Relationship Between Dynamic Thermal Properties, Energy Consumption and Comfort with Different Building Envelopes in a Canadian Building
An office building located in Quebec City (Canada) with different envelope assemblies has been simulated in order to determine the energy consumption and thermal comfort that they provide. The resistance, thermal mass, and materials (concrete, cross-laminated timbers (CLT), and light-frame) are varied in a series of 164 different scenarios and the energy intensities for heating and cooling determined in each case, along with the discomfort index. Results show that the materiel used to provide thermal mass has a larger impact on comfort and energy consumption than the value of the thermal mass thickness itself. It was also attempted to correlate the performance of the envelope and its thermal mass with three dynamic thermal properties (i.e., dynamic transmittance, areal heat capacity, and decrement factor). Apart from thermal resistance, the internal areal heat capacity appeared to be the most important variable to explain variations of performance of the envelope.