Case Study #2: Tjaden Hall

Scope of Work

• Recommissioned the existing mechanical and control systems to optimize overall system performance.
• Modified the existing constant volume air system to a variable air volume system to reduce the unnecessarily high air change rates in the office and academic spaces.
• Installed passive infrared occupancy sensors and replaced most of the existing pneumatic controls with electronic controls to enable occupied and unoccupied modes of operation.
• Installed variable speed drives on the existing hot water/glycol heating system circulation pumps to reduce pump motor energy use at partial loads.
• Removed the unused chilled water coils and replaced the existing filters with high efficiency, low static pressure filters to reduce fan motor energy use.

Project Completed

• January 2004
  

Project Cost

• $358,000
  

Energy Savings

• $90,000
  

Simple Payback

• 4.0 years