Acknowledgement: Thanks to Sustainable Buildings Industry Council SBIC for providing the materials

1
AcknowledgementThanks to Sustainable Buildings
Industry Council (SBIC) for providing the
materials
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ENERGY-10 Design Tool
MOTIVATION
Mission
to provide a tool that a
designer will use routinely to guide his or her
decisions while developing the design of low-
energy building.
Vision
Eventually all buildings will be designed to be
delightful living, working, and learning
environments, enhanced by natural light,
requiring minimum resources to build and operate,
This library, built in 1980, has saved about 39
billion Btu (about 740,000) over its 20 years
operation, compared to a typical library. It cost
no more to build and gets rave reviews from the
librarians and users.
and that do not impair the environment for
following generations.
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ENERGY-10 Design Tool
NICHE
E -10's
NERGY
ENERGY-10 is suitable for smaller
buildingscommercial and institutional buildings
under 10,000 sq. ft. and also residential
76 of all non-residential buildings are under
10,000 sq. ft., representing 22 of the
total built floor area and 26 of the energy use.
lt10,000 sq
This restriction will be removed in Version 2
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ENERGY-10 Design Tool
Team
Sustainable BuildingsIndustry Council distributio
n, user supporttraining
Lawrence BerkeleyNational Lab daylighting
U.S. Department of Energy funding and oversight
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ENERGY-10 Design Tool
Architectural Award
The Progressive Architecture Research Award was
given to NREL and SBIC for the Designing
Low-Energy Buildings with ENERGY-10
package. Doug Balcomb, author of ENERGY-10
receiving the award in the Grand Ballroom at the
Waldorf Astoria, New York
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ENERGY-10 Design Tool
Highlights

• First user-friendly program based on
  hour-by-hour building simulation targeting
  early conceptual design decisions
• Automates many routine tasks, reducing time to
  produce results needed to make design decisions
  from days to hours
• Graphic input and output
• Technically solid
• Becoming widely used, both in practice and
  for teaching
• Major enhancements are in the pipeline
• Graphic input, Improved Daylighting, PV

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ENERGY-10 Design Tool
Whole Building
Focus
Evaluate a wide range of energy-efficient
strategies, working together
Passive solar heating
Daylighting
High Efficiency HVAC
Insulation
Reduced duct leakage
Better windows
Energy efficient lights and ballasts
Lighting controls
Thermal mass
Better HVAC Controls
Economizer cycle
Reduced infiltration
Shading
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ENERGY-10 Design Tool
Design Process Focus
ENERGY-10 focuses on the first phases (conceptual
design)
Activity
Phase
Tool
Develop reference case Develop low-energy
case Rank order strategies Initial strategy
selection Set performance goals
Develop Brief
ENERGY-10
Pre-design
Review goals Review strategies Set criteria,
priorities
Preliminary team meetings
Schematic Design
Develop schemes Evaluate schemes Select scheme
ENERGY-10
Design Development
Confirm that component performances are as
assumed
EnergyPlus or other HVAC simulation and tools
Construction Documents
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ENERGY-10 Design Tool
Ease of Use

• Automatic features make it easy and fast
• AutoBuild - defines a complete building based on
  five inputs and many defaults
• APPLY - creates a second building applying
  upgrades to implement any or all of 12
  energy-efficient strategies
• RANK - determines relative effectiveness of
  strategies

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ENERGY-10 Design Tool
AutoBuild Feature

• Creates two building descriptions based on five
  inputs and user-defined defaults.

• Location
• Building Use
• Floor area
• Number of stories
• HVAC system

For example
apply
Reference Case Low Energy Case R-8.9 walls (4"
steel stud) R-19.6 Walls (6" steel stud with 2"
foam) R-19 roof R-38 roof No perimeter
insulation R-10 perimeter insulation Conventional
double windows Best low-e double
windows Conventional lighting Efficient lights
with daylight dimming Conventional HVAC High
efficiency HVAC Conventional air-tightness Leakage
reduced 75 Uniform window orientation Passive
solar orientation Conventional HVAC
controls Improved HVAC controls Conventional duct
placement Ducts located inside, tightened
Gets you started quickly.
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ENERGY-10 Design Tool
Albuquerque School
20,000 m2 elementary school
ANNUAL ENERGY USE
100
Reference Case
80
75.8
Low-Energy Case
60
MWh / m²
40
30.7
27.4
19.3
20
15.1
14.9
10.7
6.6
5.7
0.2
0
Heating
Cooling
Lights
Other
Total
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ENERGY-10 Design Tool
AutoSize Feature
ENERGY-10 uses the simulation engine to size HVAC
equipment. The process is automatic and takes
only 1 or 2 seconds.
HVAC cost reductions can pay the added cost of
all the other upgrades!
HVAC RATED CAPACITIES, Albuquerque School
Reference Case
Low-Energy Case
802
29484
kBtuh
687
21162
478
349
AutoSize tells the story
heating
cooling
CFM
Provides the right information at the right time.
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ENERGY-10 Design Tool
APPLY Feature
Automatically modifies the building description
to implement any or all of 12 strategies
Beforeapply
Afterapply
Cooling
Lights
Other
Total
Heating
A few mouse clicks does itsaving timeYet the
user has total control
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ENERGY-10 Design Tool
Prioritizing Strategies
RANKING OF ENERGY-EFFICIENT STRATEGIES
New ranking options in Version 1.5 Net present
value Internal rate of return Benefit/cost
ratio Simple payback
78.39
Duct Leakage
66.38
Insulation
48.85
Daylighting
45.96
Glazing
40.82
Energy Efficient Lights
38.73
HVAC Controls
gives the relative savings if strategies were to
applied individually
35.89
Air Leakage Control
26.22
Passive Solar Heating
21.12
High Efficiency HVAC
13.67
Shading
2.85
Economizer Cycle
-20
0
20
40
60
80
Net Present Value, k
Procedures, such as sequencing simulations and
rank ordering, are automated, greatly reducing
the time required. This entire set of
calculations, including making the plot, took
about 10 minutes. Parametric analysis helps guide
decisions regarding best strategies to meet
design team goals
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ENERGY-10 Design Tool
WeatherMaker

• EVALUATE
• Many powerful graphical views of the data
• ADJUST
• create new weather files
• expands the available sites 16 fold
• CONVERT FILE FORMATS

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ENERGY-10 Design Tool
Life-Cycle Costs

• Full discounted cash flow analysis, accounting
  for all relevant factors to support cost/tradeoff
  decisions during conceptual design
• Ranks based on LCC, IRR, benefit/cost, or simple
  payback

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ENERGY-10 Design Tool
Many new graphics options
HVAC Rated Capacities
Annual Emissions Results
Reference Case
Low-Energy Case
Reference Case
Low-Energy Case
249007
1400
250000
400
12000
386
358
10741
1215
1200
10000
200000
300
1000
8000
230
150000
6851
800
729
128607
lbs
kBtuh
662
200
6000
Fan Volume, CFM
Annual CO2 Emissions, Pounds
600
157
100000
4000
382
400
100
50000
2000
200
0
0
0
0
SO2
NOx
CO2
Heating
Cooling
Fan
Low-Energy Case - Performance Summary
DMAP (3D color)
100
1.0
0.90
86.0
80
0.8
34.2
60
0.6
0.60
55.1
Annual Energy, kBtu / sq. ft.
Annual Cost, /sq. ft.
10.3
40
0.4
34.2
20
0.2
40.2
0.16
10.3
7.6
0.12
1.3
2.9
0.01
0
0.0
Loads
Consumption
Cost
Other
Summary
Solar gains in a passive solar building every
hour of the year
Lighting
Cooling
Heating
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ENERGY-10 Design Tool
Demonstration
Reference Case (energy hog)
Evaluatebuilding energy performance
Apply Strategies
Low Energy Case