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Документ Optimal design of plate-and-frame heat exchangers for efficient heat recovery in process industries(Elsevier Inc., 2011) Arsenyeva, O. P.; Tovazhnyansky, L. L.; Kapustenko, P. O.; Khavin, G. L.The developments in design theory of plate heat exchangers, as a tool to increase heat recovery and efficiency of energy usage, are discussed. The optimal design of a multi-pass plate-and-frame heat exchanger with mixed grouping of plates is considered. The optimizing variables include the number of passes for both streams, the numbers of plates with different corrugation geometries in each pass, and the plate type and size. To estimate the value of the objective function in a space of optimizing variables the mathematical model of a plate heat exchanger is developed. To account for the multi-pass arrangement, the heat exchanger is presented as a number of plate packs with co- and counter-current directions of streams, for which the system of algebraic equations in matrix form is readily obtainable. To account for the thermal and hydraulic performance of channels between plates with different geometrical forms of corrugations, the exponents and coefficients in formulas to calculate the heat transfer coefficients and friction factors are used as model parameters. These parameters are reported for a number of industrially manufactured plates. The described approach is implemented in software for plate heat exchangers calculation.Документ Computer Aided Design of Plate Heat Exchangers(Elsevier Inc., 2010) Arsenyeva, O. P.; Tovazhnyansky, L. L.; Kapustenko, P. O.; Khavin, G. L.The computer aided design of plate heat exchanger with mixed grouping of plates is considered. It is formulated as the mathematical problem of finding the minimal value for implicit nonlinear discrete/continues objective function with inequality constraints. The optimizing variables include the number of passes for both streams, the numbers of plates with different corrugation geometries in each pass, the plate type and its size. To estimate the value of objective function in a space of optimizing variables the mathematical model of plate heat exchanger is developed. To account for thermal and hydraulic performance of channels between plates with different geometrical forms of corrugations, the exponents and coefficients in formulas for heat transfer coefficients and friction factors calculation are used as model parameters. The procedure and software for numerical experiment to identify model parameters by comparing the calculation results with those obtained with free available in web computer programs of plate manufacturers is developed. The sets of such parameters are obtained for a number of industrially manufactured plates. The described approach is implemented as software for plate heat exchangers calculation.Документ Generalised semi-empirical correlation for heat transfer in channels of plate heat exchanger(Elsevier Inc., 2014) Arsenyeva, O. P.; Tovazhnyanskyy, Leonid Leonidovich ; Kapustenko, P. O.; Demirskiy, O. V.The analogy of heat and momentum transfer in turbulent flow modified for channels of Plate Heat Exchanger (PHE) is proposed. The effects of channel geometry, flow velocity and fluid properties on heat transfer are accounted in the resulting equation, which permits the calculation of film heat transfer coefficients using the generalized correlation for friction factor at the main corrugated field of the interplate channel. The results of calculations are compared with data from experimental study. The good accuracy of film heat transfer coefficients prediction is shown. In the case when the corrugations direction is parallel to the flow direction, the calculations results are quite close to the predicted by the Equation published in the literature for straight pipes. The Prandtl number influence on heat transfer is discussed and semi-empirical Equation for its evaluation is proposed. The comparison with experimental data available in the literature confirmed the accuracy of the heat transfer prediction. The proposed Equation is recommended to be used for optimization of PHEs channels geometry for different conditions in the process industries. It can be employed also for optimizing PHEs heat exchange networks and also to determine PHEs heat transfer area targets when process integration methodology is employed.Документ The influence of plate corrugations geometry on plate heat exchanger performance in specified process conditions(Elsevier Inc., 2013) Arsenyeva, O. P.; Kapustenko, P. O.; Tovazhnyanskyy, Leonid Leonidovich ; Khavin, G. L.The mathematical model of plate heat exchanger (PHE) is developed using decomposition of the plate on its main corrugated field, which cause major effect on heat transfer, and distribution zone, which influences mostly the hydraulic performance. Model is validated on experimental data for some commercial plates. It is shown, that for specified pressure drop, temperature program and heat load the geometrical parameters of plate and its corrugations, which are enable to make PHE with minimal heat transfer area, can be found. The developed mathematical model can be used for designing of plates with geometry, which is in the best way satisfying process conditions of the certain specific range. The case study for conditions of PHE application in District Heating systems is presented.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 Investigation of fouling in plate heat exchanger at sugar factory(2016) Demirskyy, O.; Kapustenko, P. O.; Khavin, G. L.; Arsenyeva, O. P.; Matsegora, O.; Kusakov, S.; Bocharnikov, I.