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GB/T 40084-2021 (GB/T40084-2021, GBT 40084-2021, GBT40084-2021)
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GB/T 40084-2021: PDF in English (GBT 40084-2021)

GB/T 40084-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Guidance for energy management performance
assessment in iron and steel industry
ISSUED ON: APRIL 30, 2021
IMPLEMENTED ON: NOVEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Basic requirements ... 5 
4.1 Assessment principle ... 5 
4.2 Assessment basis... 5 
4.3 Assessment conditions ... 5 
4.4 Assessment boundary ... 6 
5 Assessment contents ... 6 
5.1 Assessment preparation ... 6 
5.2 Data and information collection and statistics ... 7 
5.3 Energy management maturity assessment ... 8 
5.4 Energy performance assessment ... 8 
6 Assessment report ... 15 
Appendix A (Informative) Energy management performance assessment report
outline of ×× iron and steel enterprise ... 16 
References ... 18 
Guidance for energy management performance
assessment in iron and steel industry
1 Scope
This Standard provides guidance for the basic requirements, assessment
contents and assessment reports of energy management performance
assessment in iron and steel industry.
This Standard applies to the energy management performance assessment of
iron and steel enterprises that target iron and steel smelting and rolling
processing.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 2589, General principles for calculation of the comprehensive energy
consumption
GB 17167, General principle for equipping and managing of the measuring
instrument of energy in organization of energy using
GB 21256, The norm of energy consumption per unit product of major
individual - Process of crude steel manufacturing process
GB 21342, The norm of energy consumption per unit product of coke
GB/T 21368, Specification for equipping and managing of measuring
instrument of energy in the iron and steel industry
GB/T 23331, Energy management systems - Requirements with guidance
for use
GB/T 39775-2021, General principle for energy management performance
assessment
GB 50506, Code for design of water saving for iron and steel enterprises
e) In accordance with the requirements of GB/T 23331, an energy
management system has been established and operated;
f) Have continuous and accurate statistics on energy performance.
4.4 Assessment boundary
Determine the boundaries of energy management performance assessment
according to the management responsibilities, product scope and geographic
area of iron and steel enterprises.
The boundary of energy management performance assessment of iron and
steel enterprises can include the main production system, auxiliary production
system and subsidiary production system of the enterprise, excluding the
mining and washing system.
a) Main production system: It mainly includes coking, sintering, pelletizing,
iron-making, steel-making, hot rolling, cold rolling, color coating,
galvanizing and other main production systems.
b) Auxiliary production system: It mainly includes auxiliary production
systems such as power, power supply, water supply, oxygen production,
heating power, gas, air supply, machine repair, and transportation.
c) Subsidiary production system: It mainly includes the production command
system (factory headquarters) and the departments and units (such as
staff canteens, workshop bathrooms) that serve production in the factory
area.
5 Assessment contents
5.1 Assessment preparation
Before conducting energy management performance assessment, make the
following preparations:
a) Identify laws, regulations, standards and requirements from countries,
industries, localities and other related parties.
b) Determine the assessment scope. Due to the differences in the processes
and products of iron and steel enterprises, the energy management
performance assessment scope can include all or part of the systems
within the scope of assessment boundary of 4.4; it is an independent
accounting unit.
5.4.2 Assessment indicator calculation method
5.4.2.1 Calculation method of quota indicators
The sintering process energy consumption, the pelletizing process energy
consumption, the blast furnace process energy consumption, and the converter
process energy consumption are calculated according to the method that is
specified in GB 21256; the coking process energy consumption is calculated
according to the method that is specified in GB 21342.
If the enterprise’s location has issued a local quota standard for energy
consumption of the process, it shall be calculated according to the calculation
method in the local quota standard.
5.4.2.2 Calculation method of efficiency improvement indicators
Calculate indicators such as the comprehensive energy consumption per ton of
steel, the hot rolling process energy consumption, the cold rolling process
energy consumption, the electricity consumption per ton of steel, and the new
water consumption per ton of steel of the enterprise, according to the product
output and energy consumption in the energy balance sheet of the enterprise.
The comprehensive energy consumption per ton of steel is calculated
according to the method that is specified in GB/T 2589.
The indicator improvement rate is calculated according to Formula (1):
Where:
Y – indicator improvement rate;
Apre – indicator of the previous year;
A – Assessment annual indicators.
5.4.2.3 Calculation method of task indicators
Comparing with the energy-saving target liability statements that are signed by
the enterprise and the government authority, the annual energy-saving plan
targets that are issued by the enterprise, and according to the data in the
enterprise “energy balance sheet”, calculate and assess the completion rate of
the annual task indicators.
a) Whether it is suitable for the scale of the enterprise, manufacturing
techniques, and energy use;
b) Whether it fully covers the main production system, auxiliary production
system and subsidiary production system of the enterprise;
c) Whether it fully covers the main processes and activities of energy design,
procurement, storage, processing and conversion, transportation and
distribution, use, and surplus energy recovery and utilization.
5.4.4.3 Validity assessment of energy performance indicators
The validity of energy performance indicators depends on the validity and
reliability of basic data and related documents.
In the assessment process, identify the factors that affect the validity of energy
performance indicators. Possible influencing factors include:
-- The validity and reliability of basic data and related documents cannot be
fully verified;
-- Major changes have taken place in the manufacturing techniques and
product structure;
-- Major changes have taken place in the main equipment;
-- Major changes have taken place in the production organization and
production scale;
-- Major changes have taken place in the energy structure;
-- Force majeure, etc.
When the identified influencing factors have a significant impact on the validity
of energy performance indicators, they shall be assessed and explained.
5.4.4.4 Output of energy performance assessment
Use the method of sub-item scoring to assess and score the assessment
indicators in accordance with 5.4.3; obtain the total score after summarizing.
The assessment results are divided into four grades according to the total score,
as shown in Table 4.
Table 4 – Energy performance assessment gradation results
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.