The Energy and Education Nexus

January 17, 2013

Presented By:

Neil Case PE, CEM

D-11 Energy Program Manager

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2

D-11 Overview

• Oldest School District in Colorado Springs

• 62 Schools

• 10 Support Buildings

• 4,502,979 square feet

• 758 acres of land

3

Energy Management

History

• Resource Conservation Management Program

– Established in 1998 (Baseline)

– Benchmarking Energy Cost & Usage

– No & Low Cost Saving Initiatives (LHF)

– RCM Avoided Cost 98-12: ~$15.1M

4

Behavioral

Organizational Awareness

Reporting to BOE and EACs

Incentives

Energy Star Awards

Weekly Conservation

Tips

Building Manager Training

User Controlled

Energy Dashboard and

Alerts

Coordination with Rentals

Holiday Shutdown Checklists

Security Energy Audits

Food Services Consolidation

Facilities Controlled

Scheduling

Work Orders

Controls

Construction Standard

Commissioning

Energy Audits

Utility Rate

Natural Gas Purchasing

Water Conservation

Time of Use

Power Factor Correction

Demand Limiting

PV Solar

On Going

Program Initiatives

Benchmarking

5

Energy Management

History

• Energy Audit Performed (2003-2004)

– $5M Energy Performance Contract

– Energy Conservation Measure Analysis

– Air Conditioning Feasibility Study

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Energy Management

History

– Building Envelopes

– Exhaust Fan Control & DCV Upgrades

– Multi-zone to VAV Conversions

– Water Efficiency Upgrades

– Building Automation Upgrades

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Overall Cost

$0.00

$1,000,000.00

$2,000,000.00

$3,000,000.00

$4,000,000.00

$5,000,000.00

$6,000,000.00

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11-1

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Fiscal Year

D-11 Utility Costs

Waste Water Cost Water Cost Natural Gas Cost Electric Cost

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D-11 Energy Cost and Use

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70

80

90

100

110

$0.00

$0.20

$0.40

$0.60

$0.80

$1.00

$1.20

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Us

e (K

BT

U/S

F)

Co

st ($

/SF

)

Fiscal Year

D-11 Energy Cost & Use

Use (kBTU/SF) Cost ($/SF)

Use Trendline Cost Trendline

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FY 11-12 Initiatives

• 32 Energy Star Labels for 2011

• $38,000 in Utility Bill Audit Savings

• Irrigation Controls

• Chipeta Lighting Retrofit

• Natural Gas Purchasing Initiative

• Solar Initiative

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Natural Gas

Purchasing Initiative

-$300,000

-$200,000

-$100,000

$0

$100,000

$200,000

Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12

D-11 Transportation Natural Gas Contract Savings

Cummulative Cost Savings

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Solar Initiatives

• Bristol Elementary

• Columbia Elementary

• Jackson Elementary

• Keller Elementary

• King Elementary

• Rudy Elementary

• Wilson Elementary

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Solar Initiative Projected

$1,500,000 Initial Investment

- $450,000 Rebate

$1,050,000 Net Investment

$84,000 / Year Bill Credit

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50 Year Cash Flow

Projected

($2,000,000)

$0

$2,000,000

$4,000,000

$6,000,000

$8,000,000

$10,000,000

$12,000,000

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51

Cas

hfl

ow

s

Years

D-11 Solar Farm Payback Data@ 5% / Year Utilitiy Rate Inflation

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Solar Initiative Actual

$1,170,000 Construction Cost

- $314,000 Rebate

$856,000 Net Investment

$117,000 / First Year Bill Credit

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Solar Initiative

($5,000,000)

$0

$5,000,000

$10,000,000

$15,000,000

$20,000,000

$25,000,000

1 6 11 16 21 26 31 36 41 46 51

Ca

sh

flo

ws

Years

D-11 2012 Solar Project Savings @ 5% / Year Utilitiy Rate Inflation

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Solar Initiative - Rudy

Quick Facts

System Size: 31 kW

# of Panels: 130

Annual Production:

44,688 kWh

% of Building Use:

16%

D-11 Cost: $48,881

1st Yr Savings:

$17,198

Simple Payback:

3 yrs

Warranty: panels

25yr inverter 20 yr

Roof Penetrations: 0

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Solar Initiative - Rudy

$0

$5,000

$10,000

$15,000

$20,000

$25,000

$30,000

$35,000

$40,000

0

200

400

600

800

1000

1200

Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

Cu

mu

lati

ve C

ost

($)

Pu

rch

ase

d k

Wh

/Day

Rudy Solar ProjectFY 11-12 Estimated Annual Savings of $16,379

Actual Purchased kWh's/Day (ETL Rate) New Purchased kWh's/Day with Solar (E2C Rate)

Rate Threshold FY 11-12 Actual Electrical Cost

FY 11-12 Electrical Cost with Solar and Rate Class Savings New Cost with Savings from Solar Production

Solar Savings

Rate Savings

Average Daily Use = 6 kWh's Over Rate Threshold

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Solar Initiative - Wilson

Quick Facts

System Size: 110 kW

# of Panels: 468

Annual Production:

164,833 kWh

% of Building Use:

45%

D-11 Cost: $265k est.

1st Yr Savings:

$31,464

Simple Payback:

8 yrs

Warranty: panels

25yr inverter 20 yr

Roof Penetrations: 1

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Solar Initiative - Wilson

$0

$5,000

$10,000

$15,000

$20,000

$25,000

$30,000

$35,000

$40,000

$45,000

$50,000

0

200

400

600

800

1000

1200

1400

1600

Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

Cu

mu

lati

ve C

ost

($)

Pu

rch

ase

d k

Wh

/Day

Wilson Solar ProjectFY 11-12 Estimated Annual Savings of $29,695.30

Actual Purchased kWh's/Day (ETL Rate) New Purchased kWh's/Day with Solar (E2C Rate)

Rate Threshold FY 11-12 Actual Electrical Cost

FY 11-12 Electrical Cost with Solar and Rate Class Savings New Cost with Savings from Solar Production

Solar Savings

Rate Savings

Average Daily Use Over Rate Threshold

Kiosk / Dashboard

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Questions