An Analysis of the Effects of Test Bench Architecture on Solid Oxide Fuel Cell and Electrolysis Characterization and the Role of International Standards

Abstract

Reversible Solid Oxide Cell (Re-SOC) technology has attracted great interest in recent years and is considered to be one of the most promising energy conversion and storage systems. The same Re-SOC cell, can work as a power generator (SOFC) and as an electrolyser (SOEC) by simply reversing the sense of the electric current. The possibility to work in both ways guarantees multiple benefits: fuel flexibility, insignificant emissions, silent operation and affordability. These characteristics are the pillars on which this technology sustains for overriding the current power and substance generation systems in terms of flexibility, environmental sustainability and efficiency. This paper focuses on the effects of test bench system architecture characterization for Re-SOC devices. Preliminary results underline good performance and repeatability of the tested stacks, strong dependence on gas (H 2 and air) inlet temperature, strong instability effects in SOEC modes due to high steam contents and imperfect steam supply. The test results will lead to generate a set of harmonized, rigorous and user-friendly procedures for International Electrochemical Commission (IEC).