Journal articles: 'Numerical simulation of plate heat exchangers'

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Ji, Chang Fa, Xiao Bing Liu, and Rui Liu. "Numerical Simulation of Heat Transfer Characteristics of Dimpled Plate." Applied Mechanics and Materials 170-173 (May 2012): 2686–92. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2686.

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Designed a new type of plate heat exchanger-dimpled plate heat exchanger, then conducted a three-dimensional numerical simulation on flow, heat transfer and resistance characteristics of 15 kinds of different sizes dimpled plate heat exchangers by Fluent software，obtains the impact of the dimples geometric parameters such as dimple diameter, dimple spacing, dimple height on the heat transfer and flow characteristics. The results show that in different Reynolds number, dimple diameter, dimple spacing and dimple height on the effect of the dimple plate heat transfer efficiency is quite similar, and the impact becomes increasingly evident with the Reynolds numbers increasing. The combined effect of plate heat exchanger is best when dimple diameter, dimple spacing, dimple height are separately 12mm, 21mm, 4mm in the 15 kinds of different combination dimpled plates.

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Tian, Jin Jin, Zhe Zhang, and Yong Gang Guo. "Thermal Simulation of Plate-Fin Heat Exchangers." Applied Mechanics and Materials 291-294 (February 2013): 1623–26. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1623.

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Plate-fin heat exchangers are playing an important role in the power and process industry in the recent past. Hence, it has become necessary to model their temperature response accurately. A new mathematical model of plate-fin heat exchanger is proposed, considering the heat conduction resistance along the fins and the separating plates. The effects of fin geometrical parameters and spacer thickness on the performances of the heat exchanger have been numerically calculated. It is found that the heat conduction resistance of fins has significant influence on the outlet fluid temperature variation. The analysis presented here suggests a better method of heat-transfer data analysis for plate heat exchangers.

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Zhang, Zhe, Jin Jin Tian, and Yong Gang Guo. "CFD Simulation on Flow Distribution in Plate-Fin Heat Exchangers." Advanced Materials Research 655-657 (January 2013): 445–48. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.445.

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The influences of the conventional header configuration used in industry at present on the fluid flow distribution in plate-fin heat exchanger were numerically investigated. The numerical results showed that the fluid flow maldistribution is very serious in the heat exchanger. The header configuration with perforated plate was brought forward for the first time. The computational results indicated that the improved header configuration can effectively improve the performance of fluid flow distribution in the heat exchanger. The fluid flow distribution for the header configuration with curving perforated plate is more uniform than for the header configuration with plane perforated plate. The absolute degree of fluid flow nonuniformity in plate-fin heat exchanger has reduced from 3.47 to 0.32 by changing the header configuration. The numerical results are compared with the experimental results. They are basically consistent which indicates that the mathematical model and the calculating method are reliable.

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Piepiórka-Stepuk, Joanna, and Marek Jakubowski. "NUMERICAL STUDIES OF FLUID FLOW IN FLAT, NARROW-GAP CHANNELS SIMULATING PLATE HEAT EXCHANGER." Chemical and Process Engineering 34, no. 4 (December 1, 2013): 507–14. http://dx.doi.org/10.2478/cpe-2013-0041.

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Abstract The aim of this work was to present the numerical simulation results determining the distributions of flow velocity and pressure in the individual channels of a plate heat exchanger. The simulations have been conducted by means of the Finite Volume Method (FVM) of numerical computation using the ANSYS CFX software. The computational model constituted spaces between 10 flat, straight flow type plates of the heat exchanger. The obtained results of numerical simulations confirm the presence of inhomogeneous flow conditions in the neighbouring channels between the plates. The computations enabled to point out the regions on the plates, in which insufficient flow can result in problems with their cleaning. The results of this work constitute the first part of a research leading to an assessment of cleaning conditions in plate heat exchangers.

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Allymehr, Ehsan, Geir Skaugen, Torsten Will, Ángel Álvarez Pardiñas, Trygve Magne Eikevik, Armin Hafner, and Lena Schnabel. "Numerical Study of Hydrocarbon Charge Reduction Methods in HVAC Heat Exchangers." Energies 14, no. 15 (July 24, 2021): 4480. http://dx.doi.org/10.3390/en14154480.

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Required refrigerant charge in heat pump systems with propane is analyzed. Two systems are compared: the first a direct heat pump, with fin-and-tube heat exchangers, and the second an indirect system, with plate heat exchangers with an additional brine-to-air heat exchanger. Each system was considered to be able to work reversibly, with 5 kW design cooling capacity in summer and 8 kW design heating capacity in winter. Two separately developed simulation codes were used to calculate the required refrigerant charge and the efficiency of each of the systems. The charge was reduced by the use of microfinned tubes up to 22% in direct system reduced using microfinned tubes compared to the smooth tube. For the indirect system using specially designed plate heat exchangers with the minimum internal volume, their charge was reduced by up to 66% compared to normal plate heat exchangers.

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Tian, Shu-Ling, Ying-Ying Shen, Yao Li, Hai-Bo Wang, Sheryar Muhammad, and Hai-Qing Si. "Numerical simulation of flow distribution in the header of plate-fin heat exchanger." International Journal of Modern Physics B 34, no. 14n16 (April 20, 2020): 2040111. http://dx.doi.org/10.1142/s0217979220401116.

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Plate-fin heat exchangers are widely used in industry at present due to their compact structure and high efficiency. However, there is a problem of flow maldistribution, resulting in poor performance of heat exchangers. The influence of the header configuration on fluid flow distribution is studied by using CFD software FLUENT. The numerical results show that the fluid flow inside the header is seriously uneven. The reliability of the numerical simulation is validated against the published results. They are found to be basically consistent within considerable error. The optimal number of the punch baffle is investigated. Various header configuration with different opening ratios have been studied under the same boundary conditions. The gross flow maldistribution parameter (S) is used to evaluate flow nonuniformity, and the flow maldistribution parameters of different schemes under different Reynolds numbers are listed and compared. The optimal header with minimum flow maldistribution parameter is obtained through the performance analysis of headers. It is found that the flow maldistribution of the improved header is significantly smaller compared with the conventional header. Hence, the efficiency of the heat exchanger is effectively enhanced. The conclusion provides a reference for the optimization design of plate-fin heat exchanger.

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Wang, Zhenyu, Jie Wang, Ma Yunhai, and Lining Wang. "Structural optimization design and heat transfer characteristics of multi-degree-of-freedom spiral plate type agricultural machinery equipment heat exchanger." Thermal Science 23, no. 5 Part A (2019): 2525–33. http://dx.doi.org/10.2298/tsci181115140w.

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In agricultural equipment, heat exchangers are mainly used for heat exchange and full utilization. Based on the theory of enhanced heat transfer, we establish a reasonable mathematical model and physical model for the multi-degree-of-freedom spiral plate type agricultural machinery heat exchanger, and use the FLUENT numerical simulation software to add the spiral disturbing fluid to the spiral plate heat exchanger flow channel. Numerical simulation and further optimization simulation of the fluid-conducting conditions with poor heat transfer effect were carried out, and an optimal arrangement of two kinds of spiral-shaped turbulent fluids with constant curvature and variable curvature was determined. The heat transfer effect of the fixed-curvature spiral-shaped disturbing fluid is superior. Further optimize the structure of the disturbing fluid. When the diameter of the disturbing fluid increases, the heat transfer can be enhanced; thus, the diameter of the disturbing fluid plays an important role in enhancing the heat transfer effect.

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Jain, Sanjeev, Aniruddha Joshi, and P. K. Bansal. "A New Approach to Numerical Simulation of Small Sized Plate Heat Exchangers With Chevron Plates." Journal of Heat Transfer 129, no. 3 (August 4, 2006): 291–97. http://dx.doi.org/10.1115/1.2430722.

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A numerical and experimental study of heat transfer and fluid flow in a single pass counter flow plate heat exchanger with chevron plates has been presented in this paper. CFD analysis of small sized plate heat exchanger was carried out by taking the complete geometry of the heat transfer surface and more realistic hydrodynamic and thermal boundary conditions. A cold channel with two chevron plates and two halves of hot channels on either side having flat periodic boundaries was selected as the computational domain. The numerical model was validated with data from experiments and empirical correlations from literature. Heat transfer and pressure drop data were obtained experimentally with water as the working fluid, in the Reynolds number range 400–1300 and the Prandtl number range 4.4–6.3.

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WEN, Jue. "Numerical Simulation of New Combined Plate Heat Exchangers and Distribution Region." Journal of Mechanical Engineering 52, no. 2 (2016): 150. http://dx.doi.org/10.3901/jme.2016.02.150.

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Zhang, Ji-Min, Shi-Ting Ruan, Jian-Guang Cao, and Tao Xu. "Flow and heat transfer performance of plate phase change energy storage heat exchanger." Thermal Science 23, no. 3 Part B (2019): 1989–2000. http://dx.doi.org/10.2298/tsci170821072z.

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In the present work, the phase change energy storage heat exchanger in thermal control system of short-time and periodic working satellite payloads is taken as the research object. Under the condition of constant heated power of the satellite payload, the heat transfer characteristics of phase change energy storage heat exchanger are analyzed by numerical simulation and experimental method. The heat exchanger with fin arrays to enhance heat transfer is filled with tetradecane, whose density varies with temperature. The flow field distribution, the solid-liquid distribution, the temperature distribution, and the phase change process in the plate phase change energy storage heat exchanger unit are analyzed. The flow and heat transfer characteristics of heat exchangers under different fluid-flow rates and temperature were investigated.

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Yu, Chao, Xiangyao Xue, Kui Shi, and Mingzhen Shao. "A Three-Dimensional Numerical and Multi-Objective Optimal Design of Wavy Plate-Fins Heat Exchangers." Processes 9, no. 1 (December 23, 2020): 9. http://dx.doi.org/10.3390/pr9010009.

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This paper presents a method for optimizing wavy plate-fin heat exchangers accurately and efficiently. It combines CFD simulation, Radical Basis Functions (RBF) with multi-objective optimization to improve the performance. The optimization of the Colburn factor j and the friction coefficient f is regarded as a multi-objective optimization problem, due to the existence of two contradictory goals. The approximation model was obtained by Radical Basis Functions, and the shape of the heat exchanger was optimized by multi-objective genetic algorithm (MOGA). The optimization results showed that j increased by 17.62% and f decreased by 20.76%, indicating that the heat exchange efficiency was significantly enhanced and the fluid structure resistance reduced. Then, from the aspects of field synergy and tubulence energy, the performance advantage of the optimized structure was further confirmed.

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Manigandan, N., and M. Suresh. "Numerical Investigation of a Chevron Type Brazed Plate Heat Exchanger." Applied Mechanics and Materials 787 (August 2015): 222–26. http://dx.doi.org/10.4028/www.scientific.net/amm.787.222.

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A numerical investigation has been carried out in the present work to study flow characteristics and thermal performance of a chevron type brazed plate heat exchanger (PHE). A local element-by-element analysis utilizing e-NTU method is employed for simulating the heat exchanger. In this approach, Nusselt number is expressed in terms of friction factor which in turn, is given as a function of chevron angle of the heat exchanger. Water has been used as cold and hot fluid. Effect of fluid flow rate and inlet temperatures on the heat duty, overall heat transfer coefficient, fluid outlet temperatures and pressure drop have been studied. When compared with literature results of intermating plate heat exchangers, chevron type plate heat exchanger gives greater heat transfer enhancement, though with increased pressure drop.

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Tomic, Mladen, Predrag Zivkovic, Biljana Milutinovic, Mica Vukic, and Aleksandar Andjelkovic. "Experimental and numerical investigation of thermal and fluid-flow processes in a matrix heat exchanger." Thermal Science 23, no. 1 (2019): 11–21. http://dx.doi.org/10.2298/tsci161028174t.

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The need for compact heat exchangers has led to the development of many types of surfaces that enhance the rate of heat transfer, among them the matrix heat exchangers. These heat exchangers consist of a series of perforated plates mutually separated and sealed by spacers. The goal of this research was to investigate the heat transfer process of matrix heat exchangers on the air side, at the close to ambient conditions. The research was conducted in two directions ? experimental research and CFD research. The experimental investigation was carried out over a perforated plate package with the porosity of 25.6%. The air/water matrix heat exchanger was heated by hot water and was installed in an experimental chamber at which entrance was a fan with the variable flow rate and heated by hot water. The thermocouples were attached to the surface of the perforated plate at the upwind and downwind sides, as well as at the inlet and the outlet of the chamber. During each experiment, the thermocouple readings and the air and water-flow and temperatures were recorded. In the numerical part of the research, the matrix heat exchangers with different plate porosity from 10 to 50% were investigated. The results of the numerical simulations were validated against the experimental results. On the basis of the experimental and numerical results, equations for heat transfer as the function of Reynolds number and geometrical parameters was established.

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Huang, Haoran, and Artur Jaworski. "Numerical simulation of the effect of plate spacing on heat transfer characteristics within a parallel-plate heat exchanger in a standing wave thermoacoustic system." E3S Web of Conferences 116 (2019): 00028. http://dx.doi.org/10.1051/e3sconf/201911600028.

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Power can be converted with high efficiently between thermal energy and mechanical (acoustic) energy by using thermoacoustic technologies. Thus, the heat transfer characteristics are significant to the understanding of mechanisms, and improvement of efficiency for thermoacoustic devices, notably in heat exchangers. This paper introduces a two-dimensional computational fluid dynamics model of flow across a parallel-plate heat exchanger and investigates the effect of plate spacing on heat transfer characteristics. The open source CFD software OpenFOAM is applied because of the highly customizable capabilities to vary the control parameters. Firstly, the computational model including geometry, boundary conditions, equations, discretization scheme, turbulence and thermophysical properties’ models are presented, and then grid-independence validation is presented to verify the quality of mesh. The simulation results show that plate spacing influences the heat transfer between plates and adjacent area of heat exchanger, and the heat transfer coefficient goes up when the plate spacing decreases. The analysis also indicates that a possible flow transition to turbulence occurred within Re number between 247.2 and 321.4. The results in this work can help the understanding of heat transfer inside thermoacoustic system, and form a basis for future research.

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Pan, Minqiang, Hongqing Wang, Yujian Zhong, Tianyu Fang, and Xineng Zhong. "Numerical simulation of the fluid flow and heat transfer characteristics of microchannel heat exchangers with different reentrant cavities." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 11 (November 4, 2019): 4334–48. http://dx.doi.org/10.1108/hff-03-2019-0252.

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Purpose With the increasing heat dissipation of electronic devices, the cooling demand of electronic products is increasing gradually. A water-cooled microchannel heat exchanger is an effective cooling technology for electronic equipment. The structure of a microchannel has great impact on the heat transfer performance of a microchannel heat exchanger. The purpose of this paper is to analyze and compare the fluid flow and heat transfer characteristic of a microchannel heat exchanger with different reentrant cavities. Design/methodology/approach The three-dimensional steady, laminar developing flow and conjugate heat transfer governing equations of a plate microchannel heat exchanger are solved using the finite volume method. Findings At the flow rate range studied in this paper, the microchannel heat exchangers with reentrant cavities present better heat transfer performance and smaller pressure drop. A microchannel heat exchanger with trapezoidal-shaped cavities has best heat transfer performance, and a microchannel heat exchanger with fan-shaped cavities has the smallest pressure drop. Research limitations/implications The fluid is incompressible and the inlet temperature is constant. Practical implications It is an effective way to enhance heat transfer and reduce pressure drop by adding cavities in microchannels and the data will be helpful as guidelines in the selection of reentrant cavities. Originality/value This paper provides the pressure drop and heat transfer performance analysis of microchannel heat exchangers with various reentrant cavities, which can provide reference for heat transfer augmentation of an existing microchannel heat exchanger in a thermal design.

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KUROSE, Kizuku, Shuntaro YANAGIHARA, Kazushi MIYATA, Yoshinori HAMAMOTO, and Hideo MORI. "Experiment and numerical simulation of flow characteristics in chevron type plate heat exchangers." Transactions of the JSME (in Japanese) 84, no. 862 (2018): 17–00593. http://dx.doi.org/10.1299/transjsme.17-00593.

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Ferhat, Rabia, Ahmed Zine Dinne Dellil, and M. Kamal Hamidou. "Numerical Investigation and Thermal Transfer on a Wall Corrugated without and with Artificial Roughness." Defect and Diffusion Forum 392 (April 2019): 189–99. http://dx.doi.org/10.4028/www.scientific.net/ddf.392.189.

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The objective of this study is to give the designer an appreciation of the heat transfer enhancement in turbulent flows through corrugated channels in a heat plate exchanger. Precisely, the influence of a new technic named the artificial roughness is probed on corrugated walls, with their variable wall amplitudes for assessing the effectiveness of the heat exchange. For that purpose, a numerical simulation approach is adopted. The rectangular, triangular, trapezoidal and sinusoidal corrugated wall and artificial roughness wall shapes are investigated, in order to determine the optimal wall profile resulting in significance increase in the heat exchange process with a minimum friction loss. The numerical results are presented in the form of isotherms, streamlines, contour, Nusselt number (Nu) and friction coefficient (Cf) using commercial software ANSYS- Fluent where the Reynolds number is in the range from 3 000 to 12 000. Our simulations reveal that the sinusoidal-corrugated channel has the highest heat transfer enhancement followed by rectangular, triangular and trapezoidal-corrugated channel. In addition, introduction of artificial roughness in the wavy channel induces stronger secondary flow which makes the flow three-dimensional and improve the heat transfer by a maximum 40% at a Reynolds number equal to 12 000. This may indicate benefits for designing heat plate compact exchangers capable of higher performances in the turbulent flow regimes.

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Sözen, Adnan, Ataollah Khanları, and Erdem Çiftçi. "Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement." International Journal of Renewable Energy Development 8, no. 1 (February 2, 2019): 27. http://dx.doi.org/10.14710/ijred.8.1.27-32.

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Plate heat exchangers, a compact-type heat exchanger, are commonly used heat transfer devices because of their superior characteristics. Their thermal performances are strongly dependent to working fluid circulating inside the system. The influences of nanofluid utilization as the working fluid in a plate heat exchanger was experimentally and numerically analysed in this study. In order to show off the improvement rate in heat transfer, the experiments were performed by using deionized water and TiO2-deionized water nanofluid. The nanofluid was prepared at the rate of 1.5 % as weighted. A surface-active agent, Triton X-100, was also doped into the mixture at the rate of 0.2% of a final concentration to prevent the sedimentation and flocculation of the nanoparticles inside the solution. The experiments were performed in different temperatures as 40°C, 45°C, 50°C and varying cold fluid mass flow rates as 3,4, 5, 6 and 7 lpm. In addition, using the experimental data, a numerical simulation was realized by ANSYS Fluent software. The both results indicate that heat transfer rate in plate heat exchanger can be improved using nanofluid as the working fluid in place of deionized water. The maximum improvement rate in heat transfer was obtained as 11 % in experimental study. It is also seen that experimental and numerical results are in good agreement.©2019. CBIORE-IJRED. All rights reservedArticle History: Received May 18th 2018; Received in revised form October 17th 2018; Accepted January 8th 2019; Available onlineHow to Cite This Article: Sözen, A., Khanlari, A., and Çiftçi, E. (2019) Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement. Int. Journal of Renewable Energy Development, 8(1), 27-32.https://doi.org/10.14710/ijred.8.1.27-32

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Yamagishi, Shunta, Yoshiki Mikami, Kenji Otani, Norihiro Hisada, Shigeru Aoki, and Masahito Mochizuki. "Numerical Simulation of Relationship Between Member Dimension and Weld-induced Stress in Plate-fin Type Heat Exchanger." QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 35, no. 2 (2017): 71s—74s. http://dx.doi.org/10.2207/qjjws.35.71s.

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Jiang, Xue, Ji Hua Bao, Yan Yu, and Ming Xia Gu. "The Numerical Simulation of Air-Cooled Plate-Fin Heat Exchanger." Advanced Materials Research 314-316 (August 2011): 1472–77. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1472.

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According to the periodic structure of the plate-fin heat exchanger, 3D model of the heat exchanger is established which simplifies the computation amount of the numerical simulation on flow field and temperature field. The relationship of fluid velocity, temperature, pressure drop and heat transfer coefficient is analyzed. The flow and heat transfer characteristics can be well predicted. Based on the simulation results, the conclusion makes reference to the design of plate-fin heat exchanger.

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Zhang, Shaozhi, Xiao Niu, Yang Li, Guangming Chen, and Xiangguo Xu. "Numerical simulation and experimental research on heat transfer and flow resistance characteristics of asymmetric plate heat exchangers." Frontiers in Energy 14, no. 2 (March 20, 2020): 267–82. http://dx.doi.org/10.1007/s11708-020-0662-7.

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QIU, Jia. "Research on Performance of Distributors Used in Plate Heat Exchangers Based on CFD Numerical Simulation." Journal of Mechanical Engineering 46, no. 14 (2010): 130. http://dx.doi.org/10.3901/jme.2010.14.130.

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Bai, Chao, Guanmin Zhang, Yan Qiu, Xueli Leng, and Maocheng Tian. "A new method for heat transfer and fluid flow performance simulation of plate heat exchangers." Numerical Heat Transfer, Part B: Fundamentals 75, no. 2 (February 2019): 93–110. http://dx.doi.org/10.1080/10407790.2019.1607117.

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Amadeh, Ali, Mohammad Habibi, and Ali Hakkaki-Fard. "Numerical simulation of a ground-coupled heat pump system with vertical plate heat exchangers: A comprehensive parametric study." Geothermics 88 (November 2020): 101913. http://dx.doi.org/10.1016/j.geothermics.2020.101913.

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Żukowski, Witold, Przemysław Migas, Monika Gwadera, Barbara Larwa, and Stanisław Kandafer. "A numerical analysis of heat transfer in a cross-current heat exchanger with controlled and newly designed air flows." Open Chemistry 16, no. 1 (August 3, 2018): 627–36. http://dx.doi.org/10.1515/chem-2018-0068.

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AbstractSimulations of heat transfer between air and flue gases in a plate heat exchanger are presented. The device was designed for the heating of the air supplying a fluidised furnace for the combustion of wet sludge and wood crumbs. The locations of inlets and outlets and the geometry of the heat exchanger are determined by the construction of the furnace. The aim of the simulations was to increase effectiveness of heat transfer through the use of flow redirections with additional baffles placed in the air chamber. The results of the simulations showed that a substantial part of the heat exchanger without baffles is not used effectively. On the basis of a velocity profile, a temperature distribution and a wall heat flux, the geometry of the inter-plate space within the air chamber was modified by adding baffles. The unmodified exchangers had 77% efficiency in comparison to counter-current exchangers with the same heat transfer area. After the application of baffles, the efficiency increased to 83-91% depending on the construction used (one, two or three baffles). The best model variant of the exchanger with baffles led to the increase in the temperature of air supplying the fluidised bed by approximately 76 K in relation to the system without baffles . Unexpectedly, the presented modifications of the geometry of the system had very low influence of the flow resistance in the air chamber. The value of Δp for the system without baffles is almost the same as for the best model variant.

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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 ultra-supercritical boiler. The calculation results are validated by the thermodynamic design data. Tube outside surface temperature, as well as ash deposit temperature distributions, are obtained. Originality/value Complex tube arrangements can be completed with the aid of AutoCAD, and therefore, the simulation could offer detailed information of heat exchangers. In a word, a more reliable modeling of the whole steam generation process is achieved.

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Aguilar Osorio, Rita, and Keith Cliffe. "Numerical Simulation of Heat Losses between a Partition Plate and the Wall of the Head of a Plastic Heat Exchanger." Defect and Diffusion Forum 297-301 (April 2010): 650–55. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.650.

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For this research it was considered that the heat exchanger was affected by leakage in the head across the partition plate and the wall between the tube passes. Leakage was a problem in the plastic shell and tube heat exchanger, because it was difficult to seal the partition plate to the head of the exchanger. The material used for manufacturing the heat exchanger was polyvinylidene fluoride, PVDF. In order to predict the amount of flow leaking through the clearances of the tube passes, a numerical simulation was carried out using the computational Fluid Dynamics CFD Fluent Software. To obtain the percentage of the heat loss across the 4 tube passes, different clearance sizes between the partition plate and the wall of the head of the exchanger were analysed. For the smaller clearance size of 0.2 mm the heat transfer coefficient was reduced up to 15%. These results suggest that the flow mass bypassing the head between tube passes affect the results of the heat transfer coefficient and confirm the experimental observation, that its performance was affected by leakage between tube passes. This research served as an extension of the preliminary plastic heat exchanger design.

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Zhou, Jun Jie, Hui Wang, Ding Biao Wang, and Kang Zhang. "Numerical Simulation Research on Louver Fin in Air Conditioning for Cars." Advanced Materials Research 383-390 (November 2011): 6463–68. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6463.

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Heat transfer and fluid flow on the air side for heat exchanger in the air conditioning system are numerically simulated by FLUENT commercial software. Numerical analysis is conducted on the plate louver fin, the sinusoid louver fin and the leaf louver fin when the inlet velocity rang is from 2m/s to 7m/s. Heat transfer factor and friction coefficient are respectively fitted with the Reynolds number by the correlation. The sinusoid louver fin is found to have the best comprehensive heat transfer performance. Not only the leaf louver fin’s comprehensive heat transfer performance is good, but also its pressure drop loss is 28.1%~38.8% lower than that of plate louver fin

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Kim, Myung-Ho, Van Toan Nguyen, Sunghyuk Im, Yohan Jung, Sun-Rock Choi, and Byoung-Jae Kim. "Experimental Validation of Flow Uniformity Improvement by a Perforated Plate in the Heat Exchanger of SFR Steam Generator." Energies 14, no. 18 (September 15, 2021): 5846. http://dx.doi.org/10.3390/en14185846.

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The steam generator in a nuclear power plant is a type of heat exchanger in which heat transfer occurs from the hot fluid in multiple channels to the cold fluid. Therefore, a uniform flow over multiple channels is necessary to improve heat exchanger efficiency. The study aims at experimentally investigating the improvement of flow uniformity by the perforated plate in the heat exchanger used for a sodium-cooled fast reactor stream generator. A 1/4-scale experimental model for one heat exchanger unit with 33 × 66 channels was manufactured. The working fluid was water. A perforated plate was systematically designed using numerical simulations to improve the flow uniformity over the 33 × 66 channels. As a result, the flow uniformity greatly improved at a slight cost of pressure drop. To validate the numerical results, planar particle image velocimetry measurements were performed on the selected planes in the inlet and outlet headers. The experimental velocity profiles near the exits of the channels were compared with numerical simulation data. The experimental profiles agreed with the numerical data well. Both the numerical simulation and the experimental results showed a slight increase in pressure drop, despite significant improvement in the flow uniformity.

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Muszyński, Tomasz, and Sławomir Marcin Kozieł. "Parametric study of fluid flow and heat transfer over louvered fins of air heat pump evaporator." Archives of Thermodynamics 37, no. 3 (September 1, 2016): 45–62. http://dx.doi.org/10.1515/aoter-2016-0019.

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Abstract Two-dimensional numerical investigations of the fluid flow and heat transfer have been carried out for the laminar flow of the louvered fin-plate heat exchanger, designed to work as an air-source heat pump evaporator. The transferred heat and the pressure drop predicted by simulation have been compared with the corresponding experimental data taken from the literature. Two dimensional analyses of the louvered fins with varying geometry have been conducted. Simulations have been performed for different geometries with varying louver pitch, louver angle and different louver blade number. Constant inlet air temperature and varying velocity ranging from 2 to 8 m/s was assumed in the numerical experiments. The air-side performance is evaluated by calculating the temperature and the pressure drop ratio. Efficiency curves are obtained that can be used to select optimum louver geometry for the selected inlet parameters. A total of 363 different cases of various fin geometry for 7 different air velocities were investigated. The maximum heat transfer improvement interpreted in terms of the maximum efficiency has been obtained for the louver angle of 16 ° and the louver pitch of 1.35 mm. The presented results indicate that varying louver geometry might be a convenient way of enhancing performance of heat exchangers.

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Jin, Mei, Li Zhan, Han Lin Wu, and Hong Jiao Liu. "Structure Size on the Heat Transfer Performance of Shell and Tube Heat Exchanger." Applied Mechanics and Materials 778 (July 2015): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amm.778.37.

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In this paper, based on the numerical simulation with RNG k-ε model by using commercial code of FLUENT, the effects of the structure size of the shell and tube heat exchanger, such as the baffle spacing and the gap height of baffle plate, on the pressure drop, the heat transfer coefficient and j-f Factor were investigated to obtain the relationship between the baffle spacing and the gap height of baffle plate using the same thermophysical conditions. The numerical simulation results exhibited that there was a non-monotonic relationship between the baffle spacing and the gap height of baffle plate. A better heat transfer performance could be observed under the condition of a smaller value of the baffle spacing and a higher value of the ratio of the gap height to the actual section, or under the condition of a higher value of the baffle spacing and a smaller value of the ratio of the gap height to the actual section. Moreover, under the optimum geometrical condition, the numerical simulation results showed that a smaller difference between the inlet section length and the baffle spacing could give a higher j-f Factor and a better heat transfer performance.

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Sauve´, R. G., and W. W. Teper. "Impact Simulation of Process Equipment Tubes and Support Plates—A Numerical Algorithm." Journal of Pressure Vessel Technology 109, no. 1 (February 1, 1987): 70–79. http://dx.doi.org/10.1115/1.3264858.

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The occurrence of flow-induced vibration fretting wear in process equipment such as heat exchangers and steam generators accounts for the majority of the failures due to vibration. One of the parameters which plays a vital role in the prediction of tube wear rate is the impact force which occurs when the free displacements of the tube exceed the clearance in the support plates, resulting in a collision. To date the determination of these impact forces reported in the literature has been restricted to simplified mathematical models which consider only straight spans of tube with gaps. The need to consider more generalized configurations has led to the development of an analytical method which simulates the nonlinear dynamic-impact response of multi-supported tubes including U-bends and the effect of nonuniform gap clearances at the supports. The approach is incorporated into a computer code based on the finite element and displacement methods using an unconditionally stable numerical integration scheme to solve the nonlinear equations of motion. The algorithm developed includes equilibrium iteration and variable time stepping based on convergence criteria, which ensures that temporal solution errors are minimized. The direct integration of the equations enables all the frequencies (subject to the finite element mesh) to be included. This is necessary since the high-frequency response at impacting may be significant. At present, the method is being used to simulate impact between tubes and support plates in steam generators and heat exchangers in order to determine tube bundle susceptibility to fretting wear failure at the design stage or operational phase. The paper describes the analytical development of the method, verification cases, and applications to the problem of tube/support plate impacting.

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Nemoda, Stevan, Dimosthenis Trimis, and Goran Zivkovic. "Numerical simulation of porous burners and hole plate surface burners." Thermal Science 8, no. 1 (2004): 3–18. http://dx.doi.org/10.2298/tsci0401003n.

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In comparison to the free flame burners the porous medium burners, especially those with flame stabilization within the porous material, are characterized by a reduction of the combustion zone temperatures and high combustion efficiency, so that emissions of pollutants are minimized. In the paper the finite-volume numerical tool for calculations of the non-isothermal laminar steady-state flow, with chemical reactions in laminar gas flow as well as within porous media is presented. For the porous regions the momentum and energy equations have appropriate corrections. In the momentum equations for the porous region an additional pressure drop has to be considered, which depends on the properties of the porous medium. For the heat transfer within the porous matrix description a heterogeneous model is considered. It treats the solid and gas phase separately, but the phases are coupled via a convective heat exchange term. For the modeling of the reaction of the methane laminar combustion the chemical reaction scheme with 164 reactions and 20 chemical species was used. The proposed numerical tool is applied for the analyses of the combustion and heat transfer processes which take place in porous and surface burners. The numerical experiments are accomplished for different powers of the porous and surface burners, as well as for different heat conductivity character is tics of the porous regions.

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Guo, Z., J. Shan, J. Li, and Levtsev. "Numerical Simulation of The Effect of Baffle on Heat Transfer Performance of Shell-and-Tube Heat Exchanger." Bulletin of Science and Practice 7, no. 1 (January 15, 2021): 248–53. http://dx.doi.org/10.33619/2414-2948/62/24.

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Baffle heat exchanger is widely used in various production activities because of its simple design and strong adaptability, so the structural optimization of baffle heat exchanger is of great significance to engineering practice. COMSOL software was used to simulate the shell-and-tube heat exchanger with baffles. By comparing and analyzing the simulation results, we find that the temperature field and pressure field of baffle plate are distributed evenly; The existence of baffles leads to the transverse flow of air, which increases the heat exchange area. Another advantage of using baffles is that vibration due to fluid flow can be reduced.

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Skočilas, Jan, and Ievgen Palaziuk. "CFD SIMULATION OF THE HEAT TRANSFER PROCESS IN A CHEVRON PLATE HEAT EXCHANGER USING THE SST TURBULENCE MODEL." Acta Polytechnica 55, no. 4 (August 31, 2015): 267. http://dx.doi.org/10.14311/ap.2015.55.0267.

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<p>This paper deals with a computational fluid dynamics (CFD) simulation of the heat transfer process during turbulent hot water flow between two chevron plates in a plate heat exchanger. A three-dimensional model with the simplified geometry of two cross-corrugated channels provided by chevron plates, taking into account the inlet and outlet ports, has been designed for the numerical study. The numerical model was based on the shear-stress transport (SST) <em>k-!</em> model. The basic characteristics of the heat exchanger, as values of heat transfer coefficient and pressure drop, have been investigated. A comparative analysis of analytical calculation results, based on experimental data obtained from literature, and of the results obtained by numerical simulation, has been carried out. The coefficients and the exponents in the design equations for the considered plates have been arranged by using simulation results. The influence on the main flow parameters of the corrugation inclination angle relative to the flow direction has been taken into account. An analysis of the temperature distribution across the plates has been carried out, and it has shown the presence of zones with higher heat losses and low fluid flow intensity.</p>

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Zhao, Yu Han, Yi Fan Wu, Hai Jin Cheng, and Guo Lei Zhu. "Numerical Simulation of Corrugated Depth on the Performance of Plate Heat Exchanger." Advanced Materials Research 860-863 (December 2013): 696–99. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.696.

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In this paper the numerical simulation is performed by using the CFD soft FLUENT. A 3D geometric model is established and whose mesh is generated. The fields of the temperature, pressure and velocity in the computational domain are simulated. And the effect of the corrugation depth on the heat transfer and flow is analyzed.

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Xu, Zhiming, Yu Zhao, Zhimin Han, and Jingtao Wang. "Numerical simulation of calcium sulfate (CaSO4) fouling in the plate heat exchanger." Heat and Mass Transfer 54, no. 7 (January 20, 2018): 1867–77. http://dx.doi.org/10.1007/s00231-018-2282-x.

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Guo and Ye. "Numerical and Experimental Study on a High-Power Cold Achieving Process of a Coil-Plate Ice-Storage System." Energies 12, no. 21 (October 25, 2019): 4085. http://dx.doi.org/10.3390/en12214085.

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Heat dissipation of high-power lasers needs a cold storage and supply system to provide sufficient cooling power. A compact coil-plate heat exchange device has been proposed and applied in the phase-change cold storage system with ice as the cold-storage medium and glycol aqueous solution as the coolant. The heat exchanger consists of several stacked coil-plate units and each unit is constructed with a flat plate and serpentine coils welded on the plate. A simulation model on the cold achieving process of a coil-plate unit was built and verified by the corresponding experiment. The influences of the structural parameters (tube diameter, tube pitch, and plate spacing) of the unit and the inlet temperature and volume flow rate of the coolant on the heat exchange power density were analyzed to obtain the maximal cooling effect in a limited time period. It was found that the heat exchange power density is limited when the tube pitch and plate spacing are large, otherwise, the effective cooling time period is limited. A small plate spacing can make the power density decrease rapidly in the later stage. The inlet coolant temperature can significantly affect the heat exchange power density while the coolant volume flow rate in tube has a small effect on the power density when the coolant is in turbulent state. In a time period of 900 s, for a coil-plate heat exchanger with a plate size of 940 mm ×770 mm and a tube pitch of 78 mm, when the plate spacing is 20 mm, the average heat exchange power density is 5.1 kW/m2 when the inlet temperature and volume flow rate of the coolant are 20 °C and 0.5 m3/h, respectively. The total cooling power of several stacked coil-plate units in the limited time period can match the high requirement of laser heat dissipation.

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Wang, Jin Wu, Si Chen, Rui Feng Chi, and Xi Lu Zhao. "Study on the Structure Parameters Simulation and Optimization for Stamping Quality of Plate Heat Exchanger." Applied Mechanics and Materials 789-790 (September 2015): 300–305. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.300.

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CAD / CAE model of plate structure is designed for plate heat exchanger provided by the manufacturer. Stamping process of the plate is simulated using Dynaform which is the special software of numerical simulation for sheet metal. The quality of plate stamping is analyzed by thinning rate, forming limit diagram (FLD) and other indicators, and compared with practical problems. At the same time, twelve levels experiments programs including ripple inclination, ripple normal pitch and ripple height are established according to uniform design principles based the parameters of ripple structure provided by manufacturer, and twelve chevron ripple plate models is established and their forming quality is analyzed with Dynaform Software. Influence and laws of plates three structural parameters, plates’ section parameters , BHF for stamping quality are studied and summarized, and the optimal choice of the plates is fond out to provide a theoretical basis for the actual production.

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Li, Yao, Haiqing Si, Jingxuan Qiu, Yingying Shen, Peihong Zhang, and Hongyin Jia. "CFD-based structure optimization of plate bundle in plate-fin heat exchanger considering flow and heat transfer performance." International Journal of Chemical Reactor Engineering 19, no. 5 (April 12, 2021): 499–513. http://dx.doi.org/10.1515/ijcre-2020-0219.

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Abstract The plate-fin heat exchanger has been widely applied in the field of air separation and aerospace due to its high specific surface area of heat transfer. However, the low heat transfer efficiency of its plate bundles has also attracted more attention. It is of great significance to optimize the structure of plate-fin heat exchanger to improve its heat transfer efficiency. The plate bundle was studied by combining numerical simulation with experiment. Firstly, according to the heat and mass transfer theory, the plate bundle calculation model of plate-fin heat exchanger was established, and the accuracy of the UDF (User-Defined Functions) for describing the mass and heat transfer was verified. Then, the influences of fin structure parameters on the heat and mass transfer characteristics of channel were discussed, including the height, spacing, thickness and length of fins. Finally the influence of various factors on the flow field performance under different flow states was integrated to complete the optimal design of the plate bundle.

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Zhang, Min, Li Jun Wang, and Chun Fei Guo. "Numerical Simulation on Low-Speed Magnetic Flux Leakage Inspection to Heat Exchanger Pipes." Advanced Materials Research 314-316 (August 2011): 355–58. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.355.

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Numerical simulation on low-speed magnetic flux leakage inspection to heat exchanger pipes is described. Statistics suggest that 90% of defects in ferromagnetic heat exchanger pipes occur under the retaining plate or nearby, making it a key monitoring area. This paper illustrates influence of different velocities, defect depth and position on the characteristic of flux leakage signals. Result of the numerical simulation provides theoretical principle for application of Magnetic flux leakage (MFL) technique to inspection of heat exchanger pipes. It possesses great significance to enhance the possibility for defect inspection as well.

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Lai, Hui. "Numerical Study of Flow and Heat Transfer of Heat Exchanger with Louver Baffles." Applied Mechanics and Materials 721 (December 2014): 174–77. http://dx.doi.org/10.4028/www.scientific.net/amm.721.174.

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This paper presents a heat exchanger of louver baffle, the establishment of a three-dimensional model, research by numerical simulation of flow and heat transfer performance of the heat exchanger baffles different louver angle, and analyzes its local temperature, and evaluated for its overall performance. The results show that louver baffle heat exchanger avoids the existence of traditional segmental baffle heat exchanger problem after baffle local flow dead zone; compared with conventional segmental baffle heat exchanger, louver baffle heat exchanger greatly reduces the heat exchanger shell side pressure drop; louver baffle heat exchanger in the unit pressure drop coefficients are higher than the segmental baffle heat exchanger, and with the baffle plate angle increases, with significant energy savings.

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Ke, Hanbing, Yuansheng Lin, Zhiwu Ke, Qi Xiao, Zhiguo Wei, Kai Chen, and Huijin Xu. "Analysis Exploring the Uniformity of Flow Distribution in Multi-Channels for the Application of Printed Circuit Heat Exchangers." Symmetry 12, no. 2 (February 22, 2020): 314. http://dx.doi.org/10.3390/sym12020314.

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The maldistribution of fluid flow through multi-channels is a critical issue encountered in many areas, such as multi-channel heat exchangers, electronic device cooling, refrigeration and cryogenic devices, air separation and the petrochemical industry. In this paper, the uniformity of flow distribution in a printed circuit heat exchanger (PCHE) is investigated. The flow distribution and resistance characteristics of a PCHE plate are studied with numerical models under different flow distribution cases. The results show that the sudden change in the angle of the fluid at the inlet of the channel can be greatly reduced by using a spreader plate with an equal inner and outer radius. The flow separation of the fluid at the inlet of the channel can also be weakened and the imbalance of flow distribution in the channel can be reduced. Therefore, the flow uniformity can be improved and the pressure loss between the inlet and outlet of PCHEs can be reduced. The flow maldistribution in each PCHE channel can be reduced to ± 0.2%, and the average flow maldistribution in all PCHE channels can be reduced to less than 5% when the number of manifolds reaches nine. The numerical simulation of fluid flow distribution can provide guidance for the subsequent research and the design and development of multi-channel heat exchangers. In summary, the symmetry of the fluid flow in multi-channels for PCHE was analyzed in this work. This work presents the frequently encountered problem of maldistribution of fluid flow in engineering, and the performance promotion leads to symmetrical aspects in both the structure and the physical process.

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Dong, Jin Hua, and Shun Fang Liu. "Numerical Simulation of Fractal Tree-Shaped Flow Field Structures in PEMFC." Applied Mechanics and Materials 151 (January 2012): 32–35. http://dx.doi.org/10.4028/www.scientific.net/amm.151.32.

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The fractal tree-shaped structure such as tree, plant root, leaves, animal lung and so on is universal and unique in nature. These structures possess the symmetric micro-channel distributions and the efficient transport characteristics. They are considered to be an optimal network channel of mass transfer and heat transfer. The mass transfer and heat transfer feature of bipolar plate in proton exchange membrane fuel cell (PEMFC) is similar with animal lungs and leaves. In this paper, fractal theory is used to study tree-shaped flow field structure of bipolar plate in PEMFC. It is demonstrated by numerical simulation that fractal tree-shaped flow field structure can provide substantially flow-field distribution, current density and heat transfer compared to the traditional flow field structure.

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Afonso, Isabel M., Paulo Cruz, João M. Maia, and Luís F. Melo. "Simplified numerical simulation to obtain heat transfer correlations for stirred yoghurt in a plate heat exchanger." Food and Bioproducts Processing 86, no. 4 (December 2008): 296–303. http://dx.doi.org/10.1016/j.fbp.2008.01.004.

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Deng, Xiaochuan, Fengchang Sun, Zhonghua Bai, Zongze Yu, Jiahua Wu, Dongyang Yu, and zheng Wang. "Flow field optimizing study of low temperature economizer in a coal-fired boiler." E3S Web of Conferences 261 (2021): 01040. http://dx.doi.org/10.1051/e3sconf/202126101040.

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The complex structure of double inlet gas flue has a significant influence on gas flow field distribution in a 1000MW coal-fired boiler’s low temperature economizer. In order to optimize gas flow field of the low temperature economizer with double inlet gas flues and reduce its failure rate, this paper presents a flow field simulation of the low temperature economizer based on the computational fluid dynamics (CFD). This numerical simulation was operated by using porous media model instead of the complex structure inside heat exchanger and the standard k-epsilon model. Velocity contours of a same vertical cross-section inside of inlet gas flue of the heat exchange zone in different numerical simulations were evaluated by the evaluation standard of RSM. The results of numerical simulation show that the main reasons for uneven distribution of flow field in economizer and its inlet gas flues are unequal diameter of flue elbow and straight flue, unreasonable setting of guide plate and diffusion flue elbow. After making structural optimization of the low temperature economizer such as equalizing elbow to the straight flue diameter and setting the guide plate reasonably, the flow field in the low temperature economizer and its flues are obviously improved.

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Basok, B., M. Novitska, and S. Goncharuk. "Numerical simulation and study of thermal characteristics of a lightweight floor heating system." Ventilation, Illumination and Heat Gas Supply 35 (December 27, 2020): 15–20. http://dx.doi.org/10.32347/2409-2606.2020.35.15-20.

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The use of underfloor heating systems is an effective way to achieve thermal comfort for users in energy-efficient buildings. There are two kinds of such systems: traditional and dry-assembled. The first type is researched more deeply than the second one. The paper presents theoretical studies of the thermotechnical parameters of a water underfloor dry-assembled heating system. The design of the underfloor dry-assembled heating system, considered in the work, consists of a heat insulation (expanded polystyrene), on which the pipes of the heating system are located, in contact with an aluminum heat distribution plate. The system is covered with floor finishing. The calculation for a stationary operating mode of the floor heating system was carried out on the basis of a system of equations for momentum and energy. The model was validated using the results of experimental studies. The calculation results cause some overestimation of the experimental data, possibly, beecause of deviations in thermotechnical characteristics of materials. But the simulation model correctly estimates the behaviour of the system at change of its parameters. The paper concludes that this configuration of the underfloor heating system can be used in heating systems for residential and non-residential premises. The aluminum heat distribution plate significantly affects the heat transfer processes in the system. Due to the plate, the heat flux is made uniform in the plane of the floor surface, which has a positive effect on heat distribution and reduces thermal tension in the finish coating. The use of ceramic tiles increases the overall heat exchange efficiency of the system with the room air. An increase in the thickness of the expanded polystyrene board increases the value of the heat flux from the surface of the heated floor. An increase in the flow rate and temperature of the heat carrier also cause an increase in the density of heat flux from the floor surface.

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Nikolaenko, Yu E., О. V. Baranyuk, and S. A. Reva. "Thermal characteristics of the liquid heat exchanger for the transmitter/reciever module of AРAA." Технология и конструирование в электронной аппаратуре, no. 1-2 (2020): 37–44. http://dx.doi.org/10.15222/tkea2020.1-2.37.

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The paper presents the results on numerical simulation of the temperature field of a cold plate type liquid heat exchanger for a multichannel transmitter/receiver module. Each side of the cold plate carries 8 local microwave fuel elements with a heat dissipation capacity of 11 W each and one block with low-power electronic elements (total power of all elements — 50 W), installed symmetrically on both sides. The total heat dissipation capacity is 276 W. The cold plate is cooled by pumping a liquid heat carrier (Antifreeze A 65) through a curved cooling channel of rectangular cross-section made inside the liquid heat exchanger. The study was conducted at a working fluid flow rate of 2, 4, 6, 8 and 10 l/min. Numerical simulation allowed obtaining the temperature distribution of the mounting surfaces of the cold plate and determining the values of the working fluid flow rate, which provide effective cooling of the mounting surfaces. It is shown that at a flow rate of 4 l/min, the temperature values at the installation sites of local microwave elements do not exceed 64°C. The total thermal resistance of the cooling system based on a liquid heat exchanger is from 0.063 to 0.028°C/W with a flow rate from 2 to 10 l/min, respectively.

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Pham, M. V., F. Plourde, and S. K. Doan. "Large-Eddy Simulations of Staggered Parallel-Plate Fin Heat Exchangers: Effect of Reynolds Number on Flow Topology." Numerical Heat Transfer, Part A: Applications 53, no. 4 (November 26, 2008): 354–76. http://dx.doi.org/10.1080/10407780701634201.

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Murer, Y., and P. Millan. "Two-Dimensional Modeling of Heat Transfer Through Sandwich Plates With Inhomogeneous Boundary Conditions on the Faces." Journal of Heat Transfer 120, no. 3 (August 1, 1998): 606–16. http://dx.doi.org/10.1115/1.2824318.

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This paper presents a thermal model describing heat transfer in multispan sandwich rectangular plates. The model is time-dependent and two-dimensional. Complex thermal phenomena occurring in light cores (honeycomb) and thermal contact resistance are taken into account in the model. Particular attention is paid to the boundary conditions on the faces of the plate: radiative and nonuniform convective exchange are taken into account. The global temperature solution for stationary cases is developed on trigonometric and exponential functions bases. The properties of the Laplace transform are used to solve time-dependent cases. Validation experiments are carried out in a wind tunnel ring for two-span plates submitted to convective exchanges on one face; the same configuration is reproduced for an aluminum sandwich plate in an industrial set-up bench. Experimental results agree well with the numerical simulation.

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Journal articles on the topic 'Numerical simulation of plate heat exchangers'

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