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Published byTrevor Bailey Modified over 9 years ago
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Using Technology to Manage Energy Bob Schoch-Director of Business Administration Tom Schneider-Supervisor of Operations
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Applying Technology to Program Management Data driven decision making –Determine program potential –Prioritize efforts –Monitor performance for sustainability Applied technology –Automated temperature control systems –Technical skills of facilities staff –Retro-commissioning –Future plans
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Determine Performance Gap Although utility costs are less controllable than staffing costs, utilities represent a large expense and may offer a possibility for significant savings. This major expense saw one of the largest percentage increases for 2001-2002 at 13%. In dollars per square foot, utilities increased from $1.15 to $1.30. STUDENT COUNT All DistrictsMore Than 7,000 2001-20022003-2004 Highest 1/3 From $2.04$2.65$1.88 To $1.28$1.43$1.52 Mid 1/3 From $1.27$1.42$1.51 Median$1.15$1.30$1.44 To $1.06$1.16$1.27 Lowest 1/3 From $1.05$1.15$1.26 To $0.60$0.53$0.97 14. Utilities per Square Foot of Instructional Building Space The 2003-2004 PASBO Facilities Benchmarking Report showed that Council Rock SD was at the high end, at $1.80/gsf, of the highest 1/3 of utilities cost per square foot for districts with a student count over 7,000. The median for the group was $1.44/gsf and the lowest at $0.97/gsf.
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Council Rock School District $/GSF Determine Performance Gap – Consultant In 2005, Aramark also provided an energy survey and benchmarking – Performance gap was difference between CRSD at $2.11/gsf and average performance at $1.65/gsf or best performance at $1.34/gsf.
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Jan05 – Dec05 Average 102 kBTU/GSF Jan06 – Dec06 Average 71 kBtu/GSF kBTU/GSF Energy Intensity Change by School Implementing Plans & Monitoring Progress
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Council Rock School District School Performance Through April 2008
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Implementing Plans & Monitoring Progress
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16 52
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X 1,775 off of the road X 1,045 powered for a year Planting 1,525 acres of Our Environmental Contribution (based on prevented carbon emissions)
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Energy Program Principles Results achieved in 30 months with less than $150,000 in capital improvements by applying simple principles to complex systems Principle 1- Turn things off when they are not needed (and nobody will care) (Schools are occupied 10 hours/day for 200 days/yr for 2000 hours in a year of 365 days with 24 hours each or 8760 hours/year. Unoccupied 73% of the hours in a year.) Principle 2- Set temperatures 2 degrees more comfortable than other government and education policies to foster support (Set heating at 70 not 68 degrees and set cooling at 76 not 78 degrees for 27% of the hours in a year. Use deep setbacks 73% of the time.)
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Applied Technology Automated Temperature Control Systems Technical Skills of a HVAC Specialists Retro-Commissioning Future Plans and Abilities
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Automated Temperature Control Systems Remote Monitoring Remote and Onsite Troubleshooting –Wireless Connectivity HVAC Scheduling
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Automated Temperature Control Systems
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Automated Temperature Control Systems – Remote Monitoring Multiple people reviewing operation of the building. Able to monitor operation and building conditions remotely. Able to adjust operation in case of emergency closures (Snow Days).
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Automated Temperature Control Systems – Troubleshooting Remote troubleshooting - If assistance is needed from a higher technical skill, they are able to connect remotely to review operation. Onsite troubleshooting – The ability to troubleshoot the equipment with a wireless laptop. Offers ability to have the equipment right in front of you when it is operating.
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Automated Temperature Control Systems - Scheduling Scheduling can be achieved on a zone or area basis. Individual areas can be scheduled on and off depending upon activities. The District achieves greatest conservation during unoccupied times. It is important to have systems off when not needed.
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Technical Skills of a HVAC Specialists The skills have moved from being a “wrench turner” to a computer user. –Must understand sequence of operations of complicated HVAC Systems. –Must understand the control software and how changes affect operation. –Must have computer skills and understand computer based controls.
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Retro-Commissioning Ensure equipment operates properly. –Ensure sensors are calibrated and responding. –Ensure valves operate correctly. –Ensure equipment turns off and stays off when commanded. Modifying the operation of the building to suit it’s current use. –Rebuild zones, areas and how systems operate. –Have different equipment operate differently. Via CO2 sensors Adjusting temperature settings.
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Future Plans and Abilities Replace site light timers with Direct Digital Controls (DDC) and install photocells. Control electrical demand by having the control system change temperature or lighting as demand increases. Monitor rooms for occupancy with infrared technology. Control the level of lighting in spaces. Control outside air requirements by using CO2 and humidity sensors.
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