Descrizione del progetto
Definire prove di stress accelerate per celle a combustibile a ossidi solidi ed elettrolizzatori a lungo termine
Per cella a combustibile a ossidi solidi si intende una batteria alimentata che fornisce un modo pulito ed efficiente per generare energia da combustibile. Passando alla modalità elettrolizzatore, può generare idrogeno da vapore ed elettricità. Prove di stress accelerate sollecitano deliberatamente il catalizzatore per un breve periodo di tempo per valutare la stabilità di nuovi materiali senza doverli utilizzare in una cella a combustibile operativa per un periodo a lungo termine. Il progetto AD ASTRA, finanziato dall’UE, si propone di definire protocolli di prove di stress accelerati dedotti da una comprensione sistematica dei meccanismi di degradazione in componenti invecchiati di pile di celle a ossidi solidi che funzionano sia in modalità cella a combustibile che in modalità elettrolisi. L’attenzione si concentrerà sull’affrontare i problemi degli elettrodi di combustibile e ossigeno e sulle perdite di contatto di interconnessione.
Obiettivo
AD ASTRA aims to define Accelerated Stress Testing (AST) protocols deduced from a systematic understanding of degradation mechanisms of aged components in solid oxide cell (SOC) stacks, operating in both fuel cell and electrolysis modes. In particular, fuel and oxygen electrode issues and interconnect contact loss will be tackled.
The project will build upon relevant information harvested in FCH JU projects, as well as make use of many samples taken from stacks operated in the field for thousands of hours, supplied by leading European SOC manufacturers across the two application areas CHP and P2X (combined heat&power generators and power-to-commodity energy storage).
The approach to harnessing the intricate phenomena causing critical performance degradation will be based upon a methodical analysis of in-service performance data correlated with post-operation states, augmented by a dual-focus campaign targeting macroscopic stack testing procedures as well as specific component ageing tests. The probabilistic nature of degradation will be captured by slimming down deterministic simulation models through conception and integration of stochastic correlations between (nominal/accelerated) operating conditions and degradation effects, based on statistically significant data obtained from field-tests and purposely generated experiments. Stochastic interpretation will thus serve the physical description of dominant SOFC degradation mechanisms in CHP and P2X operation, but allowing rapid estimation of remaining useful stack life.
The combined results will be translated to validated test protocols that allow quantifying and predicting degradation in SOCs as a function of test aggravation, defining appropriate transfer functions between stress-accelerating and real-world conditions. The overall project approach will be formalized for adoption by the relevant standards-developing organisations.
Campo scientifico
- natural scienceschemical scienceselectrochemistryelectrolysis
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectrical engineeringpower engineeringelectric power generationcombined heat and power
- engineering and technologyenvironmental engineeringenergy and fuelsfuel cells
Parole chiave
Programma(i)
Meccanismo di finanziamento
RIA - Research and Innovation actionCoordinatore
00196 Roma
Italia