Test of thermal equivalence of resistance (R)
The thermal resistance of a material (R) is related to
its coefficient of conductivity and its thickness (applies to
traditional materials). The more it is raised, the more the material
is insulating.
To have same thermal resistance, one thus needs
different thicknesses according to materials'. The thin insulators
prove their effectiveness which is due to multi-layer technology
principle of the covers of survival used to protect from large cold or
of strong heats by the soldiers from fire, explorers polar,
mountaineers, etc...
It is known that the stone is a very bad insulator and
that to reinforce the insulation of a wall, the ideal is to use an
insulating material like the ISO 9 or the ISO 7 for example.
With end to be able to give an equivalence to our products,
we created a center of test, located in mountain at 1300 m of
altitude.
We regularly carry out tests by comparison with
traditional insulators. The results and thermal measurements of
effectiveness are given on the basis of consumption of energy in KW.
These tests are recognized by bailiff
The results obtained enable us to determine an
equivalence which is mentioned on the chart of each product.
Tables
of synthesis of the tests of comparison of consumption
|
Country cottage 1 ISO13
7 films + 6 Waddings |
Country cottage 2
Glass wool of 250 mm |
Meter origin |
2848 KW |
7954 KW |
Meter after test |
2857 KW |
7963 KW |
Consumption |
9 KW |
9 KW |
Statement Temperature |
33° C |
21° C |
Test of conductivity (λ)
We have commissioned the laboratory APPLUS + to do this test on our products.
The reports APPLUS+
Certification N° 08/32309294 ISO/13 λ=0,035
Certification N° 08/32312322 ISO/11 λ=0,033
Certification N° 07/32300788 ISO/9 λ=0,035
Certification N° 3005248M1 ISO/9 Aoustique indice global 44,8 dba
Certification N° 07/32302253 ISO CHAPE λ=0,030
Result obtained: λ = 0,035
Certifications and findings can be obtained by email or letter to the company.
Orders of magnitude of thermal conductivities of some materials
(more the result and raised, less the materials is insulating)
|
Material |
Thermal conductivity
(W·m -1 ·K -1 ) =λ
Values for a temperature of 20°C |
|
Diamond |
895-2300 |
|
Copper |
401 |
|
Aluminium (purity of 99,9%) |
237 |
|
Al-Sic |
150-200 |
|
Mild steel |
46 |
|
Marble |
2,5 |
|
Glass |
1,35 |
|
Water |
0,6 |
|
Drink pine (parallel with fibres) |
0,36 |
|
Drink pine (perpendicular to fibres) |
0,15 |
|
Tease |
0,05 |
|
Glass wool |
0,04 |
|
Expanded polystyrene * |
0,03 |
|
Air (100 kPa) **
|
0,0262 |
*
even coefficient that our
ISO 13.
**
from where importance of the
existing blades of air between the transition courses of our products.
It is also very significant to take the advice of installation to
obtain the best output.
Recall : Thermal conductivity is
a thermophysical constant characterizing the behavior of materials
during the transfer of heat by conduction. This constant appears for
example in the Fourier analysis (see
the thermal Conduction article ). It represents the heat
transferred per unit of area, in a unit of time under a variation in
temperature.
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