8

- F

- i APPENDIX 8

- F. LCC AND PBP RESULTS USING ALTERNATIVE BA SE CASE EFFICIENCY DISTRIBUT ION

TABLE OF CO NTENTS

8

- F.1 INTRODUCTION

................................ ................................ ................................ .. 8

- F

- 1 8

- F.2 LCC AND PBP RESULTS USING ALTERNATIVE BA SE CASE EFFICIENCY DISTRIBUT ION

................................ ................................ ............ 8

- F

- 2

LIST OF TABLES

Table 8

- F.1.1 Standard

- Sized Dishwashers: Alternative Base Case Efficiency Market Shares for 2013 and 2018

................................ ................................ ........... 8

- F

- 2 Table 8

- F.2.1 Standard

- Sized Dishwashers: Rebuttable Payback Periods

........................ 8

- F

- 2 Table 8

- F.2.2 Standard

- Sized Dishwashers: Rebuttable Payback Periods

........................ 8

- F

- 3

LIST OF FIGURE

Figure 5

- P.1.1 Historic and Projected Base Case Trend in Standard Dishwasher Average Annual Energy Use

................................ ................................ ...... 8

- F

- 18

- F

- 1 APPENDIX 8

- F. LCC AND PBP RESULTS USING ALTERNATIVE BA SE CASE
EFFICIENCY DISTRIBUT ION

8

- F.1 INTRODUCTION
As an alternative to the base case efficiency distribution described in chapter 8, for standard

- sized dishwashers DOE used an approach based on data from AHAM for 1994 through 2010. The AHAM data reflect measurements using the DOE test procedure, which was modified in 2004. The main change affecting energy use was the inclusion of standby po wer. Therefore, DOE added estimated average standby energy use (as given in the data from AHAM for 2008

- 2010 cited below) to the data for 1994

- 2003 to create a consistent time

- series. DOE fit an exponential curve to the adjusted 1994

- 2010 series to estimat e averag e kWh per year in 2013 and 2018 (see figure below). DOE assumed that the trend would level off at the max

- tech efficiency level.

Figure 8

- F.1.1 Historic and Projected Base Case Trend in Standard Dishwasher Average Annual Energy Use 150 200 250 300 350 400 450

1990 2000 2010 2020 2030 2040 2050Annual Energy Use (kWh/year) AHAM Data
Projected Values
Expon. (AHAM Data)8

- F

- 2 To estimate the base

- case efficiency distribution for 2013 and 2018 , DOE relied on data submitted by AHAM for the current rulemaking. These data provide shares of shipments by efficiency level for 2002

– 2005 and 2008

– 2010. The efficiency distributions for 2 002

- 2005 were provided by AHAM in a data submittal for an earlier standards rulemaking. a The efficiency distributions for 2008

- 2010 were provided by AHAM in its more recent data submittal as described in Chapter 5. To predict the market shares for each e fficiency level in 2013 and 2018, DOE considered the shares and market trends present in the AHAM data and assumed these trends would continue in a manner consistent with the decline in average energy use. The projected (2013 and 2018) market shares are sh own in the table below.

Table 8

- F.1.1 Standard

- Sized Dishwashers: Alternative Base Case Efficiency Market Shares for 2013 and 2018
Efficiency Level Annual Energy Use (kWh) Water Use (gal/cycle) 2013 Market Share 2018 Market Share Baseline 355 6.50 3.8% 3.8%
1 324 5.80 43.2% 15.1%
2 307 5.00 28.0% 32.7%
3 295 4.25 16.4% 18.5%
4 234 3.80 8.6% 14.7%
5 180 1.60 0.0% 15.1%

8

- F.2 LCC AND PBP RESULTS USING ALTERNATIVE BA SE CASE
EFFICIENCY DISTRIBUT ION
Tables 8F.2.1 and 8F.2.2 present the rebuttable PBPs for standard

- sized and compact dishwashers, respectively.

Table 8

- F.2.1 Standard

- Sized Dishwashers: Rebuttable Payback Periods

Efficiency Level AEU kWh/year Water Use gal/cycle Rebuttable PBP
years
Baseline 355 6.50

-
1 324 5.80 5.26

2 307 5.00 5.40

3 295 4.25 8.85

4 234 3.80 5.57

5 180 1.60 4.00

a Association of Home Appliance Manufacturers. AHAM Data on Dishwashers for Efficiency Standards Rulemaking, September 7, 2006. Letter to Building Technologies Program, U.S. Department of Energy.8

- F

- 3 Table 8

- F.2.2 Standard

- Sized Dishwashers: Rebuttable Payback Periods

Efficiency Level AEU kWh/year Water Use gal/cycle Rebuttable PBP
years
Baseline 260 4.50

-
1 222 3.50 0.23

2 154 2.10 1.02