Modeling of Heat Transfer in Rooms in the Modelica "Buildings" Library
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division, Michael Wetter, Building Technologies Office (EE-5B) USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wangda Zuo, Thierry Stephane Nouidui · 2011
This paper describes the implementation of the room heat transfer model in the free open-source Modelica \Buildings" library. The model can be used as a single room or to compose a multizone building model. We discuss how the model is decomposed into submodels for the individual heat transfer phenomena. We also discuss the main physical assumptions. The room model can be parameterized to use different modeling assumptions, leading to linear or non-linear differential algebraic systems of equations. We present numerical experiments that show how these assumptions affect computing time and accuracy for selected cases of the ANSI/ASHRAE Standard 140- 2007 envelop validation tests.