Condition Monitoring of Photovoltaic Cables Based Cross-Linked Polyolefin Insulation Under Combined Accelerated Aging Stresses: Electrical and Mechanical Assessment

Afia, Ramy S. A.; Mustafa, Ehtasham; Tamus, Zoltán Ádám

doi:10.1016/j.egyr.2021.11.122

Cited by 8 publications

(7 citation statements)

References 47 publications

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“…As cable insulation is one of the largest applications for XLPE, the insulation properties of XLPE are of significance. ,,, Figure shows the electrical performance of PE-GMA and ED x . The introduction of β-hydroxy ester bonds increases the insulation of PE-GMA.…”

Section: Resultsmentioning

confidence: 99%

“…As cable insulation is one of the largest applications for XLPE, the insulation properties of XLPE are of significance. 7,37,56,57 For instance, at a high frequency (10 6 Hz), the conductivity of EDx rises to ∼10 −8 S/cm. The electrical insulation of our (LD) PE vitrimers is comparable to that reported for the highly insulating PE.…”

Section: Insulation Propertiesmentioning

confidence: 99%

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Mechanically Robust, Heat-Resistant, and Reprocessable Polyethylene Vitrimers Cross-Linked by β-Hydroxy Ester Bonds via Reactive Processing

Zhao

Mao

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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The development of vitrimers, dynamic covalent bonds cross-liked polymers via the associative exchange mechanism, offers a feasible way to address the recycling issue of traditional chemically cross-linked polyethylene (PE). However, it is still a great challenge to simultaneously achieve recyclability and high performance through a route that is environmentally friendly and easy to scale up. In this work, low-density (LD) PE vitrimers cross-linked by β-hydroxy ester bonds were successfully obtained via reactive processing between polyethylene-co-glycidyl methacrylate (PE-GMA) and decanedioic acid (DA). The high reaction efficiency of epoxy and carboxy groups leads to a high gel content of 84.51%. The activation energy (E a) of the transesterification reaction is calculated to be 111.33 kJ·mol–1. Thanks to the high E a and cross-link density, the obtained (LD) PE vitrimer exhibits a superior tensile strength of 20.41 MPa and an elongation at break of 800.16%, which is one of the highest values among the currently reported PE vitrimers fabricated by reactive processing. Moreover, the (LD) PE vitrimers have good creep resistance, heat resistance, and electrical insulation, thus showing a great potential to be used in the field of cable insulation.

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Section: Resultsmentioning

confidence: 99%

Section: Insulation Propertiesmentioning

confidence: 99%

Mechanically Robust, Heat-Resistant, and Reprocessable Polyethylene Vitrimers Cross-Linked by β-Hydroxy Ester Bonds via Reactive Processing

Zhao

Mao

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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“…Fakat TKK15 bileşiğinim birim uzama sonucu ise TKK10 bileşiğin yüzde birim uzama sonucundan daha düşük miktarda elde edilmiştir. Bu durumun sonucu çapraz bağ yoğunluk değerinin artmasıyla birlikte kauçuk temel zincir hareketliliğinin engellenmesi olarak ifade edilebilir [34,35]. Çekme testi esnasında çapraz bağ yoğunluğu fazla bileşiklerdeki bağ yapıları, çekme yönü boyunca hareketsiz kalacağından ötürü dayanım artış gösterirken süneklik değeri azalabilmektedir [36].…”

Section: şEkil 2 Kopma Ve Birim Uzama Test Sonuçlarıunclassified

Termik Santral Atığı Olan Kömür Külünün SBR Matrisli Bileşiklere İlave Edilmesinin Mekanik Özelliklere Etkisi

BULBUL,

AYHAN,

GÖKMEŞE

2023

neufmbd

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Kömür küllerinin geri dönüşümü olmadığı için doğaya atılması ciddi zararlar ortaya çıkarmaktadır. Aynı zamanda kömür külünün kimyasal bileşiminde insan ve hayvan sağlığına zararlı maddelerin olması özellikle doğal yağışlar sayesinde içme sularına karışması canlıların ve sulama yapılan tarım alanlarını ciddi şekilde tehlikeye sokmaktadır. Türkiye’de birçok termik santral bulunmaktadır. Buralardan elde edilen atıkların geri dönüştürülmesi ve ekonomiye kazandırılması büyük önem arz etmektedir. Endüstriyel atıkların polimer teknolojisi sektöründe dolgu olarak kullanılmasıyla ilgili sınırlı sayıda çalışmalar mevcuttur. Kömür külünün polimer matrisli bileşiklerde kullanılması ile ilgili hiçbir çalışma mevcut değildir. Bu çalışmada SBR matrisine %0, %5, %10 ve %15 oranında karbon siyahına ek olarak kömür külü ilave edilmiş ve 4 farklı bileşik elde dilmiştir. Elde edilen bu bileşiklerin çapraz bağ yoğunluğu hesaplanmış ve çapraz bağ yoğunluğunun mekanik özellikler üzerine etkisi araştırılmıştır. Bileşiklerdeki kömür külü dolgu oranı yükseldikçe, bileşiklerin çapraz bağ yoğunluğunun artmasına ve buna bağlı olarak, sertlik, yüzde uzama, kopma mukavemeti gibi mekanik özellikleri geliştirdiği ve özgül ağırlık gibi fiziksel özelikleri de arttırdığı görülmüştür.

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“…By executing the aging in this way, the asymmetric aging of the cable components was not affected by their different temperatures but by their different positions inside the cable cross section, causing, e.g., differences in contact with the atmosphere or the interdiffusion of additives among them. Previous studies have successfully adopted dielectric spectroscopy measurements on LV cables [21,[25][26][27][28]. Therefore, the dielectric parameters, tan δ, the capacitance, and the polarization and depolarization currents were measured after each aging cycle.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Structural Dependence of the Cyclical Thermal Aging of Low-Voltage PVC-Insulated Cables

Bal

Tamus

2023

Symmetry

Self Cite

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The increasing penetration of distributed generation sources in low-voltage distribution grids, electric vehicles, and new appliances from the consumer side can generate short repetitive overloads on the low-voltage cable network. This work investigates the change in the dielectric properties of low-voltage cable insulation caused by short-term overloads, examining how the cable structure affects the dielectric characteristics of the cable specimens in the case of cyclic short-term thermal aging. PVC-insulated low-voltage cable samples were exposed to an accelerated aging test in a temperature-controlled oven after changing their structures by removing different layers. Three aging cycles, each of six hours, were applied to the samples. After each cycle, the tan δ and capacitance were measured by an Omicron DIRANA Dielectric Response Analyzer in the laboratory at room temperature 24 ± 0.5 °C. Furthermore, the polarization and depolarization currents were also studied. The results show that changing the cable structure impacts the dielectric parameters; in particular, the effect of the belting layer is significant. From the point of view of aging, the PVC belting layer protects the diffusion of the plasticizers of the inner structure. The findings of the study show that an asymmetric aging phenomenon can be observed in different polymeric components of the cables, even though the cables were aged in an air-circulated oven ensuring a homogeneous temperature distribution in the samples.

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Condition Monitoring of Photovoltaic Cables Based Cross-Linked Polyolefin Insulation Under Combined Accelerated Aging Stresses: Electrical and Mechanical Assessment

Cited by 8 publications

References 47 publications

Mechanically Robust, Heat-Resistant, and Reprocessable Polyethylene Vitrimers Cross-Linked by β-Hydroxy Ester Bonds via Reactive Processing

Mechanically Robust, Heat-Resistant, and Reprocessable Polyethylene Vitrimers Cross-Linked by β-Hydroxy Ester Bonds via Reactive Processing

Termik Santral Atığı Olan Kömür Külünün SBR Matrisli Bileşiklere İlave Edilmesinin Mekanik Özelliklere Etkisi

Investigation of the Structural Dependence of the Cyclical Thermal Aging of Low-Voltage PVC-Insulated Cables

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