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Author
García Romañachl, Ana
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Abstract
Over the past few decades, green hydrogen has gained interest as a storage system for electricity since it is able to provide a solution for the characteristic intermittency of renewable energy sources. Additionally, it presents a lower environmental impact than current storage technologies, such as lead-acid and lithium-ion batteries, or GHG emitting energy sources, such as carbon-based fuels.
This dissertation analyzes the energetic and economic feasibility of integrating hydrogen as a storage system by creating an integrated photovoltaic-fuel cell hybrid installation for an isolated residential application. Starting from the design of a traditional photovoltaic installation, this thesis has elaborated an alternative system where almost all batteries have been replaced by a hydrogen storage design including an electrolyzer, a pressurized tank and a fuel cell. In order to reach an affordable system, due to the current high costs of hydrogen-related technologies, only a small fuel cell power has been included in the system. However, it has been proved by simulations in HOMER Pro software that the system can still cover the household demand with a lower initial capital and lifetime costs than the traditional photovoltaic installation. This design offers a step forward towards a society based on the hydrogen economy.
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