Branford Board of Education Conservation Report

Efforts and Results 2001-Present

Mark DemingFacilities Director

Branford Board of EducationNovember 19, 2007

Purpose

• The following slides are a culmination of our past and current efforts to conserve fossil fuels and reduce our electrical consumption.

• In 2001 we set goals to reduce our energy consumption by 20%

Walsh Intermediate HVAC renovation

• PACT agreement with Trane

• 3 new boilers

• New 600 ton centrifugal chiller

• New cooling tower

• Motor replacements/New VFD’s

• New filter Racks

• New Tracer Summit Energy Mgt System

Walsh IntermediateHVAC Results

Electric

• 2001 used 2,780,160 KWH• 2006 used 1,384,320 KWH• 2001 electrical costs $235,299.23• 2006 electrical costs $222,942.63• 2001 KWH cost $0.08464 • 2006 KWH cost $0.16105

Walsh IntermediateHVAC Results

Oil

• 2001 used 80,472 Gallons

• 2006 used 46,859 Gallons

• 2001 Fuel oil costs $80,472

• 2001 per gallon cost $0.876

• 2006 Fuel oil costs $89,714

• 2006 per gallon cost $1.915

Annual Cost Avoidance at WIS

• Average Heating Season before HVAC renovation was 80,000 gallons

• Average Heating Season since HVAC renovation is 38,500 gallons

• Annual avg Savings in Gallons 41,500

• Cost Avoidance at 2007 prices $549,875.00

• 2007 fuel price calculated at $2.65 per gallon

• Based on past five heating seasons

Walsh IntermediateEnergy Star

• During Retro-commissioning audit of WIS during summer of 2007 it was found that the efforts and results of the WIS heating and cooling renovation, lighting retrofit program made WIS eligible for an “Energy Star Rating”

• We are working today in conjunction with Trane to receive that designation for WIS

Walsh IntermediateSolar Roof Initiative

• Due to the extremely high cost of replacing the existing roof at Walsh and meeting the required ½” pitch per foot required by the state for reimbursement. We have sought alternative solutions. We are now investigating the feasibility of having a solar roof installed through a power purchase agreement, this may be accomplished without any capital cost.

WIS Domestic Hot WaterBoiler

• Replacement of failed Boiler with Turbo Max Hot Water System

• Should realize a savings of 15% to 25% over past production of Domestic Hot Water.

Water Conservation

• Auto Faucets- We have installed over fifty no touch auto faucets to date. We have installed two waterless urinals to date and plan on installing at least 20 more each summer

• FASTTM Cleaning Systems and Equipment- FASTTM cleaning technology is a new foam based cleaning process that utilizes foam rather than water to clean. Equipment is now in operation at our High School, Intermediate and one elementary.

On Site Power Generation

CCHP(Combined Cooling / Heating and Power) 4 Micro Turbines 1 Absorption ChillerNet Generation capacity 227kWNet Heating capacity 1,313,000 BTUHeating and Domestic Hot WaterNet Cooling capacity 124-152 tons

Branford High School Tri-Generation

• Installation of Micro-Turbines and Absorption chiller to make electricity and utilize the waste heat to heat the school in the winter months and chilled water for cooling in the summer months.

• Completion of this project and it’s commissioning is anticipated for this coming February.

Projected Benefits of Tri-Generation

• Provides the Town with a standalone power system for use as a shelter in the event of electrical power outage.

• Will provide small amount of savings while paying for equipment and additional savings once equipment is paid for.

• Reduce Town of Branford’s Carbon footprint by over 40 tons.

Renewable Energy Credits

Energy Credits

• Are now available for CHP (Combined Heat and Power) projects such as the Branford High School project.

• These credits can be traded to offset the cost of maintenance and other associated costs of operating the system.

• Initially we believe the value of these credits to currently be around 50K.

Branford High School Retro-Commissioning

• Engineering Audit revealed twenty three (23) Energy Conservation Measures

• Projected annual savings of 517,890 KWH (Kilowatt Hours) @ $0.16105 (currently)or $83,567.24.

• Received $105,000.00 to implement ECM’s. • Received engineering audit at no cost to

Branford. • Branford was first public school in the state to

contract with CL&P and the clean energy fund for this Pilot program

Municipal Lighting Program

• In 2004 Branford Board of Education took part in the municipal lighting program.

• District wide lighting retrofit in 2004 was expected to net an annual savings of 326,937 KWH at .08 in 2004 savings were $26,154.96

• At 2007 cost annual cost avoidance is $52,653.20

Murphy and TiskoElementary

Energy Management Systems• In 2005 an Building Management system was

installed in Murphy and Tisko Elementary Schools.

• Resulting in approx. 17,000 gallons of fuel saved

• Cost Avoidance at 2006 price equals $32,640• Life Cycle cost avoidance 255,000 gallons• Life Cycle of 15 years

Magnetic Water Treatment

• Installation of Bon Aqua water treatment systems at both BHS F wing cooling tower and Sliney Elementary Steam boilers.

• The system installed at BHS was paid for by CL&P and Clean Energy Funds.

• The system at Sliney was installed through operating funds.

• We anticipate additional heating cost savings through out this coming heating season,

Bon Aqua Benefits

• 1. Increased cycles of concentration in cooling systems 2. Increased heat transfer from non-scaled tube surfaces3. Unpolluted discharge coming from blowdown and bleed 4. Less downtime for equipment repairs and maintenance 5. One time cost vs. recurring monthly chemical expenses

• = significant water savings= significant energy savings = environmental compliance = increased production

Results of Conservation WorkDistrict Wide Fuel

• 2001 Consumption at 2006 cost• $432,922.50

• 2006 Consumption at 2006 cost• $324,953.00

• Annual Cost Avoidance $107,969.50• Life Cycle Savings

• $1,619,542.50• Life Cycle of 15 years• Oil savings based on today’s cost $2.65

Results of Conservation WorkElectric

• 2001 Consumption at 2006 cost

• $1,131,564.68

• 2006 Consumption at 2006 cost

• $767,707.00

• Annual cost Avoidance $363,857.68

• Life Cycle Savings

• $5,457,865.20• Life Cycle of 15 years

Budget ImpactElectric

• 2001 BOE Electrical Cost $650,171• 2007 BOE Electrical Cost $792,416• Due to conservation efforts Electrical cost

increases have only impacted our budget by 22% over 6 years or just over 3.6% annually

• Without these efforts we would be budgeting $1,300,342. for electric instead of the current budget of $792,416.

Budget ImpactOil

• 2001 Budgeted 210,000 gallons of fuel at $ 0.88 or $184,800.

• 2007 Budgeted 140,000 gallons of fuel at approx $2.37 or $355,575.00

• Without these efforts we would have had to budget $497,700.

• Since 2001 oil costs have increased more than 169%.