01978nas a2200133   4500008004100000245007500041210006900116260003100185300001200216520152100228653001301749100002001762856006201782       2009                        eng d00aA Modelica-based model library for building energy and control systems0 aModelicabased model library for building energy and control syst  aGlasgow, Scotlandc07/2009  a652-6593 a<p>This paper describes an open-source library with component models for building energy and control systems that is based on Modelica, an equation-based object oriented language that is well positioned to become the standard for modeling of dynamic systems in various industrial sectors. The library is currently developed to support computational science and engineering for innovative building energy and control systems. Early applications will include controls design and analysis, rapid prototyping to support innovation of new building systems and the use of models during operation for controls, fault detection and diagnostics. This paper discusses the motivation for selecting an equation-based object-oriented language. It presents the architecture of the library and explains how base model scan be used to rapidly implement new models. To demonstrate the capability of analyzing novel energy and control systems, the paper closes with an example where we compare the dynamic performance of a conventional hydronic heating system with thermostatic radiator valves to an innovative heating system. In the new system, instead of a centralized circulation pump, each of the 18 radiators has a pump whose speed is controlled using a room temperature feedback loop, and the temperature of the boiler is controlled based on the speed of the radiator pump. All flows are computed by solving for the pressure distribution in the piping network, and the controls include continuous and discrete time controls.</p>10amodelica1 aWetter, Michael  uhttp://www.ibpsa.org/proceedings/BS2009/BS09_0652_659.pdf