PARK DISTRICT ENERGY WALK-THROUGH. Andy Robinson, Training and Education, SEDAC

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1 PARK DISTRICT ENERGY WALK-THROUGH Andy Robinson, Training and Education, SEDAC

2 ILLINOIS ENERGY NOW University of Illinois 360 Energy Group 2

3 WHAT WE DO SEDAC Free Services Outreach and Training Energy Assistance and Assessments New Construction Design Assistance New Construction Incentives Energy Performance Contracting Support Retro-Commissioning Application Assistance

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5 ENERGY EFFICIENCY PORTFOLIO STANDARD ComEd Ameren Illinois Electric Efficiency (75% of $) DCEO Electric Efficiency Gas Efficiency (25% of $) Nicor Gas Peoples/North Shore Ameren Illinois Gas Efficiency (75% of $) Private Sector Businesses Residential Non-profits Public Sector Governments K-12 Schools Community Colleges Public Universities Low-Income Residential Affordable Housing PHAs Implementation Agencies Private Sector Businesses Residential Non-profits SEDAC 5

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8 ILLINOIS ENERGY NOW INCENTIVES 9

9 ILLINOIS ENERGY NOW INCENTIVES $3.50>50k therms $4.50>100k therms 10

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11 ILLINOIS ENERGY NOW: SAVINGS THROUGH EFFICIENCY PRODUCTS (STEP) STEP offers qualified public facilities free, high quality, energy saving products for selfinstallation. The STEP program allows public facilities to start saving money right away without an upfront investment, while learning about next steps to becoming more energy efficient. Sign up: Free Products Faucet Aerators Showerheads Pre-rinse Spray Valves LED Exit Signs Indoor LEDs Vending Machine Controls Occupancy Sensors to Control Lighting LED Outdoor Screw-in Bulbs 13

12 SAMPLE PROJECTS: LARGE PARK DISTRICT Product Type Order Count Annual Savings Lifetime Savings Therm kwh Therm kwh Aerator 110 1,360 12,234 CFL Bulb ,850 68,324 LED Exit Sign (A) 18 6, ,055 LED Exit Sign (B) ,652 LED Exit Sign (C 48 16, ,952 LED PAR Lamp 37 10,204 72,859 Occupancy Sensor 60 48, ,842 Low Flow Showerhead 35 2,272 22,717 Vending Machine (R) 21 33, ,359 Vending Machine (NR) 8 2,742 13,710 Total Energy 3, ,127 34,951 1,092,753 Total Est. Savings $35,085 $303,182 14

13 EFFICIENCY IS WORKING Total US energy use has leveled off since 2000 Production is up, imports are down, exports are up.

14 EXAMPLES OF EQUIPMENT HVAC Distribution System RTU Chillers Boilers Controls Steam Traps Furnaces Lighting Motors

15 TOP TEN ENERGY STRATEGIES Loads 1. Lighting 2. Plug Loads (computers, heaters) Heating, Ventilating, & Air Conditioning 3. Ventilation (reduction, heat recovery) 4. Heating, Cooling (condensing boilers) 5. Motors & Pumps (VFDs, turn off) 6. Building Automation 7. Commissioning EXTRA CREDIT: After implementing all of these, consider renewables such as solar and wind. Building Envelope 8. Air Sealing 9. Insulation (roof deck, walls unlikely) 10. Windows (likely very expensive)

16 EXTRA CREDIT Renewables: Plan the infrastructure now for future Select site-appropriate technologies Use to take last step to net-zero Consider a Power Purchase Agreement 18

17 MAP AND PLAN 19

18 PARK DISTRICT SPORTS CENTER Beautiful glass atrium entrance facing west and south however, uncomfortable hot/cold and glare 90,000 sf building $240,000/yr in energy 20

19 VESTIBULES Vestibule with worn weather stripping around exterior (harder to see) and interior doors Note the electric heating unit in the vestibule ideally these spaces would be heated minimally, i.e. a buffer space and ensuring the floor is not snowy & icy In practice, often warm because of lack of control or because in a negatively pressurized building, occupants near the entrance would otherwise feel a blast of air when the door opens 21

20 VACANCY SENSORS Good: Appropriate lighting controls in some spaces Occupancy sensor: Auto-on / Auto-off = bad for yoga Vacancy sensor: manual-on / Auto-off (best for saving energy) Great for racquetball courts 22

21 DAYTIME LIGHTING and uncontrolled 24/7 architectural lighting in many other spaces. Extensive use of metal halide lighting throughout for architectural lighting good application for LED and turn off the lights! 23

22 WINDOWS Good: Double pane windows with aluminum frame and thermally broken 24

23 HVAC SETPOINT HVAC control quandary for park districts comfort expectations of the facility users Weight lifters and other exercisers apparently want to work out without having to sweat. 67 degrees in there is that reasonable? 25

24 POOLS Recommendations VFDs Air and water temperatures Night water setback Pool Covers High efficiency boilers Dehumidification energy recovery 26

25 POOL WATER TEMP AND NIGHT SETBACK The pool water and air temperatures are what drive energy loss through evaporation. The original set point was 88 deg F and they re-set it to 85.5 deg F after a stakeholder process and some trial & error. We also determined that there was opportunity to save energy and reduce wear & tear by setting back the water temp of the pool during unoccupied. The graph shows the level of setback possible based on pool closing/opening times Pool Setback Scenario - Close at 10pm, Open at 11am 82 22:00 0:00 2:00 4:00 6:00 8:00 10:00 27

26 POOL FILTERS & PUMPS Two 15 HP pumps running 24/7 Horizontal Sand Filters Restrictor valve at 40% open Great opportunity for a VFD 28

27 POOL PUMP DESIGN CURVES Pool pumps run 24/7 and are sized for when the filter is clogged. A Variable Frequency Drive (VFD or VSD) will save energy by slowing the pump instead of using a restrictor valve. 29

28 POOL BOILER Hot water boiler for heating pool water 81% rated efficiency Could be condensing at 94-98% eff 30

29 HOT WATER BOILER FOR SPACE HEATING 78% rated efficiency Incentives are available to help with the cost to upgrade to a condensing unit compared to a standard efficiency codeminimum unit. 31

30 SMALL BOILER RETROFIT 20,000 sf building New 94% condensing boiler is tiny Included new basement windows Saved $2,000 in 14-15

31 CONDENSING BOILERS Condensing boilers have PVC flue pipes so they don t corrode due to the acidic wet flue gasses Condensing boilers also require commissioning to determine the best hot water setpoint temperature to ensure the most hours at condensing conditions 33

32 FURNACES Condensing furnaces are 93-98% AFUE. Condensing furnaces have PVC flues since the condensate is acidic. (It would be better if the air intake were piped outside) 34

33 UNIT HEATERS Watch out for uncontrolled heating or inappropriate temperature setpoint in mechanical area unit heaters electric or gasfired 35

34 POOL DEHUMIDIFICATION EQUIPMENT Corrosive conditions: Watch out for old valves bleeding hot water Watch out for for hot gas bypass valves failing 36

35 HVAV - VENTILATION How is fresh air being introduced into the building? Centrally or in each space? Is it modulated? How is it controlled (schedule, CO2, enthalpy)? Outdoor is 400ppm, indoor should be lower than 1100ppm average throughout the day. 37

36 ROOFTOP UNITS Roof top units for space heating and air conditioning and space exhaust 38

37 BUILDING AUTOMATION SYSTEM Antiquated BAS quickly becoming obsolete. Repair parts difficult to find, and will become unserviceable before too long. Because of the state of the BAS, the facility heats and cools 24/7 without temperature set back. Needs control system upgrade. 39

38 KEEP IT SIMPLE: SMALL HVAC 40

39 GYM LIGHTING Recommendations T8/T5HO retrofits are common LED is newer and is coming down in cost LED has an advantage of being more durable to ball impacts Multi-level lighting capabilities Occupancy sensor controls 41

40 NEW LED FIXTURE VS T8 RETROFIT? Hurdles to overcome: Cost ($90 to $20 to $10 to $7) Reduced Savings (32W T8 to 17W LED) Reliability: is it going to fail (or have a short)? Remove ballast, or use a dual-drive? 42

41 EXTERIOR LED LED Parking lot fixtures mainly save energy by having better directionality. Savings of 50-60% are typical. There is also potential for motion sensors, photo cells, and dimming.

42 CASE STUDY NEW CONSTRUCTION: RECREATION CENTER Recreation Center Recommended Strategies beyond code: Install demand control ventilation throughout facility Increase efficiency of mechanical systems Utilize higher performance glazing Add air sealing to building specifications Further reduce lighting power density Recommended Strategies to add: Building Automation System Full building commissioning Bi-level switching in stairs 51% Energy Cost Savings (vs. ASHRAE ) Estimate of $63,969 in DCEO incentives! 44

43 CASE STUDY NEW CONSTRUCTION: RECREATION CENTER Building Type Energy Measures Park District Recreation Center Lighting, HVAC, envelope, DHW Annual Energy Savings $10,643 Incremental Cost $57,152 Total DCEO Incentives $77,467 Simple Payback 5.3 years What they got Prescriptive Incentive for individual measures. They did not model the building due to costs constraints What they did New 39,100 sf recreation center Increased roof and wall R-values Reduce lighting power density by almost 0.3 W/sf High Efficiency GSHP Case study by SEDAC 45

44 ICE RINK Recommended Low emissivity ceiling Ice temperature controls w/ setbacks Reduce ice thickness Floating head pressure controls Heat pump water heating for the Zamboni Replace metal halides lighting with fluorescent Occupancy sensors for lighting Vending power management Ice Rink Building Type Energy Measures Park District Ceiling, Ice maintenance, Lighting, hot water, plug loads Annual Energy Savings $12,620 Total DCEO Incentives $37,000 Total Project Cost $45,890 Granite City Ice Rink Payback 3.6 years

45 CASE STUDY: DECATUR CIVIC CENTER City of Decatur Civic Center Building Type Energy Measures Municipal Civic Center Lighting, Occupancy Sensors, Boiler Pump Controls, Chiller Water Pump, Sequencing Total Project Cost $308,550 EECB Grant $283,054 Total DCEO Incentives $25,496 Final Project Cost $0 Annual Energy Savings $60,000 Payback 0 years Funding DCEO Illinois Energy Now Conservation Block Grant from American Recovery and Reinvestment Act Fully funded 47

46 PUBLICATIONS 48

47 STANDARD/CUSTOM INCENTIVE PROGRAMS PUBLIC SECTOR Standard Custom Efficient Lighting Boilers, Chillers, Furnaces, Air Conditioners HVAC Equipment Tune-Up Variable Speed Drives Programmable Thermostats $/Item installed Any other project that will save energy If there is a standard incentive and you think your situation is saves more energy than normal inquire about a custom incentive $/kwh saved and $/therm saved The objective is to help pay down the cost of using high performance equipment. NOT to pay for it entirely! 49

48 MORE ILLINOIS ENERGY NOW SPECIAL PROGRAMS Energy Efficiency Aggregation Program Application Assistance Savings Through Efficient Products (STEP) Natural Gas Boiler System Program Combined Heat and Power Energy Performance Contracting Low Income Incentive Programs/PHA Lights for Learning Waste Water Treatment Facilities Trade Ally Program And more! 50

49 SUMMARY SEDAC is in place to help identify cost effective energy efficiency solutions for buildings in Illinois We are a first-stop for all your ILLINOIS ENERGY NOW questions Trade Allies are private sector partners to help make changes There are many examples of other owners who have taken advantage of these programs. Get your buildings involved in these programs! Energy Assessments Retro-Commissioning New Construction Design Assistance New Construction Incentives Andy Robinson, CEM, LEED AP Training and Education Director, SEDAC 51

50 Illinois Energy Now

51 ENERGY COST BREAKDOWN Cooling $29,906 17% Kitchen $3,717 2% Water Heating $5,380 3% Fans and Pumps $15,300 9% Lights $32,307 18% Plug Loads $13,338 8% Heating $75,707 45% Envelope $22,698 13% Reheat $24,396 15% Ventilation $28,612 17% Of the 45% spent for heating, about one third is for building envelope losses Lights use more than cooling and have great potential for savings Based on a typical good year In problem year, HVAC is double.