CHAPTER EIGHT
End-Use Energy Efficiency
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Exhibit 8-9
Robert E. Johnson building designed to be a sustainable project with numerous Energy Conservation Design Measures (ECDMs)
Exhibit 8-9 shows an image of the Rober E. Johnson Building. The building's sustainable features include:
- extensive use of natural daylighting such as curvilinear, specular light shelves that project light deep into the interior of the building;
- clerestories - glass partitions above interior walls (7’-10’) to enable daylight to penetrate deeper into interior spaces, thereby reducing electric lighting loads and internal heat gains;
- high-quality color rendering lamps and high efficiency dimmable electronic ballasts - automatic dimming of artificial lights in response to the quantity of daylight available;
- new glazing technologies that allow for “selective tuning” that reduce solar heat gain while maintaining a relatively high daylight transmittance;
- combination of ambient and task lighting fixtures to reduce loads and concentrate light where needed;
- photovoltaic sunshades;
- regionally-sourced structural and interior materials that neither off-gas nor emit volatile organic compounds;
- high ceilings for daylight to penetrate deep into the space and to light the space evenly using direct/indirect lighting; and
- enhanced HVAC system efficiencies that reduce operating costs by almost 50% and resultant CO2 emissions by 30%.
Source of image: Suwon Song “Development of New Methodologies for Evaluating the Energy Performance of New Commercial Buildings”, Department of Architecture, Now Research Professor, Yonsei University, South Korea. Source of features: http://www.seco.cpa.state.tx.us/re_sustain.htm.