Evaluation of integrated wall systems incorporating electrochromic windows [Final report]

Technical Report · Fri Mar 30 04:00:00 EST 2001

DOI:https://doi.org/10.2172/803361· OSTI ID:803361

Sbar, Neil L ^[1]

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1. SAGE Electrochromics, Inc., Faribault, MN

Billions of dollars are spent annually in the U.S. on energy lost through the use of inefficient windows. Even wall systems with advanced static glazings and moveable shading devices are not optimal because they can't effectively respond to changing solar conditions. Electrochromic (EC) smart windows can dynamically control the amount of solar light and heat entering a building. The energy saving performance of fully dynamic wall systems containing EC windows was compared with that of static systems using the DOE 2.1E building simulation program. Total costs for different scenarios were computed. SAGE demonstrated the capability to produce double pane EC windows in which the transmittance repeatedly varied between 2-58%. Relative impact of EC glazings in buildings compared to static is 10-20% energy savings across all climatic regions investigated. Significant life cycle cost savings are predicted for SAGE's EC windows when compared to conventional solar control windows over an estimated product lifetime of 20 years.

• Research Organization: SAGE Electrochromics, Inc., Faribault, MN (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: FG02-99ER82875
• OSTI ID: 803361
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
DOLLARS
EVALUATION
LIFE-CYCLE COST
LIFETIME
PERFORMANCE
SHADING
SIMULATION
WINDOWS