Building Technology and Urban Systems

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.
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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.

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2014

Gao, Yafeng, Jiangmin Xu, Shichao Yang, Xiaomin Tang, Quan Zhou, Jing Ge, Tengfang T. Xu, and Ronnen M. Levinson."Cool Roofs in China: Policy Review, Building Simulations, and Proof-Of-Concept Experiments."Energy Policy 74 (2014) 190-214. DOI

Xia, Jianjun, Tianzhen Hong, Qi Shen, Wei Feng, Le Yang, Piljae Im, Alison Lu, and Mahabir Bhandari."Comparison of Building Energy Use Data Between the United States and China."Energy and Buildings 78 (2014) 165-175. DOI

Hong, Tianzhen, Le Yang, David Hill, and Wei Feng."Data and Analytics to Inform Energy Retrofit of High Performance Buildings."Applied Energy 126 (2014) 90-106. DOI

Li, Cheng, and Tianzhen Hong."Revisit of Energy Use and Technologies of High Performance Buildings."2014 ASHRAE Annual Conference (2014).

Turner, William J. N., and Tianzhen Hong."A Technical Framework to Describe Occupant Behavior for Building Energy Simulations." (2014).

2013

Hong, Tianzhen, Wen-Kuei Chang, and Hung-Wen Lin."A Fresh Look at Weather Impact on Peak Electricity Demand and Energy Use of Buildings Using 30-Year Actual Weather Data."Applied Energy 111 (2013) 333-350. DOI

Zhu, Dandan, Tianzhen Hong, Da Yan, and Chuang Wang."A Detailed Loads Comparison of Three Building Energy Modeling Programs: EnergyPlus, DeST and DOE-2.1E."Building Simulation 6.3 (2013) 323-335. DOI

Hong, Tianzhen, Wei Feng, Alison Lu, Jianjun Xia, Le Yang, Qi Shen, Piljae Im, and Mahabir Bhandari."Building Energy Monitoring and Analysis." (2013).

Chang, Wen-Kuei, and Tianzhen Hong."Statistical Analysis and Modeling of Occupancy Patterns in Open-Plan Offices using Measured Lighting-Switch Data."Building Simulation 6.1 (2013) 23–32. DOI

Hong, Tianzhen, and Hung-Wen Lin."Occupant Behavior: Impact on Energy Use of Private Offices."ASim 2012 - 1st Asia Conference of International Building Performance Simulation Association (2013).

Zhou, Xin, Da Yan, Xiaoxin Ren, and Tianzhen Hong."Data Analysis and Modeling of Lighting Energy Use in Large Office Buildings." (2013).

2012

Lin, Hung-Wen, and Tianzhen Hong."An In-Depth Analysis of Space Heating Energy Use in Office Buildings."ACEEE 2012 Summer Study (2012).