ANGAN 2019, New Delhi hi, 9 Sept ptem ember er 2019 THIS - PowerPoint PPT Presentation

ANGAN 2019, New Delhi hi, 9 Sept ptem ember er 2019

THIS PRESENTATION WAS SHARED BY Ms. Swati Puchalapalli Founder, Terra Viridis, Hyderabad FOR THE SESSION: “ Analytical Tools to Estimate Building Performance ” DURING ANGAN 2019 ANGAN 2019, New Delhi hi, 9 Sept ptem ember er 2019

THE ROLE OF SIMULATION TOOLS IN HIGH PERFORMANCE DESIGN – A PRACTITIONER’S PERSPECTIVE 10 th September 2019 Thematic Track 11 – Analytical Tools to Estimate Building Performance BEE ANGAN Conference Swati Puchalapalli Director, TerraViridis Director, VeraTatva

High Performance Sustainable Design in India – A 1000+ Year History

Vernacular Traditions evolved around Climate

Focused on achieving Comfort with minimal active intervention

Design Principles – Natural Ventilation NATURAL VENTILATION

Design Principles – Daylighting in the Buildings

Manual Tools & Calculations • Climate analysis charts • Sunpath Diagrams • Shading Protractors • Daylight and Radiation overlays • SHGC calculator (for glazing) • Daylight Factor Calculations • Ventilation and stack effect calculators

Computer Simulation Programs • Irradiation Analysis – DIVA, Ecotect, Grasshopper • Windflow Analysis – Openfoam, Winflow , CFD, Fluent….. • Microclimate Analysis – Envimet , UTCI…. • Shading analysis – external shading analysis, solar radiation penetration studies – Ecotect , Sketchup, Vasari… Master planning Studies CFD Studies • Dynamic Thermal Analysis - natural ventilation, comfort conditions, cooling load calculations, eQuest, Design Builder, Espr , TAS, IES…. • Daylight Analysis - daylighting analysis, glare analysis, complex shading and complex daylight enhancing design analysis – Radiance, Daysim, Diva…. Dynamic Thermal Modelling for Passive Design and Energy Modelling Glare Assessments Shading Studies Daylight Studies

Technology • Insulation • Efficient glazing • Phases change materials • Efficient HVAC systems • LED lighting • Solar PV…..

So much information… So many tools… 1. Learnings from Vernacular Design 2. Passive Design Principles 3. Climate Analysis 4. Design Principles 5. Manual Calculation Tools 6. Simulations and Calculations 7. Codes – ECBC, NBC, ASHRAE, CIBSE 8. Rating System Guidelines – GRIHA, LEED, IGBC, WELL…. 9. Thermal Comfort Metrics – IMAC, ASHRAE, CIBSE, NBC

ARE THEY REALLY USEFUL? WHAT CAN THEY HELP ACHIEVE?

Days of ‘The Master Builder’ are gone!!

IT’S A TEAM EFFORT. Structural Engineering MEP and Fire Interiors Engineering Architecture and Landscape Masterplanning Lighting Design Sustainability

Sustainability overlaps with every other Team Member Landscape Structural, MEP, Fire and Lighting Engineering Sustainability Interiors Architecture and Masterplanning

Simulation Tools Bridge the Gap – Numbers can Talk! Construction Masterplan Building level Schematic and Detailed Construction and Concept Design Design Commissioning • Form Internal space planning • Tender documents and Shop • Orientation • Natural /Mixed Mode Ventilation Design • Drawings Checking Masterplanning Layouts • Façade design • On-site Coordination • Landscaping • Shading • Problem Solving External Comfort studies • • Reducing Fabric Loads Pre commissioning of • Maximizing Usable Daylight • passive systems Glare Minimization • Building Materials • Internal Surface Properties • • Artificial lighting integration into daylight Low energy cooling system integration • HVAC and Electrical Sizing • Controls, Metering and Monitoring Protocols • Landscape design to enhance microclimate • Post Occupancy WIND FLOW & CLIMATE SOLAR OUTDOOR DATA STUDIES Post occupancy COMFORT evaluation THERMAL, ENERGY & DAYLIGHTING and SHADING VENTILATION STUDIES Setting real time • benchmarks TOOLS TOOLS USED TOOLS USED TOOLS TOOLS USED USED USED Rhinoceros /Ecotect Rhinoceros Rhinoceros Rhinoceros + + + + EDSL Autodesk flow Grasshopper Grasshopper Grasshopper TAS/eQuest/Design design, Ladybug, +honeybee / +ladybug +ladybug, DIVA builder, OpenFoam CFD, OpenFoam Ecotect, DAYSIM EnviMet

Simulation Tools help in.. The design development from start to finish 1. Combining design with technology most effectively 2. Identifying problem areas and helping to solve Vernacular Design them 3. Optimising the design Building Physics Principles Engineering Technology Project: Amaravati High Court Architects: Foster + Partners, AHC

Simulation Tools help in.. The design of High Performance Buildings with ambitious energy consumption targets 30kWh/sqm/annum – Institutional Building Vernacular Design 75kWh/sqm/Annum – Office Buildings Building Physics Principles Engineering And Achieve Net Zero Energy Targets Technology Project: Amaravati High Court Architects: Foster + Partners, AHC

High Performance Without Considering Comfort….

SENIOR CLASSROOM – THERMAL STUDY External Wall 12 PM Clearstory Internal External Temperature 34.7° 36.7° Humidity 33% 27% Daylight 220 lx 8084 lx Project: Aga Khan Academy Retrofit

JUNIOR CLASSROOM – THERMAL STUDY External Wall 10 AM Internal External Temperature 34.3° 34.4° Humidity 40% 31% Daylight 315 lx 2600 lx 2.30 PM Internal External Temperature 34.7° 36° Humidity 32% 23% Daylight 500 lx 4850 lx Project: Aga Khan Academy Retrofit

High Performance Without Considering Comfort ….is a wasted Opportunity

SIMULATION TOOLS THAT HELP WITH COMFORT ASSESSMENT

Early Design Stage – Climate Analysis Construction Masterplan Building level Schematic and Detailed Construction and Concept Design Design Commissioning • Form Internal space planning • Tender documents and Shop • Orientation • Natural /Mixed Mode Ventilation Design • Drawings Checking Masterplanning Layouts • Façade design • On-site Coordination • Landscaping • Shading • Problem Solving External Comfort studies • • Reducing Fabric Loads Pre commissioning of • Maximizing Usable Daylight • passive systems Glare Minimization • Building Materials • Internal Surface Properties • • Artificial lighting integration into daylight Low energy cooling system integration • HVAC and Electrical Sizing • Controls, Metering and Monitoring Protocols • Landscape design to enhance microclimate • Post Occupancy WIND FLOW & CLIMATE SOLAR OUTDOOR DATA STUDIES Post occupancy COMFORT evaluation THERMAL, ENERGY & DAYLIGHTING and SHADING VENTILATION STUDIES Setting real time • benchmarks TOOLS TOOLS USED TOOLS USED TOOLS TOOLS USED USED USED Rhinoceros /Ecotect Rhinoceros Rhinoceros Rhinoceros + + + + EDSL Autodesk flow Grasshopper Grasshopper Grasshopper TAS/eQuest/Design design, Ladybug, +honeybee / +ladybug +ladybug, DIVA builder, OpenFoam CFD, OpenFoam Ecotect, DAYSIM EnviMet

Climate Analysis – Ambient conditions Dry Blub Temp. (degC) Dry Blub Temp. (degC) Humidity(%) IMAC comfort lower limit IMAC Comfort Upper limit 25 per. Mov. Avg. (Dry Bulb degC) 25 per. Mov. Avg. (Relative humidity) Humidity(%) 35 100 Most comfortable – low ambient / Most comfortable – low ambient Most discomfort due to High temperature with temperature with Ambient Temperature 90 Humidity (less than 60%) 30 Humidity (less than 60%) 80 IMAC Comfort Chart 25 70 60 20 50 15 40 30 10 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 20 5 10 0 0 Monthly avg. dry bulb temperature IMAC Comfort limit • 86% of the year is comfortable Max IMAC threshold temp. – 29.1c • Discomfort hours as per IMAC is for • one month only when ambient temperatures go above 32 deg C Instances when temp > 30°C and Relative Dry bulb temperature annually on a humidity >50% on a sunpath sun path diagram