4. Reflective insulations

4.1 Reflective films

To increase the efficiency of insulation systems, low-emissivity (ε " 0.1) reflective films are sometimes used as surface coatings for walls or insulation.

At the wall-air interface, heat transfer by natural convection and radiation is expressed by the relationship : $| \vec{q} | = | {\vec{q}}_{c v} | + | {\vec{q}}_{r} | = (h_{c v} + h_{r}) \cdot S \cdot (T_{1} - T_{A})$

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Reflective insulations

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Economic data

The thermal insulation market

The total volume of the thermal insulation market is around 17 million cubic meters per year.

Table 1 shows the breakdown by product family as a percentage of total volume.

References

(1) - - NF P75-101. – Isolants thermiques destinés au bâtiment. Définition (1983).
(2) - - EN ISO 9229. – Isolation thermique. Matériaux, produits et systèmes. Vocabulaire (1997).
(3) - -...