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Federal Register / Vol. 86, No. 167 / Wednesday, September 1, 2021 / Proposed Rules
Section 3.10 of Appendix J2 section 3.6 in the proposed new Appendix J is titled Energy consumption for the purpose of determining the cycle selections to be included in the energy test cycle and specifies the following:
Establishing the test conditions and setting the cycle selections 3.10.1;
using the maximum test load size 3.10.2; using the maximum water fill level available 3.10.3; including only the active washing mode 3.10.4; and calculating total energy consumption using a defined equation 3.10.5. DOE
is proposing to simplify section 3.6 in the proposed new Appendix J by condensing the specifications of sections 3.10.1 through 3.10.4 in Appendix J2 into a single statement in section 3.6.1 of the proposed new Appendix J to use the cycle settings as described in section 3.2 of the proposed new Appendix J. Current section 3.10.5
of Appendix J2 would be included in the proposed new Appendix J as section 3.6.2.
Sections 3 and 4 of Appendix J2
assign various different subscripts to each symbol definition to denote load size and wash/rinse temperature selection, among other attributes.
Currently, Appendix J2 uses the subscript x to denote the maximum load size and the subscript m to denote the Extra Hot/Cold temperature selection. In the proposed new Appendix J, DOE proposes to use new subscripts to represent the large load size L and the small load size S.
Because the maximum load size would no longer apply in the proposed new Appendix J, DOE is proposing to update the subscript for Extra-Hot/Cold temperature selection from m to x since x is more intuitive in representing Extra. These changes would apply to sections 3.3, 3.4, 3.6 and 4 in the proposed new Appendix J.
Additionally, throughout section 4 of Appendix J2, the symbol F is used to refer to load usage factors. For greater clarity in the proposed new Appendix J, DOE is proposing to use the symbol LUF throughout section 4 to represent the load usage factors, rather than the symbol F.
Section 4.1.7 of Appendix J2 specifies calculating Total per-cycle energy consumption when electrically heated water is used, assigned as symbol ETE, as the sum of machine electrical energy and hot water heating energy.
ETE was originally defined in section 4.6
of Appendix J1977 and at the time represented the total measured energy consumption, since the drying energy DE and ETLP were not yet included as part of the clothes washer test procedure. Currently, however, the total
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measured energy consumption would be more accurately represented by the sum of HET, MET, DE, and ETLP. Because the calculation of ETE as an intermediate step is now obsolete, DOE is proposing to not include the definition of ETE from section 4.1.7 of the proposed new Appendix J, as well as all edit crossreferences to ETE within sections 4.5
and 4.6 of the proposed new Appendix J and 10 CFR 430.23j1iA as proposed. In these instances, DOE is proposing to replace ETE with its component parts: HET and MET.
Section 4.2 of Appendix J2 provides the calculation of water consumption and is structured with multiple subsections. Sections 4.2.1 through 4.2.5
of Appendix J2 provide for the calculation of total water consumption for each load size within each wash/
rinse temperature selection by summing the measured values of hot water and cold water: Extra Hot/Cold 4.2.1; Hot/
Cold 4.2.2; Warm/Cold 4.2.3; Warm/
Warm 4.2.4; and Cold/Cold 4.2.5. In sections 4.2.6 through 4.2.10 of Appendix J2, the total weighted water consumption for each wash/rinse temperature selection is calculated by combining the water consumption values for each load size as calculated in 4.2.1 through 4.2.5 using the LUFs. In section 4.2.11 of Appendix J2, the total weighted water consumption for all wash cycles is calculated by combining the values calculated in sections 4.2.6
through 4.2.10 representing each wash/
rinse temperature using the TUFs. DOE
notes that this order of calculations which combines the measured values from the individual cycles first using LUFs, then combines the resulting values using TUFs is the reverse order used for the machine electrical and hot water heating energy calculations in section 4.1 of Appendix J2 which combines the measured values from the individual cycles first using TUFs, then combines the resulting values using LUFs. In the proposed new Appendix J, DOE is proposing to organize section 4.2 to simplify the calculations and to provide consistency between the water consumption calculations and the energy calculations i.e., to combine the measured values from the individual cycles first using TUFs, then combine the resulting values using LUFs.
Accordingly, section 4.2.1 of the proposed new Appendix J would define the per-cycle total water consumption for each large load size tested summing the hot and cold water consumption for each load size and temperature setting, and 4.2.2 would similarly define the per-cycle total water consumption for each large small size tested. Section
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4.2.3 of the proposed new Appendix J
would provide for the calculation of the per-cycle total water consumption for all load sizes, using the TUFs to calculate the weighted average of all temperature settings for each load size.
Finally, section 4.2.4 of the proposed new Appendix J would calculate the total weighted per-cycle water consumption, using the LUFs to calculate the weighted average over the two load sizes.
DOE requests comment on its proposed structure of the proposed new Appendix J to simplify and improve readability as compared to Appendix J2.
8. Proposed Deletions and Simplifications DOE proposes to remove Appendix J1
to subpart B of 10 CFR part 430 along with all references to Appendix J1 in 10
CFR parts 429, 430, and 431. Appendix J1 applied only to RCWs manufactured before March 7, 2015 and CCWs manufactured before January 1, 2018
and is therefore not applicable to models manufactured on or after those dates. Use of Appendix J2 to subpart B
of 10 CFR part 430 is currently required for any representations of energy or water consumption of both RCWs and CCWs, including demonstrating compliance with the currently applicable energy conservation standards. As discussed, DOE proposes to maintain the current naming of Appendix J2, and to establish a new test procedure at Appendix J, which would be used for the evaluation and issuance of updated efficiency standards, and for determining compliance with those standards.
DOE requests comment on its proposal to remove Appendix J1 to subpart B of 10 CFR part 430 along with all references to Appendix J1 in 10 CFR
parts 429, 430, and 431.
Given DOEs proposal to update the energy and water metrics in the proposed new Appendix J, as described in section III.E of this document, DOE
proposes to include references to the proposed new metrics EER, AEER, and WER in place of references to the WF, IWF, MEF, and IMEF metrics, as appropriate, in the proposed new Appendix J. Given that the WF metric is no longer the basis for energy conservation standards for either RCWs or CCWs, DOE proposes to remove the calculation of WF in section 4.2.12 of Appendix J2, as well as any references to WF in 10 CFR parts 429, 430, and 431. Similarly, given that MEF is no longer the basis for energy conservation standards for RCWs, DOE proposes to remove references to MEF from 10 CFR
429.20 and 10 CFR 430.23.

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