Carnegie Mellon University selected SEMCO systems to support its energy efficiency goals for the Gates Center for Computer Science and the Hillman Center for Future‑Generation Technologies. Eleven custom‑built VAV air handling units with integrated 3‑angstrom total energy recovery wheels were used to condition the facilities. The systems contributed to documented energy savings, operational benefits, and LEED certification.
Key Facts
- Eleven custom‑built VAV air handling units supplied
- Integrated 3‑angstrom total energy recovery wheels
- More than $90,000 in energy savings recorded in the first year
- 217,000 square feet combined building size
- Facilities include research space, 310 offices, laboratories, a 250‑seat auditorium, conference rooms, and classrooms
- LEED Gold certification awarded in 2011
- Energy wheels avoided 512 tons of carbon emissions annually
- 533,000 gallons of cooling tower water saved annually
- Chiller capacity reduction of 227 tons
- Boiler horsepower reduction of 135 HP
- Outdoor air preheated to over 53°F during ‑6°F outdoor conditions
- Real‑time performance monitoring integrated into control systems
Challenge
The university required HVAC systems capable of achieving high energy efficiency, supporting LEED certification goals, and maintaining proper ventilation, humidity control, and occupant comfort within large, variable‑air‑volume facilities.
Solution
SEMCO provided eleven variable air volume air handling units with integrated total energy recovery wheels, bypass dampers, direct digital controls, and full electrical packages. Additional instrumentation was installed to measure recovery wheel performance. Systems included factory‑tested control algorithms, sound attenuation measures, and rooftop and indoor installations configured to meet the facilities’ architectural and operational requirements.
Results
- More than $90,000 annual energy savings
- Projected more than $2,000,000 in 20‑year energy savings
- 512 tons of carbon emissions avoided per year
- 533,700 gallons of cooling tower water saved annually
- Reduced chiller and boiler capacity valued at approximately $310,000
- Provided 30% more outdoor air than ASHRAE 62 minimum requirements
- Contributed to LEED Gold certification
- Preheated outdoor air to over 53°F at ‑6°F outdoor conditions
“The fundamental design principle was to [realize an environmentally responsible project] without compromising the exceptional functional and experiential aspirations inherent to the visionary building program, but by actually enriching them. This goal was not only met — it has exceeded our initial expectations.”
Mack Scogin
Architect
Carnegie Mellon University
Products Used
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