Review of Methods Used by the U.S. Department of Energy in Setting Appliance and Equipment Standards (2021) / Chapter Skim
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ANNEX 4A: DETAILED COMMENTS ON THE LIFE-CYCLE COST ANALYSIS FOR RESIDENTIAL DISHWASHERS
ANNEX 4A: DETAILED COMMENTS ON THE LIFE-CYCLE COST ANALYSIS FOR RESIDENTIAL DISHWASHERS
Pages 84-97
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From page 84... ...
2014. Technical Support Document: Energy Efficiency Program for Consumer Products and Commercial and Industrial Equipment: Residential Dishwashers.
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From page 85... ...
. Factor to account Multiply the Manufacturers Unitless DOE derives cost BLS Producer Price Index • The cost declines of baseline costs are irrelevant for the for Manufacturer cost of year 2013 by this factor declining annual rates (PPI)
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From page 86... ...
• Consider reporting to 3 or 4 decimal places for this factor, given that sales prices are reported with the precision of dollars and cents. Retailer Markup for Multiply this factor by the Cost Unitless Use the reported Sales 2011 Annual Retail Trade • Estimate the markup for Electronics and Appliance Baseline of Goods Sold (CGS)
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From page 87... ...
Sales Taxes Add to the retailer price to % Find the specific rate obtain the final purchasing cost according to the state to consumers Varies by state where the household is or groups of located states Average Sales This value is presented in the % DOE takes the Average Sales Tax Clearinghouse • Account for interstate variability. Take the population Taxes (Population TSD but not used for the LCC Sales Tax Rate for 9 http://thestc.com/STrates.st weighted average sales tax in a state (city tax + county Weighted National 7.11 Census Divisions plus the m tax + state tax)
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From page 88... ...
NOTE: ARTS = annual retail trade survey; BLS = Bureau of Labor Statistics; CGS = cost of goods sold; EL = efficiency level; GDP = gross domestic product; GM = gross margin; LCC = life-cycle cost; RECS = Residential Energy Consumption Survey. a https://www.census.gov/data/tables/2011/econ/arts/annual-report.html.
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From page 89... ...
. Review • This number would not play any role in the cycles per year translate the estimate of a survey of 26,000 of Survey Data to Support calculation of energy consumption per cycle if the annual energy 215 households conducted by Revisions to DOE's engineering analysis presented this value.
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From page 90... ...
102 • DOE should base the analysis on publicly available sources whenever possible and if needed adjust assumptions. Duration of the This value is necessary to Hours The caption of Tables 7.2.3 Section 5.5.2.3 of the Engineering Analysis states average estimate the number of and 7.2.4 imply DOE that DOE expects manufacturers of EL2 to increase dishwashing cycle Standby hours per year 1 assumes the average the duration of the cycle to compensate for decreased dishwashing cycle for all water use and maintain washing performance with Standard Dishwashers and improved efficiency.
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From page 91... ...
In EL2: 0.5 particular, it would be useful to explain the great discrepancy in standby power use between the Standard and the Compact product classes. Standby hours per This value is necessary to Hours/yr DOE estimates the number DOE should characterize the Standby hours per year year estimate the Annual of Standby hours by based on the characterization of the cycles for each Standby Energy Use 8551 assuming there are 8766 EL.
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From page 92... ...
Per-cycle Water This estimate is necessary kWh/cycle Assume the use of an Per-cycle water use • The engineering analysis presents an estimate of Heating Energy to calculate the operating electric water heater with (gallons/cycle) from the Annual Water Consumption and Per-cycle Water Consumption costs of a dishwasher Standard: 100% efficiency and engineering analysis.
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From page 93... ...
105 Annual Water Use Intermediate calculation Gal/yr Multiply per-cycle Water Per-cycle Water Consumption Consumption by Number from Engineering Analysis and Standard; of Cycles in a year Number of cycles from Little BL:1075 (2001) EL1:914 EL2:753 EL3:667 EL4:477 Compact; BL: 753 EL1: 667 EL2: 430 Annual Energy Necessary to estimate the kWh/yr for electric The caption of Tables 7.3.1 • The efficiency of water heaters and water Consumption for cost of water heating for water heaters and 7.3.2 indicates that the temperature rise requirements varies water heating when the baseline and ELs as a calculation assumes water significantly across geographical regions and Electric, Gas or Oil function of prices of MMBtu/yr for gas heater efficiencies of 98% seasons.
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From page 94... ...
Electricity prices in Annual average 2013$/kWh Estimate annual average EIA Form 861 which contains, DOE should use the monthly average electricity the analysis year residential electricity residential electricity prices for every utility serving final prices to residential customers by state calculated by price in 2012 A different value for each of 27 RECS consumers, annual electricity EIAa. Multiply monthly electricity prices in each for each of the 27 regions by weighting the sales, revenues from electricity state by monthly electricity consumption in each state RECS regions annual residential sales, number of customers in to obtain state-specific, monthly electricity costs.
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From page 95... ...
Then use monthly prices by state/region to households estimate monthly energy costs. Oil prices in the Annual average 2013$/MMBtu Estimate average price in EIA's 2012 State Energy DOE should use monthly residential prices of heating year of analysis residential oil prices in A different value the RECS region by Consumption Price and oil by state provided by EIAd to estimate monthly 2012 for each of the 27 weighting each state in the Expenditures Estimates energy costs for households with LPG water heaters.
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From page 96... ...
Product lifetime Necessary to estimate Years DOE adjusts RECS data to • RECS data on the age of • DOE assumes the same lifetime for products of operating costs for the reflect use outside of the appliance (age response different energy efficiency levels. This entire lifetime of the Weibul primary residence based on is in the form of bins assumption may be unrealistic in light of the fact product distribution with AHS data and also takes comprising several years)
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From page 97... ...
Rate of return on stocks from Standard and Poor's S&P 500. NOTES: BL = baseline level; EL = efficiency level; kWh = kilowatt-hour; LCC = life-cycle cost; LPG = liquefied petroleum gas; mmBtu = million British thermal units; PBP = payback period; RECS = Residential Energy Consumption Survey; SCF = standard cubic feet.
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