David Blum is a Postdoctoral Fellow in the Building Technology and Urban Systems Division.  His research focuses on the development and implementation of next-generation computational tools for buildings operating in isolation or within broader energy networks.  The majority of this work is applied to model predictive control (MPC), where a model of building performance can be used to optimize its energy consumption, occupant service, and energy network interactions.
David received his B.A.E degree from the Department of Architectural Engineering at The Pennsylvania State University in 2011 and his M.S. and PhD degrees in Building Technology from the Massachusetts Institute of Technology in 2013 and 2016 respectively.  At MIT, his research focused on improving the use of commercial building HVAC systems to provide ancillary services to electric grids through dynamic modeling and MPC.  He is a member of the American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) and the Institute for Electrical and Electronics Engineers (IEEE).

Dr. Yixing Chen is a Senior Scientific Engineering Associate with the Building Technology and Urban Systems Division. He currently focuses on urban system researches, including 3D city data models, city data analytics, and urban scale building energy modeling and retrofit analysis. He is the Lead Developer of the City Building Energy Saver (CityBES), a web-based platform to support the urban system researches. He also let the development of Commercial Building Energy Saver (CBES), a web-based tool for energy benchmarking, electric load shape analysis, and preliminary and detailed retrofit analysis using OpenStudio and EnergyPlus simulations. He also works on occupant behavior research to evaluate the impacts of occupant behaviors on building energy performance.

He received Ph.D. from Syracuse University, USA. He got his M.S. in the Department of Building Science from National University of Singapore, and his B.S degree in Building Science Department from Tsinghua University in China.


City Building Energy Saver (CityBES),

Commercial Building Energy Saver (CBES),

Commercial Building Energy Saver Pro,

Occupancy Simulator,

Occupant Behavior Functional Mockup Unit (obFMU),

Occupant Behavior XML (obXML),

Simona D’Oca is an Italian architect and PhD Candidate at the Energy Department Polytechnic of Turin. She is currently a visiting scholar at Lawrence Berkeley National Lab, collaborating within the Energy Technologies Area in the Building Technology and Urban Systems Department. Simona has a background in the sphere of sustainable architecture and she strongly believes in the power of the human factor on the energy saving potential of smart and sustainable building and communities. In this context, she raised pivotal attention in her researches towards the understanding of the leverage of energy related occupant behavior on building energy performance. She developed expertise in data mining and statistical analysis, building energy simulations, occupancy models, meter-based feedback behavioral programs and familiarity with social, psychological, economic aspects of consumer energy behaviour. Her researches aim to uncover best practices to support energy modelers and decision makers on how to incorporate patterns of human actions and motivations into behavioral models for bridging the gap between predicted and actual energy performance in buildings.

Philip Haves is the Leader of the Simulation Research Group. He has worked on different aspects of commercial buildings since 1986, with particular interests in simulation and in building operations. He is a Fellow of ASHRAE, the chair of its Technical Committee on Energy Calculations and a former Chair of its Technical Committee on Building Operation Dynamics. He is the immediate past president of IBPSA-USA, the US affiliate of the International Building Performance Simulation Association. He has a BA in Physics from Oxford University and a PhD in Radio Astronomy from Manchester University.

Projects: EnergyPlus

Dr. Tianzhen Hong is a Staff Scientist, Principal Investigator, and Deputy Head of the Building Technology Department. He is a registered mechanical engineer in California and a LEED accredited professional. He leads a research team working on a portfolio of projects, focusing on data, methods, modeling and simulation tools, and policy for design and operation of low energy buildings and sustainable urban systems. He is leading the EnergyPlus development at LBNL, was the chief developer and product manager of VisualDOE version 4.0 (a GUI to DOE-2.1E), and was the founding developer of DeST (a building energy modeling program widely used in China). He was a key member of the teams that developed building energy standards for California, ASHRAE and India. He established and chairs the ASHRAE Multidisciplinary Task Group on occupant behavior in buildings. He is an IBPSA Fellow and a former director of IBPSA-USA board. He is an editor of Energy and Buildings, and an editorial board member of Building and Environment, and Building Simulation. He actively contributed to international collaborations such as the U.S.-China Clean Energy Research Center on Building Energy Efficiency, IEA EBC Annex 21 and 53, and is an Operating Agent of the IEA EBC Annex 66: Definition and Simulation of Occupant Behavior in Buildings. He received B.Eng. and Ph.D. in HVACR, and B.Sc. in Applied Mathematics from Tsinghua University, China.

Occupant behavior research,

City Building Energy Saver (CityBES),
Commercial Building Energy Saver,
Occupancy Simulator,
IEA EBC Annex 66,

Projects: Modelica, EnergyPlus

Jianjun Hu is Principal Scientific Engineering Associate in Simulation Research Group of Building Technology and Urban Systems Division. His major focus is the development of open platform tool for designing building control and system commissioning. He is also playing major role on developing next generation of EnergyPlus. Before joining LBNL in Feb., 2017, Jianjun was a Senior Research Engineer in United Technologies Research Center (China), in where, he acted as principal investigator of projects associated with super tall building airflow management, like stack effect mitigation, smoke control and wind effects on HVAC system. At there, he also worked on developing virtual building test bed on Dymola platform.

Jianjun received PhD degree in Civil Engineering from Purdue University in August 2014. His PhD research focused on applying model predictive control strategies on buildings with mixed-mode cooling, to minimize HVAC energy usage while ensuring occupant thermal comfort through dynamic modeling and strategy optimization. Prior to the PhD program, he was a two-years visiting researcher in School of Mechanical Engineering of Purdue, and investigated the algorithms for fast fluid dynamic simulation in building. He received master and bachelor degree from University of South China in 2006 and 2003 respectively.

Jianjun is associate member of the American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE). He is also member of International Building Performance Simulation Association – USA (IBPSA-USA).

Jared Langevin is a Research Scientist at Lawrence Berkeley National Laboratory, where he works on modeling the national and regional-scale impacts of building energy efficiency technology adoption. Based in Washington, D.C., Jared was previously a Science and Technology Policy Fellow at the U.S. Department of Energy’s Building Technologies Office (BTO), where he co-created BTO’s Scout program for energy impact analysis. Jared holds a Ph.D. in Architectural Engineering from Drexel University, where his research focused on measuring and modeling the adaptive interactions between building occupants and their surrounding thermal environments, examining the links between these interactions and building energy use outcomes. Before entering into his graduate studies at Drexel, Jared received a Bachelor’s degree in Architecture from Carnegie Mellon University.

Sang Hoon Lee is a senior scientific engineering associate in the Building Technology and Urban Systems Division. He received a Ph.D. in Building Technology and M.S. in Integrated Facility Management from the Georgia Institute of Technology. He is a LEED accredited professional with USGBC and a Facility Management Professional with IFMA. His current work focuses on the building energy simulation and modeling method in different fidelities and for diverse needs. Prior to joining LBNL, he worked at the Georgia Institute of Technology for developing energy modeling methods that are implemented in tools such as Energy Performance Standard Calculation Toolkit for easy use by building owners, architects, and engineers and Network Energy Performance Toolkit for campus-scale energy evaluation.

Thierry Stephane Nouidui is a Principal Scientific Engineering Associate in the Simulation Research Group. His current research is focused on developing building performance simulation tools and co-simulation. Thierry received a Ph.D in Building Physics from the University of Stuttgart in Germany and a M.S. in Electrical Engineering from the University of Kiel in Germany. In his Dissertation, he developed a building physics library for simulation and analysis of the hygrothermal behaviour of buildings. Prior to joining the Simulation Research Group, he worked as research engineer at Fraunhofer Institute for Building Physics in Holzkirchen in Germany. He is member of the International Building Performance Simulation Association (IBPSA).

Xiufeng Pang is a Sr. Scientific Engineer Associate in the Simulation Research Group. His research focuses on applying performance monitoring and automated diagnostic methods to improve the performance of commercial buildings. Prior to joining LBNL, he worked as a Sr. Project Engineer in a consultant firm to conduct research on building energy efficiency technologies and lead the building energy efficiency retrofit projects. He earned his PhD at the University of Nebraska at Lincoln, where he led 4 building energy efficiency retrofit projects, supervised 7 projects and conducted more than 15 building energy audits with overall measured energy savings greater than 20%. He is an associate member of ASHRAE and member of ASME.

Projects: Modelica, EnergyPlus

Rebecca Zarin Pass is a postdoctoral fellow in the Building Technology and Urban Systems Division. Her research focuses on optimizing the thermodynamic performance of energy-intensive infrastructure. She is currently examining efficiency opportunities associated with networking buildings at the urban scale. This is largely centered on analysis, design, and implementation of novel district thermal systems. She is also involved in work on urban water management and innovative desalination technologies.
Dr. Zarin Pass received her Ph.D. from the Advanced Energy Systems Laboratory in Mechanical Engineering at Stanford University. Her work there focused on developing maximum-efficiency architectures for steady-flow chemical engines. She simultaneously earned a PhD minor in Computational Mathematics in Engineering. Prior to her PhD, she received a B.S. in Earth Systems and a M.S. in Mechanical Engineering from Stanford University.

Kaiyu Sun is a Scientific Engineering Associate in the Building Technology and Urban Systems Division at Lawrence Berkeley National Laboratory. She received her M.S. in Building Technology Department from Tsinghua University. Her current work focuses on energy modeling with EnergyPlus and OpenStudio, automatic model calibration, development of OpenStudio measures, development of Variable Refrigerant Flow system model in EnergyPlus and occupant behavior research.

Michael Wetter is a Computational Scientist in the Simulation Research Group. His research includes integrating building performance simulation tools into the research process, as well as their use for design and operation of buildings. He did his dissertation at the University of California at Berkeley and at LBNL, where he created the GenOpt optimization program and the BuildOpt building simulation program and where he developed the first building energy optimization technique that provably converges to the optimal building design. He created various software for building energy simulation and optimization, including the Building Controls Virtual Test Bed, the Modelica Buildings library, and the GenOpt optimization program. He is a recipient of the Outstanding Young Contributor Award of the International Building Performance Simulation Association (IBPSA), the president of IBPSA-USA, a member of the board of directors of IBPSA, and a member of ASHRAE.