FCTHERM-CRO · Fuel cell stack thermal behavior
6РП — Действия „Мария Кюри“
- Период
- 2007-04-01 → 2009-03-31
- Финансиране от ЕС
- 80 000 €
- Участници
- 1
- Схема
- IRG
Линиите свързват координатора с партньорите. За проекти отпреди 2014 г. CORDIS не винаги дава точни координати. Тези точки са на ниво град или държава.
Накратко на български
Горивните клетки се анализират при различни режими на охлаждане, например при стартиране или внезапна промяна на натоварването. Това помага за определяне на правилната стратегия за контрол на температурата, за да се избегне образуването на течна вода, която влияе на работата им.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - FCTHERM-CRO (Fuel Cell Stack Thermal Behavior)
Fuel cells stacks require active cooling in order to maintain the desired temperature. The most common temperature control strategies for an air-cooled fuel cell are on-off or multi-step flow rate control of the cooling air fan. The objective of this research was to analyze the effects of different cooling strategies on stack temperature, particularly at start-up, shut down and immediately after sudden load changes. A MATLAB model was developed and used to study the steady and transient states of a fuel cell stack. A 1 kW air-cooled fuel cell stack, developed by Proton Energy Systems Inc., was used for this analysis. The analysis included stack mass and heat balance, heat transfer from the stack to cooling air and heat transfer to the surrounding air. Operation of the stack under various scenarios was simulated such as start-up from room temperature, steady state at full and half load and sudden changes of load (from full to half load), under constant or variable flow rate of cooling air. The results of these analyses and simulation show how the stack temperature changes in and between the steady states achieved at different loads and at different cooling air flow rates. In variable power mode operation, the stack temperature is not constant. It is possible to generate conditions under which spikes of liquid water are formed at the cathode outlet during transient power changes although at steady states all water may be in vapour phase. This may have significant effect on the fuel cell stack performance and must be addressed either by the stack design or by the stack temperature control strategy. This study will help in defining a proper temperature control strategy for an air-cooled PEM fuel cell stack.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
The scientific objectives of this project are to investigate thermal behaviour of a fuel cell stack during start-up, steady state and variable power performance, and shut down. More specifically, the objective is to identify spatial and temporal temperature distribution, and their effect on the stack performance. A wider objective of this project is to get Croatian engineers and researchers involved in fuel cells R&D. The proposed research will include both experimental studies and numerical modelling and simulation. In the experimental part, a 1 kW stack will be run in constant and variable power mode with intermittent start-up and shut-down.The temperatures will be measured on several strategic locations on the stack, as well as the temperatures of the gases coming in and out of the stack, including the cooling air. In addition, an infrared, high-resolution camera will be used to monitor temperature changes on the stack surface. Modelling will be conducted on several levels, namely a mass and heat balance model, a 2-D and a 3-D model of coolant air flow in a channel between the two fins, and a comprehensive 3-D model of the stack.The results of experimental measurements will be compared to the results obtained from modelling, and will be used to adjust the modelling parameters and assumptions. It is expected that information obtained on the stack's thermal behaviour will be used to:- suggest improvements in the stack design with respect to heat removal- suggest optimal operational conditions that result in best performance- suggest simplification of the fuel cell supporting system- suggest control actions and mechanisms that may lead to better stack performance.
Оригинален текст от CORDIS (на английски).
Участници
- FACULTY OF ELECTRICAL ENGINEERING, MECHANICAL ENGINEERING AND NAVAL ARCHITECTURE, SPLIT, CROATIA · SPLITКоординаторНиво градХърватия
Връзки
Данни: CORDIS, © Европейски съюз