Guides for energy efficiency assessment of continuous galvanizing process
1 Scope
This standard specifies the terms and definitions, assessment procedures, boundaries and scope of energy consumption statistics, benchmark energy consumption, actual energy consumption, energy efficiency index, energy efficiency analysis and measures for optimizing energy efficiency in connection with the energy efficiency assessment of continuous galvanizing process of steel strips.
This standard is applicable to energy efficiency assessment and energy-saving potential analysis of the continuous galvanizing process in iron and steel enterprises.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 17167 General principle for equipping and managing of the measuring instrument of energy in organization of energy using
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
GB/T 28924 Guides for calculating energy efficiency index of an iron and steel enterprise
YB/T 4211 Determination and calculation of heat balance of furnace for CGL
YB/T 4662 General principles for energy efficiency assessment of iron and steel enterprises
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 23331, GB/T 28924 and YB/T 4662 apply.
4 Assessment procedures
The requirements of YB/T 4662 shall apply.
5 Boundaries and scope of energy consumption statistics
5.1 Process boundary division
The boundary of continuous galvanizing process starts from the input of raw materials (raw steel coils and zinc ingots, etc.), energy, and energy-consumed mediums, and ends with the output of the final hot-dip galvanized steel coil products and the externally supplied energy.
Refer to Annex A for the boundary division of the continuous galvanizing process.
5.2 Scope of energy consumption statistics
The scope of energy consumption statistics for the continuous galvanizing process is defined as follows:
a) Including dedicated water and gas supply systems separately equipped for the production line, in which case the corresponding energy-consumed medium is selected and input;
b) Including all sub-processes of the continuous galvanizing process, as well as the feeding process of raw material steel coils and the process of going off-line, packaging and warehousing of steel coil products;
c) Including machine maintenance, inspection, laboratory testing, metering, transportation, production management and scheduling systems, as well as auxiliary production systems such as heating or cooling, lighting, and storage;
d) Including the loss of various energy sources within the interface of the continuous galvanizing process;
e) Excluding recycled and externally supplied energy sources;
f) Excluding energy used for life purposes, such as canteen, offices, and rest rooms, which are not related to production; and
g) Excluding treatment of waste water, waste gas and solid waste.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Assessment procedures
5 Boundaries and scope of energy consumption statistics
6 Benchmark of energy consumption
7 Actual energy consumption
8 Energy efficiency index
9 Energy efficiency analysis
10 Measures for optimizing energy efficiency
Annex A (Informative) Boundary division of the continuous galvanizing process
Annex B (Informative) Recommended values for the coefficient of converting energy sources and energy-consumed mediums into standard coal
Bibliography
