IVAN SANTOS
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Artigo IPEN-doc 22701 Mathematical modeling of a 500 We power module composed by a PEM fuel cell combined with a DC-DC enhanced potential output converter2012 - SENNA, ROQUE M. de; LINARDI, MARCELO; CASSIANO, DOUGLAS A.; SANTOS, IVAN; MOTA, HENRIQUE de S.; JERONIMO, ROSIMEIRE A.This work presents the development of a mathematical modeling of a 500 We PEMFC fuel cell stack (MCC500) system combined with a dc-dc enhanced potential output converter. The MCC500 was developed at IPEN (Nuclear and Energy Research Institute) and the company Electrocell, using only Brazilian technology. Mathematical developments and modeling have been performed, relying on experimental data collected at IPEN laboratory. The first step was to prepare an electrical system (pre-design) for the proposed model, which included the MCC500 parameters, like: membrane ohmic resistance, activation resistance, electric double layer capacitance, open circuit potential, as well as DC-DC converter parameters, like: inductor and transistor switching frequency. Using the obtained parameters and a linear differential equation system with some mathematical manipulations, an electrical system model was determined. Simulations experiments demonstrated that the system was very stable. This toll contribution showed to be very important to generate useful potential for practical purposes, increasing the overall system electrical efficiency.Artigo IPEN-doc 15804 Estudo do potencial da casca de castanha de caju para obtencao de hidrogenio2010 - TAVARES, BEATRIZ G.; LINARDI, MARCELO; SANTOS, IVAN; EGUTE, NAYARA dos S.; ORSINI, ROSELY dos R.; CARVALHO, FATIMA M.S. deArtigo IPEN-doc 16917 ABNT NBR ISO 26000 strategic planning in peaceful use of nuclear energy2011 - BIAZINI FILHO, FRANCISCO L.; SORDI, GIAN MARIA; SANTOS, IVAN; SAHYUN, ADELIA; GHOBRIL, CARLOSArtigo IPEN-doc 16847 Radioprotection aspects in site selection for installations of new power reactors in Brazil2011 - SAHYUN, ADELIA; SORDI, GIAN MARIA; GHOBRIL, C.N.; SANTOS, IVAN; BIAZINI FILHO, FRANCISCO L.