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