TY - THES

T1 - A risk assessment approach for the underground storage of hydrogen, methane mixtures

AU - Steiner, Christoph

N1 - embargoed until 11-02-2020

PY - 2015

Y1 - 2015

N2 - Currently ongoing research projects examine the storage of hydrogen methane mixtures in existing underground gas storage facilities. By adding a new medium in the gas storage system might cause new risks which need to be examined in detail. The aim of this thesis was to select a risk assessment method and to create a conceptual structure for the case of hydrogen methane mixture storage in porous reservoirs. The first part of this thesis includes a literature review of topics related to the underground hydrogen storage. An overview of a planned underground hydrogen storage system and a brief description of similar projects follow as next. In addition the thesis presents a list of security threats and other potential risks for facilities, wells and reservoir. Common approaches to risk assessment are also given. Furthermore, risk assessment case studies for CO2 underground storage are introduced and similarities for hydrogen storage highlighted. The practical part of the thesis consists of creating a conceptual structure of a bow-tie analysis including the identification of hazards, consequences and barriers. Uncertainties in the system are taken into account through the use of fuzzy logic. At the end of the thesis preliminary results of research projects in the field of hydrogen underground storage are presented.

AB - Currently ongoing research projects examine the storage of hydrogen methane mixtures in existing underground gas storage facilities. By adding a new medium in the gas storage system might cause new risks which need to be examined in detail. The aim of this thesis was to select a risk assessment method and to create a conceptual structure for the case of hydrogen methane mixture storage in porous reservoirs. The first part of this thesis includes a literature review of topics related to the underground hydrogen storage. An overview of a planned underground hydrogen storage system and a brief description of similar projects follow as next. In addition the thesis presents a list of security threats and other potential risks for facilities, wells and reservoir. Common approaches to risk assessment are also given. Furthermore, risk assessment case studies for CO2 underground storage are introduced and similarities for hydrogen storage highlighted. The practical part of the thesis consists of creating a conceptual structure of a bow-tie analysis including the identification of hazards, consequences and barriers. Uncertainties in the system are taken into account through the use of fuzzy logic. At the end of the thesis preliminary results of research projects in the field of hydrogen underground storage are presented.

KW - underground hydrogen storage

KW - bow-tie

KW - hydrogen

KW - carbon capture and storage

KW - underground gas storage

KW - threats

KW - consequences

KW - barriers

KW - Delphi-study

KW - fuzzy logic

KW - unterirdische Wasserstoffspeicherung

KW - Risikoanalyse

KW - Bow-Tie

KW - Wasserstoff

KW - Kohlendioxid Abscheidung und Speicherung

KW - CCS

KW - unterirische Gasspeicherung

KW - Bedrohungen

KW - Konsequenzen

KW - Barrieren

KW - Delphi-Studie

KW - Fuzzy Logic

M3 - Master's Thesis

ER -