new buildings institute, southern california edison, garden grove … · 2017-12-08 · • the...
TRANSCRIPT
November 28, 2017
New Buildings Institute, Southern California Edison, Garden Grove Unified School District, DNV GL, NORESCO, San Bernardino Community College,
Cadmus Group & Lincus
Welcome & Introductions
Introduction to Zero Net Energy
©2017, New Buildings Institute
Zero Net Energy (ZNE) Definitions• Time Dependent Value (TDV):
ZNE Code Building in California
• ZNE Site: A building that produces at least as much energy as it uses in a year, when grid-supplied energy is accounted for at the site boundary
• ZNE Source: A building that produces at least as much energy s it uses in a year when grid-supplied energy (including primary energy for generation, transmission and delivery to the site) is taken into account
• Definitions vary! Time Dependent Valuation graphic source: Heshong Mahone Group, 2002 at
http://h-m-g.com/Projects/TDV/TDVDefault.htm
©2017, New Buildings Institute
Code Cycles to Net Zero in California
Source: SCE & AEC, 2009
©2017, New Buildings Institute
Why Zero Net Energy Schools?
• The next evolution in sustainable, high performance buildings
• Redirect money from utility bills to classroom
• Create comfortable and productive environment for teachers and students
• Provide hands-on, tangible learning opportunities for 21st century skills
• Make schools and communities stronger, resilient and energy independent
Edith Green-Wendell Wyatt Federal Building, ORPhoto Courtesy: Balfour Beatty Construction
Hood River School District Science Building| Hood River, OR
All Rights Reserved © 2017 New Buildings Institute
The 2016 List of ZNE Buildings
332 ZNE
150 ZNE
50 ZNE
All Rights Reserved © 2017 New Buildings Institute
The 2017 List of ZNE Buildings
332 ZNE
150 ZNE
50 ZNE
November 2017: 63 verified
379 emerging
445 ZNE
©2017, New Buildings Institute
The largest database on ZNE buildings in North America and the only database searchable by ZNE Status & Energy Performance http://newbuildings.org/getting-to-zero-buildings-database
©2017, New Buildings Institute
Where are ZNE
Projects?
©2017, New Buildings Institute
ZNE Buildings in Every Climate Zone
©2017, New Buildings Institute
Schools are Leading
©2017, New Buildings Institute
ZNE and Ultra-Low Energy in EducationTo
pic
2
K-12 Schools
Libraries
Higher Education
Science Centers
Community Colleges
©2017, New Buildings Institute
2017 ZE Schools: Top Five States
StateZE
VerifiedZE Emerging
Ultra-LowEnergy Verified
Grand Total
CA 2 27 6 35
KY 2 3 4 9
NC 1 4 2 7
TX 0 5 1 6
SC 0 5 0 5
Total 11 63 20 94
©2017, New Buildings Institute
Growth of ZNE Educational Buildings
SCE and SCGProp 39 ZNE Pilot Project
Efren Villasenor P.E. – Engineering Project ManagementRobert Arredondo – Demonstration and Pilots
Southern California Edison
November 2017
17
Prop 39 ZNE Pilot Overview
Program Goals
• Leverage Prop 39 funds
• Retrofitting “existing” buildings in public schools & community colleges
• Establish “Proof of Concept” of feasibility across California
• Document findings & Best Practices
• Future Program Development
Prop 39 ZNE Value to the Schools
• Socialize awareness to Stakeholders
• District staff members, teachers, students, parents, & community
• Design Assistance
• Training
• Implementation & on-going maintenance of these retrofits
18
Prop 39 ZNE Rounds 1 and 2 Screening
Selection Criteria
• Potential to reach an EUI of 16-22 kBtu/sqft/year after measures are applied
• Project currently has Prop 39 funding or other Non-Prop 39 funds
• Onsite renewable will be installed at the site.
• Funded separately from ZNE Pilot
• Must meet Prop 39 ZNE Pilot Schedule
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Achieving ZNE
Target-setting for the whole
building energy footprint
Designing to the target footprint
Building to the design
Monitoring, diagnosis and
correction
Utilities have observed that ZNE buildings can be achieved only by way of an integrated, multidisciplinary design process that includes:
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Utility Support
Design Consultation
Construction Inspection and Commissioning
Support
Incremental Cost Buy Down
Monitoring, Diagnosis,
Correction and Validation
Coordination with Prop 39
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CEC Loading Order
22
Energy Hierarchy
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Prop 39 ZNE Pilot Projects – Southern California
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Prop 39 ZNE Pilot Schedule – Southern California
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Mission Possible! Retrofitting Schools to ZNE
Margaret Brown, Facilities Director, Garden Grove USD
2017 California Green Schools & Community Colleges Summit
November 28, 2017
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Garden Grove Unified School District (GGUSD)
� Large: Top 100 districts in US by enrollment
� Low-Income: 70% of students are eligible for Free & Reduced Price Meals (FRPM)
� High-Performing: Of California’s 140 districts with +65% FRPM, GGUSD is highest-performing district for Math & ELA on state’s 2017 SBAC test
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GGUSD ZNE Project Team
Santiago HighScience Building
Ralston IntermediateMPR & Kitchen
Sources of GGUSD Funding for ZNE
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� Modernization Bond Funds: $858 Million
� One-time Capital Facilities Funds: $130 Million
� Proposition 39: $11.5 Million
� CREBs for PV Solar: $16.8 Million
GGUSD’s Path to ZNE
� District Culture of Frugality
� Modernization Plan
� Proposition 39
� Installing HVAC District-wide
� Prop39 ZNE Pilot for Schools
29
GGUSD Process to Approve ZNE Pilot
� Climate Resolve
� GGUSD Facilities & Business Services
� Campus Stakeholders
� GGUSD Superintendent & Board of Education
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Celia King-Scott – DNV GL
Santiago High School – Building Y
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Stakeholder Engagement Planning and Design ApproachProject Goals & Energy TargetsBaseline CalibrationLoad Assessment Energy Efficiency Strategies & FeaturesRenewable EnergyOccupant EngagementResults Challenges in the Process
What we’ll cover?
33
Stakeholder Engagement
Integrated Design Process
Goal Setting
Program Influence
Identify Next Steps & Action Items
34
Task 1
• Design recommendations and assistance
• Energy modeling
• Construction support
Task 2
• Measurement and verification plan development
• Measurement and verification plan implementation, monitoring, diagnosis, correction and validation
Task 3
• Data collection and organization
• Calibration of energy model
• Final report
Planning and Design Approach
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Retrofit of an 8,096 square feet, science classroom
Project Goals & Energy Targets• Building Y to operate as a zero net energy building (source Zero Net Energy)
• Install replicable and scalable systems & measures for the school district
• Low cost
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Monthly Electric Energy Use
Electric Submeter Data (kWh) Calibrated Model
Baseline CalibrationThe below graph shows that the electric energy use in the model
was calibrated to match the electric sub-meter data within 2% of
the annual electric energy use.
37
Load AssessmentThe chart below it shows the existing building’s breakdown of energy
use. The largest consumers of energy are the plug loads and lighting –
these are the best opportunities for savings with energy efficiency
measures
[CATEGORY NAME]
[PERCENTAGE]
[CATEGORY NAME]
[PERCENTAGE]
[CATEGORY NAME]
[PERCENTAGE]
[CATEGORY NAME]
[PERCENTAGE]
38
Energy Efficiency Strategies and Features
Roof:Adding R-30 insulation and reflective surfacing with SRI of 112
Windows:Replace windows with improved thermal properties
Natural Ventilation:
Use operable windows when the outdoor temperature is within the comfort zone
Lighting: Upgrade to LED LightingLighting controls:
Install occupancy sensors in classrooms and common areas
Daylighting:Install Solatubes (2-3 per classroom) and daylighting controls.
Gamification:
Use competition amongst classrooms to lower overall energy use
Thermalcomfort:
Increase comfort zone by adjusting HVAC setpointtemperatures
HVAC:
Upgrade to a higher performing DX Cooling (4 ton @ 16.4 SEER; 6 ton @ 13 EER/20.3 IEER) & improved heating efficiency (82%) with a differential dry bulb economizer
39
Renewable Energy ZNE Source instead of ZNE TDV definition:
- CPUC sent out approval to use ZNE Source definition in ZNE
calculations for Prop 39 program
- Statewide IOU Prop 39 Pilot, ZNE Source is defined as:
‘A building that produces as much energy as it consumes over the
course of a year, when accounted for at the energy generation
source’
49 49 49 48 40 39 38 37 36 36
0
15
30
45
60
So
urc
e Z
NE P
V R
eq
uir
ed
(k
W)
40
Occupant Engagement• Students are more likely to stay alert and awake with access to fresh air
• Interior and exterior temperature sensors used to signal a colored light
indicating to the occupants when the windows should be opened or
closed
• Instructional signage in each classroom
• Classrooms are comfortable without AC on and windows open for 16% of
the occupied hours
…results in a 12% reduction in compressor and fan energy
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Total Utility Cost Savings ($/yr)
EUI(kBtu/sf/yr)
PV Size - ZNE (kW)
Roof -$3 34 51
Windows & Natural Ventilation
$207 33 50
Lighting $1,763 28 43
Occupancy Sensors $177 28 42
Solatubes & Daylighting $317 27 41
Gamification $262 26 40
Comfort Zone $196 25 38
HVAC $57 25 38
Cumulative for Retained Measures
$2,958 25 38
ResultsCurrently predicting a payback for the building of 13 years
44
Challenges in the Process • Wall upgrade was removed from the design due to payback too high
• Modeling analysis did not predict high energy savings from this measure
• 8’ roof overhang that shades the exterior walls
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PROP 39 ZERO NET ENERGY AT RALSTON IS BLDG K
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BUILDING AND PROJECT CHARACTERISTICS
� Building K is a combination Multi-Purpose Room and
Central Kitchen
� Relatively high EUI due to Kitchen equipment
� Typical MPR and Kitchen operating hours
� No windows or HVAC in MPR
� Poor ventilation in Kitchen
� A construction project planned for summer 2017 was
already to include some energy retrofits
� Some portions of construction project were to increase building
EUI
� ZNE team worked quickly to leverage planned projects to add EEMs
47
ANALYSIS AND PROJECT DEVELOPMENT
Information gathering:
� Utility bill analysis
� On-site electric data logging� Pre-, during-, and post-construction (summer/fall 2017)
� Faculty/administration interviews
� Typical equipment operation
� Occupied/unoccupied schedule (daily/weekly/annually)
� Walkthrough inspection for ECMs
48
INITIAL REVIEW
� Identify:� Shortcomings in design, operation, and
equipment condition
� Opportunities for reducing energy
footprint
� Analyze:� Energy usage
� End-use breakdowns
� Energy efficiency measures
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SOME INITIAL OBSERVATIONS AND OPPORTUNITIES
Exhaust fan duct disconnected Old LF fixtures
Poor exhaust hood design
Old refrigeration components Standard efficiency domestic water heater
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ALIGNING OPPORTUNITIES WITH GOALS
� ECMs for ZNE must be:
� Reliable – does the ECM technology have a proven track
record?
� Scalable – does the ECM have potential across the
entire portfolio of similar facilities?
� Constructible – cost, aesthetics, functionality,
building/equipment uptime, etc.
� Have a reasonable payback – high confidence in the
ECM’s ability to return savings vs. initial cost.
Other factors such as tenant comfort, code requirements, etc.
may also be important.
51
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Following the initial analyses of building energy usage and
inspections of building equipment and operation, several energy
conservation opportunities were identified and further developed.
� Refrigeration Equipment
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OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Lighting Upgrade� Prop 39 program team consulting led to voluntary upgrade of kitchen lighting.
53
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Solar Tubular Daylighting Devices and Lighting Controls� The summer 2017 construction project for Ralston IS Building K included new LED
fixtures throughout the MPR to replace the existing linear fluorescent fixtures.
� Through the Prop 39 ZNE program, an ECM was designed to add solar tubular
daylighting devices in the MPR along with lighting controls, including light level
sensors and automatic dimming.
54
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Kitchen Exhaust Fans� Old fans and motors past useful life
� One of three fans not operating
� Duct separated from fan suction of an operating fan
� Poor exhaust air flow from kitchen
Exhaust fanExhaust fanExhaust fanExhaust fan Exhaust fanExhaust fanExhaust fanExhaust fan
with housingwith housingwith housingwith housing duct disconnectedduct disconnectedduct disconnectedduct disconnected
removed.removed.removed.removed. fromfromfromfrom
Switch shownSwitch shownSwitch shownSwitch shown fan fan fan fan suctionsuctionsuctionsuction
at bottom.at bottom.at bottom.at bottom.
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OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Kitchen Exhaust Hoods� The ZNE team reviewed the design of the existing kitchen exhaust hoods and found
that they are poorly designed for the application.
� A major kitchen exhaust system manufacturer offered a low-cost hood retrofit
design.
Hood vs. Cooking EquipmentHood vs. Cooking EquipmentHood vs. Cooking EquipmentHood vs. Cooking Equipment
outward extensionoutward extensionoutward extensionoutward extension
56
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Gas Cooking Ovens� The ZNE team examined the performance of the existing gas ovens in the kitchen and
found that their efficiency, while standard at the time of purchase, is well below
the efficiency of new EnergyStar rated gas ovens on the market today.
57
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Envelope� The Building K envelope characteristics were analyzed to determine if improvements
to the building’s insulation, roofing materials, envelope integrity, or any other
facet of the building’s barrier to the outdoors would warrant investment.
58
OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� HVAC Unit Condenser Evaporative Coolers� Another ECM examined was the installation of evaporative coolers directly on the
condensers of the new rooftop HVAC units for the MPR.
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OPPORTUNITIES AND SOLUTIONS AT RALSTON IS
� Condensing Domestic Hot Water Heaters� Existing condensing domestic hot water heaters on the market can improve the
efficiency of water heating from the standard 80% efficiency up to 95% efficiency
or more.
� Walk-in Cooler/Freezer Door Auto-Closers and Strip Curtains� The ZNE team also investigated the installation of walk-in freezer and cooler door
auto-closers as well as strip curtains to minimize the heat entering the walk-ins
during loading/unloading operations.
San Bernardino Community College Zero Net Energy District Office and Training Center
Hussain Agah, Director,
SBCCD Facilities Planning & Construction
Sahar Abbaszadeh, Associate,
Energy Services, Cadmus
©2017, New Buildings Institute
San Bernardino Community College District
� Multi-college district:
� San Bernardino Valley College
� Crafton Hills College
� Economic Development Corporate Training
� KVCR TV 24 FM 91.1
� Serves 22 cities
� Located inland Southern California
� 25,000 students
©2017, New Buildings Institute
SBCCD Sustainability Journey
� Board Policy (3580) in 2010
� American College and University Presidents’ Climate Commitment in 2011
� Adopted sustainability plan in 2012
� Long term dedication and commitment by
� Board of Trustees
� Chancellor
� Colleges Presidents
� Community Stakeholders
©2017, New Buildings Institute
SBCCD 7 Sustainability Goals
Create a campus-wide culture of sustainability
Incorporate sustainability into development of new facilities
Invest in renewable energy and energy efficiency programs
Develop a more sustainable transportation system
Develop a more sustainable system for the purchases
Enhance curricular educational opportunities for sustainability
Establish a commitment to climate action
• Goal 1:
• Goal 2:
• Goal 3:
• Goal 4:
• Goal 5:
• Goal 6:
• Goal 7:
©2017, New Buildings Institute
ZNE from a Goal to Reality
• Funding sources to promote sustainability projects
– Capital outlay fund
– Proposition 39 initiative
– State fund block grants
• CCC/IOU partnership program championed by State Chancellor Office
– Incentive opportunities for energy efficiency measures Utilizing ZNE incentive program
• Receive up $300,000 for the District Office
©2017, New Buildings Institute
Integration & Opportunities
District Sustainabilit
y Plan
Measure P. $190
million
Measure M. $500 million
Proposition 39: Clean
Energy Job Act 2012
Energy Conservatio
nMeasures
Long-Term Alternate Energy
Management Plan
Proposition 39: ZNE
Pilot Program
Sustainability & Energy Manager
Facilities Master PlanDistrictwide Support Services Strategic
Plan
2002
2008
2012
2012
20122011
2016
2017
2017
2017
©2017, New Buildings Institute
SBCCD ZNE Project
1. District Office: 21,000 sqft.,
2. Training Center: 9,500 sqft.
3. Planned 174 kW PV carport canopy
Planned District Sustainability Projects:
– HVAC Upgrade Phase 1 �
– Exterior Lighting Replacement �
– HVAC Upgrade Phase 2
– Interior Lighting Replacement
– 174 kW Solar carport
68
Prop 39 ZNE Pilot Program Roles
Entity Role
SBCCD Client (Decision-making)
Southern California Edison (SCE) ZNE Pilot Project Management
SCE / Southern California Gas Prop 39 ZNE Pilot Incentive and Support
Cadmus Design Consulting
NORESCO Measurement and Verification
SBCCD Consultants / Contractors Design and Construction
District Office Occupants and Students Making the Project a Success!
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Prop 39 ZNE Pilot Program Process
Kick-offAudit &
Modeling
Design, Construction, and
Commissioning
ZNE Verification
This is where we are
today.
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HVAC Audit
• RTUs instrumented for VAV, operating CAV
Retrofit to VAV
• Standard efficiency RTUs (7-10 years old)
Retrofit to High-efficiency
• Air-cooled condensers in a dry climate
Retrofit for evaporative cooling
• Units operating 6AM – 6PM, regardless of occupancy
Implement advanced occupancy controls
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• T-8s and high lighting power densities
Retrofit to LED lighting
• Single-story deep floorplate
Install daylight pipes
Lighting Audit
Light pipe image courtesy of Solatube.
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• “Shades down / lights on”
Automated shading
• No daylighting / occupancy controls
Daylighting and occupancy controls
Automated shading image courtesy of MechShade WisperShade IQ.
Lighting Audit
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SBCCD Energy Conservation Measures
ECMs Details
New HVAC controlsDemand controlled ventilation. Reduced operating schedule for
classroom units.
New RTUs – District Office Replace AC-4, 5, 6, 7, 8 in District Office
Evaporative condenser add-on For all RTUs
New RTUs – Training Center Replace all RTUs in Training Center
Convert units to VAV AC-1, 2, 3 in District Office
New gas water heater New gas water heater in Training Center - 95% efficiency
Plug load management Smart power strips with occupancy sensors in office spaces
LED lighting conversion LPD reduction - 44% in District Office, and 42% in Training Center
Automated shading In perimeter spaces
Light pipes In interior spaces
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SBCCD Energy Modeling Results (Site Energy)
ScenarioSite Energy Use Intensity
(kBtu/ft2-yr)
Site EUI Reduction
(kBtu/ft2-yr)
Installed
Cost
Installed Cost Eligible
for Incentive
Existing Building 41 n/a n/a n/a
All ECMs 23 18 $1,900,000 $177,000
Planned Retrofits 34 7 $450,000 -
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SBCCD ZNE Projection (Source Energy)
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Lessons Learning
Secure commitments
Develop funding sources
Efficiency first
ZNE is achievable
Hussain Agah, Director of Facilities Planning & Construction
SBCCD, [email protected]
909-382-4094
Sahar Abbaszadeh, Associate
The Cadmus Group LLC
424-732-4123
SCE – SCGProp 39 ZNE Pilot
Akhilesh Endurthy P.E. – Lincus, Inc
©2017, New Buildings Institute
Prop 39 ZNE Pilot – Measurement and Verification
Objective
• Validate ZNE Performance
• Fault Detection & Diagnostics
• Feedback for re-commissioning
• Tied into dash boards for gamification
©2017, New Buildings Institute
Prop 39 ZNE Pilot – Measurement and Verification
Approach • At least 12 months of post operational
data
• Granularity - Both Energy Flows and Indoor Environmental Quality (IEQ) parameters
• Lighting, HVAC, Receptacles, Gas usage, Solar PV, Space temp, Humidity, CO2 levels, Occupancy, Lighting level, Mixed air temp., Window contact sensors
• Granularity - Both Energy Flows and Indoor Environmental Quality (IEQ) parameters
• Real-time and remote data accessibility
ZNE Resources
©2017, New Buildings Institute
Join us! The Second Annual ZNE Recognition Awards!
Recognition Categories
ZNE Leadership AwardHonoring the leaders, both individuals who inspire others on the path to ZNE and project teams that work effectively together
to achieve ZNE goals.
Outstanding Buildings AwardSpotlighting ZNE verified, ZNE emerging and ultra-low projects at K-12 schools and community college campuses.
Visionary School District AwardRecognizing both large and small districts that have utilized policies, programs or plans that results in larger scale
advancement of zero energy buildings.
This Afternoon! November 28th from 4:30-6:00 PMBallroom D & E at the Pasadena Convention Center
©2017, New Buildings Institute
CA
SE
ST
UD
IES
Getting to Zero Case Studies: https://gettingtozeroforum.org/case-studies/
Getting to Zero Database: http://newbuildings.org/getting-to-zero-buildings-database
PG&E Case Studies: http://energydesignresources.com/resources/publications/case-studies/case-studies-ZE-non-residential-buildings.aspx
©2017, New Buildings Institute
NBI Stakeholder Resources
©2017, New Buildings Institute
Getting to Zero Resources HUB
https://gettingtozeroforum.org/zero-energy-schools-resources/
©2017, New Buildings Institute
Other Resources
• Energy Star Portfolio Manager: https://www.energystar.gov/buildings/facility-owners-and-managers/existing-buildings/use-portfolio-manager
• NEEP High Performance Schools: http://www.neep.org/initiatives/energy-efficient-buildings/high-performance-schools
• Collaborative for High Performance Schools (CHPS) Criteria: http://www.chps.net/dev/Drupal/node/212
• Green Ribbon Schools: https://www2.ed.gov/programs/green-ribbon-schools/index.html
• NCEF School Buildings Assessment Methods: http://www.ncef.org/pubs/sanoffassess.pdf
• U.S. DOE Zero Energy School Accelerator: www.zeroenergy.org
• NREL Technical Feasibility for K-12 Schools: http://www.nrel.gov/docs/fy17osti/67233.pdf
• DOE Toolkit: K-12 Solutions for Building Energy Excellence: https://betterbuildingsinitiative.energy.gov/toolkits/k-12-solutions-building-energy-excellence
All Rights Reserved © 2017 New Buildings Institute
April 17-19, 2018Grand Wyndam | Pittsburgh
gettingtozeroforum.org
The premier global event dedicated to defining the
future of low and zero energy buildings.
• Share perspectives on the growth of ZE
• Build knowledge on policies driving projects, and design and operation best practices
• Collaborate on opportunities for ZNE to transform the built environment
©2017, New Buildings Institute
Marin Country Day SchoolPhoto Courtesy: EHDD Architects
Thank You!