23 - Innovating Food, Innovating the Law - VINOD KUMAR GUPTA
INNOVATING & INTEGRATING for SUSTAINABILITYconstruction-innovation.info/images/pdfs/events/... ·...
Transcript of INNOVATING & INTEGRATING for SUSTAINABILITYconstruction-innovation.info/images/pdfs/events/... ·...
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INNOVATING & INTEGRATING for SUSTAINABILITYPresented to SB08 24 March 2008
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Technology and Tools Improving Sustainability in DesignPresented to SB08 24 March 2008
Peter BowtellPrincipal, Manager Southern Buildings
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industry revolution
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Industry revolution
complexity
embedded cost
evaluation
optimisation
explanation
senses
planning
operations
energy
COMMUNICATION
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What good is a digital Engineer?
Approaches to Interdependency: Early
Design Exploration across the architectural and engineering domains
(Dr) Paul Nicholas
“Interdependency”
A relationship through which parties can constructively explore their differences and search for solutions that go beyond their own limited vision of what is possible
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US National Institute of Standards and Technology (USA)
“estimates the cost of inadequate interoperability in the U.S. capital facilities industry to be $15.8 billion per year.”
Annual Report of the National Institute of Building Sciences (USA)
"It has been estimated that 30% of the cost of construction today is spent on gathering, entering, exchanging and re-
entering data and information used by the different sectors involved in a facilities' planning, design, construction, and
operation and maintenance.
Interoperability
Interoperability
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Sustainable buildings
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right here – right now
Assessing Green Building Performance
A post Occupancy Evaluation of 12 General Services AdministrationBuildings
26 % less Energy Use
13% Lower maintenance Costs
27% higher Occupant Satisfaction
33% less CO2 Emissions
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Linked up Thinking
SPeAR
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MaterialOptimisation
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Shell Component
Typical – 6 bays
• Component object
• Copied to model using
defined control arcs
Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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GC
Bentley STFModel
StrandAnalysisFabrication
Wireframe
Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Melbourne Rectangular Stadium
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Building Performance
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When?
Scheme Design Design Development
Contract Administration
Construction Documentation
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How?
Not a photo montageVisually accurate against city backdrop
Full 3D render to visualise scheme
Q: Does my building look good in this?
Scheme + surroundsSimplification of fritted DGU
Facade systems input using formulas
Solution features
Radiance
Solution process
Build a 3D city modelAccurately determine and specify glass properties (frit +
coatings)Simulate using physically accurate ray-tracing
Rhino
Perl
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How?
Complex building formLimited information (plans and elevations)
Short timeframe Unfamiliar solution process
Q: Can this be a low energy building?
Modelled ~ 1/20th of the buildingModel geometry very different to actual building
Flexible model
Solution features
ExcelSolution process
Simplify the buildingConstruct an energy model and test options
EnergyPlus simulation model +custom Excel spreadsheet =
reasonable answer
DesignBuilder
EnergyPlus
Perl
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How?
4 different pavilions, some overshadowingPMV, SET*, PET ? (direct sun)
3D CAD (xrefs, complex geometry)
Q: Will outdoor glass pavilions in Singapore be comfortable?
Modelled 1 representative pavilionQualitatively combined sun-plots with comfort results
Solution features
Solution process
Build a representative thermal model to test facade options
Define targetsGenerate sun plots to predict direct sun
Thermal model + sun model + SET* spreadsheet = reasonable answer ?
DesignBuilder
EnergyPlusExcel
Radiance
Rhino
AutoCAD
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How?
Plans, elevations, sectionsMech. & elec. Specifications
Free to modify fabric, shading, internal loads
Q: How do I design a low-energy villa in Dubai?
Model represents actual buildingScripts to automate multiple simulations
Scripts to automate reportingModel templates for re-use
Solution features
Solution process
Construct energy modelTest various design options
Identify and rank potential improvements
DesignBuilder
EnergyPlus
ExcelPerl
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How?
Identify prevailing wind direction & speedDetermine typical fire scenarios & rate of smoke
productionSize louver openings to provide smoke clearance and
safe escape
Q: Will these louvers provide adequate smoke ventilation?
Modelled internal spacesArtificial domain boundaries
Inputs from experimental data
Solution features
Solution process
Generate mesh from 3D cadDetermine Cp from wind tunnel
Simulate range of scenarios using CFD
Rhino
CFX
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How?
Assess proposed facade systemHow does it compare with other buildings?
Reflection model large uses mirror surfacesSimplification of shading systemsNon-standard sky modelsNon-standard glare models
Solution features
Q: How will my facade system perform in terms of daylight/glare/reflections/comfort ?
Solution process
Build range of analysis modelsDetermine targetsSimulate performanceCompare with GreenStarAssess blind use, glare risks
Rhino
Radiance
ParaView
EnergyPlus
DesignBuilder
Excel
Perl
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How?
Predict wind-driven rain ingressDetermine requirement for canopy protection
Q: Will I get wet in this ?
Scheme + surroundsSignificant de-featuring for CFDSpecial rain model (ASM)
Solution features
Solution process
Obtain combined wind and rain frequency dataUse CFD to simulate air movementAdd typical rain density (droplet size and distribution)Predict droplet trajectory and wetting patterns
Rhino CFX
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How?
Consider the local climateDetermine outdoor comfort conditionsPropose mitigation measures if required
Q: Will this urban environment be comfortable?
Scheme + 500m surroundsDe-featuring to generate block modelsScripts to combine all the dataExternal function calls to comfort model
Solution features
Solution process
Predict urban windSelect characteristic summer/winter/mid-season daysPredict sun penetrationCombine data to predict SET* comfort temperature
Rhino
Radiance
Paraview
Wind speed + Radiation
+ Humidity + Clothing + Activity = Comfort
Perl
CFX
Spreadsheets
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Software integration
DesignBuilder
EnergyPlus
SpreadsheetsRadiance
Apache
Oasys E&TA
ContamW
Phoenics
CFX
NatFacRadTherm
ICEM CFD
Star-CD Fluent
Ecotect
Window5
Therm
Harpoon
FDS
EQuest
Perl
Python Windows
Linux
CygwinVBA
glue
OS
2D CADHand-sketch 3D CADConversation
inputs
3D Visualisation
2D Images
Spreadsheet
outputs
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gbXMLIFC
Software integration
DesignBuilder
EnergyPlus
SpreadsheetsRadiance
Apache
Oasys E&TA
ContamW
Phoenics
CFX
NatFacRadTherm
ICEM CFD
Star-CD Fluent
Ecotect
Window5
Therm
Harpoon
FDS
EQuest
???
Revit SketchUp VE Ecotect ???
integrated analysis model
Quest NavisWorks ???
analysis review
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When would a single input model be most useful?
Design Development (significant benefits)General design advice
Green Star – Green Mark – LEED – Part L – ABGRModel represents actual building
Can get away with less flexibility - repeat processesGood for documenting performance
Less value ...
Scheme Design (smaller benefits)Conceptual design advice
Broadening the design spaceFocus on parametric design, scenario modelling, what-ifs ...
Model is an abstraction of actual buildingRequires simplification, symmetry ...
Needs flexibility –novel processesMore value ...
Increasin
gly u
seful
This is w
here w
e pro
vide m
ost valu
e
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What are the benefits?
Pros ConsSD Engineering
&Modelling
Good starting point for further work
Everyone on the same page
Parametric, simplification, abstraction?Loss of modelling skill (brute force over
elegance & efficiency)
Probably less choice of softwareIf external model then possibly dependent on
others for model updates etc.Reduced responsibility for inputs
Systematic errors
DD Engineering &
Modelling
Faster throughputMore time to look at options
(within restricted design space)
Buildings Integrated thinkingHolistic design
Reviewing / Checking
Integrated post-processingConsistent results formats
Systematic errors
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linked up thinking?
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Autodesk Ecotect
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Where to next?
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