Analysis of Piezoelectric Energy Harvesting Schemes and a Proposition for State-of-the-Art Approach in Hydro-Electric Power Generation

2021 ◽  
pp. 173-183
Author(s):  
Anindita Deb ◽  
Debapratim Goswami ◽  
Bishal Bhowmik ◽  
Chandana Shil Sharma ◽  
Debasish Singha ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Electric Power ◽  
State Of The Art ◽  
Piezoelectric Energy Harvesting ◽  
Electric Power Generation ◽  
Piezoelectric Energy

Development of Electric Power Measurement for Energy Harvesting Using Unimorph-Type Piezoceramics

2011 ◽  
Vol 485 ◽  
pp. 173-176 ◽  
Author(s):  
Yoshikazu Shimura ◽  
Petr Pulpan ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Satoshi Wada
Keyword(s):  
Energy Harvesting ◽  
Electric Power ◽  
Figure Of Merit ◽  
Power Measurement ◽  
Piezoelectric Energy Harvesting ◽  
Material Constants ◽  
Piezoelectric Energy ◽  
Type Device ◽  
Pulse Type ◽  
Optimum Measurement

In this study, a new electric power generation measurement system was developed for piezoelectric energy harvesting using unimorph-type piezoceramics. Relationships between electric power and material constants such as d33, d31, g31, k31, e33T/e0, s11E, Qe and Qm were investigated using various lead zirconium titanate (Pb(Zr,Ti)O3, PZT) ceramics with different material constants. Using the equipment, pulse-type stress was applied to unimorph-type piezoceramics. Then, optimum measurement conditions were determined. Under these conditions, the electric power for piezoelectric energy harvesting was measured as a function of the material constants. Finally, it was clarified that for piezoelectric energy harvesting using a unimorph-type device, the figure of merit was combination of the 3 kinds of material constants such as large d31, small e33T/e0, and large s11E.

Demonstrating the effects of elastic support on power generation and storage capability of piezoelectric energy harvesting devices

2018 ◽  
Vol 30 (2) ◽  
pp. 323-332 ◽  
Author(s):  
Mohammad Reza Zamani Kouhpanji
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Elastic Properties ◽  
Elastic Support ◽  
Physical Parameters ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Piezoelectric Beam ◽  
Energy Harvesting Devices ◽  
And Storage

This study represents effects of an elastic support on the power generation and storage capability of piezoelectric energy harvesting devices. The governing equations were derived and solved for a piezoelectric energy harvesting device made of elastic support, multilayer piezoelectric beam, and a proof mass at its free end. Furthermore, a Thevenin model for a rechargeable battery was considered for storage of the produced power of the piezoelectric energy harvesting device. Analyzing the time-domain and frequency-domain responses of the piezoelectric energy harvesting device on an elastic support shows that the elastic deformation of the support significantly reduces the power generation and storage capability of the device. It was also found that the power generation and storage capability of the piezoelectric energy harvesting device can be enhanced by choosing appropriate physical parameters of the piezoelectric beam even if the elastic properties of the support are poor relative to elastic properties of the piezoelectric beam. These results provide an insightful understanding for designing and material selection for the support in order to reach the highest possible power generation and storage capability for piezoelectric energy harvesting devices.

scholarly journals On electric power generation issues in ship electric propulsion systems

2021 ◽  
Vol 3 (397) ◽  
pp. 83-91
Author(s):  
S. Kazanov ◽  
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Electric Propulsion ◽  
State Of The Art ◽  
Power Conversion ◽  
Propulsion Systems ◽  
Electric Power Generation ◽  
Advantages And Disadvantages ◽  
Electric Power Generation Systems ◽  
Power Generation Systems

Object and purpose of research. The object and purpose of this study is generation of electric power for electric propulsion of ship and vessels; methods and problems, state-of-the-art and trend analysis are presented. Materials and methods. The main principles and methods of electric power generation using various generating and power conversion systems are briefly discussed. Their advantages and disadvantages are identified based on publication in this field. Main results. Achievements in the modern methods of power generation for ships, as well as ways of its transformation are highlighted. A detailed analysis of the state-of-the-art and trends in ship electric power generation is given. Various options of engines and generators are considered, including advanced types. Their characteristics are thoroughly analyzed based on the international publications. Conclusion. Conclusions are formulated regarding achievements and current problems in ship electric power generation systems.

Investigation of Soft and Hard Ceramics and Single Crystals for Resonant and Off-Resonant Piezoelectric Energy Harvesting

2010 ◽  
Author(s):  
Alper Erturk ◽  
Ho-Yong Lee ◽  
Daniel J. Inman
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Resonance Frequency ◽  
Single Crystals ◽  
Energy Harvester ◽  
Low Frequency ◽  
Harmonic Excitation ◽  
Resonant Excitation ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy

Piezoelectric materials have received the most attention for vibration-to-electricity conversion over the last decade. Harmonic excitation is the most commonly investigated form of excitation in piezoelectric energy harvesting and it can be divided into two subgroups as resonant and off-resonant excitations. Although resonant excitation is preferred for extracting the maximum electrical power output from the device, there are several practical cases where it is not possible to excite the energy harvester at its resonance frequency (e.g. varying frequency excitations or very low frequency excitations where the input frequency is much lower than the fundamental resonance frequency). Several researchers have used soft piezoceramics (e.g. PZT-5A and PZT-5H) for power generation under resonant excitation. Typically, these soft piezoceramics have larger piezoelectric strain constant and larger elastic compliance compared to hard piezoceramics (e.g. PZT-4 and PZT-8). However, it is known that hard piezoceramics can have an order of magnitude larger mechanical quality factor compared to soft piezoceramics. Consequently, hard piezoceramics can generate more power under resonant excitation even though researchers have mostly focused on the soft piezoceramics. On the other hand, soft piezoceramics can generate more power for low frequency excitation below the resonance frequency due to their large effective piezoelectric stress constants. This difference is also the case for soft and hard single crystals (e.g. soft PMN-PZT versus hard PMN-PZT-Mn). In addition, single crystals can generate more power than ceramics at low off-resonant frequencies due to their large dynamic flexibilities (which is related to their large elastic compliances). This work investigates the specific advantages of soft and hard piezoceramics and single crystals for vibration-based energy harvesting. An experimentally validated piezoelectric energy harvester model is used to compare the power generation performances of soft and hard ceramics as well as soft and hard single crystals. The soft and the hard piezoceramics considered in this work are PZT-5H and PZT-8, respectively, while the soft and the hard single crystals considered here are PMN-PZT and PMN-PZT-Mn, respectively.

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