Factors influencing performance
Insulation performance is influenced by many factors the most prominent of which include:
- Thermal conductivity ("k" or "λ" value)
- Surface emissivity ("ε" value)
- Insulation thickness
- Density
- Specific heat capacity
- Thermal bridging
It
is important to note that the factors influencing performance may vary
over time as material ages or environmental conditions change.
Calculating requirements Industry standards are often rules of thumb, developed over many years, that offset many conflicting goals: what people will pay for, manufacturing cost, local climate, traditional building practices, and varying standards of comfort. Both heat transfer and layer analysis may be performed in large industrial applications, but in household situations (appliances and building insulation), air tightness is the key in reducing heat transfer due to air leakage (forced or natural convection).
Calculating requirements Industry standards are often rules of thumb, developed over many years, that offset many conflicting goals: what people will pay for, manufacturing cost, local climate, traditional building practices, and varying standards of comfort. Both heat transfer and layer analysis may be performed in large industrial applications, but in household situations (appliances and building insulation), air tightness is the key in reducing heat transfer due to air leakage (forced or natural convection).
Once
air tightness is achieved, it has often been sufficient to choose the
thickness of the insulating layer based on rules of thumb. Diminishing
returns are achieved with each successive doubling of the insulating
layer. It can be shown that for some systems, there is a minimum
insulation thickness required for an improvement to be realized. high temperatures Insulation
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