NB/Z 42001.1-2012The norm of energy consumption per unit product of thermal power equipment manufacturing enterprises - Part 1: Utility boiler (English PDF)

Foreword

This document was issued on 23 August 2012 by the National Energy Administration of the PRC and takes effect on 1 December 2012.

It is a NB/Z guiding technical document: it does not oblige, it guides.

It is classified under ICS 27.060, Chinese classification J 98.

NB/Z 42001 The norm of energy consumption per unit product of thermal power equipment manufacturing enterprises is to be published in parts according to the field of application. The following four parts are currently planned: Part 1: Utility boiler; Part 2: Steam turbine; Part 3: Generator; Part 4: Power station auxiliary machinery.

This part is Part 1 of NB/Z 42001.

This part was drafted in accordance with the rules given in GB/T 1.1-2009 Directives for standardization - Part 1: Structure and drafting of standards.

This part was proposed by, and is under the administration of, the China Electrical Equipment Industry Association.

This part has standardization value; once the statistical sample has been enriched, the form in which this part is to be retained will be determined by review.

Main drafting organization of this part: Beijing Electrotechnical Economy Research Institute of the Machinery Industry.

Participating drafting organizations of this part: Shanghai Electric Power Generation Group; Harbin Boiler Co., Ltd.; Shanghai Boiler Works Co., Ltd.; Dongfang Boiler Co., Ltd.; Beijing Babcock Wilcox Co., Ltd.; Wuxi Huaguang Boiler Co., Ltd.; Jinan Boiler Group Co., Ltd.; Sichuan Chuanguo Boiler Co., Ltd., and others.

Main drafters of this part: Guo Liping, Li Yan, Chen Li, Zhang Yuxiang, Xie Wenjun, Xiao Zibin, Xie Xianhua, Wang Hua, Shen Jiezhong, Yu Haixu, Li Qinqin, and others.

This part is issued for the first time.

1 Scope

NB/Z 42001.1-2012 is the Chinese energy sector document that sets how much energy a factory is allowed to spend to build a utility boiler, expressed in kilograms of standard coal per tonne of steel. It exists because the energy debate around coal power almost always looks at the plant burning the fuel and almost never at the works that made the pressure parts, yet a boiler for a 1000 MW unit is tens of thousands of tonnes of steel that has to be cut, rolled, bent, welded and heat treated, and heat treatment in particular is enormously energy hungry. Chinese industrial policy makes those factories account for that energy, and this document is the yardstick used. What makes it usable rather than merely declaratory is that it fixes actual numbers and the rules for adjusting them. Table 1 gives the limiting values for existing manufacturers by class of unit - 165.0 kg of standard coal per tonne comprehensive consumption for ultra-supercritical, 153.0 for supercritical, 105.6 for subcritical, 82.8 for ultra-high pressure and 59.4 for high pressure - and Table 2 gives the tighter access values that a newly built works has to meet, which run about five percent below the existing-plant figures. Two correction factors keep the comparison fair between factories that are not alike: a regional factor of 1.1 or 1.2 where the monthly average temperature falls below zero or rises above thirty degrees, with Wuhan, Chongqing and Nanjing named as high-temperature cities, and a weight-share factor of up to 1.25 where part of the complete machine is bought in rather than made in house, so that a works that outsources cannot show a good figure simply by making less. The document defines the boundary terms the calculation needs, separating the main production system from the auxiliary production system and process energy from auxiliary energy, sets the calculation principles and method, and closes with the energy saving management measures. Four informative annexes give the average city temperatures, the standard coal conversion coefficients and the worked calculations per unit of output and per unit of output value. It is Part 1 of a planned set of four, the others covering steam turbines, generators and power station auxiliary machinery, and it is a first edition. It was issued on 23 August 2012 by the National Energy Administration.

This part specifies the technical requirements, the calculation principles, the calculation method, and the energy saving management and specific measures for the norm of energy consumption per unit product of utility boilers.

The products covered by this part are utility boilers of rated power 50 MW and above, at high pressure, ultra-high pressure, subcritical, supercritical and ultra-supercritical conditions; other utility boilers may apply it by reference.

This part applies to the calculation and management of the energy consumption per unit product of existing utility boiler manufacturing enterprises, to the control of energy consumption in newly built projects, and to the expectation of low-consumption production by the enterprise.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the edition cited 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/T 12723-2008 General principles for compiling the norm of energy consumption per unit product

GB 17167 General principles for equipping and managing the measuring instruments of energy in organization of energy consumption

3 Terms and definitions

The following terms and definitions apply to this part.

3.1 norm of energy consumption per unit product

The limiting value of the energy that the internal production system of the enterprise is permitted to consume in producing each unit of conforming product; hereinafter abbreviated to the energy consumption norm per unit product. Note: modified from GB/T 12723-2008, definition 3.1.

3.2 the main production system

The complete system, made up of the equipment and the plant of the enterprise, that carries out the process determined for the manufacture of the product. Note: modified from GB/T 12723-2008, definition 3.2.

3.3 auxiliary production system

The system, made up of the equipment and the plant of the enterprise, that carries out the processes serving the main production system. The services provided include the supply of electricity, water, gas, heat and refrigeration, inspection, transport, machine maintenance, instrument maintenance, lighting, warehousing and the materials yard, together with safety, environmental protection and office functions. Note: modified from GB/T 12723-2008, definition 3.3.

3.4 process energy consumption per unit product

The ratio of the comprehensive energy consumption of the main production system of the enterprise to the total quantity of conforming product produced within the enterprise in the same period; that is, the direct comprehensive energy consumption per unit.

3.5 auxiliary energy consumption per unit product

The quantity of energy apportioned to the product from the various forms of energy and energy-carrying media actually consumed by the auxiliary production system of the enterprise during the production period of that product; that is, the indirect comprehensive energy consumption per unit.

3.6 comprehensive energy consumption per unit product

That is, the comprehensive energy consumption per unit product: the sum of the process energy consumption per unit product and the auxiliary energy consumption per unit product.

3.7 overall energy consumption of manufacturing enterprise

The sum of the direct and indirect comprehensive energy consumption incurred by the main production system and the auxiliary production system within the enterprise in order to produce the product during the reporting period.

3.8 share of the weight

The share that the weight of the conforming product completed by the internal production system of the enterprise during the reporting period represents of the weight of the complete machine.

4 Technical requirements

4.1 Limiting values of the energy consumption norm per unit product for existing utility boiler manufacturing enterprises

The limiting values of the energy consumption norm per unit product for existing utility boiler manufacturing enterprises shall comply with the requirements of Table 1.

a) Where, among the air temperatures of the previous year in the region in which the enterprise is located, the average temperature t of some month is below 0 degrees Celsius or above 30 degrees Celsius, including in high-temperature cities, the limiting values of the energy consumption norm in Table 1 shall be multiplied by the regional correction factor K. Where -10 degrees Celsius is less than t and t is less than 0 degrees Celsius, or t is above 30 degrees Celsius, K is taken as 1.1; where t is not above -10 degrees Celsius, or in a high-temperature city, namely Wuhan, Chongqing or Nanjing, K is taken as 1.2. The regional air temperatures may also be taken from Annex A.

b) Where part of the order for a complete machine is fulfilled by procurement, the limiting values of the energy consumption norm in Table 1 shall be multiplied by the weight-share correction factor N. Where the share of the weight is not above 25 percent, N is taken as 1.25; where the share of the weight is not below 75 percent, N is taken as 1.0; where the share of the weight is between 25 percent and 75 percent, N is obtained by interpolation.

Table 1 - Limiting values of the energy consumption norm per unit product for existing utility boiler manufacturing enterprises, in kg of standard coal per tonne

Ultra-supercritical: process energy consumption per unit 138.6, comprehensive energy consumption per unit 165.0.

Supercritical: process energy consumption per unit 128.5, comprehensive energy consumption per unit 153.0.

Subcritical: process energy consumption per unit 88.7, comprehensive energy consumption per unit 105.6.

Ultra-high pressure: process energy consumption per unit 69.6, comprehensive energy consumption per unit 82.8.

High pressure: process energy consumption per unit 49.9, comprehensive energy consumption per unit 59.4.

Note 1: the data given in this table are all upper limits of the energy consumption norm per unit. Note 2: this table applies to a reporting period of not less than three years; where the reporting period is one year, a correction of plus or minus 15 percent shall be taken into account. Note 3: the unit in the table refers to the standard coal consumed per tonne of steel.

4.2 Access values of the energy consumption norm per unit product for newly built utility boiler manufacturing enterprises

The access values of the energy consumption norm per unit product for newly built utility boiler manufacturing enterprises shall comply with the requirements of Table 2.

- the access values of the energy consumption norm in Table 2 are corrected for region according to the principle given in 4.1 a);

- the access values of the energy consumption norm in Table 2 are corrected for the share of the weight according to the principle given in 4.1 b).

Table 2 - Access values of the energy consumption norm per unit product for newly built utility boiler manufacturing enterprises, in kg of standard coal per tonne

Ultra-supercritical: process energy consumption per unit 131.7, comprehensive energy consumption per unit 156.8.

Supercritical: process energy consumption per unit 122.1, comprehensive energy consumption per unit 145.4.

Subcritical: process energy consumption per unit 84.3, comprehensive energy consumption per unit 100.3.

Ultra-high pressure: process energy consumption per unit 66.1, comprehensive energy consumption per unit 78.7.

High pressure: process energy consumption per unit 47.4, comprehensive energy consumption per unit 56.4.

Note 1: the data given in this table are all upper limits of the access values of the energy consumption norm per unit. Note 2: this table applies to a reporting period of not less than three years; where the reporting period is one year, a correction of plus or minus 15 percent shall be taken into account. Note 3: the unit in the table refers to the standard coal consumed per tonne of steel.