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Boldyryev S.,Kharkiv Polytechnic Institute | Varbanov P.S.,University of Pannonia | Nemet A.,University of Pannonia | Klemes J.J.,University of Pannonia | Kapustenko P.,AO SPIVDRUZHNIST T LLC
Energy Conversion and Management | Year: 2014

In this paper a further development of methodology for decreasing the capital cost for Total Site heat recovery by use of different utility levels is proposed. The capital cost of heat recovery system is estimated for certain temperature level of intermediate utility applying Total Site Profiles. Heat transfer area is reduced by selection of appropriate temperature of intermediate utility. Minimum of heat transfer area depends on slopes of Total Site Profiles in each enthalpy interval. This approach allows estimating the minimum of heat transfer area for heat recovery on Total Site level. Case study is performed for fixed film heat transfer coefficients of process streams and intermediate utilities. It indicates that the total heat transfer area of heat recovery can be different up to 49.15% for different utility temperatures. © 2014 Elsevier Ltd. Source

Kilkovsky B.,Brno University of Technology | Stehlik P.,Brno University of Technology | Jegla Z.,Brno University of Technology | Tovazhnyansky L.L.,Kharkiv Polytechnic Institute | And 2 more authors.
Applied Thermal Engineering | Year: 2014

Energy recovery system of waste-to-energy and/or biomass to energy units represents a substantial part of the whole technology which enables to utilize heat contained in flue gas (off-gas) from incinerators or combustion chambers as much as possible. It is in fact an integrated approach which is illustrated through an example of up-to-date waste-to-energy technology. A simulation system enables to obtain process parameters for thermal and hydraulic design of heat exchangers. It is shown when conventional heat exchangers are used and when there is no other choice than to use tailor-made applications. New types of heat exchangers which were gradually developed are shown. Operational problems like fouling are discussed, and examples of troubleshooting with utilizing computational fluid dynamics as an useful tool are shown as well as a contribution to uniform fluid flow distribution. It is emphasized how understanding of both the process and equipment design is important to be able to speak about a complex and integrated approach. © 2013 Elsevier Ltd. All rights reserved. Source

Arsenyeva O.P.,AO SPIVDRUZHNIST T LLC | Tovazhnyanskyy L.L.,Kharkiv Polytechnic Institute | Kapustenko P.O.,Kharkiv Polytechnic Institute | Khavin G.L.,AO SPIVDRUZHNIST T LLC | Yuzbashyan A.,AO SPIVDRUZHNIST T LLC
Chemical Engineering Transactions | Year: 2015

The developments in design theory of Shell-and-Plate Heat Exchangers (SPHE), aiming to enhance the heat recovery and efficiency of energy usage, are discussed. The thermal and hydraulic performance of the unit is estimated using two approaches: by proper selection of plate corrugation pattern and by the adjustment of plates with different height of corrugation in one unit. The optimization problem targeting the minimal heat transfer area under the requirements of proper operating conditions is observed. The optimizing variables include the number of plates with different corrugation geometries in one pass. To estimate the value of the objective function in a space of optimizing variables the mathematical model of SPHE is developed. The possibilities of their application as heat exchangers in preheat train of crude oil distillation unit of the oil refinery are analysed basing on obtained design parameters with the effect of flow movement arrangement in the unit and its influence on shear stress and fouling formation. The comparison with another Compabloc type welded PHE is discussed. Copyright © 2015, AIDIC Servizi S.r.l.,. Source

Kapustenko P.O.,AO SPIVDRUZHNIST T LLC | Ulyev L.M.,Kharkiv Polytechnic Institute | Ilchenko M.V.,Kharkiv Polytechnic Institute | Arsenyeva O.P.,AO SPIVDRUZHNIST T LLC
Chemical Engineering Transactions | Year: 2015

The heat exchanger network (HEN) of the unit of benzene production at petrochemical plant was inspected and the obtained data were analyzed for possible plant retrofit targeting the minimal energy consumption and increasing of plant efficiency. The benzene-toluene-xylene fractionation, hydrogenation, hydrodesulphurization and hydrothermo processing units of the plant were analysed and the data of existing HEN flowsheets were extracted. The minimum temperature difference for the retrofit was determined by analyzing the cost parameters of the proposed modifications as well as the energy cost. Using Pinch Analysis methodology the Composite Curves and Grid Diagram were obtained for the integrated processes of these plant units. The new flowsheet of the HEN of the regarded units was developed; and the possible application of heat transfer equipment was analyzed and proposed. Copyright © 2015, AIDIC Servizi S.r.l.,. Source

Arsenyeva O.P.,AO SPIVDRUZHNIST T LLC | Tovazhnyanskyy L.L.,Kharkiv Polytechnic Institute | Kapustenko P.O.,Kharkiv Polytechnic Institute | Demirskiy O.V.,AO SPIVDRUZHNIST T LLC
Chemical Engineering Transactions | Year: 2013

The modification of Von Karman analogy for turbulent flow in channels of Plate Heat Exchangers (PHEs) is proposed. The resulting equation enables to calculate film heat transfer coefficients in PHE channel on a data of hydraulic resistance of the channel main heat transfer field, accounting for the influence of channel geometry, flow velocity and fluid properties. The comparison with experimental data for water flow in models of PHE channels main corrugated fields is presented. It is shown the good accuracy of prediction for film heat transfer coefficients. In the limiting case, where corrugations are parallel to plate axis, the results of calculations by proposed Equation are in excellent agreement with Equation published for straight tubes and channels by Gnielinski in 1975. The analysis of the Prandtl number influence on heat transfer is performed. It explains the difference of Pr powers, which varies from 0.6 to 0.3 at correlations reported in different experimental papers on heat transfer. The proposed Equation can be used for modelling of PHEs heat transfer performance in a wide range of different applications in process industries. Copyright © 2013, AIDIC Servizi S.r.l. Source

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