Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Naveen K. Karri"'
Publikováno v:
International Journal of Hydrogen Energy. 47:7388-7402
A multiscale mechanistic damage model for solid oxide fuel cell (SOFC) ceramics that combines micromechanics of stiffness reduction due to material porosity change and microcracking with a continuum damage mechanics (CDM) description for the evolutio
Autor:
Changki Mo, Naveen K. Karri
Publikováno v:
Journal of Electronic Materials. 47:6101-6120
Structural reliability of thermoelectric generators (TEGs) in medium to high temperature applications still remains a challenge. Currently there are no established standards for evaluating the thermomechanical reliability of TEGs during new material
Publikováno v:
Journal of The Electrochemical Society. 168:114514
This paper applies a multiscale mechanistic damage model developed for porous brittle ceramics and implemented in finite element analysis (FEA) packages [1] to study progressive damage in solid oxide fuel cells (SOFC) subjected to thermomechanical lo
Autor:
Nathanael Royer, Naveen K Karri, Jamie D. Holladay, Jie Bao, Kerry D. Meinhardt, Lorraine Seymour, Olga A. Marina, Christopher A. Coyle, Nathan L. Canfield, Greg A. Whyatt, Charles C. Bonham
Publikováno v:
ECS Meeting Abstracts. :198-198
A research and development program is under way at the Pacific Northwest National Laboratory to develop, fabricate and demonstrate operation of an efficient solid oxide electrolyzer stack capable of producing hydrogen from steam. The focus is on redu
Autor:
Changki Mo, Naveen K. Karri
Publikováno v:
Journal of Electronic Materials. 47:3127-3135
Structural reliability of thermoelectric generation (TEG) systems still remains an issue, especially for applications such as large-scale industrial or automobile exhaust heat recovery, in which TEG systems are subject to dynamic loads and thermal cy
Autor:
Changki Mo, Naveen K. Karri
Publikováno v:
SN Applied Sciences. 1
The opposing requirements for the performance and reliability of a thermoelectric generator (TEG) are investigated with numerical finite element analysis simulations. The parameters that significantly influence the operational performance and structu
Autor:
Timothy C Droubay, Jung Pyung Choi, John S. Hardy, Nathan L. Canfield, Brian J. Koeppel, Kerry D. Meinhardt, Christopher A. Coyle, Greg A. Whyatt, Caleb A Lowrey, Naveen K Karri, Yeong-Shyung Chou, Zhijie Xu, James M. Davis, Dewei Wang, Jie Bao, Brent W. Kirby, Christopher M. Fischer, Ba N Nguyen, Jeff F. Bonnett
Publikováno v:
ECS Meeting Abstracts. :2568-2568
Pacific Northwest National Laboratory (PNNL), in collaboration with government agencies and industries, is actively engaged in the development, testing, and characterization of high efficiency, low cost modular solid oxide fuel cell power generation
Autor:
Bruce W. Arey, Liem X. Dang, B. P. McGrail, Alice Dohnalkova, Naveen K. Karri, Kyle J. Alvine, Satish K. Nune, Praveen K. Thallapally, Harsha V. R. Annapureddy, Donghai Mei, Matthew J. Olszta
Publikováno v:
ACS Applied Materials & Interfaces. 7:21712-21716
Nanoscale porous coordination polymers were synthesized using simple wet chemical method. The effect of various polymer surfactants on colloidal stability and shape selectivity was investigated. Our results suggest that the nanoparticles exhibited si
Publikováno v:
Journal of Electronic Materials. 42:1725-1736
It is highly desirable to develop technologies that recover the large amounts of waste heat generated worldwide in industrial processes, automotive transportation, diesel engine exhaust, military generators, and incinerators to increase fuel efficien
Autor:
J. Barnard, A. J. Baumann, Fei Ren, Mercouri G. Kanatzidis, Eldon D. Case, N. A. Matchanov, Jennifer E. Ni, Jonathan D'Angelo, A Morrison, Naveen K. Karri, Charles J. Cauchy, D. C. Kleinow, Timothy P. Hogan, Terry J. Hendricks
Publikováno v:
Materials Chemistry and Physics. 134:973-987
Harvesting of waste heat may lead to macrocrack and/or microcrack damage accumulation in thermoelectrics. No studies in the open literature address the thermal fatigue of any thermoelectric material. This study characterizes the thermal fatigue behav