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Building Performance Modeling
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Building Performance Modeling

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The goal of this discussion is to demystify building performance modeling. Computer-simulations give you a more complete picture of how various context and design factors can affect the performance of ...

The goal of this discussion is to demystify building performance modeling. Computer-simulations give you a more complete picture of how various context and design factors can affect the performance of your space. Modeling information can help you analyze the impacts of your design decisions and determine how to most effectively meet project goals.

Energy modeling is also valuable tool used for code compliance and LEED points. Not to mention the fancy graphics that models produce to show your clientele your commitment to performance-based design.

This discussion will present various opportunities that can arise from building performance simulations with analysis at the early design, whole building, and building component levels. We will examine the following types of analysis:
• Climate
• Daylighting
• Massing and orientation
• Whole building energy usage forecast
• Fenestration design
• Façade development
• Zone level energy performance
• Baseline and design case models
• System selection and optimization

For more information on this training, contact Brittany Grech at bgrech@yrgsustainability.com or (347) 843-3085.

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  • To be completed
  • To be Completed
  • The building is oriented along an east-west axis to maximize the use of daylight and natural ventilation. North-facing clearstory glazingShaded southern vision glazing and south-facing light shelves
  • The current model will show
  • Building form, mass, orientation, contextEvaluate benefit of architectural features like sun shades
  • These reuslts are produced with a combination of simulations run in Dubai climate. These are the assumption taken for the model. May or may not be shared

Building Performance Modeling Building Performance Modeling Presentation Transcript

  • Building Performance Modeling
  • Learning Objectives
    Describe capabilities of building modeling
    Recognize model outputs
    Be familiar with when simulation can be used to assist design decisions
    Understand how modeling analysis can be implemented into your design process
  • Agenda
    Energy modeling
    Benchmarks and rating systems
    Performance modeling
    Design optimization
    Integrated design process
    Lessons learned
  • 3 D modeling
  • ≤55%
    ≤73%
    7%
    Energy Modeling As We Know It
  • What’s good about this building?
  • What’s good about this building?
  • $$
    EUI
    CO2
    LEED
    40%
    CODE
  • Energy Use Distribution
  • Window-to-Wall Ratio
    ≤16%
    ≤27%
    ≤38%
    Glazing Parametric Energy Analysis
  • Goal Setting
  • Building’s Performance – Simulation Opportunities
  • Light Shelves
  • Building’s Performance – Simulation Opportunities
  • Fenestration- Parametric Modeling
  • Solar Path on June 21st
  • East
    Solar Location- Low
    Best practice- Vertical fins
    West
    Solar Location- High
    Best practice- Horizontal Overhangs
    Sun Path- East and WestFaçades
  • North
    Solar Location- Low
    Best practice- None or Vertical fins
    South
    Solar Location- Above
    Best practice- Horizontal Overhangs
    Sun Path- North and South Façades
  • Glazing Performance- Sun Ray Vector
  • Comfort Optimization- Daylight Analysis
  • All Vertical Fins
    20%
    All Horizontal Shades
    Combination
    30%
    40%
    Shading System Optimization- Solar Radiation Analysis
  • 30.1%
    SavingsOver Baseline
    31.11%
    32.4%
    34.3%
    Shading System Optimization- Energy Use Analysis
  • 1:4
    1:3
    1:2
    1:1
    Further Shading System Optimization – Vertical Fin Performance Metric
  • Depth-to-Distance Ratios
    Horizontal Fins
    Fin
    Façade (~84°)
    Max Incline Condition
    1 to 2.8 ratio
    Tower Interior
    Max Summer (75.9°)
    Max Winter (29.0°)
    Fin
    Façade (~90°)
    Typical Condition
    1 to 3.6 ratio
    Tower Interior
    Max Summer (75.9°)
    Max Winter (29.0°)
    Shading Fins – Range of Performance
  • Annual Climate Analysis
  • New York
    Denver
    °F
    Phoenix
    Hong Kong
    113+
    104
    95
    86
    77
    68
    59
    50
    41
    32
    Annual Temperature Profile
  • 320 F
    Cooling
    Heating
    Insulation
    Insulation
    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec
    Energy Demand
  • Annual Climate Analysis
  • Building’s Performance – Simulation Opportunities
  • Energy Use Distribution
  • ≤36%
    Active System Optimization
  • ft/s
    Site Wind
    32.0+
    Strong breeze
    Fresh breeze
    29.5
    26.2
    22.9
    Moderate breeze
    19.7
    16.4
    Gentle breeze
    13.1
    Light breeze
    9.8
    6.6
    Calm
    3.3
    Ventilation Analysis
  • Reduced
    Electric
    Lighting
    Reduced
    Cooling
    Loads
    Landscape
    Irrigation
    HVAC
    Cooling
    Tower
    H2O
    Daylighting
    Rainwater
    Collection
    Passive
    Winter
    Heating
    Reduced
    HVAC
    Size
    Stormwater
    Management
    Non-potable
    H2O Source
    Interactive Approach
  • Comparative Analysis- Early Design
  • What is a Building?
    Shelter for occupant comfort
    What is Performance?
    “The manner in which or the efficiency with which something reacts or fulfills its intended purpose”
    What is Simulation?
    Computer program for representation of the behavior or characteristics
    What is Building Performance Modeling?
  • Curtainwall
    Punched Window
    Designer’s Dilemma
  • Glazing- Energy Reduction and Daylight Increase
  • 100% Glazed
    50% Daylight
    Annual Temperature
    Cooling load
    0% Glazed
    0% Daylight
    Glazing- Range of Performance
  • Optimum daylight
    Fenestration- Optimized System
  • Integrative Team: The Composite Master Builder
  • Active systems: Energy use
    • HVAC
    • Lighting
    • Plug loads
    Passive systems: Structure
    • Walls
    • Roofs
    • Windows
    • Shading System
    INFLUENCE
    Passive and Active Systems
  • Optimization Pathway
    HVAC
    AND
    CONTROLS
    RENEWABLE
    ENERGY
    SYSTEM SELECTION
    ENERGY COST BUDGET
    DEMAND
    REDUCTION
    PARAMETRIC ENERGY USAGE
    ENVELOPE
    AND
    DAYLIGHT
    RADIATION AND DAYLIGHT
    ORIENTATION
    AND
    PLACEMENT
    CLIMATE AND CONTEXT
    1
    2
    3
    4
    5
    Model Outputs
    Modeling Analyses for Integrated Design
  • Summer Winds–
    Permeable Envelope
    • Operable panes
    • Intake, Exhaust vents
    Winter Winds–
    Thermal Envelope
    • Low U-value
    • Low infiltration
    Site Analysis
  • Building Climate Interaction
  • Energy Modeling - Inputs
    Location
    Setpoints
    Orientation
    Loads and Occupancy
    People- 250sqft/person
    Lighting- 1.1 w/sf
    Computers- 2w/sf
    Occupancy Hours
    Construction
    Wall to Window area
    Glazing: Glass: SHGC= 0.30; VLT= 0.45
    Opaque area: U value= 0.35
    Mechanical system
    • Heating- continuously on- electricity
    • Cooling- continuously on- electricity
    • Dual duct variable air volume
    • Water cooled chillers
    • Heat recovery or economizers
    • Fan and pump inputs
    • Renewable energy
    Domestic Hot Water
    • 1000 gallon storage
    • Size
    Specialty equipment
    Whole Building Energy Model Inputs
  • Whole Building Energy Modeling Results
  • Benchmarking Tools and Rating Systems
  • Design Models SD phase analysis DD/CD phase analysis
    IES VE
    SketchUp
    eQuest
    Rhino 3D
    Ecotect
    Revit
    Daysim/Radiance
    AutoCAD
    Tool workflow
  • Design Integrated Analysis
  • YRG sustainabilityconsulting – education – analysis
    www.yrgsustainability.com
    ArpanBakshi, Sustainability Manager
    abakshi@yrgsustainability.com
    Shillpa Singh, Senior Sustainability Manager
    ssingh@yrgsustainability.com