Robert A. McIntyre Director of Technology Joan Smith, Harris Integrated Solutions Energy Solutions Consultant PRESENTATION Dillon School District 3 Lonnie Russell, CEM, REP Latta Energy Project Abraxas Energy Consulting TITLE
PAGE LAYOUT Latta Middle School Stats: • Total student population: 1,600 • 68% reduced/free lunch status • 40% minority • LHS is one of the smallest Latta High School and most successful International Baccalaureate schools • 1957 Gym converted into a new state of the art Fine Arts Center
PAGE LAYOUT Latta Elementary is 100% Montessori
Needed EMS in uncontrolled facilities Needed to replace a problematic, unsupported EMS system in a new facility Needed new HVAC & Lighting Needed to reduce energy costs No Budget PRESENTATION The Challenges How can we make this TITLE happen?
Start with an energy audit Utility payed 50% Develop a Project List that would lower the payback Get Funding! ConserFund Plus Utility Incentives (Over $60,000) PRESENTATION The Solutions TITLE
Clear Goals Willingness to try new things District completed most of the work in-house What made this a PRESENTATION good project? TITLE
PAGE LAYOUT Building Summary
PAGE LAYOUT HVAC Summary
PAGE LAYOUT HVAC Summary WMHPs are very common in the middle school
Set Point too low Manual “hold” PAGE LAYOUT and in manual “hold” Set Point too low and in manual “hold” There are often many issues when thermostats “Emergency Heat” are accessible. These are just a few of the selected findings. A total of 15 were found with some issue. Many thermostats were in “hold” meaning the HVAC system never turns off. Some had the fans in manual causing them to stay on, emergency heat selected (uses 3 times the energy of a heat pump!), and set points that were outside the typical ASHRAE recommended band. An EMS could rectify all these problems. HVAC Findings
PAGE LAYOUT Simultaneous Heating and Cooling in the same space! HVAC Findings Heat Mode Cool Mode There are 4 3-ton heat pump units for the band room. One thermostat is in the band director’s office with the door closed and is in cool mode. The other is out in the main practice space and is in heat mode. The thermostat should probably be moved out of the office and these interlocked to prevent this from happening. An EMS could easily address this issue.
PAGE LAYOUT Lighting Opportunities 59% of all the fluorescent lighting at LMS is still T12, mostly the older section of the building (classrooms) and the hallways. The dance studio and facilities shed are also T12. LHS has T12 in the robotics and agriculture building.
Kitchen PAGE LAYOUT Lighting Opportunities T12 lighting is still being used in all the hallways and the older section of the building (all areas within the red outlined rectangles).
PAGE LAYOUT Lighting Opportunities All the T12 lighting in the middle school, with the exception of the kitchen, is 4-bulb. Not only is this very poor (and quickly becoming obsolete) lighting, it is far too many bulbs for the hallway applications (they can typically be 2 bulb fixtures).
PAGE LAYOUT Lighting Opportunities The metal halide lighting in the gym offers an excellent opportunity for an LED upgrade. The 150w “UFO” fixture would be a good upgrade, requiring no guarding, because of its rugged construction.
Latta Admin Bldg Interior LED lighting Upgrade (IH) PAGE LAYOUT Existing Fixtures Operating Operating Annual Fixture Location Quantity Wattage Total kWh Operating Cost Hours Days Hours Offices, breakroom 26 112 9.5 2,423 255 7,054 $615 T8 4‐bulb Small Conference room 3 112 4 1,020 255 343 $30 Large Conference room, kitchen 15 112 1.5 200 300 504 $44 T8 3‐bulb Bathrooms 2 89 9.5 2,423 255 431 $38 T8‐2‐bulb 9.5 Offices, hallways, copy area 32 59 255 2,423 4,574 $399 Total 12,906 $1,125 Proposed new fixtures Annual Rebate per Cost per Net Cost Fixture Location Quantity Wattage Total kWh Labor hours fixture fixture per fixture Offices, breakroom 26 2,423 $17 48 3,023 $50 $67.36 $0 T8 LED 4‐tube Small Conference room 3 1,020 $67 48 147 $0 $67.36 $0 Large Conference room, kitchen 15 48 300 216 $0 $67.36 $0 $67 T8 LED 3‐tube Bathrooms 2 2,423 $13 36 174 $38 $50.52 $0 T8 LED 2‐tube 2,423 $8 Offices, hallways, copy area 32 24 1,860 $25 $33.68 $0 Total 5,421 $2,184 $4,143 $0 Savings Investment Payback (years) ROI Fixture Location kWh Dollars 1.28 78% Offices, breakroom 4,031 $352 $451 T8 LED 4‐tube Small Conference room 11.83 8% 196 $17 $202 40.23 2% Large Conference room, kitchen 288 $25 $1,010 1.13 89% T8 LED 3‐tube Bathrooms 257 $22 $25 1.14 88% T8 LED 2‐tube Offices, hallways, copy area 2,713 $237 $269 Totals 7,485 $653 $1,959 Combined Payback (in years) 3.00 Combined ROI 33% Total Possible Rebate $2,184 Total avg $/kWh $0.0872 Total T8 Tube Count 246 Total Investment (minus rebate) $1,959
PAGE LAYOUT Total LED Quantities Type Qty UFO 150w 30 Wall Pack 46 T8 12w 2,730 T8 12w dimming 2,238 T8 18w 141 T5 57 Shoe Box Retro Kits 39 Ubend 2
PAGE LAYOUT EC Motors EC motors are very efficient (50% Controls the speed of less wattage than the 2 speed EC motors a typical shaded to slow down to pole motor) and minimum possible can offer multiple speed when the Compressor only operates about 40% of the time, speeds compressor is not the other 60% the Frigitek controller can operate running. the EC motor at a much slower speed, reducing energy consumption by as much as 90%.
PAGE LAYOUT Tankless Water Heater 41% reduction in NG usage! The cafeteria dishwasher is no longer used. The HW load has decreased substantially, and there is a large NG water heater with a recirc pump. There is one sanitizing sink in use. A condensing tankless commercial system would be a strong choice for this application.
PAGE LAYOUT 4-6ton 3ton 5ton HP NG HPs 5ton HP 20ton NG MAU 3ton 5ton HPs HP 5ton 18ton NG HP 5ton HP 5ton 5ton HP HP ARC Controllers
PAGE LAYOUT X LHS Original Meter LHS Gym Meter E E X E LMS Kitchen X Meter E = Electric Meter Locations E LMS Nurses Station Meter = Switch Gear or MDP = NG meter locations X
Power Monitoring SECTION TITLE What this Section Is About
SECTION TITLE What this Section Is About
Rebate Tracker Location Rebate DLC **Rebate Rebate Predicted Duke Offer *Mat'l Mat'l **Proposal Spec Paid Out LMS LHS Type Project Submitted Date Form Form Amount Amt. Ordered Recv'd Quote sheet (Mailed) Admin Elem Custom CSS# Prescriptive # Present Sign Custom Prescriptive Old EPAC Old Gym websit 1 EC motors x x x N/A e 2 4Ton & 7.5Ton ARC controllers x x x N/A x x $1,048 SECTION TITLE 3 7.5Ton ARC controllers x x 0000128789 x x x N/A x 3/4/19 4 20Ton ARC controllers x x x N/A x x $5,460 5 18T ALC controllers x 0000128392 x x x N/A x 2/26/19 6 T5 Lighting (library,Entry) x x 0000123893 x x 10/26/17 $461 $461 x x x x x x 3/23/18 7 T5 Lighting (library) x x 0000122781 x x 10/26/17 $285 $285 x x x x x x 3/23/18 PSS17-0000140648 x 12/4/17 $14,940 $14,940 8 LES tubes x x x x x x x x x 12/29/17 PSS18-0000147463 x x 2/6/18 $1,950 9 LES Parking Lot What this x x x x 4/4/18 PSS18-0000144299 x 2/6/18 $2,150 $2,150 10 LES Wall Packs x x x x x 3/1/18 PSS18-0000151418 11 LES remaining x x x x 4/15/18 $274 $274 x x X x x x 4/25/18 PSS17-0000140655 12 Admin Lighting x x x x 12/4/17 $1,476 $1,476 x x x x x x 12/29/17 Section PSS18-0000143323 13 LMS Lighting x x x x 1/12/18 $4,932 $4,932 x x x x x x 2/13/18 PSS18-0000150306 x 3/20/18 $708 $708 14 LMS Remaining lighting x x x x x x x x x x 4/3/18 PSS17-0000141943 15 LHS Lighting (Acct #5810590512) Is About x x x x x 12/20/17 $10,956 $10,956 x x x x x x 1/11/18 PSS18-0000150238 16 LHS remaining lighting x x x x 3/17/18 $2,094 $2,094 x x x x x x 4/11/18 LHS Gym and Wall Pack Lighting PSS18-0000143324 x x 1/12/18 $6,968 $6,968 (Acct #6446373026) 17 x x x x x x x 2/13/18 18 Vending Misers x x x x x N/A $47,194 $51,752 Totals *Note: Custom material cannot be ordered until the rebate is approved. **Note: Signature and quote typically occur after the work is complete for a prescriptive rebate. Green means the rebate has been dispursed to Latta
SECTION TITLE What this Section Is About
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