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Energy Case Studies
These articles, case studies, statistics, and product briefings demonstrate
various principles of sound energy management.
Arc Welding
Building and automation systems – commercial and industrial
- Power
reliability at the Banco Central building, Brasília, Brazil Johnson
Controls
- Multiple
systems integration at Canada Place, Vancouver, British Columbia (.pdf) Johnson
Controls
- Improved
facility management at Cessna Aircraft Company, Wichita, Kansas Johnson
Controls
Building and automation systems – government, education, and health care
- Energy
Monitoring & Controls System at the Pentagon, Washington, D.C.
Johnson
Controls
- Lighting
retrofits and other energy efficient product upgrades at the Broward County
Judicial Complex, Fort Lauderdale, FL Johnson
Controls
- Large-scale
facility management system at Children's Hospital of The King's Daughters,
Norfolk, Virginia Johnson
Controls
- Integrated Building Automation System at
Frederick Community College, Frederick, Maryland
Johnson
Controls
Carbon/manufactured graphite
- Airport, highway, and public area snow-removal energy costs
reduced. Superior
Graphite Co. offers SnowFree®, a heated pavement system for
the efficient removal of snow.
- Aerospace and Automotive part production - decreased energy
costs in the production of parts. Superior
Graphite Co. offers a patented technology that increases efficiency in
the densification of advanced materials.
Deregulation
- ASCO's
deregulation center contains information
related to deregulation of the energy industry and distributed generation,
including a
new 16 page Q&A brochure.
Also provides information
on
switchgear, controls, and other equipment and services used to interconnect
distributed generation systems.
Lamps
|
Energy
and Cost Savings from Replacing an Incandescent Lamp with a Compact
Fluorescent Lamp |
| Item |
27 Watt Compact Fluorescent
|
100 Watt Incandescent
|
|
Lumens
|
1800
|
1750
|
|
Cost of Lamps
|
$14.00
|
$0.50
|
|
Lamp Life
|
1,642.5 Days (4.5 yrs)
|
167 days
|
|
Annual Energy Use
|
59 kWh
|
219 kWh
|
|
Annual Energy Savings
|
160 kWh
|
-
|
|
Lifetime Energy Savings
|
720 kWh
|
-
|
|
Annual Energy Cost (¢6/kWh)
|
$3.54
|
$13.14
|
|
Lamps Replaced in 4.5 years
|
0
|
10
|
|
Total Cost
|
$29.96
|
$64.13
|
|
Savings Over Lamp Life
|
$34.17
|
0
|
|
Source: DOE, Energy Efficiency and Renewable Energy Network, EREC Ref. Brief |
Lighting
controls
|
Lighting
Controls & Energy Operating Cost Comparison:
Open
Office Area, 1000 sq.ft. |
| Performance |
Base Case
|
Time Scheduling
|
Occupancy Sensors
|
Daylighting
|
Time Scheduling + Daylighting
|
|
Annual Energy Use
|
5,700 kWh
|
5,100 kWh
|
5,000 kWh
|
4,200 kWh
|
3,700 kWh
|
|
Annual energy Savings
|
-
|
600 kWh
|
700 kWh
|
1,500 kWh
|
2,000 kWh
|
|
Annual Energy Cost (¢6/kWh)
|
$340
|
$305
|
$300
|
$250
|
$220
|
|
Annual Energy Cost Savings
|
-
|
$35
|
$40
|
$90
|
$120
|
|
Source: Dept. of Energy, Fed. Energy Mgmt. Prog. Prod. Efficiency Recommendations, Nov. 2000 |
Luminaires
|
Fluorescent
Luminaire Cost-Effectiveness Example (2’ x4’ recessed, lensed) |
| Performance |
Base Model
|
Recommended Level
|
Best Available
|
|
Luminaire Efficacy Rating
|
32
|
62
|
77
|
|
Luminaire Light Output
|
3,600 lumens
|
3,700 lumens
|
4,400 lumens
|
|
Power Input
|
113 watts
|
60 watts
|
57 watts
|
|
Annual Energy Use
|
407 kWh
|
216 kWh
|
205kWh
|
|
Annual Energy Savings
|
-
|
191 kWh
|
202 kWh
|
|
Lifetime Energy Savings (15 yrs)
|
-
|
2,865 kWh
|
3,030 kWh
|
|
Annual Energy Cost (¢6/kWh)
|
$24
|
$13
|
$12
|
|
Lifetime Energy Cost
|
$260
|
$140
|
$130
|
|
Lifetime energy cost Savings
|
-
|
$120
|
$130
|
|
Source: Dept. of Energy, Fed.
Energy Mgmt. Prog. Prod. Efficiency Recommendations, Nov. 2000 |
Motors
|
Motor
Cost –Effectiveness Example
(50
Horsepower, 1800 rpm) |
| Performance |
Base Model
|
Recommended Level
|
Best Available
|
|
Full-Load Efficiency
|
93.00%
|
94.50%
|
95.00%
|
|
Annual energy Use
|
160,430 kWh
|
157,880 kWh
|
157,050 kWh
|
|
Annual Energy Savings
|
-
|
2,550 kWh
|
3,380 kWh
|
|
Lifetime Energy Savings (18 yrs)
|
$9,630
|
45,900 kWh
|
60,840 kWh
|
|
Annual Energy Cost (¢6/kWh)
|
$115,000
|
$9,470
|
$9,420
|
|
Lifetime energy Cost
|
-
|
$113,200
|
$112,600
|
|
Lifetime energy cost Savings
|
|
$1,800
|
$2,400
|
| Source:
Dept. of Energy, Fed. Energy Mgmt. Prog. Prod. Efficiency
Recommendations, Nov. 2000 |
Transformers
|
Transformer
Cost-Effectiveness Example
(1500
kVa, Three Phase, Medium voltage Dry-type) |
| Performance |
Base Model
|
Recommended Level
|
|
Efficiency
|
98.60%
|
99.00%
|
|
Annual Energy Loss
|
91,380 kWh
|
66,360 kWH
|
|
Annual Energy Loss Cost (¢6/kWh)
|
$5,480
|
$3,980
|
|
Annual Energy Savings
|
-
|
25,020 kWh
|
|
Lifetime Energy Cost (25 years)
|
$81,300
|
$59,000
|
|
Lifetime Energy Cost Savings
|
-
|
$22,300
|
|
Lifetime Energy Savings
|
-
|
625,500 kWh
|
| Source:
Dept. of Energy, Fed. Energy Mgmt. Prog. Prod. Efficiency
Recommendations, Nov. 2000 |
|
Transformer
Cost-Effectiveness Example
(25kVa,
Single Phase, Low Voltage) |
| Performance |
Base Model
|
Recommended Level
|
|
Efficiency
|
96.70%
|
98.00%
|
|
Annual Energy Loss
|
2,600 kWh
|
1,570 kWH
|
|
Annual Energy Loss Cost (¢6/kWh)
|
$156
|
$94
|
|
Annual Energy Savings
|
-
|
1,030 kWh
|
|
Lifetime Energy Cost (25 years)
|
$2,300
|
$1,400
|
|
Lifetime Energy Cost Savings
|
-
|
$900
|
|
Lifetime Energy Savings
|
-
|
25,750 kWh
|
|
Source: DOE, Energy
Efficiency and Renewable Energy Network, EREC Ref. Brief |
Transmission
& Distribution
-
This
newsletter
from ASCO, a division of Emerson, discusses distributed generation,
power reliability, web-enabled energy management, and information about the
California energy crisis.
NEMA
members can submit
energy-related product information and
case studies to be included in the Energy Solutions Center.
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