energy consumption assessment - boston.gov energy... · the energy consumption assessment was...
TRANSCRIPT
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
HP Confidential2
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
HP Confidential3
• 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
HP Confidential5
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
HP Confidential6
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
HP Confidential7
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
HP Confidential8
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
HP Confidential9
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
HP Confidential10
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
HP Confidential11
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
HP Confidential12
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
HP Confidential13
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
HP Confidential14
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
HP Confidential15
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
HP Confidential16
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
HP Confidential17
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
HP Confidential18
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
HP Confidential19
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
HP Confidential20
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
HP Confidential21
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
HP Confidential22
Recommendations• ASHRAE Auditing Levels
• Relationship of Energy Audit Levels 1, 2, & 3 (ASHRAE 2011)
RecommendedRecommended
HP Confidential23
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