Paper Conference

Proceedings of eSim 2014: 8th Conference of IBPSA-Canada


Model Development for Tube-in-Subfloor Radiant Floor Heating and Cooling

Sébastien Brideau, Ian Beausoleil-Morrison

Abstract: Radiant floor heating and cooling have the potential to decrease energy consumption in buildings. While some building energy simulation software include models for the thermally massive embedded tubes radiant floor systems, there are no models available for lightweight tube-insubfloor systems. Tube-in-subfloor systems consist of a grooved wooden subfloor, and conductive fin. Tubes are laid in the grooves, and a floor cover is added on top. This paper discusses the development of a transient tube-in-subfloor model and its implementation in ESP-r. This tube-in-subfloor radiant floor model uses the general approach of the existing embedded tube model in ESP-r and combines an analytical model of the tube with a two dimension finite difference model of the top layers of the floor construction. The calculated heat input to the floor construction is then used as an input to the ESP-r one dimension numerical model for heat conduction through building assemblies. The tube-in-subfloor model was compared with a transient two dimension finite element analysis model. A root mean square deviation of no more than 2.15 W/m² for the tested cases was found.
Pages: 515 - 528