Transient modeling of high-inertial thermal bridges in buildings using the equivalent thermal wall method

Journal ar
Applied Thermal Engineering
  • Volumen: 67
  • Número: 1-2
  • Fecha: 01 junio 2014
  • Páginas: 370-377
  • ISSN: 13594311
  • Tipo de fuente: Revista
  • DOI: 10.1016/j.applthermaleng.2014.03.058
  • Tipo de documento: Artículo
  • Editorial: Elsevier Ltd
© 2014 Elsevier Ltd. All rights reserved.The method of the equivalent thermal wall has been employed for modeling the transient response of high-inertial thermal bridges. A new strategy is presented in order to adjust the thermal properties of the equivalent three-layered wall, which takes into account the temperature distribution across the thermal bridge in a steady-state heat conduction scenario. Two different thermal bridge topologies created by the junction of a vertical wall and an intermediate or a ground floor slab are analyzed with this method, and its feasibility for the implementation in building energy simulation tools is discussed: if the thermal bridge is not considered, an underestimation of 25% in the heat flux across the bridge is predicted. If the thermal bridge is modeled but its thermal inertia is neglected, a time-delayed heat flux response is retrieved. Conversely, the simulation based on the equivalent wall method provides a response nearly identical to the actual dynamic performance of the thermal bridge.

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