Tver State Technical University
Tver, Russia
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Burdo G.B.,Tver State Technical University
Russian Engineering Research | Year: 2017

Means of faster and better technological preparation for multiproduct manufacturing are considered. The possibility of technological preparation in parallel with design and organizational preparation is demonstrated. An approach to organizational and technological design in the development of manufacturing processes is proposed. In this approach, the dynamics and goals of production systems are taken into account. A timeline for the introduction of the proposed approach is outlined, and the conditions for its successful implementation are specified. © 2017, Allerton Press, Inc.

Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP.2013.1.1-1 | Award Amount: 12.34M | Year: 2013

BIO-GO-For-Production is a Large Scale Collaborative Research Project that aims to achieve a step change in the application of nanocatalysis to sustainable energy production through an integrated, coherent and holistic approach utilizing novel heterogeneous nanoparticulate catalysts in fuel syntheses. BIO-GO researches and develops advanced nanocatalysts, which are allied with advanced reactor concepts to realise modular, highly efficient, integrated processes for the production of fuels from renewable bio-oils and biogas. Principal objectives are to develop new designs, preparation routes and methods of coating nanocatalysts on innovative micro-structured reactor designs, enabling compact, integrated catalytic reactor systems that exploit fully the special properties of nanocatalysts to improve process efficiency through intensification. An important aim is to reduce the dependence on precious metals and rare earths. Catalyst development is underpinned by modelling, kinetic and in-situ studies, and is validated by extended laboratory runs of biogas and bio-oil reforming, methanol synthesis and gasoline production to benchmark performance against current commercial catalysts. The 4-year project culminates in two verification steps: (a) a 6 month continuous pilot scale catalyst production run to demonstrate scaled up manufacturing potential for fast industrialisation (b) the integration at miniplant scale of the complete integrated process to gasoline production starting from bio-oil and bio-gas feedstocks. A cost evaluation will be carried out on the catalyst production while LCA will be undertaken to analyse environmental impacts across the whole chain. BIO-GO brings together a world class multi-disciplinary team from 15 organisations to carry out the ambitious project, the results of which will have substantial strategic, economic and environmental impacts on the EU petrochemicals industry and on the increasing use of renewable feedstock for energy.

Misnikov O.,Tver State Technical University | Ivanov V.,Tver State Technical University
E3S Web of Conferences | Year: 2017

The article deals with the issue of gypsum binder quality reduction during its storage and transportation. The study provides the main methods to protect gypsum from unauthorized exposure to moisture and water vapor. The author proposes hydrophobic modification as a perspective method for the preservation of gypsum activity and its water absorption reduction. The substantiation of cement hydrophobization with the bitumen released during peat thermolysis is provided. The author proposes to use this method in the technology of gypsum binder production. The basic idea is to combine the hydrophobization process with the calcination of calcium sulfate dehydrate. This is facilitated by temperature ranges used for dehydration of natural gypsum and the initial stage of thermal decomposition of the organic matter of peat. The author defined experimentally an optimal concentration of the organic component in gypsum binder. After adding 0.5-1% of the peat additive, the gypsum plaster preserved its grade strength and increased its storage time without caking and hydration, also under adverse conditions. The proposed method is adapted to the technological processes presently used in the production and doesn't require changing any equipment. The price of mineral raw materials and semi-finished products of peat are approximately equal which reduces the probability of increasing of the cost of hydrophobically modified gypsum binder. © The Authors, published by EDP Sciences, 2017.

Lebedev V.,Tver State Technical University | Puhova O.,Tver State Technical University
E3S Web of Conferences | Year: 2017

The article examines the software development of peat briquette production. Integrated peat development is one of the important tasks of peat industry. The importance of peat as local raw material increases with the increase in demand for various products. The production efficiency can be improved with new automated peat processing technologies based on advanced engineering. In view of market and technology requirements the peat industry development is hampered by slow development of automated peat processing and utilization technologies. The acceleration of technological progress can be achieved by designing automated lines of advanced peat processing. In accordance with this mission the development of technological process monitoring parameters is of great importance thanks to the possibility of end product physicochemical properties being predicted and managed to make efficient use of peat products for energy needs. The software with an intuitive interface for automated production line of peat briquettes has been developed. This provides means for managing and controlling the peat briquette production process. © The Authors, published by EDP Sciences, 2017.

Vinogradov G.P.,Tver State Technical University
Journal of Physics: Conference Series | Year: 2017

The problem of constructing a choice model of an agent with endogenous purposes of evolution is under debate. It is demonstrated that its solution requires the development of well-known methods of decision-making while taking into account the relation of action mode motivation to an agent's ambition to implement subjectively understood interests and the environment state. The latter is submitted for consideration as a purposeful state situation model that exists only in the mind of an agent. It is the situation that is a basis for getting an insight into the agent's ideas on the possible selected action mode results. The agent's ambition to build his confidence in the feasibility of the action mode and the possibility of achieving the desired state requires him to use the procedures of forming an idea model based on the measured values of environment state. This leads to the gaming approach for the choice problem and its solution can be obtained on a set of trade-off alternatives.

Makarov A.N.,Tver State Technical University
Metallurgist | Year: 2017

Results are provided for calculating arc efficiency of steel-smelting arc furnaces in various stages of charge melting with a change in slag layer thickness. Arc efficiency is at a maximum after cutting a well in a charge. Charge thickness decreases during melting and arc efficiency is reduced. An increase in slag layer thickness in the opening period leads to an increase in arc efficiency. Calculated data are confirmed by experimental studies in steel melting arc furnaces. © 2017 Springer Science+Business Media, LLC

Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP-2009-3.2-1 | Award Amount: 10.03M | Year: 2010

POLYCAT provides an integrated, coherent and holistic approach utilizing novel polymer based nanoparticulate catalysts in pharmaceutical, crop protection and vitamin syntheses in conjunction with the enabling functions of micro process technology and green solvents such as water or ethyl lactate. This provides a discipline bridging approach between fine chemistry, catalysis and engineering. This will lead to the replacement of a number of chemical or microbiological reaction steps in fine chemical syntheses by catalytic ones using more active, selective and stable nanoparticulate catalysts. In addition, POLYCAT will lead to the development of novel chiral modifiers immobilized on the polymeric supports. Micro process technology provides testing under almost ideal processing conditions, with much improved heat management, with improved costing, at high data validity, at high process confidence, and with high certainty for scale-out. The industrial applicability is demonstrated by scale-out of the industrial demonstration reactions to the pilot scale. A multi-purpose, container-type plant infrastructure will integrate individual reaction and separation modules in block format, standardised basic logistics, process control, safety installations, and on-line analytics. As guidance before (ex-ante) and during the whole development, holistic life cycle (LCA) and cost analyses will pave directions towards competitiveness and sustainability. The POLYCAT technologies have potential to reduce the environmental impact by 20% up to orders of magnitude: e.g. reduction of green house gas emissions, acids (SO2-Eq.), nutrients (NOx-Eq.), toxic substances (1,4-DCB Eq.) and finite abiotic resources (antimony eq.). With (enantio)selectivity increases up to 25%, solvent reductions of 30-100%, and products cost decreases of about 10%, a midterm impact of 30-110 Mio Euro and longterm impact of 100-560 Mio Euro result.

Solnyshkin A.V.,Tver State University | Kislova I.L.,Tver State Technical University
Ferroelectrics | Year: 2010

The frequency dependence of real (ε′) and imaginary (ε″) components of the complex dielectric permittivity (ε*) of poly(vinylidene fluoride-triflouroethylene) copolymer has been determined in the temperature range from -40 to 140°C including the transition to glassy state at Tg ≈ -25°C and ferroelectric-to-paraelectric (F-P) transition. During the cooling, the relaxor-like behavior is observed up to TC for enough high frequencies. Analysis of the dielectric dispersion spectra was carried out using the Havriliak-Negami empirical model. The observed peculiarities of the dielectric response are discussed on the basis of the coexistence of both the short range and long range interactions. Copyright © Taylor & Francis Group, LLC.

Makarov A.N.,Tver State Technical University
Thermal Engineering (English translation of Teploenergetika) | Year: 2014

The progress seen in the 19th-21st centuries in the development of methods for calculating heat transfer in torch furnaces, fireboxes, and combustion chambers is analyzed. Throughout the 20th century, calculations of heat transfer were carried out based on the law for radiation from solid bodies deduced by Y. Stefan and L. Boltzmann. It is shown that the use of this law for calculating heat transfer of a torch (a gaseous source of radiation) in heating furnaces and power-generating installations leads to incorrect results. It is substantiated that there is crisis of methods for calculating heat transfer in torch furnaces and power-generating installations. Geometrical and physical torch models in the form of radiating cylindrical gas volumes as sources of heat radiation are proposed for overcoming this crisis. © 2014 Pleiades Publishing, Inc.

Makarov A.N.,Tver State Technical University
Power Technology and Engineering | Year: 2016

Asolution is given to the problem of heat transfer in the firebox of a steam boiler, taking account of the radiation from all quadrillions of atoms constituting the flare. An innovative firebox for a steam boiler is proposed: the lower part of the firebox is a rectangular parallelepiped and the upper part a four-sided pyramid. The calculations show that in the proposed firebox the nonuniformity of the heat-flux distribution is diminished along the height and perimeter of the walls and nitrogen oxide emissions are reduced. © 2016, Springer Science+Business Media New York.

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