GB 21258-2017The norm of energy consumption per unit product of general coal-fired power set (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T

1.1-2009.

This standard replaces GB 21258-2013 "The norm of energy consumption per

unit product of general coal-fired power set". As compared with GB

21258-2013, the main changes are as follows.

- ADD the limit level of energy consumption per unit of product (SEE

Chapter 4);

- DELETE the "energy consumption advanced value" and "energy

management and measures";

- MODIFY the energy consumption limits and energy consumption access

values indicators (SEE Chapters 4, clause 5.1 and 5.2; clause 4.1, 4.2 and

1 Scope

This standard specifies the limit level, technical requirements, statistical scope

and calculation method for energy consumption per each unit of power supply

from the general coal-fired power set (hereinafter referred to as "energy

consumption").

This standard applies to the calculation and assessment of the energy

consumption of the general coal-fired power enterprise as well as the energy

consumption control for the newly built machine unit.

This standard does not apply to cogeneration units, circulating fluidized bed

units, and resource comprehensive utilization units.

2 Normative references

The following documents are essential to the application of this document. For

the dated documents, only the versions with the dates indicated are applicable

to this document; for the undated documents, only the latest version (including

all the amendments) are applicable to this Standard.

GB/T 2589 General principles for calculation of the comprehensive energy

consumption

GB/T 12723 General principles for establishing allowance of energy

consumption per unit throughput

GB 13223 Emission standard of air pollutants for thermal power plants

DL/T 904 Calculating method of economic and technical index for thermal

power plant

DL/T 1365 Terminology of energy saving of electric power

3 Terms and definitions

The terms and definitions as defined in GB/T 12723 and DL/T 1365 and the

following terms and definitions are applicable to this document.

3.1

Net coal consumption

During the statistical period, the amount of standard coal consumed by

supplying 1 kW - h energy from the machine unit.

[Definition 5.3.1.19 of DL/T 1365-2014]

3.2

Load coefficient of a unit

Output coefficient of a unit

During the statistical period, the ratio of the total output power of the unit

machine unit to the rated power of the machine unit, that is, the ratio of the

utilization hours of the machine unit to the running hours of the machine unit.

[Definition 4.2.12 of DL/T 1365-2014]

3.3

Meet the emission standard

The concentration of soot, sulfur dioxide, nitrogen oxides, mercury and its

compounds in the flue gas of the general coal-fired power set, and the

blackness of the flue gas comply with the emission requirements of GB

13223 and local standard.

3.4

Ultra low emission

Under the condition of 6% of the baseline oxygen content, the emission

concentration of soot, sulfur dioxide and nitrogen oxides in the standard dry

flue gas of the general coal-fired power set is not higher than 10 mg/m3, 35

mg/m3 and 50 mg/m3, respectively.

4 Energy consumption limit level

The limit level of the energy consumption per unit product of the general

coal-fired power set is as shown in Table 1, wherein the level 1 energy

consumption is the lowest.

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