Modeling of Heat Transfer in Rooms in the Modelica "Buildings" Library

Technical Report · Tue Nov 01 04:00:00 UTC 2011

DOI:https://doi.org/10.2172/1168737· OSTI ID:1168737

Wetter, Michael ^[1]; Zuo, Wangda ^[1]; Nouidui, Thierry Stephane ^[1]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1168737
• Report Number(s): LBNL--5563E
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION