Appendix CC1 to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Portable Air Conditioners

Appendix CC1 to Subpart B of Part 430—XXX

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430—Uniform Test Method for Measuring the Energy Consumption of Portable Air Conditioners

Note:

Manufacturers must use the results of testing under this appendix CC1 to determine compliance with any standards that amend the portable air conditioners standard at § 430.32(cc) with which compliance is required on January 10, 2025 and that use the Annualized Energy Efficiency Ratio (AEER) metric. Any representation related to energy also must be made in accordance with the appendix that applies (i.e., appendix CC to this subpart or this appendix CC1). Manufacturers may also use this appendix CC1 to certify compliance with any amended standards before the compliance date for those standards.

0. Incorporation by Reference

DOE incorporated by reference in § 430.3, the entire standard for AHAM PAC–1–2022, ANSI/AMCA 210–99, ASHRAE 37–2009, ASHRAE 41.1–1986, ASHRAE 41.6–1994, and IEC 62301; however, only enumerated provisions of AHAM PAC–1–2022, ANSI/AMCA 210–99, ASHRAE 37–2009, and IEC 62301 are applicable to this appendix CC1, as follows. Treat “should” in IEC 62301 as mandatory. When there is a conflict, the language of this appendix takes precedence over those documents.

0.1 AHAM PAC–1–2022

(a) Section 4 “Definitions,” as specified in section 2 of this appendix;

(b) Section 7 “Test Setup,” as specified in sections 3 and 4 of this appendix;

(c) Section 8 “Test Conduct,” as specified in section 4 of this appendix;

(d) Section 8.1 “Cooling Mode,” as specified in sections 5.1 and 5.3 of this appendix;

(e) Section 9 “Calculation of Derived Results from Test Measurements,” as specified in section 5 of this appendix;

(f) Section 9.1 “Duct Heat Transfer,” as specified in section 5.1 of this appendix;

(g) Section 9.2 “Infiltration Air Heat Transfer,” as specified in section 5.1 of this appendix.

0.2 ANSI/AMCA 210–99 (“ANSI/AMCA 210”)

(a) Figure 12, “Outlet chamber Setup—Multiple Nozzles in Chamber,” as specified in section 4 of this appendix;

(b) Figure 12 Notes, as specified in section 4 of this appendix.

0.3 ASHRAE 37–2009

(a) Section 5.1 “Temperature Measuring Instruments,” as specified in section 3 of this appendix;

(b) Section 5.3 “Air Differential Pressure and Airflow Measurements,” as specified in section 3 of this appendix;

(c) Section 5.4 “Electrical Instruments,” as specified in section 4 of this appendix;

(d) Section 6.2 “Nozzle Airflow Measuring Apparatus,” as specified in section 4 of this appendix;

(e) Section 6.3 “Nozzles,” as specified in section 4 of this appendix;

(f) Section 7.3 “Indoor and Outdoor Air Enthalpy Methods,” as specified in section 4 of this appendix;

(g) Section 7.7 “Airflow Rate Measurement,” as specified in section 4 of this appendix;

(h) Section 8.7 “Test Procedure for Cooling Capacity Tests,” as specified in section 4 of this appendix;

(i) Section 9 “Data to be Recorded,” as specified in section 4 of this appendix;

(j) Section 10 “Test Results,” as specified in section 4 of this appendix;

(k) Section 11.1 “Symbols Used In Equations,” as specified in section 4 of this appendix.

0.4 IEC 62301

(a) Paragraph 4.2 “Test room” as specified in section 3 of this appendix;

(b) Paragraph 4.3.2 “Supply voltage waveform,” as specified in section 3 of this appendix;

(c) Paragraph 4.4 “Power measuring instruments,” as specified in section 3 of this appendix;

(d) Paragraph 5.1, “General,” Note 1 as specified in section 4 of this appendix;

(e) Paragraph 5.2 “Preparation of product,” as specified in section 3 of this appendix;

(f) Paragraph 5.3.2 “Sampling method,” as specified in section 4 of this appendix;

(g) Annex D, “Determination of Uncertainty of Measurement,” as specified in section 3 of this appendix.

1. Scope

Establishes test requirements to measure the energy performance of single-duct and dual-duct, and single-speed and variable-speed portable air conditioners in accordance with AHAM PAC–1–2022, unless otherwise specified.

2. Definitions

Definitions for industry standards, terms, modes, calculations, etc. are in accordance with AHAM PAC–1–2022, section 4, with the following added definition:

Annualized Energy Efficiency Ratio means the energy efficiency of a portable air conditioner as measured in accordance with this test procedure as the total annual cooling delivered divided by the total annual energy consumption in per watt-hours (Btu/Wh) and determined in section 5.4.

3. Test Apparatus and General Instructions

Follow requirements and instructions for test conduct and test setup in accordance with AHAM PAC–1–2022, section 7, excluding section 7.1.3, including references to ASHRAE 37–2009, sections 5.1 and 5.3, and IEC 62301 sections 4.2, 4.3.2, 4.4, and 5.2, and Annex D. If the portable air conditioner has network functions, disable all network functions throughout testing if possible. If an end-user cannot disable a network function or the product's user manual does not provide instruction for disabling a network function, test the unit with that network function in the factory default configuration for the duration of the test.

3.1 Duct temperature measurements. Install any insulation and sealing provided by the manufacturer. For a dual-duct or single-duct unit, adhere four thermocouples per duct, spaced along the entire length equally, to the outer surface of the duct. Measure the surface temperatures of each duct. For a combined-duct unit, adhere sixteen thermocouples to the outer surface of the duct, spaced evenly around the circumference (four thermocouples, each 90 degrees apart, radially) and down the entire length of the duct (four sets of four thermocouples, evenly spaced along the entire length of the duct), ensuring that the thermocouples are spaced along the entire length equally, on the surface of the combined duct. Place at least one thermocouple preferably adjacent to, but otherwise as close as possible to, the condenser inlet aperture and at least one thermocouple on the duct surface preferably adjacent to, but otherwise as close as possible to, the condenser outlet aperture. Measure the surface temperature of the combined duct at each thermocouple. Temperature measurements must have an error no greater than ±0.5 °F over the range being measured.

4. Test Measurement

Follow requirements for test conduct in active and inactive modes of operation in accordance with AHAM PAC–1–2022, section 8, except section 8.1.b, including references to sections 5.4, 6.2, 6.3, 7.3, 7.7, 8.7, 9, 10, and 11 of ASHRAE 37–2009, referring to Figure 12 and Figure 12 Notes of ANSI/AMCA 210 to determine placement of static pressure taps, and including references to ASHRAE 41.1–1986 and ASHRAE 41.6–1994. When conducting cooling mode testing for a variable-speed dual-duct portable air conditioner, use test configurations 1C and 1E in Table 2 of AHAM PAC–1–2022. Conduct the first test in accordance with ambient conditions for test configuration 1C in Table 2 of AHAM PAC–1–2022, and measure cooling capacity (Capacity_{DD_95_Full}) and input power (P_{DD_95_Full}). Conduct the second test in accordance with the ambient conditions for test configuration 1E in Table 2 of AHAM PAC–1–2022, with the compressor speed set to low for the duration of cooling mode testing (in accordance with the manufacturer instructions as described in section 7.1.10), and measure cooling capacity (Capacity_{DD_83_Low}) and input power (P_{DD_83_Low}). When conducting standby power testing using the sampling method described in section 5.3.2 of IEC 62301, if the standby mode is cyclic and irregular or unstable, collect 10 cycles worth of data. As discussed in Paragraph 5.1, Note 1 of IEC 62301, allow sufficient time for the unit to reach the lowest power state before proceeding with the test measurement.

5. Calculation of Derived Results From Test Measurements

Perform calculations from test measurements to determine Seasonally Adjusted Cooling Capacity (SACC) and Annualized Energy Efficiency Ratio (AEER) in accordance with AHAM PAC–1–2022, section 9 unless otherwise specified in this section.

5.1 Adjusted Cooling Capacity. Calculate the adjusted cooling capacities at the 95 °F and 83 °F operating conditions specified below of the sample unit, in Btu/h, according to the following equations.

For a single-duct single-speed unit:

ACC₉₅ = Capacity_SD −Q_{duct_SD} − Q_{infiltration_95}

ACC₈₃ = 0.6000 × (Capacity_SD − Q_{duct_SD} − Q_{infiltration_95})

For a single-duct variable-speed unit:

ACC₉₅ = Capacity_{SD_Full} −Q_{duct_SD_Full} − Q_{infiltration_95}

ACC₈₃ = Capacity_{SD_Low} −Q_{duct_SD_Low} − Q_{infiltration_83_Low}

For a dual-duct single-speed unit:

ACC₉₅ = Capacity_{DD_95} −Q_{duct_DD_95} − Q_{infiltration_95}

ACC₈₃ = 0.5363 × (Capacity_{DD_83} − Q_{duct_DD_83} − Q_{infiltration_83)}

For a dual-duct variable-speed unit:

ACC₉₅ = Capacity_{DD_95_Full} −Q_{duct_DD_95_Full} − Q_{infiltration_95}

ACC₈₃ = Capacity_{DD__Low} −Q_{duct_DD_83_Low} − Q_{infiltration_83_Low}

Where:

ACC₉₅ and ACC₈₃ = adjusted cooling capacity of the sample unit, in Btu/h, calculated from testing at:

For a single-duct single-speed unit, test configuration 2A in Table 2 of AHAM PAC–1–2022.

For a single-duct variable-speed unit, test configurations 2B and 2C in Table 2 of AHAM PAC–1–2022.

For a dual-duct single-speed unit, test configurations 1A and 1B in Table 2 of AHAM PAC–1–2022.

For a dual-duct variable-speed unit: test configurations 1C and 1E in Table 2 of AHAM PAC–1–2022.

Capacity_SD, Capacity_{SD_Full}, Capacity_{SD_Low}, Capacity_{DD_95}, Capacity_{DD_83}, Capacity_{DD_95_Full}, and Capacity_{DD_83_Low} = cooling capacity, in Btu/h, measured in testing at test configuration 2A, 2B, 2C, 1A, 1B, 1C, and 1E of Table 2 in section 8.1 of AHAM PAC–1–2022, respectively.

Q_{duct_SD}, Q_{duct_SD_Full}, Q_{duct_SD_Low,} Q_{duct_DD_95}, Q_{duct_DD_83}, Q_{duct_DD_95_Full}, and Q_{duct_DD_83_Low} = duct heat transfer while operating in cooling mode for each duct configuration, compressor speed (where applicable) and temperature condition (where applicable), calculated in section 9.1 of AHAM PAC–1–2022, in Btu/h.

Q_{infiltration_95}, Q_{infiltration_83}, and Q_{infiltration_83_Low} = total infiltration air heat transfer in cooling mode, in Btu/h, for each of the following compressor speed and duct configuration combinations:

For a single-duct single-speed unit, use Q_{infiltration_95} as calculated for a single-duct single-speed unit in section 9.2 of AHAM PAC–1–2022.

For a single-duct variable-speed unit, use Q_{infiltration_95} and Q_{infiltration_83_Low} as calculated for a single-duct variable-speed unit in section 9.2 of AHAM PAC–1–2022.

For a dual-duct single-speed unit, use Q_{infiltration_95} and Q_{infiltration_83} as calculated for a dual-duct single-speed unit in section 9.2 of AHAM PAC–1–2022.

For a dual-duct variable-speed unit, use Q_{infiltration_95} and Q_{infiltration_83_Low} as calculated for a dual-duct variable-speed unit in section 9.2 of AHAM PAC–1–2022.

0.6000 and 0.5363 = empirically-derived load-based capacity adjustment factor for a single-duct and dual-duct single-speed unit, respectively, when operating at test conditions 2A and 1B.

5.2 Seasonally Adjusted Cooling Capacity. Calculate the seasonally adjusted cooling capacity for the sample unit, SACC, in Btu/h, according to:

SACC = ACC₉₅ × 0.144 + ACC₈₃ × 0.856

Where:

ACC₉₅ and ACC₈₃ = adjusted cooling capacities at the 95 °F and 83 °F outdoor temperature conditions, respectively, in Btu/h, calculated in section 5.1 of this appendix.

0.144 = empirically-derived weighting factor for ACC₉₅.

0.856 = empirically-derived weighting factor for ACC₈₃.

5.3 Annual Energy Consumption. Calculate the annual energy consumption in each operating mode, AECm, in kilowatt-hours per year (kWh/year). Use the following annual hours of operation for each mode:

Table 1—Annual Operating Hours

Operating mode	Annual operating hours
Cooling Mode Test Configurations 1A, 1C, 2A (95), 2B	164
Cooling Mode Test Configurations 1B, 2A (83)	586
Cooling Mode Test Configuration 1E, 2C	977
Off-Cycle, Single-Speed	391
Off-Cycle, Variable-Speed	0
Total Cooling and Off-cycle Mode	1,141
Inactive or Off Mode	1,844

Calculate total annual energy consumption in all modes according to the following equations:

AEC_ia/om = P_ia/om × t_ia/om × k

For a single-duct single-speed unit:

AEC₉₅ = P_{SD_95} × t_{SD_95} × k

For a single-duct variable-speed unit:

AEC₉₅ = P_{SD_Full} × t_{SD_Full} × k

AEC₈₃ = P_{SD_Low} × t_{SD_Low} × k

For a dual-duct single-speed unit:

AEC₉₅ = P_{DD_95} × t_{DD_95} × k

For a dual-duct variable-speed unit:

AEC₉₅ = P_{DD_95_Full} × t_{DD_95_Full} × k

AEC₈₃ = P_{DD_83_Low} × t_{DD_83_Low} × k

Where:

AEC₉₅ and AEC₈₃ = total annual energy consumption attributed to all modes representative of either the 95 °F and 83 °F operating condition, respectively, in kWh/year.

P_m = average power in each mode, in watts, as determined in sections 4.1.1 and 4.1.2.

t_m = number of annual operating time in each mode, in hours.

k = 0.001 kWh/Wh conversion factor from watt-hours to kilowatt-hours.

0.82 = empirically-derived factor representing efficiency losses due to compressor cycling outside of fan operation for single-duct units

0.77 = empirically-derived factor representing efficiency losses due to compressor cycling outside of fan operation for dual-duct units

m represents the operating mode:

—“DD_95” and “DD_83” correspond to cooling mode in Test Configurations 1A and 1B in Table 2 of AHAM PAC–1–2022, respectively, for dual-duct single-speed units,

—“DD_95_Full”, “DD_83_Low” correspond to cooling mode in Test Configurations 1C and 1E in Table 2 of AHAM PAC–1–2022, respectively, for dual-duct variable-speed units,

—“SD_95” corresponds to cooling mode in Test Configuration 2A in Table 2 of AHAM PAC–1–2022 for single-duct single-speed units, for use when calculating AEC at the 95 °F outdoor temperature condition,

—“SD_83” corresponds to cooling mode in Test Configuration 2A in Table 2 of AHAM PAC–1–2022 for single-duct single-speed units, for use when calculating AEC at the 83 °F outdoor temperature condition,

—“SD_Full” and “SD_Low” correspond to cooling mode in Test Configurations 2B and 2C in Table 2 of AHAM PAC–1–2022, respectively, for single-duct variable-speed units,

—“oc” corresponds to off-cycle,

—“ia/om” corresponds to inactive or off mode,

5.4 Annualized Cooling and Energy Ratio. Calculate the annualized energy efficiency ratio, AEER, in Btu/Wh, according to the following equation:

Where:

AEER = the annualized energy efficiency ratio of the sample unit in Btu/Wh.

ACC₉₅ and ACC₈₃ = adjusted cooling capacity at the 95 °F and 83 °F outdoor temperature conditions, respectively, calculated in section 5.1 of this appendix.

AEC₉₅, AEC₈₃, AEC_oc, and AEC_ia/om = total annual energy consumption attributed to all modes representative the 95 °F operating condition, the 83 °F operating condition, off-cycle mode, and inactive or off mode respectively, in kWh/year, calculated in section 5.3 of this appendix.

t_{cm_95} = number of annual hours spent in cooling mode at the 95 °F operating condition, t_{DD_95} for dual-duct single-speed units, t_{DD_95_Full} for dual-duct variable-speed units, t_{SD_95} for single-duct single-speed units, or t_{SD_Full} for single-duct variable-speed units, defined in section 5.3 of this appendix.

164 = number of annual hours spent in cooling mode at the 95 °F operating condition, as shown in Table III.2

977 = number of annual hours spent in cooling mode and off-cycle mode at the 83 °F operating condition, defined in section 5.3 of this appendix. 0.001 = kWh/Wh conversion factor for watt-hours to kilowatt-hours.

[88 FR 31136, May 15, 2023

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