Numerical Study on a Metal Hydride Hydrogen Compressor

Δεληγιάννης, Κωνσταντίνος; Deligiannis, Konstantinos

dc.contributor.author	Δεληγιάννης, Κωνσταντίνος	el
dc.contributor.author	Deligiannis, Konstantinos	en
dc.date.accessioned	2022-02-09T12:05:42Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/54614
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.22312
dc.rights	Default License
dc.subject	Υδρογόνο	el
dc.subject	Συμπίεση	el
dc.subject	Μεταλλοϋδρίδια	el
dc.subject	Υπολογιστική διερεύνηση	el
dc.subject	Μεταφορά μάζας και ενέργειας	el
dc.subject	Hydrogen	en
dc.subject	Compression	en
dc.subject	Metal hydrides	en
dc.subject	Numerical investigation	en
dc.subject	Energy and mass transfer	en
dc.title	Numerical Study on a Metal Hydride Hydrogen Compressor	en
dc.contributor.department	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Υπολογιστική Μηχανική”	el
heal.type	masterThesis
heal.classification	Υπολογιστική Μηχανική	el
heal.dateAvailable	2023-02-08T22:00:00Z
heal.language	en
heal.access	embargo
heal.recordProvider	ntua	el
heal.publicationDate	2020-10-26
heal.abstract	The growing global energy demand and increasing concerns about environmental pollution have made hydrogen a realistic alternative option to the traditional fossil fuels. One of the key elements on the hydrogen supply chain is high-pressure hydrogen compression systems and further research and development is required for reaching technological maturity while moving towards a large-scale hydrogen economy. Metal hydride hydrogen compressors (MHC) is a promising technology for compression of hydrogen due to their heat driven operation, absence of moving parts, compactness, safety and reliability, and the potential to utilize waste heat instead of electricity for much, if not all, of the thermal requirements of the MH containers. This study aims to numerically investigate and predict the operating characteristics of a 6-stage MHC by modeling the energy and mass transfer phenomena that take place during absorption and desorption processes upon compression cycle. A numerical time dependent model of the coupled dehydrogenation and hydrogenation process that predicts the operating conditions of the 6-stage MHC was achieved through Finite Element Analysis on Comsol Multyphysics software. Through this, the most crucial performance parameters of the 6-stage MHC were investigated. The hydrogenation/dehydrogenation fraction of metal hydrides, the transient pressure and temperature conditions and other performance characteristics such as cycle period, initial and final operation pressures of each stage were investigated and compared with experimental data. Key parameters that affect the accuracy of the results like material characteristics of Enthalpy, Entropy, Activation energy and reaction kinetic constants were highlighted and suggestions for further improvements on the numerical model were analyzed.	en
heal.advisorName	Boudouvis, Andreas	en
heal.committeeMemberName	Boudouvis, Andreas	en
heal.committeeMemberName	Stoubos, Athanasios	en
heal.committeeMemberName	Kavousanakis, Michalis	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Χημικών Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	71 σ.	el
heal.fullTextAvailability	false