BCIT Citations Collection

: Development and benchmarking of a new hygrothermal model; Proceedings of 11th International Conference on Durability of Building Materials and Components: 11 May 2008, Istanbul, Turkey. This paper presents a new hygrothermal model (HAMFit) for simulating the transport of heat, air and moisture across building envelopes. The model is based on partial differential equations solved simultaneously for air velocity, temperature, and moisture distributions for given interior and exterior conditions using finite-element-based commercial software called COMSOL Multiphysics and MatLab. The model is benchmarked using internationally-published numerical model test cases., Conference paper, Published. A version of this document is published in: 11th International Conference on Durability of Building Materials and Components, Istanbul, Turkey, May 11-14, 2008, pp. 1-8.

: Hygrothermal modeling of aerated concrete wall and comparison with field experiment; Proceedings of 3rd International Building Physics Conference: 27 August 2006, Montreal, QC. A two-dimensional heat, air and moisture transport model called hygIRC is adapted to simulate a well-documented field exposure of an aerated concrete wall section. Difficulties are encountered due to a few missing information on boundary conditions of the exposure and hygrothermal properties of aerated con-crete. The paper presents how these inadequacies were overcome to simulate the hygrothermal behavior of the wall section. Appropriate assumptions were made due to justifiable reasons. Then the model provides temporal and spatial distributions of temperature and relative humidity for an extended period that are in ex-cellent agreement with the documented field data. The paper presents the justifications for the assumptions and the comparison of experimental and simulation results., Conference paper, Published. A version of this document is published in: 3rd International Building Physics Conference, Montreal, QC., August 27, 2006, pp. 321-328.

: Simulation of wind-driven rain effects on the performance of a stucco-clad wall; Thermal Performance of Exterior Envelopes of Whole Buildings X International Conference, Clearwater Beach, Florida, USA, December 02, 2007. This climate sensitivity study studied the effects of wind-driven rain on a stucco-clad wall using the advanced hygrothermal model, hygIRC. Simulations were made for a number of climatic conditions based on the moisture index (MI) and for amounts of water deposited inside a wall. The moisture index was based on the severity of a given climate in respect to wall assemblies and the degree of wetting and drying to which a wall could potentially be subjected. The failure criteria was the concurrent occurrence of temperature and relative humidity above thresholds of 10oC and 95% respectively, for ninety consecutive days at any location of wood-based material in the wall., Conference paper, Published. A version of this document is published in: Thermal Performance of Exterior Envelopes of Whole Buildings X International Conference, Clearwater Beach, FL., Dec. 2-7, 2007, pp. 1-15.

: Thermostat setback effect in whole building performance; Proceedings of Building Physics Symposium: 29 October 2008, Leuven, Belgium. This paper describes the use of a whole building hygrothermal model (HAMFitPlus) to analyze the energy savings resulting from three programmable thermostat setting schemes in a real occupied residential house. It discusses the effect of these schemes on the indoor relative humidity and moisture performance. In the first thermostat-setting scheme, the indoor temperature is maintained constant at 21 at all time (no set-back). In the second thermostat-setting scheme, the indoor temperature is maintained at 21ºC from 7:00 to 21:00 h, and then setback to 17ºC for the remaining hours (21:00 to 7:00 h)., Conference paper, Published. A version of this document is published in: Building Physics Symposium, Lueven, Belgium, October 29-31, 2008, pp. 1-5.

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