the green schools approach at poolesville high school
DESCRIPTION
The Green Schools Approach at Poolesville High School. Starting Small…. Using The Tools. Computers…. Best approach? Leave on Sleep mode Shutdown. Cost of One Computer…. For One School Day. Cost of One Computer…. For One Non-school Day. Cost of One Computer…. During the Entire Year. - PowerPoint PPT PresentationTRANSCRIPT
The Green Schools Approach at Poolesville
High School
Starting Small…Starting Small…ComputersComputers Soda MachinesSoda Machines
Using The Tools
Computers…Computers…Best approach?
•Leave on
•Sleep mode
•Shutdown
Cost of One Computer…Cost of One Computer…
During During School School Hours:Hours:
E=Pt E=Pt
=100W(8h) =100W(8h)
=800Wh=800Wh
=.800 kWh=.800 kWh
.8 kWh($.08/kWh)= .8 kWh($.08/kWh)= $.06$.06
Outside Outside School School Hours:Hours:
E=Pt E=Pt
=37W(16h) =37W(16h)
=592Wh=592Wh
=.592 kWh=.592 kWh
.592kWh($.08/.592kWh($.08/kWh)=$.05kWh)=$.05
Total: $.11 for one computer per day during the Total: $.11 for one computer per day during the School YearSchool Year
For One School Day
Cost of One Computer…Cost of One Computer…
During The During The
Summer/Summer/
Weekends:Weekends:
E=Pt E=Pt
=37W(24h) =37W(24h)
=888Wh=888Wh
=.888 kWh=.888 kWh
.888 kWh($.08/kWh)= .888 kWh($.08/kWh)= $.07$.07
Total: $.07 for one computer per day during the Total: $.07 for one computer per day during the summer/weekendssummer/weekends
For One Non-school Day
Cost of One Computer…Cost of One Computer…
During The School During The School Year:Year:
($.11/day)(180 school days/year)=($.11/day)(180 school days/year)=
$19.80 for one computer during the school year$19.80 for one computer during the school year
During The During The
Summer/Summer/
Weekends:Weekends:
($.07/day)(185 non-school days/year)=($.07/day)(185 non-school days/year)=
$12.95 for one computer during the summer $12.95 for one computer during the summer and on weekendsand on weekends
Total for the entire year for one computer: Total for the entire year for one computer:
$19.80 + $12.95 = $19.80 + $12.95 = $32.75$32.75 for one computer per year for one computer per year
During the Entire Year
Total Cost of Computer System…Total Cost of Computer System…
($32.75 per computer/year)(220 computers)=($32.75 per computer/year)(220 computers)=
$7205.00 for all 220 computers over the course of one year$7205.00 for all 220 computers over the course of one year
($.06 during school hours/day)(180 days/year)(220 computers)= ($.06 during school hours/day)(180 days/year)(220 computers)= $2376.00 for all 220 computers during school hours over the course $2376.00 for all 220 computers during school hours over the course
of one yearof one year
Total amount saved: $4829.00Total amount saved: $4829.00
Soda Machines…Soda Machines…
Asset or Liability?Asset or Liability?
Per Machine:::Per Machine:::
- MCPS: $300 per year- MCPS: $300 per year
- Must make at least $48.68 per month- Must make at least $48.68 per month
In total:::In total:::
- 12 machines = $3600.00 per year- 12 machines = $3600.00 per year
DATE 2002 20038/25 – 9/23 192,977 kWh 148,179 kWh
9/24 – 10/22 135,829 kWh 124,712 kWh
10/23 – 11/23 135,804 kWh 134,340 kWh
11/24 - 12/23 167,628 kWh 153,431 kWh
TOTAL 632,238 kWh 560,662 kWh
Comparison of Savings Before and After Green Schools Initiative
632,238 kWh632,238 kWh
kWh kWh - 560,662 kWh- 560,662 kWh
SAVED SAVED 71,576 kWh71,576 kWh
71,576 kWh($.068/kWh) =71,576 kWh($.068/kWh) =
Money Saved $4,867Money Saved $4,867
First Semester Savings