Rodriguez C.R.,Siglo 21 Business University |
Riso M.,Subsecretaria de Infraestructuras y Programas |
Jimenez Yob G.,Subsecretaria de Infraestructuras y Programas |
Ottogalli R.,Subsecretaria de Infraestructuras y Programas |
And 4 more authors.
International Journal of Hydrogen Energy | Year: 2010
The potential for hydrogen production from wind resources in the province of Córdoba, second consumer of fossil fuels for transportation in Argentina, is analyzed. Three aspects of the problem are considered: the evaluation of the hydrogen resource from wind power, the analysis of the production costs via electrolysis and the annual requirements of wind energy to generate hydrogen to fuel the vehicular transport of the province. Different scenarios were considered, including pure hydrogen as well as the so-called CNG plus, where hydrogen is mixed with compressed natural gas in a 20% V/V dilution of the former. The potential for hydrogen production from wind resources is analyzed for each department of the province, excluding those regions not suited for wind farms. The analysis takes into account the efficiency of the electrolyzer and the capacity factor of the wind power system. It is concluded that the automotive transportation could be supplied by hydrogen stemming from wind resources via electrolysis. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
Zhang Y.,ShenYang Agricultural University |
Zhang Y.,Lanzhou Jiaotong University |
Luo G.,Lanzhou Jiaotong University |
Cao Q.,Harbin Institute of Technology |
Lin M.,Air University Institute
International Journal of Non-Linear Mechanics | Year: 2014
In this paper, we examine a shallow arch model with viscous damping subjected to a sinusoidally varying central load. The system can possess more than 20 coexisting low-period periodic attractors for a given set of parameters. The large number of stable orbits yields a complex structure of closely interwoven basins of attraction, whose boundaries fill almost the whole state space. We describe the Wada basin boundaries and partially Wada basin boundaries by the mathematically rigorous method for some basins. The consequence is the existence of a high number of possible final states and the difficulty of predicting the finial states. Perturbations in such a system render uncertainty even the qualitative fate of a given initial state. © 2013 Elsevier Ltd.
Rivilli P.L.,Air University Institute |
Alarcon R.,National University of Salta |
Isasmendi G.L.,National University of Salta |
Perez J.D.,National University of Cordoba
BioResources | Year: 2012
Pyrolysis of peanut shells was carried out using stepwise isothermal fast pyrolysis (SIFP). SIFP consists of successive isothermal fast pyrolysis reactions, where solid products obtained in the previous isothermal fast pyrolysis become the substrate of the subsequent reaction at a higher temperature. This article reports results obtained from SIFP of peanut shells between 200 and 300°C using 100°C intervals under vacuum (0.2 mm). The maximum yield of liquid products was obtained at 300°C, giving around 30% of bio-oil, which contained mainly phenols and furan derivatives. On the other hand, since previous papers have reported fungicidal activity of phenols derivatives from lingo-cellulosic biomass pyrolysis, we carried out antifungal activity tests of bio oil obtained from peanut shells SIFT at 300 °C. Results seem promising, at least on Sclerotium rolfsii.
Murdoch S.,Air University Institute |
Reynoso S.,Air University Institute
IEEE Latin America Transactions | Year: 2013
This paper presents a maximum power point tracking (MPPT) circuit for an Unmanned Air Vehicle. The design of the MPPT is proposed utilizing a boost-converter topology. The power of the photovoltaic cells is monitored by a closed-loop microcontroller based control system, and the PWM signal of the boost converter continuously adjusted to extract maximum power. The MPPT is used to charge the Lithium-ion Polymer battery and feed the electrical load of the unmanned aircraft. © 2003-2012 IEEE.
Brito M.,Air University Institute |
Rodriguez S.,Air University Institute
IEEE Latin America Transactions | Year: 2013
This paper briefly describes a six degree of freedom simulator code characteristics and the nSat-IE satellite structural configuration, which fulfills two missions: data recovery and to be a technology development workbench. Besides this, this simulator will be used as a tool in order to obtain and study the results from the spacecraft orbit behavior. Two orbit simulation cases will be of paramount importance to check the code operation. It will be introduced as well a 3D satellite model (in development stage) witch take data from the simulator code in order to visualize the satellite when orbiting the earth. This 3D model is being developed using OpenGL and it will be coupled to the simulator code. © 2003-2012 IEEE.