The Selecting of Environmentally Friendly Lighting System for Electrical Equipment Repair Shops

Waste Electronic and Electrical Equipment (WEEE) is one of the fastest growing waste streams worldwide, with significant economic value due to the precious metals contained within. Currently, only a small share of the total globally produced quantity produced is treated effectively and a large amount of valuable non-renewable resources are being wasted. Moreover, the methods currently applied in industry on a large scale are not always environmentally friendly. Thus, an economically viable and environmentally friendly method that would achieve high recovery of certain elements is sought. The objective of this paper is to assess four different organic halides as leaching agents for gold recovery from WEEE. Two of them have been previously tested (namely N-bromosuccinimide, NBS, and N-chlorosuccinimide, NCS) and have shown promising results, whereas the other two are novel and were selected due to their lower toxicity levels (trichloroisocyanuric acid, TCICA, and tribromoisocyanuric acid, TBICA). Both commercially supplied pure gold powder and WEEE dust from a recycling company were used as the gold source. Results show that from a technical standpoint, the NBS is a superior solution with both substrates, reaching 61% and 99% extraction efficiency from WEEE dust and pure gold, respectively. The other three methods recorded lower recovery efficiency (with the highest value reaching 36% for NCS, 53% for TCICA and 29% for TBICA). However, taking into account the price of gold and the expenses of the extraction process, only three of the lixiviants tested (NBS, NCS and TCICA) could be potentially profitable and viable on a larger scale.

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Alternative Environmentally Friendly Insulating Gases for SF6

Processes ◽

10.3390/pr7040216 ◽

2019 ◽

Vol 7 (4) ◽

pp. 216 ◽

Cited By ~ 7

Author(s):

Yong Wang ◽

Danqing Huang ◽

Jing Liu ◽

Yaru Zhang ◽

Lian Zeng

Keyword(s):

Global Warming ◽

Boiling Point ◽

Sulfur Hexafluoride ◽

Environmentally Friendly ◽

Electrical Equipment ◽

Climate Conditions ◽

Boiling Points ◽

High Boiling Point ◽

Insulation Performance ◽

Decomposition Properties

Sulfur hexafluoride (SF6) shows excellent insulation performance as an insulating gas. It is suitable for various climate conditions due to its low boiling point (−64 °C). Therefore, it has been widely used in power grid equipment. However, its global warming potential (GWP) is 23,500 times higher than that of CO2. Thus, it is imperative to find an environmentally friendly insulating gas with excellent insulation performance, lower GWP, and which is harmless to equipment and workers to replace SF6. In this review, four possible alternatives, including perfluorocarbons, trifluoroiodomethane, perfluorinated ketones, and fluoronitrile are reviewed in terms of basic physicochemical properties, insulation properties, decomposition properties, and compatibility with metals. The influences of trace H2O or O2 on their insulation performances are also discussed. The insulation strengths of these insulating gases were comparable to or higher than that of SF6. The GWPs of these insulating gases were lower than that of SF6. Due to their relatively high boiling point, they should be used as a mixture with buffering gases with low boiling points. Based on these four characteristics, perfluorinated ketones (C5F10O and C6F12O) and fluoronitrile (C4F7N) could partially substitute SF6 in some electrical equipment. Finally, some future needs and perspectives of environmentally friendly insulating gases are addressed for further studies.

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Brief Introduction of Heavy Industry Electrical Equipment Repair and Equipment Maintenance

10.47939/et.v2i7.132 ◽

2021 ◽

Keyword(s):

Electrical Equipment ◽

Equipment Maintenance ◽

Equipment Repair ◽

Heavy Industry

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Uji Kelayakan Minyak Biji Ketapang sebagai Bahan Isolasi Cair Transformator

DIELEKTRIKA ◽

10.29303/dielektrika.v8i1.260 ◽

2021 ◽

Vol 8 (1) ◽

pp. 21

Author(s):

I Made Ari Nrartha ◽

Julia Kamilatin ◽

Warindi Warindi

Keyword(s):

Moisture Content ◽

Water Content ◽

Seed Oil ◽

Power Transformer ◽

Environmentally Friendly ◽

Electrical Equipment ◽

Transformer Oil ◽

Test Results ◽

Insulating Material ◽

Over Time

The transformer is an electrical equipment that functions to change the voltage of alternating current from one level to another. Inside the transformer, especially the power transformer, there is transformer oil which functions as a coolant which transmits heat to the fins of the transformer as well as an arc extinguisher in case of sparks in the transformer windings. Transformer oil is generally obtained from petroleum which is decreasing over time and is less environmentally friendly so that other alternatives are needed to overcome it. This research on the feasibility of ketapang seed oil as a liquid transformer insulating material is intended to determine the feasibility of ketapang seed oil based on the permitted used transformer oil specifications (SPLN 49-1: 1982 and IEC 60296: 2012). This test is carried out by several types of tests, namely testing the moisture content, density, viscosity, and testing the oil breakdown stress. From the test results, it was obtained that the water content of ketapang seed oil was 10 mg/kg, the density value was 0,921 gram/cm3, the viscosity value was 14,665 cSt and the breakdown stress value was 68,9 kV. From these results, based on the new transformer liquid insulating oil specifications, ketapang seed oil still does not meet the standards seen from the density value of the oil.

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Sosialisasi Sistem Penerangan Listrik dan Perhitungan Tarif Listrik Tahun 2020 pada Pemuda Muhammadiyah Cabang Pulo Brayan Darat

Jurnal Nasional Pengabdian Masyarakat ◽

10.47747/pengabdiankepadamasyarakat.v1i1.122 ◽

2021 ◽

Vol 1 (1) ◽

pp. 104-108

Author(s):

Abdullah Abdullah ◽

Cholish Cholish ◽

Moh. Zainul Haq ◽

Ferdinan Rinaldo Tampubolon ◽

Rischa Devita

Keyword(s):

Energy Consumption ◽

Energy Savings ◽

Electrical Energy ◽

Electrical Equipment ◽

Public Understanding ◽

Lighting System ◽

Household Activity ◽

Household Sector ◽

Electricity Tariff

The increasing use of electrical energy in society in 2020 is closely related to the pandemic problem that is occurring. Increased household activity causes a surge in energy in the household sector. This increase in energy consumption needs to be balanced by providing exposure to the utilization of existing electrical equipment in households. The lighting system give an important role in energy consumption in the household sector. The dedication carried out is by providing knowledge on the use of the lighting system, the rules in PUIL 2000 and the calculation of the Basic Electricity Tariff (TDL) in 2020. Submission of this will certainly increase public understanding of energy savings so that it can contribute to overcoming the problem of electricity devisit occur.

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