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%

• Total of $120,000.00 in capital cost to date

Walsh Intermediate HVAC renovation scope

• Replace 31 year old equipment• PACT agreement with Trane• 2 new boilers, with DHW• 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”

• Received in January 2008 scoring 100 of a possible 100.

Branford High School Tri-Generation

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

• Project completed with commissioning scheduled for February 28, 2008.

• 250k sq ft facility

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

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 (40k-80k) while paying for equipment and additional savings once equipment is paid for.

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

Economic Factors Considered

• Renewable energy credits

• Energy efficiency credits

• No capital costs

• Utility Incentives (Natural Gas distribution charges waived)

• DPUC grant

Other Energy Initiatives

• Municipal Lighting Program (CEEF)• Bon Aqua treatment (magnetic water treatment)• Retro Commissioning program• Expanded Tracer Summit BAS to other schools• Demand response participation• Solar Roofing (In Process)• Dual Fuel

District Overview

• High School 1100 students

• Intermediate School 1200 students

• 3 Elementary Schools 800 students

• 3 additional buildings, preschool, SACC, Special Ed and Administrative

Results of Conservation WorkDistrict Wide Oil

• 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%.