Проектирование электрической части ТЭЦ установленной мощностью 127 МВт

Объектом исследования является электрическая часть теплоэлектроцентрали. Целью работы является проектирование электрической части теплоэлектроцентрали, выбор основное силовое оборудование, выполнения расчет режима работы трансформатора, исследование вставки постоянного тока. Актуальность проектирования теплоэлектроцентрали заключается в том, что их мощность обычно такова, что может обеспечить электроэнергией город. Так же имеется возможно обеспечить город теплоснабжением.The object of the study is the electrical part of the co-generation plant. The aim of the work is the design of the electrical part of the co-generation plant, the selection of the main power equipment, the calculation of the operating mode of the transformer, the study of the high-voltage direct current link. The actuality of designing a co-generation plant is that their power is usually such that it can provide electricity to the city. It is also possible to provide the city with heat

SABRE Hyperpolarization with up to 200 bar Parahydrogen in Standard and Quickly Removable Solvents

Parahydrogen (p-H2)-based techniques are known to drastically enhance NMR signals but are usually limited by p-H2 supply. This work reports p-H2-based SABRE hyperpolarization at p-H2 pressures of hundreds of bar, far beyond the typical ten bar currently reported in the literature. A recently designed high-pressure setup was utilized to compress p-H2 gas up to 200 bar. The measurements were conducted using a sapphire high-pressure NMR tube and a 43 MHz benchtop NMR spectrometer. In standard methanol solutions, it could be shown that the signal intensities increased with pressure until they eventually reached a plateau. A polarization of about 2%, equal to a molar polarization of 1.2 mmol L−1, could be achieved for the sample with the highest substrate concentration. While the signal plateaued, the H2 solubility increased linearly with pressure from 1 to 200 bar, indicating that p-H2 availability is not the limiting factor in signal enhancement beyond a certain pressure, depending on sample composition. Furthermore, the possibility of using liquefied ethane and compressed CO2 as removable solvents for hyperpolarization was demonstrated. The use of high pressures together with quickly removable organic/non-organic solvents represents an important breakthrough in the field of hyperpolarization, advancing SABRE as a promising tool for materials science, biophysics, and molecular imaging

Virtual design bureau

В статье описывается краткая история Виртуального конструкторского бюро космического приборостроения за 5 лет его существования. В статье можно прочитать об основных, но при этом наиболее важных событиях в жизни ВКБ и кафедры точного приборостроения за этот период. ВКБ сыграло значительную роль в определении направления развитии кафедры. Самыми значимыми проектами являются создание студенческого Центра управления полетами космическими аппаратами и участие взапуске спутника "Томск-ТПУ-120".The article describes a brief 5-year history of the Virtual Design Bureau. In the article you can read about the most important events in the life of the VDB and the Department of Precision Instrument Making for this period. VDB played a significant role in determining the department development direction. The most significant projects are the creation of a student space flight control center and participation in the launch of the Tomsk-TPU-120 satellite

RASER MRI: Magnetic resonance images formed spontaneously exploiting cooperative nonlinear interaction

The spatial resolution of magnetic resonance imaging (MRI) is fundamentally limited by the width of Lorentzian point spread functions (PSF) associated with the exponential decay rate of transverse magnetization (1/T2*). Here we show a different contrast mechanism in MRI by establishing RASER (Radio-frequency Amplification by Stimulated Emission of Radiation) in imaged media. RASER imaging bursts emerge out of noise and without applying (Radio Frequency) RF pulses when placing spins with sufficient population inversion in a weak magnetic field gradient. A small difference in initial population inversion density creates a stronger image contrast than conventional MRI. This contrast is based on the cooperative nonlinear interaction between all slices. On the other hand, the cooperative nonlinear interaction gives rise to imaging artifacts, such as amplitude distortions and side lobes outside of the imaging domain. Both the contrast and the artifacts are demonstrated experimentally and predicted by simulations based on a proposed theory. This theory of RASER MRI is strongly connected to many other distinct fields related to synergetics and non-linear dynamics

Exploring synchrony and chaos of parahydrogen-pumped two-compartment radio-frequency amplification by stimulated emission of radiation

A nuclear-spin-based RASER (radio-frequency amplification by stimulated emission of radiation) is an ideal experimental system to explore nonlinear interaction phenomena of nuclear spins coupled via virtual photons to a resonator. This is due to the RASER being stable for several hours, allowing for extended observation of these phenomena. Nonlinear phenomena in multimode RASERs range from mode oscillations in synchrony, frequency shifts, frequency combs, period doublings, and even chaos. These phenomena are observed in a parahydrogen-pumped two-compartment proton RASER. In two independently pumped compartments, the separation in frequency space between the two RASER modes is precisely controlled with a magnetic field gradient. By controlling the mode separation, we can select the type of nonlinear phenomena observed. A key finding is that the ranges of mode separation where chaos and synchrony occur are very close together. The experimental results are supported by numerical simulations, based on two-mode RASER equations

RASER MRI: Magnetic resonance images formed spontaneously exploiting cooperative nonlinear interaction

The spatial resolution of magnetic resonance imaging (MRI) is limited by the width of Lorentzian point spread functions associated with the transverse relaxation rate 1/T2*. Here, we show a different contrast mechanism in MRI by establishing RASER (radio-frequency amplification by stimulated emission of radiation) in imaged media. RASER imaging bursts emerge out of noise and without applying radio-frequency pulses when placing spins with sufficient population inversion in a weak magnetic field gradient. Small local differences in initial population inversion density can create stronger image contrast than conventional MRI. This different contrast mechanism is based on the cooperative nonlinear interaction between all slices. On the other hand, the cooperative nonlinear interaction gives rise to imaging artifacts, such as amplitude distortions and side lobes outside of the imaging domain. Contrast mechanism and artifacts are explored experimentally and predicted by simulations on the basis of a proposed RASER MRI theory

Повышение энергонезависимости для комплекса экологического мониторинга природных водных объектов

В этой работе рассмотрены варианты энергонезависимости комплекса экологического мониторинга природных водных объектов. Проанализирована работа комплекса электропитания, подобрано оборудование.In this work, options for energy independence of a complex of environmental monitoring of natural water bodies are considered. The functioning of the power supply complex has been analyzed, equipment has been chosen

Значимые даты и события в истории города Юрги Кемеровской области

В данной статье впервые даётся авторский взгляд на то, кого какие даты и события можно отнести к наиболее значимым в истории города Юрги Кемеровской области. Предлагается перечень дат и событий с короткой характеристикой причины их включения. Делается вывод о малоизученности многих вопросов этой темы и её научной перспективности

Режим работы электрооборудования на тепловой станции мощностью 520 МВт

В данной выпускной квалификационной работе была спроектирована электрическая часть конденсационной электрической станции. Были рассчитаны режимы ее работы и в программе "мустанг был смоделирован самозапуск двигателей собственных нужд.In this final qualification work, the electrical part of the condensation power plant was designed. Its modes of operation were calculated and the self-launching of self-propelled engines was modeled in the Mustang program