SYSTEM COMPONENTS
WIND TURBINE
The wind turbine uses wind energy to produce electricity. Vestas V82 wind turbine has a large rotor and powerful generator which makes it excellent to perform at low to medium wind conditions. Its technology ensures that the rotor gathers the maximum power from the prevailing wind while minimizing loads and controlling outputs. The turbine operates in temperatures ranging from -30 to 40 degrees Celsius. This makes it suitable to operate in Greenland.[14]
ELECTROLYSER
Electrolyser is an electrochemical system used to separate the hydrogen and oxygen molecules in water to produce hydrogen using electricity. There are three main types of electrolyser, Alkaline, PEM, and Solid oxide. For our study, we used a PEM. This Electrolyser uses a semipermeable membrane that allows proton (H+) to flow and blocks electrons. Water enters the electrolyser at the anode and when electricity is applied, the splitting occurs and the proton travels through the membrane to the cathode to produce hydrogen as seen in the figure below. The main advantage of PEM is its ability to operate effectively at high current densities and fluctuating power levels. It is suitable for intermittent renewable energy as source of power and it can operate at low temperatures unlike Alkaline which requires continuous power input and Solid oxide which operates at high temperature.[15]
HYDROGEN STORAGE
Hydrogen can be stored physically as a gas in high pressure tanks or as a liquid at cryogenic conditions. Hydrogen can also be stored as solid by adsorption or absorption. For our study we included a hydrogen tank into our system to store hydrogen as a gas at 350-700 bar using advanced and insulated fiber reinforced pressure vessels.[16]
HYDROGEN POWERED GENERATOR
This is known as a combined cycle gas turbine (CCGT). It uses both a gas turbine and steam turbine to produce electricity and the gas used as fuel is hydrogen. The power is generated at an efficiency of approximately 40%. The efficiency of the CCGT will vary with size and type of turbine selected.[17]
REFERENCES
[14] V. W. S. A/S, 8 May 2024. [Online]. Available: https://www.vestas.com/en/products/enventus-platform/V172-7-2-MW.
[15] MathWorks, "Hydrogen Electrolyzer," [Online]. Available: https://www.mathworks.com/discovery/hydrogen-electrolyzer.
[16] O. o. E. E. &. R. Energy, "Hydrogen and Fuel Cell Technologies Office," [Online]. Available: https://www.energy.gov/eere/fuelcells/hydrogen-storage .
[17] S. Incorporated, "Hydrogen in Combined Cycle," 13 April 2021. [Online]. Available: https://blog.softinway.com/hydrogen-in-combined-cycles/.