DIVISION OF ADMINISTRATION UTILITIES & ENERGY SERVICES. David Payne, P.E Interim Associate Director October 16, 2012

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1 DIVISION OF ADMINISTRATION UTILITIES & ENERGY SERVICES David Payne, P.E Interim Associate Director October 16, 2012

2 Agenda - Production System Overview - Distributions Systems Overview - Recently Completed Projects - Combined Heat & Power - Production & Distribution Optimization 2

3 Utility Production Upgrade Construction Locations SUP2 CUP SUP1 SUP3 3

4 Power & Steam Generation Electrical Power 600 psi Steam 60 psi Steam Generator Installed Capacity (MW) GTG STG STG Total Capacity 50 MW Boiler Installed Capacity (mlb/hr) Total Capacity 410 mlb/hr Boiler Installed Capacity (mlb/hr)

5 Chilled Water Production Location Chiller Number / Type Capacity CUP 7 Electric motor-driven centrifugals 16,500 tons 3 Steam turbine-driven centrifugals 10,000 tons Total CUP Capacity 26,500 tons SUP1 6 Electric motor-driven centrifugals 11,500 tons SUP2 5 Electric motor-driven centrifugals 8,500 tons SUP3 4 Electric motor-driven centrifugals 4,700 tons Total SUP Capacity Total Campus CHW Production Capacity 24,700 tons 51,200 tons 5

6 Plumbing Distribution Over 150 miles of piping on campusdirect buried and in tunnels Domestic cold water Domestic hot water Steam and condensate Chilled water Heating hot water Sanitary sewer Storm water Natural gas 24 Water Transmission Line Repair 6

7 Electrical Distribution 34 major campus electrical feeders 300 miles of electrical cable 1,100 transformers (15 to 2500 KVA) 250 underground switches Underground Switch 147 building emergency generators Over 4,500 street, parking lot & pedestrian walkway lights Electricians and line technicians operate and maintain complex systems Combined in-house & contract services F&B Road Lighting 7

8 Recent Utility Projects Utility System Wide Critical Instruments Upgrade ( ) Utilities Plant Control System Upgrade (2009) Plant Optimization Program (POP) Model (2012) CUP Chiller Plant Expansion (2009) Boiler 12 Burner Modification (2009) Cooling Tower 41/42/43 Refurbishment (2010) Combined Heat & Power (2011) 8

9 Recent Utility Projects SUP1 Satellite Utility Plant 1 Chiller Upgrade (2011) SUP2 Satellite Utility Plant Expansion (2008) Chiller 32 Replacement (2010) SUP2 HHWB Capacity Upgrade(2011) SUP3 Southside Utility Plant Upgrade (2009) SUP3 HHWB Capacity Upgrade (2011) 9

10 CHP and District Energy at TAMU Size of campus served: 750 buildings, 22.5 million gross square feet (GSF) 19 million GSF conditioned space (cooled & heated) Electrical power capacity and load: 50 megawatts on-site generation capacity (3 generators) 120 megawatts grid power capacity (138 kv transmission) 75 megawatts peak load District cooling capacity and load: 52,000 tons cooling capacity (27 chillers) 36,000 tons peak cooling load District heating capacity and load: 620 mmbtu/hour heating capacity (25 boilers) 250 mmbtu/hour peak heating load 10

11 Major Equipment & Systems Installed Major Equipment Installed GE LM2500 +G4 gas turbine 45,594 HP Brush generator (G1) 34 MW EIT heat recovery steam generator (600 psi) 210 mlb/hr Dresser Rand back pressure steam turbine 14,571 HP 600 psi input/20 psi output Hyundai Ideal generator (G2) 11 MW Cleaver Brooks low pressure boiler (60 psi) 950 HP Extensive Electrical and Steam System Upgrades Over two miles of electrical duct bank Replace 12.5 kv electrical distribution cable and switches Upgrade three campus switching stations Major plant electrical system upgrades Plant steam system upgrades Plant control room renovation Monitoring and control system upgrades Rating 11

12 TAMU CHP Flow Diagram 12

13 Benefits Of CHP Typical off-site fossil fuel power generation Power generation efficiency 35% Line loss (from source to site) 5% Delivered on-site efficiency 30% Modern high efficiency CHP plant 75 to 80% efficient GTG to HRSG to STG to HX s Reliable on-site electrical and thermal energy source Ability to supply campus during power interruptions Higher efficiency reduces energy consumption & cost Significant reduction in emissions and carbon footprint 13

14 CHP Analysis & Justification $73.25 million capital investment $6 to $10 million projected annual cost avoidance (actual cost avoidance determined by cost of energy) Simple payback of less than 10 years $10 million DOE grant awarded to TAMU Reduced energy consumption and emissions Improved: reliability of service redundancy and emergency power source sustainability with reduced carbon footprint 14

15 Energy Action Plan (EAP) 2015 Initiative 8: Utility Production and Distribution Optimization The purpose of this initiative is to ensure that the production and distribution facilities are operated in the most safe, reliable, and efficient manner, with clear standards of service to campus. Objective 8.1: Create performance measures for each facility and track performance. Continue to optimize production and distribution infrastructure. (2012) Objective 8.2: Make highly effective and timely Make or Buy decisions for electricity on a daily basis and closely coordinate nominations. (Ongoing) Objective 8.3: Fully leverage on-site Combined Heat and Power generation as an energy and cost- saving system as well as an educational and environmentally beneficial system. (Ongoing) 15

16 Optimization Campus Standards, Design, and Operating Guidelines CHW/HHW/DHW Reset Schedules Real Time and Monthly Energy Purchasing Electrical SCADA Exterior Lighting Controls Key Performance Indicators Plant Optimization Performance (POP) Model Campus Thermal Loop Water Reports Campus Thermal Loop Performance Reports FY13 Utility Production Upgrade 16

17 Key Performance Indicators (KPIs) ENERGY FORECAST ACCURACY Monthly Natural Gas Consumption Monthly Electricity Production Monthly Electricity Purchases CUSTOMER SERVICE Service Availability Index Electrical Service Availability Index CHW Service Availability Index HHW Service Availability Index DCW SAFETY / REGULATORY / TRAINING Regulatory Permit Compliance Safety Meeting Attendance Completion of Required Training Safe Work Time Index Lost Time Accidents ADMINISTRATION Invoice Payment Efficiency Vehicle Log Submission Timelines Vehicle Log Accuracy Utilities Hiring Efficiency Hourly Staff Resource Loading FINANCIAL Total Utility Cost Purchased Utility Cost ($/GSF) Operating Cost ($/GSF) Utilities Labor Cost ($/FTE) Total Purchased Utility Costs ($/mmbtu) ENERGY Total Energy Use (Billion Btu) Energy Use Index (mmbtu/gsf) 17

18 Plant Optimization Model 18

19 Thermal Loop Water Balance Report 19

20 Campus Thermal Loop Performance Report 20

21 FY13 Utility Production Upgrade CUP Steam Chiller 9 Replacement SUP1 Chiller 103 Replacement SUP1 Thermal Energy Storage SUP2 Heat Pump Chiller Chiller Plant Optimization 21

22 Summary Production System Overview Distributions Systems Overview Recently Completed Projects Combined Heat & Power Production & Distribution Optimization 22

23 Central Utility Plant Tour 23