Title: The Potential of Combined Electricity and Hydrogen Generation in the Energy System: The Case of the Slovak Republic
Language: English
Authors: Weiterschütz, Ján 
Qualification level: Diploma
Advisor: Ajanovic, Amela 
Issue Date: 2020
Number of Pages: 85
Qualification level: Diploma
The European Commission announced that the 37% funding was going to be investedin the European Green Deal objectives, including one of the “lighthouse” Europeanproject – hydrogen. The deeper decarbonisation requires the broader use ofrenewable energy and renewable hydrogen. It should lead to a half capital costreduction of electrolysers in 2030. Slovakia has three problems that can be solved byhydrogen. CO2 emissions, poor air quality and problematic integration of the variablerenewable sources. Hydrogen has the potential to solve all three problems not only inSlovakia, however, globally. The main objective of this master thesis is to assess theability of a large-scale Power-to-Hydrogen plant to generate the renewable electricityto the grid, when it is needed, for the market price and to produce the renewablehydrogen, when the electricity demand is low, in order to make the renewablehydrogen commercially competitive. The synergy between the variable renewablesand the electrolysers offers production-side flexibility that allows to transform thevariable renewables to the flexible ones and to replace the fossil-based hydrogen bythe renewable one in the industry, mobility and heating. The purpose of this thesis isto provide the overview of the role of hydrogen to decarbonise the energy systems,to explain the reasons why Slovakia lags the binding renewable energy targets for2020 and to propose a hydrogen way to meet the national objectives in 2030. Thethesis also estimates the hydrogen deployment potential in Slovakia, it counts boththe current and the future demand for the renewable hydrogen and estimates theadequate capacity of the renewable energy sources needed for the renewablehydrogen production. Finally, the case study assesses a 150 MW wind farm directlysupplying the 50 MW electrolyser with the renewable electricity in three differentdemand-supply scenarios in the conditions of the south-west Slovakia. In allscenarios, the retrospective simulation is used to prove that the renewable hydrogencan be produced without subsidies under the price of € 4/kg based on the marketprices in 2019. Results show that the wind farm in the low wind conditions is profitablewithout the need of any subsidies, however, the fixed minimal price is needed to avoidmore and more often curtailments. The electrolyser can offer this minimal pricethrough the fixed electricity purchase contract. However, the electrolyser is not ableto produce hydrogen under the price of € 4/kg in any of 3 the assessed scenarios.The profitable operation without the side earnings requires a capital expendituresubsidy on electrolyser of 23% - 42% depending on the scenario.
Keywords: Hydrogen; Electrolyser; Renewables; Case; Slovakia
URI: https://doi.org/10.34726/hss.2020.86021
DOI: 10.34726/hss.2020.86021
Library ID: AC16085011
Organisation: E017 - Continuing Education Center 
Publication Type: Thesis
Appears in Collections:Thesis

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