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
Analytical Tools – Lighting & Visualization
Day-Lighting
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Analytical Tools – Day-Lighting
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.
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Design Optimization Techniques
Analytical Tools – Day-Lighting and Glare
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.
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Energy Modeling – An Overview
Design Optimization Techniques
System Control
Interactions
Plant Capacity
Interactions
Weather
Load
Model
Internal
Loads
System
Model
Space
Loads
Plant
Model
Hot / Ch.W.
Demands
Economic
Model
Energy
Input
Costs:
Annual
& LCC
OVERAL ENERGY MODELING STRATEGY
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Analytical Tools– Case Study with Revit/IES
Design Optimization Techniques
NO SKYLIGHT
ATRIUM
SKYLIGHT
CURTAIN WALL
PUNCHED
OPENINGS
•
•
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
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1
wk
Design Optimization Techniques
•
•
The Curtain Wall and
windows are modeled
using the basic Revit
tools.
Analytical Tools– Case Study with Revit/IES
CurtainWall Side
The skylights and
atrium roof are
modeled as a “sloped
glazing” roof type.
Punch Side
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Design Optimization Techniques
•
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
Analytical Tools– Case Study with Revit/IES
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Design Optimization Techniques
Analytical Tools– Case Study with Revit/IES
Orientation of CW
ORIENTATION VARIATIONS
•
•
By changing the
orientation of the
model in Revit and rerunning the energy
analysis, it was easy to
compare the effect of
altering Curtain Wall
exposure.
This Technique allow
one to optimize the
orientation.
Cooling Loads
Heating Loads
North
457,334
310,774
South
480,024
104.96%
310,774
100.00%
East
580,565
126.95%
310,774
100.00%
West
583,873
127.67%
310,774
100.00%
NNE - 10 deg
470,868
102.96%
310,774
100.00%
NE - 45 deg
550,594
120.39%
310,774
100.00%
NW - 45 dge
519,812
113.66%
310,774
100.00%
NNW - 10 deg
455,443
99.59%
310,774
100.00%
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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 Techniques
SPRING
& FALL
9 : 00 AM
No Sunshades
SUMMER
WINTER
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Design Optimization Techniques
Project Case Study
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Design Optimization Techniques
Project Case Study
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Project Case Study
Design Optimization Techniques
ASHRAE 55 comfort chart (pg 7)
Green – ASHRAE comfort boundary
Red – conventional HVAC design boundary
No Control
Tight
Environmental
Control
Clean
Rooms
Workplaces
Transitory
Spaces
(hallways)
Atria
Outdoor
Shelters
Outdoors
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Design Optimization Techniques
Summer
Evening Sun
Summer
Morning Sun
Northwesterly
Winter Winds
Winter Wind Rose
Southwesterly
Summer Wind
Winter
Evening Sun
Winter
Morning Sun
Noontime Sun
Summer Wind Rose
Washington D.C. monthly average precipitation
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Design Optimization Techniques
T
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Project Case Study
Temperature °F
Design Optimization Techniques
100
50
95
45
90
40
85
35
80
30
75
25
70
20
65
15
60
10
55
5
50
0
Time of Day (July 25)
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Design Optimization Techniques
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