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GB/T 34593-2017: Test methods of hydrogen emission for fuel cell engine Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 34593-2017: Test methods of hydrogen emission for fuel cell engine---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/GBT34593-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.060.01 T 10 Test methods of hydrogen emission for fuel cell engine Issued on: OCTOBER 14, 2017 Implemented on: MAY 1, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; China National Standardization Administration. Table of ContentsForeword . 3 1 Scope .. 4 2 Normative references . 4 3 Requirements of test instrument and equipment . 4 4 Measurement conditions . 4 5 Test methods . 5 Appendix A (Normative) Related calculation formula . 8 Appendix B (Normative) Cycle conditions loading method .. 11 Test methods of hydrogen emission for fuel cell engine1 ScopeThis standard specifies test methods of hydrogen emission for vehicle fuel cell engines. This standard applies to vehicle proton exchange membrane fuel cell engines.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 24554 Performance test methods for fuel cell engines ISO 14687-2 Hydrogen fuel - Product specification - Part 2. Proton exchange membrane (PEM) fuel cell applications for road vehicles3 Requirements of test instrument and equipmentThe accuracy requirements of test instrument and equipment are shown in Table 1. Table 1 -- The accuracy requirements of test instrument and equipment Designation Accuracy Remarks Voltage sensor ≤0.5%FS FS. full scale Current sensor ≤0.5%FS Thermometer ±1°C Hygrometer ±3% Calculate according to relative error Hydrogen mass flowmeter ≤1%4 Measurement conditions4.1 Fuel cell engine requirements Fuel cell engine shall meet the following requirements. 5.1.2 Test methods Test methods shall meet the following requirements. a) Select 11 operating points within the range of fuel cell engine operating, including idle state, 10%PE, 20%PE, 30%PE, 40%PE, 50%PE, 60%PE, 70%PE, 80%PE, 90%PE, PE; b) The fuel cell engine carries out heating engine, after the process of heating engine finishes, return to idle state and operate for 10s; c) Load to pre-determined operating points according to the specified loading method, and at least continuously and stably operate for 3 minutes at each operating point; d) The time duration of analyzing data for each operating point cannot be less than 2 minutes. Note. PE --- rated power. 5.1.3 Data measured and recorded during the test Data measured during the test. hydrogen flow, fuel cell stack voltage, fuel cell stack current, etc. 5.1.4 Test result processing Conduct test result processing for the actual hydrogen consumption of fuel cell stack, the theoretical hydrogen consumption of fuel cell stack, hydrogen emission load, and hydrogen emission rate according to the methods provided in Appendix A. 5.2 Hydrogen emission load test under cycle conditions 5.2.1 Test conditions Before the test, fuel cell engine is in hot state, and the heating engine method is performed according to the method specified in GB/T 24554. The test process shall be conducted automatically and there shall be no manual intervention. 5.2.2 Test methods The test is carried out as follows. a) The fuel cell engine carries out heating engine, after the process of heating engine finishes, return to idle state and operate for 10s; T1 - Start time, in seconds (s); T2 - End time, in seconds (s). The theoretical hydrogen flow is calculated according to Faraday's formula. Where. qH2_theo - The theoretical hydrogen flow of fuel cell stack, in grams per second (g/s); M - Hydrogen molar mass, 2.016 g/mol; I - Fuel cell stack current, in Ampere (A); N - The single-cell number of fuel cell stack; n -The number of electrons released by each hydrogen molecule, 2; F - Faraday constant, 96485 C/mol. A.3 Hydrogen emission load The hydrogen emitted by fuel cell stack during a certain period of time is calculated according to formula (A.4). Where. mH2_emis - The mass of the emitted hydrogen, in grams (g); mH2 - The measured hydrogen consumption of fuel cell stack, in grams (g); mH2_theo - The theoretical consumption mass of hydrogen, in grams (g). A.4 Hydrogen emission rate The hydrogen emission rate of fuel cell stack during a certain period of time is calculated according to formula (A.5). Where. bH2_emis - Hydrogen emission rate, in grams per kWh [g/(kWꞏh)]; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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