GB 32311-2015 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 32311-2015 | English | 145 |
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Minimum allowable values of energy efficiency and energy efficiency grades for hydrogen producing systems by water electrolysis
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GB 32311-2015: Minimum allowable values of energy efficiency and energy efficiency grades for hydrogen producing systems by water electrolysis
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB32311-2015
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Minimum allowable values of energy efficiency and
energy efficiency grades for hydrogen producing
systems by water electrolysis
Issued on. DECEMBER 10, 2015
Implemented on. JANUARY 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Technical requirements... 5
5 Test methods... 6
6 Inspection rules... 7
Appendix A (Normative) Calculate gas output by measured current value... 8
Appendix B (Normative) Calculation of specific energy consumption value... 9
Appendix C (Normative) Calculation of energy efficiency... 11
Foreword
4.3 of this Standard is mandatory. The rest are recommended.
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by Department of Resource Conservation and
Environmental Protection of the NDRC and Department of Energy
Conservation and Comprehensive Utilization of the MIIT.
This Standard shall be under the jurisdiction of National Technical Committee
20 on Energy Fundamentals and Management of Standardization
Administration of China (SAC/TC 20).
Main drafting organizations of this Standard. China National Institute of
Standardization, Suzhou Jingli Hydrogen Production Equipment Co., Ltd., The
718th Research Institute of CSIC, Tianjin Mainland Hydrogen Equipment Co.,
Ltd., China Electronics Engineering Design Institute, Sichuan Kintong New
Material Co., Ltd., Suzhou Electrical Apparatus Science Academy Co., Ltd.,
Zhejiang Lihydrogen Energy Technology Co., Ltd.
Main drafters of this Standard. Zhang Xiangchun, Zhang Bihang, Wang Geng,
Zhou Zhenfang, Xue Helai, Xu Wei, Wu Jinlan, Li Yan, An Zhixing, Qian Youping,
He Xiuming, Liang Baoming, Shuai Xingru.
Minimum allowable values of energy efficiency and
energy efficiency grades for hydrogen producing
systems by water electrolysis
1 Scope
This Standard specifies the minimum allowable values of energy efficiency,
evaluating values of energy conservation, energy efficiency grades, test
methods, and inspection rules for hydrogen producing systems by water
electrolysis (hereinafter referred to as hydrogen producing systems).
This Standard applies to fixed or mobile hydrogen producing systems. The
structure of water electrolyser is bipolar, press-filtration, pressure type; the
output is ≥5 m3/h.
This Standard does not apply to atmospheric-pressure hydrogen producing
equipment by water electrolysis, small-scale hydrogen producing equipment
with an output < 5 m3/h, solid polymer electrolyte electrolyser (SPE), and
hydrogen-oxygen generator.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 19774 Specification of water electrolyte system for producing hydrogen
GB/T 24499 Technology glossary for gaseous hydrogen, hydrogen energy
and hydrogen energy system
3 Terms and definitions
The terms and definitions defined in GB/T 24499 and the following ones apply
to this document.
3.1 Specific energy consumption values for hydrogen producing systems
by water electrolysis
3.2 The energy efficiency values for hydrogen producing systems by
water electrolysis
The ratio OF the theoretical specific energy consumption values TO the actual
specific energy consumption values for hydrogen producing systems operating
under rated working condition.
3.4 The evaluating values of energy conservation for hydrogen producing
systems by water electrolysis
The minimum allowable energy efficiency values for energy-conservation
hydrogen producing systems under rated working condition.
4 Technical requirements
4.1 Basic requirements
The hydrogen producing systems by water electrolysis to which this Standard
applies shall comply with the requirements of GB/T 19774.
4.2 Energy efficiency grades
The energy efficiency grades for hydrogen producing systems are divided into
3 grades.
4.4 Evaluating values of energy conservation
The evaluating value of energy conservation for hydrogen producing systems
is energy efficiency grade 2 in Table 1.
5 Test methods
5.1 The specific energy consumption values for hydrogen producing systems
retain one decimal place. The energy efficiency value is an integer.
5.3 The technical indicators of raw material water and lye used for energy
efficiency test shall comply with the relevant requirements of GB/T 19774.
5.4 For requirements for the grade of test instruments, the DC ammeter and
ampere-voltage meter are not lower than Grade 0.5; other instruments are not
lower than Grade 1.
5.5 The number of tests per unit DC energy consumption should not be less
than 6 times. The interval is 10 min. TAKE the average.
5.7 Based on the measured DC current value and the number of cells of the
electrolyser, according to Appendix A, calculate the hydrogen output of
hydrogen producing systems.
5.8 Based on the measured DC voltage value and the number of cells of the
electrolyser, according to Appendix B, calculate the electrolyser’s average cell
voltage and unit DC energy consumption.
5.9 Based on the measured electric power for lye pump, make-up water pump,
and the control, according to Appendix B, calculate the unit AC energy
consumption of hydrogen producing systems.
The unit DC energy consumption plus the unit AC energy consumption obtains
the specific energy consumption values for hydrogen producing systems.
6 Inspection rules
6.1 The energy efficiency test of the product may be carried out at the
manufacturer or the user. If the measured value of energy efficiency meets the
specified requirements, it is regarded as a qualified product; otherwise it is
regarded as an unqualified product.
6.2 The test of energy efficiency grade for the product shall be carried out before
the product’s commissioning and acceptance. When the user and the
manufacturer have objection to the test of energy efficiency grade for the
product, it may be arbitrated by a third-party professional institution with
relevant qualifications.
Appendix A
(Normative)
Calculate gas output by measured current value
A.1 Principle summary
According to the law of electrolysis - The change in quantity of any substance
in the electrolysis process obeys Faraday’s law.
A.2 Faraday’s law when producing hydrogen by water electrolysis
Under a standard state, 1 moL of water can be electrolyzed using 2×96500 C
of electric quantity to produce 1 moL of hydrogen and 0.5 moL of oxygen.
The volume of 1 moL of hydrogen under the standard state is 22.43×10-3 m3.
Therefore, under the standard state, the theoretical electric quantity required to
produce 1 m3 of hydrogen is that of formula (A.1).
Appendix B
(Normative)
Calculation of specific energy consumption value
B.1 Calculation of specific energy consumption value W
The specific energy consumption value W consists of two parts, i.e. the DC unit
energy consumption value Wd and the AC unit energy consumption value Wa.
B.2 Calculation of DC unit energy consumption value Wd
B.3 Calculation of AC unit energy consumption value Wa
The power of AC electricity consists of 3 parts. P1, P2, and P3.
AC unit energy consumption value Wa is calculated according to (B.3).
Appendix C
(Normative)
Calculation of energy efficiency
The calculation of energy efficiency η is on the basis of electrochemical principle.
When the cell voltage is a thermal neutral voltage, the water electrolyser, when
working, does not generate waste heat. The energy efficiency at this time is set
to 100%.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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