SEDAC - UIC Energy Resources Center
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Transcript SEDAC - UIC Energy Resources Center
Oct-11
Dec-11
Feb-12
Apr-12
Jun-12
Aug-12
Oct-12
Oct-11
Dec-11
Feb-12
Apr-12
Jun-12
Aug-12
Oct-12
Dec-12
Aug-11
Oct-10
Aug-10
Jun-10
Aug-11
0
Jun-11
5,000
Jun-11
10,000
Apr-11
15,000
Apr-11
20,000
Feb-11
Heating Deg Days
Feb-11
25,000
Dec-10
SBHS: Monthly Gas Usage
Dec-10
Oct-10
Aug-10
Jun-10
Apr-10
Feb-10
Dec-09
Oct-09
Aug-09
Jun-09
Off-Peak kWh
Apr-10
Feb-10
Dec-09
Oct-09
Aug-09
Jun-09
Apr-09
Feb-09
Dec-08
Oct-08
Aug-08
Jun-08
On-Peak kWh
Apr-09
Feb-09
Therms
Dec-08
Oct-08
Aug-08
Jun-08
Apr-08
Feb-08
Dec-07
Oct-07
Aug-07
Jun-07
Apr-07
Feb-07
Electricity (kWh)
300,000
Apr-08
Feb-08
Dec-07
Oct-07
Aug-07
Jun-07
Apr-07
Feb-07
Gas Use (therms)
BILL ANALYSIS
Now it is fixed.
SBHS: Monthly Electricity Usage
Cooling Degree Days
250,000
200,000
150,000
100,000
50,000
0
RETRO-COMMISSIONING
BENCHMARKING
SEDAC Illinois K-12 School Energy Use
Intensities
'09-'10
250
Gas kBtu/sf
Electric kBtu/sf
3.5
$/sf
3
200
'08-'09
150
2.5
2
'10-'11
1.5
1
50
• Note, this case is extreme but it’s not alone.
• It’s roughly 2.5 times the average use and cost.
46 - Elem
43 - HS
42 - HS
40 - Elem
38 - Pre-K
36 - Elem
34 - Elem
32 - Elem
30 - Elem
28 - MS
26 - Elem
24 - Elem
22 - HS
20 - Elem
18 - HS
16 - Elem
14 - HS
12 - Elem
10 - HS
8 - K-12
6 - MS
4 - Elem
0
2 - Elem
0
$/SF
0.5
1 - MS
KBTU/SF-YR
100
EXTRA CREDIT: RENEWABLES
Only consider renewables after implementing all of the previous ideas
The cost per unit energy saved of high efficiency equipment and
improved design is less than the cost per unit of energy of wind or solar
Renewables do, however, make great marketing and educational
opportunities and can be more affordable when incentives are
available
EXTRA CREDIT
Renewables:
•
•
•
Plan the infrastructure now for future
Select site-appropriate technologies
Use to take last step to net-zero
4
CASE STUDY
RENEWABLES
Savings from renewables not shown in savings table
3 kW solar array funded through ICECF
Program to put panels on all schools
This site does not have sufficient wind resources to
consider educational level turbine
CASE STUDY
SUMMARY
Energy Use Intensity
100.0
80.0
60.0
40.0
20.0
-
91.0
92.5
80.3
43.5
39.7
19.7
07/08
07/08
08/09
09/10
10/11
11/12
12/13
Total Incremental Cost
$546,120
Incentives
$340,508
Final Incremental Cost
$205,612
Annual Utility Savings w/o solar
$33,037
Simple Payback
6.2 years
IRR (5% acceptable)
Net Present Value (10 yr, 5%)
10.3%
$53,952
STRATEGY SUMMARY
Form & Environment
1. Orientation & Form
2. Insulation
3. Air Sealing
Loads
4. Lighting
5. Loads
Heating, Ventilating, & Air Conditioning
6. Heating
7. Cooling
8. Motors & Pumps
9. Building Automation
10. Commissioning
How SEDAC can help with
new construction…
Design Assistance
Public sector
Private sector
Incentive Review
Public Sector
Services are funded by
DCEO or Utility at no
charge to the project or
owner