Mathematical Simulations of Deformation for the Rotation Shells with Variable Wall Thickness

Well-posed boundary value problems are constructed for calculating rotation shells of with a stiffness variable along the meridian in two directions, and also with variable bilateral with respect to the reference surface with the shell wall thickness. Algorithms for the numerical integration of systems of differential equations with variable coefficients are discussed.Well-posed boundary value problems are constructed for calculating rotation shells of with a stiffness variable along the meridian in two directions, and also with variable bilateral with respect to the reference surface with the shell wall thickness. Algorithms for the numerical integration of systems of differential equations with variable coefficients are discussed

Управление спросом на электропотребление в России

One of the modern and effective tools for energy efficiency improvement at the level of national economies is management of the demand for electrical energy consumption. The mechanism of management of the demand for electrical energy consumption has a significant potential for energy efficiency improvement for the Russian economy, but due to structural features of the Unified Energy System of Russia, the Electrical Energy Demand Management Program is at the stage of concept development. A model of management of the demand for electrical energy consumption for Unified Energy System of Russia has been developed taking into account structural features of the electric power system. Peculiarities of the economic structure of Russia, which influence the formation of the structure of the country’s electric power complex, have been revealed. They were taken into account when developing requirements for the electrical energy demand management system in the Unified Energy System of Russia. The basic features are the multilevel form and hierarchy of the structure; they have been investigated in the process of developing the demand management model. The classification of electric power industry entities, related to processes of electric energy circulation and the influence on the management of the demand for electrical energy consumption, has been developed with economic interests of each entity within the framework of the demand management model. The electrical energy demand management model, which is based on the hierarchical structure of demand management, has been developed and covers the whole complex of management functions and takes into account features of demand management at each management level. The model allows to significantly improve the efficiency of management of the demand for electrical energy consumption, to ensure the quality of management.Одним из современных и эффективных инструментов повышения энергетической эффективности на уровне национальных экономик является управление спросом на электропотребление. Механизм управления спросом на электропотребление имеет значительный потенциал повышения энергетической эффективности для экономики России, но из‑за структурных особенностей ЕЭС России программа управления спросом на  электропотребление находится на этапе развития концепции. Разработана модель управления спросом на электропотребление для ЕЭС России с учетом структурных особенностей электроэнергетической системы. Выявлены особенности экономического устройства России, оказывающие влияние на формирование структуры электроэнергетического комплекса страны. Они учтены при разработке требований к системе управления спросом на электропотребление в ЕЭС России. Базовыми особенностями считаются многоуровневость и иерархичность структуры, они исследованы в процессе разработки модели управления спросом. Разработана классификация субъектов электроэнергетики, связанная с процессами обращения электрической энергии и влиянием на процесс управления спросом на электропотребление, с экономическими интересами каждого субъекта в рамках модели управления спросом. Разработана модель управления спросом на электропотребление, которая основана на иерархической структуре управления спросом, охватывает весь комплекс функций управления и учитывает особенности управления спросом на каждом уровне управления. Модель позволяет значительно повысить эффективность управления спросом на электропотребление, обеспечить качество управления режимами электропотребления и надежность энергоснабжения потребителей

COST-DEPENDENT ELECTRIC CONSUMPTION AS A TOOL OF RISK MANAGEMENT OF NON-PAYMENT FOR ELECTRIC ENERGY OF INDUSTRIAL ENTERPRISES

The growth of indebtedness of industrial enterprises operating in conditions of economic instability for consumed electricity and the sanctions imposed by the energy supplying organizations for late payments, determine the urgency of the problem of managing the risks of non-payment for energy from industrial enterprises. The article is devoted to the description of the method developed by the authors for managing the risks of non-payment of industrial enterprises for consumed electricity, based on the principles of price-dependent electricity consumption. Based on the study of the mechanism of formation of the cost of electricity purchased by industrial enterprises in the wholesale and retail electricity markets, special methods were proposed to control each component of the cost of electricity: electrical energy, electrical power, electricity transmission services. It justifies the need to develop options for operating modes of industrial equipment, such as nominal load mode, load limiting mode, technological minimum load, in order to effectively implement and use price-dependent power consumption in crisis conditions.Modeling scenarios of price-dependent demand management for power consumption is made on the example of a machine-building enterprise and the calculation and component-wise analysis of the economic effect of price-dependent management and the factors influencing its formation are carried out. The developed method allows you to effectively manage the risks of non-payment of industrial enterprises for electricity, as well as minimize the risks of restricting the supply of electricity to industrial facilities and disruptions in the operation of industrial equipment

Analysis of factors influencing the electricity (capacity) price growth in the energy market of the Siberian Federal District

One of the main competitive advantages of the Russian Federation in the industrial products world markets is the relatively low prices for electricity sold on the domestic market for the industry sectors. Low electricity prices for energy-intensive industrial sectors, such as ferrous and non-ferrous metallurgy, mining, oil extraction and refining, etc., allow Russian economy to occupy a dominant position in various areas of world markets, and industries are able to maintain financial stability indicators and finance modernization and technical re-equipment programs. In the fourth quarter of 2021 and the first quarter of 2022, on the territory of the Siberian United Energy System, which includes consumers of the Siberian Federal District, an increase in prices for electricity supplied to end consumers, primarily industry, was revealed. In March 2022, the increase in electricity prices compared to the same period of the previous year, in the Krasnoyarsk Krai was 18.2 %, in the Republic of Khakassia – 13.1 %. In other regions of Russia over the specified period, the increase in final electricity prices for industry averaged 2.6 %. Thus, the empirical analysis carried out in the article revealed that electricity prices in the regions of the Siberian Federal District actually began to approach the average electricity prices in other federal districts of Russia

Electric power (capacity) supply on the wholesale market for industrial consumers operating within the Siberian United Power System: dynamics of price signals changes study

One of the main goals of creating a wholesale electricity market in the Russian Federation was to reduce the prices for circulating electricity. The achievement of this goal was supposed to be due to the development of competitive energy market relations, equal access to electricity supply services to consumers among all participants of the energy market, transparency and structuring of the electricity pricing mechanism. Traditionally, the regions with the lowest prices for supplied electricity in Russia are the territories of the Siberian United Energy System, where the demand for electricity is provided by cheap hydro generation, which ensures the competitiveness of the Siberian economy and high investment potential in the industrial sector. The article presents an empirical analysis of the dynamic changes in the parameters of the total cost of electricity sold in the regions of Russia included various federal districts with a comparison of the cost of electricity in the Siberian Federal District regions with other territories of Russia, with the identification of key trends and features of changes. Analysis of the dynamics of changes in the components of the cost of electricity on various territories for the period January 2021 – March 2022 revealed a significant increase in the cost of electric energy and electric capacity. Their dynamics in some cases exceeds 30 %, and led to a significant increase in prices for electricity sold to all groups of consumers operating in the United Energy System of Siberia regions, and in particular on territories of the Krasnoyarsk Krai and the Republic of Khakassia. The presented article emphasizes the need to study the factors and pricing conditions affecting the change in price parameters for power supplied to consumers operating in the regions of the Siberian United Energy System, with the development of follow-up measures to manage the increase in prices for electricity (capacity) in these regions

Measurement of the isospin-filtering dd -> 4He K+ K- reaction at Q=39 MeV

The total cross section for the dd -> 4He K+ K- reaction has been measured at a beam momentum of 3.7 GeV/c, corresponding to an excess energy of 39 MeV, which is the maximum possible at the Cooler Synchrotron COSY-J\"{u}lich. A deuterium cluster-jet target and the ANKE forward magnetic spectrometer, placed inside the storage ring, have been employed in this investigation. We find a total cross section of sigma(tot) < 14 pb, which brings into question the viability of investigating the dd -> 4He a0(980) reaction as a means of studying isospin violation.Comment: Five pages with three eps figure

The energy dependence of the pp->K+ n Sigma+ reaction close to threshold

The production of the Sigma+ hyperon through the pp->K+nSigma+ reaction has been investigated at four energies close to threshold, 1.826, 1.920, 1.958, and 2.020 GeV. At low energies, correlated K+pi+ pairs can only originate from Sigma+ production so that their measurement allows the total cross section for the reaction to be determined. The results obtained are completely consistent with the values extracted from the study of the K+-proton correlation spectra obtained in the same experiment. These spectra, as well as the inclusive K+ momentum distributions, also provide conservative upper limits on the Sigma+ production rates. The measurements show a Sigma+ production cross section that varies roughly like phase space and, in particular, none of the three experimental approaches used supports the anomalously high near-threshold pp->K+ nSigma+ total cross section previously reported [T. Rozek et al., Phys. Lett. B 643, 251 (2006)].Comment: Submitted to PR

Kaon Pair Production in Proton--Proton Collisions

The differential and total cross sections for kaon pair production in the pp->ppK+K- reaction have been measured at three beam energies of 2.65, 2.70, and 2.83 GeV using the ANKE magnetic spectrometer at the COSY-Juelich accelerator. These near-threshold data are separated into pairs arising from the decay of the phi-meson and the remainder. For the non-phi selection, the ratio of the differential cross sections in terms of the K-p and K+p invariant masses is strongly peaked towards low masses. This effect can be described quantitatively by using a simple ansatz for the K-p final state interaction, where it is seen that the data are sensitive to the magnitude of an effective K-p scattering length. When allowance is made for a small number of phi events where the K- rescatters from the proton, the phi region is equally well described at all three energies. A very similar phenomenon is discovered in the ratio of the cross sections as functions of the K-pp and K+pp invariant masses and the identical final state interaction model is also very successful here. The world data on the energy dependence of the non-phi total cross section is also reproduced, except possibly for the results closest to threshold.Comment: 12 two-column pages, 12 figures, 1 tabl

The production of K+K- pairs in proton-proton collisions at 2.83 GeV

Differential and total cross sections for the pp -> ppK+K- reaction have been measured at a proton beam energy of 2.83 GeV using the COSY-ANKE magnetic spectrometer. Detailed model descriptions fitted to a variety of one-dimensional distributions permit the separation of the pp -> pp phi cross section from that of non-phi production. The differential spectra show that higher partial waves represent the majority of the pp -> pp phi total cross section at an excess energy of 76 MeV, whose energy dependence would then seem to require some s-wave phi-p enhancement near threshold. The non-phi data can be described in terms of the combined effects of two-body final state interactions using the same effective scattering parameters determined from lower energy data.Comment: 12 pages, 12 figures, 3 table

ЦЕНОЗАВИСИМОЕ ЭЛЕКТРОПОТРЕБЛЕНИЕ КАК ИНСТРУМЕНТ УПРАВЛЕНИЯ РИСКАМИ НЕПЛАТЕЖЕЙ ЗА ЭЛЕКТРОЭНЕРГИЮ ПРОМЫШЛЕННЫХ ПРЕДПРИЯТИЙ

The growth of indebtedness of industrial enterprises operating in conditions of economic instability for consumed electricity and the sanctions imposed by the energy supplying organizations for late payments, determine the urgency of the problem of managing the risks of non-payment for energy from industrial enterprises. The article is devoted to the description of the method developed by the authors for managing the risks of non-payment of industrial enterprises for consumed electricity, based on the principles of price-dependent electricity consumption. Based on the study of the mechanism of formation of the cost of electricity purchased by industrial enterprises in the wholesale and retail electricity markets, special methods were proposed to control each component of the cost of electricity: electrical energy, electrical power, electricity transmission services. It justifies the need to develop options for operating modes of industrial equipment, such as nominal load mode, load limiting mode, technological minimum load, in order to effectively implement and use price-dependent power consumption in crisis conditions.Modeling scenarios of price-dependent demand management for power consumption is made on the example of a machine-building enterprise and the calculation and component-wise analysis of the economic effect of price-dependent management and the factors influencing its formation are carried out. The developed method allows you to effectively manage the risks of non-payment of industrial enterprises for electricity, as well as minimize the risks of restricting the supply of electricity to industrial facilities and disruptions in the operation of industrial equipment.Рост задолженности промышленных предприятий, функционирующих в условиях экономической нестабильности за потребляемую электроэнергию, и санкции, налагаемые энергоснабжающими организациями за несвоевременные платежи, обуславливают актуальность проблемы управления рисками неплатежей за энергоресурсы со стороны промышленных предприятий. Статья посвящена описанию разработанного авторами метода управления рисками неплатежей промышленных предприятий за потребленную электроэнергию, основанного на принципах ценозависимого электропотребления. Опираясь на исследование механизма формирования стоимости электроэнергии, закупаемой промышленными предприятиями на оптовом и розничном рынках электроэнергии, были предложены специальные методы управления каждым компонентом стоимости электроэнергии: электрическая энергия, электрическая мощность, услуги по передаче электроэнергии. Обосновывается необходимость разработки вариантов режимов работы промышленного оборудования, таких, как номинальный режим нагрузки, режим ограничения нагрузки, технологический минимум нагрузки, с целью эффективного внедрения и использования ценозависимого электропотребления в кризисных условиях. Моделирование сценариев ценозависимого управления спросом на электропотребление выполнено на примере машиностроительного предприятия и осуществлен расчет и покомпонентный анализ экономического эффекта от ценозависимого управления и факторов, влияющих на его формирование. Разработанный метод позволяет эффективно управлять рисками неплатежей промышленных предприятий за электроэнергию, а также минимизировать риски ограничения подачи электроэнергии на производственные объекты и сбоев работы промышленного оборудования