ENERGY CONSUMPTION ASSESSMENT ASSESSMENT 50 BUILDINGS REPORT

PRESENTATION TO LEADERSHIP TEAM

Christine Dennehy, Project ManagerTodd Isherwood Energy ManagerTodd Isherwood, Energy ManagerJoseph LaRusso, Finance ManagerCity of Boston

John PetersonJohn PetersonBill KosikHewlett Packard

©2010 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice©2010 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice

IntroductionThe energy consumption assessment was conducted to aid with evaluation of an Enterprise Energy Management System (EEMS).

The 50 Buildings & the DepartmentsThe 50 Buildings & the Departments• Administration (8 buildings)• Public Safety (5 buildings) • Library (2 buildings)• Schools (35) Schools (35) • City data sources

Building Assessment and Benchmarking• Assessment data sourcesAssessment data sources• Building categories• Energy units• Benchmarking value

Assessments and Results• Department energy consumption assessments – overviews and graphs• Results summary• Recommendations

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Recommendations

The 50 Buildings gList of the top 50 by energy cost • The selected buildings have the highest energy cost to the City

Reviewed over fiscal year 2011 • The review period for the energy use was from July 2010 to June 2011• The data taken on a monthly cycle• Electricity, natural gas, and steam consumption were reviewedy, g , p

4 building departments• Administration – 8 buildings • Public Safety – 5 buildings • Libraries – 2 buildings • Schools – 35 buildings

Data sourcesCit f B t• City of Boston

• Mass Energy Insight – utility billing and use• City Personnel – building information

• National Grid – natural gas NSTAR l t i it

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• NSTAR – electricity• Boston Water and Sewer Commission – water

Building Assessment & Benchmarkingg gAssessment Data Sources - National Averages• Consumer Buildings Energy Consumption Survey (CBECS) – comparisons for

benchmarking buildingsbenchmarking buildings• Building Owners and Managers Association (BOMA) – building energy

consumption source

Building Categoriesg g• The 50 buildings have been reviewed according to 4 main categories:

• Size (square feet)• Primary building activity• Climate zone – Northeast • Other government buildings – Local Government

Energy Units• Measurements by:

• kilowatt hour (kWh) electricity• kilowatt-hour (kWh) – electricity• thousand British thermal units (kBtu) – natural gas & steam

• Units can be interchanged: 3.412 conversion factor

Benchmarking

4

Benchmarking• Provides a general magnitude of the opportunities available• Helps determine which buildings to focus• First step toward improving performance

Department Energy Consumption Assessmentp gy p

Administration – Overview

• 8 buildings reviewed• 8 buildings reviewed

• Primarily office space

• Extended hours of services & operation• Extended hours of services & operation

• City Hall uses steam; others use natural gas

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Department Energy Consumption Assessmentp gy pAdministration – Electricity Use

70

80

City Hall

26 Court Street - Main Administration

Renovations Underway

40

50

60 26 Court Street Main Administration

Curley Community Center

Strand Theatre

Tobin 1481 Tremont Street

Campbell Resource CenterTypical Use

20

30

Campbell Resource Center

43 Hawkins Street

1010 Mass Ave.

Typical Size

Typical Office

-

10

kWh/SQFT

Administration Electricity Comparison of Building Average Energy Use

yp

Typical Climate Zone

Typical Local Government

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Administration Electricity - Comparison of Building Average Energy Use

Department Energy Consumption Assessmentp gy pAdministration – Steam and Natural Gas Use

300

350

City Hall

26 Court Street - Main Administration

200

250

26 Court Street Main Administration

Curley Community Center

Strand Theatre

Tobin 1481 Tremont Street

Campbell Resource Centeram

100

150 Campbell Resource Center

43 Hawkins Street

1010 Mass Ave.

Typical Size

Typical Office

Typical UseSte

-

50

kBTU/SQFT

Typical Office

Typical Climate Zone

Typical Local Government

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Administration kBTU/SQFT - Comparison of Average Energy Use

Department Energy Consumption Assessmentp gy pAdministration – Water Use

50.00

60.00

30.00

40.00

City Hall

26 Court Street - Main Administration

Curley Community Center

Strand Theatre

20.00

Tobin 1481 Tremont Street

Campbell Resource Center

43 Hawkins Street

1010 Mass Ave.

-

10.00

Water/sqft

Typical Water

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Administration Water Use - Comparison of Building Average Use

Department Energy Consumption Assessmentp gy p

Public Safety – Overview

• 5 buildings reviewed• 5 buildings reviewed

• Public Safety space – operations and maintenance are high priority

• Extended hours of services & operation• Extended hours of services & operation

• All Public Safety buildings reviewed use natural gas

• All Public Safety buildings had higher than average natural gas consumption• All Public Safety buildings had higher than average natural gas consumption

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Department Energy Consumption Assessmentp gy pPublic Safety – Electricity Use

400 F t R d

30.0

35.0

400 Frontage Road

Police Headquarters

BFD Headquarters

District A-1 HQ

20.0

25.0

District A 1 HQ

District D-4 HQ

Typical Size

Typical Public Safety

Typical Use

10.0

15.0 Typical Climate Zone

Typical Local Government

-

5.0

kWh/SQFT

P bli S f El i i C i f B ildi A E U

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Public Safety Electricity - Comparison of Building Average Energy Use

Department Energy Consumption Assessmentp gy pPublic Safety – Natural Gas Use

140.0

160.0

400 Frontage Road

Police Headquarters

BFD Headquarters

District A 1 HQ

80.0

100.0

120.0 District A-1 HQ

District D-4 HQ

Typical Size

Typical Public Safety

Typical Use

40.0

60.0

yp y

Typical Climate Zone

Typical Local Government

-

20.0

kBTU/SQFT

bli S f l G C i f ildi

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Public Safety Natural Gas - Comparison of Building Average Energy Use

Department Energy Consumption Assessmentp gy pPublic Safety – Water Use

d

3.50

4.00

400 Frontage Road

Police Headquarters

BFD Headq arters

2 00

2.50

3.00

BFD Headquarters

District A-1 HQ

District D-4 HQ

1.00

1.50

2.00 District D 4 HQ

Typical Water Use for Public Service

-

0.50

Water/sqft

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Public Safety Water Use - Comparison of Building Average Use

Department Energy Consumption Assessmentp gy p

Library – Overview

• 2 buildings reviewed• 2 buildings reviewed

• Library space – public occupancy and services

• Copley Library served by steam; Mattapan served by natural gas • Copley Library served by steam; Mattapan served by natural gas

• Despite differences in both age and size, the kBtu per square foot for both libraries

is higher than averageis higher than average

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Department Energy Consumption Assessmentp gy pLibrary – Electricity Use

25.0

Typical Use

15.0

20.0

Copley Square

Mattapan Library

5.0

10.0 Typical Size

Typical Library

Typical Climate Zone

-

kWh/SQFT

Typical Local Government

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Library Electricity - Comparison of Average Energy Use

Department Energy Consumption Assessmentp gy pLibrary – Steam & Natural Gas Use

800

900

500

600

700

Copley Square

Mattapan Library

Typical SizeTypical Use

200

300

400

yp

Typical Education

Typical Climate Zone

Typical Local Government

Stea

m

-

100

kBTU/SQFT

Library kBTU/SQFT - Comparison of Average Energy Use

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Library kBTU/SQFT - Comparison of Average Energy Use

Department Energy Consumption Assessmentp gy pLibrary – Water Use

4.50

2 50

3.00

3.50

4.00

Copley Square

1.00

1.50

2.00

2.50 Mattapan Library

Typical Water Use

-

0.50

1.00

Water/SQFTLibrary Water Use - Comparison of Average Use

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Library Water Use - Comparison of Average Use

Department Energy Consumption Assessmentp gy p

Schools – Overview

• 35 buildings reviewed• 35 buildings reviewed

• School buildings – student occupancy provided

• 14 school buildings served by Combined Heat & Power (CHP) units• 14 school buildings served by Combined Heat & Power (CHP) units

• Average summer use is low

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Department Energy Consumption AssessmentSchools – Electricity Use

25.0

Mann, Jackson ESCharlestown HSHolland, John ESCleveland, Grover MSMildred Avenue MSParkway Academy of Tech & HealthEnglish HSU

seCentral Kitchen / Hernandez ELC

20.0

English HSBoston Latin JHS/SHSHennigan, James ESCondon, James ESMattahunt ESLee, Joseph ESBlackstone ES

Typi

cal

Madison Park / O’Bryant HS

15.0

Murphy, Richard K-8Quincy, Josiah ESMarshall, John ESAgassiz ESHyde Park Education ComplexMadison Park/O'Bryant HSBurke Jeremiah HS

y

10.0

Burke, Jeremiah HSBoston Latin AcademyEdison, Thomas JHSFredrick Pilot Middle SchoolOhrenberger, William ESOrchard Gardens K-8Harvard-Kent EST h B t A d

5.0Tech Boston AcademyEast Boston HSBoston Arts AcademyKing Jr., Martin Luther MSMcCormack, John MS/DeverBrighton HSBaldwin ELCCH

PCH

PCH

PCH

PCH

P

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

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0.0

kWh/SQFT

Schools Electricity - Comparison of Building Average Energy Use

Central Kitchen / Hernandez ELCExcel HS (South Boston HS)Typical SizeTypical EducationTypical Climate ZoneTypical Local Government

C

Department Energy Consumption AssessmentSchools – Natural Gas Use

180.0

200.0

Mann, Jackson ES (CHP)Charlestown HS (CHP)Holland, John ES (CHP)Cleveland, Grover MS (CHP)Mildred Avenue MS (CHP)Parkway Academy of Tech & HealthE li h HS (CHP)

Hennigan ES

Boston Latin Academy

140.0

160.0

English HS (CHP)Boston Latin JHS/SHSHennigan, James ES (CHP)Condon, James ES (CHP)Mattahunt ES (CHP)Lee, Joseph ES (CHP)Blackstone ES (CHP)

Boston Latin Academy

100.0

120.0Murphy, Richard K-8 (CHP)Quincy, Josiah ESMarshall, John ES (CHP)Agassiz ES (CHP)Hyde Park Education ComplexMadison Park/O'Bryant HS (CHP)Burke, Jeremiah HS

Typical Use

60.0

80.0Burke, Jeremiah HSBoston Latin AcademyEdison, Thomas JHSFredrick Pilot Middle SchoolOhrenberger, William ES (CHP)Orchard Gardens K-8Harvard-Kent ES (CHP)Tech Boston Academy

0 0

20.0

40.0 Tech Boston AcademyEast Boston HSBoston Arts AcademyKing Jr., Martin Luther MSMcCormack, John MS/DeverBrighton HSBaldwin ELCC l K h / H d ELC

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

CHP

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0.0

kBTU/SQFT

Schools Natural Gas - Comparison of Building Average Energy Use

Central Kitchen / Hernandez ELCExcel HS (South Boston HS)Typical SizeTypical EducationTypical Climate ZoneTypical Local Government

CHP=Combined Heat and Power unit

Department Energy Consumption AssessmentSchools – Water Use

4.00

Mann, Jackson ES (CHP)Charlestown HS (CHP)Holland, John ES (CHP)Cleveland, Grover MS (CHP)Mildred Avenue MS (CHP)Parkway Academy of Tech & Health

3.00

3.50 English HS (CHP)Boston Latin JHS/SHSHennigan, James ES (CHP)Condon, James ES (CHP)Mattahunt ES (CHP)Lee, Joseph ES (CHP)

2.00

2.50Blackstone ES (CHP)Murphy, Richard K-8 (CHP)Quincy, Josiah ESMarshall, John ES (CHP)Agassiz ES (CHP)Hyde Park Education ComplexM d k/O S (C )

1 00

1.50

Madison Park/O'Bryant HS (CHP)Burke, Jeremiah HSBoston Latin AcademyEdison, Thomas JHSFredrick Pilot Middle SchoolOhrenberger, William ES (CHP)O h d G d K 8

0.50

1.00 Orchard Gardens K-8Harvard-Kent ES (CHP)Tech Boston AcademyEast Boston HSBoston Arts AcademyKing Jr., Martin Luther MSM C k J h MS/D

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0.00

Water/sqft

Schools Water Use - Comparison of Building Average Use

McCormack, John MS/DeverBrighton HSBaldwin ELCCentral Kitchen / Hernandez ELCExcel HS (South Boston HS)Typical Education

Results SummaryO ll• Overall

• The energy use per building exceeds the averages for region, size, primary use, and owner category

• Examples of highest users per SQFT: City Hall, Copley Square, Mattapan Library, p g p y , p y q , p y,Strand Theater, 43 Hawkins Avenue.

• Electricity• Most of the buildings within each of their categories exceeded all of their categorical

averages for electrical consumption or offset the electricity use with natural gas (CHP)averages for electrical consumption or offset the electricity use with natural gas (CHP)• Since the energy cost for these buildings is also considered high, this was not unexpected

• Natural Gas • 88% of the buildings that were evaluated exceeded even the highest kBTU/SQFT average88% of the buildings that were evaluated exceeded even the highest kBTU/SQFT average• This consumption was used primarily for heating• School consumption also includes gas consumption to generate electricity

• Water Use • Most of the buildings met or were lower than average• Those that exceeded have additional water and sewer loads (swimming pools, etc.)• Reduction of water use would also reduce sewer costs

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Recommendations• Perform Building Audits

• Detailed audits of the buildings should be performed to make more detailed observations and determinations for energy savings

• The American Society of Heating Refrigeration and Air-conditioning Engineers (ASHRAE) has developed audit levels based on different levels of depth

• Recommended: minimum ASHRAE Level 2 Audit

• Reviews the building with more detail to develop a clear and concise report that describes a variety of energy conservation measures (ECMs), usually with rankings based on cost to implement

• Allows evaluation of the ECMs and how and when to proceed with implementation

• Some EEMs may be no or low cost; others would need to be further evaluated to determine whether the return-on-investment is feasible

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Recommendations• ASHRAE Auditing Levels

• Relationship of Energy Audit Levels 1, 2, & 3 (ASHRAE 2011)

RecommendedRecommended

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QUESTIONS?

THANK YOU

©2010 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice©2010 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice