Facilities Manager Peer Exchange Meeting

October 18, 2013

Participating Hospitals

• Advocate Illinois Masonic Medical Center (IAMMC)
• Presence Health
• Mt. Sinai Hospital & Schwab Rehabilitation Institute
• Schriners Hospitals for Children - Chicago
• Norwegian American Hospital
• Riverside Medical Center
• Lurie Children’s Memorial
• Swedish Covenant
• University of Chicago Medical Center 

NOTE: If you would like to learn more about any of the following peer exchange discussion topics, please contact the CGHI team and we will connect you with the appropriate hospital(s).

Discussion

We had an engaging discussion about Advocate's new 3*700 ton centrifugal chillers. The total operating efficiency of the new plant is between 0.42 - 0.56 kW/ton including pumps and cooling towers. Using Life Cycle Cost Analysis, Advocate chose high efficiency chillers, which enabled them to receive a $203,700 incentive check from ComEd.

View the FULL PRESENTATION.

Project Highlights

Achieving Key AIMMC Initiatives
Master plan involved following and achieving key AIMMC strategic initiatives:

• N+1 redundancy
• Utilize refrigerants with no ozone depletion potential
• Use less energy to provide equal or higher levels of cooling
• Improve reliability and reduce time devoted by operations staff to maintain chillers
• Provide good stewardship of AIMMC's financial resources in maintaining the facility

Space Efficiency

• All new chillers, cooling tower equipment were installed using existing equipment footprints.
• Retro-fitted the chilled water distribution system to variable-primary flow and used space saving vertical end suction pumps in lieu of conventional base-mounted or inline pumps.
• Chillers using high pressure refrigerants generally require a larger footprint than low-pressure machines (the existing chillers used R-123, a low-pressure refrigerant). This was accommodated for with the new design while maintaining the existing chiller room space.

Cooling Coil Condensate Recovery
New system recovered condensate from four air-handling units to use as cooling tower make-up

• 159,065 Total CFM / 85,363 CFM of Outside air
• Estimated annual condensate recovery of 450,563 gallons/year (based on typical weather data)

Energy Efficiency & Sustainability Features

• High efficiency chillers with VFDs
• Oil-less compressors with magnetic bearings
• Induced draft cooling towers with VFDs
• Premium efficiency motors
• Variable flow primary only pumping configuration for CHW
• Variable flow condenser water pumps
• Cooling coil condensate recovered for CT make- up water