Idaho Central Credit Union Headquarters - Pocatello
Lombard Conrad Architects - Boise
MODEL STUDIES
01_20_05 Tests
Integrated Design Lab l Boise
Managed by the University of Idaho - Department of Architecture
phone
fax
208.724.9456
208.343.0001
Model Testing - Lighting
Overcast Sky Simulator
Heliodon Solar Simulator
Heliodon Testing
Direct Beam of the Sun
Heliodon
Direct Sun Simulator
Overcast Sky
Mirror Box
Artificial Sky Simulation
Overcast Sky Simulation
The purpose for these studies is to simulate actual illumination
levels inside the building. Overcast light is used to determine a
set of daylight factors, the percentage of available daylight that
reaches the interior space. Quantitative and Qualitative data
are collected using photocells and photography.
Overcast Sky Simulation
Training Room
Baseline
Photos taken with identical camera settings.
Overcast Sky
Simulation
With Lightshelf and Overhang
Overcast Sky
Simulation
Training Room Comparison
Training Room Baseline
14.0
Baseline
12.0
median daylight
factor :
10.0
8.0
3.5%
12-14
DF
10-12
8-10
6.0
6-8
4-6
2-4
4.0
0-2
2.0
0.0
S7
S6
Photocell Location
S5
S4
S3
Training Room Comparision
S2
9
S1
8
7
6
5
4
3
1
2
Photocell Location
18.0
Training Room w Lightshelf and Overhang
16.0
12.0
10.0
8.0
6.0
4.0
(DF) Percent of Outdoor Illumination Indoors
14.0
16.0
12.0
10.0
Baseline
W ovrhng & ltshlf
4.0%
14-16
8.0
0.0
0.0
6
5
4
3
2
1
Photocell Location
S6
S5
S4
S3
S2
Photocell Location
10-12
6-8
2-4
S7
7
12-14
4-6
4.0
2.0
8
DF
8-10
6.0
2.0
9
W Lightshelf
/ Overhang
14.0
median daylight
factor :
S1
9
8
7
6
5
4
3
2
Photocell Location
1
0-2
Overcast Sky
Simulation
Corridor (no shelf)
Baseline
Corridor Data (no shelf)
14
12
Daylight Factor
10
8
Series2
6
4
2
0
1
2
3
4
Photocell
5
6
7
Median DF:
1.35%
Retail Sales
(1st
Overcast Sky
Simulation
Floor)
Three Lines of Data in Sales
Baseline
C B A
14
12
A
B
10
C
5.6%
A
B
C
East Line
DF
median daylight
factor :
8
Mid Line
W est Line
6
4
2
0
1
2
3
4
5
Photocell Location
6
7
8
9
Lending
2nd
floor
Baseline
**Photo Taken with Identical Camera Settings
Overcast Sky
Simulation
With Lightshelf and Overhang
Lending
(2nd
Overcast Sky
Simulation
Floor) Comparison
Lending Baseline
12.0
Baseline
10.0
average daylight
factor :
8.0
6.0
4.7%
DF
10-12
8-10
6-8
4.0
4-6
2-4
0-2
2.0
S4
Series 1
S2
Photocell Location
S3
S7
S6
S5
0.0
6
7
8
9
5
4
3
1
2
Photocell Location
Lending (2nd Flr) Comparison
Lending W Shelves
12.0
12.0
W Lightshelf
/ Overhang
10.0
average daylight
factor :
8.0
10.0
6.0
DF
8.0
2.4%
10-12
6.0
DF
8-10
6-8
4-6
2-4
4.0
4.0
2.0
2.0
0.0
9
8
7
6
5
Photocell Location
4
3
2
1
0.0
S7
Photocell Location S6 S5
S4
S3
S2
S1
9
8
7
6
5
4
3
2
Photocell Location
1
0-2
Marketing
(2nd
Overcast Sky
Simulation
Floor)
Baseline
Marketing (2nd Floor)
12.0
10.0
median daylight
factor :
8.0
3.5%
6.0
DF
10-12
8-10
6-8
4.0
4-6
2-4
0-2
2.0
0.0
S7
S6
2
S5
3
4
S4
Photocell Location
5
S3
6
S2
7
8
S1
9
Photocell Location
1
Overcast Sky
Simulation
Floor)
Webinair (2nd Floor Core Rooms)
12.00
10.00
8.00
DF
Conference Room
(2nd
Series1
6.00
4.00
2.00
0.00
1
2
Photocell Location
Core Rooms
1.2
1.5
.92
.74
.67
.66
.77
.86
1.14
(2nd
Overcast Sky
Simulation
Floor)
.7
1.0 1.2
1.4 1.0
1.0
1.4 1.0
1.1 1.2
.5
.5
.6
.5
.6
.5
.6
.6
1.5
.9
.5
.4
.38
.47
.55
.85
The purpose for these studies is to better understand the patterns of
direct sun on the site and in the building interior. These tests are not
meant to simulate actual illumination, but show when and where
direct sun penetrates the building.
Heliodon – Direct Sun Simulation
Training Room Baseline
Direct Beam of the
Sun Simulation
Interior View, Looking West
June 21 – 12PM
September 21 – 12PM
The Training Room receives direct sun
for nine hours, from 10 am until 7 pm.
The Training Room receives direct sun
for 12 hours, from 7 am to 7 pm.
December 21 – 12PM
The Training Room receives direct
sun for eight hours, from 8am-4 pm.
Training Room w Overhang and Lightshelf
Direct Beam of the
Sun Simulation
Interior View, Looking West
June 21 – 12PM
September 21 – 12PM
The Training Room now receives
minimal direct sun from 7pm-9pm.
The Training Room receives greatly
reduced direct sun from 7AM – 10AM and
from 3PM-7PM.
*** Morning sun could be reduced if
lightshelf continued around East
Windows.
*** This could be further remedied with
overhang/lightshelf on East Windows.
December 21 – 12PM
The Training Room now receives ½ of
the direct sun all day from 8am - 4pm.
Direct Beam of the
Sun Simulation
Retail Sales Baseline
Interior View, Looking West
June 21
September 21 – 7AM
The Retail Sales Room receives direct
sun from 5AM-9AM.
The Retail Sales Room receives direct sun
from 7AM-8AM.
December 21
The Retail Sales Room now receives zero
direct sun penetration.
Lending Room
(2nd
floor) Baseline
Direct Beam of the
Sun Simulation
Interior View, Looking East
June 21 – 12 PM
September 21 – 12 PM
The Lending Room receives minimal
direct sun from 10 hours from 9AM –
7PM.
The Lending Room receives direct sun for
12 Hours from 7am to 7pm.
December 21 – 12PM
The Lending Room receives direct sun
for 8 Hours from 8am to 4pm.
Lending Room
(2nd
floor) w Ovrhng & Ltshelf
Direct Beam of the
Sun Simulation
Interior View, Looking East
June 21 – 12 PM
September 21 – 12 PM
December 21 – 12PM
The Lending Room receives minimal
direct sun for 2 hours, one hour very
early in the morning and one hour
very late in the day..
The Lending Room now receives Mininal
direct sun for 4 Hours, two hours early in
the morning and two hours late in
afternoon.
The Lending Room receives roughly ½
the direct sun for 8 Hours from 8am to
4pm.
Marketing
(2nd
Floor)Baseline
Direct Beam of the
Sun Simulation
Interior View, Looking West
June 21
September 21 – 7AM
December 21
The Marketing Room receives direct
sun from 5AM-9AM.
The Marketing Room receives direct sun
from 7AM-8AM.
The Marketing Room now receives zero
direct sun penetration.
Refining the Window
40% or less).
An interior roll-down shade can control direct sun
without significantly reducing the ability of the
window to provide views to the exterior. Always
use a dark colored surface on the interior of the
roll-down shade fabric. This allows for a
comfortable view through the fabric, and
provides room-darkening capabilities.
Newer, woven fiberglass fabrics, provide a dark
interior surface while maintaining a light colored
exterior surface. The bright exterior surface
reflects much of the solar heat gain back out
through the window while the dark interior
surface allows for a maintained view corridor
from the interior.
S
Use a Roll-Down Shade to Control Direct Sun in
the “View” Window
American Honda - Portland, OR
GROUP MACKENZIE ARCHITECTS
PHYSICAL MODEL TESTS, NOVEMBER 2000
PROJECT COMPLETION, 2002
North Mall Office Building
Yoste Grube Hall, Portland, OR
April,2001 Tests
Model Testing - Energy
Energy Modeling Desciption
PROPOSED Integrated Energy Design Strategies
Idaho Control Credit Union Project
1/10/05
Included in Modeling
Not Included in Modeling
Creating Small Loads
Use energy model to predict the loads associated with implementation of the strategies listed below.
Provide a peak loads report to the design team, complete with disaggregated building-wide loads for peak
heating, cooling, and electrical demand.
Design team can use this to compare and refine their own load
calculations.
•Reduce heating design differential temperature from to 72 F (from 90F) representing ASHRAE 99% outdoor
condition for Pocatello.
•Increase summer design temperature to 74 F (from 72 F).
•Use illuminance criteria as noted in 12/22/04 memo and 12/7/04 memo (Eidam and Associates).
•Reduce window glazing (as has apparently already been done). Make sure that peak cooling loads are
accounting for this.
Reduce Loads
Use energy model to overlay these strategies onto the loads model (see above) to further demonstrate load
reduction, and to identify the energy savings (and annual energy cost savings) associated with these
strategies. Elements can be modeled as a package or individually depending upon the decision requirements
of the owner and design team.
•Use high performance glazing, exterior shading elements, and glare control elements that distinguish
between view glazing and daylight glazing.
•Use 1.0 w/sf for building-wide lighting load and 1.0 w/sf for building-wide equipment load.
Consider
accounting for daylight dimming in peak cooling load calculation.
•Use high performance T8 lamps with best available electronic dimming ballasts instead of T5HO lamps.
(See attached light source comparison, and press release for new high ballast factor 4-lamp dimming
ballast (to dim 8-foot 2-lamp profile I/D fixture).
•Install continuous dimming controls in all daylit zones (per memo dated 12/22/04 from Eidam and
Associates)
•Put egress lighting on automatic occupancy-based control (as is indicated in 12/22/04 memo from Eidam and
Associates)
Energy Modeling Desciption
Efficient Systems
Use energy model to overlay these strategies onto the loads models (see above) to further to identify the
energy savings (and annual energy cost savings) associated with these strategies. Elements can be modeled
as a package or individually depending upon the decision requirements of the owner and design team.
•Size system at or about 60,000 cfm as indicated in 1/3/05 memo from Engineering, Inc.
This appears to
correspond well with energy models (after input of LPD/EPD at 1.0 w/sf, but before reduction of window
area).
•Investigate ways to reduce total required pressure drop.
Can pressure requirements be reduced to less
than 4” total (between supply and return fan)? This has been done numerous times with underfloor air
systems on other projects.
•Maximize efficiency of fans, pumps, and motors.
Fan example: 30,000 cfm @ 4” TSP (36” AF fan for York CurbPak is 62% ME & 30.5 bhp (best
York can do in CurbPak line apparently) Select 40 hp motor, similar to Toshiba PE motor (94.7% at 75%
loaded for 40 hp).
Results in 24 kW total supply fan/electric motor load.
Synergy with pressure reduction strategy: Note that CurbPak fans selected at 3” or 2.5” TSP exhibit
increasing mechanical efficiencies up to 44” diameter AF wheels. At 3” TSP, 44” wheel is rated at 22.64
bhp (62.5% efficiency). At 2.5”, 44” wheel is rated at 18.8 bhp (64.3% efficiency).
•Use condensing boilers (90%+ fuel conversion efficiencies) with heating water reset capability for space
heating with separate boilers for snow-melt at 180F.
•Specify highest efficiency DX cooling available (EER of 9.5 or greater).
•Use energy recovery ventilator for pre-tempering of minimum ventilation air. Account for heat recovery
when sizing boilers.
eQuest Models Studies were
*** ADDITIONAL
conducted to account for 193 rotation
O
of building. See Attached.
Utility Cost Comparison (eQuest Energy Model)
eQuest Energy
Modeling
Potential Savings:
$41,777
Baseline Run
EEM Package
Utility Cost Comparison (building plan 193 rotation)
O
eQuest Energy
Modeling
***
Potential Savings:
This version costs $1,685/yr more than previous
Baseline Run
$43,172
This version costs $290/yr more than previous
EEM Package
Annual Enduse Comparison (eQuest Energy Model)
eQuest Energy
Modeling
$12,750
$29,155
$11,638
$24,166
Baseline Run
EEM Package
Annual Enduse Comparison (building plan 193
O
eQuest Energy
rotation) Modeling
***
$12,767
$29,404
$11,802
$24,921
Baseline Run
EEM Package
HVAC System Design Loads (eQuest Energy Model)
Baseline Run
EEM Package
eQuest Energy
Modeling
HVAC System Design Loads (building plan 193
***
Baseline Run
EEM Package
O
eQuest Energy
rotation) Modeling
Electric Lighting Controls (LDL)
Electric Lighting
(compared to open loop)
(compared to open loop)
Fluorescent light source comparison (4 foot lamps w/o dimming ballasts)
Baseline
Option 1
Option 2
Option 3
Parameter
28w, NBF IS
Ballast
32w, NBF IS Ballast
32wPrem, Prog.
Start Ballast
T5HO System
Lamp Type
F28T8/835X
P/SS/ECO
F32T8/835
F32T8/835/XPS/EC
O
F54T5HO
Mean Lumens
2,560
2,714
2,945
4,650
Initial Lumens
2,725
2,950
3,100
5,000
82
82
86
82
18,000
20,000
30,000
20,000
Lamp Watts
28
32
32
54
Lamp Qty
4
4
4
2
IS, Normal
BF
IS, Normal BF
2-lampPSN
2-l T5HO
O/S
O/S
O/S
O/S
QT4x32/IS
QT4x32/IS
QTP4x32/PSN
QT2x54/PHO
Ballast Factor
0.88
0.90
0.88
1.00
Input Watts
100
114
115
120
Power Factor
0.99
0.99
0.99
0.99
System Output (Mean Lumens)
9,011
9,770
10,366
9,300
Percent of Existing System Output
100%
108%
115%
103%
90.1
85.7
90.1
77.5
Percent of Existing Efficacy
100%
95%
100%
86%
Load Reduction, per fixture
0
-14
-15
-20
0.0%
-14.0%
-15.0%
-20.0%
CRI
Lamp Life (Hours)
Ballast Type
Ballast Manufacturer
Ballast Catalog No
System Efficacy (Lumens/Watt)
Percent Load Reduction
August 17, 2004 07:42
Dimming Ballast offers ballast
factor of 1.18.
Packaged in low-profile housing, Mark 7
0–10 V Electronic Dimming Ballast is
rated at 277 V, allowing operation of
four 32 W T8 fluorescent lamps. With
dimming ability down to 3% relative
light output, ballast will operate
between 149 and 27 W. Unit includes
programmed-start lamp ignition, total
harmonic distortion below 10%,
automatic restrike, and operation above
42 kHz. It is suited for big box retail,
warehouse, and commercial
applications.
The two best lamps are the “highperformance” 28 watt T8 and the 32 watt T8
lamps that, in combination with the right ballasts
obtain efficacies over 90 lumens/watt. Note that
the 28 watt T8 cannot be dimmed and is probably
not suitable for daylighting applications. Also
note that T8 dimming ballasts are about half the
cost of T5HO dimming ballasts.
BETTERBRICKS.COM
1 888 216 5357
FOUR KEY CHARACTERISTICS
OF A BETTERBRICKS BUILDING
TAKES ADVANTAGE OF DAYLIGHT
ENHANCES HUMAN PERFORMANCE
INTEGRATED DESIGN PROCESS
Ph 208.724.9456
Fx 208.343.0001
kevinv@uidaho.edu
COMMISSIONED