Class A office building system design: Electrical, power, and lighting

Class A office buildings are among the toughest projects an engineer can work on—complex structures, demanding clients, and advanced technology. Electrical engineers have their work cut out for them.

02/25/2016


Daniel G. Dowell, VP Energy Performance Contracting Sales, ABM, Raleigh-Durham, N.C. Courtesy: ABMKurt Karnatz, PE, CEM, HBDP, HFDP, LEED AP, President, ESD, Chicago. Courtesy: ESDLance Kempf, PE, Director of Mechanical and Electrical Engineering, LEO A DALY, Minneapolis. Courtesy: LEO A DALYBrian Michelson, PE, MEP Design Phase Manager, Mortenson Construction, Minneapolis. Courtesy: Mortenson ConstructionJoseph H. Talbert, PE, ARM, Project Manager, Aon Fire Protection Engineering, Lincolnshire, Ill. Courtesy: Aon Fire Protection Engineering

Respondents

Daniel G. Dowell, VP Energy Performance Contracting Sales, ABM, Raleigh-Durham, N.C.

Kurt Karnatz, PE, CEM, HBDP, HFDP, LEED AP, President, ESD, Chicago

Lance Kempf, PE, Director of Mechanical and Electrical Engineering, LEO A DALY, Minneapolis

Brian Michelson, PE, MEP Design Phase Manager, Mortenson Construction, Minneapolis

Joseph H. Talbert, PE, ARM, Project Manager, Aon Fire Protection Engineering, Lincolnshire, Ill. 


 

Figure 4: The John Hancock Center is a 100-story building in Chicago. The building includes Class A office space, residential condominiums, restaurants, retail space, and an observatory on the 94th floor. The building was completed in 1972. The building iCSE: What types of renewable energy systems have you recently specified in a Class A office building project? This may include photovoltaics, ground-source heat pumps, etc.

Kempf: We have specified geothermal wells and photovoltaics.

CSE: What unique lighting or lighting control systems have you completed?

Kempf: We've used a combination of energy-efficient linear fluorescent and LED sources. We've specified LEDs for downlights, cove lighting, linear slots, and all exterior lighting. We've used a combination of occupancy sensors, daylight-harvesting methods, and full-building lighting control systems to meet energy codes and reduce energy consumption. On open-office plans, we've used three zones of lighting relative to the distance from windows—the closer to the windows, the more the lights are dimmed.




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