Evaluation of Parameters Influencing the Moisture Buffering Potential of Hygroscopic Materials with BSim Simulations

Buildings

Xiangjin Yang¹  Hua Ge³  Paul Fazio² 

[1] MCW Consultants Ltd., 207 Queen’s Quay West Suite 615, Toronto, ON, M5J 1A7, Canada; E-Mail:;Centre for Zero Energy Building Studies (CZEBS), Department of Building, Civil and Environmental Engineering; Concordia University; 1455 de Maisonneuve Blvd. West, Montreal, QC, H3G 1M8, Canada; E-Mails:;Department of Building, Civil and Environmental Engineering; Concordia University, 1455 de Maisonneuve Blvd. West, Montreal, QC, H3G 1M8, Canada

关键词: moisture buffering;    whole building HAM simulations;    hygroscopic materials;    material properties;    building envelope;    environmental chamber;   

DOI  :  10.3390/buildings4030375

来源: mdpi

【 摘 要 】

Validated by a large-scale experimental investigation on moisture buffering (MB) effect, a whole building Heat, Air and Moisture (HAM) simulation tool, BSim, is applied to evaluate the impact of a number of parameters on the moisture buffering potential of a full-scale test room finished with hygroscopic materials. The Maximum Accumulated Moisture Buffering Value (MAMBV), developed from the moisture balance analyses in the experimental study, is used in the BSim simulation result analyses to evaluate the impact of various parameters. The parameters investigated include ventilation rates (0.5–5 ACH), types of materials (uncoated gypsum board, wood paneling, orientated strand board, aerated cellular concrete, and telephone book paper), humidity conditions of supply air, volume rates, and steady-state outdoor conditions. It is found that all these parameters have a significant impact on the moisture buffering potential except for the steady-state outdoor conditions. Two material properties, the moisture capacity and vapor permeability, determine the moisture buffering capacities of materials under different moisture generation regimes.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.