Staff

Philip Haves conducts research in Simulation Research. 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

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.

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).

Yixing Chen is aSenior Scientific Engineering Assoicate in the Simulation Research Group. He is currently involved in the development of EnergyPlus and a web-based retrofit toolkit for small and medium office and retail buildings, named Commercial Building Energy Saver (CBES). He got his Ph.D. in the Department of Mechanical and Aerospace Engineering from Syracuse University. His Ph.D. research focuses on the development of a modeling and simulation platform for performance-based design of low-energy and high IEQ buildings.
He received 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.

Dr. Tianzhen Hong is a Staff Scientist and Principal Investigator with the Building Technology and Urban Systems Division. He is a registered mechanical engineer in California and a LEED accredited professional. He leads a research team working on a portfolio of DOE, CEC, and industry 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 created and chairs the ASHRAE Multidisciplinary Task Group on occupant behavior in buildings. He is a member of the IBPSA-USA board of directors, an editor of Energy and Buildings, 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 currently leading 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.

Links
Occupant behavior research, http://behavior.lbl.gov
Commercial Building Energy Saver, http://cbes.lbl.gov
Occupancy Simulator, http://occupancysimulator.lbl.gov
IEA EBC Annex 66, http://annex66.org
Publications, https://www.researchgate.net/profile/Tianzhen_Hong

Projects: Modelica, EnergyPlus

Sang Hoon Lee is a Senior Scientific Engineering Associate in the Simulation Research Group. 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 development of the energy retrofit tool for small and medium business and large-scale energy modeling method. 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.

Dr. Rongpeng Zhang is a Postdoctoral Fellow in the Building Technology and Urban Systems Division at Lawrence Berkeley National Laboratory. He is an Energy Modeler and Mechanical Engineer with his primary research focusing on the energy prediction and management for smart building/urban systems, building energy/lighting/acoustic performance modeling and simulation, and advanced HVAC system control. He is a key investigator in several current projects in the lab, including EnergyPlus new feature development, advanced VRF-HR system control, modeling of HVAC operational faults, demand response quick assessment tool (DRQAT) for refrigerated warehouses, and SMB Toolkit development.
Dr. Zhang received his Ph.D. in Building Performance and Diagnostics program at Carnegie Mellon University, where his research focused on the dynamic optimization of integrated HVAC operation, and development of web-based information technology infrastructures and regulatory repositories for green building codes (iCodes). He received his B.S. and M.S. degrees in Built Environment and Facilities Engineering at Tongji University.