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This national standard was drafted in accordance with the rules given in GB/T 1.1-2009
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This national standard is under the jurisdiction of the National Technical Committee on Automobiles of Standardization Administration of China (SAC/TC 114).
Test Methods of Hydrogen Emission for Fuel Cell Engine
1 Scope
This standard is applicable to vehicle test methods of hydrogen emission for fuel cell engine.
This standard is applicable to the proton exchange membrane fuel cell engine for vehicles.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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 Vehicles
3 Requirements of Testing Apparatus
The accuracy requirements of testing apparatus are shown in Table1.
Table 1 Accuracy Requirements of Testing Apparatus
Name Accuracy Remarks
Voltage sensor ≤0.5%FS FS: Full scale
Current sensor ≤0.5%FS
Thermometer ±1℃
Hygrometer ±3% According to the relative error
Hydrogen mass flowmeter ≤1%
4 Measuring Condition
4.1 Requirements of fuel cell engines
Fuel cell engines shall meet the following requirements:
——Maintain the shape and technical parameters of the fuel cell engine at the time of delivery;
——The fuel cell engine system shall be complete, and consistent with the loading condition;
——Fuel cell engine insulation performance, air tightness and other related safety performance shall meet the requirements of GB/T 24554;
——The fuel cell engine shall have a reliable safety protection system;
——The hydrogen mass flowmeter shall be installed as close as possible to the hydrogen inlet of the fuel cell engine;
——Fuel cell engines shall use commercial fuels that meet the test requirements. In case of any discrepancy, the fuel requirements shall comply with ISO 14687-2.
4.2 Pre-test fuel cell engine state regulations
Before test, fuel cell engines state shall meet the following requirements:
——Coolant filling completed;
——Preparation for the fuel cell engine is completed and the command can be started.
4.3 Requirements of test data acquisition and power loading error
The requirements of test data acquisition and power loading error as follow:
——Test data sampling frequency shall not less than 2 Hz;
——The power loading error cannot exceed 3%, otherwise the test result is invalid.
5 Testing Method
5.1 Test of hydrogen emission in steady state
5.1.1 Test condition
Prior to the test, the fuel cell engine shall in a warm state, and the heat engine method shall comply with the method specified in GB/T 24554. The test process shall be automated and there shall be no manual intervention.
5.1.2 Test methods
Test methods shall meet the following requirements:
a) Select 11 condition points within the fuel cell engine operating range, namely, idle speed, 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 the heat engine, after the process finishes, returns to the idling state to run for 10s;
c) According to the specified loading method, it is loaded into the pre-determined condition point, and at least continuously and stably runs for 3 min at each condition point;
d) The length of analysis data for each condition point shall not be less than 2 minutes.
Note: PE ——Rated power.
5.1.3 Data measured and recorded in the test process
Data measured during the test, including hydrogen flow rate, fuel cell stack voltage, fuel cell stack current, and others.
5.1.4 Test results processing
The actual hydrogen consumption of the fuel cell stack, the theoretical hydrogen consumption of the fuel cell stack, the hydrogen emission, and the hydrogen emission rate shall be tested according to the methods provided in Annex A.
Foreword i
1 Scope
2 Normative References
3 The Requirements of Testing Apparatus and Equipment
4 Measuring Condition
5 Testing Method
Annex A (Normative) Related Calculation Formulae
Annex B (Normative) Cyclic Condition Loading Method
