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Battery aging coupled with additional loads placed on the power system of the Mola Mola AUV required that the original battery pack be replaced with a higher capacity system. A set of requirements were assembled to ensure the new pack would be electrically compatible, safe, and of appropriate configuration for AUV use. Pressure tolerant SeaSafe lithium ion modules, produced by the Southwest Electronic...
This paper presents a feasibility study on the prototyping of a hybrid EPAC (Electric Pedal Assisted Cycle) through an FC-B-UC (Fuel Cell — Battery — Ultra-Capacitors) power system. Aim of this work is the characterization of a PEMFC (Proton Exchange Membrane Fuel Cell) in order to confirm its theoretical performances and to verify the possibility of its installation on an e-bike.
Fuel starvation during PEMFC (proton exchange membrane fuel cell) operations can produce serious irreversible damages. A large over-pressure, i.e., the differential pressure between the anode and cathode, would damage the proton exchange membrane like causing pinholes and reducing the performance of PEMFC. In order to ensure the safe and stable operation of PEM fuel cell, this paper proposes a fuel...
The MPSS (multiport power supply system) is consist of fuel cell, super capacitor and two DC/DC converters. The energy management scheme, along with the allocation principle of energy storage unit is analyzed. The paper establishes the mathematical model and proposes a composite control strategy. The strategy fuses subsection PI (Proportional and Integral) control and SMC (Sliding Mode Control) based...
As solid oxide fuel cell (SOFC) systems fueled with natural gas and biogas are applied widely, the capture and utilization of CO2 in SOFC exhaust gas are important issues. This paper proposes a new SOFC system combined with a solid oxide electrolysis cell (SOEC) stack, which absorbs renewable electrical power such as solar power and wind power to convert CO2 in SOFC exhaust gas into fuel by electrolysis...
Telstra's telecommunication network covers a diverse area, which is subject to Australia's challenging environmental factors. These factors present challenges to the network and can prominently affect Telstra's remote sites, especially off-grid sites. This paper presents the key findings of using stationary fuel cells at these remote sites. The fuel cells implemented by Telstra are indirect methanol...
Modern telecommunication power supplies are based on renewable solutions, e.g. fuel cell/battery hybrid systems, for immediate and prolonged load support during grid faults. The high demand for power continuity increases the emphasis on power supply reliability and availability which raises the need for monitoring the system condition for timely maintenance and prevention of downtime. Although present...
In recent years, plasma sterilization technologies have been studied and developed remarkably. Ozone (O3) is effective and its application is extended to water purification. In general, O3 is generated with nonthermal plasma (NTP) from oxygen (O2). In this process, an extra O2 gas cylinder or an O2 supplying device is needed. It takes running and energy costs. As an alternative method, air is used...
Microbial fuel cell (MFC) is a device which can convert chemical energy into electrical energy directly, it has great utilization potentiality in the field of environmental monitoring and new energy development. The change of current is used to characterize the change of pollutant concentration. The power density of MFCs is so low and unstable that energyharvesting circuits are needed for real world...
In order to bring the simulation system closer to the actual locomotive run properties, ease to observe locomotive system response in real-time. The fuel cell hybrid locomotive system established in this paper, consists of 150 kW proton exchange membrane fuel cell (PEMFC) power generation system, DC/DC converter, battery energy store system, three-phase asynchronous traction motor, etc. And designs...
Microbial fuel cells (MFCs) are sources harvesting energy from organic matters and showing great promise in powering environmental sensors. Because of the low power and voltage issues (100μW at 0.3V for 20 cm2 electrodes), an electrical interface is required to extract the maximum power delivered by the MFC and boost the output voltage. However the switching operation of most converters induces a...
This paper presents a methodology to perform the optimal sizing of a stand-alone hybrid system. It comprises a photovoltaic generator (PV), a proton exchange membrane fuel cell (FC) generator an electrolyzer (EZ) and battery (BAT) bank as energy storage systems. In order to efficiently exploit the energy sources of the hybrid system, a suitable sizing is necessary. In this paper, a new sizing method...
In this paper, an energy management strategy in a Hybrid Electric Vehicle (HEV) is studied. This HEV is powered by a Fuel Cell (FC), and a Li-Ion battery. The FC supplies average power during the steady state and the battery furnishes the peaks of power during transient responses due to its high power density compared to the FC. This energy management, based on a fuzzy logic approach, aims to increase...
This paper is a contribution to the problem of the control of PEM Fuel Cell. More precisely, a theoretical result is proposed to prove that the oxygen excess ratio value can controlled by using a continuous state feedback. The result is established without any linearization.
As a step toward sustainable wireless sensing, we present a proof of concept system that uses a Plant Microbial Fuel Cells (PMFC) as a power source. To match the very low power production capabilities of the PMFC, we couple it with an ultra-low power wake-up receiver used as a trigger for sampling and transmission of the sensed value. We demonstrate that this combination, with a new, receiver initiated...
This paper presents a stand-alone hybrid PV/fuel cell system using single-inductor dual-input single-output (SI-DISO) boost converter. Compared to conventional hybrid power system, the proposed system significantly reduce the number of components, the system size and the corresponding cost. A model predictive control (MPC) method has been developed to control the SI-DISO boost converter to achieve...
In this paper, the control and energy management strategy are proposed for an electric vehicle (EV) application. The hybrid source is composed of Fuel Cell (FC) and Ultracapacitors (UCs). The proposed energy management is used to share the EV energy requirement between the hybrid energy source, where the UCs are connected to DC-bus through a bidirectional DC/DC converter, and the FC is linked to the...
Fuel cell is an attractive alternative to generate clean electricity for many industrial applications. This paper discusses model predictive control (MPC) of a fuel cell-based power unit (FC-PU) for vehicular applications. The MPC improves the transient response of the FC-PU. In this FC-PU, a unidirectional converter controls the current of a proton exchange membrane (PEM) fuel cell, and a bidirectional...
With the rapid developments of DC microgrid technologies and the demands of marine sustainable energy utilizations, the onboard DC microgrid becomes a new research focus. The control and Power Management Strategies (PMS) of a marine DC microgrid are two vital issues to maintain the stability, safety and efficiency of a shipboard power system. To deal with the power management problem, this paper firstly...
Owing to the energy shortage and the increasingly serious environmental pollution, fuel cell electric vehicles (FCEV) with zero-emission and high-efficiency have been expected to be the most potential candidate to substitute the conventional vehicles. The DC/DC converter is the interface between the fuel cell (FC) and the driveline of FCEV. It not only needs high voltage gain to convert the wide FC...
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