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Dielectric size optimization for high power density in large-scale triboelectric nanogenerators

Nano Research 2024年第9期17卷 8455-8464页

作者： Abdulkerim Karabiber ömer dirik Feyyaz Koc Faruk Ozel Department of Electrical and Electronics Engineering Bingol UniversityBingol 12000Turkey Department of Metallurgical and Materials Engineering Karamanoglu Mehmetbey UniversityKaraman 70200Turkey

Triboelectric nanogenerators(TENGs)have emerged as a promising technology to harvest electrical energy from natural motions such as human movement,wind,and water *** TENGs show significant potential in small-scale applications,developing large-scale TENGs capable of generating high power remains a significant *** factors that can affect the performance of large-scale TENGs are being investigated to overcome this challenge,including the size and configuration of dielectric *** study optimizes dielectrics regarding surface area,thickness,and multicell configuration to improve harvested electrical power density in large-scale *** the studies,glass fiber was used as the positive dielectric,and multipurpose white silicone was used as the negative dielectric because of their high tribo-potential,durability,and easy *** the size optimization phase,dielectric thicknesses and surface areas that provide the maximum power density were ***,horizontal and vertical multicell configurations were examined to efficiently integrate size-optimized *** results reveal that large-scale TENGs with vertical multicell configurations can achieve high and usable energy density for *** findings provide valuable insight into the development of large-scale TENGs with advanced power generation capabilities.

关键词： triboelectric nanogenerator dielectric layer size optimization multi-cell structure high power density

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Effects of geoclimatic factors on the variability in Pinus pinea cone, seed, and seedling traits in Turkey native habitats

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Ecological Processes 2020年第1期9卷 648-660页

作者： Safa Balekoglu Servet Caliskan Hüseyin dirik Faculty of Forestry Silviculture DepartmentIstanbul University-CerrahpasaBahcekoySariyerIstanbulTurkey

Background:Stone pine(Pinus pinea L.)is harvested for its edible *** is an important forest tree species,and also plays an important role in *** afforestation activities strongly depend on the quality of seeds and *** eastern native populations of stone pine were analyzed,in terms of their geographical and climatic parameters,in order to identify their cone,seed,pine nut,and seedling *** this regard,we aimed to contribute to the reforestation,yield,and breeding of this ***:All native populations occur in the sub-humid bioclimatic zone,according to Emberger’s bioclimatic classification,ranging 74.7-63.2 of Emberger’s Q Index value(Q),which synthesizes humidity and temperature,with lower values indicating more arid *** regard to geographical factors,altitude was found to have the greatest effect on cone diameter and seed weight,while there was a weak correlation of cone,seed,and pine nut dimension with longitude and *** terms of climatic factors,Q and mean of the maximum temperature of June,July,and August(ME)were found to be the main drivers behind significant effects in cone,seed,and pine nut morphometric *** most negative effect on seed number cone−1(r:−0.897),pine nut number cone−1(r:−0.923),pine nut yield(r:−0.903),and pine nut weight(r:−0.878)was Q,whereas cone diameter,seed length,and seed weight were positively correlated with the ME(r:0.939,r:0.889,and r:0.866,respectively).Cone and seed diameter and seed weight increased with decreasing summer drought index(r:−0.806,r:−0.846,and r:−0.866,respectively).Rainfall in the June of the third year prior to harvest time(RJ)had a negative effect on the percentage of sound seeds per *** rainfall in the third year prior to harvest time(AR)significantly affected pine nut weight(r:0.889),although rainfall during summer had a negative *** empty seed ratio of the different populations ranged from 20 to 68%,while considering

关键词： Bioclimatic zone Emberger Mediterranean Stone pine variation

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