bim 4 passivhaus - passreg - solutions open source · the seduction of bim phpp = bim? bim 4 ph ......
TRANSCRIPT
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BIM4PH
BIM 4 PassivhausElrond Burrell, Associate
31 January 2012The Green BIM Conference
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BIM4PH
OverviewIntroductionsWhat is BIM? (Revisit!)
What is Passivhaus?
Why Focus on Energy Performance?
BIM + PH
The Seduction of BIM
PHPP = BIM?
BIM 4 PH
Visual Interrogation
Accurate Live Numerical Data
Achieving a Radical Reduction in Energy in use
Conclusion
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BIM4PH
Introductions
Elrond Burrell• Kiwi• UK Qualified Architect• Associate based in Hereford• Used Autodesk Revit since v6 / 2003• Introduced & led the implementation of BIM in Architype
Twitter: @ElrondBurrell
ARCHITYPE• Formed 27+ years ago in Sth London• 40 people in 2 offices - London & Hereford• Came out of Social Housing & Self-build movement• Design led with Social & Environmental concerns at the heart• Client engagement & Collaboration central to our work• First BREEAM excellent Primary School in England• Completed 3 of the first 4 Certified Passivhaus schools in the UK• Exploring & Implementing BIM since 2007
Twitter: @ArchitypeUK
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BIM4PH
What is BIM?
“Building Information Modeling (BIM) is the process of generating and managing information about a built asset over its whole life.”
- Cabinet Office 2012
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BIM4PH
What is BIM?
A quality assurance delivery strategy & process
» The right Information at the right point in the process
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BIM4PH
What is Passivhaus?
“… the world‘s leading standard in energy efficient design.”
A Passivhaus building is one “for which thermal comfort (ISO 7730) can be achieved solely by post-heating or post-cooling of the fresh air mass, which is required to achieve sufficient indoor air quality conditions – without the need for additional recirculation of air.”
- http://passipedia.passiv.de
Achieved through• Orientation• High Level of Insulation• High performance windows• Airtight construction• Eliminating thermal bridges• MVHR
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BIM4PH
What is Passivhaus?
A quality assurance standard for energy performance & comfort
» The right Information in the energy model (PHPP) as an integral part of the design process» The building must be built accurately to the design to be certified
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BIM4PH
Why focus on Energy Performance?
The difference between Energy and broader “Sustainability” is that without energy efficiency there is no sustainability!
That is, we can live without chilled water (BREEAM HW24), for example, but not without energy.
Energy performance is at the root of sustainability.
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BIM4PH
BIM + PH
Design & process central» Not a tick-box exercise or a piece of software
The “I” is central» Sexy 3d images & thermal graphics aren’t enough
Rigorous model analysis and testing central» Build it virtually first, then build it right on site once
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BIM4PH
The Seduction of BIM
• Software doesn’t design sustainable buildings, people do
• Just because the software can, it doesn’t mean we should
• Just because it looks good, doesn’t mean the information is actually useful
Elephant from: http://therevitcomplex.blogspot.com/
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BIM4PH
The Seduction of BIM
"Essentially, all models are wrong, but some are useful.”- George E.P. Box
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BIM4PH
PHPP = BIM?
Passive House Planning Package
“A pragmatic solution: simplified models, precise data”
• Conservative (accurate!) energy assumptions• Open• Parametric• Instant
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BIM4PH
BIM 4 PH
Simple + Useful + Productive
• Visual interrogation• Accurate Live Numerical Data
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BIM4PH
Visual Interrogation of the model(s)
• Thermal Continuity• Heat Loss Envelope• Inter-disciplinary coordination / integration
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BIM4PH
• Structure
• Insulation
• Cladding
• Check & identify issues
Thermal & Airtight Fabric Continuity
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BIM4PH
Thermal Bridges
• Identify in Building Model• Re-model in appropriate software to calculate
• Beware of seductive graphics!
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BIM4PH
Heat Loss Area
• Horizontal Surfaces
• Vertical Surfaces• Building Mass Form
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BIM4PH
Inter-disciplinary Coordination / Integration
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BIM4PH
Accurate Live Numerical Data
• Treated Floor Area (TFA)• Ventilation Volumes• Actual Room / Building Volumes• Heat Loss Areas• Window / Door Opening Areas
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BIM4PH
Treated Floor Area + Volumes
Text
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BIM4PH
Room Volumes
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BIM4PH
Heat Loss Areas
Text
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BIM4PH
Opening Areas
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BIM4PH
Oakmeadow Primary School(2,200m2)
2 x 65kW boilers installed
25kW peak heat demand= 5x oversized!
First full year of occupation:Gas bills 90% less than old building
Achieving a Radical Reduction in Energy in use
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BIM4PH
Conclusion
Overview of BIM & Passivhaus
How we use BIM for Passivhaus Design• Visual Interrogation of the Model• Accurate Live Numerical Data
Use BIM to support the PH design process
People design sustainable buildings not software!
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BIM4PH
Thank you!