This research investigates the possibility to use highly absorbing materials to dampen indoor RH% variations. The practical MBV of sodium polyacrylate, cellulose-based material, perlite and gypsum is evaluated for a daily cyclic exposure that alternates high (75%) and low (33%) RH% levels for 8 h and 16 h, respectively. The adjustment velocity to RH% variations and the presence of hysteretic phenomena are also presented. The cellulose-based material proves to be the most suitable for moisture buffering applications. Starting from this material’s properties, the effect of thickness, vapour resistance factor ( m) and mass surface exchange coefficient (Zv) on sorption capacity is evaluated by the use of a numerical model.
Moisture buffering capacity of highly absorbing materials / S., Cerolini; DI PERNA, Costanzo; D'Orazio, Marco; Stazi, Alessandro. - In: ENERGY AND BUILDINGS. - ISSN 0378-7788. - 41:(2009), pp. 164-168. [10.1016/j.enbuild.2008.08.006]
Moisture buffering capacity of highly absorbing materials
DI PERNA, COSTANZO;D'ORAZIO, Marco;STAZI, ALESSANDRO
2009-01-01
Abstract
This research investigates the possibility to use highly absorbing materials to dampen indoor RH% variations. The practical MBV of sodium polyacrylate, cellulose-based material, perlite and gypsum is evaluated for a daily cyclic exposure that alternates high (75%) and low (33%) RH% levels for 8 h and 16 h, respectively. The adjustment velocity to RH% variations and the presence of hysteretic phenomena are also presented. The cellulose-based material proves to be the most suitable for moisture buffering applications. Starting from this material’s properties, the effect of thickness, vapour resistance factor ( m) and mass surface exchange coefficient (Zv) on sorption capacity is evaluated by the use of a numerical model.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
