Gonzalo A. Almeida

Simon Fraser University · School of Mechatronic Systems Engineering

Fuel cell hybrid electric vehicles employ fuel cells along with batteries or ultracapacitors as power sources, and energy management systems can control their power split. This study investigates energy management strategies for lightweight plug-in extended-range fuel cell hybrid electric vehicles to optimise fuel economy, extend component lifespan...

The accessibility to freshwater is a challenge in the remote island community “Cerrito de los Morreños” in Guayaquil, Ecuador. This work aims to demonstrate the feasibility of an APS/RO/PEMWE integrated system to capture solar energy to produce freshwater and hydrogen as a byproduct. The integrated system was modeled in Matlab/Simulink to estimate...

This work proposes a novel design of the hybrid sulfur (HyS) thermochemical water-splitting cycle for hydrogen production. The hydrogen production plant is combined with a solid oxide fuel cell/gas turbine (SOFC/GT) system to satisfy the demand for the high-temperature heat from the HyS cycle by exploiting the heat loss of the SOFC stack and the de...

This study developed a thermodynamic model of a set of sulfuric acid decomposers for thermochemical hydrogen production. It was integrated with a 1 MW tubular-type solid oxide fuel cell (SOFC) stack. With the model, we evaluated the feasibility of the combined production of electric power, heat, and sulfur dioxide for thermo-chemical H2 production....

This study presents the dynamic modeling of preferential CO oxidation (CO-PROX) over a Pt-Fe/g-Al2O3 catalyst in a monolithic reactor under both adiabatic and isothermal conditions. The modeling allowed us to investigate the effects of disturbance of the inlet conditions on transient performance. This work includes a mathematical description of the...

A thermochemical method such as the sulfur-iodine (S-I) cycle and hybrid sulfur (HyS) cycle is considered as a next-generation, hydrogen production technology owing to its efficient and eco-friendly features. Catalytic decomposition of sulfuric acid (H2SO4) represents the highest endothermic step with the slowest kinetics in S-I and HyS cycle [1-3]...

A general dynamic model of monolith catalytic reactors is developed to elucidate the intricacy of the physicochemical phenomena that occur in it. The dynamic model includes microkinetic reactions on a washcoat catalyst, which is incorporated in a heat- and mass-transfer submodels based on the quasi-2D analysis of both gas- and solid-phases. To supp...

Hydrogen production by dimethyl ether steam reforming (DME-SR) integrated with carbon monoxide preferential oxidation (CO-PrOx) in a fuel processor for proton exchange membrane fuel cells (PEMFCs) in automotive applications is mathematically modeled and simulated for system control applications. Catalytic reactors have monoliths with inner surfaces...

수소와 일산화탄소를 포함한 혼합기체에 대한 촉매반응에 대한 연구가 이루어져 왔다 (1). 특히, 최근에는 수소생산을 위한 개질반응에서 생산되는 혼합기체에 포함된 일산화탄소를 선택적으로 산화시켜 수소의 순도를 높이는 목적으로 더욱 주목을 받고 있다. 수소와 일산화탄소의 산화반응은 발열반응으로서 (HCO = -283 kJ mol-1, HH2 = -242 kJ mol-1) 상대적으로 낮은 온도에서 이루어진다(2). 본 연구에서는 모노리스형 촉매반응기의Pt/Al2O3촉매상에서 수소와 일산화탄소의 선택적 산화반응을 모사하는 해석모델을 MATLAB/Simulink를 이용하여 수립하고 물질의 흡착과 탈착을 포함한 촉매반응의 과도...

디메틸에테르(Dimethyl ether, DME)는 합성연료의 일종으로서 높은 에너지밀도를 가지며 쉽게 액화가 가능하고 독성이 낮아서 다양한 화학공정에서 사용되고 있다. 디메틸에테르의 균일혼합 산화반응(homogeneous oxidation)에 대한 연구는 많이 이루어져왔으나, 이의 촉매반응에 관한 연구는 현재까지 많이 보고되고 있지 않다. 그러나, 최근에 디메틸에테르의 촉매산화반응이 높은 발열에너지와 적은 오염물질배출을 보인다는 특징으로 인해 수소생산을 위한 연료개질을 위한 반응열원 등으로 사용될 수 있다는 점에서 주목을 받고 있다. 본 연구에서는 저온형 디메틸에테르 촉매산화반응의 동적반응모델을 개발하고 MATLAB...

Prediction of the PEFC’s behavior represents an important stage of the material and efficiency improvement. In the present work, the influence of the operating temperature for a PEFC with Nafion® 112 membrane was investigated to predict its behavior, and empirical correlations based on experimental data were established. Voltage-current curves, pow...

Numerous studies have shown that Dimethyl Ether (DME) possesses several features such as non-toxicity, high energy density, easy availability, safe handling and storage, low reforming temperature, etc., that make it convenient for drivers chemical processes. Indeed, it can be easily synthesized by renewable routes. Therefore, DME could be considere...

Resumen-La contaminación, producto del desarrollo industrial y tecnológico, ha hecho necesaria la investigación en el campo de energías limpias y renovables, especialmente en el área de transporte. Las celdas de combustible es una de las tecnologías más prometedoras para aplicaciones de trasporte debido a su alta eficiencia y baja emisión de gases...

Currently, many researchers from industry and academic institutions are working on the study of electric vehicles, battery systems and renewable energy sources (solar, wind, geothermal, etc.). In order to carry out research on each of these technologies it is required large capital investment for equipment. Additionally, problems must be faced such...

El control de la generación de gases contaminantes en los procesos de fundición de metales y la reducción de las emisiones que produce la combustión de estos gases es uno de los problemas más importantes para la industria ecuatoriana. Esta requiere soluciones que permitan mantener su capacidad productiva a corto, mediano y largo plazo. El sector in...

Bipolar plate is one of the most important components of the fuel cell from the fact that it contributes the majority of the cost and weight of PEM fuel cell. Durability and cost have been the two main challenges for fuel cell technology to be used in the energy market. The term of durability is related to the ability of the PEM fuel cell to resist...

Este trabajo consiste en el diseño de una máquina desbarbadora que utiliza un sistema criogénico para la eliminación de rebabas en piezas de caucho después de un proceso de moldeo, el cual tiene como objetivo disminuir el empleo de mano obrera y evitar accidentes provocados por la manipulación de objetos cortopunzantes para realizar el desbarbado....