L4 Heat & Air - Thermal performance of buildings Flashcards
Fabric loss - Ventilation loss - Heat loss - Heat gains
1
Q
Describle Conduction
A
Conduction is the direct transfer of heat through material - Conductance is the amount of heat that passes through 1sqm of material 1m thick for 1k temperature difference between inside and outside.
2
Q
Describe Radiation
A
Radiation is the transfer of heat from one surface across a space - The rate of transfer depends on the nature of surfaces eg. absorption and reflectance.
3
Q
Describe Convection
A
Convection is the transfer of heat through air movement - The change of density causes convection currents which can transfer heat to or from surfaces