IEC 62282-7-2:2021 pdf download

IEC 62282-7-2:2021 pdf download.Fuel cell technologies – Part 7-2: Test methods – Single cell and stack performance tests for solid oxide fuel cells (SOFCs)
1 Scope
This part of IEC 62282 applies to SOFC cell/stack assembly units, testing systems, instruments and measuring methods, and specifies test methods to test the performance of SOFC cells and stacks. This document is not applicable to small button cells that are designed for SOFC material testing and provide no practical means of fuel utilization measurement. This document is used based on the recommendation of the entity that provides the cell performance specification or for acquiring data on a cell or stack in order to estimate the performance of a system based on it. Users of this document can selectively execute test items suitable for their purposes from those described in this document. Users can substitute selected test methods of this document with equivalent test methods of IEC 62282-8-101 for solid oxide cell (SOC) operation for energy storage purposes, operated in reverse or reversible mode.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-485, International Electrotechnical Vocabulary (IEV) – Part 485: Fuel cell technologies (available at http://www.electropedia.org) IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances IEC 60584-3, Thermocouples – Part 3: Extension and compensating cables – Tolerances and identification system IEC 61515, Mineral insulated metal-sheathed thermocouple cables and thermocouples ISO 5168, Measurement of fluid flow – Procedures for the evaluation of uncertainties ISO 6141, Gas analysis – Contents of certificates for calibration gas mixtures ISO 6142-1 , Gas analysis – Preparation of calibration gas mixtures – Gravimetric method for Class I mixtures ISO 6143, Gas analysis – Comparison methods for determining and checking the composition of calibration gas mixtures ISO 6145-7, Gas analysis – Preparation of calibration gas mixtures using dynamic methods – Part 7: Thermal mass-flow controllers
3 Terms, definitions and symbols
3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-485 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • • IEC Electropedia: available at http://www.electropedia.org/ ISO Online browsing platform: available at http://www.iso.org/obp 3.1.1 cell/stack assembly unit unit including a single cell or stack, as well as gas supply parts, current collector parts, and any other peripherals as required for power generation tests 3.1.2 active electrode area geometric electrode area upon which an electrochemical reaction occurs Note 1 to entry: Usually this is the smaller of the anode and cathode areas. 3.1.3 current density current divided by the active electrode area 3.1.4 average repeating unit voltage cell/stack assembly unit voltage divided by the number of the cells in a series connection in the unit 3.1.5 standard temperature and pressure STP temperature of 0 °C and an absolute pressure of 101,325 kPa, respectively 3.1.6 anode gas gas that is supplied to the inlet of the anode of a single cell/stack assembly unit Note 1 to entry: Such a gas belongs to one of the following categories: a) pure hydrogen or mixture that contains hydrogen as a principal component with water vapour or nitrogen;b) c) reformed gas of raw fuel of SOFC such as methane or kerosene premixed with water vapour or air as oxidant; simulated gas of reformate that contains hydrogen, water vapour, carbon monoxide, carbon dioxide, methane, nitrogen, etc., as main components; d) methane, alcohols and other raw fuels directly supplied in pure form or mixed with water vapour and/or air. 3.1.7 cathode gas gas that is supplied to the inlet of the cathode of a single cell/stack assembly unit Note 1 to entry: Oxygen and nitrogen are its main components. 3.1.8 current collector conductive material in a fuel cell that collects electrons from the anode side or conducts electrons to the cathode side 3.1.9 stable state condition of a cell/stack assembly unit at which the unit is stable enough for any controlling parameter and the output voltage or output current of the unit to remain within its tolerance range of variation 3.1.10 theoretical current current when the supplied anode gas or cathode gas is completely consumed in electrochemical reactions divided by the number of cells in a series connection