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Energies
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Nonlinear Dynamics of Energy Harvesting Systems
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Nonlinear Dynamics of Energy Harvesting Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D: Energy Storage and Application".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 3155

Special Issue Editor

Dr. Krzysztof Kecik

E-Mail Website
Guest Editor
Department of Applied Mechanics, Lublin University of Technology, 20-618 Lublin, Poland
Interests: energy harvesting; control; smart materials; vibration mittigation; machining process

Special Issue Information

Dear Colleagues,

Energy harvesting from mechanical vibrations is a very promising concept, and the relevant technology is attracting significant interest due to easy access to vibration sources. As we know, the nonlinear effects play an important role in energy harvesting systems. Nonlinear energy harvesting systems are developed and improved to obtain better performances over a frequency broad range.

This Special Issue will provide the modelling and analysis of linear and nonlinear energy harvesting vibration control systems and their benefits. Moreover, this Special Issue will provide a platform for researchers to exchange ideas regarding the recent developments in energy harvesting systems and vibration control.

Topics welcome in this Special Issue include but are not limited to the following:

  • Theoretical and numerical solutions of energy harvesting systems;
  • Nonlinear effects in energy harvesting systems;
  • Experimental energy harvesting systems;
  • Vibration control and vibration mitigation by energy harvesting;
  • Energy storage.

Dr. Krzysztof Kecik
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Energy harvesting modelling
  • Nonlinear effects in energy harvesting
  • Smart materials in energy harvesting
  • Energy harvesting in biomedical aspects
  • Vibrating problems of limited power supply
  • Vibration control and vibration mitigation by energy harvesting
  • Energy storage

Published Papers (2 papers)

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Research

12 pages, 2573 KiB  
Article
Effectiveness of Energy Transfer versus Mixing Entropy in Coupled Mechanical–Electrical Oscillators
by Habilou Ouro-Koura, Zahra Sotoudeh, John Tichy and Diana-Andra Borca-Tasciuc
Energies 2022, 15(17), 6105; https://doi.org/10.3390/en15176105 - 23 Aug 2022
Cited by 2 | Viewed by 1254
Abstract
Electrostatic energy harvesters convert kinetic energy into electrical energy via variable capacitors. Efforts to improve their power output are hampered by a lack of understanding of the fundamental limit for energy conversion efficiency. In heat engines, the theoretical limit of conversion efficiency is [...] Read more.
Electrostatic energy harvesters convert kinetic energy into electrical energy via variable capacitors. Efforts to improve their power output are hampered by a lack of understanding of the fundamental limit for energy conversion efficiency. In heat engines, the theoretical limit of conversion efficiency is intrinsically related to entropy and the second law of thermodynamics. Laying the foundation for similar concepts for kinetic energy harvesters may be necessary for establishing a conversion efficiency limit. Thus, the mixing entropy concept is borrowed from statistical mechanics and is adapted here, for the first time, to characterize the energy transfer between coupled mechanical–electrical oscillators. The investigated system is composed of a spring-mass coupled to an inductance-capacitor circuit via a variable capacitor. Combining the two subsystems (electrical and mechanical) generates entropy, referred to as mixing entropy. A non-dimensional study of the governing equations of the systems and their energy terms is carried out. Trends in mixing entropy are compared with trends in the total energy of the system, assuming a conservative system, weak coupling between electrical and mechanical domains, and identical natural frequency of the two oscillators. It is found that mixing entropy can predict the peak in effectiveness of the energy transfer between the two domains. For the cases studied, the maximum mixing entropy and effectiveness values occur when the ratio of the mechanical domain energy to the total energy of the system is 67%. The maximum effectiveness is independent of the initial conditions and depends on the squared ratio of the natural frequency of the nominal coupling capacitor to the natural frequency of the mechanical system. Full article
(This article belongs to the Special Issue Nonlinear Dynamics of Energy Harvesting Systems)
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15 pages, 3156 KiB  
Article
Modification of Electromechanical Coupling in Electromagnetic Harvester
by Krzysztof Kecik
Energies 2022, 15(11), 4007; https://doi.org/10.3390/en15114007 - 30 May 2022
Cited by 5 | Viewed by 1387
Abstract
This paper focuses on the modelling and analysis of electromechanical coupling in a magnetic levitation energy harvester. A prototype harvester is built and its performance is tested with a shaker under resonance conditions. In order to modify the electromechanical coupling, a specially designed [...] Read more.
This paper focuses on the modelling and analysis of electromechanical coupling in a magnetic levitation energy harvester. A prototype harvester is built and its performance is tested with a shaker under resonance conditions. In order to modify the electromechanical coupling, a specially designed coil stack consisting of four independent coils is proposed. The configuration of the coil and the gap between them change the shape of the electromechanical coupling function. The results obtained show that the proper configuration of the modular coil allows one to modify the shape of the electromechanical coupling, increasing the recovered energy, and widens the resonance operating bandwidth. Full article
(This article belongs to the Special Issue Nonlinear Dynamics of Energy Harvesting Systems)
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