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| C O N F I D E N T I A L |
Incorporating Energy Modeling into the Design Process
A Primer for Architectural Project Managers
SeventhwaveG175
Incorporating energy modeling into the design processC2494
Duane Carter and Connor JansenLive 5/27/15; then available on-demand
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Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner ofhandling, using, distributing, or dealing in any material or product._______________________________________
Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Through the use of real world examples and an enhanced understanding of the design process, this webinar will empower project managers and design team members to utilize energy modeling on their projects. From contract language to communications, we’ll address the key components you need to understand in order to successfully incorporate energy modeling into the design process.
CourseDescription
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LearningObjectives
• Discuss the critical steps to incorporating energy modeling into the design process.
• Develop contract language to address the need for scope analysis early on.
• Explain solutions to common pitfalls in the integration process.
• Gain insight into the key questions needed to make the most of energy modeling.
• Determine when and where specialized services may be required.
At the end of the this course, participants will be able to:
GBCI cannot guarantee that course sessions will be delivered to you as submitted to GBCI. However, any course found to be in violation of the standards of the program, or otherwise contrary to the mission of GBCI, shall be removed. Your course evaluations will help us uphold these standards..
Approval date:
Course ID: 0920003619
Incorporating energy modeling into the design process
Seventhwaveby
04/09/2015
Approved for:
1.5General CE hours
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Speakers
Duane CarterDirector of Sustainability and Building Performance, SCB, Chicago
Connor JansenSenior Project Manager and Building Performance Consultant, Seventhwave, Chicago
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www.aia.org/practicing/AIAB097932
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Problems With Compliance Approach
No one likes surprises
Ability to make changes is limited
Not a good value for consulting fees – benefits of modeling not leveraged in all phases of design
Makes it feel like energy efficiency is only the responsibility of engineers – or worse: modelers.
Could cost the client money in the long run
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Full Building Energy Modeling (BEM)
Starts earlier in the process near the building of design development when basic building form and envelope is fixed – almost always done by engineers
Still have somewhat limited ability to make changes
Still makes it seem like energy efficiency is responsibility of engineers or modeler
Starting too early can be expensive because tools are time intensive.
Best Practices
If they aren’t a part of the core team have the modeler(s) in all meetings and copy them on all correspondence related to envelope, mechanical and lighting
And: make sure the modelers know they should speak up – including offering unsolicited ideas.
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Best Practices
Create a modeling schedule and add to the contract and project schedule
Include scope for energy efficiency studies
Make it clear who is responsible for model inputs
Understand what the output will be or use a standard form
Design team needs to understand how to read reports and demand readable reports.
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Design Performance Modeling(DPM)
Done concurrent with the beginning of design
Tightly integrated with design team
Uses a simpler program and focuses on Tier 1 strategies (from Lechner) Building shape (surface to volume)
Envelope performance (insulation, infiltration)
Envelope configuration (windows/color/mass)
Orientation
Shading (self shading, adjacent buildings, sunshades)
Modeling Matters
“The process of creating a model is an act of discovery - we find out what pieces we need as we shape our material. This means we needn't fully specify a system to get started, we can simply craft new pieces as we go. We end up exploring the system as we create it and don't have to get a "complete" model to gain value. We can simply tinker. We can shave a little off or glue a some on to see what happens. And along the way, we bolster our intuition of how systems behave.”-Chris Granger
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What Is The Model Used For
Understanding realistic goals/targets for energy use
Understanding climate impacts
Understanding sources of loads
Understanding energy use profile
Understanding impacts of building shape and orientation
Understanding impacts of glazing/shading configuration
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Who Should Do DPM?
Obvious choice is Engineer, but: On speculative projects the engineer might not be
on board early enough.
Integrating with designers in early stages can be difficult
Standard of care can restrict certain kinds of analysis or communication
Even on a well integrated team – more time required for communication, etc.
Not all engineers have skills required for early analysis
Often not in scope and market hasn’t adjusted to fees
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The Case For The Architect
Many of the issues studied in early modeling are the primary responsibility of the architect
“Energy is a design topic, but they are few of us who have always believed this”
-Donald Watson, FAIA
The Case For The Architect
The process of modeling builds understanding
Understanding allow direct discussions with clients about trade-offs and performance.
Understanding and optimization can help architects during value engineering
Puts designer in better position to manage modeling process as it progresses
Informal internal team discussion are more efficient than having an external consultant
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Other Options
Hiring third party modeler, contract employee or dedicated employee (with expertise) that is integrated into team and starts early in the project
Having architects define questions and hiring third party or design engineer for specific tasks. “Ala carte”
Accounting For Cost
Do it in-house
If not feasible, define hours and scope of engineer or third party very tightly in early phases
Regardless, keep time low: remember this is the “napkin sketch” of energy modeling
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Simple Tools
Spreadsheets are models Usually simple to use
Very fast
Can actually be very accurate – especially for simples/small buildings
ComCheck is basically an easy to use spreadsheet
Simple Tools
Conceptual energy modeling tools Simplified and reduced inputs
Typically use plug-ins for modeling software that architects are familiar with; Sketchup, ArchiCAD or Revit
Some are geared mainly towards building configuration and envelope – less towards mechanical systems
Some examples- Open Studio
- Sefaira Architecture
- PHPP
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Best Practices
Ask questions and decide which tool is best
Keep 3D model simple
Don’t worry about perfect workflow – lots of simple models are fine.
Focus on comparative analysis – “X is slightly better than Z, X is almost twice as good as Y”
Absolute targets can also be studied, but remember this will require verification during BEM so be careful what you promise.
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Very Early Modeling
Used to respond to RFP
Used to set energy performance goals in programming
Used to determine envelope and MEP criteria for outline specification.
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Integrating
Don’t try to “surf the wave” on a project. Instead: Do some whitebox models of a typical project in the
climates where you work.
Go back and model a project that is complete.
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Modeling For a RFP
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Building Operation Modeling
This is almost always done by engineer or third party and architect may not be involved
Model is used a tool to verify building is performing as expected
If calibrated can be used to study live energy efficiency measures (LEED M&V)
Calibrated model can continue to be useful as building changes/ages
Data can be fed back into the design loop to inform future projects
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Break for Poll Results
Integrated Design
Source: Openclipart.org
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Source: AIA Architects Guide to Integrating Energy Modeling in the Design Process
Thi
nkin
g
Outside
Sparking Innovation
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Expand
the Box
with new
goals
Sparking Innovation
What Makes a Good Goal?
GOAL Reason
Poor Sustainable buildingLack of clarity with unbounded interpretation. Rating schemes help resolve this but do not force/ drive a certain metric
Better 30% savings over energy codeOften this is a comparison between simulated results. There is very little opportunity to verify actual savings
BestAn annual energy use intensity (EUI) of 45 kBtu/ft2/year
This is a measurable target; requires upfront research to establish a realistic benchmark
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Source: AIA Architects Guide to Integrating Energy Modeling in the Design Process
Where Did We Look?
EPA and CBECS analysis
UofC building benchmarking
Peer University building data
Energy model for this building
55 kBTU/gsfTarget
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Source: University of Chicago
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46 kBtu/ft2/yr
52 kBtu/ft2/yr
54 kBtu/ft2/yr
51kBtu/ft2/yr
Source: University of Chicago
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Building Performance vs Code Compliance
But a whole building simulation often requires lots of data so some times the stack of inputs and outputs can look like this…
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Improving wall insulation from R10 to R20 while including thermally exposed balconies, results in an equivalent wall R-value change from R3.4 to R3.5
Number of Firms Reporting for 2030 Commitment
Source: AIA 2030 Commitment 2013 Progress Report
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Resources
An Architects Guide For Incorporating Energy Modeling into the Design Process http://www.aia.org/practicing/AIAB097932
AIA University
https://aiau.aia.org/
AIA 2030 Commitment
http://network.aia.org/2030commitment/home
2030 Challenge
http://architecture2030.org/2030_challenges/2030-challenge/
http://2030palette.org/
Energy Star Target Finder and Portfolio Manager
http://www.energystar.gov/buildings/facility-owners-and-managers/existing-buildings/use-portfolio-manager
ASHRAE Advanced Energy Design Guides
https://www.ashrae.org/standards-research--technology/advanced-energy-design-guides
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ComEd Smart Ideas® Energy Efficiency Program
Standard and Custom Incentives
Business Instant Lighting Discounts (BILD)
New Construction
Business Energy Assessment
Commercial Building Optimization
Data Center
Commercial Real Estate
Industrial Systems Optimization
Small Business Energy Savings
Photo courtesy Related Midwest /Steve Hall ©Hedrich Blessing
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THANK YOU TO OUR SPONSOR
ComEd Smart Ideas® New Construction Service
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Contact
Duane CarterDirector of Sustainability and Building Performance, SCBscb.com, [email protected], 312-896-1118
Connor JansenSenior Project Manager, Seventhwaveseventhwave.org, [email protected], 608-210-7168
ComEd Smart Ideas® New Construction Servicewww.comed.com/[email protected]
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Q&A
This concludes The American Institute of Architects Continuing Education Systems Course
www.seventhwave.org/education/events