Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Christian Jeppesen"'
Autor:
Michael J. Wolff, Anton Fernando, Michael D. Smith, François Forget, Ehouarn Millour, Samuel A. Atwood, Andrew R. Jones, Mikki M. Osterloo, Ralph Shuping, Mariam Al Shamsi, Christian Jeppesen, Charles Fisher
Publikováno v:
Geophysical Research Letters, Vol 49, Iss 18, Pp n/a-n/a (2022)
Abstract Observations by the Emirates eXploration Imager (EXI) on‐board the Emirates Mars Mission are used to characterize the diurnal, seasonal, and spatial behavior of aphelion cloud belt during Mars Year 36 LS ∼ 30°–190°. Building from pre
Externí odkaz:
https://doaj.org/article/c29f0acea3144192871a124d856548e5
Autor:
Samuel Simon Araya, Fan Zhou, Simon Lennart Sahlin, Sobi Thomas, Christian Jeppesen, Søren Knudsen Kær
Publikováno v:
Energies, Vol 12, Iss 1, p 152 (2019)
In this paper, the main faults in a commercial proton exchange membrane fuel cell (PEMFC) stack for micro-combined heat and power ( μ -CHP) application are investigated, with the scope of experimentally identifying fault indicators for diagnosis pur
Externí odkaz:
https://doaj.org/article/5f4a6993348a4fa3814a0b258d4f7992
Publikováno v:
IFAC-PapersOnLine. 53:13644-13649
Incipient faults on blade load sensors can impede the sound performance of a wind turbine, leading to increasing loads over time and severe blade degradation. As such, knowledge of the blade load sensors’ health is essential for ensuring effective
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97c31f970699e8ef83e76b1cac754b49
https://doi.org/10.1016/j.ifacol.2020.12.864
https://doi.org/10.1016/j.ifacol.2020.12.864
Autor:
Sobi Thomas, Søren Knudsen Kær, Samuel Simon Araya, Thomas Steenberg, Christian Jeppesen, Jakob Rabjerg Vang
Publikováno v:
Thomas, S, Jeppesen, C, Steenberg, T, Araya, S S, Vang, J R & Kær, S K 2017, ' New load cycling strategy for enhanced durability of high temperature proton exchange membrane fuel cell ', International Journal of Hydrogen Energy, vol. 42, no. 44, pp. 27230-27240 . https://doi.org/10.1016/j.ijhydene.2017.09.018
The objective of this paper is to develop a new operational strategy to increase the lifetime of a high temperature proton exchange membrane (HT-PEMFCs) fuel cell system by using load cycling patterns to reduce the phosphoric acid loss from the fuel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a72c6314490ef37103caf90970956f07
https://doi.org/10.1016/j.ijhydene.2017.09.018
https://doi.org/10.1016/j.ijhydene.2017.09.018
Autor:
Samuel Simon Araya, Søren Knudsen Kær, Simon Lennart Sahlin, Christian Jeppesen, Søren Juhl Andreasen
Publikováno v:
Jeppesen, C, Araya, S S, Sahlin, S L, Andreasen, S J & Kær, S K 2017, ' An EIS alternative for impedance measurement of a high temperature PEM fuel cell stack based on current pulse injection ', International Journal of Hydrogen Energy, vol. 42, no. 24, pp. 15851-15860 . https://doi.org/10.1016/j.ijhydene.2017.05.066
In this paper a method for estimating the fuel cell impedance is presented, namely the current pulse injection (CPI) method, which is well suited for online implementation. This method estimates the fuel cell impedance and unlike electrochemical impe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b220b2a9170ae1acf02a57e17458b46c
https://doi.org/10.1016/j.ijhydene.2017.05.066
https://doi.org/10.1016/j.ijhydene.2017.05.066
Autor:
Pierpaolo Polverino, Simon Lennart Sahlin, Søren Knudsen Kær, Søren Juhl Andreasen, Samuel Simon Araya, Cesare Pianese, Christian Jeppesen
Publikováno v:
Jeppesen, C, Polverino, P, Andreasen, S J, Araya, S S, Sahlin, S L, Pianese, C & Kær, S K 2017, ' Impedance characterization of high temperature proton exchange membrane fuel cell stack under the influence of carbon monoxide and methanol vapor ', International Journal of Hydrogen Energy, vol. 42, no. 34, pp. 21901-21912 . https://doi.org/10.1016/j.ijhydene.2017.07.094
This work presents a comprehensive mapping of electrochemical impedance measurements under the influence of CO and methanol vapor contamination of the anode gas in a high temperature proton exchange membrane fuel cell, at varying load current. Electr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e59b2eccf5b178f657b652d56856b6b
http://hdl.handle.net/11386/4705490
http://hdl.handle.net/11386/4705490
Autor:
Fan Zhou, Jakob Rabjerg Vang, Xin Gao, Sobi Thomas, Samuel Simon Araya, Simon Lennart Sahlin, Søren Knudsen Kær, Christian Jeppesen, Vincenzo Liso
Publikováno v:
Simon Araya, S, Zhou, F, Liso, V, Sahlin, S L, Vang, J R, Thomas, S, Gao, X, Jeppesen, C & Kær, S K 2016, ' A comprehensive review of PBI-based high temperature PEM fuel cells ', International Journal of Hydrogen Energy, vol. 41, no. 46, pp. 21310-21344 . https://doi.org/10.1016/j.ijhydene.2016.09.024
The current status on the understanding of the various operational aspects of high temperature proton exchange membrane fuel cells (HT-PEMFC) has been summarized. The paper focuses on phosphoric acid-doped polybenzimidazole (PBI)-based HT-PEMFCs and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33e6aa83fe4a89d23b519446c4fcd8aa
https://vbn.aau.dk/da/publications/c59d4db2-7949-42a4-bec7-c04ff68f8bee
https://vbn.aau.dk/da/publications/c59d4db2-7949-42a4-bec7-c04ff68f8bee
Publikováno v:
IFAC-Papers
The fuel cell technologies are advancing and maturing for commercial markets. However proper diagnostic tools needs to be developed in order to insure reliability and durability of fuel cell systems. This paper presents a design of a data driven meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::458ae5f138bfae21d89e6183ce6808f2
https://hdl.handle.net/11250/2372892
https://hdl.handle.net/11250/2372892
Publikováno v:
ECS Meeting Abstracts. :2562-2562
One way of improving the durability and reliability of a fuel cell stack or system is to isolate faults within the fuel cell and perform targeted condition-based maintenance on the affected components, to remove or limit the conditions that caused th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::055c4654a80f98d458f7d938c57ae283
https://doi.org/10.1149/ma2016-02/38/2562
https://doi.org/10.1149/ma2016-02/38/2562
Publikováno v:
CONCUR'93 ISBN: 9783540572084
CONCUR
CONCUR
In top-down design of reactive systems, implicit specifications of the form C(P1, ..., Pn) sat F are often encountered, where C(P1, ..., Pn) is a system containing the (unknown) processes P1, ..., Pn, and F is a specification. We present a method for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43efdb7e3e80875f4ade8827cf58a7ac
https://doi.org/10.1007/3-540-57208-2_18
https://doi.org/10.1007/3-540-57208-2_18