@article {60352, title = {Modelica Buildings Library}, year = {2015}, author = {Michael Wetter and Wangda Zuo and Thierry Stephane Nouidui and Xiufeng Pang} } @proceedings {57000, title = {Functional Mock-Up Unit Import in EnergyPlus For Co-Simulation}, journal = {13th Conference of International Building Performance Simulation}, year = {2013}, month = {08/2013}, address = {Chambery, France}, abstract = {

This paper describes how to use the recently implemented Functional Mock-up Unit (FMU) for co-simulation import interface in EnergyPlus to link EnergyPlus with simulation tools packaged as FMUs. The interface complies with the Functional Mock-up Interface (FMI) for co-simulation standard version 1.0, which is an open standard designed to enable links between different simulation tools that are packaged as FMUs. This article starts with an introduction of the FMI and FMU concepts. We then discuss the implementation of the FMU import interface in EnergyPlus. After that, we present two use cases. The first use case is to model a HVAC system in Modelica, export it as an FMU, and link it to a room model in EnergyPlus. The second use case is an extension of the first case where a shading controller is modeled in Modelica, exported as an FMU, and used in the EnergyPlus room model to control the shading device of one of its windows. In both cases, the FMUs are imported into EnergyPlus which models the building envelope and manages the data-exchange between the envelope and the systems in the FMUs during run-time.

}, author = {Thierry Stephane Nouidui and Michael Wetter and Wangda Zuo} } @article {2581, title = {Reduction of numerical viscosity in FFD model}, journal = {Engineering Applications of Computational Fluid Mechanics}, volume = {6}, year = {2012}, pages = {234-247}, author = {Wangda Zuo and Mingang Jin and Qingyan Chen} } @proceedings {3408, title = {Validation and Application of the Room Model of the Modelica Buildings Library}, journal = {Proc. of the 9th International Modelica Conference}, year = {2012}, month = {09/2012}, address = {Munich, Germany}, abstract = {

The Modelica Buildings library contains a package with a model for a thermal zone that computes heat transfer through the building envelope and within a room. It considers various heat transfer phenomena of a room, including conduction, convection, short-wave and long-wave radiation. The first part of this paper describes the physical phenomena considered in the room model. The second part validates the room model by using a standard test suite provided by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). The third part focuses on an application where the room model is used for simulation-based controls of a window shading device to reduce building energy consumption.

}, author = {Thierry Stephane Nouidui and Phalak, Kaustubh and Wangda Zuo and Michael Wetter} } @article {3182, title = {Validation of the Window Model of the Modelica Buildings Library}, year = {2012}, month = {07/2012}, abstract = {

This paper describes the validation of the window model of the free open-source Modelica Buildings library. This paper starts by describing the physical modeling assumptions of the window model. The window model can be used to calculate the thermal and angular properties of glazing systems. It can also be used for steady-state simulation of heat transfer mechanism in glazing systems. We present simulation results obtained by comparing the window model with WINDOW 6 the well established simulation tool for steady-state heat transfer in glazing systems. We also present results obtained by comparing the window model with measurements carried out in a test cell at the Lawrence Berkeley National Laboratory.

}, author = {Thierry Stephane Nouidui and Michael Wetter and Wangda Zuo} } @proceedings {3405, title = {Validation of three dimensional fast fluid dynamics for indoor airflow simulations}, journal = {the 2nd International Conference on Building Energy and Environment (COBEE2012)}, year = {2012}, pages = {1055-1062}, address = {Boulder, CO}, author = {Mingang Jin and Wangda Zuo and Qingyan Chen} } @proceedings {2783, title = {Advanced simulations of building energy and control systems with an example of chilled water plant modeling}, journal = {the 8th International Forum and Workshop on Combined Heat, Air, Moisture and Pollutant Simulations (CHAMPS 2011)}, year = {2011}, address = {Nanjing, China}, author = {Wangda Zuo and Michael Wetter} } @proceedings {2786, title = {Modeling of Heat Transfer in Rooms in the Modelica "Buildings" Library}, journal = {12th Conference of International Building Performance Ssimulation Association}, year = {2011}, month = {11/2011}, pages = {1096-1103}, address = {Sydney, Australia}, author = {Michael Wetter and Wangda Zuo and Thierry Stephane Nouidui} } @proceedings {2782, title = {Recent developments of the Modelica Buildings library for building energy and control systems}, journal = {the 8th International Modelica Conference}, year = {2011}, address = {Dresden, Germany}, abstract = {

At the Modelica 2009 conference, we introduced the Buildings library, a freely available Modelica library for building energy and control systems [16]. This paper reports the updates of the library and presents example applications for a range of heating, ventilation and air conditioning (HVAC) systems. Over the past two years, the library has been further developed. The number of HVAC components models has been doubled and various components have been revised to increase numerical robustness. The paper starts with an overview of the library architecture and a description of the main packages. To demonstrate the features of the Buildings library, applications that include multizone airow simulation as well as supervisory and local loop control of a variable air volume (VAV) system are briey described. The paper closes with a discussion of the current development.

}, keywords = {building energy systems, heating}, url = {https://www.modelica.org/events/modelica2011/Proceedings/pages/papers/12_1_ID_113_a_fv.pdf}, author = {Michael Wetter and Wangda Zuo and Thierry Stephane Nouidui} } @proceedings {2784, title = {Validation of a Fast-Fluid-Dynamics Model for Predicting Distribution of Particles with Low Stokes Number}, journal = {12th International Conference on Indoor Air Quality and Climate (Indoor Air 2011)}, year = {2011}, month = {06/2011}, address = {Austin, Texas}, abstract = {To design a healthy indoor environment, it is important to study airborne particle distribution indoors. As an intermediate model between multizone models and computational fluid dynamics (CFD), a fast fluid dynamics (FFD) model can be used to provide temporal and spatial information of particle dispersion in real time. This study evaluated the accuracy of the FFD for predicting transportation of particles with low Stokes number in a duct and in a room with mixed convection. The evaluation was to compare the numerical results calculated by the FFD with the corresponding experimental data and the results obtained by the CFD. The comparison showed that the FFD could capture major pattern of particle dispersion, which is missed in models with well-mixed assumptions. Although the FFD was less accurate than the CFD partially due to its simplification in numeric schemes, it was 53 times faster than the CFD.}, keywords = {cfd, ffd, low stokes number, particle transportation}, author = {Wangda Zuo and Qingyan Chen} } @article {212, title = {Fast and informative flow simulation in a building by using fast fluid dynamics model on graphics processing unit}, journal = {Building and Environment}, volume = {45}, year = {2010}, pages = {747-757}, author = {Wangda Zuo and Qingyan Chen} } @proceedings {216, title = {Fast simulation of smoke transport in buildings}, journal = {the 41st International HVAC\&R congress}, year = {2010}, address = {Beograd, Serbian}, author = {Wangda Zuo and Qingyan Chen} } @proceedings {217, title = {Impact of time-splitting schemes on the accuracy of FFD simulations}, journal = {the 7th International Indoor Air Quality, Ventilation and Energy Conservation in Buildings Conference (IAQVEC 2010)}, year = {2010}, pages = {55-60}, address = {Syracuse, NY}, author = {Jianjun Hu and Wangda Zuo and Qingyan Chen} } @article {211, title = {Improvements on FFD modeling by using different numerical schemes}, journal = {Numerical Heat Transfer, Part B Fundamentals}, volume = {58}, year = {2010}, pages = {1-16}, author = {Wangda Zuo and Jianjun Hu and Qingyan Chen} } @proceedings {218, title = {Improvements on the fast fluid dynamics model for indoor airflow simulation}, journal = {the 4th National Conference of IBPSA-USA (SimBuild2010)}, year = {2010}, pages = {539-546}, address = {New York, NY}, author = {Wangda Zuo and Qingyan Chen} } @article {210, title = {Simulations of air distribution in buildings by FFD on GPU}, journal = {HVAC\&R Research}, volume = {16}, year = {2010}, pages = {783-796}, author = {Wangda Zuo and Qingyan Chen} } @article {214, title = {Anisotropy invariant Reynolds stress model of turbulence (AIRSM) and its application on attached and separated wall-bounded flows}, journal = {Flow, Turbulence and Combustion}, volume = {83}, year = {2009}, month = {07/2009}, pages = {81-103}, chapter = {81}, abstract = {

Numerical predictions with a differential Reynolds stress closure, which in its original formulation explicitly takes into account possible states of turbulence on the anisotropy-invariant map, are presented. Thus the influence of anisotropy of turbulence on the modeled terms in the governing equations for the Reynolds stresses is accounted for directly. The anisotropy invariant Reynolds stress model (AIRSM) is implemented and validated in different finite-volume codes. The standard wall-function approach is employed as initial step in order to predict simple and complex wall-bounded flows undergoing large separation. Despite the use of simple wall functions, the model performed satisfactory in predicting these flows. The predictions of the AIRSM were also compared with existing Reynolds stress models and it was found that the present model results in improved convergence compared with other models. Numerical issues involved in the implementation and application of the model are also addressed.

}, keywords = {Anisotrpoy, Invariant map, Reynolds stress model, Reynolds-averaged Navier-Stokes, Separated wall-bounded flow, Turbulence, Turbulence modeling}, issn = {1573-1987}, doi = {10.1007/s10494-008-9190-y}, author = {V. Kumar and Bettina Frohnapfel and Jovan Jovanovi{\'c} and Michael Breuer and Wangda Zuo and Ibrahim Hadzi{\'c} and Richard Lechner} } @proceedings {220, title = {Fast parallelized flow simulations on graphic processing units}, journal = {the 11th International Conference on Air Distribution in Rooms (RoomVent 2009)}, year = {2009}, address = {Busan, Korea}, author = {Wangda Zuo and Qingyan Chen} } @proceedings {219, title = {High performance computing for indoor air}, journal = {11th International IBPSA Conference (Building Simulation 2009)}, year = {2009}, pages = {244-249}, address = {Glasgow, U.K.}, author = {Wangda Zuo and Qingyan Chen} } @article {213, title = {Real time or faster-than-real-time simulation of airflow in buildings}, journal = {Indoor Air}, volume = {19}, year = {2009}, pages = {33-44}, author = {Wangda Zuo and Qingyan Chen} } @proceedings {223, title = {Computational fluid dynamics for indoor environment modeling: past, present, and future}, journal = {the 6th International Indoor Air Quality, Ventilation and Energy Conservation in Buildings Conference (IAQVEC 2007)}, year = {2007}, pages = {1-9}, address = {Sendai, Japan}, author = {Qingyan Chen and Zhao Zhang and Wangda Zuo} } @proceedings {221, title = {Real time airflow simulation in buildings}, journal = {the 6th International Indoor Air Quality, Ventilation and Energy Conservation in Buildings Conference (IAQVEC 2007)}, year = {2007}, pages = {459-466}, address = {Sendai, Japan}, author = {Wangda Zuo and Qingyan Chen} } @proceedings {222, title = {Validation of fast fluid dynamics for room airflow}, journal = {the 10th International IBPSA Conference (Building Simulation 2007)}, year = {2007}, pages = {980-983}, address = {Beijing, China}, author = {Wangda Zuo and Qingyan Chen} } @article {215, title = {Updating traditional CRM system by terminal server}, journal = {Journal of Chongqing University (Natural Science Edition)}, volume = {27}, year = {2004}, pages = {94-95}, author = {Wangda Zuo and Tianyi Yang and Wenyan Zou} }