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

2001

Ehrlich, Charles K., Konstantinos M. Papamichael, Judy Lai, and Kenneth L. Revzan."Simulating the Operation of Photosensor-Based Lighting Controls."2001 Building Simulation 7th International Building Performance Simulation Association Conference (2001).

Ehrlich, Charles K., Konstantinos M. Papamichael, Judy Lai, and Kenneth L. Revzan."A Method for Simulating the Performance of Photosensor-Based Lighting Controls."Energy and Buildings 34 (2001) 883-889.

1997

Papamichael, Konstantinos M., John LaPorta, and Hannah L. Chauvet."Building Design Advisor: Automated Integration of Multiple Simulation Tools."Automation in Construction 6.4 (1997) 341-352. DOI

1996

Papamichael, Konstantinos M., John LaPorta, Hannah L. Chauvet, Deirdre Collins, Thomas Trzcinski, Jack A. Thorpe, and Stephen E. Selkowitz."The Building Design Advisor."ACADIA 1996 Conference (1996).

Papamichael, Konstantinos M., Charles K. Ehrlich, and Gregory J. Ward."Design and Evaluation of Daylighting Applications of Holographic Glazings." (1996).

1994

Beltran, Liliana O., Eleanor S. Lee, Konstantinos M. Papamichael, and Stephen E. Selkowitz."The Design and Evaluation of Three Advanced Daylighting Systems: Light Shelves, Light Pipes and Skylights."Solar 94, Golden Opportunities for Solar Prosperity (1994).

Sullivan, Robert, Eleanor S. Lee, Konstantinos M. Papamichael, Michael D. Rubin, and Stephen E. Selkowitz."Effect of Switching Control Strategies on the Energy Performance of Electrochromic Windows."SPIE International Symposium on Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, April 18-22, 1994 (1994).

Papamichael, Konstantinos M., Liliana O. Beltran, Reto A. Furler, Eleanor S. Lee, Stephen E. Selkowitz, and Michael D. Rubin."Simulating the Energy Performance of Holographic Glazings."13th SPIE International Symposium on Optical Materials Technology for Energy Efficiency and Solar Energy Conversion (1994).

1993

Papamichael, Konstantinos M., Liliana O. Beltran, Reto A. Furler, Eleanor S. Lee, Stephen E. Selkowitz, and Michael D. Rubin."The Energy Performance of Prototype Holographic Glazings." (1993).

Papamichael, Konstantinos M., and Liliana O. Beltran."Simulating the Daylight Performance of Fenestration Systems and Spaces of Arbitrary Complexity: The IDC Method."3rd International Conference of the International Building Performance Simulation Association, Building Simulation 93 (1993).

1992

Selkowitz, Stephen E., Liliana O. Beltran, Werner K.E. Osterhaus, Konstantinos M. Papamichael, Jennifer E. Schuman, Robert Sullivan, and Michael Wilde."Building Performance Analysis Using Interactive Multimedia Concepts."1992 ACEEE Summer Study on Energy Efficiency in Buildings (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Daylighting Optical Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Dynamic Curtain Wall Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Glazing Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Lighting Systems." (1992).

Schuman, Jennifer E., Francis M. Rubinstein, Konstantinos M. Papamichael, Liliana O. Beltran, Eleanor S. Lee, and Stephen E. Selkowitz."Technology Reviews: Shading Systems." (1992).

1990

Papamichael, Konstantinos M.."Fenestration Systems as Luminaires of Varying Candle Power Distribution."1990 IEEE Industry Applications Society Annual Meeting, October 7-12, 1990 2 (1990). DOI

1988

Papamichael, Konstantinos M., Joseph H. Klems, and Stephen E. Selkowitz."Determination and Application of Bidirectional Solar-Optical Properties of Fenestration Systems."13th National Passive Solar Conference (1988).

Sullivan, Robert, Dariush K. Arasteh, Konstantinos M. Papamichael, Jong-Jin Kim, Russell Johnson, Stephen E. Selkowitz, and Ross McCluney."An Indices Approach for Evaluating the Performance of Fenestration Systems in Nonresidential Buildings."ASHRAE Transactions 94 (1988).

1987

Papamichael, Konstantinos M., and Stephen E. Selkowitz."Simulating the Luminous and Thermal Performance of Fenestration Systems."Lighting Design + Application (1987).

1986

Selkowitz, Stephen E., Konstantinos M. Papamichael, and Michael Wilde."A Concept for an Advanced Computer-Based Building Envelope Design Tool."International Daylighting Conference Proceedings (1986).

Kim, Jong-Jin, Konstantinos M. Papamichael, Stephen E. Selkowitz, Mark Spitzglas, and Michael F. Modest."Determining Daylight Illuminance in Rooms Having Complex Fenestration Systems."International Daylighting Conference Proceedings (1986).

Kim, Jong-Jin, Konstantinos M. Papamichael, and Stephen E. Selkowitz."Development of Regression Equations for a Daylighting Coefficient-of-Utilization Model."International Daylighting Conference Proceedings (1986).

Papamichael, Konstantinos M., Francis M. Rubinstein, Stephen E. Selkowitz, and Gregory J. Ward."The Integration of Operable Shading Systems and Lighting Controls."International Daylighting Conference Proceedings (1986).

Papamichael, Konstantinos M., and Frederick C. Winkelmann."Solar-Optical Properties of Multilayer Fenestration Systems."International Daylighting Conference Technical Proceedings (1986).