1

Managing Energy in San Antonio Public Buildings

Leading by Example

Philip Gates, CEM, CMVP, EIT

Energy Manager

H

ow t

o b

egin

?

Energy Management Responsibilities

3

Municipal Facility Retrofits

Energy Reporting

Measurement & Verification

Municipal Energy Design & Standards

City-Wide Energy Codes and Policies

Public Buildings: By the Numbers

4

15,000,000 sqft of building area

P

ub

lic

Bu

ild

ings

:

By

the

Nu

mb

ersTotal facility sites: 657

Owned & operated: 346

Public Buildings: By the Numbers

6

Elec-tric-ity; $23

Nat-ural gas; $2

Water; $4

Steam &

chilled wa-ter, $5

Annual Utility Costs:(in millions)

$34

Utility accounts:249 natural gas

2,125 electric885 water

4 steam/CHW

Public Buildings: By the Numbers

7Sep

200

7

Mar

200

8

Sep

200

8

Mar

200

9

Sep

200

9

Mar

201

0

Sep

201

0

Mar

201

1

Sep

201

1

Mar

201

2

Sep

201

2

Mar

201

3

Sep

201

3

-

2,500,000

5,000,000

7,500,000

10,000,000

12,500,000

15,000,000

17,500,000

20,000,000

22,500,000

25,000,000

27,500,000

-

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

500,000

City of San Antonio Energy Consumption

Electricity

Natural Gas

Ele

ctri

city

Con

sum

pti

on (

kW

h)

Gas

Con

sum

pti

on (

CC

F)7 year

low

-4% vs. 2012

Mun

icip

al R

etro

fits

: Im

pact

Pro

ject

s co

mpl

eted

/und

erw

ay (

5 ye

ars) Total Projects 398

Total Facility Sites Improved 180

Capital Investment $36,127,097

Avoided Cost, $/yr $4,219,509

Rebates Received $5,427,701

Simple Payback, years 8.7 / 3.1

Electricity Savings, kWh/yr 58,227,372

Natural Gas Savings, CCF/yr 69,095

Emissions Reductions

tons C02e/yr 24,263

lbs NOx/yr 26,731

lbs VOCs/yr 596

Projects Accomplished & Underway

9

Immed. 1yr 3yr 4yr 5yr 9yr 25yr

Retro-Commissioning• Low-$ system tune-ups• 5 buildings, 3M sqft• $316K annual savings

PC Energy Mgmnt• Software solution• 6,500 devices• $200K annual savings

Pool Pump Control• Stop over-circulating• 24 Public Pools• $70K annual savings

LED Street Lighting• Replace high wattage fixt.• 25,000 fixtures• $, kWh annually

Chillers & DX Units• Eff. equip. w/ control• 40 buildings• $154K annual savings

Exterior Lighting• Fluor., LED• 108 sites• $155 annual savings

Interior Lighting• Fluor., LED, control• 135 sites• $1.5M annual savings

Window Film• Reduce solar heat gain• 39 buildings, 184Ksqft• $289K annual savings

Municipal Facility Retrofit Strategy

1. Continuously benchmark facility energy use

2. Prioritize facilities Heavy usage High public visibility

3. Conduct energy assessments

4. Self-manage retrofits, quick payback first

5. Measure & verify utility savings (avoided cost)

6. Revolve energy savings and rebates

Comprehensively retrofit all facilities 10

Best Practices: Technical & PM

Develop in-house expertise

Train building operators; preventative maintenance

Install control systems your staff can operate

Exercise a robust compliance protocol Quality control and field verification is essential

11

Best Practices: Technical & PM

Benchmark all buildings with significant energy use

Measure & Verify utility savings (in-house) Large portfolio: whole building utility bill analysis, IPMVP Option C

Follow life-cycle forcapital-intensive upgrades

Commission or functionallytest every project

Simple Solutions: Set points,operating hours, equip. right-sizing 12

13

1895 1905 1915 1925 1935 1945 1955 1965 1975 1985 1995 20050

25

50

75

100

125

150

175

200

225

250

275

300

ConventionCenter

HamiltonCommunity

Center

WestsideYMCA

Public SafetyTechnology Center

North PoliceSubstation

Nueva StreetMarina

StormwaterOperations

City Hall

EmergencyOperations

FireHeadquarters

InternationalCenter

MunicipalPlaza

SoutheastService Center

SemmesLibrary

ParmanLibrary

Energy Performance of Municipal Facilities by Year Built

Clinic Entertainment/Culture

Fire Station Library

Office Other

Parking Garage Police Station

Recreation Social/Meeting

Year Built

En

ergy

Use

In

ten

sity

(k

Btu

/sq

ft/y

ear)

NationalAveragesby Type

H

igh

En

ergy

Use

Low

En

ergy

Use

Best Practices: Financial

Budget is war: Know thy CFO, budget director, & budget analyst

Tell the full fiscal impact of your work: Reduced energy costs

Accomplished deferred maintenance projects

Reduced operation and maintenance costs

Review bills monthly & know thy rate categories

Exercise fiscal temperance with savings

Incur no debt & always be cash-positive

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Seed Funding

Implement Retrofits

Quantify Utility

Savings

Appropriate Savings &

Rebates

Energy Efficiency

Fund

$$

15

General Fund

2 Different Approaches to 1 Project

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Self Managed Performance Contract

Materials & La-bor

3163645 3907918

Engineering 214843 312640

Project Manage-ment

69520 390813

Overhead 7955 703420

Profit 0 390813

M&V 108395.315274509 301514.421429602

Debt Service 0 1722773

$500,000$1,500,000$2,500,000$3,500,000$4,500,000$5,500,000$6,500,000$7,500,000$8,500,000

Proje

ct

Co

sts

$3.6M

$7.7M

$6.0M

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Recommended Free Resources

ENERGY STAR Portfolio Manager

Noesis Energy’s M&V platform

EVO measurement & verification guidelines

SECO LoanSTAR revolving loan fund

SECO QuickCalcs Spreadsheets

DOE State and Local Energy EfficiencyAction Network (SEE Action)

DOE eQuest energy model

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Thank you!

Philip Gates, CEM, CMVP, EITEnergy Manager(210) 207-1444

philip.gates@sanantonio.gov