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Abstract

In the recent times, lot of research work carried out in the field of fuel cells explicitly divulges that it has the potential to be an ultimate power source in upcoming years. The fuel cell has more storing capacity, which enables to use in heavy power applications. In these applications, power conditioning is more vital to regulate the output voltage. Hence, we need a dc-dc converter to provide a constant regulated output voltage for such high-power system. Currently, many new converters were designed and implemented as per the requirement. This paper has made comparative study on several topologies of the quadratic high gain dc-dc converter and the applications where these topologies can be used when the fuel cell is given as a source. Also, we have compared various parameters of all the converters considered and generated the results with steady-state and dynamic study. In this article, we briefed the types of analysis carried on the dc-dc converter to study its performance. Moreover, various application of fuel cell is presented and discussed. This paper will be a handbook to the researchers who start to work on high gain dc-dc converter topologies with quadratic boost converter as a base. This article will also guide the engineers to concentrate on the fuel cell components where it needs to be explored for optimizing its operation.
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Authors and Affiliations

Divya Navamani Jayachandran
1
Jagabar Sathik
2
Tanmay Padhi
1
Aditi Kumari
1

  1. Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Kattankulathur, 603203, Chennai, India
  2. Renewable Energy Lab, Prince Sultan University,11586, Riyadh, Saudi Arabia
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Abstract

In this work we consider a problem from the field of power- and energy-aware scheduling, in which a set of batteries have to be charged in a minimum time. The formulated problem is to schedule independent and nonpreemptable jobs to minimize the schedule length, where each job requires some amount of power and consumes a certain amount of energy during its processing. We assume that the power demand of each job linearly decreases with time, as it is the case when Li-ion batteries are being charged. For the assumed job model we prove that each next job should be started as soon as the required amount of power is available. Basing on the proven theorem we formulate a procedure generating a minimum-length schedule for an assumed order of jobs. We also analyze the case of identical jobs, and show some interesting properties of this case.

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Authors and Affiliations

R. Różycki
G. Waligóra
J. Węglarz
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Abstract

This paper describes a new contactless conductivity detector, whose electrodes are constructed of microchannels filled with solution of KCl - called pseudoelectrodes. The lab-on-a-chip microdevice was fabricated in poly(dimethylsiloxane) PDMS, using a moulding technique. The mould was made from a dry negative photoresist with a thickness of 50 μm. During the tests, the dimension! and arrangement of pseudoelectrodes` microchannels were evaluated. The analyte was pumped into the microchannel using a syringe pump with a flow rate of 50 μL/min. Reproducible!changes of the signal were obtained.

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Authors and Affiliations

Karolina Blaszczyk
Michal Chudy
Zbigniew Brzózka
Artur Dybko

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