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Central Utility Plant – Optimization Sumit Ray, PE, CEM, LEED Director, Engineering & Utilities Oct 15, 2012 1
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
1
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Introduction
2
SCP – (2) 2500 ton each Chiller
SSP – (4) 150k lb/hr each Steam Boilers WCCUP – (2) 2500 tons
each chiller & (2) 250k lb/hr Steam Boilers
Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Energy Optimization
Reliability
Energy Efficiency
“Running a utility plant vs. running a utility plant efficiently.”
Benchmarking – IFMA 2009 Central plant
3
Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Pilot Project – University of Chicago Grad students initiative to
develop central plant optimization based on Stanford algorithm
– Forecast load (10 days look ahead)…weather data
– Equipment performance (Part load)
– Energy Costs calculations & tracking
– Develop optimum equipment dispatch schedule
– Track energy & costs (real-time dashboard)
4
Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Results – System Deficiencies (Operational)
• Boilers capacity (max) at operations ~ 75% of full capacity
• Boilers doesn’t have 10:1 turndown ratio
• Chiller surges at low load conditions (low refrigerant)
• Chiller operation & Free cooling switch over is not automatic
• Condensate water reset program was not installed
• Utility meters are not accurate
5
Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Results
6
Central Utility Plant Optimization
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
System Load (kpounds of steam)
boiler1 boiler2 boiler3 boiler4
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
System Load (kpounds of steam)
boiler1 boiler2 boiler3 boiler4
Pre-Pilot Pilot
Efficiency Ranking Boiler #
1 Boiler 3
2 Boiler 4
3 Boiler 2
4 Boiler 1
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Results – Savings Verifications (Energy Savings)
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Central Utility Plant Optimization
Hours Plant
Efficiency Total Production
(lbs of steam) Gas
(kscfh)
PREPILOT 330 75.7% 41,231,648 54706
PILOT 510 81.6% 58,369,670 64046
These are initial savings; we are in
process of validating savings numbers
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
• Next Steps – Validate all meters at the plant
(Calibrate / Repair / Replace)
– Install the software for operational efficiency
– Fix system deficiencies
– Provide real-time (every 1 min) system data
– Track actual costs vs. optimum costs (Variance)
– Validate savings over time (at-least one year)
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
Dashboard
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
Equipment Schedule
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
Equipment Status
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
Plant Performance
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
LIVE DEMO
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Central Utility Plant Optimization
Central Utility Plant – Optimization
Sumit Ray, PE, CEM, LEED
Director, Engineering & Utilities Oct 15, 2012
Questions ??
Contact Information:
Sumit Ray
773-230-1987
773-834-3029
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Central Utility Plant Optimization
