شبیه سازی و آزمایش دفع سطحی هیدروژن در یک مخزن هیدرید
Abstract
Introduction
Mathematical modeling of the interaction between the hydride tank and the fuel cell
Experimental validation of the hydride tank model
Simulation of the hydride tank-fuel cell interaction
Conclusion
References
Abstract
This paper presents a zero-dimensional (0D) model of hydride tank. The model aims to study the dynamic heat and mass transfers during desorption process in order to investigate the thermal-fluidic behaviors of this hydride tank. This proposed model has been validated experimentally thanks to a tailor-made developed test bench. This test bench allows the hydride characterization at tank scale and also the energetic characterization. The simulation results of the heat exchanges and mass transfer in and between the coupled reaction bed, show good agreement with the experimental ones. It is shown that the heat produced by a Proton Exchange Membrane Fuel Cell (PEMFC) (estimated starting from an electrical model) is enough to heat the metal alloy (FeTi) and therefore release the hydrogen with a sufficient mass flow rate to supply the PEMFC. Furthermore, the obtained results highlight the importance of the developed model for energy management of the coupling of fuel cell and hydride tank system.
Introduction
Fossil fuel reserves depletion and the adverse effects of climate change have attracted global attention and pose serious threats to mankind. The development of new energy technologies based on new materials is vital if the world is to arrest the adverse effects of climate change and secure the global energy security based on sustainable and renewable energy sources. Among the various possible solutions, hydrogen appears as a very attractive energy carrier to progressively establish itself in the economy that is today based on fossil fuels. Hydrogen has a very high energy content of 243 ½kJ=mol, which makes it a very attractive, lightweight energy carrier. Aside from being the most abundant element in the universe, hydrogen is lightweight, and can be produced from all primary resources such as fossil fuels, natural gas and coal, as well as renewable resources, such as biomass and water with input from renewable energy sources (solar, wind, wave or hydro-power …). Because hydrogen is not available anywhere as a separate element, it needs to be separated from the above mentioned sources, for which energy is necessary to do this disassociation.