MicroGrids and CHP. September 8, 2016

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1 MicroGrids and CHP Facilities Operations & Building Services Utilities Operations and Energy Management Chris Tietjen, Central Utility Plant & Cogen Facility Engineer September 8, 2016

2 UCONN Storrs Campus ,000 Students, Faculty & Staff 10.2M Sq. feet of heated & cooled space Fifth consecutive year among the top 10 schools in the Sierra Club s Cool Schools ranking. Sixth consecutive year among the nation s top 25 public universities. 25MW Cogeneration Plant 3M GPD water pollution control facility 1.5M GPD Reclaimed water facility 2

3 UCONN Cogeneration Dr. Lee S. Langston, Professor Emeritus of Engineering, University of Connecticut recipient of the R. Tom Sawyer Award presented by the American Society of Mechanical Engineers. Recognized the need for a Cogeneration plant at the Storrs campus going back to the early 1990 s. The 25MW cogeneration plant that provides Electricity/Steam/Chilled water to the Storrs campus became operational in The Cogeneration plant cost $81M, a figure which included modifications to existing utility infrastructure, is expected to save the University $180M in energy costs over its forty-year design life. 3

4 Central Heat and Power 2016 Cogeneration/CUP facility Utilities 24.9 MW of Generation (Permitted), 13.8KV 4MW of Emergency Generation, 4160V 530,000 PPH of Steam 12,500 tons of cooling Utilities Infrastructure Current Electric Peak 26.5 MW Current Steam Peak 240 KPPH Current Chilled H20 Peak 8500 Tons 4

5 UCONN Storrs Campus Electrical Generation at CUP Cogeneration plant supplies electricity to 10M SF building space MW GAS TURBINE DRIVEN GENERATORS 24.9MW 1 4.6MW STEAM TURBINE DRIVEN GENERATOR 3 Emergency Diesel Generators 4MW total capacity 13.8KV Distribution & 4160V Emergency Distribution 105 AUTOMATIC TRANSFER SWITCHES OWN SUBSTATION and RELAY SYSTEM FUEL 380 psi NATURAL GAS AND NO. 2 OIL (Ultra Low Sulfur Diesel) 300,000 gal capacity. VULNERABILITY LOSS OF NATURAL GAS SINGLE 69 KVA ISO 800 line BACKUP 5

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8 UCONN Storrs Campus Steam Production CUP supplies steam to 7.3M SF building space (156 buildings) 5 STATIONARY BOILERS HEAT RECOVERY STEAM GENERATORS 2006 CAPACITY: 530,000 pounds per hour PRESSURE: INSIDE CUP 600/125 psi, DISTRIBUTION PIPING AT 65 psi FEED WATER SUPLLIED BY RECLAIM WATER BACKED UP BY POTABLE WATER. 6 50,000gallon OIL TANKS FUEL - NATURAL GAS AND NO. 2 OIL (ULTRA LOW SULFUR DIESEL) VULNERABILITY LOSS OF NATURAL GAS 8

9 UCONN Storrs Campus Steam Distribution 43,000 LF OF STEAM SUPPLY AND CONDENSATE RETURN SYSTEM DATES FROM 1930 S, UPGRADED SECTIONS 1960s RENOVATION IN PROCESS VULNERABILITY PIPE FAILURE STEAM SUPPLY CUT OFF TO SECTIONS OF BUILDINGS CONDENSATE LOSS IMPACT ON WATER USE 9

10 UCONN Storrs Campus Central Chilled Water Cup supplies Chilled Water to 3M SF building space (26 buildings) via North & South Utility Tunnels CAPACITY 12,500 TONS 4 STEAM DRIVEN CHILLERS 2 ELECTRIC DRIVEN CHILLERS 2 GAS DRIVEN CHILLERS Free Cooling Heat Exchanger South Chilled Water 1993 CAPACITY 1OOO TONS 500 TON ELECTRIC DRIVEN 500 TON GAS DRIVEN Building Stand Alone 97 Systems 10

11 Strategic Energy Management (SEM) Plan Electricity Upgrade to a fully redundant N+1 electrical system that can support the entire campus, without load shedding, should one source fail Existing: The current Cogeneration plant at the Central Utility Plant (CUP) can support the electrical needs of the campus a majority of the time, backed up by UConn Substation 5P, which receives primary power from Eversource. UCONN imports power through Substation 5P when campus demand exceeds CUP capacity and when all or part of the CUP is unavailable. When Eversource primary power to Substation 5P is unavailable, load shedding schemes must be implemented. Upgrade Substation 5P and the CUP so that the entire system is a fully redundant N+1 system. Determine the feasibility of installing a second Cogeneration Plant, and implement if and when this additional capacity is required 11

12 Strategic Energy Management (SEM) Plan Steam Efficiently supply high pressure steam to, and return pumped condensate from, buildings via the Central Utility Plant (CUP) Provide building-level high pressure steam (HPS) and pumped condensate (PC) meters at all existing, renovated and new building entries Existing distribution piping is in very poor condition and beyond its useful life. Replace existing HPS and PC radial piping network Provide piping bridges serving new supplemental utility plants Complete the North District distribution loop and provide a piping bridge (via utility tunnel) serving the South District 12

13 Strategic Energy Management (SEM) Plan Chilled Water Increase capacity and distribute throughout campus with enhanced efficiency and redundancy Existing: The existing chilled water (ChW) infrastructure on campus includes the CUP and the South District SUP (South Chiller). These two plants are not connected and operate independently. Chilled water is currently supplied to the campus via the North & South utility tunnels and underground radial piping network. Provide building-level ChW meters at all existing, renovated and new building entries Increase the capacity of the existing CUP and the South Chiller Expand ChW service to new development at X Lot and on the South Campus with piping bridges (via utility tunnel) to the CUP Complete north and south piping distribution loops 13

14 Strategic Energy Management (SEM) Plan Gas Decrease dependency on natural gas as Climate Action Plan goals are reached Existing: Gas service is owned and the infrastructure is maintained by Connecticut Natural Gas. There is currently adequate gas supply to support the Master Plan over the long term. Increase gas service in the near term until supplemental utility plants (SUPs) are connected Connect new development to the CUP and SUPs for electric, heat, and hot water needs Reduce gas usage in the long term 14

15 Energy Services Performance Contract Scope: UConn ESPC Phase I Pilot Project Replace and upgrade aged Steam/Condensate lines ~ 2,650 LF in Hillside Road Replace 11 Steam/Condensate Vaults Retro-commission (RCx) ~ 1M GSF total in numerous science buildings Utilize the DEEP Lead by Example Program Contract Awarded to Consolidated Edison (ConEd) Solutions Budget: $28.1M Final Phase Project Budget Estimated operational and maintenance savings of ~ $1.5M per year Schedule: Construction Start May 2016 Project Duration 22 months 15

16 Energy Services Performance Contract Project Locus Future Steam and Condensate Return

17 Energy Services Performance Contract State of Connecticut DEEP Lead By Example Program o UConn is the first State agency to execute an ESPC Contract Guaranteed Maximum Price $23,174,871 Guaranteed Annual Savings $1,588,782 o Energy Operational Budget covers Bond Debt Simple Payback Period 14.6 years Guaranteed Energy Savings o o o o o 3.74 Million kwh Electrical Consumption 402 kw Electrical Demand Reduction 6,239 Therm Natural Gas 70,214 MMBTU Steam 70,214 Ton-Hr Chilled Water o 9,773 Ccf Domestic Water 17

18 UCONN Depot Campus Listed on the National Register of Historic Places in Acres with 60 Buildings Now a Research Campus Center for Clean Energy Engineering (C2E2)

19 UCONN Depot Campus

20 UCONN Depot Campus Guarantees Electrical Minimum Output 400 kw; 3,153 MWh/Year Natural Gas Maximum 44 million cubic feet/year CT Clean Energy Fund $1 Million Grant Authorization to Energize April 25, 2012 Commercial Operation April 30, 2012 Day One Issues Thermal Output not guaranteed 1.7 MMBtu/hour Property Taxes Changes of Ownership UTC to ClearEdge 12/22/2013 Renewable Energy Credits Stack Replacements Maintenance Field Service Visits to date

21 UCONN Depot Campus 2016 Performance To Date Guaranteed Minimum Electrical Output 400 kw 91.63% of all available hours. (Comparison: Eversource 2015 reliability was 99.98% and Storrs Cogeneration Plant (99.99%) Low grade heat recovery 52.22% of all available hours. High Grade heat recovery 79.80% of all available hours.

22 UCONN Depot Campus MicroGrid Development April 9, 2013 DEEP RFP Round 1 June 18,2013 UCONN Submitted Proposal $2,169,234 Based on Fuel Cell plus 6.6 kw PV for kw continuous load and 446.k kw peak load Partners with ClearEdge Power, Schneider Electric and A/Z Corporation Services to 9 Buildings using 327 kw Expected Completion date of June 12, 2014 July 23, 2013 DEEP Selects UCONN Depot Grant $2,144,234

23 UCONN Depot Campus MicroGrid Development May 1, 2014 ClearEdge Power Default Files for Bankruptcy Chapter 11 Proton Exchange Membrane (PEM) to Phosphoric Acid Fuel Cells (PAFCs) switch on 5 kw and 400 kw units May 6, 2014 Project MicroGrid Research Program at the Depot Campus Placed on Indefinite Hold DEEP agrees to hold grant June 30, 2014 Doosan Fuel Cell America purchased bulk of ClearEdge assets, excluding UCONN Depot Campus Fuel Cell 9553 Energy Services Agreement and a few others

24 UCONN Depot Campus MicroGrid Development November 12, 2014 Talmer Bank and Trust dba Ardent Service Corporation, LLC receive the UCONN Depot Campus Fuel Cell 9553 Energy Services Agreement and a few others via the Bankruptcy Court Settlement with a subcontract to Doosan Fuel Cell America for service June 1, 2016 UCONN approved Ardent Service Corporation ownership assignment to VFS, LLC with Removal Obligation backstopped by Doosan Fuel Cell America UCONN is in ongoing discussions to determine whether additional fuel cells and Microgrid development will occur