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System of generation and energy storage in the form of hydrogen
The facility is located at the Sotavento Experimental Wind Farm, west of the main building. The main equipment that it is composed of is located in containers provided for this purpose. This plant comes from the need to explore energy storage systems and their potential linked to the management of renewable energies, as well as to analyze the operation and efficiency of a real plant connected to a wind farm. The objective was to obtain knowledge of the operation and the problems in a facility of this nature, with a view to transferring this knowledge and experience to future energy management plants on a larger scale. The facility has been developed jointly by the Ministry of Economy and Industry of the Government of Galicia, Natural Gas and the Sotavento Galicia Foundation.
The hydrogen plant has been operated using different strategies, all of which use electric power generated at the Sotavento Experimental Wind Farm. In a general and descriptive way, the functioning of the plant consists of a first phase of hydrogen generation, its subsequent storage and finally its combustion. The main equipment that it integrates are:
- Electrolyser. This device is produces the decoupling of the water molecule into its constituent elements, oxygen and hydrogen. The maximum generation capacity of the equipment is 60 Nm3/h of hydrogen (under normal conditions of pressure and temperature, and with a purity of 99.99%). The oxygen generated in the process is emitted into the atmosphere.
- Compressor. Equipment raising the pressure of the hydrogen generated up to 200 bar for its storage.
- Hydrogen storage system. Infrastructures that enable the build-up of generated hydrogen. The maximum storage capacity of the plant is 1,725 m3.
- Moto generator. Equipment in which electrical energy is generated as a product of the combustion of hydrogen. The electric power of the motor generator is 55 kW.
At the present time the project is complete. The technical characteristics of the equipment comprising the installation are:
|Make and Model||Hydrogenics HysSTAT-A 1000Q-60-10|
|Number of stacks/ cells||4 stacks / 90 cells per stack|
|Maximum hydrogen flow||60 Nm3/h|
|Output pressure||6-10 Bar|
|Efficiency of the electrolytic cells||4.2 kWh/Nm3|
|Maximum electrical power consumption||288 kW|
|Demineralised water consumption||< 1 l/Nm3 of H2|
|Electrolyte type||Dilution of KOH in water at 30% v/v|
|Amount of electrolyte||650 l|
|Total weight in operation||4,200 kg|
|Make and Model||Bauer HFS 15.4-13-DUO II|
|Suction pressure||2.0-4.0 Bar|
|Discharge pressure||200 Bar|
|Vacuum flow||18 Nm3/h at 2 Bar 30.9 Nm3/h at 4 Bar|
|Number of cylinders||4|
|Electrical power consumption||7.4 kW at 2 Bar 12.4 kW at 4 Bar|
|Manufacturer||Continental Energy Sistems|
|Mechanical engine power||60 kW|
|Fuel consumption||198 kW|
|Configuration||6 cylinders in a line|
|Cylinder capacity||11,700 cm3|
|Maximum hydrogen flow||70 Nm3/h|
|Supply pressure||28-60 mBar|
|Generator electrical power||55 kW|
Sotavento has a demo application, visual and interactive, allowing you to view the system data in real time and perform multiple calculations and extrapolations.