In the simple inputs level, users can specify the number of
freezers in their house, from zero to two units. Each freezer specified has
default characteristics (appliance type, size and year) assigned depending on
whether it is the first or second freezer in the house (Table 17). In the
detailed inputs level, users can alter these default characteristics.
Table 16. Shipment Weighted Energy
Factors for Freezers
|
Year
|
General
|
Upright Design
|
Chest Freezers
|
|
Automatic Defrost
|
Manual Defrost
|
|
1972
|
7.29
|
5.23
|
7.65
|
8.78
|
|
1973
|
7.72
|
5.43
|
7.93
|
9.27
|
|
1974
|
8.15
|
5.63
|
8.21
|
9.76
|
|
1975
|
8.58
|
5.83
|
8.49
|
10.25
|
|
1976
|
9.01
|
6.03
|
8.76
|
10.74
|
|
1977
|
9.44
|
6.23
|
9.03
|
11.23
|
|
1978
|
9.92
|
6.41
|
9.31
|
11.74
|
|
1979
|
10.39
|
6.95
|
9.84
|
11.77
|
|
1980
|
10.85
|
7.49
|
10.37
|
11.8
|
|
1981
|
11.13
|
8.03
|
10.89
|
11.82
|
|
1982
|
11.28
|
8.23
|
11.38
|
11.87
|
|
1983
|
11.36
|
8.43
|
11.44
|
11.91
|
|
1984
|
11.6
|
8.58
|
11.51
|
12.31
|
|
1985
|
11.55
|
9.5
|
11.56
|
12.04
|
|
1986
|
12.07
|
9.44
|
12.07
|
12.84
|
|
1987
|
12.93
|
9.57
|
12.6
|
14.41
|
|
1988
|
12.91
|
9.31
|
12.61
|
14.46
|
|
1989
|
13.89
|
9.47
|
13.86
|
15.48
|
|
1990
|
14.19
|
10.41
|
14.15
|
15.67
|
|
1991
|
14.17
|
10.43
|
13.95
|
15.92
|
|
1992
|
13.95
|
10.38
|
13.73
|
15.63
|
|
1993
|
17.38
|
13.65
|
17.3
|
19.43
|
|
1994
|
16.91
|
13.14
|
17.02
|
18.89
|
|
1995
|
16.57
|
13.16
|
16.95
|
18.28
|
|
1996
|
16.56
|
13.11
|
17.09
|
18.18
|
|
1997
|
16.41
|
12.99
|
16.94
|
18.02
|
|
1998
|
16.3
|
12.90
|
16.82
|
17.89
|
|
1999
|
16.16
|
12.79
|
16.68
|
17.74
|
|
2000
|
15.93
|
12.61
|
16.44
|
17.49
|
|
2001
|
17.38
|
13.76
|
17.94
|
19.08
|
|
2002
|
17.83
|
14.12
|
18.40
|
19.57
|
|
2003
|
17.06
|
13.51
|
17.61
|
18.73
|
Notes on Freezer Energy Factors:
1. Energy Factor has units of (cubic feet•day/kWh),
where cubic feet is adjusted volume.
2. Source: (AHAM
1996) (AHAM 2003) - AHAM changed the reporting of freezer efficiencies after
1996. Annual data is available for the “General” category. Data for the other
freezer types for years subsequent to 1996 was derived from the “General”
freezer efficiency by scaling the efficiency for a particular type of freezer
proportional to the annual change in efficiencies in the “General” freezer
category.
3. Data has been
held at 2003 levels for subsequent years.
Table 17. User Inputs to the Freezer
Analysis
|
Variable Name
|
Range of
possible Values
|
Default Value
|
unit
|
|
Type
|
General
Upright, Automatic Defrost
Upright, Manual Defrost
Chest Freezer
|
General
|
|
|
Year
|
1972-2011
|
1990 (1st
unit)
1983 (2nd
unit)
|
year
|
|
Size
|
Small (13-15 cu ft)
Medium (16-18 cu ft)
Large (19-21 cu ft)
Extra-Large (22+ cu ft)
|
Medium (1st
unit)
Small (2nd
unit)
|
cu. feet
|
| 