Processing of Non-ferrous Alloys through Extrustion

Extrusion processing is emerging as one of the impor-tant mechanical processing techniques since the last couple of decades both in terms of tonnage production and the variety of profiles. Particularly this is so in the field of aluminium alloys which are used as structurals, architectural and other engineering materials including electrical conductors. This is clear from the fact that the production of aluminium extrusions shot up from 22,000 tpy in 1980 to 62,000 tpy in 1990 and increasing at the rate of 10-15% every year. Similarly magnesium-aluminium extrusions in simple and integrated sections are being extensively used in defence and space applications because of their light weight and high strength

Performance evaluation of solar PV mini grid system in Nepal: a case study Thabang and Sugarkhal

This article investigates the performance metrics of two solar mini-grid systems, Thabang Solar Mini-Grid (TSMG) and Sugarkhal Solar Mini-Grid (SSMG), based on secondary live data, collected from Renewable Energy for Rural Livelihood (RERL) and PVsyst software 7.4 spanning the years 2021–2023. Notably, the highest irradiance levels were recorded in April for both TSMG and SSMG. TSMG exhibited an energy generation of 83.206 MWh/year in 2021 and 112.140 MWh/year in 2022, with a peak sun hour (PSH) of 5.5 h. Conversely, SSMG energy generated 64.14 MWh/year in 2021 and 68.79 MWh/year in 2022, with a PSH of 5.7 h. The capture loss of SSGM recorded 0.239 kWh/day to 3.322 kWh/day in 2021 and 0.082 kWh/day to 2.086 kWh/day in 2022. Also, the capture loss of TSGM recorded 1.573 kWh/day to 5.011 kWh/day in 2021 and 0.470 kWh/day to 4.261 kWh/day in 2023. The efficiency of SSMG is consistently higher efficiency compared to TSMG. The capture factor of SSMG increased from 9.76% in 2021 to 10.47% in 2022, while of TSMG 6.33% in 2021 to 8.53% in 2023. The findings provide valuable insights into the comparative performance of these solar mini-grid systems, contributing to the optimization and improvement of solar energy generation in diverse environmental conditions

Corrosion behaviour of rapidly solidified lead-aluminium alloys for battery grids

Rapidly solidified (RS) Pb-Al alloy in H2SO4 solution at room temperature (30 degrees C) was found to, be more corrosion resistant to that of conventional Pb-Sb alloy. Polarization curves, for RS. and as cast Pb-4Al, Pb-5Sb alloys and Pb, indicated that the critical and passive current densities were lowest in Pb-Al alloys. Further, RS alloy showed more corrosion resistant behaviour than all other alloys and metal under investigation Oxygen evolution reaction potential was not affected by aluminium addition to the lead allo

Brominated isocyanines

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