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Artículos de revistas sobre el tema "Heat exchangers Fluid dynamics"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 31 de enero de 2023

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1

Dawood Jumaah, Itimad, Senaa Kh. Ali, and Anees A. Khadom. "Evaluation Analysis of Double Coil Heat Exchanger for Heat Transfer Enhancement." Diyala Journal of Engineering Sciences 14, no. 1 (March 15, 2021): 96–107. http://dx.doi.org/10.24237/djes.2021.14109.

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In order to maximize the thermal efficiency of shell and coil heat exchangers, substantial research has been done and geometrical modification is one way to improve the exchange of thermal energy between two or more fluids. One of the peculiar features of coiled geometry is that the temperature distribution is highly variable along the circumferential section due to the centrifugal force induced in the fluid. Moreover, most researchers are concentrated on using a shell and single helical coil heat exchanger to enhance the heat transfer rate and thermal efficiency at different operating paramet

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2

Никулин, Н., and Nikolay Nikulin. "THE STUDY OF HEAT TRANSFER IN INTENSIFIED SHELL AND TUBE DEVICE." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 4, no. 4 (April 25, 2019): 77–82. http://dx.doi.org/10.34031/article_5cb1e65e6c0d28.53980880.

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The use and prevalence of heat exchangers in Russian heat supply systems are considered. Attention is paid to the improvement of serial heat exchangers with smooth tubes – the increasing of heat transfer coefficient. One of the ways to increase the heat transfer coefficient is considered: it is the turbuliza-tion of the fluid flow on the heat exchange surface. The original design of the heat exchange surface for shell and tube devices of heat supply systems is presented. The dynamics of the heated fluid in the annular space of a shell and tube heat exchanger when flowing around the heat exchan

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3

Aydin, Ahmet, Halit Yaşar, Tahsin Engin, and Ekrem Büyükkaya. "Optimization and CFD analysis of a shell-and-tube heat exchanger with a multi segmental baffle." Thermal Science, no. 00 (2020): 293. http://dx.doi.org/10.2298/tsci200111293a.

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The Shell-and-tube type heat exchangers have long been widely used in many fields of industry. These types of heat exchangers are generally easy to design, manufacturing and maintenance, but require relatively large spaces to install. Therefore the optimization of such heat exchangers from thermal and economical points of view is of particular interest. In this article, an optimization procedure based on the minimum total cost (initial investment plus operational costs) has been applied. Then the flow analysis of the optimized heat exchanger has been carried out to reveal possible flow field a

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4

Walter, Christian, Sebastian Martens, Christian Zander, Carsten Mehring, and Ulrich Nieken. "Heat Transfer through Wire Cloth Micro Heat Exchanger." Energies 13, no. 14 (July 10, 2020): 3567. http://dx.doi.org/10.3390/en13143567.

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The main objective of this study is to calculate and determine design parameters for a novel wire cloth micro heat exchanger. Wire cloth micro heat exchangers offer a range of promising applications in the chemical industry, plastics technology, the recycling industry and energy technology. We derived correlations to calculate the heat transfer rate, pressure drop and temperature distributions through the woven structure in order to design wire cloth heat exchangers for different applications. Computational Fluid Dynamics (CFD) simulations have been carried out to determine correlations for th

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5

Kamidollayev, Tlegen, Juan Pablo Trelles, Jay Thakkar, and Jan Kosny. "Parametric Study of Panel PCM–Air Heat Exchanger Designs." Energies 15, no. 15 (July 30, 2022): 5552. http://dx.doi.org/10.3390/en15155552.

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Heat exchangers, devices for the transfer of heat between two or more working fluids, are extensively used in cooling applications and heating applications. Heat exchangers in buildings are typically components of space-conditioning systems, as well as of water-heating applications. Heat exchangers are also sometimes used in applications that require storage and release of energy at specific times. Phase change materials (PCMs) enhance these heat-exchange processes, given their ability to melt and solidify at a fixed range of temperatures, absorbing or releasing significant amounts of latent h

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6

Trokhaniak, V. I., I. L. Rogovskii, L. L. Titova, P. S. Popyk, O. O. Bannyi, and P. H. Luzan. "Computational fluid dynamics investigation of heat-exchangers for various air-cooling systems in poultry houses." Bulletin of the Karaganda University. "Physics" Series 97, no. 1 (March 30, 2020): 125–34. http://dx.doi.org/10.31489/2020ph1/125-134.

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The increase in the productivity of poultry plants is connected with the necessity to create the optimal controlled environment in poultry houses. This problem is of prime importance due to the decrease of poultry plant productivity caused by the imperfection of the existing controlled environment systems. The paper presents the improved environment control system in a poultry house. The processes of heat- and mass-exchange in the developed heat-exchangers for various ventilation systems have been investigated. Computational Fluid Dynamics analysis of the heat-exchangers of two various designs

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7

Fetuga, Ibrahim Ademola, Olabode Thomas Olakoyejo, Adeola S. Shote, Gbeminiyi Mike Sobamowo, Omotayo Oluwatusin, and Joshua Kolawole Gbegudu. "Thermal and Fluid Flow Analysis of Shell-and-Tube Heat Exchangers with Smooth and Dimpled Tubes." Journal of Advanced Engineering and Computation 6, no. 3 (September 30, 2022): 233. http://dx.doi.org/10.55579/jaec.202263.378.

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This current work mainly focuses on the enhancement of the heat transfer and fluid flow characteristics of shell-and-tube heat exchangers by incorporating dimples on the smooth or conventional tubes. With the aid of the ANSYS (Fluent) commercial software package, Computational Fluid Dynamics (CFD) simulations under a steady-state condition were conducted on heat exchanger having a single shell and 12 tubes (with or without dimples), 50% baffle cut, 100mm baffle spacing and turbulent flow. The temperature, velocity, and pressure fields at the shell and tube zone in both cases are analyzed. The

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8

Hughes, J. P., T. E. R. Jones, and P. W. James. "Numerical Simulations and Experimental Measurements of the Isothermal Flow in a Model Tubular Heat Exchanger." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 220, no. 2 (May 1, 2006): 109–19. http://dx.doi.org/10.1243/095440806x78847.

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This paper describes numerical simulations and experimental measurements of isothermal laminar flow on the shell side of a model tubular heat exchanger, for both Newtonian and non-Newtonian fluids. Commercially available computational fluid dynamics software is used for the simulations, which are shown to be in good agreement with experimental measurements of shear rate and pressure drop. The simulations can then be used to provide a detailed description of the laminar shell-side flow in the model tubular heat exchanger. The motivation for this work stems from interest in the food processing i

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9

Sundén, Bengt. "Computational Fluid Dynamics in Research and Design of Heat Exchangers." Heat Transfer Engineering 28, no. 11 (November 2007): 898–910. http://dx.doi.org/10.1080/01457630701421679.

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10

Chennu, Ranganayakulu. "Numerical analysis of compact plate-fin heat exchangers for aerospace applications." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 2 (February 5, 2018): 395–412. http://dx.doi.org/10.1108/hff-08-2016-0313.

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Purpose The purpose of this study is to find the thermo-hydraulic performances of compact heat exchangers (CHE’s), which are strongly depending upon the prediction of performance of various types of heat transfer surfaces such as offset strip fins, wavy fins, rectangular fins, triangular fins, triangular and rectangular perforated fins in terms of Colburn “j” and Fanning friction “f” factors. Design/methodology/approach Numerical methods play a major role for analysis of compact plate-fin heat exchangers, which are cost-effective and fast. This paper presents the on-going research and work car

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11

Naqvi, S. M. A., and Qiuwang Wang. "Numerical Comparison of Thermohydraulic Performance and Fluid-Induced Vibrations for STHXs with Segmental, Helical, and Novel Clamping Antivibration Baffles." Energies 12, no. 3 (February 9, 2019): 540. http://dx.doi.org/10.3390/en12030540.

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The most extensively used heat exchanger in numerous research fields and industrial processes is the shell and tube heat exchanger. The selection of the baffle plays a vital role to regulate and increase the thermohydraulic performance and also to decrease fluid-induced vibrations due to shell side flow. 3-D computational fluid dynamics (CFD) and fluid-structure interaction (FSI) have been done to analyze the pressure drop, heat transfer coefficient, vortex shedding, and tube deformation due to induced vibrations among the recently developed clamping antivibration baffles with square twisted t

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12

Kaviany, M., and M. Reckker. "Performance of a Heat Exchanger Based on Enhanced Heat Diffusion in Fluids by Oscillation: Experiment." Journal of Heat Transfer 112, no. 1 (February 1, 1990): 56–63. http://dx.doi.org/10.1115/1.2910364.

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The results of a study on the performance of a heat exchanger that takes advantage of enhanced heat diffusion in oscillated fluids are presented. In this heat exchanger, the fluid occupies a bundle of capillary tubes that connects two reservoirs at different temperatures; a piston in each reservoir drives the oscillation. The experimental findings are compared with predictions based on the assumptions that (a) a capillary tube does not exchange heat with the neighboring tubes, (b) the pressure in the reservoirs undergoes an ideal sinusoidal motion, and (c) each reservoir has an infinite heat c

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13

Álvarez Gómez, Pascual, Ismael Rodríguez Maestre, F. Javier González Gallero, and J. Daniel Mena Baladés. "The Influence of Outer Weather Conditions on the Modelling of Vertical Ground Heat Exchangers." Applied Mechanics and Materials 361-363 (August 2013): 276–80. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.276.

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Policies for energy saving and carbon dioxide emission reduction have enouraged the use of efficient technologies in building thermal conditioning, like geothermal source heat pumps [. Most of the thermal models used to simulate the performance of vertical ground heat exchangers do not consider the effect of outer weather conditions, except for the setting of the initial ground temperature [. This paper shows a study to assess the effect of outer weather conditions on the outlet fluid temperature, especially during the upper part of the exchanger. Different depths for typical configurations of

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14

Nurhasanah, Siti, Muhammad Subekti, Moch Nurul Subkhi, and Bebeh Wahid Nuryadin. "Optimal tube diameter on heat exchanger shell and tube type with 15 mega watt thermal power using fluent 6.3." MATEC Web of Conferences 197 (2018): 02011. http://dx.doi.org/10.1051/matecconf/201819702011.

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Heat exchanger shell and tube type is a set of tools that serve to move the heat from the side shell (hot fluid) to the tube (cold fluid). RSG-GAS Heat Exchangers is a heat exchanger shell and tube type 2-2. Since the age of Heat Exchanger operation long enough allow for new designs of heat transfer better. This is one reason the presence of micro modeling using Computational Fluid Dynamics (CFD), as one of them using the software FLUENT 6.3. Tube and shell modeled in GAMBIT with the variation ID (inner diameter) tube. As for the physical data such as flow rate, pressure, and temperature refer

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15

Ladeinde, Foluso. "Reduced-Order Computational-Fluid-Dynamics-Based Analysis of Aviation Heat Exchangers." Journal of Thermophysics and Heat Transfer 34, no. 4 (October 2020): 696–715. http://dx.doi.org/10.2514/1.t5903.

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16

Konchada, Pavan Kumar, Vinay Pv, and Varaprasad Bhemuni. "Statistical analysis of entropy generation in longitudinally finned tube heat exchanger with shell side nanofluid by a single phase approach." Archives of Thermodynamics 37, no. 2 (June 1, 2016): 3–22. http://dx.doi.org/10.1515/aoter-2016-0010.

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AbstractThe presence of nanoparticles in heat exchangers ascertained increment in heat transfer. The present work focuses on heat transfer in a longitudinal finned tube heat exchanger. Experimentation is done on longitudinal finned tube heat exchanger with pure water as working fluid and the outcome is compared numerically using computational fluid dynamics (CFD) package based on finite volume method for different flow rates. Further 0.8% volume fraction of aluminum oxide (Al2O3) nanofluid is considered on shell side. The simulated nanofluid analysis has been carried out using single phase app

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17

Alsahil, Muath I., Mowffaq M. Oreijah, and Mohamed H. Mohamed. "Quantitative and Qualitative Study of Double-Pipe Heat Exchangers Performance Using Water Based Nanofluids." Journal of Nanofluids 11, no. 6 (December 1, 2022): 924–43. http://dx.doi.org/10.1166/jon.2022.1891.

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The heat transfer performance of base fluids is greatly improved with suspended nanoparticles in a variety of applications such as solar collectors, heat pipes, nuclear reactors, cooling systems, automotive radiators, and more. In the present paper, the problem of flow of nanofluids with forced convection is studied in detail in three cases, under constant mass flow rates (Case 1), under optimized mass flow rates with two different geometric configuration scenarios of the heat exchangers, N-shaped pipe heat exchanger (Case 2) and M-shaped pipe heat exchanger (Case 3). Numerical results in the

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18

Shafagh, Ida, Simon Rees, Iñigo Urra Mardaras, Marina Curto Janó, and Merche Polo Carbayo. "A Model of a Diaphragm Wall Ground Heat Exchanger." Energies 13, no. 2 (January 7, 2020): 300. http://dx.doi.org/10.3390/en13020300.

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Ground thermal energy is a sustainable source that can substantially reduce our dependency on conventional fuels for heating and cooling of buildings. To exploit this source, foundation sub-structures with embedded heat exchanger pipes are employed. Diaphragm wall heat exchangers are one such form of ground heat exchangers, where part of the wall is exposed to the basement area of the building on one side, while the other side and the further depth of the wall face the surrounding ground. To assess the thermal performance of diaphragm wall heat exchangers, a model that takes the wall geometry

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19

Khanlari, Ataollah, Adnan Sözen, and Halil İbrahim Variyenli. "Simulation and experimental analysis of heat transfer characteristics in the plate type heat exchangers using TiO2/water nanofluid." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 4 (April 1, 2019): 1343–62. http://dx.doi.org/10.1108/hff-05-2018-0191.

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PurposeThe plate heat exchangers (PHE) with small size but large efficiency are compact types of heat exchangers formed by corrugated thin pressed plates, operating at higher pressures when compared to most other traditional exchangers. This paper aims to analyze heat transfer characteristics in the PHE experimentally and numerically.Design/methodology/approachComputational fluid dynamics analysis has been used to simulate the problem by using the ANSYS fluent 16 software. Also, the effect of using TiO2/water nanofluid as working fluid was investigated. TiO2/water nanofluid had 2% (Wt/Wt) nano

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20

Song, Su Fang. "Performance Study of Heat Exchangers with Continuous Helical Baffles on Different Inclination Angles." Advanced Materials Research 655-657 (January 2013): 461–64. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.461.

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The three-dimensional model of heat exchangers with continuous helical baffles was built. The fluid flow dynamics and heat transfer of shell side in the helical baffled heat exchanger were simulated and calculated. The velocity, pressure and temperature distributions were achieved. The simulation shows that with the same baffle pitch, shell-side heat transfer coefficient increased by 25% and the pressure drop decreases by 18% in helical baffled heat exchanger compared with segmental helical baffles. With the analyzing of the flow and heat transfer in heat exchanger in 5 different inclination a

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21

Agarwal, Abhishek. "Modelling & Numerical Investigation of the Effectiveness of Plate Heat Exchanger for Cooling Engine Oil Using ANSYS CFX." International Journal of Heat and Technology 39, no. 2 (April 30, 2021): 653–58. http://dx.doi.org/10.18280/ijht.390237.

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Heat exchangers are used for various industrial application for transfer of enthalpy from hot fluid to cold. One of them is Plate Heat Exchanger which finds its application in evaporating systems. The compactness, high effectiveness and easy maintenance of Plate Heat Exchanger makes it best choice for process industries. The current research investigates the application of Plate Heat Exchanger in cooling of engine oil using techniques of Computational Fluid Dynamics for low, medium and high Reynolds number using ANSYS CFX software. The CAD model is developed using Creo design software and turb

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22

Rus, Alexandru, Vlad Martian, and Mihai Nagi. "Study of Height Influence of Heat Exchanger Tanks on Overall Pressure Drop." Applied Mechanics and Materials 659 (October 2014): 446–49. http://dx.doi.org/10.4028/www.scientific.net/amm.659.446.

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In the context of a constant demand of more compact and efficient heat exchangers, the need for thoroughly researching the influence of the construction parameters impact on heat exchanger's performances arises. The purpose of the paper is to present the numerical results of such a research, carried out at RAAL S.A. with the support of "Politehnica" University of Timişoara. The research consists of assessing the effects of the geometric characteristics, the height in particular, of the inlet and outlet tanks of a water cooler on overall pressure drop, through Computational Fluid Dynamics. The

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23

Porter, Michael A., Dennis H. Martens, Thomas Duffy, and Sean McGuffie. "High-Temperature Heat Exchanger Tube-Sheet Assembly Investigation With Computational Fluid Dynamics." Journal of Pressure Vessel Technology 129, no. 2 (November 20, 2006): 313–15. http://dx.doi.org/10.1115/1.2716436.

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Many modern sulfur recovery unit process waste heat recovery exchangers operate in high-temperature environments. These exchangers are associated with the thermal reactor system where the tube-sheet–tube-ferrule assemblies are exposed to gasses at temperatures approaching 3000°F. Because sulfur compounds are present in the process gas, the carbon steel tube sheet and tubes in the assembly will be deteriorated by sulfidation as the operating metal temperature rises above 600°F. Ferrule systems are used to protect the carbon steel from exposure to excessive temperatures. The temperature distribu

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24

de Souza, Diego Amorim Caetano, Lúben Cabezas Gómez, and José Antônio da Silva. "Fluid Dynamic Simulation and Optimization of Compact Heat Exchangers with Louver Fins." Applied Mechanics and Materials 798 (October 2015): 205–9. http://dx.doi.org/10.4028/www.scientific.net/amm.798.205.

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Every technological process developed since the beginning of humanity to the present day always involves some kind of energy use, either mechanical energy of the body or energy from burning fuel or the solar energy obtained from the sun. To manipulate and use that energy, the man always developed resources and equipment to allow it. Among the wide range of equipment, heat exchangers, designed to transfer heat from one fluid to another, will be analyzed in this work. To do this analysis, are used computational fluid dynamics (CFD) techniques to analyze the flow behavior of a compact heat exchan

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25

Ajeeb, Wagd, Monica S. A. Oliveira, Nelson Martins, and S. M. Sohel Murshed. "Numerical approach for fluids flow and thermal convection in microchannels." Journal of Physics: Conference Series 2116, no. 1 (November 1, 2021): 012049. http://dx.doi.org/10.1088/1742-6596/2116/1/012049.

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Abstract The heat transfer performance of conventional thermal fluids in microchannels is an attractive method for cooling devices such as microelectronic applications. Computational fluid dynamics (CFD) is a very significant research technique in heat transfer studies and validated numerical models of microscale thermal management systems are of utmost importance. In this paper, some literature studies on available numerical and experimental models for single-phase and Newtonian fluids are reviewed and methods to tackle laminar fluid flow through a microchannel are sought. A few case studies

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26

Liu, Liu, and Yingwen Liu. "Numerical study on a thermoacoustic refrigerator with continuous and staggered arrangements." Thermal Science, no. 00 (2022): 25. http://dx.doi.org/10.2298/tsci210901025l.

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Thermoacoustic devices require heat exchangers with oscillating flow, but there is currently no viable design approach for them. A heat exchanger with a staggered structure can efficiently improve the velocity disturbance and promote heat transfer in steady flow. The flow and heat transfer characteristics of a standing-wave thermoacoustic refrigerator and an ambient heat exchanger with staggered parallel plates under the oscillating flow condition are investigated in this study, primarily focusing on the geometric influences and differences between staggered and non-staggered (continuous) arra

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van Driel, Michael R. "Cardioplegia heat exchanger design modelling using computational fluid dynamics." Perfusion 15, no. 6 (December 2000): 541–48. http://dx.doi.org/10.1177/026765910001500611.

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A new cardioplegia heat exchanger has been developed by Sorin Biomedica. A three-dimensional computer-aided design (CAD) model was optimized using computational fluid dynamics (CFD) modelling. CFD optimization techniques have commonly been applied to velocity flow field analysis, but CFD analysis was also used in this study to predict the heat exchange performance of the design before prototype fabrication. The iterative results of the optimization and the actual heat exchange performance of the final configuration are presented in this paper. Based on the behaviour of this model, both the wat

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28

Khan, Abdullah, Imran Shah, Waheed Gul, Tariq Amin Khan, Yasir Ali, and Syed Athar Masood. "Numerical and Experimental Analysis of Shell and Tube Heat Exchanger with Round and Hexagonal Tubes." Energies 16, no. 2 (January 12, 2023): 880. http://dx.doi.org/10.3390/en16020880.

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Shell and tube heat exchangers are used to transfer thermal energy from one medium to another for regulating fluid temperatures in the processing and pasteurizing industries. Enhancement of a heat transfer rate is desired to maximize the energy efficiency of the shell and tube heat exchangers. In this research work, we performed computational fluid dynamics (CFD) simulations and experimental analysis on the shell and tube heat exchangers using round and hexagonal tubes for a range of flow velocities using both parallel flow and counter flow arrangements. In the present work, the rate of heat t

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29

Navickaitė, Kristina, Michael Penzel, Christian R. H. Bahl, and Kurt Engelbrecht. "Performance Assessment of Double Corrugated Tubes in a Tube-In-Shell Heat Exchanger." Energies 14, no. 5 (March 1, 2021): 1343. http://dx.doi.org/10.3390/en14051343.

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In this article, the performance of double corrugated tubes applied in a tube-in-shell heat exchanger is analysed and compared to the performance of a heat exchanger equipped with straight tubes. The CFD (computational fluid dynamics) analysis was performed considering a turbulent flow regime at several mass flow rates. It is observed that the double corrugated geometry does not have a significant impact on the pressure drop inside the analysed heat exchanger, while it has the potential to increase its thermal performance by up to 25%. The ε–NTU (effectiveness–number of transfer units) relatio

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JUN, SOOJIN, and VIRENDRA M. PURI. "3D milk-fouling model of plate heat exchangers using computational fluid dynamics." International Journal of Dairy Technology 58, no. 4 (November 2005): 214–24. http://dx.doi.org/10.1111/j.1471-0307.2005.00213.x.

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Menni, Younes, Houari Ameur, Shao-Wen Yao, Mohammed Amine Amraoui, Mustafa Inc, Giulio Lorenzini, and Hijaz Ahmad. "Computational fluid dynamic simulations and heat transfer characteristic comparisons of various arc-baffled channels." Open Physics 19, no. 1 (January 1, 2021): 51–60. http://dx.doi.org/10.1515/phys-2021-0005.

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Abstract In this analysis, the baffling method is used to increase the efficiency of channel heat exchangers (CHEs). The present CFD (computational fluid dynamics)-based work aims to analyze the constant property, steady, turbulent, Newtonian, and incompressible fluid flow (air), in the presence of transverse-section, arc-shaped vortex generators (VGs) with two various geometrical models, i.e., arc towards the inlet section (called arc-upstream) and arc towards the outlet section (called arc-downstream), attached to the hot lower wall, in an in-line situation, through a horizontal duct. For th

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Wu, H. L., Y. Gong, and X. Zhu. "Air Flow and Heat Transfer in Louver-Fin Round-Tube Heat Exchangers." Journal of Heat Transfer 129, no. 2 (May 21, 2006): 200–210. http://dx.doi.org/10.1115/1.2402180.

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Experimental investigations were conducted to understand the air flow and heat transfer in louver-fin round-tube two-row two-pass cross-counterflow heat exchangers. The Colburn factor j and friction factor f were obtained by using the ε-NTU approach. A three-dimensional computational fluid dynamics model was developed based on a representative unit cell with periodical and symmetric boundary conditions. Analysis of tube-side circuiting effect has been conducted and showed improvement by applying overall nonlinear tube-side fluid temperature boundary conditions. Comparison of heat transfer rate

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Hu, Ping Fang, Zhong Yi Yu, Fei Lei, Na Zhu, Qi Ming Sun, and Xu Dong Yuan. "Performance Evaluation of a Vertical U-Tube Ground Heat Exchanger Using a Numerical Simulation Approach." Advanced Materials Research 724-725 (August 2013): 909–15. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.909.

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A vertical U-tube ground heat exchanger can be utilized to exchange heat with the soil in ground source heat pump systems. The outlet temperature of the working fluid through the U-tube not only accounts for heat transfer capacity of a ground heat exchanger, but also greatly affects the operational efficiency of heat pump units, which is an important characteristic parameter of heat transfer process. It is quantified by defining a thermal effectiveness coefficient. The performance evaluation is performed with a three dimensional numerical model using a finite volume technique. A dynamic simula

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Dwivedi, Anil Kumar, and Sarit Kumar Das. "Dynamics of plate heat exchangers subject to flow variations." International Journal of Heat and Mass Transfer 50, no. 13-14 (July 2007): 2733–43. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2006.11.029.

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Sharma, Shubham, Shalab Sharma, Mandeep Singh, Parampreet Singh, Rasmeet Singh, Sthitapragyan Maharana, Nima Khalilpoor, and Alibek Issakhov. "Computational Fluid Dynamics Analysis of Flow Patterns, Pressure Drop, and Heat Transfer Coefficient in Staggered and Inline Shell-Tube Heat Exchangers." Mathematical Problems in Engineering 2021 (June 1, 2021): 1–10. http://dx.doi.org/10.1155/2021/6645128.

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In this numerical study, the heat transfer performance of shell-and-tube heat exchangers (STHXs) has been compared for two different tube arrangements. STHX having 21 and 24 tubes arranged in the inline and staggered grid has been considered for heat transfer analysis. Shell-and-tube heat exchanger with staggered grid arrangement has been observed to provide lesser thermal stratification as compared to the inline arrangement. Further, the study of variation in the mass flow rate of shell-side fluid having constant tube-side flow rate has been conducted for staggered grid structure STHX. The ma

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36

Dirkse, Martijn H., Wilko K. P. van Loon, Tom van der Walle, Sebastiaan L. Speetjens, and Gerard P. A. Bot. "A Computational Fluid Dynamics Model for Designing Heat Exchangers based on Natural Convection." Biosystems Engineering 94, no. 3 (July 2006): 443–52. http://dx.doi.org/10.1016/j.biosystemseng.2006.04.007.

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Močnik, Urban, Bogdan Blagojevič, and Simon Muhič. "Numerical Analysis with Experimental Validation of Single-Phase Fluid Flow in a Dimple Pattern Heat Exchanger Channel." Strojniški vestnik – Journal of Mechanical Engineering 66, no. 9 (September 15, 2020): 544–53. http://dx.doi.org/10.5545/sv-jme.2020.6776.

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A plate heat exchanger with a dimple pattern heat plate has a large number of dimples. The shape of dimples defines the characteristics of the plate heat exchanger. Although such heat exchangers have become increasingly popular due to their beneficial characteristics, knowledge of the flow characteristics in such kind of channel is poor. A good knowledge of the flow conditions inside of such channel is crucial for the successful and efficient development of new products. In this paper single-phase water flow in dimple pattern plate heat exchanger was investigated with application of computatio

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Sonjaya, Abeth Novria, Marhaenanto Marhaenanto, Mokhamad Eka Faiq, and La Ode M. Firman. "Analisis Perbandingan Jenis Material Penukar Kalor Plat Datar Aliran Silang Untuk Proses Pengeringan Kayu." Jurnal Teknologi 9, no. 1 (November 30, 2021): 60–71. http://dx.doi.org/10.31479/jtek.v9i1.117.

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The processed wood industry urgently needs a dryer to improve the quality of its production. One of the important components in a dryer is a heat exchanger. To support a durable heat transfer process, a superior material is needed. The aim of the study was to analyze the effectiveness of the application of cross-flow flat plate heat exchangers to be used in wood dryers and compare the materials used and simulate heat transfer on cross-flow flat plate heat exchangers using Computational Fluid Dynamic simulations. The results showed that there was a variation in the temperature out of dry air an

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39

Gizatullin, R. R., S. N. Peshcherenko, and N. A. Lykova. "Simulation of oil cooling of a submersible motor using a heat exchanger." Вестник Пермского университета. Физика, no. 1 (2021): 69–75. http://dx.doi.org/10.17072/1994-3598-2021-1-69-75.

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Submersible motors are part of submersible oil production pumps that convert electrical energy, which is supplied through a cable from VSD, into mechanical energy of pump rotation. Currently, in about 30% of cases, the failure of an electrical submersible pump is due to a failure of the submersible motor. One of the main causes of failures is overheating of the stator winding insulation. Overheating of submersible oil-filled electric motors occurs because more heat is generated inside the motor than is removed through its outer surface. To intensify the heat removal, it is proposed to connect

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40

Mikielewicz, Jarosław, and Dariusz Mikielewicz. "Thermal-hydraulic issues of flow boiling and condensation in organic Rankine cycle heat exchangers." Archives of Thermodynamics 33, no. 1 (August 1, 2012): 41–66. http://dx.doi.org/10.2478/v10173-012-0002-3.

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Thermal-hydraulic issues of flow boiling and condensation in organic Rankine cycle heat exchangers In the paper presented are the issues related to the design and operation of micro heat exchangers, where phase changes can occur, applicable to the domestic micro combined heat and power (CHP) unit. Analysed is the stability of the two-phase flow in such unit. A simple hydraulic model presented in the paper enables for the stability analysis of the system and analysis of disturbance propagation caused by a jump change of the flow rate. Equations of the system dynamics as well as properties of th

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Yu, Qin, Chai, Huang, and Liu. "The Effect of Compressible Flow on Heat Transfer Performance of Heat Exchanger by Computational Fluid Dynamics (CFD) Simulation." Entropy 21, no. 9 (August 25, 2019): 829. http://dx.doi.org/10.3390/e21090829.

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As a part of vehicle thermal management, water-cooled intercoolers play an important role in engine efficiency. The incompressible simulation model was usually applied to estimate the performance of water-cooled intercoolers. In this paper, the computational fluid dynamics (CFD) compressible model is taken to analyze more accurate prediction models. The rate of section change, heat exchange, and the surface friction coefficient are used as the comparison basis of the compressible flow model and incompressible model on the pressurized air side of the water-cooled intercooler. By comparing the s

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42

Salmi, Mohamed, Benameur Afif, Ali Akgul, Rabab Jarrar, Hussein Shanak, Younes Menni, Hijaz Ahmad, and Jihad Asad. "Turbulent flows around rectangular and triangular turbulators in baffled channels a computational analysis." Thermal Science 26, Spec. issue 1 (2022): 191–99. http://dx.doi.org/10.2298/tsci22s1191s.

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The present paper highlights a computational analysis of air-flows around rectangular and triangular turbulators inside baffled heat exchanger channels in order to improve heat transfer between the fluid and their heated areas. The dynamic and thermal fields as well as fluid temperature curves at the outlet of the exchanger are studied. The computational study is conducted by utilizing SIMPLE algorithm with FLUENT system based on the finite volumes. The analysis clearly demonstrated the presence of highly turbulent flows and the appearance of many vortices in various regions of the exchanger.

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Berce, Jure, Matevž Zupančič, Matic Može, and Iztok Golobič. "A Review of Crystallization Fouling in Heat Exchangers." Processes 9, no. 8 (August 1, 2021): 1356. http://dx.doi.org/10.3390/pr9081356.

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A vast majority of heat exchangers suffer from unwanted deposition of material on the surface, which severely inhibits their performance and thus marks one of the biggest challenges in heat transfer. Despite numerous scientific investigations, prediction and prevention of fouling remain unresolved issues in process engineering and are responsible for large economic losses and environmental damage. This review article focuses specifically on crystallization fouling, providing a comprehensive overview of the state-of-the-art of fouling in heat exchangers. The fundamentals of the topic are discus

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44

Huang, Bo Wun, Jung Ge Tseng, and Jao Hwa Kuang. "Vibration of a Tube with the Axial Loads and Fluid." Applied Mechanics and Materials 275-277 (January 2013): 925–29. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.925.

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Vibration of a tube with the fluid and axial load is focused. In a heat exchanger, the tubes are frequently affected by external force and fluid shock waves. Thus, tubes are often found to be vibrated. This vibration may alter the performance of the tubes and global heat exchanger. That a heat exchanger system is weakly coupled as the each tube is coupled to the adjacent one through the fluid is found. To understand the global system dynamics, the dynamics of a tube must be investigated first. In this work, the dynamic properties of a tube with the axial loads are investigated. The Galerkin me

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45

Yasuo, A., and M. P. Paidoussis. "Flow-Induced Instability of Heat-Exchanger Tubes due to Axial Flow in a Diffuser-Shaped, Loose Intermediate Support." Journal of Pressure Vessel Technology 111, no. 4 (November 1, 1989): 428–34. http://dx.doi.org/10.1115/1.3265700.

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In some heat exchangers and steam generators, the flow is predominantly axial, and the external fluid flows between baffled compartments through enlarged holes in the baffles around the heat exchanger tubes. Thus, the tube is subjected to relatively high flow velocities over small portions of its length, in the baffle locations. In this paper, the dynamics of such an idealized system is investigated, involving a cylindrical beam with pinned ends in axial flow, going through a baffle plate of finite thickness at some intermediate point, with small radial clearance. The fluid forces along the tu

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Chen, Tang, and Wei-zong Wang. "Modeling of combustion and hydrodynamics for a coal-fired supercritical boiler with double-reheat cycle." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 4 (February 23, 2019): 1661–75. http://dx.doi.org/10.1108/hff-08-2018-0456.

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Purpose The design and retrofit of the heat exchangers in a boiler should take into account the processes occurring on the side of combustion and steam. For this reason, this study aims to couple a one-dimensional hydrodynamic model of steam with computational fluid dynamics (CFD) simulation of flue gas. Design/methodology/approach Radiant/semi-radiant platen heat exchangers are simplified as plane surfaces for CFD, while convective heat exchangers are introduced into the CFD simulation as energy/momentum absorption sources. Findings Numerical simulation is performed for a 1,000 MWe coal-fired

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Ünverdi, Murat, and Hasan Küçük. "Performance comparison of plate heat exchangers designed using Taguchi method and Computational Fluid Dynamics." Pamukkale University Journal of Engineering Sciences 25, no. 4 (2019): 373–86. http://dx.doi.org/10.5505/pajes.2019.35493.

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48

Ünverdi, Murat, and Hasan Küçük. "Performance comparison of plate heat exchangers designed using Taguchi method and Computational Fluid Dynamics." Pamukkale University Journal of Engineering Sciences 25, no. 4 (2019): 373–86. http://dx.doi.org/10.5505/pajes.2018.35493.

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49

Sakib, Shadman, and Abdullah Al-Faruk. "Flow and Thermal Characteristics Analysis of Plate–Finned Tube and Annular–Finned Tube Heat Exchangers fo In–Line and Staggered Configurations." Mechanics and Mechanical Engineering 22, no. 4 (September 2, 2020): 1407–18. http://dx.doi.org/10.2478/mme-2018-0110.

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AbstractAs the effective selection of fin can greatly enhance the performance of heat exchanger, heat transfer and pressure drop performance on the air-side of annular and rectangular finned tube heat exchangers were numerically investigated. Two types of tube arrangement (in-line and staggered alignment) were examined for 6 different air flow rate for both the heat exchangers using computational fluid dynamics software package ANSYS FLUENT. Renormalization group theory (RNG) based k-ε turbulence model was employed to handle the unsteady three-dimensional flow and the conjugate heat transfer c

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50

Muthusamy, P., and Palanisamy Senthil Kumar. "Waste Heat Recovery Using Matrix Heat Exchanger from the Exhaust of an Automobile Engine for Heating Car’s Passenger Cabin." Advanced Materials Research 984-985 (July 2014): 1132–37. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.1132.

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The main objective of our work is to analysis the heat transfer rate for various fluids with different matrix heat exchanger (MHE) models and flow characteristic in matrix heat exchanger by using computational fluid dynamics (CFD) package with small car. The amount of heat carried by the cold fluid from hot fluid is mainly depends upon the mass flow rate of the working fluid. The heat transfer area per unit volume of tube is more. So, it increases the temperature of the cold fluid. Here, the hot and cold fluids are moving in the alternate tubes of heat exchanger in the counter flow direction.

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