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Modelling Overview and Strategy

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by

Phil P

on 11 September 2013

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Transcript of Modelling Overview and Strategy

Planning/Feasibility
Concept
Documentation
Schematic Design
Construction
Operation
Feedback
Detailed Design
Potential Modelling Applications
Component based modelling
System integration and performance
Virtual commissioning
HVAC Simulation
Core Modelling Services
Climate/Site Analysis
Site Wind Analysis
Solar Radiation
and Daylight
Local or simplified models used to compare options, inform design decisions, increase confidence and reduce risk
Concept Modelling
Comparative modelling to inform design decisions, e.g.:
local models of key spaces to compare performance of proposed system options
simplified whole building models
Conceptual Energy Modelling
Typically local models used to evaluate the effectiveness of design decisions, e.g:
whether passive cooling using thermal mass can achieve comfort targets
developing the performance of natural ventilation strategies
Passive Design Analysis
Targeted modelling to support development of facade concept, e.g:
comparison of facade load contribution to 'notional' facade spec
shading/radiation/daylight modelling to inform design of shading systems etc
Facade Performance
Dynamic simulation of daylight performance
Operation of shading and controls
Visual comfort and glare analysis
Energy savings from daylight linked lighting
Rights-to-light analysis
Climate Based Daylight

Thermal bridging and condensation risk
Non-standard details and refurb projects
Facade systems and modular buildings
Building regs requirements
Component Thermal Analysis
Room comfort maps
Pollution control
Ventilation systems performance
Natural ventilation strategies
Airflow and IEQ
Pedestrian wind comfort
Pollution dispersal
Outdoor amenity space
Natural ventilation strategies
Wind and Microclimate
Low factor experimental design
Multi-objective optimisation
Optimisation
Model predictive control
Continuous commissioning
Optimal Control
Predictive Modelling
Whole building modelling
UK bias
Compliance frameworks
Energy and Emissions
Design validation
Zonal level checks
Compliance frameworks
Thermal Comfort
Design validation
Bulk airflow modelling
Compliance frameworks
Ventilation
Tools map
Concept: vasari, ecotect, IES, GBS
Daylight: Rhino & DIVA
Optimisation: energy+, JEPlus, DesignBuilder, IES, IDA ICE
Wind and Microclimate: CFD tools, ENVI-Met, Custom processes, RadTherm
Advanced HVAC: energy+/DesignBuilder, IES, TAS, TRNSYS, BCVTB, IDA ICEetc
Airflow and IEQ: CFD tools e.g. Ansys, Star-CD, FloVent/FloEFD, AutoDesk CFD
FEA Thermal: Physibel etc, RadTherm, AutoDesk CFD
When to Model
performance and cost largely dictated by early design decisions, so use modelling to inform these
use of models and bim platforms means that design space gets populated early with 'first pass' data.
Design then becomes a process of evolving this data - modelling can contribute to this process
Why Model
increasing performance demands - need to eke out every last drop
Regulatory demands e.g. UK trajectory for zero carbon on regulated energy by 2019
compliance assessments
increasing client awareness of energy, carbon, cost
maturity of baseline designs: efficient fabric and systems, no more easy wins.
challenge to correlate delivered vs. predicted performance
validation/control of risk for both client and Jacobs
Who Should Model?
balance between value to designer and need for specialist skills
overlap between architecture and services roles: can act as integrator and driver for design
modeller can provide service (facilitate analysis) but designers must own the data
lack of transparancy/direct feed into model hampers this
The Vision: Integrated Modelling
BIM vs BPM model the best we can do for now
Explore adding flags to BIM data to highlight dependencies
concept level analysis support is an easy win: lightweight by definition, tools available
BP team to provide support to architecture and services teams
Specialists bring speed and robustness to analysis whilst tools landscape remains complex
Concept tools: Vasari and GBS (plus Climate Consultant, DView, FreqWorks etc) with
Rhino/Diva
for daylighting
Concept methods using DTMs: IES vs TAS vs DesignBuilder
CFD adds glamour but also has a role to play in virtual prototyping, i.e. delivering projects which work
AutoDesk CFD
a strong contender due to tight Revit integration and right balance of capability
Cost effectiveness of any CFD tool at this level would need to be demonstrated
In the short term DesignBuilder or IES CFD can provide a low level capability
Predictive modelling is THE hot topic, but not to be undertaken lightly
Phase 1: use existing tools and methodologies, simply develop custom templates and profiles in conjunction with client. Document clearly and caveat heavily!
Phase 2: need to add POE feedback to calibrate models. May need to integrate component level HVAC.
Phase 3: start to introduce uncertainty modelling. May need to move to parametrics (e.g. JEPlus or similar) for this, depending on number of variables considered.
use of predictive modelling to highlight failure modes and trigger procedures to circumvent
e.g. failure to consider daylight environment and hence performance of linked luminaires
failure to fully integrate/commission complimentary hvac systems (solar thermal vs chp for example)
effect of poor control of nat vent/night vent and need to implement client level management strategies
Ashrae 90.1 - LEED, Estidama, BREEAM Int
Many others: Minergie, HK BEAM, Green Star, etc
International Compliance
Sun Paths/Shadowing
Passive Design Principles
Actual Building Performance
Probabilistic Modelling
Tools
HVAC Simulation
Core Modelling Services
Climate Based Daylight
Component Thermal Analysis
Airflow and IEQ
Wind and Microclimate
Optimisation
Predictive Modelling
Energy and Emissions
Thermal Comfort
Ventilation
International Compliance
Climate/Site Analysis
Concept Modelling
Vasari
Ecotect
IES VE
Vasari/GBS
Ecotect
IES VE
TAS
DesignBuilder/e+
General purpose CFD tools
Autodesk CFD
Harpoon/OpenFoam
RadTherm
Envi-Met
Radiance/Daysim
Rhino/Diva
IES-VE
DesignBuilder/e+
TAS
Trnsys
IDA ICE
IES-VE
DesignBuilder/e+
Trnsys/GenOpt
IDA ICE
IES-VE
DesignBuilder/e+
TAS
IDA ICE
IES-VE CFD
DesignBuilder CFD
FloVent/FloEFD
AutoDesk CFD
Physibel
RadTherm
AutoDesk CFD
IES-VE
DesignBuilder/e+
IDA ICE
eQuest
IES-VE
TAS
DesignBuilder/SBEM
IES-VE
TAS
DesignBuilder/e+
IDA ICE
IES-VE
TAS
DesignBuilder/e+
IDA ICE
Cost of Change
Data Driven Design
Building Performance Model
Building Performance Model
ownership of data
diagram: design stream (BIM) vs analysis stream (BPM)
potential for data to become disconnected
desire to push data back into BIM stream and automate analysis, but software not there yet!
So, where to?
BIM vs BPM model the best we can do for now
Need for specialist support whilst tools landscape remains complex: even simple tools may require context/interpretation whilst advanced tools may need expert handling for both robustness and speed
Hence the Jacobs
Building Performance Team
Who?!
A community of experts residing in various teams
Offering guidance in the use and application of modelling tools or carrying out studies on behalf of designers
Development of analysis processes and calculation tools with a view to increasing both robustness and speed of deployment
Building Capability: Phase 1
Focus on concept tools and methods - lightweight and easy to deploy and add value to both architectural and MEP design decisions
Extend use of DTM tools beyond simply compliance checking
Validate and develop guidance on the use of concept toolsets such as Vasari/GBS
Advanced radiation and daylight modelling capability is an easy win via Vasari and Diva
Review and augment current QA processes for formal modelling
Ensure team trained on Revit with view to focussing development on this platform
Building Capability: Phase 2
Develop deeper DTM capabilities such as component level HVAC simulation
Start to move towards performance in use and operational sensitivity studies rather than simply compliance
Consider implementing advanced CFD capability: adds glamour, but also has a role to play in virtual prototyping, i.e. delivering projects which work
Continue to review and develop tools landscape and push towards BIM integration
Building Capability: Phase 3
Analysis toolkits built around BIM platform to accelerate turnaround times and facilitate single data set
Development of parametric modelling approaches to support optimisation techniques and uncertainty modelling
End goal is predictive modelling based on user profiling and risk
Look at OpenStudio as entry point to e+ with view to phase 3 parametrics and Revit integration
Focus on concept tools and methods - lightweight and easy to deploy and add value to both architectural and MEP design decisions
Extend use of DTM tools beyond simply compliance checking
yr1 projects and ongoing, dependent on project opportunity
Validate and develop guidance on the use of concept toolsets such as Vasari/GBS
6mths
Advanced radiation and daylight modelling capability is an easy win via Vasari and Diva
1-3mths dependent on project opportunity
Review and augment current QA processes for formal modelling
by Feb13:

Data collection/CRAV processes/model filing and results issue/
Ensure team trained on Revit with view to focussing development on this platform
3mths
6 - 24 mths
2yrs and ongoing
Design Process vs Simulation Modelling
'Clients'
Architectural teams: concept modelling, form finding, facade options, radiation and daylight tools etc
M&E teams: concept design decisions, validation and compliance testing, optimisation, performance predictions
International bldgs teams: all of above plus compliance modelling (Ashrae 90.1 etc)
Infrastucture: simple bldg models/load profiling extrapolated to masterplan scale to assist in infrastructure sizing/design.
Process - need to add slide: coupled building/process modelling (e.g. waste heat utilisation)? Or adapt modelling approaches for process purposes (e.g. using modelica/trnsys etc. Would need some research, and surely specialist tools would already exist??)
Energy Retrofits
In Detail: Network
Phil Pointer
Hemant Multra
Andy Burbridge
Maciej Wieczorek
Amit Sharma
In Detail: QA
Model Filing Procedures
Standard directory structure in project filing
Naming conventions and iterative studies
File tracking sheets
Data Collection
Update information template
Source references
Always issue as appendix and highlight key assumptions
CRAV Processes
Standard review pro-forma
Results issue sheets reference file tracking and review sheets
Tools Phase 1
Geometry
Architectural Specs
M&E Specs
Revit
Vasari
Site Analysis
Climate
Wind
Solar
Daylighting
Climate based daylighting via
Diva/Rhino
Or better integration but static analysis via 3DSMax
TAS
Thermal Modelling
Concept Studies
Compliance Models
Manual Data Transfer
3D Data Transfer
Tools Phase 2
Geometry
Architectural Specs
M&E Specs
Occupancy and FM
Revit
Vasari/GBS
Site Analysis
Climate
Wind
Solar
Daylighting
Advanced daylighting capability via Diva or 3DSMax
TAS
Thermal Modelling
Concept Studies
Compliance Models
HVAC Modelling
Conceptual Energy
Passive Design
System Options
LZCs
Manual Data Transfer
3D Data Transfer
Revit Analysis Model
DTM Package
Thermal Modelling
Concept Studies
Compliance Models
HVAC Modelling
Secondary model for analysis zoning, built within Revit and parametrically linked to Master
Data Transfer via gbXML or IFC
AutoDesk CFD
Comfort studies
Natural and HVAC airflow validation
Close control environments
Pressure coefficients for NV bulk airflows
Component thermal modelling
Wind modelling
GBS
Conceptual Energy
Passive Design
System Options
LZCs
Current capability largely clustered around late concept/early scheme through to end DD, with ongoing compliance checks to completion.
Most modelling techniques centered on this timeframe, but highest value comes from modelling which supports/informs early stage design decisions.
Tools Phase 3?
Daylighting
Climate based daylighting integrated into Revit platform via either 3DSMax or Diva type interface to Radiance
Modelling Solver
Thermal Modelling
Concept Studies
Compliance Models
HVAC Modelling
Automated and Bi-directional Data Transfer facilitates iteration by
Designer
Geometry
Architectural Specs
M&E Specs
Occupancy and FM
Integrated Analysis Processes
Revit
Vasari/GBS
Site Analysis
Climate
Wind
Solar
Conceptual Energy
Passive Design
System Options
LZCs
Revit Analysis Model
Evolves to become overlay layer of analysis data (i.e. boundary conditions)
Model zoning derived from BIM data
AutoDesk CFD
Comfort studies
Natural and HVAC airflow validation
Close control environments
Pressure coefficients for NV bulk airflows
Component thermal modelling
Wind modelling
Current Capability
Whole building modelling
UK bias
Compliance frameworks
Energy and Emissions
Zero carbon community centre
Mean, lean, green approach supported by energy modelling
BREEAM Excellent and winner of green apple award
MyPlace
Design validation
Zonal level checks
Compliance frameworks
Thermal Comfort
Research project carried out in conjunction with Exeter University to assess implications of climate change on building performance
Jacobs carried out thermal modelling to investigate effects on thermal comfort and cooling demand, and to test possible mitigation measures
Prometheus
Thermal modelling used to validate resilience of natural ventilation strategy against predicted future weather data
Thames Valley Police Sulhampstead
Design validation
Bulk airflow modelling
Compliance frameworks
Ventilation
Dover Harbour Board
Bulk airflow modelling used to investigate concentration of vehicle exhaust fumes
By validating performance of natural ventilation client was able to avoid significant capital and ongoing costs of mechanical ventilation solution
Ongoing compliance validation
WYP Wakefield and Leeds
Complex buildings with multiple space types
Thermal modelling used to optimise facade design through thermal and daylighting trade-offs
Also LZC options studies to achieve BREEAM Excellent performance
WYP
Technical Lead and co-ordination
Network of experts - UK Buildings PU
Building Performance Analyst
Full transcript