An Assessment of the Modern Wind-Power Engineering Possibilities on Territory of the Taimyr, Dolgano-Nenets and Evenk Autonomous Districts of the Krasnoyarsk Kray

В статье изложены результаты исследования энергетической составляющей населенных пунктов Таймыра и Эвенкии Красноярского края. На основе теоретического анализа полученных исследований предложена установка в удаленных населенных пунктах нетрадиционных и возобновляемых источников энергии (НВИЭ). Проведен расчет капитальных затрат и экономической эффективности ветроэнергетических установок.In the given article we present the results of our research of the power energetic component of Taimyr and Evenkiya populated localities of the Krasnoyarsk Kray. On the basis of theoretical analysis of the obtained research results we suggest to construct untraditional and renewable sources of power in remote communities (URESOP). Besides, we have made a calculation of capital expenditures and economical efficiency of the wind-electric power stations

An Assessment of the Modern Wind-Power Engineering Possibilities on Territory of the Taimyr, Dolgano-Nenets and Evenk Autonomous Districts of the Krasnoyarsk Kray

В статье изложены результаты исследования энергетической составляющей населенных пунктов Таймыра и Эвенкии Красноярского края. На основе теоретического анализа полученных исследований предложена установка в удаленных населенных пунктах нетрадиционных и возобновляемых источников энергии (НВИЭ). Проведен расчет капитальных затрат и экономической эффективности ветроэнергетических установок.In the given article we present the results of our research of the power energetic component of Taimyr and Evenkiya populated localities of the Krasnoyarsk Kray. On the basis of theoretical analysis of the obtained research results we suggest to construct untraditional and renewable sources of power in remote communities (URESOP). Besides, we have made a calculation of capital expenditures and economical efficiency of the wind-electric power stations

Distribution of D1 dislocation luminescence centers in Si+-implanted silicon and the photoluminescence model

Using step-by-step removal of silicon layers, in which dislocation-related photoluminescence is observed after Si+ (100 keV, 1·1015 cm−2) ion implantation followed by high-temperature annealing in a chlorine containing atmosphere, it has been found that a majority of dislocation-related centers of luminescence at ~1.5 μm (D1 line) is localized at the depths of Si+ ion ranges. Cross-sectional electron microscopy shows that the dislocations introduced by the implantation treatment (implantation plus annealing) penetrate to depths of ~1 μm. A phenomenological model of the D1-line dislocation-related luminescence is developed based on the assumption that the K-centers and modified A-centers located in the atmospheres of dislocations are responsible for this luminescence line. The temperature dependence of luminescence intensity calculated on the basis of the model fits well the experimental data for the D1 line

Effect of Sc, Hf, and Yb Additions on Superplasticity of a Fine-Grained Al-0.4%Zr Alloy

This research was undertaken to study the way deformation behaves in ultrafine-grained (UFG)-conducting Al-Zr alloys doped with Sc, Hf, and Yb. All in all, eight alloys were studied with zirconium partially replaced by Sc, Hf, and/or Yb. Doping elements (X = Zr, Sc, Hf, Yb) in the alloys totaled 0.4 wt.%. The choice of doping elements was conditioned by the possible precipitation of Al3X particles with L12 structure in the course of annealing these alloys. Such particles provide higher thermal stability of a nonequilibrium UFG microstructure. Initial coarse-grained samples were obtained by induction casting. A UFG microstructure in the alloys was formed by equal-channel angular pressing (ECAP) at 225 °C. Superplasticity tests were carried out at temperatures ranging from 300 to 500 °C and strain rates varying between 3.3 × 10−4 and 3.3 × 10−1 s−1. The highest values of elongation to failure are observed in Sc-doped alloys. A UFG Al-0.2%Zr-0.1%Sc-0.1%Hf alloy has maximum ductility: at 450 °C and a strain rate of 3.3 × 10−3 s−1, relative elongation to failure reaches 765%. At the onset of superplasticity, stress (σ)–strain (ε) curves are characterized by a stage of homogeneous (uniform) strain and a long stage of localized plastic flow. The dependence of homogeneous (uniform) strain (εeq) on test temperature in UFG Sc-doped alloys is increasing uniformly, which is not the case for other UFG alloys, with εeq(T) dependence peaking at 350–400 °C. The strain rate sensitivity coefficient of flow stress m is small and does not exceed 0.26–0.3 at 400–500 °C. In UFG alloys containing no Sc, the m coefficient is observed to go down to 0.12–0.18 at 500 °C. It has been suggested that lower m values are driven by intensive grain growth and pore formation in large Al3X particles, which develop specifically at an ingot crystallization stage