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Design Optimization Techniques Design Optimization Techniques
• Structural – Finite Element Analysis
• Lighting – Natural / Glare Analysis
• Mechanical – Energy Analysis
• Tools • US DOE comparison of tools:• http://www.eere.energy.gov/
buildings/tools_directory
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Design Optimization Techniques
Visualization Day-Lighting
Analytical Tools – Lighting & Visualization
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Design Optimization Techniques
Notes • The NRB facility (highlighted in red) will be generally unobstructed by adjacent site
buildings in regard to solar exposure. The link partially obscures the west wing in the morning and the east wing in the afternoon.
Analytical Tools – Day-Lighting
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Design Optimization Techniques
Notes • While a large, un-shaded area of glazing provides ample illumination of the interior, the brightest
(red) interior surfaces are in stark contrast to the darkest areas. The result is glare. Occupants at the perimeter will tend to close the shades, thereby reducing available light throughout.
Analytical Tools – Day-Lighting and Glare
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Design Optimization Techniques
LoadModel
SystemModel
PlantModel
EconomicModel
SpaceLoads
Weather
InternalLoads
Hot / Ch.W.Demands
EnergyInput
Costs:Annual& LCC
System ControlInteractions
Plant CapacityInteractions
OVERAL ENERGY MODELING STRATEGY
Energy Modeling – An Overview
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Design Optimization Techniques Analytical Tools– Case Study with Revit/IES
• The Case Study Model is intended to demonstrate a variety of exposure and configuration variations in a single example.
• Simplicity is preferred, in the interest of facilitating experimentation
ATRIUMNO SKYLIGHT SKYLIGHT
CURTAIN WALL
PUNCHED OPENINGS
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Design Optimization Techniques Analytical Tools– Case Study with Revit/IES
• The Curtain Wall and windows are modeled using the basic Revit tools.
• The skylights and atrium roof are modeled as a “sloped glazing” roof type.
CurtainWall Side
Punch Side
wk 1
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Design Optimization Techniques Analytical Tools– Case Study with Revit/IES
• The Heating/Cooling Load Calculation took about 15 seconds. It includes this Room Summary as well as detail for each of the rooms.
• This calculation and report took approximately 20 seconds to compute
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Design Optimization Techniques Analytical Tools– Case Study with Revit/IES
ORIENTATION VARIATIONS
• By changing the orientation of the model in Revit and re- running the energy analysis, it was easy to compare the effect of altering Curtain Wall exposure.
• This Technique allow one to optimize the orientation.
100.00%310,77499.59%455,443NNW - 10 deg
100.00%310,774113.66%519,812NW - 45 dge
100.00%310,774120.39%550,594NE - 45 deg
100.00%310,774102.96%470,868NNE - 10 deg
100.00%310,774127.67%583,873West
100.00%310,774126.95%580,565East
100.00%310,774104.96%480,024South
310,774457,334North
Heating LoadsCooling LoadsOrientation of CW
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization TechniquesSPRING& FALL
SUMMER WINTER
9 : 00 AMNo Sunshades
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques Project Case Study
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Design Optimization Techniques
Tight Environmental
Control
No Control
WorkplacesClean Rooms
OutdoorsOutdoor Shelters
AtriaTransitory
Spaces (hallways)
ASHRAE 55 comfort chart (pg 7)Green – ASHRAE comfort boundaryRed – conventional HVAC design boundary
Project Case Study
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Design Optimization Techniques
Summer Evening Sun Summer
Morning Sun
Winter Morning Sun
Winter Evening Sun
Noontime Sun
SouthwesterlySummer Wind
NorthwesterlyWinter Winds
Summer Evening Sun Summer
Morning Sun
Winter Morning Sun
Winter Evening Sun
Noontime Sun
SouthwesterlySummer Wind
NorthwesterlyWinter Winds
Winter Wind Rose
Summer Wind Rose
Washington D.C. monthly average precipitation
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Design Optimization Techniques
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Design Optimization Techniques
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Design Optimization Techniques
