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Sustainability
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Environmental Energy Harvesting and Storage
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Environmental Energy Harvesting and Storage

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Energy Sustainability".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 8040

Special Issue Editors

Dr. Peihua Yang

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Guest Editor
School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
Interests: energy conversion and storage; printable electronic devices
Special Issues, Collections and Topics in MDPI journals
Dr. Jia Li

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Guest Editor
Rolls-Royce@NTU Corporate Lab, Nanyang Technological University, Singapore 639798, Singapore
Interests: new energy; environmental energy; water
Dr. Tianpeng Ding

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Guest Editor
Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
Interests: thermal energy harvesting; micro environmental energy harvesting; self-powered system

Special Issue Information

Dear Colleagues,

The increasing energy consumption worldwide has promoted the rapid development of advanced energy research. In a bid to address the expanding energy crisis and environmental pollution, researchers have successfully developed various environmental energy-harvesting devices, including nanogenerators, photovoltaic devices, solar steam generators, and thermoelectric devices. These energy-harvesting devices can be used in combination with advanced energy storage devices (batteries and supercapacitors) to implement a self-powered system, so that the collected energy can be stored to achieve a sustainable power supply. It is believed that such a self-powered strategy not only provides new ideas for the energy management of electronic equipment but will also further boost the prosperity of the Internet of Things.

This Special Issue focused on “Environmental Energy Harvesting and Storage” will present a broad range of topics covering the fabrication, characterization, and applications of energy storage and harvesting devices. These devices include but are not limited to metal-ion batteries, solid-state batteries, supercapacitors, metal-ion capacitors, nanogenerators, thermoelectrics, photovaltics, solar steam generators, etc. The goal is to combine energy storage and environmental energy harvesting to showcase the latest innovations and developments related to the above topics, and to use sustainable materials to open up markets and future opportunities in energy harvesting and storage fields.

We kindly invite you to submit a manuscript(s) for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Peihua Yang
Dr. Jia Li
Dr. Tianpeng Ding
Guest Editors

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. Sustainability 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 2400 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

  • batteries
  • supercapacitors
  • low-grade heat
  • thermal energy
  • solar energy
  • solar steam
  • nanogenerators
  • thermoelectrics
  • photovaltics
  • self-powered systems

Published Papers (3 papers)

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Research

17 pages, 3411 KiB  
Article
Dielectric Elastomer Generator for Electromechanical Energy Conversion: A Mini Review
by Kui Di, Kunwei Bao, Haojie Chen, Xinjun Xie, Jianbo Tan, Yixing Shao, Yongxiang Li, Wenjun Xia, Zisheng Xu and Shiju E
Sustainability 2021, 13(17), 9881; https://0-doi-org.brum.beds.ac.uk/10.3390/su13179881 - 02 Sep 2021
Cited by 22 | Viewed by 3577
Abstract
The dielectric elastomer generator (DEG) has attracted attention in converting mechanical energy into electrical energy, due to its high energy density, fast response, and light weight, which together make DEG a promising technology for electromechanical conversion. In this article, recent research papers on [...] Read more.
The dielectric elastomer generator (DEG) has attracted attention in converting mechanical energy into electrical energy, due to its high energy density, fast response, and light weight, which together make DEG a promising technology for electromechanical conversion. In this article, recent research papers on DEG are reviewed. First, we present the working principles, parameters, materials, and deformation modes of DEG. Then, we introduce DEG prototypes in the field of collecting mechanical energy, including small-scale applications for wind energy and human motion energy, and large-scale applications for wave energy. At the end of the review, we discuss the challenges and perspectives of DEG. We believe that DEG will play an important role in mechanical energy harvesting in the future. Full article
(This article belongs to the Special Issue Environmental Energy Harvesting and Storage)
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19 pages, 9338 KiB  
Article
Study of the Hydrodynamic Unsteady Flow Inside a Centrifugal Fan and Its Downstream Pipe Using Detached Eddy Simulation
by Jian-Cheng Cai, Hao-Jie Chen, Volodymyr Brazhenko and Yi-Hong Gu
Sustainability 2021, 13(9), 5113; https://0-doi-org.brum.beds.ac.uk/10.3390/su13095113 - 02 May 2021
Cited by 8 | Viewed by 1984
Abstract
The detailed unsteady turbulent flow inside a centrifugal fan and its downstream pipe was studied using detached eddy simulation (DES) at three flowrates, namely, the best efficiency point (BEP), 0.75BEP, and 1.49BEP. Both the mean and fluctuating flow fields were analyzed on the [...] Read more.
The detailed unsteady turbulent flow inside a centrifugal fan and its downstream pipe was studied using detached eddy simulation (DES) at three flowrates, namely, the best efficiency point (BEP), 0.75BEP, and 1.49BEP. Both the mean and fluctuating flow fields were analyzed on the basis of the root-mean-square value as the indication of fluctuating intensity. Results showed that the pressure fluctuation had the minimum value at BEP, but the velocity fluctuation increased with the flowrate. Most regions inside the centrifugal fan underwent large pressure fluctuation with the magnitude of about 10~20% of pref = 0.5 ρu22, where u2 is the blade velocity at the impeller outlet. The pressure fluctuation had a maximum value at the impeller side of the tongue tip rather than the stagnation point, and it decreased rapidly along the outlet pipe with magnitude about 1% of pref after distance of five pipe diameters. The spectra of hydrodynamic pressure showed conspicuous spikes at the blade passing frequency (BPF) in the volute but not in the downstream pipe. At the downstream pipe entrance, pressure fluctuation spectra agreed with experimental results, showing that hydrodynamic pressure fluctuations were dominant; however, the experimental data showed a much slower decreasing rate due to the acoustic fluctuations. Full article
(This article belongs to the Special Issue Environmental Energy Harvesting and Storage)
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10 pages, 8860 KiB  
Article
Electret Nanogenerators for Self-Powered, Flexible Electronic Pianos
by Yongjun Xiao, Chao Guo, Qingdong Zeng, Zenggang Xiong, Yunwang Ge, Wenqing Chen, Jun Wan and Bo Wang
Sustainability 2021, 13(8), 4142; https://0-doi-org.brum.beds.ac.uk/10.3390/su13084142 - 08 Apr 2021
Cited by 2 | Viewed by 1790
Abstract
Traditional electronic pianos mostly adopt a gantry type and a large number of rigid keys, and most keyboard sensors of the electronic piano require additional power supply during playing, which poses certain challenges for portable electronic products. Here, we demonstrated a fluorinated ethylene [...] Read more.
Traditional electronic pianos mostly adopt a gantry type and a large number of rigid keys, and most keyboard sensors of the electronic piano require additional power supply during playing, which poses certain challenges for portable electronic products. Here, we demonstrated a fluorinated ethylene propylene (FEP)-based electret nanogenerator (ENG), and the output electrical performances of the ENG under different external pressures and frequencies were systematically characterized. At a fixed frequency of 4 Hz and force of 4 N with a matched load resistance of 200 MΩ, an output power density of 20.6 mW/cm2 could be achieved. Though the implementation of a signal processing circuit, ENG-based, self-powered pressure sensors have been demonstrated for self-powered, flexible electronic pianos. This work provides a new strategy for electret nanogenerators for self-powered sensor networks and portable electronics. Full article
(This article belongs to the Special Issue Environmental Energy Harvesting and Storage)
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