Electrical Energy Survey of My Apartment |
1/15/2003 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Constants |
|
|
|
|
|
Line Voltage
(V) |
115 |
|
|
|
|
Energy Cost
($ per Kilowatt-Hour) |
$0.06 |
|
|
|
|
|
Temperature |
20F |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Category |
Rated Current |
Measured Current
(A) |
Measured Current
Standby (A) |
Measured Power
Active(W) |
Measured Power
Standby (W) |
Daily device
Usage (Estimated, in Hours) |
Daily Energy
Requirement (in KiloWatt*Hrs) |
Daily Cost of
Operation |
Notes |
Computing |
|
|
|
|
|
Router/CableModem/10/100
Switch |
|
1.200 |
NA |
138.000 |
NA |
24.0 |
3.312 |
$0.20 |
|
Monitor |
|
1.500 |
0.100 |
172.500 |
11.500 |
10.0 |
1.725 |
$0.10 |
1152x864x16.7M, 100Hz |
PC (1.7GHz
P4) |
|
5.000 |
0.200 |
575.000 |
23.000 |
24.0 |
13.800 |
$0.83 |
3A with HDDs off, 5A
max |
PC (800Mhz
Celeron) |
|
2.500 |
0.200 |
287.500 |
23.000 |
24.0 |
6.900 |
$0.41 |
|
Printer (HP
LaserJet 4P) |
|
3.500 |
0.500 |
402.500 |
57.500 |
0.0 |
0.000 |
$0.00 |
Measured while
printing |
Scanner |
1.25A |
1.250 |
0.200 |
143.750 |
23.000 |
0.0 |
0.000 |
$0.00 |
|
Subtotal (Max): |
|
14.950 |
1.200 |
1719.250 |
138.000 |
|
25.737 |
$1.54 |
|
|
|
|
|
|
|
|
|
Entertainment |
|
|
|
|
|
|
|
TV |
|
2.800 |
0.450 |
322.000 |
51.750 |
10.0 |
3.220 |
$0.19 |
|
XBOX |
|
2.200 |
0.200 |
253.000 |
23.000 |
0.0 |
0.000 |
$0.00 |
|
VCR1 (Sony) |
|
1.000 |
0.800 |
115.000 |
92.000 |
6.0 |
0.690 |
$0.04 |
Measured while
recording |
VCR2 (JVC) |
|
1.050 |
0.400 |
120.750 |
46.000 |
0.0 |
0.000 |
$0.00 |
Measured while
recording |
DVD |
|
1.000 |
0.200 |
115.000 |
23.000 |
0.0 |
0.000 |
$0.00 |
|
LaserDisc |
|
0.300 |
0.000 |
34.500 |
0.000 |
0.0 |
0.000 |
$0.00 |
|
Subtotal (Max): |
|
8.350 |
2.050 |
960.250 |
235.750 |
|
3.910 |
$0.23 |
|
|
|
|
|
|
|
|
|
Cooking |
|
|
|
|
|
|
|
Microwave 1000W |
8.696 |
12.500 |
NA |
1,437.500 |
NA |
0.0 |
0.000 |
$0.00 |
|
Can Opener |
1.500 |
0.900 |
NA |
103.500 |
NA |
0.0 |
0.000 |
$0.00 |
|
Coffee Maker
4 cup |
5.435 |
4.050 |
NA |
465.750 |
NA |
0.3 |
0.116 |
$0.01 |
|
George
Foreman Grill |
12.174 |
9.250 |
NA |
1,063.750 |
NA |
0.0 |
0.000 |
$0.00 |
|
Subtotal (Max): |
|
26.700 |
|
3,070.500 |
|
|
0.116 |
$0.01 |
|
|
|
|
|
|
|
|
|
Misc |
|
|
|
|
|
|
|
Cellphone Charger |
|
0.150 |
0.000 |
17.250 |
0.000 |
24.0 |
0.414 |
$0.02 |
|
Lighting |
|
1.100 |
NA |
126.500 |
NA |
10.0 |
1.265 |
$0.08 |
2 Rooms, all
fluorescent |
Clock |
0.043 |
0.043 |
NA |
4.945 |
NA |
24.0 |
0.119 |
$0.01 |
|
Battery
Charger |
0.800 |
0.800 |
NA |
92.000 |
NA |
4.0 |
0.368 |
$0.02 |
|
Refrigerator |
|
3.500 |
NA |
402.500 |
NA |
24.0 |
9.660 |
$0.58 |
|
Subtotal (Max): |
|
5.593 |
|
643.195 |
|
|
11.826 |
$0.71 |
|
|
|
|
|
|
|
|
|
Environmental Control |
|
|
|
|
|
|
|
20" Industrial Fan #1 |
2.600 |
1.500 |
0.000 |
172.500 |
0.000 |
16.0 |
2.760 |
$0.17 |
|
20"
Industrial Fan #2 |
2.600 |
1.500 |
0.000 |
172.500 |
0.000 |
16.0 |
2.760 |
$0.17 |
Seasonal - only
during summer |
Heat (Nat Gas
- fan only) |
|
1.000 |
NA |
115.000 |
NA |
24.0 |
2.760 |
$0.17 |
Doesn't include Nat
Gas Costs |
Heat (1500W
Electric) |
|
13.043 |
NA |
1,500.000 |
NA |
24.0 |
36.000 |
$2.16 |
Emergency use only |
AC Small
Window Unit |
|
10.435 |
NA |
1,200.000 |
NA |
24.0 |
28.800 |
$1.73 |
|
Subtotal (Max Required) |
|
16.043 |
|
1,845.000 |
|
|
41.520 |
$2.49 |
|
Subtotal (Average Summer) |
|
13.435 |
|
1,545.000 |
|
|
34.320 |
$2.06 |
|
Subtotal (Average Winter) |
|
2.500 |
|
287.500 |
|
|
5.520 |
$0.33 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Conclusions |
|
|
|
|
|
|
|
Total (Standby) |
|
|
|
|
373.750 |
24.0 |
8.970 |
$0.54 |
This does not
factor in daily usage, so it is higher than would be experienced with daily
usage - this represents power when everything is off, like when I'm on
vacation. |
Total (Max
Power Required) |
|
71.636 |
|
8,238.195 |
|
|
83.109 |
$4.99 |
This
factors in daily usage, so it may be lower than other totals. |
Total (Avg
Summer) |
|
69.028 |
|
7,938.195 |
|
|
75.909 |
$4.55 |
This
factors in daily usage, so it may be lower than other totals |
Total (Avg
Winter) |
|
58.093 |
|
6,680.695 |
|
|
47.109 |
$2.83 |
This
factors in daily usage, so it may be lower than other totals |
Yearly Total |
|
63.560 |
|
7309.445 |
|
|
61.509 |
$3.69 |
This
factors 6 mos summer, 6 mos winter |
Total
(Emergency in Winter) |
|
16.093 |
|
1850.695 |
|
|
|
|
Factors
here are communications, server, refrigeration, lighting at night. Turn off TV when Monitor is on and VV. Heat and cook with Propane stored in 20lb
bottle. Size a quiet generator based
on this. |
Total
(Emergency in Summer) |
|
15.093 |
|
1735.695 |
|
|
|
|
Factors
here are maintaining a fan, communications, server, refrigeration, lighting
at night. Cook with Propane stored in
20lb bottle. Turn off TV when Monitor
is on and VV. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion Factors |
|
|
|
|
|
|
|
|
|
|
Volume |
|
|
|
|
|
1 gal = 0.00378541m^3 |
|
|
|
|
|
1 ft^3 = 0.02831685 m^3 |
|
|
|
|
|
1 m^3 = 35.3146 ft^3 |
|
|
|
|
|
1 gal = 0.133680 ft^3 |
|
|
|
|
|
|
|
|
|
|
|
Energy |
|
|
|
|
|
1 cal = 4.186 J |
|
|
|
|
|
1eV = 1.6E-19 J |
|
|
|
|
|
1KWH = 3.6E6 J |
|
|
|
|
|
1 BTU = 1.054E3 J |
|
|
|
|
|
1 J = 1 W*sec |
|
|
|
|
|
|
|
|
|
|
|
Power |
|
|
|
|
|
1W = 1J/sec |
|
|
|
|
|
1 BTU/hr = 0.293W |
|
|
|
|
|
1 BTU = .293 W*hr |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|