Journal articles: 'Plate-Fin heat exchanger'

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Singh, Nitesh Kumar, and N. V. Saxena. "Study on Thermal Behavior of Flat Plate Heat Exchanger." SMART MOVES JOURNAL IJOSCIENCE 6, no. 7 (July 24, 2020): 3235. http://dx.doi.org/10.24113/ijoscience.v6i7.315.

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The plate Fin-and-tube heat exchangers are one of the most common types of heat exchangers used in various industrial applications such as heating, cooling, air conditioning, power plants, chemical plants, petrochemical plants, oil refineries, natural gas processing, industry aerospace, and wastewater treatment. It is very important to reduce the size and weight and improve the heat transfer rate of the heat exchanger. Finned and tubular heat exchangers with different geometries and orientations are used to improve thermal performance. This paper presents the Plate fin heat exchanger and types of Plate Fin Heat Exchanger Surfaces.

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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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Hajabdollahi, Hassan. "Comparison of stationary and rotary matrix heat exchangers using teaching-learning-based optimization algorithm." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 232, no. 4 (July 7, 2017): 493–502. http://dx.doi.org/10.1177/0954408917719769.

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In this paper, two kinds of compact heat exchanger including plate fin heat exchanger and rotary regenerator, respectively the stationary and rotary matrix heat exchanger, are compared. For this purpose, both heat exchangers are optimized by considering three simultaneous objective functions including effectiveness, heat exchanger volume, and total pressure drop using multi-objective teaching learning based optimization algorithm. Six different design parameters are considered for the both plate fin heat exchanger and rotary regenerator. Optimization is performed for the same and different hot and cold side mass flow rates. The optimum results reveal 13.26% growth in the effectiveness, 475.17% increase in the volume, and 95.45% reduction in the pressure drop in RR as compared with plate fin heat exchanger and for the final optimum point. As a result, rotary regenerator is more suitable in the case of high effectiveness and low pressure drop while plate fin heat exchanger is more suitable in the case of space limitation (lower heat exchanger volume).

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Gupta, Ajay K., Manoj Kumar, Ranjit K. Sahoo, and Sunil K. Sarangi. "Analytical and Experimental Investigation of a Plate Fin Heat Exchanger at Cryogenics Temperature." International Journal of Heat and Technology 39, no. 4 (August 31, 2021): 1225–35. http://dx.doi.org/10.18280/ijht.390420.

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Plate-fin heat exchangers provide a broad range of applications in many cryogenic industries for liquefaction and separation of gasses because of their excellent technical advantages such as high effectiveness, compact size, etc. Correlations are available for the design of a plate-fin heat exchanger, but experimental investigations are few at cryogenic temperature. In the present study, a cryogenic heat exchanger test setup has been designed and fabricated to investigate the performance of plate-fin heat exchanger at cryogenic temperature. Major parameters (Colburn factor, Friction factor, etc.) that affect the performance of plate-fin heat exchangers are provided concisely. The effect of mass flow rate and inlet temperature on the effectiveness and pressure drop of the heat exchanger are investigated. It is observed that with an increase in mass flow rate effectiveness and pressure drop increases. The present setup emphasis the systematic procedure to perform the experiment based on cryogenic operating conditions and represent its uncertainties level.

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Kim, S. Y., J. W. Paek, and B. H. Kang. "Flow and Heat Transfer Correlations for Porous Fin in a Plate-Fin Heat Exchanger." Journal of Heat Transfer 122, no. 3 (March 10, 2000): 572–78. http://dx.doi.org/10.1115/1.1287170.

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The present experimental study investigates the impact of porous fins on the pressure drop and heat transfer characteristics in plate-fin heat exchangers. Systematic experiments have been carried out in a simplified model of a plate-porous fin heat exchanger at a controlled test environment. The porous fins are made of 6101 aluminum-alloy foam materials with different permeabilities and porosities. Comparison of performance between the porous fins and the conventional louvered fins has been made. The experimental results indicate that friction and heat transfer rate are significantly affected by permeability as well as porosity of the porous fin. The porous fins used in the present study show similar thermal performance to the conventional louvered fin. However, the louvered fin shows a little better performance in terms of pressure drop. For compactness of the heat exchanger, the porous fins with high pore density and low porosity are preferable. Useful correlations for the friction factor and the modified j-factor are also given for the design of a plate-porous fin heat exchanger. [S0022-1481(00)01103-8]

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Verma, Ajai Kumar. "Analysis of Performance of Plate Fin Heat Exchanger." International Journal for Research in Applied Science and Engineering Technology 9, no. VIII (August 10, 2021): 211–14. http://dx.doi.org/10.22214/ijraset.2021.37298.

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Plate fin heat exchanger is a kind of smaller heat exchange device which has applications in cars, low temperatures, rockets space vehicles etc. The plate fin heat exchanger devices are mostly utilized for liquefaction of nitrogen. So that they are highly efficient because no liquid oxygen will be produced if the efficiency of the system is below the required value, and that is nearly 87%. That’s ‘why it is very necessary to check their efficiency before bringing them in actual application. This efficiency has been calculated here. The required heat exchanger has different shape and its effectiveness is tested experimentally in the heat and mass transfer lab. Experiment is carried out by putting the Quantity of hot and cold fluid same, but the result is obtained by taking different quantity of fluid for different experiment. It means that for one test quantity of both the fluid is taken same and this test is repeated for different quantity. So, in this way productiveness of the required exchanger is determined for different quantity.

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Chen, Jie, Weihua Cai, Shulei Li, Yan Ren, Hongqiang Ma, and Yiqiang Jiang. "Numerical investigation on saturated boiling flow and heat transfer of mixture refrigerant in a vertical rectangular mini-channel." Thermal Science 22, Suppl. 2 (2018): 617–27. http://dx.doi.org/10.2298/tsci171026046c.

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Plate-fin heat exchanger with rectangular minichannels, as a type of high-perfor- mance compact heat exchangers, has been widely used in liquefied natural gas field. However, the studies on saturated boiling flow and heat transfer for mixture refrigerant in plate-fin heat exchanger have been scarcely explored, which are helpful for designing more effective plate-fin heat exchanger using in liquefied natural gas field. Therefore, in this paper, the characteristics of saturated boiling flow and heat transfer for mixture refrigerant in rectangular minichannels of plate-fin heat exchanger were studied numerally based on validated model. Then, the effect of different parameters (vapor quality, mass flux, and heat flux) on heat transfer coefficient and frictional pressure drop were discussed. The results indicated that the boiling heat transfer coefficient and pressure drop are mainly influenced by quality and mass flux while heat flux has little influence on them. This is due to the fact that the main boiling mechanisms were forced convective boiling and the evaporation of dispersed liquid phase while nucleate boiling is slight.

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Ramezanpour Jirandeh, Reza, Mehrangiz Ghazi, Amir Farhang Sotoodeh, and Mohammad Nikian. "Plate-fin heat exchanger network modeling, design and optimization – a novel and comprehensive algorithm." Journal of Engineering, Design and Technology 19, no. 5 (January 11, 2021): 1017–43. http://dx.doi.org/10.1108/jedt-07-2020-0262.

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Purpose The purpose of this paper is to present a novel and applied method for optimum designing of plate-finned heat exchanger network. Considering the total annual cost as the objective function, a network of plate-finned heat exchanger is designed and optimized. Design/methodology/approach Accurate evaluation of plate-finned heat exchanger networks depends on different fin types with 10 different geometrical parameters of heat exchangers. In this study, fin numbers are considered as the main decision variables and geometrical parameters of fins are considered as the secondary decision variables. The algorithm applies heat transfer and pressure drop coefficients correction method and differential evolution (DE) algorithm to obtain the optimum results. In this paper, optimization and minimization of the total annual cost of heat exchanger network is considered as the objective function. Findings In this study, a novel and applied method for optimum designing of plate-finned heat exchanger network is presented. The comprehensive algorithm is applied into a case study and the results are obtained for both counter-flow and cross-flow plate-finned heat exchangers. The total annual cost and total area of the network with counter-flow heat exchangers were 12.5% and 23.27%, respectively, smaller than the corresponding values of the network with cross-flow heat exchanger. Originality/value In this paper, a reliable method is used to design, optimize parameters and the economic optimization of heat exchanger network. Taking into account the importance of plate-finned heat exchangers in industrial applications and the complexity in their geometry, the DE methodology is adopted to obtain an optimal geometric configuration. The total annual cost is chosen as the objective function. Applying this technique to a case study illustrates its capability to accurate design plate-finned heat exchangers to improve the objective function of the heat exchanger network from the economic viewpoint with the design of details.

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Ghosh, I., S. K. Sarangi, and P. K. Das. "Simulation Algorithm for Multistream Plate Fin Heat Exchangers Including Axial Conduction, Heat Leakage, and Variable Fluid Property." Journal of Heat Transfer 129, no. 7 (December 27, 2006): 884–93. http://dx.doi.org/10.1115/1.2717938.

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The effect of axial conduction through heat exchanger matrix, heat exchange with the surroundings, and variable fluid properties are included in the simulation algorithm of multistream plate fin heat exchangers. The procedure involves partitioning of the exchanger in both axial and normal directions, writing conservation equations for each segment, and solving them using an iterative procedure. In the normal direction, the exchanger is divided into a stack of overlapping two-stream exchangers interacting through their common streams. In the axial direction, the exchanger is successively partitioned to 2k segments, the final value of k being determined by the point where further partitioning has only marginal effect. The effects of axial conduction, heat leakage, and variable fluid properties are illustrated with the help of multistream heat exchanger examples solved by the above-mentioned technique.

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Alam, Mahtab, and Dr Dharmendra Singh Rajput. "Optimization Performance on Plate Fin Tube Heat Exchanger." SMART MOVES JOURNAL IJOSCIENCE 5, no. 3 (March 28, 2019): 10. http://dx.doi.org/10.24113/ijoscience.v5i3.197.

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The main objective of the present work is to investigation of optimum design of plate fin tube heat exchanger using Computational fluid dynamic approach and maximizing thermal performance. There are total five designs of plate fin and tube heat exchanger are used in present work and CFD analysis have been performed in it to get maximum heat transfer. It has been observed from CFD analysis that the maximum heat transfer can be achieved from plate fin and tube heat exchanger with elliptical tube arrangement inclined at 30o with 23.22% more heat transfer capacity as compared to circular tube plate pin heat exchanger. So that it is recommended that if the plate fins and tube heat exchanger with inclined elliptical tube used in place of circular tube arrangement, batter heat transfer can be achieved.

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sh, A. Ani, B. Anush Raj, and T. Rajesh Thirumalai. "A Review on Plate Fin Heat Exchanger." International Journal of Mechanical Engineering 4, no. 3 (April 25, 2017): 54–68. http://dx.doi.org/10.14445/23488360/ijme-v4i4p110.

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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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13

Taler, Dawid. "Experimental determination of correlations for mean heat transfer coefficients in plate fin and tube heat exchangers." Archives of Thermodynamics 33, no. 3 (September 1, 2012): 1–24. http://dx.doi.org/10.2478/v10173-012-0014-z.

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Abstract This paper presents a numerical method for determining heat transfer coefficients in cross-flow heat exchangers with extended heat exchange surfaces. Coefficients in the correlations defining heat transfer on the liquid- and air-side were determined using a nonlinear regression method. Correlation coefficients were determined from the condition that the sum of squared liquid and air temperature differences at the heat exchanger outlet, obtained by measurements and those calculated, achieved minimum. Minimum of the sum of the squares was found using the Levenberg-Marquardt method. The uncertainty in estimated parameters was determined using the error propagation rule by Gauss. The outlet temperature of the liquid and air leaving the heat exchanger was calculated using the analytical model of the heat exchanger.

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El'chinov, V. P., V. A. Kirpikov, and A. I. Smorodin. "Plate-fin heat exchanger with reduced axial heat conduction." Chemical and Petroleum Engineering 21, no. 8 (August 1985): 398–401. http://dx.doi.org/10.1007/bf01149711.

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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 carried out earlier for single-phase steady-state heat transfer and pressure drop analysis on CHE passages and fins. An analysis of a cross-flow plate-fin compact heat exchanger, accounting for the individual effects of two-dimensional longitudinal heat conduction through the exchanger wall, inlet fluid flow maldistribution and inlet temperature non-uniformity are carried out using a Finite Element Method (FEM). Findings The performance deterioration of high-efficiency cross-flow plate-fin compact heat exchangers have been reviewed with the combined effects of wall longitudinal heat conduction and inlet fluid flow/temperature non-uniformity using a dedicated FEM analysis. It is found that the performance deterioration is quite significant in some typical applications due to the effects of wall longitudinal heat conduction and inlet fluid flow non-uniformity on cross-flow plate-fin heat exchangers. A Computational Fluid Dynamics (CFD) program FLUENT has been used to predict the design data in terms of “j” and “f” factors for plate-fin heat exchanger fins. The suitable design data are generated using CFD analysis covering the laminar, transition and turbulent flow regimes for various types of fins. Originality/value The correlations for the friction factor “f” and Colburn factor “j” have been found to be good. The correlations can be used by the heat exchanger designers and can reduce the number of tests and modification of the prototype to a minimum for similar applications and types of fins.

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Taler, Dawid, and Adam Sury. "Inverse heat transfer problem in digital temperature control in plate fin and tube heat exchangers." Archives of Thermodynamics 32, no. 4 (December 1, 2011): 17–32. http://dx.doi.org/10.2478/v10173-011-0029-x.

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Inverse heat transfer problem in digital temperature control in plate fin and tube heat exchangersThe aim of the paper is a steady-state inverse heat transfer problem for plate-fin and tube heat exchangers. The objective of the process control is to adjust the number of fan revolutions per minute so that the water temperature at the heat exchanger outlet is equal to a preset value. Two control techniques were developed. The first is based on the presented mathematical model of the heat exchanger while the second is a digital proportional-integral-derivative (PID) control. The first procedure is very stable. The digital PID controller becomes unstable if the water volumetric flow rate changes significantly. The developed techniques were implemented in digital control system of the water exit temperature in a plate fin and tube heat exchanger. The measured exit temperature of the water was very close to the set value of the temperature if the first method was used. The experiments showed that the PID controller works also well but becomes frequently unstable.

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Junqi, Dong, Zhang Yi, Li Gengtian, and Xu Weiwu. "Experimental Study of Wavy Fin Aluminum Plate Fin Heat Exchanger." Experimental Heat Transfer 26, no. 4 (August 8, 2013): 384–96. http://dx.doi.org/10.1080/08916152.2012.694010.

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Sundén, Lieke Wang, Bengt. "Design Methodology for Multistream Plate-Fin Heat Exchangers in Heat Exchanger Networks." Heat Transfer Engineering 22, no. 6 (November 2001): 3–11. http://dx.doi.org/10.1080/014576301317048398.

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Ma’arof, M. I. N., Girma T. Chala, Hazran Husain, and Muhammad S. S. Mohamed. "Influence of fins designs, geometries and conditions on the performance of a plate-fin heat exchanger-experimental perspective." Journal of Mechanical Engineering and Sciences 13, no. 1 (March 29, 2019): 4368–79. http://dx.doi.org/10.15282/jmes.13.1.2019.02.0372.

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A fin heat exchanger is a simple form of cooling device that is built for efficient heat transfer from one medium to another. Generally, it involves medium such as fluid to perform heat exchange via convective heat transfer. This study is aimed at investigating the effects of diverse designs (arrangements of the fins), qualities (the total surface area of the fin for heat exchange) and conditions (the surface characteristics) of fin heat exchanger on the degree of heat transfer from the experimental perspective. The fin heat exchanger was fabricated and tested. It was observed that by varying the arrangement and condition of the fins, the rate of heat transfer could be affected. However, varying the quality of the fin didn’t have much impact. Nevertheless, the quality aspect of the fin heat exchanger could play a significant role for heat exchanger of larger in scale and dimension. The coating, that is the condition of the fins, aided in decreasing the temperature at a much higher margin at all fan speeds.

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MATSUI, Singo, Yasushi MUTO, and Yasuaki SHIINA. "Stress Analysis of Plate-fin Type Heat Exchanger." Transactions of the Atomic Energy Society of Japan 2, no. 2 (2003): 175–86. http://dx.doi.org/10.3327/taesj2002.2.175.

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INOMATA, Takashi, Shigeru AOKI, and Kenji AMAYA. "Thermal-Stress Analysis of Plate-Fin Heat Exchanger." Proceedings of The Computational Mechanics Conference 2002.15 (2002): 487–88. http://dx.doi.org/10.1299/jsmecmd.2002.15.487.

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Van den Bulck, E. "Optimal Design of Crossflow Heat Exchangers." Journal of Heat Transfer 113, no. 2 (May 1, 1991): 341–47. http://dx.doi.org/10.1115/1.2910567.

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The design of plate-fin and tube-fin crossflow heat exchangers is discussed. The transfer surface area of crossflow heat exchangers is used ineffectively because of the nonuniform distribution of the heat transfer across the volume of the exchanger. The optimal distribution of the transfer surface area for maximum heat exchanger effectiveness and constant total surface area is determined. It is found that a Dirac delta distribution of the transfer surface aligned along the diagonal of the crossflow exchanger gives the best performance; equal to that of a counterflow device. Design guidelines for optimal area allocation within crossflow heat exchangers are established. Compared to conventional designs, designs following these guidelines may lead to either a higher exchanger effectiveness for equal pressure drops and surface area, reduced pressure drops for equal exchanger effectiveness, or reduced weight and a near cubic form of the exchanger core for equal pressure drops and effectiveness.

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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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Ma, Hongqiang, Binxian He, Shichao Lan, Yemin Liu, Xing Gao, Xiankai Xue, Caiqin Hou, and Chune Li. "The stress characteristics of plate-fin structures at the different operation parameters of LNG heat exchanger." Oil & Gas Sciences and Technology – Revue d’IFP Energies nouvelles 73 (2018): 13. http://dx.doi.org/10.2516/ogst/2018009.

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In this paper, the stresses of plate-fin structures at the different operation parameters were analyzed in actual operation process of LNG plate-fin heat exchanger based on finite element method and thermal elastic theory. Stress characteristics of plate-fin structures were investigated at the different operation parameters of that. The results show that the structural failure of plate-fin structures is mainly induced by the maximum shear stress at the brazing filler metal layer between plate and fin while by the maximum normal stress in the region of brazed joint near the fin side. And a crack would initiate in brazed joint near the fin side. The maximum normal stress is also main factor to result in the structural failure of plate-fin structures at the different temperature difference (between Natural Gas (NG) and Mixture Refrigerant (MR)), MR temperature and NG pressure of LNG heat exchanger. At the same time, the peak stresses obviously increase as the temperature difference, MR temperature and NG pressure increase. These results will provide some constructive instructions in the safe operation of LNG plate-fin heat exchanger in a large-scale LNG cold-box.

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Xue, Yuan, Zhihua Ge, Xiaoze Du, and Lijun Yang. "On the Heat Transfer Enhancement of Plate Fin Heat Exchanger." Energies 11, no. 6 (May 30, 2018): 1398. http://dx.doi.org/10.3390/en11061398.

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Gupta, A. K., P. Kumar, R. K. Sahoo, A. K. Sahu, and S. K. Sarangi. "Performance measurement of plate fin heat exchanger by exploration: ANN, ANFIS, GA, and SA." Journal of Computational Design and Engineering 4, no. 1 (July 14, 2016): 60–68. http://dx.doi.org/10.1016/j.jcde.2016.07.002.

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Abstract An experimental work is conducted on counter flow plate fin compact heat exchanger using offset strip fin under different mass flow rates. The training, testing, and validation set of data has been collected by conducting experiments. Next, artificial neural network merged with Genetic Algorithm (GA) utilized to measure the performance of plate-fin compact heat exchanger. The main aim of present research is to measure the performance of plate-fin compact heat exchanger and to provide full explanations. An artificial neural network predicted simulated data, which verified with experimental data under 10–20% error. Then, the authors examined two well-known global search techniques, simulated annealing and the genetic algorithm. The proposed genetic algorithm and Simulated Annealing (SA) results have been summarized. The parameters are impartially important for good results. With the emergence of a new data-driven modeling technique, Neuro-fuzzy based systems are established in academic and practical applications. The neuro-fuzzy interference system (ANFIS) has also been examined to undertake the problem related to plate-fin heat exchanger performance measurement under various parameters. Moreover, Parallel with ANFIS model and Artificial Neural Network (ANN) model has been created with emphasizing the accuracy of the different techniques. A wide range of statistical indicators used to assess the performance of the models. Based on the comparison, it was revealed that technical ANFIS improve the accuracy of estimates in the small pool and tropical ANN. Highlights Performance of compact plate fin heat exchanger has been measured. Predicted data given by ANN has been verified by simulation data and the experimental data. Depicted the applications of optimization methods upon fin heat exchanger.

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Prasad, B. S. V., and S. M. K. A. Gurukul. "Differential Methods for the Performance Prediction of Multistream Plate-Fin Heat Exchangers." Journal of Heat Transfer 114, no. 1 (February 1, 1992): 41–49. http://dx.doi.org/10.1115/1.2911265.

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Use of traditional methods of rating can prove inaccurate or inadequate for many plate-fin heat exchanger applications. The superiority in practical situations of differential methods, based on dividing the heat exchanger into several sections and a step-wise integration of the heat transfer and pressure loss functions, is discussed. Differential methods are developed for counterflow, crossflow, and cross-counter-flow heat exchangers. The methods developed also avoid iterations at the section level calculations. Design of computer algorithms based on these methods is outlined. Two computer programs developed using the methods are presented and the results for a few typical cases are discussed.

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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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Juneidi, Nuha, Rania Asha, Firas Jarrar, and Fahrettin Ozturk. "Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger." Journal of Materials Science Research 5, no. 2 (March 10, 2016): 115. http://dx.doi.org/10.5539/jmsr.v5n2p115.

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<p class="1Body">Compact, lightweight, strong, and corrosion-resistant heat exchangers are required for many applications. In heat exchangers, plate-fin exchangers design with corrugated fins of triangular cross-sections provide high heat transfer surface area to volume ratio. This study focuses on the design for manufacturing of an aluminum AA5083 alloy plate-fin heat exchanger. The superplastic forming method is considered for the fabrication of the heat exchanger. A two-dimensional plane strain finite element model is used to study the effect of the triangular fins’ aspect ratio on the thickness distribution and the required gas forming pressure cycles. The simulation results show that the thinning in deep channels can be improved by increasing the coefficient of friction but only up to a certain limit. In addition, increasing the coefficient of friction reduces the required applied pressure on the sheet and increases the forming time. The present effort represents a necessary step toward the design of sophisticated corrugated triangular fin surfaces considering both performance and manufacturability.</p>

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Juneidi, Nuha, Rania Asha, Firas Jarrar, and Fahrettin Ozturk. "Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger." Journal of Materials Science Research 5, no. 2 (March 10, 2016): 121. http://dx.doi.org/10.5539/jmsr.v5n2p121.

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<p class="1Body">Compact, lightweight, strong, and corrosion-resistant heat exchangers are required for many applications. In heat exchangers, plate-fin exchangers design with corrugated fins of triangular cross-sections provide high heat transfer surface area to volume ratio. This study focuses on the design for manufacturing of an aluminum AA5083 alloy plate-fin heat exchanger. The superplastic forming method is considered for the fabrication of the heat exchanger. A two-dimensional plane strain finite element model is used to study the effect of the triangular fins’ aspect ratio on the thickness distribution and the required gas forming pressure cycles. The simulation results show that the thinning in deep channels can be improved by increasing the coefficient of friction but only up to a certain limit. In addition, increasing the coefficient of friction reduces the required applied pressure on the sheet and increases the forming time. The present effort represents a necessary step toward the design of sophisticated corrugated triangular fin surfaces considering both performance and manufacturability.</p>

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Fuchs, M., D. Heinrich, X. Luo, and S. Kabelac. "Thermal performance measurement of additive manufactured high-temperature compact heat exchangers." Journal of Physics: Conference Series 2116, no. 1 (November 1, 2021): 012095. http://dx.doi.org/10.1088/1742-6596/2116/1/012095.

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Abstract Due to increased distribution of high-temperature processes in energy and process plants, more efficient and compact high-temperature heat exchangers are being developed. The additive manufacturing allows the construction of compact sizes and application-specific requirements. To evaluate the thermal performance of these heat exchangers, experimental investigations are evident. This study presents a test rig for testing compact high-temperature heat exchangers as well as a first set of thermal performance data of an additively manufactured plate-fin heat exchanger. The test rig can provide a maximum fluid temperature of 900°C and a maximum mass flow rate of 0.8 kg/min. A steam unit can add steam to the fluid stream to evaluate the influence of gas radiation on the thermal performance. The capabilities of this test rig are being tested with the plate-fin heat exchanger, varying the mass flow rate between 0.2 - 0.52 kg/min at a hot and cold inlet temperature of 750°C and 250°C. The overall effectiveness of the heat exchanger is approx. 0.9.

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Saggu, Mustansar Hayat, Nadeem Ahmed Sheikh, Usama Muhammad Niazi, Muhammad Irfan, and Adam Glowacz. "Predicting the Structural Reliability of LNG Processing Plate-Fin Heat Exchanger for Energy Conservation." Energies 13, no. 9 (May 1, 2020): 2175. http://dx.doi.org/10.3390/en13092175.

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Liquefied natural gas (LNG) is one of the hydrocarbon fuels with the least carbon footprint having a rapidly rising global share in the prime energy market. LNG processing for transportation at longer distances works under cryogenic conditions, especially when used for liquefaction and gasification applications. The supply chain of the eco-environmental friendly hydrocarbon is heavily dependent on the processing plant used for liquefaction and subsequent re-gasification of the natural gas. Plate-fin heat exchangers are extensively used in the LNG industry for both re-gasification as well as liquefaction processes. The exchange of heat during the process of natural gas phase change involves plate-fin heat exchangers working under cryogenic low-temperature conditions. The heat exchangers are designed to have brazed joints that are most vulnerable to failure under these temperature conditions. One failure of such a joint can not only hinder the supply chain but also may result in fire and life hazards. In almost all earlier studies, analytical and numerical methods were used to analyze these braze joints using finite element method methods and examining the stresses while keeping them at or near to ambient conditions. In this research, the plate-fin heat exchanger is investigated for its structural stability of brazed fins for three different fin configurations: plain, wavy and compound having different joint geometries. In addition, the analyses are carried out using experimentally measured brazed joint strength which is measured to be on average 22% lower than the base material strength owing to brazing process and resultant heat-affected zone (HAZ). Therefore, the reliability is assessed for these joints in terms of factor of safety (FOS) while keeping in view the actual yield criteria. It was found that the structural stability of compound fins configuration is weakest amongst all considered fin configurations. The failure of the compound fin brazed joint is expected to be along the horizontal path of the joint due to yielding. The study also predicts the life of the fin brazed joints in different joining directions with different topologies of fins commonly recommended in the literature. It is observed that the commonly recommended safe fin geometries are predicted to be susceptible to failure if a reduction in the brazed joint is considered. The analysis and recommendation in this paper shall provide a reliable and safe design approach for plate-fin exchangers for different operating conditions especially in low to cryogenic temperature applications.

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Wang, Sheng, and Shudong Wang. "Distribution optimization for plate-fin catalytic combustion heat exchanger." Chemical Engineering Journal 131, no. 1-3 (July 2007): 171–79. http://dx.doi.org/10.1016/j.cej.2006.12.035.

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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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Hollmann, Jan, Marco Fuchs, Carsten Spieker, Ulrich Gardemann, Michael Steffen, Xing Luo, and Stephan Kabelac. "System Simulation and Analysis of an LNG-Fueled SOFC System Using Additively Manufactured High Temperature Heat Exchangers." Energies 15, no. 3 (January 27, 2022): 941. http://dx.doi.org/10.3390/en15030941.

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A laboratory-scale solid oxide fuel cell (SOFC) system using liquefied natural gas (LNG) as a fuel is designed to be used as an energy converter on seagoing vessels (MultiSchIBZ project). The presented system design phase is supported by thermodynamic system simulation. As heat integration plays a crucial role with regard to fuel recirculation and endothermic pre-reforming, the heat exchanger and pre-reforming component models need to exhibit a high degree of accuracy throughout the entire operating range. Compact additively manufactured tube-bundle and plate-fin heat exchangers are designed to achieve high heat exchange efficiencies at low pressure losses. Their heat transfer correlations are derived from experimental component tests under operating conditions. A simulation study utilizing these heat exchanger characteristics is carried out for four configuration variants of pre-reforming and heat integration. Their system behaviour is analyzed with regard to the degree of pre-reforming and the outlet temperature of the fuel processing module. The combination of allothermal pre-reforming with additively manufactured plate-fin heat exchangers exhibits the best heat integration performance at nominal full load and yields a partial load capability to up to 60% electrical load at net electrical efficiencies of 58 to 60% (LHV).

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Kohil, Ahmed, Hassan Farag, and Mona Ossman. "Mathematical modeling of a multi-stream brazed aluminum plate fin heat exchanger." Thermal Science 14, no. 1 (2010): 103–14. http://dx.doi.org/10.2298/tsci1001103k.

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The need for small size and lightweight heat exchangers in many applications has resulted in the development of many heat transfer surfaces. This type of heat exchanger is much more compact than can be practically realized with circular tubes. In this work a steady-state mathematical model that representing one of the plate fin heat exchangers enclosed in cold box of an ethylene plant has been developed. This model could evaluate the performance of the heat exchanger by predicting the outlet temperatures of the hot and cold streams when the inlet conditions are known. The model has been validated by comparing the results with actual operating values and the results showed good agreement with the actual data. Sensitivity analysis was applied on the model to illustrate the main parameters that have the greatest influence on the model calculated results. The sensitivity analysis showed that the hot stream outlet temperature is more sensitive to cold streams inlet temperatures and less sensitive to hot stream inlet temperature and thermal resistance (fouling), while the cold stream outlet temperature is more sensitive to cold streams inlet flow rate and less sensitive to fouling.

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Guo, Dong Cai, and Meng Liu. "Optimization Design of a New Safety Structure of Plate-Fin Heat Exchanger Using Genetic Algorithm." Applied Mechanics and Materials 423-426 (September 2013): 1996–2000. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1996.

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A safety structure of plate-fin heat exchanger is designed for some special applications to avoid fluid leakage from one fluid side to the other fluid side. A cavity is designed between two channels and a part of cavity volume is filled with good-thermal conductivity material which is divided into a number of columns. For better thermal performance of this structure, distribution of these columns is optimized. Genetic algorithm is used in optimization of distributions, it is effective and the output is better than the simple optimization. The structure in this paper can provide a new feasible structure of secure plate-fin heat exchanger, and the optimization results obtained by using genetic algorithm can provide some guidelines for the optimal designs of heat exchangers.

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Kim, Kyung Rae, Jae Keun Lee, Hae Do Jeong, Yul Ho Kang, and Young Chull Ahn. "Numerical and Experimental Study of Air-to-Air Plate Heat Exchangers with Plain and Offset Strip Fin Shapes." Energies 13, no. 21 (October 31, 2020): 5710. http://dx.doi.org/10.3390/en13215710.

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This study evaluates the performance of a plate heat exchanger numerically and experimentally. The predictive model for estimating the heat transfer and frictional pressure drop across the plain and offset strip fins is compared with the experimental results with the parameters of Reynolds number and fin pitch. The heat transfer of the offset fin shape is 13.4% higher than that of the plain fin in the experiment in the case of Re = 6112 for the hot airflow and Re = 2257 for the cold airflow. A predictive model uses the effectiveness-Number of Transfer Units (NTU) method with the discretization in the segments divided into small control volumes in the heat exchanger. The difference of heat transfer and pressure drop for the plain fin between the numerical and the experimental results are approximately 1.9% and 5.9%, respectively. Thus, the results indicate that the predictive model for estimating the heat transfer is useful for evaluating the performance of the plate heat exchanger in the laminar-to-transition regions.

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Ghazanfari, Seyed Alireza, and Malan Abdul Wahid. "HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP FOR FIN-AND-TUBE COMPACT HEAT EXCHANGERS WITH DELTA WINGLET-TYPE VORTEX GENERATORS." Facta Universitatis, Series: Mechanical Engineering 16, no. 2 (August 1, 2018): 233. http://dx.doi.org/10.22190/fume180117024g.

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Heat transfer rate, pressure loss and efficiency are considered as the most important parameters in designing compact heat exchangers. Despite different types of heat exchangers, fin-and-tube compact heat exchangers are still common device in different industries due to the diversity of usage and the low space installation need. The efficiency of the compact heat exchanger can be increased by introducing the fins and increasing the heat transfer rate between the surface and the surroundings. Numerous modifications can be applied to the fin surface to increase heat transfer. Delta-winglet vortex generators (VGs) are known to enhance the heat transfer between the energy carrying fluid and the heat transfer surfaces in plate-fin-and-tube banks, but they have drawbacks as well. They increase the pressure loss and this should be considered. In this paper, the thermal efficiency of compact heat exchanger with VGs is investigated in different variations. The angle of attack, the length and horizontal and vertical position of winglet are the main parameters to consider. Numerical analyses are carried out to examine finned tube heat exchanger with winglets at the fin surface in a relatively low Reynolds number flow for the inline tube arrangements. The results showed that the length of the winglet significantly affects the improvement of heat transfer performance of the fin-and-tube compact heat exchangers with a moderate pressure loss penalty. In addition, the results show that the optimization cannot be performed for one criterion only. More parameters should be considered at the same time to run the process properly and improve the heat exchanger efficiency.

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Marques, Christophe, and Kevin W. Kelly. "Fabrication and Performance of a Pin Fin Micro Heat Exchanger." Journal of Heat Transfer 126, no. 3 (June 1, 2004): 434–44. http://dx.doi.org/10.1115/1.1731341.

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Nickel micro pin fin heat exchangers can be electroplated directly onto planar or non-planar metal surfaces using a derivative of the LIGA micromachining process. These heat exchangers offer the potential to more effectively control the temperature of surfaces in high heat flux applications. Of particular interest is the temperature control of gas turbine engine components. The components in the gas turbine engine that require efficient, improved cooling schemes include the gas turbine blades, the stator vanes, the turbine disk, and the combustor liner. Efficient heating of component surfaces may also be required (i.e., surfaces near the compressor inlet to prevent deicing). In all cases, correlations providing the Nusselt number and the friction factor are needed for such micro pin fin heat exchangers. Heat transfer and pressure loss experimental results are reported for a flat parallel plate pin fin micro heat exchanger with a staggered pin fin array, with height-to-diameter ratios of 1.0, with spacing-to-diameter ratios of 2.5 and for Reynolds numbers (based on the hydraulic diameter of the channel) from 4000 to 20,000. The results are compared to studies of larger scale, but geometrically similar, pin fin heat exchangers. To motivate further research, an analytic model is described which uses the empirical results from the pin fin heat exchanger experiments to predict a cooling effectiveness exceeding 0.82 in a gas turbine blade cooling application. As a final point, the feasibility of fabricating a relatively complex micro heat exchanger on a simple airfoil (a cylinder) is demonstrated.

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Bala Sundar Rao, Ramisetty, G. Ranganath, and C. Ranganayakulu. "Colburn ‘j’ Factor and Fanning Friction Factor ‘f’ Correlations of Triangular Plain Fin Surface of a Compact Heat Exchanger Using CFD." Applied Mechanics and Materials 787 (August 2015): 207–11. http://dx.doi.org/10.4028/www.scientific.net/amm.787.207.

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This paper presents the heat transfer and friction coefficient correlations for triangular plain fin surfaces of plate fin compact heat exchanger. It will be prohibitively expensive and time consuming to fabricate heat exchanger cores and conduct experiments over reasonable ranges of all the geometric variables. In contrast, it is relatively easy and cost effective to carry out a parametric study through numerical simulation and derive acceptable correlations for use in industry. A numerical model has been developed for the triangular plain fin of plate fin heat exchanger. The CFD analysis is carried out using FLUENT 12.1, Colburn factor j and fanning friction factor f are calculated for different Reynolds numbers. These values are compared with the available literature data of j and f factors. The correlations have been expressed in terms of two separate equations over the low and high Re regions along with dimensionless geometric parameters.

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Kim, N. H., J. H. Yun, and R. L. Webb. "Heat Transfer and Friction Correlations for Wavy Plate Fin-and-Tube Heat Exchangers." Journal of Heat Transfer 119, no. 3 (August 1, 1997): 560–67. http://dx.doi.org/10.1115/1.2824141.

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This paper deals with heat exchangers having plate fins of herringbone wave configuration. Correlations are developed to predict the air-side heat transfer coefficient and friction factor as a function of flow conditions and geometric variables of the heat exchanger. Correlations are provided for both staggered and in-line arrays of circular tubes. A multiple regression technique was used to correlate 41 wavy fin geometries by Beecher and Fagan (1987), Wang et al. (1995), and Beecher (1968). For the staggered layout, 92 percent of the heat transfer data are correlated within ±10 percent and 91 percent of the friction data are correlated within ±15 percent.

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García-Castillo, Jorge, and Martín Picón-Núñez. "Physical Dimensions as a Design Objective in Heat Transfer Equipment: The Case of Plate and Fin Heat Exchangers." Energies 14, no. 8 (April 20, 2021): 2318. http://dx.doi.org/10.3390/en14082318.

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To incorporate exchanger dimensions as a design objective in plate and fin heat exchangers, a variable that must be taken into consideration is the geometry of the finned surfaces to be used. In this work, a methodology to find the surface geometry that will produce the required heat transfer coefficient and pressure drop to achieve the design targets was developed. The geometry of secondary surfaces can be specified by the fin density, which represents the number of fins per unit length. All other geometrical features, as well as the thermo-hydraulic performance, can be derived from this parameter. This work showed the way finned surfaces are engineered employing generalised thermo-hydraulic correlations as a part of a design methodology. It also showed that there was a volume space referred to as volume design region (VDR) where heat duty, pressure drop, and dimensions could simultaneously be met. Such a volume design region was problem- and surface-specific; therefore, its limits were determined by the heat duty, the pressure drop, and the type of finned surface chosen in the design. The application of this methodology to a case study showed that a shell and tube heat exchanger of 227.4 m2, with the appropriate fin density using offset strip-fins, could be replaced by a plate and fin exchanger with any combination of height, width, and length in the ranges of 0–0.58 m, 0–0.58 m, and 0–3.59 m. The approach presented in this work indicated that heat exchanger dimensions could be fixed as a design objective, and they could effectively be achieved through surface design.

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Ma, Hongqiang, Jiwei Jia, Xinmei Luo, Li Wang, Caiqin Hou, Gang Wang, and Yujin Zhang. "The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 76 (2021): 76. http://dx.doi.org/10.2516/ogst/2021063.

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In order to ensure the safe operation of heat exchangers in the Liquefied Natural Gas (LNG), the stress analysis model of aluminum Plate-Fin Structure (PFS) is established based on the thermal-elastic-plasticity theory. The residual stress distribution of PFS and its influence on the structural strength is analyzed by the thermal-structural coupling method. The results indicate that the residual stress distribution of PFS is very complex, and the residual stress reaches the peak at the Brazed Joint (BJ). Due to the equivalent stress at BJ near the fin is higher than that at BJ near the plate, cracks are more easily produced at BJ near the fin. Therefore, the existence of residual stress has a negative impact on PFS, which may increase the possibility of strength failure at BJ under the typical operating conditions (normal operation, cut-down and heat-up) of the heat exchanger. In addition, the residual stress gradually decreases with the brazing cooling rate decrease. The residual stress within the PFS will be effectively reduced by properly reducing the brazing cooling rate, which can slow down the strength failure of the PFS. The above research results will provide an important basis for the design and safe operation of the aluminum plate-fin heat exchanger.

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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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Tamilarasan, M. S. "Performance Analysis in Cross Flow Plate Fin Type Heat Exchanger." International Journal for Research in Applied Science and Engineering Technology 6, no. 6 (June 30, 2018): 470–79. http://dx.doi.org/10.22214/ijraset.2018.6073.

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MATSUI, Singo, Yasushi MUTO, and Yasuaki SHIINA. "K-2109 Stress Analysis of Plate-fin Type Heat Exchanger." Proceedings of the JSME annual meeting II.01.1 (2001): 567–68. http://dx.doi.org/10.1299/jsmemecjo.ii.01.1.0_567.

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Thirumarim, M., T. Kannadasan, and E. Ramasamy. "Simulation Studies on A Cross Flow Plate Fin Heat Exchanger." American Journal of Applied Sciences 5, no. 10 (October 1, 2008): 1318–21. http://dx.doi.org/10.3844/ajassp.2008.1318.1321.

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Kumar, Jitendra, Mukesh Goyal, and D. S. Pilkhwal. "Thermal performance evaluation method of multistream plate fin heat exchanger." Indian Journal of Cryogenics 44, no. 1 (2019): 135. http://dx.doi.org/10.5958/2349-2120.2019.00023.2.

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Matveev, S. A., and A. I. Smorodin. "Unevenness of flow distribution in plate-fin heat exchanger batteries." Chemical and Petroleum Engineering 49, no. 5-6 (September 2013): 320–22. http://dx.doi.org/10.1007/s10556-013-9748-y.

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Journal articles on the topic 'Plate-Fin heat exchanger'

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