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美国能效六级与欧盟能效六级对比差异说明

作者:www.itxpower.net              2015年04月14日          网站:www.itxpower.net

   美国能效六级与欧盟能效六级对比差异说明 欧盟CoC V5六级能效与美国DoE VI能源之星六级Energy Star VI能效虽然都是六级能效但是还是有很多的标准各自不同.下面我们来对比一下.

   首先我们来看看原文的美国DoE VI能源之星六级Energy Star VI能效相关要求和标准:

External Power Supplies

External power supplies (EPS) convert household electric current into direct current or lower-voltage alternating current to operate a consumer product such as a laptop computer or smart phone. There are hundreds of product types that use an EPS and over 300 million EPSs are shipped each year. Energy conservation standards have been in place for external power supplies since 2007.

The standards implemented in 2007 will save approximately 3.8 quads of energy and result in approximately $42.4 billion in energy bill savings for products shipped from 2008-2032. The standard will avoid about 198.5 million metric tons of carbon dioxide emissions, equivalent to the annual greenhouse gas emissions of about 39 million automobiles.

The standards implemented in 2014 will save consumers up to an additional $3.8 billion and cut emissions by nearly another 47 million metric tons of carbon dioxide over 30 years, equivalent to the annual electricity use of 6.5 million homes.

Standards for External Power Supplies

The following content summarizes the energy conservation standards for external power supplies. The text is not an official reproduction of the Code of Federal Regulations and should not be used for legal research or citation.

Current Standard

Direct Operation EPS Standards

The new efficiency standards for EPSs established efficiency standards for Direct Operation External Power Supplies. All direct operation external power supplies manufactured on or after two years after the final rule’s date of publication in the Federal Register shall meet the following standards:


Single-Voltage External AC-DC Power Supply, Basic-Voltage

Nameplate Output Power (Pout)

Minimum Average Efficiency in Active Mode 
(expressed as a decimal)

Maximum Power in No-Load Mode [W]

Pout ≤ 1 W

≥0.5 × Pout + 0.16

≤0.100

1 W < Pout ≤ 49 W

≥0.071 × ln(Pout) - 0.0014 × Pout + 0.67

≤0.100

49 W < Pout ≤ 250 W

≥0.880

≤0.210

Pout > 250 W

≥0.875

≤0.500

Single-Voltage External AC-DC Power Supply, Low-Voltage

Nameplate Output Power (Pout)

Minimum Average Efficiency in Active Mode 
(expressed as a decimal)

Maximum Power in No-Load Mode [W]

Pout≤1 W

≥0.517 × Pout + 0.087

≤0.100

1 W < Pout≤49 W

≥0.0834 × ln(Pout) - 0.0014 × Pout + 0.609

≤0.100

49 W < Pout≤250 W

≥0.870

≤0.210

Pout > 250 W

≥0.875

≤0.500

Single-Voltage External AC-AC Power Supply, Basic-Voltage

Nameplate Output Power (Pout)

Minimum Average Efficiency in Active Mode 
(expressed as a decimal)

Maximum Power in No-Load Mode [W]

Pout ≤ 1 W

≥0.5 × Pout + 0.16

less than equal to sign 0.210

1 W < Pout less than equal to sign 49 W

≥0.071 × ln(Pout) - 0.0014 × Pout + 0.67

less than equal to sign 0.210

49 W < Pout less than equal to sign 250 W

≥0.880

less than equal to sign 0.210

Pout > 250 W

≥0.875

less than equal to sign 0.500

   下面我们在看看欧盟CoC V5六级能效标准与要求的原文节选

AIM
To minimise energy consumption of external power supplies both under no-load and load conditions in the output power range 0.3W to 250W.

COMMITMENT
Signatories of this Code of Conduct commit themselves to:
Design power supplies or component so as to minimise energy consumption of external power supplies. Those companies who are not responsible for the production of power supplies shall include the concept of minimisation of energy consumption in their purchasing procedures of power supplies.

Achieve both the no-load power consumption and on-mode efficiency targets shown in Table 1.1, Table 2.1 and 2.2 for at least 90% of products2, for the new models of external power supplies that are introduced on the market or specified in a tender/procurement after the effective date (for new participants after the date they have signed the Code of conduct).

Table 1.1: No-load Power Consumption

Rated Output Power (Pno)
No-load power consumption
Tier 1
Tier 2
≥ 0.3 W and < 49 W
0.150 W
0.075 W
≥ 49 W and < 250 W
0.250 W
0.150 W
Mobile handheld battery driven
and < 8 W
0.075 W
0.075 W

Table 2.1: Energy-Efficiency Criteria for Active Mode (excluding Low Voltage external power supplies)

Rated Output
Power (Pno)
Minimum Four Point Average Efficiency inActive Mode
Minimum Efficiency in Active Mode at 10 %
load of full rated output current
Tier 1
Tier 2
Tier 1
Tier 2
0.3 ≤ W ≤ 1
≥ 0.500 * Pno + 0.146
≥ 0.500 * Pno + 0.169
≥ 0.500 * Pno + 0.046
≥ 0.500 * Pno + 0.060
1 ≤ W ≤ 49
≥ 0.0626*ln(Pno) + 0.646
≥ 0.071*ln(Pno)
– 0.00115 * Pno + 0.670
≥ 0.0626*ln(Pno) + 0.546
≥ 0.071*ln(Pno)
– 0.00115 * Pno + 0.570
49 ≤ W ≤ 250
≥ 0.890
≥ 0.890
≥ 0.790
≥ 0.790
“ln” refers to the natural logarithm. Efficiencies to be expressed in decimal form: an efficiency of 0.88 in decimal
form corresponds to the more familiar value of 88% when expressed as a percentage.

Table 2.2: Energy-Efficiency Criteria for Active Mode for Low Voltage external power supplies

Rated Output
Power (Pno)
Minimum Four Point Average Efficiency inActive Mode
Minimum Efficiency in Active Mode at 10 %
load of full rated output current
Tier 1
Tier 2
Tier 1
Tier 2
0.3 ≤ W ≤ 1
≥ 0.500 * Pno + 0.086
≥ 0.517 * Pno + 0.091
≥ 0.500 * Pno
≥ 0.517 * Pno
1 ≤ W ≤ 49
≥ 0.0755*ln(Pno) + 0.586
≥ 0.0834*ln(Pno)
– 0.0011 * Pno + 0.609
≥ 0.072*ln(Pno) + 0.500
≥ 0.0834*ln(Pno)
– 0.00127 * Pno + 0.518
49 ≤ W ≤ 250
≥ 0.880
≥ 0.880
≥ 0.780
≥ 0.780
“ln” refers to the natural logarithm. Efficiencies to be expressed in decimal form: an efficiency of 0.88 in decimal
form corresponds to the more familiar value of 88% when expressed as a percentage.

The no-load power consumption and the energy efficiency shall be measured and declared
according to the method in the Annex.


Effective dates:
Tier 1: 1 January 2014
Tier 2: 1 January 2016

   根据以上美国能源部和欧盟公布的能效测试要求,很明显看出,美国的能效要求更严格,

下面用12V1.5A 电源适配器举例说明:

1. 按照 DOE 要求: 12V1.5A 电源适配器,输出功率为18W, 平均效率要求为: Average Efficiency = 0.071*In(18)-0.0014*18+0.67= 85.0016% No Load Input Power < 0.1W

2. 按照 CoC V5 的要求: 12V1.5A 电源适配器,输出功率为18W, 平均效率要求为: Average Efficiency = 0.0626*In(18)+0.646= 82.693% No Load Input Power < 0.15 W

根据以上对比结果,美国能效要求相比较欧洲能效法规来讲,要高出近2.4%.





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