adrian j. soble bprc summer seminars june 27th 2019...recent lessons learned 4. intro to grasshopper...
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Adrian J. SobleBPRC Summer Seminars June 27th 2019
Research UpdateCREATE Heritage
Engineering Program
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1. Hello!
2. Looking Back
3. Recent Lessons Learned
4. Intro to Grasshopper
5. Work Looking Forward
Overview
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What Have I been Up To?
Carleton Heritage Conservation SymposiumApril 27th 2019
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What Have I been Up To? IBPSA Rome 2019 Student Modeling Competition
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What Have I been Up To?
Mexico DSA 2019
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What Have I been Up To?
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Looking Back : Research Objectives
Energy
Indo
or E
nviro
nmen
t
Heritage & Architecture
Develop tools and methodology to better incorporate existing/historical
building performance aspects into the decision making process for retrofits by
means of generative design
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Looking Back : Indoor Environmental Quality People spend up to 95% of their time indoors
Designers should keep the best interest of the public in mind
International WELL Building Institute, “The Well Building Standard,” vol. V1, no. May, 2016.8
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Looking Back : Building Energy
Buildings are responsible for 30 - 45% of the global energy usage via systems that support:
● Heating ● Ventilation● Lighting ● Appliances● Electronics ● Hot Water
W. O'Brien, A. Athienitis. Modeling, design, and optimization of net-zero energy buildings. Erns & Sohn, 2015.9
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Looking Back : Heritage and Existing BuildingsHeritage buildings comprise of 10 - 15% of the building stock
The rate of replacement for existing buildings is only 1 – 3% annually
A. Martínez-Molina, I. Tort-Ausina, S. Cho, and J. L. Vivancos, “Energy efficiency and thermal comfort in historic buildings: A review,” Renew. Sustain. Energy Rev., vol. 61, pp. 70–85, 2016.10
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IEQ Category Metric Name
· Average light intensity· Work surface lighting intensity· View access distance· Spatial daylight autonomy· Annual sunlight exposure· Useful Daylight Illuminance
Acoustic · Exterior Noise Intrusion· Perceived Noise Criteria· Reverberation Time· Sound Transmission Class· Speech Transmission Index
· Formaldehyde· TVOC· CO· PM₂.₅· PM₁₀· Ozone· Radon· CO2· RH· Odor
· Predicted Mean Vote· Predicted Percent Satisfied
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● More than parametric analysis ● Uses evolutionary optimization
algorithms● Compromise Oriented
○ Not intended to find single “Most Optimal” solution
● Design options must be formatted for stakeholder evaluation
Krish, S. (2011). A practical generative design method. CAD Computer Aided Design, 43(1), 88–100. https://doi.org/10.1016/j.cad.2010.09.009
Looking Back : What is Generative Design?
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Looking Back : GD Methodology
Model
Simulation
Exploration UsingMulti-objective
Genetic Algorithm
Analysis
Performance Metrics
Model Parameters
Changes to Model Parameters
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Be the chef, not the farmer*
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https://www.youtube.com/watch?v=RB9ly1sRxtc&t=5403s15
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Looking Back : Tool Review
Model
Simulation
Exploration UsingMulti-objective
Genetic Algorithm
Statistical Analysis
● Platypus● PyGMO● DEAP/deap● Inspyred● Optimo
Performance Metrics
Changes to Model Parameters
Model Parameters
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First Idea
Statistical Analysis
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Second Idea
StakeholderAnalysis
Geometry
Models
Project Refinery
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Current Idea
Stakeholder Review
Models
Optimization(Using RBFOpt and
evolutionary CMA-ES)Geometry
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Why did I move away from Dynamo?
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Visual Programming Comparison
Interfaces with
First Released 2013 2007
Open Source Back End Yes Yes
Python Interface Yes Yes, More Stable
Imports Geometry Yes Yes
Imports BIM Features Yes No
Apps / Plugins 1176 728, Tighter Control
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LINK
https://www.ladybug.tools/22
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https://www.youtube.com/watch?v=RB9ly1sRxtc&t=5403s23
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We should all be using / teaching grasshopper?
● Comfortable and interactive front end to already verified simulation engines
● Open source and developed in Python● Robust data visualization capabilities ● Very flexible ● Extensive documentation ● Industry is using it!
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Let’s Dive into Grasshopper!
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Looking Forward
● More optimization runs● Develop balanced cost function for:
○ Light Comfort ○ Energy Efficiency ○ Thermal Comfort ○ Air Quality
● Figure out how to speed up run times
● Explore the potential for Acoustic Comfort modeling
● Develop other ways to navigate / communicate large volumes of options to stakeholders
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SLIDE ANNEX
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IEQ Category Metric Name Ideal Range
· Average light intensity· Work surface lighting intensity· View access distance· Spatial daylight autonomy· Annual sunlight exposure· Useful Daylight Illuminance
· > 215 lux at 0.76 m· 300 lux—500 lux· 7.5 m - 12.5 m· > sDA300,50%· < ASE1000,250
Acoustic · Exterior Noise Intrusion· Perceived Noise Criteria· Reverberation Time· Sound Transmission Class· Speech Transmission Index
· > 50 dBA· 20 - 40· RT60, 0.5 s—0.6 s· 45 STC—60 STC· 0.2— 0.5
· Formaldehyde· TVOC· CO· PM₂.₅· PM₁₀· Ozone· Radon· CO2· RH· Odor
· < 27 ppb· < 500 μg/m³ · < 9 ppm· < 15 μg/m³· < 50 μg/m³· < 51 ppb· < 4 pCi/L· < 800 ppm· 30% - 90%· 0 - 4 OLF
· PMV· PPD
· ASHRAE Standard 55
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