Abstract
In this paper, a gas-to-power (GtoP) system for power outages is digitally modeled and experimentally developed. The design includes a solid-state hydrogen storage system composed of TiFeMn as a hydride forming alloy (6.7 kg of alloy in five tanks) and an air-cooled fuel cell (maximum power: 1.6 kW). The hydrogen storage system is charged under room temperature and 40 bar of hydrogen pressure, reaching about 110 g of hydrogen capacity. In an emergency use case of the system, hydrogen is supplied to the fuel cell, and the waste heat coming from the exhaust air of the fuel cell is used for the endothermic dehydrogenation reaction of the metal hydride. This GtoP system demonstrates fast, stable, and reliable responses, providing from 149 W to 596 W under different constant as well as dynamic conditions. A comprehensive and novel simulation approach based on a network model is also applied. The developed model is validated under static and dynamic power load scenarios, demonstrating excellent agreement with the experimental results.
Highlights
In today’s society, fossil fuels are increasingly becoming a problem due to their significant environmental impact; the call for alternative energy sources is becoming louder [1,2,3].The utilization of renewable energy sources is finding more and more acceptance in society and plays a crucial role in the political and economic situation [4]
Hydrogen, which can be produced from a variety of renewable energy sources, offers an efficient and clean alternative to fossil fuels
This paper investigates the application of low-temperature metal hydride (TiFeMn) to GtoP systems for stationary emergency power supply
Summary
In today’s society, fossil fuels are increasingly becoming a problem due to their significant environmental impact; the call for alternative energy sources is becoming louder [1,2,3]. As already reported in the literature, most of the experimental integrated systems (renewable energy source + electrolyzer + storage system + fuel cell) present relatively low efficiency and high costs [5]. Due to the high degree of abstraction of the component models, it is usually necessary to calibrate system parameters carefully [23] Another challenge with existing approaches for network simulation of GtoP/PtoG systems with integrated metal hydride storage is the predefined information to set the flow direction. Based on the system simulation, the overall GtoP system efficiency is optimized by investigating the most suitable parameters to utilize the waste heat of the air-cooled fuel cell as the heat supply for the desorption process of the hydride tanks
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