ZEMCH 2015 - International Conference Proceedings | Page 588

stituted by rock wool and glass wool.

Figure 1: Materials commonly used for the insulation of the opaque envelope. From left to right: polystyrene foam (synthetic), rock wool (mineral) and wood wool (natural).
Also the air (λ = 0.026 W/mK) is often used as insulating element, by the apposition of an empty
cavity between two layers, allowing good levels of thermal insulation, with low cost of implementation.

The new eco-friendly panel in Opuntia ficus-indica
The proposed innovative panel comes from the pruning of O