Temperature Influence on the Performances of a PZT-5H Piezoelectric Harvester

Borzea, Claudia; Morega, Alexandru M.; Comeaga, Daniel; Veli, Yelda

doi:10.1109/atee52255.2021.9425102

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…[49] shows that an increase of temperature (from 90°C to 120°C) leads to a shift of the resonance frequency from 1167Hz to 1108Hz (5.5% frequency shift) of a PZT-based harvester. In [50], the resonance frequency shifts from 290.4Hz to 281.8Hz (3% frequency shift) when the temperature is increased from 20°C to 100°C. A shift of the resonance frequency of the harvester has the same effect than a shift of the vibration frequency: in both cases, these shifts cause a mismatch between the vibration frequency and the resonance frequency.…”

Section: Thermal Stability Aging and Vibration Frequency Shiftsmentioning

confidence: 99%

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Morel

Brenes

Gibus

et al. 2022

Smart Mater. Struct.

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The present work deals with tunable electrical interfaces able to enhance both the harvested power and bandwidth of piezoelectric vibration energy harvesters. The aim of this paper is to propose a general, normalized, and unified performance evaluation (with respect to the harvested power and bandwidth) of the various electrical strategies that can tune the harvester’s frequency response. By mean of a thorough analysis, we demonstrate how such interfaces influence the electromechanical generator response through an electrically-induced damping and an electrically-induced stiffness. The choice of the strategy determines these two electrical quantities, and thus the achievable frequency response of the system. Thereafter, we introduce a collection of graphical and analytical tools to compare and analyze single- and multi-tuning electrical strategies, including a qualitative performance evaluation of existing strategies. Finally, we establish a unified comparison of single- and multiple-tuning strategies which is supported by the definition and evaluation of a new optimization criterion. This comparison reveals which strategy performs best depending on the electromechanical coupling of the piezoelectric harvester and on the losses in the electrical interface. Furthermore, it quantifies the power and bandwidth gain brought by single- and multi-tuning strategies. Such quantitative criterion provides guidance for the choice of a harvesting strategy in any specific applicative case.

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Section: Thermal Stability Aging and Vibration Frequency Shiftsmentioning

confidence: 99%

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Morel

Brenes

Gibus

et al. 2022

Smart Mater. Struct.

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show abstract

“…However, the second peak of the less used devices is lower amplitude and not pronounced. The piezoelectric harvester employed herein has also been previously installed on a gas turbine engine in 2018, which we believe to have been the starting point of material degradation due to high temperatures (60 ÷ 80 °C) [5,25].…”

Section: Resultsmentioning

confidence: 99%

“…The temperature needs to be known before placing any piezoelectric devices, as these exhibit a significant thermal hysteresis and high temperatures are prone to cause thermal aging [24] and loss of piezoelectric properties. The lead zirconate titanate (PZT-5H) piezoelectric material of our harvesters should preferably be installed and kept around room temperature, 20 ÷ 25 °C ±10 °C [25]. As one can observe in the thermographic image, points 4 and 5 exhibit higher temperatures closer to the exhaust port, more precisely at the end section between the rotors, where high pressures and, consequently, high temperatures are met.…”

Section: Vibration Measurements and Acquired Data Analysismentioning

confidence: 99%

Vibration Analysis of a Twin-Screw Compressor as a Potential Source for Piezoelectric Energy Harvesting

SĂVESCU,

PETRESCU,

COMEAGĂ

et al. 2023

RRST-EE

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The paper presents the vibration spectra of a twin-screw compressor driven at various functioning regimes. The tests are performed to assess the potential of this rotary bladed machine as energy harvesting source. It is sought to determine the optimum spots on the compressor skid where piezoelectric harvesters can be placed, meeting the operational conditions. Like most of the industrial machinery, compressors exhibit inherent vibrations and heating during operation. The pulsatory effects of the compressed air trapped between the compressor’s male and female rotors inside the compressor also give birth to harmonics. It is important to evaluate the temperatures as well since piezoelectric harvesters should preferably operate close to room temperature so as not to deteriorate the material and avoid thermal hysteresis, which can ultimately lead to the loss of piezoelectric properties. The study herein involves acquiring vibrational data and representing it graphically as vibration spectra. An analytical model is also presented for calculating the main frequencies of the compressor, validated by the experimental data measurements. We also present laboratory tests with the piezoelectric harvester tuned near the male rotor’s frequency for achieving resonance conditions. The male rotor frequency was the most stable, with the highest amplitudes and of convenient value (~83 Hz) for the tip mass required for decreasing the piezoelectric cantilever’s resonant frequency from ~210 Hz.

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“…When the temperature was 50 • C, the output voltages of the five piezoelectric materials decreased substantially at the initial stage of loading and then restored to normal after a period of loading. Owing to the deformation and thermal expansion of the piezoelectric material induced by temperature fluctuations, unknown thermal hysteresis and nonlinear behavior occur, rendering the precise measurement of the piezoelectric response impossible [42]. To verify this phenomenon, the PZT test at 50 • C was repeated, and the probability of output failure was determined to be 83%.…”

Section: Fatigue Loading Schemementioning

confidence: 99%

Comprehensive study on fatigue degradation of road piezoelectric energy harvesters under thermal-mechanical coupling effect

Liu¹,

Duan²,

Wang³

et al. 2023

Smart Mater. Struct.

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Recent years have seen significant advancements in the field of road vibration energy harvesting using piezoelectric technology, including the watt-level road piezoelectric energy harvesters (RPEH). However, research on the fatigue life of RPEH under thermal-mechanical coupling effect is lacking. In this study, six lead zirconate titanate (PZT) block piezoelectric transducers with distinct properties were fabricated, and five transducer structures were compared. The effects of piezoelectric material properties, pavement temperature, and transducer structure on RPEH fatigue degradation were investigated using approximately 23 million mechanical loads. The findings revealed that the output power of the soft PZT was significantly greater than that of the hard PZT under low-frequency cyclic loading. However, the Curie temperature decreased with an increasing piezoelectric constant of the soft PZT. Therefore, the stability of the output voltage worsened as the ambient temperature approached half the Curie temperature. Specifically, when the ambient temperature was 50°C, the output failure phenomenon readily occurred during the initial stage of fatigue loading. By optimizing the transducer structure, the fatigue characteristics and high-temperature failure phenomenon of RPEH could be effectively improved. The coupling output modes of d33 and d31 were superior to that of the d33 mode. Among these, the drum transducer exhibited the highest output performance and operational stability across different ambient temperatures, excitation frequencies, and displacements. After six million intermittent loads over 15 days (equivalent to two years of traffic load), the output power decreased from 6.51 to 6.02 mW with a degradation rate of merely 7.53%, indicating a promising application prospect. The results provide an crucial design foundation for the entire life cycle operation of RPEH in road engineering.

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Temperature Influence on the Performances of a PZT-5H Piezoelectric Harvester

Cited by 7 publications

References 7 publications

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

A comparative study of electrical interfaces for tunable piezoelectric vibration energy harvesting

Vibration Analysis of a Twin-Screw Compressor as a Potential Source for Piezoelectric Energy Harvesting

Comprehensive study on fatigue degradation of road piezoelectric energy harvesters under thermal-mechanical coupling effect

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