Steam to Hot Water Conversion The University of British Columbia Vancouver, B.C.

The University of British Columbia UBC Stats 12 million sq.ft. of institutional buildings 3 million sq.ft. residential Day time pop. ~ 65,000 ~ 30% growth over the next 15 to 20 years UBC Stats Steam 785,000,000lbs/year 1.1 million GJ/year NG 78% of GHG emissions Electrical 309 GWh/year 49 MWe peak load 8% of GHG emissions

Steam to Hot Water Project Overview 5 year, 9 phase, $88 million project to convert the campus from steam to a hot water 11 kilometers of pre-insulated direct buried piping 115 building conversions 60 MegaWatt Natural Gas fired Campus Energy Center 12 buildings w/ steam process load requirements

History of District Energy at UBC UBC Powerhouse circa 1925 3rd permanent building built on campus

Original 1920’s Coal Fired Boilers 3 original Boilers Boiler 1&3 replaced in the 1950’s All 3 converted to Natural Gas in 1960’s Boiler 3 decommissioned in the 70’s Boiler #1 & 2 still working today

1960’s Campus Growth 1969 Boiler added #5 – 150,000 LBS/hr 1965 Boiler #2 Replaced -100,000 LBS/hr 1961 Boiler #4 added – 100,000 LBS/hr

Title of Presentation | Qualifier Text | Page 2002 Ecotrek Project $30m Largest energy and water retrofit project on a Canadian campus Major focus on steam system improvements Allowed UBC to meet it’s Kyoto Protocol 2007 Comprehensive campus GHG inventory Reduced intensity by 23% and saved over 150,000 GJ/yr of Natural Gas Major overhaul of Steam systems including Boiler Economizers on #2,4 & 5 Steam and condensate system repairs Upgraded the boiler management system Improved buildings HVAC controls and schedules Saved 150,000 GJ of natural gas/yr 20 GWh/yr Electricity

2010 UBC GHG Reduction Targets UBC adopted its Climate Action Plan in 2010, committing the university to aggressive greenhouse gas (GHG) reduction targets of: 33% below 2007 levels by 2015 67% below 2007 levels by 2020 100% below 2007 levels by 2050

Achieving GHG Reduction TARGETS Detailed Campus wide feasibility study recommends a mix of demand side and supply side options including: 1. Steam to hot water conversion of district heating system (22% GHG reduction) 2. Bioenergy Research and Demonstration Facility (12% GHG Reduction) 3. Continuous optimization of buildings (3-5% GHG Reduction)

UBC STHW Project

Title of Presentation | Qualifier Text | Page Rationale for STHW Aging infrastructure – boilers, piping, heat exchangers and plant Saves $5.6 million per annum in regulatory, commodity, carbon, capital, operational & maintenance costs Reduces Campus Greenhouse Gas emissions by 22% Increased energy supply options Risk mitigation strategy 6th October 2014 8th October 2014 Average 30 year operating costs excluding loans estimated at 15.4 Million for hot water Vs. 21 Million for steam = 26% savings

Phase 1 Pilot Project Phase 1 Summary 1,100 trench meters of piping laid 13 buildings converted Successful repurposing of existing oversized heat exchangers Connect to future waste heat from BRDF Phases 1 completed on budget and on time Confirmed Phase 1 energy savings of 12,000 GJ’s NG and 600 tonnes of CO2 emissions

Phases 1 Lessons learned Phased implementation verified costs estimates and delivered energy savings Existing steam piping was found to be very poorly insulated Elimination of 80+% of existing boiler pressure vessels (BPV) and steam regulated equipment. Reuse of existing steam HEX’s are a viable option for initiating a DE project, before the new primary heat source is constructed. USB Mech Room

Phase 2-3 Summary 3,600 trench meters of DPS laid 5 buildings added Coordination with UBC Public Realm 500m of steam lines decommissioned Confirmed Phase 2 energy savings of 3,000 GJ’s NG and 150 tonnes of CO2 emissions

Temporary Energy Center (TEC): Early energization project Steam Powerhouse TEC Summary Allows for ongoing building commissioning prior to CEC construction Likely 45+ buildings will be added in advance of CEC Expected additional energy savings of 125,000 GJ’s NG and 6,250 tonnes of CO2 emissions for 2014/15 Temporary Energy Center Main UBC Steam feeder line New DE feeder pipe line summer 2013 Western Steam feeder line

Phase 4 Campus Energy Centre Expected Completion September 2015 3 x 15 MW Natural gas/#2 diesel boilers 1 MW condensing economizer Designed for future expansion, and Future integration with other clean energy technologies (cogeneration).

Energy Centre’s 60 MW Hot water Campus Energy centre (Under construction) 16 MW Temporary Steam to hot water Station complete (In service) 6MW Biomass 2 MW Cogen (HR) (In service)

Feb 2015 Building Conversions Energy Transfer Stations (ETS) 35 Complete 70 under construction

Expected Nov/Dec 2015 All Planned UBC Buildings Converted

Title of Presentation | Qualifier Text | Page Steam Process Loads 12 buildings with sterilization requirements (Autoclaves, cage washers) 6 buildings require steam for humidification Most researchers already had clean steam generators Absorption chillers (3) required replacement Kitchens – Dishwashers (2) and steam kettles (3) Sterilization (Autoclaves, cage washers) 12 buildings found to require steam for process loads Electric steam generators used for isolated loads <100 KW’s Gas steam boilers required for 2 buildings with significant steam loads Humidification – Generally not required in Vancouver 6 Buildings found to required steam for humidification Museums, Rare books, animal care Note: Clean steam generators already used by most researchers Absorption chillers 3 chillers required replacement Kitchens – Dishwashers and steam kettles 2 aging dishwashers replaced 3 Steam kettles

LSC and Pharmacy Process Steam Microgrid, Proposed HP Steam Header LP Header Building ~6MWt/hr Process peak 4,000lb/hr ADES

HINDSIGHT 20/20 Earlier assessment of orphan steam requirements. Work year round (first three years was summer only) Improved communications for campus stakeholders on disruptions Regular communication for project team crucial The temporary energy centre was essential (would have done it earlier)

Conclusions to Date Project is currently 90% tendered, on schedule and on budget Phased implementation: allowed for lessons learned in earlier phases to be incorporated into future phases verified costs estimates delivered energy and cost savings from phase 1 onwards confirmed original business case assumptions e.g. existing steam piping was found to be very poorly insulated Elimination of 80+% of existing boiler pressure vessels (BPV) and steam regulated equipment within converted buildings. On target for 5.5 km’s of steam line to be decommissioned by end 2014 Use of Existing steam HEX’s and a TEC, allows for the early energization of DPS & ~ 60% building conversions, while implementing the DE project and before the new Campus Energy Center is built & commissioned. STHW on target to achieve a minimum 22% GHG reduction as expected by end 2015

Title of Presentation | Qualifier Text | Page Thank you David.Woodson@ubc.ca or Paul.Holt@ubc.ca 24