According to the main purpose of design strategies of the Med in Italy house, the improvement of thermal capacity across envelope elements has been investigated. The main strategy included an increased mass across walls respecting the lightness of structures typical of wood technologies. Therefore some alternative strategies have been investigated starting from a uniform mass distribution. The use of sand as thermal mass represented a big challenge to analyse different mass typologies. First of all, sand has been analysed as a uniform mass included within a special frame structure. In this case mass exchanges heat only by the main surface of inner layers. During a second phase, sand has been inserted in different cases (trying to find the most suitable shape for assembling and handling). This solution reduced the total weight of structures (up to 10% less) but, by a ventilation of the mass itself, increased the surface exchanging heat. So, as experiments in climatic chamber demonstrated, it has been possible to strongly increase the whole thermal capacity of walls (at least up to 10 %).
Timber frame wall with enhanced energy performance - The Solar Decathlon Europe experience
Girasoli , Maria Teresa;
2012
Abstract
According to the main purpose of design strategies of the Med in Italy house, the improvement of thermal capacity across envelope elements has been investigated. The main strategy included an increased mass across walls respecting the lightness of structures typical of wood technologies. Therefore some alternative strategies have been investigated starting from a uniform mass distribution. The use of sand as thermal mass represented a big challenge to analyse different mass typologies. First of all, sand has been analysed as a uniform mass included within a special frame structure. In this case mass exchanges heat only by the main surface of inner layers. During a second phase, sand has been inserted in different cases (trying to find the most suitable shape for assembling and handling). This solution reduced the total weight of structures (up to 10% less) but, by a ventilation of the mass itself, increased the surface exchanging heat. So, as experiments in climatic chamber demonstrated, it has been possible to strongly increase the whole thermal capacity of walls (at least up to 10 %).I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
