Перегляд за Автор "Perevertaylenko, O. Yu."
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Документ About the Possibilities of the Heat Exchangers Network Retrofit for Post-Combustion CO₂ Capture Unit Without Stream Split(The Italian Association of Chemical Engineering, 2014) Perevertaylenko, O. Yu.; Gariev, A. O.; Damartzis, Theodoros; Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.; Arsenyeva, O. P.There is an increasing interest in post-combustion CO2 capture connected with climate change and further use of captured CO2 in enhanced oil and gas recovery and as a feed to produce such products as methanol, dimethylether and others, use in hot dry rock technologies etc. The currently used post-combustion method with monoethanolamine (MEA) absorption without stream split has two shortcomings: significant steam consumption to regenerate amine solution and relatively high cost of heat exchange equipment of absorption unit or Heat Exchange Network of Absorption Unit (HEN AU). The variation of temperature differences on rich/lean heat exchanger was considered and its influence on heat supply, cost of HEN AU and cold utility consumption was searched. The high effective plate heat exchangers are proposed as components of HEN AU to decrease its cost. The possibility of flue gas stream heat integration for heat supply to the desorber was searched too.Документ Ammonia Refrigeration Cycle Integration in Buildings Heating System(The Italian Association of Chemical Engineering, 2012) Boldyryev, S. A.; Kapustenko, P. O.; Tovazhnyanskyy, Leonid Leonidovich ; Garev, A. O.; Perevertaylenko, O. Yu.; Khavin, G. L.; Arsenyeva, O. P.; Klemeš, Jiří JaromírThis work investigates the possibility of ammonia low potential heat utilisation with use of Process Integration methodology. The two operation modes are considered. The first one is the use of ammonia gas super-heating and partly ammonia condensation. The low condensation temperature of ammonia is limiting the low potential heat usage. The second option is introduction of ammonia additional compression to increase the temperature of ammonia condensation. The low potential heat consumers are the hot water supply system, air pre-heating system and air heating for the fans.Документ Eco-Friendly Synergetic Processes of Municipal Solid Waste Polymer Utilization(The Italian Association of Chemical Engineering, 2018) Bukhkalo, S. I.; Klemeš, Jiří Jaromír; Tovazhnyanskyy, Leonid Leonidovich ; Arsenyeva, O. P.; Kapustenko, P. O.; Perevertaylenko, O. Yu.The synergetic approach for eco-friendly efficient utilization of Polymer Solid Waste is presented. It is accounting for chemical processes in polymers during the use of the original product and at the stage of its waste recycling. The study of the polymer photoconductive degradation based on analysis of chemical reactions in the polymer film is presented. It is discussed how to predict the properties of the polymer after its use and to develop the efficient technique for its recycling. The recycling technique is demonstrated on examples of recycling polyethylene film by chemical foaming and injection moulding methods. The results of factorial experiments on the influence of different process parameters on process intensity and secondary product quality are presented. The results are used for developing modern technologies for the processing of polymer solid wastes into useful secondary products.Документ Heat integration of ammonia refrigeration cycle into buildings heating systems in buildings(Наука, 2013) Boldyryev, S. A.; Garev, A. O.; Klemeš, J. J.; Tovazhnyansky, L. L.; Kapustenko, P. O.; Perevertaylenko, O. Yu.; Arsenyeva, O. P.The possibility of utilizing the low potential heat of the ammonia refrigeration cycle has been shown. The design of an energy saving heat exchangers network to heat water and air in municipal buildings has been proposed. The possibility of increasing the pressure of ammonia with the purpose of improving the heat recovery in the system and reducing the load of the heating and cooling systems was considered. The minimum temperature difference in the heat exchangers network was selected. The economic efficiency of the retrofit project was estimated.Документ Heat transfer and pressure drop in cross-flow welded plate heat exchanger for ammonia synthesis column(2016) Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.; Perevertaylenko, O. Yu.; Khavin, G. L.; Arsenyeva, O. P.; Arsenyev, P. Yu.Документ The investigation of vapor condensation in horizontally oriented channels with cross corrugated walls(The Italian Association of Chemical Engineering, 2007) Perevertaylenko, O. Yu.; Nagorniy, E. R.; Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.The problem of heat transfer for flows in channels of plate heat exchangers with cross corrugated walls is very complicated, especially relating to two phase flows. The subject of the investigation is the process of vapor condensation in horizontally oriented channels formed by corrugated plates. The corrugation of plates is complicated and consists of different patterns. The experimental investigations were carried out for single phase flow in channels under investigation and for condensation of pure vapor and vapor containing non condensable gases. Appropriate relationships were obtained. The results of investigation were used for development of special plate heat exchanger for condensation column of ammonia synthesis unit, where the condensation of synthetic ammonia occurs. The manufactured plate unit was installed into existing condensation column. The results of industrial tests are in good agreement with experimentally based relationships used for calculations and design of the plate heat exchanger.Документ Mathematical Model of Heavy Duty Welded Plate Heat Exchanger and its Validation in Industry(The Italian Association of Chemical Engineering, 2017) Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.; Perevertaylenko, O. Yu.; Arsenyeva, O. P.; Arsenyev, P. Y.; Khusanov, A. E.Plate Heat Exchanger (PHE) is one of the modern types of compact heat transfer equipment, which can significantly enhance the heat recuperation and improve efficiency of energy usage in many industrial applications. The construction of welded PHE (WPHE) is significantly widening the range of its application on temperature and pressure. The construction of investigated WPHE is developed for work in high pressure shell of ammonia synthesis column at pressure up to 32 MPa and temperature up to 520 °C. It consists of the stack of round corrugated plates with diameter 626 mm, which are welded together to form a number of channels for cold and hot streams exchanging heat. The welded collectors of special design are organizing multi pass movement of both streams with overall counter flow. The movement of two streams in one pass block is cross flow with overall counter flow in a whole WPHE. The mathematical model of considered WPHE is developed, which enables to perform the thermal and hydraulic design for specified process conditions and also rating calculations of WPHE with determined parameters of its construction. The validity of the proposed Equations and developed mathematical model is confirmed by comparison with the data of tests on WPHE installed in ammonia synthesis column at industrial enterprise of ammonia production. WPHE was operating in existing synthesis column of ammonia unit instead shell-and-tube heat exchanger. The construction of WPHE and the results of the tests are discussed. The use of WPHE instead shell-and-tube unit enable to cut down the volume occupied by heat exchanger in high pressure shell of ammonia synthesis column and allows increase of the volume of catalyst. It leads to 15 % rise of ammonia output.Документ The New Corrugation Pattern for Low Pressure Plate Condensers(The Italian Association of Chemical Engineering, 2010) Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.; Perevertaylenko, O. Yu.; Arsenyeva, O. P.; Khavin, G. L.Low pressure and especially vacuum vapours condensation processes are widely used in different industries such as power generation, chemical, biochemical, pharmaceutical, food etc. Plate Heat Exchangers (PHEs) are one of the modern efficient types of heat transfer equipment, but their usage as condensers for low pressure vapour is limited mostly because of relatively high pressure drop of condensing media. To overcome this obstacle the new principle of plate corrugation for low pressure plate-and-frame condensers is proposed. The basic trends on developments of corrugated patterns for low pressure plate condensers were investigated. The principle of channels with variable geometry was selected for new corrugated pattern development. The proposed plate for condenser has the heat transfer area that consists of several corrugated sections along its length. Shape and dimensions of ridges and valleys of corrugations are variable. The corrugations are inclined to plate vertical axis so the ridges of two adjacent plate corrugations are in contact. The channel formed by such plates has the variable cross-section area. The experimental study of heat transfer and pressure drop for channels of such pattern was carried out. The dependencies for film heat transfer and pressure drop were obtained for each channel part formed with adjacent sections of the plates. The obtained results were compared with those for plates which are conventionally used. The advantages of proposed corrugation are discussed. The calculation methods based on obtained results were developed for single-phase flows heat exchange and for condensation of pure vacuum vapours. The recommendations on plate surface synthesis are presented.Документ Plate Heat Exchangers for Environmentally Friendly Heat Pumps(The Italian Association of Chemical Engineering, 2007) Tovazhnyanskyy, Leonid Leonidovich ; Sherstyuk, V.; Khavin, G. L.; Perevertaylenko, O. Yu.; Boldyryev, S.; Garev, A.; Kapustenko, P. O.Plate heat exchangers are now widely used in different industrial installations due to their unique characteristics important for process engineering. In recent years the use of plate heat exchangers for heat pumps has significantly increased, including the cases with natural refrigerants such as hydrocarbons, ammonia and carbon dioxide. The typical duties of plate heat exchangers in heat pumps with natural refrigerants are defined and acceptable types of plate heat exchangers for each duty discussed. The advantages of plate heat exchangers are very useful in units coupled with evaporators and condensers. In this case the proper selection of the plate materials taking into account the nature of the source of low potential heat for units coupled with evaporators is required. Proper prediction of fouling factor is also important for units coupled with condenser.