1,722,066 research outputs found
Antonio Gramsci, Ernesto Guevara... deux moments de la philosophie de la praxis
No full textMassardo Jaime. Antonio Gramsci, Ernesto Guevara... deux moments de la philosophie de la praxis. In: L'Homme et la société, N. 130, 1998. Illusion identitaire et histoire. pp. 105-118
Les rapports entre les Etats-Unis et l'Amérique latine pendant la guerre froide
No full textMassardo Jaime. Les rapports entre les Etats-Unis et l'Amérique latine pendant la guerre froide. In: Matériaux pour l'histoire de notre temps, n°54, 1999. Regards sur l'Amérique latine 1945-1990, sous la direction de René Girault . pp. 3-8
“Todo esto fue un fracaso, un terremoto tremendo que remeció todo, desde dentro”. Una conversación con Guillermo Núñez
Full text link“Todo esto fue un fracaso, un terremoto tremendo que remeció todo, desde dentro”. Una conversación con Guillermo Núñez
(agosto de 2021 – mayo de 2023)
por Elisa Massardo
 
Design and testing of ejectors for hybrid systems
No full textServizi UNIGE per questo articolo(opens in a new window)|Richiedi articolo via Nilde(opens in a new window)|
Export
| Download | Add to List | More...
Proceedings of the 1st European Fuel Cell Technology and Applications Conference 2005 - Book of Abstracts
Volume 2005, 2005, Page 250
1st European Fuel Cell Technology and Applications Conference 2005, EFC2005; Rome; Italy; 14 December 2005 through 16 December 2005; Code 67292
Design and testing of ejectors for hybrid systems (Conference Paper)
Ferrari, M.a,
Bernardi, D.b,
Massardo, A.c
a TPG, Università di Genova, Italy
b Università di Genova, Italy
Abstract
The recent developments of hybrid systems based on Solid Oxide Fuel Cell technology have focused the attention on the advantages coming from recirculations carried out by ejectors. In fact, these components join very low costs with high lifetime because they have no moving parts. While on the anodic side an ejector allows to avoid high temperature and expensive blowers to recirculate part of the exhausted gases, on the cathodic side a recirculation based on the ejector technology is so cheap and safe to justify an efficiency decrease. To improve the ejector performance inside the hybrid systems this activity has started at TPG with a preliminary design of an anodic ejector developed using a preliminary 0-D model based on the global balances of mass, momentum and energy. Then, the theoretical activity has been improved with the development of an experimental rig to test single stage ejectors for hybrid systems at different operative conditions of mass flow rates, pressures and temperatures. At first, an open circuit has been built to perform tests at atmospheric conditions in the secondary flow and connecting the primary inlet to the compressed air line. Then, to emulate a SOFC anodic recirculation, the circuit has been closed introducing a fuel cell volume in a reduced scale. This configuration is important to test ejectors at pressurized conditions both at primary and secondary ducts. Finally, the volume has been equipped and thermally insulated to test ejectors with high temperature secondary flow, necessary to reach values in similitude condition with the real ones. This test rig has been used to validate the 0-D ejector model with the objective to set the values of the coefficients used to take into account the primary momentum loss and the mixing chamber viscous pressure losses. On the other hand, a successful comparison with the experimental data, measured with the rig, has been used to validate the CFD models necessary to better investigate the fluid dynamic phenomena inside ejectors. In fact, the application of CFD validated models has allowed to improve the performance of ejectors for hybrid systems optimizing the geometry in terms of primary and secondary ducts, mixing chamber length and diffuser geometry
High Temperature Pressurised Hybrid Systems a Key Point to Develop 60% Electrical Efficiency Power Plants Fed by Coal with CCS
No full textinvited lecture, 8th International Fuel Cell Science, Engineering & Technology Conference, ASME, New York, June
"High Temperature Fuel Cell Pressurised Hybrid Systems: Modelling, Testing and Future Developments"
No full text
"Flow Visualization and Surface Heat Transfer from Three Pass Trapezoidal Blade Cooling Passage"
No full text
Integrated Planar Solid Oxide Fuel Cell (IP-SOFC) Hybrid Systems: Design, Off-Design, Transient Modelling and Validation,
No full textINVITED LECTUR
- …
