FrançaisSolar Hydrogen Stationnary
The hydrogen systems are hybrid systems which also comprise electrochemical batteries to cover power pics
Hydrogen produced by water electrolysis for the seasonal storage
Renewable energy such as wind and PV require an electrical storage because of their intermittence and the variable amount of produced energy with the seasons.
Hydrogen is suitable for the seasonal storage with a high storage capacity in kWh (> 300 kWh). It must be coupled with electrochemical batteries such as Lead, Lithium NMC, Titanate, Iron phosphate, Lead crystal … The battery can deliver enough instantaneous power in kW for the consumers and allow to smooth the intermittence of renewable energy. To be self-sufficient over the year, the electricity converted to hydrogen by electrolysis during the sunny season can be re-used with the help of fuel cells during the winter season. Self-sufficiency of the building as well as a drastic carbon emission reduction can be obtained thanks to the introduction of PV systems coupled with Hydrogen seasonal storage.
The storage capacity to cover the energy coverage objective is roughly calculated with monthly balance and the final dimensioning must be obtained with hourly simulations.
Simulations include the modeling of producers and consumers as well as metorological data : wind, irradiation, temperature… The optimimum dimensionning is based on forecast of power and energy as well as the other criteria : security, efficiency, return on investment
Polysun simulation of building systems : PV, Storage & consumers
Tecphy Codes : Simulations of the battery cycles and hydogen cycles produced by electrolysis
Electrochemical battery for the fast storage
To have a self-sufficient building, an electrical building microgrid can be installed, comprising the Pv system, an electrochemical battery such as Lithium -NMC, Titanate, phosphate … Then algorithms allow to manage the energy flux in the building in an optimal way to maximize the self-consumption.
Microgrid of a self-consuming building with secured loads
A demonstrator of a self-sufficient building has been proposed by the Swiss Living Challenge
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