Paper Conference

Proceedings of eSim 2012: 7th Conference of IBPSA-Canada


Thermal Performance of Three-Dimensional Building Envelope Assemblies and Details for Improving the Accuracy of Whole Building Performance Simulation

Christian Cianfrone, Patrick Roppel, Neil Norris, Nova Scotia

Abstract: Thermal bridging through insulating layers can greatly reduce the thermal performance of building assemblies and have a significant impact on whole-building energy performance. As such, determining the effects of thermal bridging is often of importance to energy modelers, building engineers and architects in accurately designing and assessing the performance of buildings. This, however, can be very difficult to accomplish using common approaches, such as the area-weighted average of U-values, especially when dealing with three dimensional heat flow paths. In ASHRAE Research Project 1365 (1365-RP), a methodology was developed, using a calibrated 3D model, that enables designers to consider all thermal bridging in a simple and practical manner. This approach can improve the accuracy of whole building performance simulations where complex thermal bridging is often ignored. This paper will provide an overview of 1365-RP and its potential impact on energy simulation. These impacts on whole building energy performance will be examined for various building and construction types, and climate zones.
Pages: 585 - 600