sensing element of a control device due to the time required for the
sending element to reach equilibrium with the property being controlled. See
lag. |
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| thermal lift |
difference between
evaporating and condensing temperatures and pressures. See also head. |
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| thermal output |
heating or cooling effect
put out by a source, or removed from a storage device |
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| thermal radiance |
rate of radiant
emission through unit solid angle over unit projected area of a source in a
stated angular direction from the surface (usually the normal). |
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