Seymour - Capilano Water Filtration Plant Clearwell Geoexchange Heat Recovery Demonstration Project

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Sharlene Stanley
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1 Seymour - Capilano Water Filtration Plant Clearwell Geoexchange Heat Recovery Demonstration Project Gordon Monk, Technology Integration Manager, BC Hydro Karen Tully, Senior Project Engineer, Metro Vancouver May 3, 2013

2 Presentation Overview 1. Project Partners 2. Energy Performance Analysis BC Hydro Design Assistance Program 3. Demonstration Project Proposal Metro Vancouver (Project Description) (Objectives) 4. Plant / Geoexchange Heat Recovery System Construction 5. Electricity Savings Measurement and Verification Process 6. Results (Key findings) (Implications for customers (municipalities)) 7. Overview of BC Hydro Power Smart New Construction Program 2

3 Demonstration Project Partners Project Owner / Proponent: Metro Vancouver Capital Incentives: Project Manager: Energy Modeling: Geoexchange Design: Geoexchange Installer: Equipment: BC Hydro Power Smart Technology and Innovation Canadian GeoExchange TM Coalition Dejan Radoicic, P.Eng., Stantec Engineering EnerSys Analytics Stantec Engineering Simons (now AMEC) Black and Veatch Field Lockerbie and Hole Contracting HVAC Integration MJS Mechanical Florida Heat Pumps WW modules Armstrong heat exchangers & pumps 3

4 Design Assistance Program Workshop Metro Vancouver became a Power Smart Partner in Power Smart Partners are eligible for BCH Design Assistance Program funding to identify energy saving opportunities. Positioned to help the design team explore energy efficiency during early stages. Brainstorming supported by on-the-fly applications of DOE2.1e iterations. SCFP provides critical operational functions during most extreme emergencies. HVAC systems are designed for high levels of capacity/ redundancy (each GSHP plant pump is equipped with 100% backup). 4

5 Design Assistance Program Workshop Three heat pump modules consisting of five water-to-water heat pumps. Bundled module capacity = 105kW (30 tons) Total system capacity = 315kW (90 tons). Each heat pump has a unique capacity and serves two refrigeration circuits. Total independent loops = 30. Switchover from heating to cooling is achieved on the water side (refrigeration cycle does not reverse) permitting: (i) Zonal heating from the condenser loops; (ii) Zonal cooling from the evaporator loops. Heat is recovered from clearwell by central heat pumps during space heating at projected COP = Heat is recovered by central heat pumps during space cooling for DHW pre-heat with electric boiler backup at projected COP =

6 Geoexchange System Schematic 6

7 Demonstration Project Agreement Project Description: Clearwell has a footprint area equal to three football fields. 45 one-km horizontal ground loops in mud layer beneath concrete floor. Seasonal heating COP increased to 3.5. Seasonal cooling COP decreased to 2.6. Space heating savings: 27.4 kwh/m 2 (65%) Space cooling savings: 5.3 kwh/m 2 ( 7%) DHW heating savings: 8.2 kwh/m 2 (72%) Total savings: 40.9 kwh/m 2 7

8 Demonstration Project Agreement Projected electricity energy savings = 528 MWh/y Projected electricity demand savings = 2,112 kw Projected incremental cost = $319,000. Projected payback period = 10.7 years. Incentive = $106,000 8

9 Demonstration Project Agreement 2004 Objectives: 1. Determine actual capital cost. 2. Confirm safety of installing heat absorption loops containing glycol in the mud layer immediately beneath 200M litre clearwell. 3. Determine actual electrical energy and demand savings. 4. Identify additional maintenance costs. 5. Quantify GHG emission reductions and value of carbon offsets. 6. Determine if design is economically feasible. 9

10 Plant Construction:

11 Plant Construction:

12 Plant Construction:

13 Aerial View North to South 13

14 Elevation View from East Clearwell 14

15 Power Utilization: Measurement & Verification IPMVP Option D - Calibrated Computer Simulation: 1. Operating data is recorded by SCFP s SCADA system. 2. Original DOE2.1 energy model is calibrated to match recorded data. 3. Calibrated model is used to more accurately generate predict baseline energy utilization (assuming identical plant without geoexchange heat recovery). 4. Electricity savings = model-predicted baseline usage actual consumption. 15

16 Results Key Findings 16

17 Results Key Findings Actual electricity energy savings: 1,753 MWh/y (+ 330%) Actual electricity demand savings: 640 kw (- 70%) Actual incremental cost: $380,000 (+ 20%) Annual electricity energy savings: $ 79,000/y Annual electricity demand savings: $ 69,120/y Annual CO 2 emission credits: Annual maintenance costs: $ 9,625/y $ 79,000/y Actual payback period: 4.8 years (- 55%) 17

18 Implications for Customers (Municipalities) A very successful technology innovation demonstration project but application is limited. Requirements: A clearwell or liquid waste tank that is almost always full; Contained liquid heat source must have a relatively constant temperature; Must have an adjacent year-round demand for recovered heat; Cooling demand (electrical room; computer servers; offices) increases system efficiency, energy savings and economic feasibility. Power Smart will be promoting this innovative application of geoexchange. Power Smart is evaluating whether it can provide incentives for similar projects subject to scale, costs and electrical energy/ demand savings. 18

19 BC Hydro s Commercial New Construction Program

20 20

21 BC Hydro BC Energy Plan 21

22 Power Smart Programs Industrial Commercial Residential bchydro.com/powersmart 22

23 CNC Building Types Samuel Brighouse Elementary School, Richmond, BC 50,000 ft2 23 Toronto Dominion Bank, Coquitlam, BC 9,000 ft2 Telus Gardens, Vancouver, BC 950,000 ft2

24 CNC Program Description Whole Building Design Learn Operate Design System Design Build Energy Efficient Lighting Design 24

25 CNC Building Baseline BC Baseline 90% of projects Co V Baseline 10% of projects Energy Use Intensity (EUI) ASHRAE ASHRAE LEED NC Proposed CNC Building 25

26 3 years later by the numbers 135 Completed Buildings 84 Energy Study Agreements 190 Capital Incentive Agreements 26

27 Partnerships Technical Alignment Energy Study Agreement Energy Study Approval Energy Saving Opportunities Capital Incentive Agreement Capital Incentive Agreement 27

28 Partnerships Technical Alignment 28

29 Education / Recognition 29

BC Hydro has been incredible, any questions we

energy efficient products that exactly meet our

.that makes the Atrium one of the most energy

Wyshnowsky Director of Store Engineering for

Karen Jawl Energy Manager and Manager of

The New Construction Program has been an invaluable

develop high performance buildings My advice to any

We could have done it by ourselves, but not as well.

30 BC Hydro has been incredible, any questions we have, they can answer, and they ve helped us find energy efficient products that exactly meet our needs..that makes the Atrium one of the most energy efficient buildings in North America Jerry Wyshnowsky Director of Store Engineering for Thrifty Foods Ltd. Karen Jawl Energy Manager and Manager of Operations, Jawl Properties Ltd. The New Construction Program has been an invaluable resource, providing us the support needed to develop high performance buildings My advice to any designer or developer, is to get BC Hydro involved from the beginning. They have expertise and resources you can rely on. We could have done it by ourselves, but not as well. Dave Mackintosh Director, Capital Projects, Vancouver Coastal Health Warren Buckley President and CEO of BC Pavilion Corporation Questions? uction Luis Damy New Construction Program Manager

31 New Construction Program Fuel Switching Approach 90 Incentive Approach (Potential DSM Incentives for Multiple Energy Sources) 80 Energy EUI (MBTU/sf) Switch Mechanical System Gas Savings Fuel Switching Potential Incentives Electricity Savings Improve Proposed System EE Gas Electriciy 0 Baseline Proposed Proposed System Proposed EE Electric EE System System Proposed Options 31

32 Project Contacts Gordon Monk Technology Integration Manager BC Hydro Power Smart Karen Tully Senior Project Engineer Metro Vancouver T E. T E. 32

REGULATORY IMPACT STUDY FOR WATER AND GROUND SOURCE HEAT PUMPS

REGULATORY IMPACT STUDY FOR WATER AND GROUND SOURCE HEAT PUMPS PREPARED BY: ENERGY EFFICIENCY BRANCH, BC MINISTRY OF ENERGY AND MINES HTTP://WWW.EMPR.GOV.BC.CA/EEC/STRATEGY/EEA/PAGES/DEFAULT.ASPX AUGUST