Abstract

In this work, we study domestic renewable energy installations using compressed gaseous hydrogen as a storage system. The article analyzes the suitability and feasibility of this installation type considering energy, technical, and security aspects. The proposed configuration represents an alternative to the classical storage energy system in batteries, reducing dependence on grid supply for a negative balance of self-power generation to energy consumption. The hydrogen storage system is valid for any household installation, provided a specific safe place is available. Compressed hydrogen reduces the tank size but increases the risk of explosion, thus forcing us to reinforce the security measurements. The simulation run for an installation prototype shows that a hydrogen tank of 150 liters operating in the range from 0 to 70 bars, stores enough energy to maintain a null dependence on the energy grid. The system shows the advantage of having a flexible energy storage capacity, which adjusts through the tank pressure. The energy storage capacity range depends on the tank pressure tolerance, which depends on the tank material. The simulated system operates within a 25% extra capacity range, higher than any battery storage system.

Keyword: Autonomous system, energy balance, household installation, hydrogen storage, renewable energies, self-consumption

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