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Документ Heat transfer and pressure loss in small-scale pillow-plate heat exchangers(The Italian Association of Chemical Engineering, 2018) Arsenyeva, O. P.; Piper, Mark; Zibarta, Alexander; Olenberg, Alexander; Kenig, E. Y.In this work, an experimental study of heat transfer between air and water in a small-scale pillow-plate heat exchanger (PPHE) consisting of two pillow plates assembled together in one unit was carried out. In the experiments, cooling water flows in two inner channels (i.e., channels inside welded pillow plates), whereas air is directed to the outer channel between the plates. Heat transfer and hydraulic resistance in inner and outer PPHE channels are analysed based on the experimental data. The measurements were used to develop correlations for the pressure loss and heat transfer coefficients in both inner and outer channels. For the detailed investigation of pressure loss and wall shear stress in the outer channel between pillow plates, CFD simulations were carried out for the considered geometry. The Reynolds number was equal to 5,173, which ensured fully developed turbulent flow. The proposed correlations derived from experimental data were compared with the CFD simulation results. They can be used to predict thermal and hydraulic performance of small-scale PPHEs.Документ The hydraulic resistance in the small-scale pillow-plate heat exchangers(Національний університет "Львівська політехніка", 2019) Arsenyeva, O. P.The Pillow-Plate Heat Exchangers (PPHEs) are rated as innovative type of heat transfer equipment. The present paper gives the information about the research made in Paderborn University aimed to investigate the heat transfer and pressure drop in the channels of the small-scale PPHE.Документ The correlation of experimental results for condensation of steam from its mixture with air in channel of plate heat exchanger based on mathematical modelling(Національний університет "Львівська політехніка", 2019) Kapustenko, P. O.; Tovazhnyanskyy, Leonid Leonidovich ; Arsenyeva, O. P.; Vasilenko, O. A.; Kusakov, S. K.The process of steam condensation in the presence of air in channels of plate heat exchanger is investigated experimentall and with mathematical modelling. The equation accounting for transvers mass flux on heat and mass transfer is obtained. The results allow design of platecondenserss for steam containing noncodensable gas.Документ C# language programming(National Technical University "Kharkiv Polytechnic Institute", 2019) Arsenyeva, O. P.; Solovey, L. V.The present theoretical and practical guide concerns the study of C# programming language, version 4.5. The guide includes a lot of examples of coding with different difficulty level. The examples contain the theoretical explanations of each coding part. All the mentioned programs are given with the outgoing results. Each subject contains the practical examples for individual work or laboratory work. The guide is structured according to the complexity approach, starting from the basic knowledge and step-by step explanation of more specific features of C# programming language. The guide contains the education material for 161st specialty namely “Chemical technology and engineering”.Документ Computer science and programming (Engineering calculations in Microsoft Excel)(National Technical University "Kharkiv Polytechnic Institute", 2017) Arsenyeva, O. P.; Ved, O. V.; Solovey, L. V.; Yuzbashian, A. P.The teaching and practical guide is devoted to study how to make the engineering calculations using the Microsoft Excel software. Different examples of engineering tasks with the varied complexity are provided with step-by-step explanation with corresponding illustrations. The obtained results are provided. Each subject includes the explained case studies and the tasks for work in class and individually. The teaching and practical guide is aimed for the students studying in chemical engineering, which want to use Microsoft Excel software for engineering calculations.Документ Computer science and programming (Engineering calculations in Mathcad)(National Technical University "Kharkiv Polytechnic Institute", 2017) Arsenyeva, O. P.; Ved, O. V.; Solovey, L. V.; Yuzbashian, A. P.The teaching and practical guide is devoted to study how to make the engineering calculations using the Mathcad software. The different examples of engineering tasks with the varied complexity are provided with step-by-step explanation with corresponding illustrations. The obtained results are provided. Each subject includes the explained case studies and the tasks for work in class and individually. The teaching and practical guide is aimed for the students studying in chemical engineering, which want to use Mathcad for engineering calculations.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 The estimation of heat transfer area of pillow-plate heat exchangers for water heating(NTU "KhPI", 2017) Arsenyeva, O. P.; Kapustenko, P. O.; Vasilenko, O. A.; Tran, J. M.; Kenig, E. Y.Efficient heat recuperation is of primary importance in resolving the problem of efficient energy usage and consequent reduction of fuel consumption and greenhouse gas emissions. To solve this problem, different strategies can be used, but all the approaches need efficient heat transfer equipment. One of the innovative types of heat transfer equipment is the Pillow-Plate Heat Exchangers (PPHEs). The present paper gives the information about the main manufacturers of PPHEs, describes the existing approaches for determining the pressure drop and heat transfer. The application of the PPHE for water heating is considered, and the resulted heat transfer area is compared with the surface of chevron-type plate heat exchanger designed for the same process conditions.Документ The Mathematical Modelling of Fouling Formation Along PHE Heat Transfer Surface(The Italian Association of Chemical Engineering, 2017) Kapustenko, P. O.; Arsenyeva, O. P.; Matsegora, O. I.; Kusakov, S. K.; Tovazhnianskyi, V. I.The phenomena of fouling can significantly deteriorate the intensity of heat transfer process and influence heat exchanger performance. The correct account for fouling is especially important in PHE with much higher heat transfer coefficients than in tubular heat exchangers. The mathematical model of heat transfer in PHE subjected to fouling is proposed. The model is represented by the system of partial differential equations which integration permit to estimate local parameters of heat exchanging streams and developing in time local values of fouling depositions layer thickness. The fouling rate is determined with the use of fouling deposition model proposed earlier. The model is validated by comparison with the data obtained for PHE working in industry and can be used for more accurate calculation of PHE heat transfer area in conditions of fouling formation than methods relying on averaged process haracteristics. The model application is illustrated by two case studies for PHE application in sugar industry and in District Heating system.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.