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Feb 06, 2016
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ENERGY-10 Design Tool
ENERGY-10
to provide a tool that a designer will use routinely to guide his or her decisions while developing the design of low- energy building.
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,
–and that do not impair the environment for following generations.
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.
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 is suitable for smaller buildings–commercial and institutional buildings under 10,000 sq. ft. – and also residential
<10,000 sq
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.
This restriction will be removed in Version 2
ENERGY-10 Design Tool
ENERGY-10
National Renewable Energy Lab
project lead, passive solarbuildings expertise, PV
Sustainable BuildingsIndustry Councildistribution, user support
training
Lawrence BerkeleyNational Lab
daylighting
Berkeley SolarGroup
CNE thermal simulation engine
U.S. Department of Energy
funding and oversight
ENERGY-10 Design Tool
ENERGY-10
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…
ENERGY-10 Design Tool
ENERGY-10
Evaluate a wide range of energy-efficient strategies, working together
Daylighting
Economizer cycle
Reduced duct leakage
Reduced infiltration
Insulation
Lighting controlsEnergy efficient lights
and ballasts
Passive solar heating
Thermal mass
Shading
Better HVAC Controls
High Efficiency HVAC
Better windows
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 focuses on the first phases (conceptual design)
Develop Brief
Pre-design
Schematic Design
Design Development
Construction Documents
Develop reference caseDevelop low-energy case
Rank order strategiesInitial strategy selection
Set performance goals
Review goalsReview strategies
Set criteria, priorities
Develop schemesEvaluate schemesSelect scheme
Confirm that component performances
are as assumed
Phase
Activity
Tool
ENERGY-10
Preliminary teammeetings
ENERGY-10
EnergyPlusor other
HVAC simulationand tools
ENERGY-10 Design Tool
ENERGY-10
Automatic features make it easy and fastAutoBuild - defines a complete building based on five inputs and many defaultsAPPLY - creates a second building applying upgrades to implement any or all of 12 energy-efficient strategiesRANK - determines relative effectiveness of strategies
There are over 2000 registered users (Apr. 02)
83 site licensees are established. 60 of these are at colleges and universities where ENERGY-10 is being used as a teaching tool.
0.00% 10.00% 20.00% 30.00% 40.00%
manager
architect
analyst
academic
engineer
student
Multiple answers possible
0.00% 20.00% 40.00% 60.00% 80.00%
assembly
lodging
residential
education
retail
warehouse
office
restaurant
Non-residential adds to 128%
Building Types AnalyzedWho is using the program
ENERGY-10
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 has two powerful engines under the hood:
Daylighting DOE2 split flux methodThermal CNE thermal network
Each carries out 8760-hour detailed simulations. Thus interactive effects are accounted properly.
Completely integrated hourly calculations
12C
-8C
Range of other results
Range of other resultsCNE result
CNE result
CNE
Free floating temperatures
Strongly solar driven building
24 12 TIME OF DAY 24
Compare CNE results with other simulation programs, DOE-2, BLAST, EnergyPlus,SERI-RES, ESPr, etc.
ENERGY-10
ENERGY-10 Design Tool
ENERGY-10
Creates two building descriptions based on five inputs and user-defined defaults.
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 roofNo perimeter insulation R-10 perimeter insulationConventional double windows Best low-e double windowsConventional lighting Efficient lights with daylight dimmingConventional HVAC High efficiency HVACConventional air-tightness Leakage reduced 75% Uniform window orientation Passive solar orientationConventional HVAC controls Improved HVAC controlsConventional duct placement Ducts located inside, tightened
•Location•Building Use•Floor area•Number of stories•HVAC system
For example:
Gets you started quickly.
apply
ENERGY-10 Design Tool
ENERGY-10
0
20
40
60
80
100
kBtu
/ ft
²
Heating Cooling Lights Other Total
ANNUAL ENERGY USE
Reference Case
Low-Energy Case
30.7
0.2
10.75.7
15.1
6.6
19.314.9
75.8
27.4
20,000 ft2 elementary school
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 converts electrical and thermal energy use to annual emissions.
Pounds/year
CO2 NOx
ANNUAL EMISSIONS, Albuquerque School
Reference Case Low-Energy Case
399000
186000
1860
1020 970
530
SO2
Indicates the environmental impact
ENERGY-10 Design Tool
ENERGY-10
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!
kBtuh
heating CFM
HVAC RATED CAPACITIES, Albuquerque SchoolReference Case Low-Energy Case
802
349
687
478
29484
21162
cooling
Provides the right information at the right time.
ENERGY-10 Design Tool
ENERGY-10
Automatically modifies the building description to implement any or all of 12 strategies
A few mouse clicks does it—saving timeYet the user has total control
Heating
Cooling
Lights
Other
Total
Beforeapply
Afterapply
ENERGY-10 Design Tool
ENERGY-10
Daylighting improves occupant performance. - In rigorous statistical studies, involving 21,000 students in 3 school districts, test scores increased by 15% to 26% in those that were daylit. - In an otherwise identical group of 108 retail stores, sales increased by 31% to 49% in those that had daylighting, compared to those without!
See www.h-m-g.com
ENERGY-10 Design Tool
ENERGY-10
Daylighting + Thermal
N
S
W Ecore
kBtu / ft²
Heating Cooling Lights
w/o daylighting
with daylighting
3.3 4.6 8.9 7.6
17.3
7.8
ENERGY-10 accounts for complex interactive effects, such as those shown here (dimming lights in response to daylight reduces cooling but increases heating). Reductions in peak load are also evaluated, which effects equipment sizing.
Thermal network method(exact energy balance)12 equipment options
Split-flux method
ENERGY-10 Design Tool
ENERGY-10
Two-day workshops are a primary means of dissemination, providing critical instruction in the principles of energy efficient design and hands-on training in the use of ENERGY-10.
53 two-day workshops have been conducted. 1111 people have attended a workshop.
Average attendance is 21 persons.
ENERGY-10 Design Tool
ENERGY-10
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
ENERGY-10 Design Tool
ENERGY-10
EVALUATEMany powerful graphical views of the data
ADJUST create new weather files expands the available sites 16 fold
CONVERT FILE FORMATS
10
20
30
40
50
60
70
80
90
100
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan
Temp
eratur
e, °F
Temperatures Memphis, Tennessee
January 01 - 12 AM to January 01 - 12 AM
Dry Bulb
ENERGY-10 Design Tool
ENERGY-10
3865 locations on this map plus many in Hawaii and Alaska
monthly data are stored on the ENERGY-10 CD-ROM and are automatically loaded by the ADJUST wizard
ENERGY-10 Design Tool
ENERGY-10
From the beginning, the program has been developed in collaboration with architects and their their consultants
The Sustainable Buildings Industry Council disseminates the program, provides user support, and organizes the training program.
www.SBICouncil.org
ENERGY-10 Design Tool
ENERGY-10
Life-cycle cost calculationsNew approach to libraries
New approach to saving schemes
Many fixes to Version 1.3
Porting to Visual C++ 6.0 (many hidden benefits)
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 Design Tool
ENERGY-10
ENERGY-10 Design Tool
ENERGY-10
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
New ranking options in Version 1.5:
Net present value
Internal rate of return
Benefit/cost ratio
Simple payback
gives the relative savings
if strategies were to applied
individually
-20 0 20 40 60 80
Economizer CycleShading
High Efficiency HVACPassive Solar Heating
Air Leakage Control
HVAC ControlsEnergy Efficient Lights
Glazing
Insulation
Duct Leakage
Net Present Value, k$
78.39
66.38
45.96
40.82
38.73
35.89
26.22
21.12
13.67
Daylighting 48.85
2.85
RANKING OF ENERGY-EFFICIENT STRATEGIES
ENERGY-10 Design Tool
ENERGY-10
0
200
400
600
800
1000
1200
1400
SO2 NOx CO2
lbs
0
50000
100000
150000
200000
250000
Ann
ual C
O2
Em
issi
ons,
Pou
nds
Reference Case Low-Energy Case
1215
729662
382
249007
128607
0
100
200
300
400
Heating Cooling Fan
kBtu
h
0
2000
4000
6000
8000
10000
12000
Fan
Vol
ume,
CF
M
HVAC Rated CapacitiesReference Case Low-Energy Case
386
157
358
230
10741
6851
0
20
40
60
80
100
Loads Consumption Cost
Ann
ual E
nerg
y, k
Btu
/ sq
. ft.
0.0
0.2
0.4
0.6
0.8
1.0
Ann
ual C
ost,
$/sq
. ft.
Low-Energy Case - Performance Summary
OtherLightingCoolingHeating
1.3
40.2
10.3
34.2
2.97.6
10.3
34.2
86.0
55.1
$0.90
0.010.12
0.16
0.60
DMAP (3D color)
Solar gains in a passive solar building every hour of the year
Annual Emissions Results
Summary
ENERGY-10 Design Tool
ENERGY-10
Daily solar gains
Passive solar building
Typical monthly profilesInfiltration loads
tight
leaky
Altogether, there are about 10 times as many plotting options in Version 1.5 as in Version 1.3
ENERGY-10 Design Tool
ENERGY-10
Replaces “variants” in Version 1.3
Buildings saved individually as schemes, rather than in pairs.
Any two schemes that have been saved can be opened, side-by-side, and compared.
ENERGY-10 Design Tool
ENERGY-10
New whole approach to libraries.
User-named libraries, e.g. “GREGLIB”.
Libraries saved stored with the scheme, guaranteeing compatibility.
One password protected library (ARCHIVELIB) for classroom use.
New libraries for costs, EES strategies characteristics, defaults, etc.
ENERGY-10 Design Tool
ENERGY-10
Graphic input routine for building description
Improved daylighting calculations
PV simulations (already in Version 1.4 as an expert-user beta test)
ENERGY-10 Design Tool
ENERGY-10
Evaluate20000 ft2 school inAlbuquerque
Reference Case (energy hog)
Low Energy Case
Apply Strategies
ENERGY-10 Design Tool
ENERGY-10
Thanks for
your attention.