About Us +
Researchers in the Building Technology & Urban Systems Division (BTUS) at Lawrence Berkeley National Laboratory develop data and technologies that increase energy efficiency and improve the health, safety and comfort of building occupants, in the United States and worldwide.

We work closely with industry partners, academics and government officials to achieve these goals, and share our research widely
Research +
We are at the forefront of cutting-edge research that redefines building technology and explores all areas of urban systems.

We have been leaders for decades in developing energy-efficient windows, improving indoor air quality, coming up with new ideas to fix the nation's electricity grid, and so much more.

Visit our research areas at the right to find out more.
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Publications +
Enjoy presentations from Building Technology & Urban systems research experts on a wide variety of topics in the areas of building energy efficiency, the electricity grid and how it relates to buildings and much more.
- Presentations
News
Tools & Guides +
Explore our tools, guidebooks and software and download for free.

We offer a variety of technologies designed to simulate and model real-world circumstances to assist in energy-saving programs and help building owners build better buildings. These tools can help calculate performance of building systems like windows and shades, help consumers and builders pick the best windows for a variety of applications and much more.

Publications

Publications By Research Area

2022

Ward, Gregory J., David Geisler-Moroder, Eleanor S. Lee, Jacob C. Jonsson, and Taoning Wang."Daylight Simulation Workflows Incorporating Measured Bidirectional Scattering Distribution Functions."Energy and Building 259 (2022).

2021

Apian-Bennewitz, Peter, Jan de Boer, Bruno Bueno, Bertrand Deroisy, Yuan Fang, David Geisler-Moroder, David Geisler-Moroder, Lars O. Grobe, Jacob C. Jonsson, Eleanor S. Lee, Zhen Tian, Taoning Wang, Gregory J. Ward, Helen Rose Wilson, and Yujie Wu."Analysis and evaluation of BSDF characterization of daylighting systems." (2021). DOI

Geisler-Moroder, David, Gregory J. Ward, Taoning Wang, and Eleanor S. Lee."Peak extraction in daylight simulations using BSDF data."IBPSA Building Simulation 2021 (2021).

Wang, Taoning, Gregory J. Ward, and Eleanor S. Lee."A Python Library for Radiance Matrix-based Simulation Control and EnergyPlus Integration."IBPSA Building Simulation 2021 (2021).

Thomson, Gregory D., Robert G. Davis, Luis L. Fernandes, and Taoning Wang."Achieving Integrated Daylighting and Electric Lighting Systems: Current State of the Art and Needed Research."Energies 14.13 (2021) 3833. DOI

Geisler-Moroder, David, Eleanor S. Lee, Gregory J. Ward, Bruno Bueno, Lars O. Grobe, Taoning Wang, Bertrand Deroisy, and Helen Rose Wilson."BSDF Generation Procedures for Daylighting Systems." (2021). DOI

2020

Gehbauer, Christoph, David Blum, Taoning Wang, and Eleanor S. Lee."An assessment of the load modifying potential of model predictive controlled dynamic facades within the California context."Energy and Buildings 210 (2020) 109762. DOI

Lee, Eleanor S., Anothai Thanachareonkit, D. Charlie Curcija, Gregory J. Ward, Taoning Wang, David Geisler-Moroder, Christoph Gehbauer, John Breshears, Luis L. Fernandes, Stephen E. Selkowitz, Robert Hart, Christian Kohler, David Blum, Jinqing Peng, and Howdy Goudey."High-Performance Integrated Window and Façade Solutions for California." (2020).

Gehbauer, Christoph, David Blum, Taoning Wang, and Eleanor S. Lee."Integrated Dynamic Facade Control with an Agent-based Architecture for Commercial Buildings." (2020).

2019

Wu, Yujie, Taoning Wang, Eleanor S. Lee, Jérôme H. Kämpf, and Jean-Louis Scartezzini."Split-pane electrochromic window control based on an embedded photometric device with real-time daylighting computing."Building and Environment 161 (2019) 106229. DOI

2018

Wang, Taoning, Gregory J. Ward, and Eleanor S. Lee."Efficient modeling of optically-complex, non-coplanar exterior shading: Validation of matrix algebraic methods."Energy and Buildings 174 (2018) 464 - 483. DOI

Lee, Eleanor S., Christoph Gehbauer, Anothai Thanachareonkit, Luis L. Fernandes, and Taoning Wang."Dual-Zone Solar Control Indoor Shade: Demonstration at the Ronald V. Dellums Federal Building and U.S. Courthouse, 1301 Clay Street, Oakland, California and the Lawrence Berkeley National Laboratory Advanced Windows Testbed, Berkeley, California." (2018).

2017

Lee, Eleanor S., Luis L. Fernandes, Taoning Wang, Stephen E. Selkowitz, Steven Mesh, Yetsuh Frank, and Richard Yancey."Demonstration of Energy Efficient Retrofits for Lighting and Daylighting in New York City Office Buildings." (2017).