|
Here is a
load table for two example households. Both of these
homes provide the same functionality, meeting the same
needs and luxuries for their inhabitants. The only difference
between these two homes is the efficiency of the electricity
use.
Home 1 represents
the use of some inefficient appliances; name brand refrigerator
and incandescent lights are used. Also, the inhabitants
of this home ignore the phantom loads allowing them
to run constantly. Notice that each phantom load has
its own entry on the load table representing the power
used by that appliance when turned off.
Home 1 uses
an average of almost 7.4 kWh of electricity each day.
At $.65 per kWh this adds up to about $4.80 per day
for electricity.
Home 2 represents
a more efficient use of electricity. Compact fluorescent
lights and an efficient refrigerator. Also, phantom
loads are completely eliminated by the use of switched
plug strips. These are the only differences between
Home1 and Home 2. However, Home 2 only uses about 4
kWh per day of electricity. At $.65 per kWh this is
about $2.53 per day for electricity.
The $2.27
daily difference between Homes 1 and 2 is substantial.
Over $828 dollars saved each year can easily pay for
the expense of efficient appliances. Remember, the accuracy
of the final energy use estimate is only as accurate
as the data within the load analysis table
Copy
of clean worksheet
Home
1 - inefficient
|
A
|
B
|
C
|
D
|
E
|
F
|
G
|
H
|
I
|
J
|
K
|
L
|
|
Appliance
|
Qty
|
Volt
|
AC/DC
|
On?
|
Run
W
|
Hrs/d
|
d/wk
|
WHrs/d
|
%
|
Surge
W
|
Ph-L
|
| Incandescent
Lights |
4
|
117
|
AC
|
Y
|
60
|
5.0
|
7
|
1200
|
16.3
|
0
|
N
|
| Refrigerator
RCA 16cu ft |
1
|
12
|
AC
|
Y
|
141
|
10.0
|
7
|
1410
|
19.1
|
1300
|
N
|
| Blender |
1
|
117
|
AC
|
N
|
350
|
0.1
|
2
|
10
|
0.01
|
1050
|
N
|
| Microwave
Oven |
1
|
117
|
AC
|
N
|
900
|
0.3
|
7
|
225
|
3.1
|
1200
|
Y
|
| Phantom
Load - Microwave |
1
|
117
|
AC
|
Y
|
4
|
23.8
|
7
|
95
|
1.3
|
0
|
|
| Food
Processor |
1
|
117
|
AC
|
N
|
400
|
0.1
|
5
|
28.6
|
0.4
|
1200
|
N
|
| Espresso
Maker |
1
|
117
|
AC
|
N
|
1350
|
0.1
|
7
|
135
|
1.8
|
1350
|
N
|
| Coffee
Grinder |
1
|
117
|
AC
|
N
|
150
|
0.1
|
7
|
7.5
|
0.1
|
200
|
N
|
| 21"
Color TV |
1
|
117
|
AC
|
Y
|
125
|
5
|
7
|
625
|
8.5
|
570
|
Y
|
| Phantom
load TV |
1
|
117
|
AC
|
Y
|
20
|
19
|
7
|
380
|
5.2
|
0
|
|
| VCR |
1
|
117
|
AC
|
Y
|
40
|
2.5
|
7
|
100
|
1.4
|
80
|
Y
|
| Phantom
load VCR |
1
|
117
|
AC
|
Y
|
15
|
21.5
|
7
|
322.5
|
4.4
|
0
|
|
| Satellite
TV System |
1
|
117
|
AC
|
Y
|
60
|
2.5
|
7
|
150
|
2
|
1600
|
Y
|
| Phantom
load satellite Sys |
1
|
117
|
AC
|
Y
|
22
|
21.5
|
7
|
473
|
6.4
|
0
|
|
| Stereo
System |
1
|
117
|
AC
|
Y
|
30
|
8
|
7
|
240
|
3.3
|
60
|
Y
|
| Phantom
load stereo |
1
|
117
|
AC
|
Y
|
3
|
16
|
7
|
48
|
0.7
|
0
|
|
| Computer |
1
|
117
|
AC
|
Y
|
45
|
6
|
3
|
115.7
|
1.6
|
135
|
Y
|
| Phantom
load computer |
1
|
117
|
AC
|
Y
|
3
|
21.4
|
7
|
64.3
|
0.9
|
0
|
|
| Computer
Printer |
1
|
117
|
AC
|
N
|
120
|
0.3
|
3
|
12.9
|
0.2
|
360
|
Y
|
| Phantom
load printer |
1
|
117
|
AC
|
Y
|
3
|
23.9
|
7
|
71.7
|
1
|
0
|
|
| Power
Tool |
1
|
117
|
AC
|
N
|
750
|
0.5
|
3
|
160.7
|
2.2
|
2250
|
N
|
| Radio
Telephone (receive) |
1
|
12
|
AC
|
N
|
6
|
24
|
7
|
144
|
2
|
0
|
N
|
| Radio
Telephone (transmit) |
1
|
12
|
AC
|
N
|
20
|
1
|
7
|
20
|
0.3
|
0
|
N
|
| Phone
answering machine |
1
|
117
|
AC
|
N
|
6
|
24
|
7
|
144
|
2
|
0
|
N
|
|
Washing
machine
|
1
|
117
|
AC
|
N
|
800
|
0.5
|
4
|
228.6
|
3.1
|
100
|
Y
|
| Phantom
load - washer timer |
1
|
117
|
AC
|
Y
|
8
|
23.7
|
1
|
27.1
|
0.4
|
0
|
|
| Clothes
dryer (motor only) |
1
|
117
|
AC
|
N
|
500
|
1
|
4
|
285.7
|
3.9
|
1500
|
Y
|
| Phantom
load dryer timer |
1
|
117
|
AC
|
Y
|
8
|
23.4
|
7
|
187.4
|
2.5
|
0
|
|
| Sewing
machine |
1
|
117
|
AC
|
N
|
80
|
2
|
1
|
22.9
|
0.3
|
400
|
N
|
| Vacuum
cleaner |
1
|
117
|
AC
|
N
|
650
|
0.5
|
4
|
185.7
|
2.5
|
1950
|
N
|
| Hair
dryer |
1
|
117
|
AC
|
N
|
1000
|
0.2
|
7
|
200
|
2.7
|
1500
|
N
|
| Ni-Cd
Battery Charger |
1
|
117
|
AC
|
Y
|
4
|
15
|
2
|
17.1
|
0.2
|
25
|
Y
|
| Phantom
load battery charger |
1
|
117
|
AC
|
Y
|
2
|
19.7
|
7
|
39.4
|
0.5
|
0
|
|
|
|
|
Ave
Total daily Watt-Hrs |
7376.8 |
|
|
|
| A |
Type
of appliance |
| B |
Quantity
of appliances |
| C |
Voltage
at which appliance operate |
| D |
Is
supply voltage AC or DC? |
| E |
Does
the appliance spend a lot of time on |
| F |
Run
Watts - How much power does the appliance use when
on. This can be measured or may be displayed on
the manufacturers specification sticker on the appliance |
| G |
How
many hours per day is the appliance used |
| H |
How
many days per week is the appliance used |
| I |
Average
watt-hours per day comsumed by appliance: Calculate:
(B x F x G x H) / 7
|
| J |
Percentage
of total power (for information only) |
| K |
Starting
surge of appliance |
| L |
Phantom
load; any appliance that consumes power even when
it is turned off |
HOME
2 - EFFICIENT
|
A
|
B
|
C
|
D
|
E
|
F
|
G
|
H
|
I
|
J
|
K
|
L
|
|
Appliance
|
Qty
|
Volt
|
AC/DC
|
On?
|
Run
W
|
Hrs/d
|
d/wk
|
WHrs/d
|
%
|
Surge
W
|
Ph-L
|
| Flourescent
Lights |
4
|
117
|
AC
|
Y
|
60
|
5.0
|
7
|
1200
|
16.3
|
0
|
N
|
| SunFrost
16cu ft Fridge |
1
|
12
|
AC
|
Y
|
141
|
10.0
|
7
|
1410
|
19.1
|
1300
|
N
|
| Blender |
1
|
117
|
AC
|
N
|
350
|
0.1
|
2
|
10
|
0.01
|
1050
|
N
|
| Microwave
Oven |
1
|
117
|
AC
|
N
|
900
|
0.3
|
| | 
