GB/T 33983.1-2017 English PDF (GB/T33983.1-2017)
GB/T 33983.1-2017: Direct methanol fuel cell system - Part 1: SafetyDelivery: 9 seconds. Download (and Email) true-PDF + Invoice.Get Quotation: Click GB/T 33983.1-2017 (Self-servic e in 1-minute)Newer / historical versions: GB/T 33983.1-2017Preview True-PDF ScopeThis Part of GB/T 33983 specifies the safety requirements, protective measures, type tests, routine tests, as well as identification, labeling and packaging of the direct methanol fuel cell system under normal operation, foreseeable faulty operation and transportation, etc. This Part is applicable to the direct methanol fuel cell system fueled by methanol or methanol aqueous solution with a rated power of not greater than 1,000 W. For the above-mentioned system, when the rated power is less than or equal to 240 W, it belongs to the category of micro fuel cell system; when the rated power is greater than 240 W, and less than or equal to 1,000 W, it belongs to the category of mobile direct methanol fuel cell system. See the specific classification in Table 1. For the direct methanol fuel cell system with a rated power of greater than 1,000 W, the safety requirements and test methods may take this Standard as a reference. This Part merely considers hazardous situations that may impair the public safety, human health or the environment beyond the direct methanol fuel cell system, and proposes safety requirements for such hazardous situations, excluding safety precautions that shall be taken against the damage that may be caused to the system itself, assuming that such damage will not cause a hazard to the exterior of the direct methanol fuel cell. The prerequisite in this Part is not intended to limit innovation. When using materials, designs or manufactures different from those in this Standard, they shall be equivalent or at the same level as the safety and performance specified in this Part. A schematic diagram of the boundary of a typical direct methanol fuel cell system is shown in Figure 1. The direct methanol fuel cell system and its protective devices shall be designed and manufactured so that it can achieve the intended functions under the physical environment and operating conditions specified by the manufacturer. 4.2.2 Environmental conditions The manufacturer shall specify the environmental conditions for the operation of the direct methanol fuel cell system, and consider the following factors: ---The direct methanol fuel cell system shall be operated in a well-ventilated environment. If the air circulation in the operating space where the direct methanol fuel cell system is located is blocked, then, a combustible gas alarm shall be installed in the operating environment, and the concentration detection range of the alarm shall comply with the safety requirements for leakage in 4.4 and the exhaust emission limits in 4.5.1; ---There shall be no open flames in the operating environment of the direct methanol fuel cell system; ---The ranges of air temperature, humidity and altitude, etc., where the direct methanol fuel cell system can normally operate; ---The direct methanol fuel cell system may be placed in unmanned areas. 4.2.3 Fuel input The manufacturer shall specify the methanol fuel concentration and input mode for use in the direct methanol fuel cell system. 4.2.4 Vibration and impact The direct methanol fuel cell system shall have certain resistance against impact and vibration, so as to ensure that the generated impact and vibration during normal use, transportation or storage will not cause damage to the various components of the direct methanol fuel cell system. The adverse effects of vibration and impact may be avoided by installing anti-vibration facilities. 4.2.5 Requirements for transportation and storage temperature The direct methanol fuel cell system shall be designed to withstand or maintain transportation and storage temperatures of 1 C ~ 55 C after taking appropriate precautions. The manufacturer may also specify alternative temperature ranges. 4.3 Safety Requirements for Materials Materials used for sealing or connection, as well as materials used to construct the direct methanol fuel cell power generation system, or the exterior and interior of the unit shall be applicable to all possible physical, chemical and thermal operating conditions of the equipment within the service life specified by the manufacturer, in particular, they shall be also applicable to the test condition. Under normal conditions of use, the materials shall be able to maintain mechanical and thermal stability. ---The materials shall be able to resist the chemical and physical effects of methanol and the products generated by the electrochemical reaction of methanol, such as: formaldehyde and formic acid, etc., and also be able to resist the deterioration of the external environmental quality; ---Within the service life of the equipment specified by the manufacturer, the chemical and physical properties related to operational safety shall not be significantly affected; in particular, when selecting materials and manufacturing methods, the corrosion and wear resistance, electrical conductivity, impact strength, ageing resistance and the effects of temperature variations of the materials, as well as the effects that may occur when the materials are put together shall be taken into consideration; ---When the used materials are known to be dangerous under certain conditions, the manufacturer shall take various precautions and provide the user with necessary information, so as to minimize the risks to personal safety and health; ---Thoroughly consider the possible corrosion, wear, erosion or other chemical reaction corrosions of these materials; try to select materials that comply with the flame retardant test requirements in GB/T 4943.1; ---Vulcanized rubber and thermoplastic rubber parts shall be subject to hot air accelerated ageing test and heat resistance test (ageing time not less than 96 h) in accordance with the stipulations of 7.2 and 7.3 in GB/T 3512-2001, so as to ensure that the performance (elasticity and tensile strength, etc.) after the test can still satisfy the safe application of the power generation system within the expected service life. 4.4 Safety Requirements for Leakage The leakage test shall be respectively carried out on the external fuel container and fuel cell power unit, which have been subject to vibration, drop and high-temperature exposure. After the test, the external fuel container and fuel cell power unit shall manifest no methanol fuel leakage. For the micro direct methanol fuel cell system, the fuel mass loss per unit time shall be less than 0.08 g/h; for the mobile direct methanol fuel cell system, the fuel mass loss per unit time shall be less than 2.6 g/h. The measures of handling accidental release of methanol shall comply with Appendix A. 4.5 Requirements and Protective Measures for Exhaust Emission 4.5.1 Requirements for exhaust emission limits During normal use or foreseeable misoperation of the direct methanol fuel cell system, the hazards to the user and the environment caused by the exhaust emission of the system shall be avoided, and the exhaust vent shall be marked. c) Water drainage devices or measures shall be provided to prevent the accumulation of water, ice, snow and other debris in the exhaust ducts or the blockage of the exhaust ducts; d) The end of the exhaust ducts shall be placed in a safe area with air circulation, and away from ignition sources and indoor air lets; e) Except for the outlet, the exhaust system of the direct methanol fuel cell system shall be sealed without any leakage; f) The materials used in the manufacture of the exhaust system shall have a tolerable temperature of not lower than the maximum temperature of the conveyed exhaust gas. 4.6 Requirements for Electrical Safety 4.6.1 Electrical overload In accordance with 5.1.4.1, carry out the electrical overload test. Within 1 min of the overload test, the protective circuit of the direct methanol fuel cell system shall act. If the over-power protection function is triggered first during the test, it is also considered valid. During the overload test, the fuel cell system shall not emit smoke, or manifest an outbreak of fire, explosion and leakage. 4.6.2 Insulation resistance Under the standard atmospheric conditions, when a voltage of 500 V is applied, the insulation resistance of the direct methanol fuel cell system shall be not lower than 10 M. 4.7 High-temperature Exposure In accordance with 5.2.1, carry out the high-temperature exposure test. During the high- temperature exposure test, the direct methanol fuel cell system shall be free from leakage, fire and explosion. 4.8 Vibration Except when it is specially stipulated, the vibration test is merely carried out on the external fuel container and the micro fuel cell power unit. For the mobile fuel cell power unit, the vibration test is not required. In accordance with 5.2.2, carry out the vibration test on partially filled external fuel containers and fuel cell power units filled under the instruction manual provided by the manufacturer: a) During the vibration test, the direct methanol fuel cell system is in operation, and the fuel cell power unit and the external fuel container shall not manifest mechanical instability, deformation, fracture or wear that may cause hazards to human health or the environment. Meanwhile, there shall be no leakage, fire or explosion of methanol fuel, reaction products and other liquids in the fuel containers and fuel cell power units; b) During the vibration test, the direct methanol fuel cell system is in a cold state, and the system shall not autonomously start during the test. In accordance with 5.1.1, carry out the leakage test on the partially filled external fuel containers and the fuel cell power units filled in accordance with the instruction manual provided by the manufacturer that have been subject to the vibration test. The leakage test results shall comply with the relevant stipulations of 4.4. 4.9 Drop Except when it is specially stipulated, the drop test is merely carried out on the external fuel container and the micro fuel cell power unit. For the mobile fuel cell power unit, the drop test is not required. In accordance with 5.2.3, carry out the drop test on partially filled external fuel containers and fuel cell power units filled under the instruction manual provided by the manufacturer: a) During the drop test, the direct methanol fuel cell system is in operation, and the fuel cell power unit and the external fuel container shall not manifest mechanical instability, deformation, fracture or wear that may cause hazards to human health or the environment. Meanwhile, there shall be no leakage, fire or explosion of methanol fuel, reaction products and other liquids in the fuel containers and fuel cell power units; b) During the drop test, the direct methanol fuel cell system is in a cold state, and the system shall not autonomously start during the test. In accordance with 5.1.1, carry out the leakage test on the partially filled external fuel containers and the fuel cell power units filled in accordance with the instruction manual provided by the manufacturer that have been subject to the drop test. The leakage test results shall comply with the relevant stipulations of 4.4. 4.10 Humidity In accordance with the stipulations of 5.2.4, carry out the humidity test on the direct methanol fuel cell system. After the test, in accordance with the stipulations of 5.1.4.2, test the insulation resistance of the direct methanol fuel cell system. The test results shall comply with the requirements for insulation resistance specified by the manufacturer. 4.11 Rainfall In accordance with the stipulations of 5.2.5, carry out the rainfall test on the direct methanol fuel cell system. After the test, in accordance with the stipulations of 5.1.4.2, test the insulation resistance of the direct methanol fuel cell system. The test results shall comply with the operation state, the operation of the direct methanol fuel cell system is terminated by starting the control device. 4.12.2.2.2 Emergency shutdown Emergency shutdown shall be part of the direct methanol fuel cell control system. In order to avoid actual or imminent danger (which cannot be corrected by the control device), it shall have the following functions: ---Prevent the occurrence of hazards without creating new dangerous situations; ---When necessary, trigger or allow certain protective measures; ---No matter what operating mode that the direct methanol fuel cell is in, after the emergency switch is activated, the emergency shutdown has the first right to operate; ---The system cannot be restarted without the emergency switch being reset; ---The reset of the emergency switch shall not lead to the occurrence of any dangerous situation. If a manual emergency shutdown device is adopted in accordance with the safety and reliability requirements in 4.1, then, clearly visible, easily identifiable and quickly accessible control components, for example, buttons, shall be equipped. When the automatic control system fails, it shall have: ---After the shutdown button is activated, the direct methanol fuel cell system shall be able to achieve shutdown; ---The shutdown button shall not be obstructed; ---The protective device shall remain in full effect; ---The direct methanol fuel cell system shall not be accidentally restarted. Situations that require emergency shutdown include over-temperature, overload, leakage, excessive exhaust emission concentration and shot-circuit leakage of the direct methanol fuel cell system. 4.12.2.2.3 Normal shutdown It shall enable automatic or manual safe shutdown under normal operating conditions. After shutdown, the direct methanol fuel cell system returns to the standby state. 4.12.2.2.4 Abnormal shutdown It shall enable automatic shutdown in abnormal state that will not bring immediate dangers. After an abnormal shutdown, the direct methanol fuel cell system returns to the standby state and cannot be automatically restarted. 4.12.3 Protective components In order to ensure the normal operation of the direct methanol fuel cell system, appropriate protective equipment and components shall be installed, and the following clauses shall be satisfied: a) The appropriate protective equipment and components shall consist of the following components: ---protective devices; ---there are adequate monitoring equipment, such as: indicators and / or alarms, which can be automatically or manually operated, in appropriate places to keep the direct methanol fuel cell system operating within the allowable limits. b) The protective devices shall comply with the following requirements: ---the installation location satisfies the maintenance and detection requirements; ---independent of other possible functions. c) Safety-related gas sensors shall be selected, installed, calibrated, used and maintained in accordance with the stipulations of IEC 61779-6. d) Other control and setting devices shall be clearly identified and detailed, so as to prevent operational errors. Their design shall be able to prevent accidental operations. Except for special stipulations, the mobile direct methanol fuel cell systems need to be equipped with detection devices and alarm devices to detect their over-temperature, overload and short- circuit, etc.; the micro direct methanol fuel cell systems need to be installed with the above- mentioned detection devices and alarm devices in accordance with the manufacturer’s stipulations. Basic Data Standard ID GB/T 33983.1-2017 (GB/T33983.1-2017) Description (Translated English) Direct methanol fuel cell system - Part 1: Safety Sector / Industry National Standard (Recommended) Classification of Chinese Standard K82 Classification of International Standard 27.070 Word Count Estimation 22,221 Date of Issue 2017-07-31 Date of Implementation 2018-02-01 Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China