LIBRARY ENERGY WALK- THROUGH Andy Robinson, Training and Education, SEDAC
ILLINOIS ENERGY NOW University of Illinois 360 Energy Group 2
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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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
ILLINOIS ENERGY NOW INCENTIVES 6
ILLINOIS ENERGY NOW INCENTIVES $3.50>50k therms $4.50>100k therms 7
NEW PROMOTIONS ANNOUNCED 2016-2017 Standard and Custom Incentive Program: 1) Waive $300,000 building cap for all facilities. The IL ENERGY NOW Standard and Custom Incentive Programs are waiving the $300,000 building cap for all facilities. If possible, break up large projects into multiple applications not to exceed $150,000 each. 2) The IL ENERGY NOW Standard and Custom Incentive Programs are lifting the incentive cap from 75% of the Total Project Cost to 100% of the Total Project Cost for applications from all State and Federal facilities and school buildings which have never participated in the Standard and Custom Incentive Program received after December 1, 2016. Total Project Cost = Equipment + Labor. If you are unsure whether your building has previously participated in the Standard or Custom Program, please contact Lisa Teubner at Illinois.energy@illinois.gov or 217.785.7440. 8
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: www.illinoisstep.org 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 9
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BOILER PROGRAM Boiler Tune-Ups Pipe Insulation and Removable Pipe/Valve Insulation Steam Trap Surveys Steam Trap Repair and Replacement of malfunctioning traps that are leaking steam Boiler Reset Controls Shut-off Air Dampers Parallel Positioning Controls Systems (Linkage-less) https://www.illinois.gov/dceo/whyillinois/targetindustries/energy/pages/publicsectornaturalgasboilertuneup.aspx 11
KEEP IT SIMPLE: SMALL HVAC 13
EFFICIENCY IS WORKING Total US energy use has leveled off since 2000 Production is up, imports are down, exports are up. http://www.eia.gov/beta/mer/
EXAMPLES OF EQUIPMENT HVAC Distribution System RTU Chillers Boilers Controls Steam Traps Furnaces Lighting Motors
TOP TEN ENERGY STRATEGIES 1. Upgrade lighting & establish controls 2. Evaluate humidification needs 3. Program thermostat setbacks 4. Use computer power management 5. Install vending occupancy controllers 6. Implement demand control ventilation (DCV) 7. Upgrade to high-efficiency HVAC 8. Perform HVAC tune-up 9. Develop an energy management plan 10.Install variable frequency drives (VFDs) EXTRA CREDIT: After implementing all of these, consider renewables such as solar and wind.
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 17
ONGOING COMMISSIONING IS FOR EVERY BUILDING Requires a full-time energy watchdog Nights, weekends, holidays You can t turn things off when you aren t around Someone to put eyes on all the dampers, valves, VFDs, boilers, chillers, and plug loads Potential for 10-25% savings 19
100 80 AHU 2 and associated VAV box 201 VAV Damper Reheat Coil 60 40 20 0 Supply Fan Outside Air Damper 12:00:00 AM 1:10:00 AM 2:20:00 AM 3:30:00 AM 4:40:00 AM 5:50:00 AM 7:00:00 AM 8:10:00 AM 9:20:00 AM 10:30:00 AM 11:40:00 AM 12:50:00 PM 2:00:00 PM 3:10:00 PM 4:20:00 PM 5:30:00 PM 6:40:00 PM 7:50:00 PM 9:00:00 PM 10:10:00 PM 11:20:00 PM 12:30:00 AM 1:40:00 AM 2:50:00 AM 4:00:00 AM 5:10:00 AM 6:20:00 AM 7:30:00 AM 8:40:00 AM 9:50:00 AM 11:00:00 AM 12:10:00 PM 1:20:00 PM 2:30:00 PM 3:40:00 PM 4:50:00 PM 6:00:00 PM 7:10:00 PM 8:20:00 PM 9:30:00 PM 10:40:00 PM 11:50:00 PM 12/9/2011 12/10/2011 System fans do not throttle down at night Outdoor air % stays high 40% VAV boxes stay open Night setpoints are the same as the day setpoints Reheat runs excessively through the night
AVERAGE KW DEMAND Holidays are lower, but what s staying on past 6pm? 21
UTILITY DATA More is better than less Multiple years can illustrate anomalies Changes in consumption other than weather related may be highlighted Identify potential summer gas reheat, winter electric steam humidification Preparation for site visit Electricity Usage (kwh) Natural Gas Usage (Therms) 250,000 200,000 150,000 100,000 50,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 0 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12 Jul-12 Aug-12 Sep-12 Oct-12 Nov-12 Dec-12 Jan-13 Feb-13 Mar-13 Apr-13 May-13 Jun-13 Jul-13 kwh CDD Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12 Jul-12 Aug-12 Sep-12 Oct-12 Nov-12 Dec-12 Jan-13 Feb-13 Mar-13 Apr-13 May-13 Jun-13 Jul-13 1,000 800 600 400 200 0 200 400 600 1,150 950 750 550 350 150 Heating Degree Days Cooling Degree Days therms HDD
ENERGY USE PER SQUARE FOOT 24
ENERGY COST BREAKDOWN Lighting is typically around 20% Cooling is surprisingly large Heating is smaller than expected since there is a lot of electric heat from fans and pumps running 24/7
NEW CONSTRUCTION: DEKALB LIBRARY Incentive Rate Energy Saved Square Footage Incentive (before 10% deduction) Incentive (after 10% deduction) Beyond Code Electricity $0.08/kWh 194,455 kwh $ 15,556 $14,001 Beyond Code Natural Gas $2.00/therm 6,084 Therms $ 12,167 $10,950 High Performance Design $0.40/sf for Bonus 23% Beyond Code 64,082 sf $25,633 Total Incentives $ 50,584 Total Incentives per sf $0.79/sf Historic building renovation (1/3) + New addition (2/3) total 64,082 sf Baseline Proposed Savings % of Annual Total Saved Total Energy (kbtu) 4,724,024 3,452,191 1,271,834 27% [Energy] Total Energy Cost $92,453 $71,513 $20,940 23% [Cost] 26
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LED ceiling tile lights 29
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EXISTING BUILDING AUDITS 31
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SOLAR TUBES 33
DIMMING BALLASTS 34
INSTALL DAYLIGHT HARVESTING SENSOR Existing: skylights provide sufficient natural daylight but all lights are on Recommendation: install daylight harvesting sensor 35
REDUCED WATTAGE: 32W T8 TO 25W T8 Existing: 32W T8s Recommendation: replace 32W T8s with 25W T8s 36
REPLACE MH WITH LED Existing: 175W-400W Metal halides Recommendation: replace MHs with LEDs 37
MEASURE LIGHTING LEVELS Measure lighting levels: Historically, IES has recommended 20-50 fc for libraries (i.e. over 100 is excessive) 38
LED SPOTLIGHTS PAR16 lamps come in a variety of bases 39
MULTI-LEVEL SWITCHING
LED 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? 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.
SERVER ROOMS Server rooms can be energy hogs Recommendations: Server virtualization (going to sleep) Off-site servers may be more efficient Separate HVAC for that room Raising the temp of the room Data center Expert Program 43
ILLINOIS ENERGY NOW: DATA CENTERS Data Centers The Data Center program helps public facilities identify energy saving opportunities and apply for rebates for qualifying technologies. A program engineer can visit your data center or server room, provide a high-level analysis to identify recommendations on energy efficiency measures, determine potential energy savings, and assist with ILLINOIS ENERGY NOW incentive applications. ComEd service territory only. 44
COMPUTER POWER MANAGEMENT Existing: computer are on all day Recommendation: change computer power setting to sleep or hibernate mode Save $30-$50 per computer by going to sleep after 20min 45
BOILERS - LARGE This 1960 steam unit has a new burner with an O2 sensor and separate gas and air controls to optimize burner efficiency. +2% Options: -Boiler Tune Up -O2 Trim controls -New Boilers -High Impact Incentives 46
BOILERS - MEDIUM 47
SMALL BOILER REPLACEMENT 20,000 sf building New 94% condensing boiler is tiny Included new basement windows Saved $2,000 in 14-15
HYBRID BOILER ECRM 4: Add a Condensing Boiler Supplement the two original boilers with a high efficiency modular condensing unit. This will run at peak efficiency during most of the low-load heating hours. ECRM 4 Annual Savings kwh kw therms Energy % $ Estimated Cost Add a Condensing Boiler 0 0 20,632 9% $18,133 $50,000 Gas for heating $75,000/yr Full engineering analysis is necessary. Isolate the two old boilers with valves. AKA: Shoulder Boiler or Front-Loaded Boiler Full upgrade is always an option if funds allow.
LARGE HVAC 50
STEAM HUMIDIFICATION Steam (or electric) humidification is very energy intensive (and likely not necessary) According to the American Public Library Handbook, humidification systems are generally only needed in spaces that house delicate collections. -Marco, Guy A. (2011). The American Public Library Handbook. 51
STEAM TRAPS Float steam trap testing with IR camera and ultrasonic probe. Up to 30% failed open is common But this client was already proactive with maintenance
CHILLERS AND COOLING TOWERS 53
WALL TO ROOF JUNCTION AIR SEALING PRE-RETROFIT POST AIR SEALING From SEDAC report After Air Sealing
EXAMPLE: ENVELOPE PROBLEMS Occupants were cold No continuous insulation Don t underestimate the impact of thermal bridging This is not easy to change once the building is occupied
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 56
Illinois Energy Now 800.214.7954 www.ilenergynow.org 57