Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.41031600279
P. Gasnier, B. Alessandri, T. Fayer, N. Garraud, E. Pauliac-Vaujour, S. Boisseau
This paper reports the design, simulation, fabrication and performances of a centimeter-scale $(emptyset=35mathrm{m}mathrm{m})$ airflow-driven harvester for autonomous Wireless Sensor Nodes (WSN). We present a model-based design tool implemented in Matlab-Simulink, which takes both computational fluid dynamics and electromagnetic fmite element simulations as inputs and we compare the simulation results with measurements for various air velocities. The harvester has a cut-in speed of 2 $mathrm{m}.mathrm{s}^{-1}$ and it is particularly efficient in the low airflow environments since its end-to-end efficiency ranges from 10.5% to 23.9% and its maximum output power from 200 $mu mathrm{W}mathrm{t}mathrm{o}3.7mathrm{m}mathrm{W}$ at 1.5 $mathrm{m}.mathrm{s}^{-1}$ and 3 $mathrm{m}.mathrm{s}^{-1}$ respectively. The propeller alone has a mechanical power coefficient ranging from 19.1% to 34% at 1.5 $mathrm{m}.mathrm{s}^{-1}$ and 3 $mathrm{m}.mathrm{s}^{-1}$ respectively. Furthermore, in the cm-scale and low airflow velocity ranges, the proposed harvester without shroud outperforms the state of the art in terms of power density and end-to-end efficiency (23.9% at 3 $mathrm{m}.mathrm{s}^{-1}$, 28% at 5 $mathrm{m}.mathrm{s}^{-1}$) and it still exhibits one of the highest performances with its shroud.
{"title":"Modelling and Characterization of a High-Efficiency, Cm-Scale and Low Velocity Airflow-Driven Harvester for Autonomous Wireless Sensor Nodes","authors":"P. Gasnier, B. Alessandri, T. Fayer, N. Garraud, E. Pauliac-Vaujour, S. Boisseau","doi":"10.1109/PowerMEMS49317.2019.41031600279","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.41031600279","url":null,"abstract":"This paper reports the design, simulation, fabrication and performances of a centimeter-scale $(emptyset=35mathrm{m}mathrm{m})$ airflow-driven harvester for autonomous Wireless Sensor Nodes (WSN). We present a model-based design tool implemented in Matlab-Simulink, which takes both computational fluid dynamics and electromagnetic fmite element simulations as inputs and we compare the simulation results with measurements for various air velocities. The harvester has a cut-in speed of 2 $mathrm{m}.mathrm{s}^{-1}$ and it is particularly efficient in the low airflow environments since its end-to-end efficiency ranges from 10.5% to 23.9% and its maximum output power from 200 $mu mathrm{W}mathrm{t}mathrm{o}3.7mathrm{m}mathrm{W}$ at 1.5 $mathrm{m}.mathrm{s}^{-1}$ and 3 $mathrm{m}.mathrm{s}^{-1}$ respectively. The propeller alone has a mechanical power coefficient ranging from 19.1% to 34% at 1.5 $mathrm{m}.mathrm{s}^{-1}$ and 3 $mathrm{m}.mathrm{s}^{-1}$ respectively. Furthermore, in the cm-scale and low airflow velocity ranges, the proposed harvester without shroud outperforms the state of the art in terms of power density and end-to-end efficiency (23.9% at 3 $mathrm{m}.mathrm{s}^{-1}$, 28% at 5 $mathrm{m}.mathrm{s}^{-1}$) and it still exhibits one of the highest performances with its shroud.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"17 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88332776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.41031607567
J. L. Scornec, B. Guiffard, R. Seveno, V. L. Cam
In this paper, we present the fabrication of piezoelectric thin film based-vibration energy harvesters with interdigitated electrodes (IDE) on a polymer substrate. The deposition of the lead zirconate titanate thin layers onto aluminium foil and the transfer onto a polymer substrate are realized using sol-gel process and a chemical method, respectively. The characteristics were studied using a bending cantilever structure under controlled oscillations. We show that harvested energy with constant acceleration is inversely proportional to the resonant frequency tuned by adding proof mass to the cantilever. For a proof mass located at 8 cm from the clamped end, a maximum power output of 127 $mu$W was obtained at 9.9 Hz against a resonance frequency of 16 Hz and a maximum power of 72 $mu$W with a mass at 4 cm. These results demonstrate the high flexibility and the potentialities of the so-called hybrid polymer/oxide micro-generator for mechanical energy harvesting from wind flow or body motion.
{"title":"Hybrid polymer/piezoelectric oxide bilayer films for low frequency energy harvesting","authors":"J. L. Scornec, B. Guiffard, R. Seveno, V. L. Cam","doi":"10.1109/PowerMEMS49317.2019.41031607567","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.41031607567","url":null,"abstract":"In this paper, we present the fabrication of piezoelectric thin film based-vibration energy harvesters with interdigitated electrodes (IDE) on a polymer substrate. The deposition of the lead zirconate titanate thin layers onto aluminium foil and the transfer onto a polymer substrate are realized using sol-gel process and a chemical method, respectively. The characteristics were studied using a bending cantilever structure under controlled oscillations. We show that harvested energy with constant acceleration is inversely proportional to the resonant frequency tuned by adding proof mass to the cantilever. For a proof mass located at 8 cm from the clamped end, a maximum power output of 127 $mu$W was obtained at 9.9 Hz against a resonance frequency of 16 Hz and a maximum power of 72 $mu$W with a mass at 4 cm. These results demonstrate the high flexibility and the potentialities of the so-called hybrid polymer/oxide micro-generator for mechanical energy harvesting from wind flow or body motion.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88435793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-01DOI: 10.1109/PowerMEMS49317.2019.92321104986
A. Kusior, P. Nieroda
This research aimed to determine the influence of the grain size of copper selenide based materials on the physicochemical properties with particular emphasis on their thermoelectric properties. Copper selenide materials were obtained via hydrothermal technique. Obtained powder were densified by the Spark Plasma Sintering (SPS) method. The morphology of the obtained materials was analyzed by scanning electron microscopy, SEM, observation. The X-ray diffraction, XRD, measurements were carried out for phase analysis. The investigations of the influence of size and phase composition on the transport properties, i.e.: electrical conductivity, the Seebeck coefficient, and the thermal conductivity were carried out in the various temperature range. Based on the theoretical and experimental research, it was being shown, that copper selenide nanomaterial exhibits improved thermoelectric parameters. The decrease of the lattice thermal conductivity effects on higher Seebeck coefficient.
{"title":"Copper selenide as a promising semiconductor for thermoelectric conversion","authors":"A. Kusior, P. Nieroda","doi":"10.1109/PowerMEMS49317.2019.92321104986","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.92321104986","url":null,"abstract":"This research aimed to determine the influence of the grain size of copper selenide based materials on the physicochemical properties with particular emphasis on their thermoelectric properties. Copper selenide materials were obtained via hydrothermal technique. Obtained powder were densified by the Spark Plasma Sintering (SPS) method. The morphology of the obtained materials was analyzed by scanning electron microscopy, SEM, observation. The X-ray diffraction, XRD, measurements were carried out for phase analysis. The investigations of the influence of size and phase composition on the transport properties, i.e.: electrical conductivity, the Seebeck coefficient, and the thermal conductivity were carried out in the various temperature range. Based on the theoretical and experimental research, it was being shown, that copper selenide nanomaterial exhibits improved thermoelectric parameters. The decrease of the lattice thermal conductivity effects on higher Seebeck coefficient.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"22 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84631659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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