Relevant bibliographies by topics / Numerical simulation of plate heat exchangers

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  2. Dissertations / Theses
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Academic literature on the topic 'Numerical simulation of plate heat exchangers'

Author: Grafiati
Published: 7 September 2021
Last updated: 1 February 2022

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Journal articles on the topic "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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Dissertations / Theses on the topic "Numerical simulation of plate heat exchangers"

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Al-Azzawi, Huda Jasim Mohammed [Verfasser]. "Numerical Simulation of Heat Transfer and Fluid Flow in Additively Manufactured Plate-Fin Heat Exchangers with Wavy Fins / Huda Jasim Mohammed Al-Azzawi." Hannover : Gottfried Wilhelm Leibniz Universität, 2021. http://d-nb.info/123822203X/34.

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Sarraf, Kifah. "Echangeurs à plaques corruguées en mode monophasique et en condensation : études expérimentale, numérique et analytique, et analyse des écoulements et des transferts thermiques." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4760/document.

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Ce travail de recherche examine aux échelles globale et locale les caractéristiques thermo-hydrauliques au sein des échangeurs à plaques ondulées pour les écoulements monophasiques et en mode condensation. Il comprend deux parties :La première partie concerne l'analyse des structures d'écoulement en mode monophasique à partir d'un outil de simulations numériques, et dont les résultats sont validés à partir d'une campagne expérimentale. L'exploitation des résultats de simulations, à partir d'observables judicieusement sélectionnées, a permis de quantifier les grandes classes d'écoulement en fonction des paramètres géométriques et fluidiques de l'échangeur. Ce nouvel éclairement sur les structures d'écoulement a conduit à la proposition d'un modèle général original sur les lois de friction au sein de ces échangeurs de géométrie d'écoulement complexe.La deuxième partie concerne l'étude de la condensation de la vapeur avec et sans surchauffe en entrée de l'échangeur. Ainsi, un dispositif expérimental permettant le contrôle précis des conditions aux limites a été développé, et une métrologie spécifique, basée sur la thermographie infrarouge a également été mis au point, afin de remonter à certaines grandeurs locales le long du condenseur (titre de vapeur, coefficient d'échange thermique...). On observe ainsi une très forte variabilité des coefficients d'échanges thermiques et de la densité de flux de chaleur le long du condenseur, et la surchauffe de la vapeur tend à intensifier les transferts thermiques. Ce complément de mesures remet en question certaines hypothèses de la littérature quant à l'élaboration de corrélations sur les transferts de chaleur dans les condenseurs
This research work examines at the global and local scales the thermo-hydraulic characteristics of plate heat exchangers with corrugated chevron plates, for single-phase and condensation flows. The study is divided into two parts:The first part concerns the analysis of flow structures of single-phase flows using numerical simulations, which are validated using the results of the experimental campaign. The analysis of the simulations results, from a flow characteristic observable that has been carefully chosen, has allowed quantifying the main flow categories as a function of the heat exchanger geometric parameters and the flow characteristics. This new information on the flow structures has led to the proposal of an original generalized model of the friction law inside this type of heat exchanger with complex geometry.The second part concerns the study of condensation with and without vapor superheating at the inlet of the heat exchanger. Thus, a specific experimental setup allowing precise control of the boundary conditions has been developed. Otherwise a specific metrology, based on infrared thermography, has been set to the point in order to determine the variation of certain local quantities along the condenser (vapor mass fraction, heat transfer coefficient...). Thus, we observe a high and wide variability of the heat transfer coefficients and the heat flux density along the condenser, and the superheating of the vapor tends to increase the heat transfers. These additional measures question certain assumptions of the literature regarding the development of heat transfer correlations in plate heat condensers
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Marques, Alfredo Manuel Nobre. "Modelação e avaliação do desempenho de permutadores de calor." Master's thesis, Universidade de Évora, 2009. http://hdl.handle.net/10174/20930.

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O estudo de permutadores de calor baseado em modelos é um tipo de abordagem que, nas últimas décadas, tem merecido particular atenção, tanto pelos investigadores como em desenvolvimento de aplicações práticas, já que estes equipamentos são equipamentos imprescindíveis no funcionamento da generalidade das indústrias, sistemas de energia (centrais termoeléctricas, refinarias, etc.), sistemas de climatização e sistemas de propulsão terrestre, aeronáutica e marítima. Em instalações de máquinas marítimas, os permutadores de calor são determinantes para o bom funcionamento do navio, pois são utilizados tanto na instalação propulsora como em vários sistemas auxiliares. Nos últimos anos, por motivos de eficiência e de espaço ocupado, tem-se assistido à substituição de permutadores de calor do tipo corpo cilíndrico e feixe tubular por permutadores de calor de placas. O presente trabalho centrou-se no estudo de permutadores de calor de placas, tendo como objectivo fundamental contribuir para o desenvolvimento do estado da arte neste domínio do conhecimento, através do ensaio e modelação de permutadores de calor de placas com corrugações do tipo "chevron". Desenvolveu-se em quatro fases. A primeira fase consistiu na obtenção de valores experimentais relativos a um permutador de calor de placas e a um permutador de corpo cilíndrico e feixe tubular, integrados numa bancada de ensaio de permutadores de calor, existente nos laboratórios da ENIDH (Escola Superior Náutica Infante D. Henrique). Para idênticas condições de funcionamento compararam-se valores experimentais, tendo-se assim verificado as razões que motivaram a substituição anteriormente referida. Ainda nesta fase efectuou­ se a análise da incerteza experimental, bem como a avaliação das grandezas que mais contribuem para essa incerteza. A segunda fase consistiu na modelação analítica do permutador de calor de placas, através da utilização de correlações existentes na bibliografia. Uma vez que os resultados obtidos não foram satisfatórios, estabeleceram-se novas correlações através das quais se desenvolveu um modelo cujos resultados mostraram uma boa concordância com os resultados experimentais. Para condições próximas da potência máxima, foi determinada a sensibilidade do modelo desenvolvido relativamente a variações possíveis de se verificar em instalações de máquinas marítimas. A terceira fase consistiu na simulação numérica tridimensional do permutador de calor de placas, utilizando um código comercial CFD, através da qual se analisou a influência das corrugações, das condições de fronteira e dos topos das placas no comportamento do permutador de calor de placas. Apesar de serem de aplicação trabalhosa e de processamento lento, as simulações numéricas conduziram a resultados satisfatórios, do ponto de vista de engenharia, e abrem caminho para a modelação de outras geometrias de permutadores de calor. A quarta fase consistiu na análise do comportamento do permutador de calor de placas quando os fluidos envolvidos fossem, para além da água doce, a água do mar e o óleo lubrificante (típicos de instalações de máquinas marítimas. Esta análise foi efectuada através do modelo analítico, baseado nas novas correlações desenvolvidas. - ABSTRACT: The study of heat exchangers based on models is an approach that has received major attention in the last decades, both in research and in the development of applications for industrial equipments. The use of heat exchangers is universal in power stations, refineries, air-conditioning systems and propulsion systems (land, aeronautical and maritime). ln marine power plants, heat exchangers are essential for the correct operation of the ship, considering they are used in main propulsion machinery and in auxiliary systems. During the last years, for reasons of efficiency and occupied space, conventional shell and tube heat exchangers have been replaced by more efficient and compact plate heat exchangers. This work is focused on the study of plate heat exchangers, being the key objective to contribute to the development of the state of the art in this field through testing and modeling of plate heat exchanger with corrugate plate type "chevron". The present work has been developed in four phases: The first phase consisted in obtaining experimental data of plate and shell and tube heat exchangers from a heat exchanger training bench existing at ENIDH (Escola Superior Náutica Infante D. Henrique). For identical operating conditions, experimental data has been analyzed and compared and reason that motivated the replacement of the heat exchangers has been confirmed. Also, in this working phase, experimental uncertainty and evaluation of the quantities that most contribute for this uncertainty have been analyzed. The second phase consisted in the analytical modeling of the same plate heat exchangers, through the use of correlations available in the literature. Since the results obtained were not satisfactory, new correlations were developed, which resulted in a new model that showed a good agreement with experimental data. For conditions dose to the maximum power, the sensitivity of the developed model was evaluated considering possible changes in the operating conditions of real marine propulsion plants. The third phase consisted three-dimensional numerical simulation of same plate heat exchangers, using a commercial computer fluid dynamics (CFD) application. The influence of plate configuration, boundary conditions and plate tops on the behavior of plate heat exchangers has been analyzed. Despite being laborious and a computationally heavy numerical simulations led to satisfactory result, from an engineering point of view, and open new possibilities for the simulation of heat exchangers with other geometrical configurations. The fourth phase consisted in the analysis of the heat exchanger performance when different fluids like fresh water, sea water and lubricating oil, typical of marine power plants. This analysis was carried out using the model based on new correlations developed in the phase two, mentioned above.
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TITO, JOSÉ MIGUEL MAYTA. "SIMULATION OF BRAZED PLATE HEAT EXCHANGERS FOR CASCADE VAPOR COMPRESSION SISTEM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18986@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
Desenvolveu-se um modelo de simulação para trocadores de calor de placas soldadas (BPHE – Brazed Plate Heat Exchanger) operando em regime permanente em um sistema de refrigeração em cascata por compressão de vapor, ou seja, condensador, trocador de calor intermediário (ou condensador em cascata) e evaporador. O modelo adota o método de análise local, onde o trocador de calor é dividido em uma série de pequenos volumes de controle, para os quais as equações de troca de calor e de conservação de massa e de energia são aplicadas. Para o calculo dos coeficientes locais de transferência de calor e fator de atrito foram utilizadas correlações disponíveis na literatura, considerando as regiões de escoamento monofásico ou bifásico em cada um dos trocadores, Estas correlações cobrem valores de fluxo de calor entre 2,5 kW/m2 e 185 kW/m2, temperaturas de saturação entre 5 graus Celsius e 30 graus Celsius, e aplicam-se a geometrias com ângulos de corrugação entre 20 e 60 graus. Um programa computacional foi desenvolvido em FORTRAN para o cálculo do desempenho térmico dos trocadores de calor e das correlações de asida dos dois fluidos. Na simulação foram consideradas conhecidas as condições de entrada dos fluidos e a geometria do trocador. As propriedades termo-físicas dos fluidos foram calculadas utilizandose a mais recente versão do padrão NIST de referência de propriedades termodinâmicas e de transporte (REFPROP 9.0), permitindo a simulação dos trocadores de calor operando com uma vasta gama de refrigerantes. Os resultados da simulação foram comparados com os dados experimentais (condensador e evaporador) levantados por outros autores para os refrigerantes R22 e R290, tendose obtido boa concordância. Uma analise de sensibilidade para os trocadores de calor, utilizando os novos refrigerantes R1234yf e R1234ze, foi também realizada.
A simulation model of brazed plate heat exchangers (BPHE) operating in steady-state in a cascade vapor compression refrigeration system has been developed. For this system the heat exchangers were the condenser, intermediate heat exchanger or cascade-condenser and evaporator. The model adopts a local analysis method, where the heat exchanger is divided into a series of small control volumes, to which the heat transfer rate equations and the fundamental of conservation of mass and energy equation. Local heat exchanger coefficients and friction factor are calculated using correlations available in literature, considering regions of single-phase or twophase flow for each one of the heat exchangers. These correlations have heat flux values ranging from 2,5kW/m2 to 185kW/m2, saturation temperatures from 5 degrees Celsius to 35 degrees Celsius and were applied to geometries with corrugation angle ranging from 20 degrees to 60 degrees. In order to calculate the thermal performance of the heat exchangers and the output conditions of the two fluids a computational program was developed in FORTRAN. This simulation considers known inlet conditions of the fluids and the geometry of the heat exchanger. The thermophysical properties of the refrigerants fluids were calculated using the version 7 of REFPROP, a package by NIST (National Institute of Standards and Technology), that allow for the simulation of heat exchangers with a wide operating range of refrigerants. The simulation results were compared with experimental data (condenser and evaporator) for R22 and R290 refrigerants, obtaining a good agreement. A sensibility analysis for heat exchangers, using the new R1234yf and R1234ze has also been carried out.
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Galati, Chiara. "Experimental and numerical study of flow distribution in compact plate heat exchangers." Phd thesis, Toulouse, INPT, 2017. http://oatao.univ-toulouse.fr/19928/1/GALATI_Chiara.pdf.

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This PhD work was motivated by the CEA R&D program to provide solid technological basis for the use of Brayton power conversion system in Sodium-cooled Fast nuclear Reactors (SFRs). Multi-channel compact heat exchangers are necessary for the present application because of the low heat transfer capacity of the gas foreseen. In ASTRID project, a minimum size of Na channels section is required to avoid the plugging risk. However, this induces very low pressure losses in the bundle. Considering an additional inlet flow condition, a real risk of bad flow distribution remains. As a result, the thermal performance and thermal loading of the heat exchanger degrades due to it. The main goal of this work was to overcome the flow maldistribution problem by means of an innovative design of sodium distribution system (PATENT FR1657543), the development of a numerical strategy and the construction of an experimental database to validate all theoretical studies. The innovative sodium distribution system consists on an inlet header which tries to guide the evolution of the impinging jet flow while a system of bifurcating pre-distribution channels increases pressure drops in the bundle. Lateral communications between pre-distribution channels are introduced to further homogenize the flow. Two experimental facilities have been conceived to study the flow behavior in bifurcating channels and in the inlet header, respectively. At the same time, their effect on the flow distribution between channels is evaluated. The acquired PIV aerodynamic database allows to validate the numerical models and to prove the design basis for the proposed distribution system. Once having validated the CFD turbulence models and the strategy to study the flow maldistribution in the SGHE module, a decisive and trustworthy optimization of each component of the sodium distribution system has been performed. Finally, an optimal configuration has been proposed for the actual phase of ASTRID project.
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Protheroe, Michael. "Simulation of variable fluid-properties plate heat exchanger for educational purposes thesis submitted in partial fulfilment of the Masters degree in Engineering, Auckland University of Technology, October 2003." Full thesis. Abstract, 2003. http://puka2.aut.ac.nz/ait/theses/ProtheroeM.pdf.

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Rastan, Hamidreza. "Investigation of the heat transfer of enhanced additively manufactured minichannel heat exchangers." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264278.

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Mini-/microchannel components have received attention over the past few decades owing to their compactness and superior thermal performance. Microchannel heat sinks are typically manufactured through traditional manufacturing practices (milling and sawing, electrodischarge machining, and water jet cutting) by changing their components to work in microscale environments or microfabrication techniques (etching and lost wax molding), which have emerged from the semiconductor industry. An extrusion process is used to produce multiport minichannel-based heat exchangers (HXs). However, geometric manufacturing limitations can be considered as drawbacks for all of these techniques. For example, a complex out-of-plane geometry is extremely difficult to fabricate, if not impossible. Such imposed design constraints can be eliminated using additive manufacturing (AM), generally known as three-dimensional (3D) printing. AM is a new and growing technique that has received attention in recent years. The inherent design freedom that it provides to the designer can result in sophisticated geometries that are impossible to produce by traditional technologies and all for the redesign and optimization of existing models. The work presented in this thesis aims to investigate the thermal performance of enhanced minichannel HXs manufactured via metal 3D printing both numerically and experimentally. Rectangular winglet vortex generators (VGs) have been chosen as the thermal enhancement method embedded inside the flat tube. COMSOL Multiphysics, a commercial software package using a finite element method (FEM), has been used as a numerical tool. The influence of the geometric VG parameters on the heat transfer and flow friction characteristics was studied by solving a 3D conjugate heat transfer and laminar flow. The ranges of studied parameters utilized in simulation section were obtained from our previous interaction with various AM technologies including direct metal laser sintering (DMLS) and electron-beam melting (EBM). For the simulation setup, distilled water was chosen as the working fluid with temperaturedependent thermal properties. The minichannel HX was assumed to be made of AlSi10Mg with a hydraulic diameter of 2.86 mm. The minichannel was heated by a constant heat flux of 5 Wcm−2 , and the Reynolds number was varied from 230 to 950. A sensitivity analysis showed that the angle of attack, VG height, VG length, and longitudinal pitch have notable effects on the heat transfer and flow friction characteristics. In contrast, the VG thickness and the distance from the sidewalls do not have a significant influence on the HX performance over the studied range. On the basis of the simulation results, four different prototypes including a smooth channel as a reference were manufactured with AlSi10Mg via DMLS technology owing to the better surface roughness and greater design uniformity. A test rig was developed to test the prototypes. Owing to the experimental facility and working fluid (distilled water), the experiment was categorized as either a simultaneously developing flow or a hydrodynamically developed but thermally developing flow. The Reynolds number ranged from 175 to 1370, and the HX was tested with two different heat fluxes of 1.5 kWm−2 and 3 kWm−2 . The experimental results for the smooth channel were compared to widely accepted correlations in the literature. It was found that 79% of the experimental data were within a range of ±10% of the values from existing correlations developed for the thermal entry length. However, a formula developed for the simultaneously developing flow overpredicted the Nusselt number. Furthermore, the results for the enhanced channels showed that embedding VGs can considerably boost the thermal performance up to three times within the parameters of the printed parts. Finally, the thermal performance of the 3D-printed channel showed that AM is a promising solution for the development of minichannel HXs. The generation of 3D vortices caused by the presence of VGs ii can notably boost the thermal performance, thereby reducing the HX size for a given heat duty.
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Paniagua, Sánchez Leslye. "Three-dimensional numerical simulation of fluid flow and heat transfer in fin-and-tube heat exchangers at different flow regimes." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/277561.

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This thesis aims at unifying two distinct branches of work within the Heat Transfer Technological Center (CTTC). On one side, extensive experimental work has been done during the past years by the researchers of the laboratory. This experimental work has been complemented with numerical models for the calculation of fin and tube heat exchangers thermal and fluid dynamic behavior. Such numerical models can be referred to as fast numerical tool which can be used for industrial rating and design purposes. On the other hand, the scientists working at the research center have successfully developed a general purpose multi-physics Computational Fluid Dynamics (CFD) code (TermoFluids). This high performance CFD solver has been extensively used by the co-workers of the group mainly to predict complex flows of great academic interest. The idea of bringing together this two branches, comes from the necessity of a reliable numerical platform with detailed local data of the flow and heat transfer on diverse heat exchanger applications. Being able to use local heat transfer coefficients as an input on the rating and design tool will lead to affordable and accurate prediction of industrial devices performance, by which the center can propose enhanced alternatives to its industrial partners. To accomplish these goals, several contributions have been made to the existing TermoFluids software which is in continuous evolution in order to meet the competitive requirements. The most significant problematics to adequately attack this problem are analyzed and quite interesting recommendations are given. Some of the challenging arising issues involve the generation of suitable and affordable meshes, the implementation and validation of three dimensional periodic boundary condition and coupling of different domains with important adjustments for the study of cases with different flow physics like time steps and thermal development. Turbulence is present in most of engineering flows, and refrigeration evaporator heat exchangers are not an exception. The presence of many tubes (acting like bluff bodies for the flow) arranged in different configurations and the fact that the flow is also confined by fins, create complex three dimensional flow features that have usually turbulent or transition to turbulent regime. Therefore, three dimensional turbulent forced convection in a matrix of wall-bounded pins is analyzed. Large Eddy Simulations (LES) are performed in order to assess the performance of three different subgrid-scale models, namely WALE, QR and VMS. The Reynolds numbers of the study were set to 3000, 10000 and 30000. Some of the main results included are the pressure coefficient around the cylinders, the averaged Nusselt number at the endwalls and vorticity of the flow. The final part of the thesis is devoted to study the three dimensional fluid flow and conjugated heat transfer parameters encountered in a plate fin and tube heat exchanger used for no-frost refrigeration. The numerical code and post processing tools are validated with a very similar but smaller case of a heat exchanger with two rows of tubes at low Reynolds for which experimental data is available. The next analysis presented is a typical configuration for no-frost evaporators with double fin spacing (for which very few numerical data is reported in the scientific literature). Conjugated convective heat transfer in the flow field and heat conduction in the fins are coupled and considered. The influence of some geometrical and flow regime parameters is analyzed for design purposes. In conclusion, the implementations and general contributions of the present thesis together with the previous existent multi-physics computational code, has proved to be capable to perform successful top edge three dimensional simulations of the flow features and heat transfer mechanisms observed on heat exchanger devices.
Esta tesis tiene como objetivo unificar dos ramas de trabajo dentro del Centro Tecnológico de Transferencia de Calor (CTTC). Por un lado, se ha realizado un amplio trabajo experimental durante los últimos años. Este trabajo experimental se ha complementado con modelos numéricos para el estudio de intercambiadores de calor de tipo aleta-tubo. Tales modelos numéricos pueden considerarse una herramienta numérica de bajo coste empleada con propósitos de diseño principalmente. Por otro lado, los científicos que trabajan en el centro han desarrollado con éxito un código de Dinámica de Fluidos Computacionales (TermoFluids). Este código de alto rendimiento ha sido ampliamente utilizado principalmente para predecir flujos complejos de gran interés académico. La idea de unir a estas dos ramas, proviene de la necesidad de una plataforma numérica fiable con datos locales propios del flujo y de la transferencia de calor en diversas aplicaciones de intercambiadores de calor. Ser capaz de generar coeficientes locales de transferencia de calor para abastecer con datos propios los modelos existentes de bajo coste, permitirá la correcta predicción del rendimiento de dichos dispositivos. Para lograr estos objetivos, se han hecho varias contribuciones al código TermoFluids que está en continua evolución. Algunas de las mayores cuestiones que se plantean implican la generación de mallas adecuadas y asequibles, la implementación y validación de la condición de contorno periódica tridimensional y el acoplamiento de los diferentes dominios para el estudio de casos con diferentes comportamientos físicos, como desarrollo transitorio e inercia térmica. La turbulencia está presente en la mayoría de los flujos de ingeniería, y los intercambiadores de calor de evaporadores para refrigeración no son una excepción. La presencia de muchos tubos (que actúan como obstáculos para el fluido) colocados en diferentes configuraciones y el hecho de que el flujo también está confinado por aletas, crean características de flujo tridimensionales complejas que tienen generalmente régimen turbulento o en transición. Por lo tanto, se analiza la convección forzada turbulenta en una matriz de pines delimitados por paredes. simulando las grandes escalas de turbulencia y modelando las pequeñas (LES) con el fin de evaluar el desempeño de los tres modelos seleccionados, a saber WALE, QR y VMS. Los números de Reynolds establecidos para el estudio son 3000, 10000 y 30000. Algunos de los principales resultados que se incluyen son el coeficiente de presión alrededor los cilindros, el número de Nusselt promedio en las paredes y la vorticidad del flujo. La parte final de la tesis se dedica a estudiar el flujo tridimensional y los parámetros de transferencia de calor encontrados en un intercambiador de calor de tipo aleta-tubo utilizado para la refrigeración doméstica en equipos de 'no-escarcha'. Las implementaciones del código y el postproceso numéricos se validan en un caso muy similar para un intercambiador de calor con dos filas de tubos a bajos Reynolds para el cual se dispone de datos experimentales. El siguiente análisis que se presenta es una configuración típica para evaporadores 'no-escarcha' con paso de aleta doble (para el que se tiene muy poca información numérica en la literatura). Se considera el acoplamiento conjugado de la transferencia de calor convectiva entre fluido y sólido y conductiva dentro de la aleta. La influencia de algunos parámetros geométricos y de régimen de flujo se analizan con propósitos de diseño. En conclusión, las contribuciones generales de esta tesis junto con el código computacional ya existente, ha demostrado ser capaz de realizar con éxito simulaciones tridimensionales para predecir las características del flujo y los mecanismos responsables de la transferencia de calor en intercambiadores de calor de tipo aleta-tubo
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Panse, Satchit Pradip. "A Numerical Investigation of Thermal-Hydraulic Characteristics in Three Dimensional Plate and Wavy Fin-Tube Heat Exchangers for Laminar and Transitional Flow Regimes." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/panse/PanseS0805.pdf.

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The plate fin-and-tube heat exchangers are used in wide variety of industrial applications, particularly in the heating, air-conditioning and refrigeration industries. In most cases the working fluid is liquid on the tube side exchanging heat with a gas, usually air. The current study is focused on two fin configurations, the plain plate-fin and the wavy-fin. These two fin configurations are numerically investigated in both staggered and in-lined tube layouts. The present investigation ranges from laminar flow regime into the sub-critical or transitional flow regime. The suitability of the eddy viscosity turbulence models for the flow representation in the transitional flow regime is discussed in this study. This study reveals that the flow distinction between plain and wavy fin has a profound influence on the heat transfer and flow friction performance of these configurations when compared on the basis of tube layouts. The obtained results also indicate that the number of tube rows plays an important part for the overall heat exchanger performance and an optimum choice for the number of tube rows must be made in order to achieve the critical balance between high heat transfer performance and low pressure drop. It was observed that for an optimum number of tube rows, increasing the longitudinal or transverse tube pitch causes a decrease in the thermal and hydraulic performance of the heat exchanger. For the transitional flow regime, the k-ω turbulence model was found to be more suitable than the k-ε based turbulence models. This suitability of the k-ω turbulence model was linked to the better near wall treatment by this model as compared to the k-ε based models. The results for the fin pitch study indicated that the decrease in the fin pitch causes a decrease in both heat transfer and flow friction characteristics for the transitional flow regime. The results also suggested that for the transitional flow regime, for an equal wavy height, the thermal and hydraulic performance is increased as the wavy angle is increased. On the other hand, for an equal wavy angle, it is decreased as the wavy height is increased.
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ZHANG, JIEHAI. "NUMERICAL SIMULATIONS OF STEADY LOW-REYNOLDS-NUMBER FLOWS AND ENHANCED HEAT TRANSFER IN WAVY PLATE-FIN PASSAGES." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109015881.

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Books on the topic "Numerical simulation of plate heat exchangers"

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Numerical Simulation of Heat Exchangers. CRC Press, 2017. http://dx.doi.org/10.1201/9781315372587.

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Numerical Simulation of Heat Exchangers: Advances in Numerical Heat Transfer. Taylor & Francis Group, 2017.

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Sparrow, E. M., J. P. Abraham, W. J. Minkowycz, and J. M. Gorman. Numerical Simulation of Heat Exchangers: Advances in Numerical Heat Transfer Volume V. Taylor & Francis Group, 2017.

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Sparrow, E. M., J. P. Abraham, W. J. Minkowycz, and J. M. Gorman. Numerical Simulation of Heat Exchangers: Advances in Numerical Heat Transfer Volume V. Taylor & Francis Group, 2017.

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Sparrow, E. M., J. P. Abraham, W. J. Minkowycz, and J. M. Gorman. Numerical Simulation of Heat Exchangers: Advances in Numerical Heat Transfer Volume V. Taylor & Francis Group, 2017.

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Sparrow, E. M., J. P. Abraham, W. J. Minkowycz, and J. M. Gorman. Numerical Simulation of Heat Exchangers: Advances in Numerical Heat Transfer Volume V. Taylor & Francis Group, 2017.

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Li, Zhixiong, Ahmad Shafee, Iskander Tlili, and M. Jafaryar. Nanofluid in Heat Exchangers for Mechanical Systems: Numerical Simulation. Elsevier, 2020.

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Bae, Young Lib. Performance of rotary regenerative heat exchanger--a numerical simulation. 1986.

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C, Tew Roy, Dudenhoefer James E, and United States. National Aeronautics and Space Administration., eds. Two-dimensional numerical simulation of a Stirling engine heat exchanger. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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C, Tew Roy, Dudenhoefer James E, and United States. National Aeronautics and Space Administration., eds. Two-dimensional numerical simulation of a Stirling engine heat exchanger. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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Book chapters on the topic "Numerical simulation of plate heat exchangers"

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Song, Jiafang, Shuhui Liu, and Xiangquan Meng. "Numerical Simulation and Optimization of Air–Air Total Heat Exchanger with Plate-Fin." In Environmental Science and Engineering, 287–95. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9524-6_31.

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Shang, Xiaobiao, Junruo Chen, Weifeng Zhang, Jinyan Shi, Guo Chen, and Jinhui Peng. "Numerical Simulation of Microwave Absorption of Regenerative Heat Exchangers Subjected to Microwave Heating." In 5th International Symposium on High-Temperature Metallurgical Processing, 605–11. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118887998.ch75.

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Khavin, Gennadii. "Simulation and Design of Welded Plate Heat Exchangers with Channels of Different Corrugation Height." In Lecture Notes in Mechanical Engineering, 453–62. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93587-4_47.

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Saha, Sujoy Kumar, Hrishiraj Ranjan, Madhu Sruthi Emani, and Anand Kumar Bharti. "Wavy Fin, 3D Corrugated Fin, Perforated Fin, Pin Fin, Wire Mesh, Metal Foam Fin, Packings, Numerical Simulation." In Heat Transfer Enhancement in Plate and Fin Extended Surfaces, 89–135. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20736-6_5.

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Kumar, Anuj, Rohit Kothari, Pushpanjay K. Singh, M. P. Paulraj, Santosh K. Sahu, and Shailesh I. Kundalwal. "Numerical Simulation of PCM-Based Heat Sink with Plate Fins for Thermal Management of Electronic Components." In Lecture Notes in Mechanical Engineering, 207–17. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4165-4_20.

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Terfai, Abdelkrim, Younes Chiba, Mounir Zirari, and Mohamed Najib Bouaziz. "Numerical Simulation of a Flat-Plate Solar Collector Operating Under Open Cycle Mode of Heat Extraction." In Advances in Green Energies and Materials Technology, 153–58. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0378-5_21.

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Roxana, Grigore, Popa Sorin, Hazi Aneta, and Hazi Gheorghe. "Study Regarding Numerical Simulation of Counter Flow Plate Heat Exchanger." In Numerical Analysis - Theory and Application. InTech, 2011. http://dx.doi.org/10.5772/24113.

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Syaiful and M. Kurnia Lutfi. "Numerical Investigation of Heat Transfer and Fluid Flow Characteristics in a Rectangular Channel with Presence of Perforated Concave Rectangular Winglet Vortex Generators." In Heat Transfer - Design, Experimentation and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96117.

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The high thermal resistance of the airside of the compact heat exchanger results in a low heat transfer rate. Vortex generator (VG) is one of the effective passive methods to increase convection heat transfer by generating longitudinal vortex (LV), which results in an increase in fluid mixing. Therefore, this study aims to analyze the convection heat transfer characteristics and the pressure drop of airflow in a rectangular channel in the presence of a concave rectangular winglet VG on a heated plate. Numerical calculations were performed on rectangular winglet pairs vortex generators (RWP VGs) and concave rectangular winglet pairs vortex generators (CRWP VGs) with a 45° angle of attack and one, two, and three pairs of VGs with and without holes. The simulation results show that the decrease in the value of convection heat transfer coefficient and pressure drop on CRWP with three perforated VG configuration is 4.63% and 3.28%, respectively, of the three pairs of CRWP VG without holes at an airflow velocity of 2 m/s.
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Murshed, S. M. Sohel, and Manuel L. Matos Lopes. "Introductory Chapter: An Overview of Design, Experiment and Numerical Simulation of Heat Exchangers." In Heat Exchangers - Design, Experiment and Simulation. InTech, 2017. http://dx.doi.org/10.5772/intechopen.68472.

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Kauschke, M., and H. Quack. "Numerical Simulation of Countercurrent Heat Exchangers in Cryogenic Systems." In Proceedings of the Sixteenth International Cryogenic Engineering Conference/International Cryogenic Materials Conference, 465–68. Elsevier, 1997. http://dx.doi.org/10.1016/b978-008042688-4/50108-3.

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Conference papers on the topic "Numerical simulation of plate heat exchangers"

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Ali, Muhammad Ansab, Tariq S. Khan, and Ebrahim Al Hajri. "Numerical Simulation of Manifold Microchannel Heat Exchanger." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66960.

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The quest to achieve higher heat transfer rate, smaller size and minimum pressure drop is a main area of focus in the design of heat exchangers. Plate heat exchangers are one of viable candidates to deliver higher heat duties but still have a drawback of higher pressure drop due to long restricted flow path. Motivated by demand of miniaturization and cost reduction, a novel design of tubular microchannel heat exchanger for single phase flow employing ammonia water mixture is proposed. Numerical simulation of unit fluid domain is conducted in ANSYS Fluent. Parametric study of the different flow geometries is evaluated in terms of Nusselt number and pressure drop. The salient features of the design include ultra-compact size with higher heat transfer rate and acceptable pressure drop.
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Dietrich, Alexander, Mario Nowitzki, Ron van de Sand, and Joerg Reiff-Stephan. "Numerical Simulation Of Condensing Ammonia In Plate Heat Exchangers Using CFD." In 34th International ECMS Conference on Modelling and Simulation. ECMS, 2020. http://dx.doi.org/10.7148/2020-0041.

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Tamakuwala, Harsh, Ryan Von Ness, and Debjyoti Banerjee. "Numerical Modeling of Chevron Plate Heat Exchangers for Thermal Management Applications." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7312.

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Plate-fin heat exchangers are widely used in industries especially aerospace, cryogenics, food and chemical process industries where high heat flux surface area per unit volume is of prime importance. These heat exchangers consists of series of corrugated plates (herringbone or chevron), separated by gasket sealing. Chevron angled plates are one of the most commonly used type of geometry. The complex design of chevron plate heat exchanger, induces high turbulence and flow reversals causing high heat transfer through the plates. This paper discusses about the computational fluid dynamics simulations conducted over a simplified geometry of Chevron Plate Heat Exchanger to understand the formulation of vortices at different Reynold’s number for various aspect ratios. A single phase laminar flow with periodic boundary condition is used for analysis of the fluid behavior in a unit pattern of the corrugation geometry. Based on different flow and geometric conditions, varying amounts of swirl-flows are observed and different behavior of shear stress and heat transfer plot along the length of the plate is observed. At higher Reynolds numbers (Re), the re-circulations and mixing by the induced vortices causes significant rise of heat flux, with marginal increase in friction factor.
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Li, Wei, and Hongxia Li. "Numerical Analysis of Composite Fouling in Corrugated Plate Heat Exchanger." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17075.

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This paper provides a numerical analysis on precipitation and particulate fouling in a corrugated plate heat exchanger. This analysis started from the mass balance fouling model, and Realizable κ-ε model with non-equilibrium wall functions is used in the 3D numerical simulation considering the realistic geometries of the flow channel to obtained Nusselt number and wall shear stress, while Von-Karman analogy is used to obtain mass transfer coefficient. The numerical analysis is verified by experimental study. The predicted influence of fluid velocity in fouling resistance is compatible with experimental data that it can help to optimize the design of plate heat exchangers. The investigation significantly simplifies the fouling analysis of complex flow fields and can be used to assess the fouling potential of corrugated plate heat exchangers.
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Zhang, Li-Zhi. "A Large Eddy Simulation (LES) of Plate-Fin and Tube Heat Exchangers." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22030.

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Plate-fin and tube heat exchangers are extensively studied both experimentally and numerically. With a large eddy simulation technique (LES), this study performs a detailed investigation of the temporal oscillations of streamwise, spanwise and normal velocity components in the exchanger passage and their effects on heat transfer between fins and fluid. Focus is on the instability and transitional behavior of fluid flow in the exchanger. Temporal variations of instantaneous velocity found that even under very low frontal velocities, the fluid exhibits some degree of oscillations, which change from periodic, regular fluctuations to aperiodic, chaotic turbulence with increasing Reynolds numbers. Contrary to the vortex shedding in a bare tube bank, the flow in the exchanger is more like a duct flow, with steady vortexes formed behind each tube. A frequency spectrum analysis of velocity fluctuations further proves that vortex shedding is not the dominant mechanism for momentum and heat transfer. Rather, tube induced oscillations are the dominant factor.
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Liu, Baochang, Caifu Qian, Jiandong Zou, and Yiming He. "Research on Numerical Simulation Technology of Spiral Plate Heat Exchanger." In 2019 International Conference on Intelligent Computing, Automation and Systems (ICICAS). IEEE, 2019. http://dx.doi.org/10.1109/icicas48597.2019.00039.

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Lee, Myungsung, Jae Hyuk Jung, and Nahmkeon Hur. "A Numerical Analysis for the Flow and Heat Transfer in a Large Plate Heat Exchanger by Using a Porous Media Approach." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-03036.

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A numerical analysis was conducted to investigate the flow and heat transfer in a large plate heat exchanger. For the purpose of investigation on the whole flow field inside a large plate heat exchanger, the microscopic method by using actual geometry is not practical since it requires huge computational resources. In the present study, a semi-microscopic method by using a porous media approach has been adopted in order to predict the overall flow and heat transfer performance for the large plate heat exchanger. The pressure drop and heat transfer characteristics of the flow passages inside the heat exchanger was obtained first from the microscopic simulation for the flow inside passages and heat transfer through the plates by using the detailed geometry of one representative repeating section of the heat transfer plate. These results were used as characteristics of the porous media replacing the complex flow passages to simulate the large plate heat exchanger as a whole. The overall performance predicted from the semi-microscopic method agrees well with available experimental data. The numerical method in the present study can be applicable to the different types of large heat exchangers that have complex geometry in order to predict the overall performance.
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Zhang, Chao, Farzad A. Shirazi, Bo Yan, Terrence W. Simon, Perry Y. Li, and James Van de Ven. "Design of an Interrupted-Plate Heat Exchanger Used in a Liquid-Piston Compression Chamber for Compressed Air Energy Storage." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17484.

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In the Compressed Air Energy Storage (CAES) approach, air is compressed to high pressure, stored, and expanded to output work when needed. The temperature of air tends to rise during compression, and the rise in the air internal energy is wasted during the later storage period as the compressed air cools back to ambient temperature. The present study focuses on designing an interrupted-plate heat exchanger used in a liquid-piston compression chamber for CAES. The exchanger features layers of thin plates stacked in an interrupted pattern. Twenty-seven exchangers featuring different combinations of shape parameters are analyzed. The exchangers are modeled as porous media. As such, for each exchanger shape, a Representative Elementary Volume (REV), which represents a unit cell of the exchanger, is developed. The flow through the REV is simulated with periodic velocity and thermal boundary conditions, using the commercial CFD software ANSYS FLUENT. Simulations of the REVs for the various exchangers characterize the various shape parameter effects on values of pressure drop and heat transfer coefficient between solid surfaces and fluid. For an experimental validation of the numerical solution, two different exchanger models made by rapid prototyping, are tested for pressure drop and heat transfer. Good agreement is found between numerical and experimental results. Nusselt number vs. Reynolds number relations are developed on the basis of pore size and on hydraulic diameter. To analyze performance of exchangers with different shapes, a simplified zero-dimensional thermodynamic model for the compression chamber with the inserted heat exchange elements is developed. This model, valuable for system optimization and control simulations, is a set of ordinary differential equations. They are solved numerically for each exchanger insert shape to determine the geometries of best compression efficiency.
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Luo, Xing, Guo-Yan Zhou, Long-Wei Cong, Marco Fuchs, and Stephan Kabelac. "Numerical Simulation of Heat Transfer and Fluid Flow in 3D-Printed High-Temperature Plate-Fin Heat Exchangers with OpenFoam." In Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019). Connecticut: Begellhouse, 2019. http://dx.doi.org/10.1615/ihmtc-2019.960.

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El Boujaddaini, Mohamed Najib, Philippe Haberschill, Abdelaziz Mimet, and Andre Lallemand. "MODELLING AND NUMERICAL SIMULATION OF STABILIZED ICE SLURRY IN PLANE PLATE HEAT EXCHANGER: THE THERMAL BEHAVIOUR." In Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2008. http://dx.doi.org/10.1615/ichmt.2008.cht.760.

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