Relevant bibliographies by topics / Internal heat exchanger

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Internal heat exchanger'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Internal heat exchanger"

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Li, Jie. "Numerical Research in Effects of Baffles on Heat Transfer Characteristics of a Tunnel Kiln’s Flue Gas Heat Exchanger." Advanced Materials Research 953-954 (June 2014): 911–14. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.911.

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In order to investigate effects of baffles on heat transfer characteristics of a tunnel kiln’s flue gas heat exchanger, the flow fields and temperature fields in two exchangers, one with baffles and the other without, under operative conditions, are separately simulated by using FLUENT code. According to simulation results, average temperature at the air outlet and average pressure at the air inlet of the exchanger with baffles are separately 67.2°C and 265 Pa, and those in the case of the exchanger without baffles are respectively 60.4°C and 240 Pa. Reasons why the baffles exert high influence on heat transfer characteristics of the exchanger are analyzed. On basis of the data and analysis, two conclusions are drawn: (1) Installation of baffles exerts high influence on heat transfer characteristics of the heat exchanger studied. (2) The reason why the baffles could exert such influence is that the baffles prevent much air from flowing into external zones of the baffles, so in per unit time more air exchanges heat energy with hot walls of heat exchange tubes, which are in internal zones of the baffles.
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Zhelykh, Vasyl, Olena Savchenko, and Vadym Matusevych. "Horizontal earth-air heat exchanger for preheating external air in the mechanical ventilation system." Selected Scientific Papers - Journal of Civil Engineering 13, no. 1 (December 1, 2018): 71–76. http://dx.doi.org/10.1515/sspjce-2018-0021.

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Abstract To save traditional energy sources in mechanical ventilation systems, it is advisable to use low-energy ground energy for preheating or cooling the outside air. Heat exchange between ground and outside air occurs in ground heat exchangers. Many factors influence the process of heat transfer between air in the heat exchanger and the ground, in particular geological and climatic parameters of the construction site, parameters of the ventilation air in the projected house, physical and geometric parameters of the heat exchanger tube. Part of the parameters when designing a ventilation system with earth-air heat exchangers couldn’t be changed. The one of the factors, the change which directly affects the process of heat transfer between ground and air, is convective heat transfer coefficient from the internal surface of the heat exchanger tube. In this article the designs of a horizontal earthair heat exchanger with heat pipes was proposed. The use of heat pipes in designs of a horizontal heat exchanger allows intensification of the process of heat exchange by turbulence of air flow inside the heat exchanger. Besides this, additionally heat transfer from the ground to the air is carried out at the expense of heat transfer in the heat pipe itself.
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Fyk, Мykhailo, Volodymyr Biletskyi, Madjid Аbbood, and Fabris Аnzian. "Geothermal heat use to eliminate hydrate formations in oil deposit injection wells." E3S Web of Conferences 230 (2021): 01019. http://dx.doi.org/10.1051/e3sconf/202123001019.

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The article is devoted to an actual issue: the development of internal downhole heat exchangers technology to combat hydration in injection wells. Purpose: development of conceptual solutions for the use of geothermal coolant in the internal well heat exchanger of the injection well. A scheme of an internal downhole heat exchanger with a geothermal heat carrier has been developed, and includes a supply line of a geothermal carrier through the heat exchange surface of the injection well into the productive reservoir of the oil field. The scheme provides targeted utilization of thermobaric energy of a geothermal source to combat hydration in the injection well. A mathematical apparatus for describing the process of heat utilization and heat exchange in injection well is proposed. It is established that the capacity of one geothermal well discovered at the oil depths in the Dnipro-Donetsk basin is sufficient to eliminate hydration in 1-3 injection wells, and determines the feasibility of their joint work.
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Harris, D. K., D. G. Warren, and V. W. Goldschmidt. "Impact of Manifold Design on Heat Exchanger Efficiency." Journal of Heat Transfer 119, no. 2 (May 1, 1997): 357–62. http://dx.doi.org/10.1115/1.2824232.

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The impact of manifold design on single-phase heat exchanger effectiveness is studied using the NTU-Effectiveness method. Manifolds are devices that redistribute the internal flow stream of a heat exchanger from one to several passages. Two manifold types are identified: collector box and direct split designs. The particular application considered is that of a gas fired forced air heating system. A general enhancement analysis is performed which covers four different combinations of performance and objective criteria. Three cases involve increasing the heat exchanger effectiveness while constraining either the internal flow head loss, the internal mass flow rate, or their product. The other case involves reducing the required heat exchanger flow length while constraining the heat transfer rate. Familiar convection correlations are then incorporated into the enhancement analysis to predict general trends and behavior when the main tube is split into several smaller tubes. Analytical estimates of improved effectiveness are presented for three operating conditions of an actual heat exchanger which possesses a manifold. Experimental data acquired from the gas-to-gas heat exchanger are compared to numerical predictions of its performance without a manifold (baseline design). The analytical equations developed closely predict the improvement in heat exchanger effectiveness.
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Kumar, Dr Asheesh. "Design and Simulation of Counter Flow Heat Exchanger with Fins and Internal Ribs." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 3221–27. http://dx.doi.org/10.22214/ijraset.2021.35681.

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A Heat Exchanger is a device to transfer heat from fluid at higher temperature to fluid at lower temperature with highest efficiency. Designed for various applications such as preheating the water before sending it into boiler for generation of steam. This work is carried out with the primary objective of increasing the thermal efficiency of the procedure heat transfer process. There are different types of heat exchangers from which shell and tube heat exchanger is considered for this present work. High temperature water passes through the copper tubes and low temperature water flows outside the copper tubes. To enhance the rate of heat, transfer the modified design is implemented. The design consists of fins outside the copper tubes to increase the surface area in contact with outside fluid. Also, ribs are provided inside the copper tubes for increasing the turbulence along with more area of contact. This paper mainly deals with design, modelling and CFD analysis of the heat exchanger. Overall heat transfer coefficient of the fins and internal ribs of heat exchanger is based on the results of effectiveness-NTU approach and LMTD approach. Modelling of various components are presented with the help of standard modelling software, solid works. Simulation of the process is done using ANSYS. The simulated results obtained in the software are compared with the published experimental results which are very close to our modified design heat exchanger and it is found that the results are very close to experimental results.
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Vorontsova, Valeriya Leonidovna, Alfiya Gizzetdinovna Bagoutdinova, and Almaz Fernandovich Gilemzianov. "Mathematical Models of the Ocurved Spring Tubes Surfaces." Journal of Computational and Theoretical Nanoscience 16, no. 11 (November 1, 2019): 4554–59. http://dx.doi.org/10.1166/jctn.2019.8353.

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One of the ways to intensify heat exchange processes is the creation of compact heat exchangers with a developed heat exchange surface. It is known that coil-type channels provide a developed heat exchange surface and belong to one of the most efficient and technological designs of heat exchange elements. In this regard, the authors proposed a small-size heat exchanger of the “pipe in pipe” type with an internal coil spring-twisted channel, and the authors of the proposed article developed mathematical models describing the heat-exchange surfaces of pipes of complex configurations, including coil spring-coiled channels. The equations of heat transfer surfaces are written in vector-parametric form based on the fundamental principles of analytical and differential geometry. In order to verify the adequacy and visualization of the written equations, surfaces were constructed using the Matlab application software package. The proposed mathematical models can be used in computer simulation of hydrodynamic processes during the flow of liquid media in curved channels, which will allow to explore and further optimize their internal geometry by changing the parameters of the equations. This work is a continuation of research on the creation of efficient heat exchangers.
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Soroka, B., and V. Zgurskyi. "Comprehensive analysis of transfer processes in modern high-temperature heat exchangers." Thermophysics and Thermal Power Engineering 41, no. 3 (October 23, 2019): 26–32. http://dx.doi.org/10.31472/ttpe.3.2019.4.

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The CFD modeling of high-temperature tube heat exchanger has been carried out. The results of numerical analysis of internal and external secondary emitters’ (SEE) influence upon intensity and uniformity of resulting heat transfer have been presented and discussed. An internal SEE have the determining impact upon heat exchange process thus enhancing the resulting heat flux till extra 40%.
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Seybold, Lothar, William Hill, and Jean-Jacques Robin. "Internal Heat Exchanger System Integration for R1234yf Refrigerant." SAE International Journal of Materials and Manufacturing 4, no. 1 (April 12, 2011): 181–94. http://dx.doi.org/10.4271/2011-01-0128.

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Rajalakshmi, K. "Control Of Heat Exchanger Using Internal Model Controller." IOSR Journal of Engineering 03, no. 7 (July 2013): 09–15. http://dx.doi.org/10.9790/3021-03710915.

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Kocheril, Rajesh, and Jacob Elias. "CFD simulation for evaluation of optimum heat transfer rate in a heat exchanger of an internal combustion engine." International Journal for Simulation and Multidisciplinary Design Optimization 11 (2020): 6. http://dx.doi.org/10.1051/smdo/2019017.

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Heat exchanger is an essential component of an engine cooling system. Radiators are compact heat exchangers used to transfer the heat absorbed from engine to the cooling media. The jacket cooling water gets cooled and re-circulated into system after exchanging the heat with cooling water in a heat exchanger. Conventional fluids like water, oil, ethylene glycol, etc. possess less heat transfer performance; therefore, it is essential to have a compact and effective heat transfer system to obtain the required heat transfer. A reduction in energy consumption is possible by improving the performance of heat exchanging systems and incorporating various heat transfer enhancement techniques. In this paper, the heat transfer rate using nano-sized ferrofluid with and without magnetization is analysed using CFD simulation and compared with the experimental values obtained from a heat exchanger using water as base fluid. The heat transfer rate is measured using different combinations by varying the percentage of nano particles and by introduction of different magnetic intensity (gauss) on to the ferrofluid. The optimum heat transfer rate and efficiency of heat exchanger is calculated with the different combinations and the values are compared with the values of CFD simulation. CFD simulation was undertaken for water alone as cooling media and for water with ferro particle addition from 2% to 5%. The difference in temperature observed to be similar with experimental values. The deviation is within the acceptable limit and therefore the experimental findings are validated. The experiment was conducted on a parallel flow heat exchanger with water alone as cooling media, water with varying percentage of ferro fluid and water with varying magnetic intensity on ferrofluid. Percentage of ferro particles added up to where the optimum temperature difference could be obtained and the magnetic intensity also varied up to the optimum value.
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Dissertations / Theses on the topic "Internal heat exchanger"

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Goodman, Christopher L. "Modeling, validation and design of integrated carbon dioxide heat pumps and water heaters." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22560.

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Athavale, Jayati Deepak. "Evaluation of Internal Fin Geometry for Heat Transfer Enhancement in Automobile Exhaust Energy Harvesting Systems." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/54017.

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Thermoelectric generators (TEGs) are currently being explored for their potential in harvesting energy from automobile exhaust. TEGs in form of an appropriate TEG- Heat exchanger module can utilize the temperature difference between the hot exhaust gases and the automobile coolant and convert it into electrical voltage. The amount of power is anticipated to be a few hundred watts depending on the temperature gradient and the material of the TEGs. The focus of this study is increasing the hot side heat transfer for improved performance of the thermoelectric generators using two different internal fins — louvered fins and herringbone wavy fins. The multi-louvered fins basically have 'multi flat plate' behavior and will enhance the heat transfer by deflecting the air from its original path and aligning it with the plane of the louvers. Herringbone fins are used to lengthen the path of airflow allowing for greater residence time and better mixing of the flow. They also provide for greater wetted surface area achieving higher heat transfer. The flow and heat transfer behavior inside the exhaust pipe test section with internal fins is modeled using commercial numerical software. The thermal and flow behavior through both these internal fins depends to a large extent on geometric parameters and fin arrangement. Optimization of the fin design is considered to determine the configuration that provides highest heat transfer while providing least pressure drop across the pipe length. The heat transfer and pressure drop characteristics are compared to the baseline flow without any fin enhancement.
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Aliev, Ruslan. "CFD Investigation of Heat Exchangers with Circular and Elliptic Cross-Sectional Channels." Cleveland State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=csu1452678890.

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Tambovtsev, Alexander. "Energieeinsparung in Kälteanlagen durch Kombination von thermostatischem Expansionsventil und innerem Wärmeübertrager." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1218482331656-43301.

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Die Erfindung der Kältemaschine macht es möglich, dass heute zu beliebiger Zeit Kälte in benötigter Menge und gewünschter Temperatur erzeugt werden kann. Aber für die Kälteerzeugung braucht man Antriebsenergie. Das Ziel dieser Doktorarbeit besteht darin, mit einer intelligenten Kombination von thermostatischem Expansionsventil (TEV) und innerem Wärmeübertrager (IWÜ) den Energieverbrauch von Kälteanlagen deutlich zu verringern, ohne dass dies zu einer Verschlechterung der Zuverlässigkeit oder wesentlichen Mehrkosten führt. Bis heute gelten die beiden bekannten Komponenten TEV und IWÜ als inkompatibel miteinander, weil die einfache Aneinanderreihung zu einem instabilen Regelverhalten führt. Nach detaillierter Analyse der Ursachen dieser Instabilität wird die Hypothese aufgestellt, dass durch eine absichtliche „Verschlechterung“ des IWÜ ein stabiler Arbeitsbereich gefunden werden kann. Bei dieser „Verschlechterung“ kann es sich z. B. um den Bypass eines Teils des Hochdruckstromes oder um eine Gleichstromanordnung der Ströme im Wärmeübertrager handeln. Diese Hypothese wurde primär durch Experimente, aber zusätzlich auch durch Simulationsrechnungen bestätigt. Dafür wurde ein Versuchsstand aufgebaut, mit welchem verschiedene Konfigurationen und Regelstrategien getestet wurden. Es wurde eine deutliche Verringerung des Energieverbrauchs gegenüber herkömmlichen Anordnungen erreicht.
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Veselská, Monika. "Provoz a řízení sprchových rekuperačních výmeníků." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227293.

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This thesis deals with the operation and management of shower recuperative heat exchangers, energy recovery from them and further use of this energy. This work is divided into four parts. The first presents the possibilities of using energy from wastewater. The second part deals with the design possibilities of energy recovery from waste water in the building, design water and sewer . The third part is devoted to the specification of the shower regenerative heat exchanger, its operation, regulation and control, culminating in economic evaluation of the proposed exchanger. The last part is a technical report and annexes drawings of the project.
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Tambovtsev, Alexander. "Energieeinsparung in Kälteanlagen durch Kombination von thermostatischem Expansionsventil und innerem Wärmeübertrager." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A23656.

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Die Erfindung der Kältemaschine macht es möglich, dass heute zu beliebiger Zeit Kälte in benötigter Menge und gewünschter Temperatur erzeugt werden kann. Aber für die Kälteerzeugung braucht man Antriebsenergie. Das Ziel dieser Doktorarbeit besteht darin, mit einer intelligenten Kombination von thermostatischem Expansionsventil (TEV) und innerem Wärmeübertrager (IWÜ) den Energieverbrauch von Kälteanlagen deutlich zu verringern, ohne dass dies zu einer Verschlechterung der Zuverlässigkeit oder wesentlichen Mehrkosten führt. Bis heute gelten die beiden bekannten Komponenten TEV und IWÜ als inkompatibel miteinander, weil die einfache Aneinanderreihung zu einem instabilen Regelverhalten führt. Nach detaillierter Analyse der Ursachen dieser Instabilität wird die Hypothese aufgestellt, dass durch eine absichtliche „Verschlechterung“ des IWÜ ein stabiler Arbeitsbereich gefunden werden kann. Bei dieser „Verschlechterung“ kann es sich z. B. um den Bypass eines Teils des Hochdruckstromes oder um eine Gleichstromanordnung der Ströme im Wärmeübertrager handeln. Diese Hypothese wurde primär durch Experimente, aber zusätzlich auch durch Simulationsrechnungen bestätigt. Dafür wurde ein Versuchsstand aufgebaut, mit welchem verschiedene Konfigurationen und Regelstrategien getestet wurden. Es wurde eine deutliche Verringerung des Energieverbrauchs gegenüber herkömmlichen Anordnungen erreicht.
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Nattes, Pierre-Henri. "Optimisation d'un cycle au CO2 dans le domaine du transport frigorifique." Thesis, Paris, CNAM, 2018. http://www.theses.fr/2018CNAM1190.

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L’objectif de cette étude est d’optimiser un cycle frigorifique au CO2 pour une application dans le transport frigorifique. Les performances de l’unité doivent être supérieures à celles d’une machine avec une injection de vapeur et un compresseur bi-étagé déjà commercialisé. Suite à l’étude de plusieurs solutions, un éjecteur couplé à un échangeur interne semble la solution la plus intéressante.Un banc expérimental est créé à partir de l’unité possédant une injection de vapeur. L’éjecteur est muni d’une aiguille pour pouvoir assurer une recherche de la haute pression optimale. L’échangeur interne est équipé d’un by-pass pour modifier la puissance échangée. Un ensemble de points d’essais est testé avec deux températures d’évaporation : 0 °C et -20 °C, et trois températures de source chaude : 30 °C, 38 °C et 50 °C.L’éjecteur avec aiguille est capable de s’adapter à différentes températures extérieures en modifiant la haute pression. L’échangeur interne permet d’augmenter les performances du cycle mais présente une limite, la température au compresseur devient élevée et présente un risque de détérioration de ses performances ou de l’huile.Avec le cycle présentant un éjecteur, une amélioration du coefficient de performance est observée pour les points avec une température d’évaporation de 0 °C mais celle-ci chute drastiquement pour les températures d’évaporation de -20 °C. Une analyse exergétique du cycle confirme les faibles performances de celui-ci pour des températures d’évaporation négatives.À partir des résultats expérimentaux, des modèles numériques sont mis en place. Les échangeurs, vannes de détente sont modélisés de manière conventionnelle. Pour le compresseur, le modèle de Winandy est modifié afin de fonctionner pour un compresseur bi-étagé avec injection de vapeur. L’éjecteur est modélisé à travers un modèle unidimensionnel basé sur des transformations simplifiées décrites à travers des rendements isentropiques. Tous les modèles sont validés mais ceux des échangeurs ont un temps de calcul CPU trop important pour pouvoir être utilisés sur une modélisation dynamique
The aim of this study is to optimize a CO2 cooling cycle for transport application. The efficiency of the unit needs to be superior that of a cycle with vapor injection and a two stages compressor. The solution proposed is to install an ejector with an internal heat exchanger.A test bench is created from a pre-existing unit. Tests are made for two evaporation temperatures: 0 °C and -20 °C and three external temperatures: 30 °C, 38 °C and 50 °C. The ejector is equipped with a needle to seek the optimal high pressure. The internal exchanger is equipped with a by-pass to modify the thermal power exchanged.The ejector with needle can change the high pressure to seek the optimal conditions. The internal heat exchanger increases the efficiency of the cycle but the rising of temperature at the compressor can degrade its efficiencies or the oil. The new cycle increases the COP for evaporation temperature of 0 °C but the COP is lower than without ejector for evaporation temperature of -20 °C. An exergetic analysis shows that indeed the cycle is less efficient for low evaporation temperature.From the experimental results, numerical models are created to realize a system simulation and to test different scenarii to drive the unit. Exchangers and valves modeled with conventional tools. Wynandy’s model is adapted to be used on a two-stage compressor with vapor injection. The ejector is modeled with a one-dimensional model, based on simplified transformations described with isentropic efficiencies. All models seem to work but the CPU time is too high to use the exchanger models for dynamic simulation
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Buřič, Jan. "Vnitřní prostředí a výplně otvorů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239950.

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The aim this diploma thesis is the design of heating and hot water in the building of a primary school in Trhové Sviny. The first part dealt with the issue of indoor environment and windows. The second part deals with a separate proposal heating and hot water in primary school. As a heat source was designed gas boiler, the second variant hot transfer station. The third part consists of technical reports and drawings of the specified object. The fourth part deals with the assessment of surface condensation on the surface of the window panes.
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Isafiade, Adeniyi Jide. "Interval based MINLP superstructure synthesis of heat and mass exchange networks." Doctoral thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5315.

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This study presents a new technique for synthesizing heat and mass exchange networks. The method involves generating superstructures using the temperature/composition interval concept from the physical insight approach. The superstructures are partitioned into temperature/composition intervals using the supply and target temperatures/compositions of either the hot/rich or cold/lean set of streams. The opposite kind of streams are made to participate (float) in all the intervals defined. Their ability to exchange heat/mass in these intervals is however subject to thermodynamic feasibility. The resulting superstructure is optimised as a mixed integer non linear programming (MINLP) model. The superstructure is hot/rich streams based if hot/rich streams are used to define the intervals otherwise it is cold/lean stream based.
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Nagavarapu, Ananda Krishna. "Binary fluid heat and mass exchange at the microscale in internal and external ammonia-water absorption." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45777.

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Absorption space-conditioning systems are environmentally benign alternatives to vapor compression systems and have the capability of being driven by waste heat. However, a lack of practically feasible and economically viable compact heat and mass exchangers is a major limitation in the success of this technology. The viability of the absorption cycle depends upon the performance of the absorber, which experiences large heat and mass transfer resistances due to adverse temperature and concentration gradients during the phase change of the binary mixture working fluid, resulting in large overall component sizes. Understanding of the coupled heat and mass transfer during binary fluid mixture absorption at the microscales is critical for the miniaturization of these components, which will enable broad implementation of this technology. The proposed study aims to achieve this by investigating ammonia-water absorption for two distinct flow configurations: external falling films and internal convective flows. For the falling-film absorption case, ammonia-water solution flows around an array of small diameter coolant tubes while absorbing vapor. This absorber is installed in a test facility comprising all components of a single-effect absorption chiller to provide realistic operating conditions at the absorber. Local temperature, pressure, and flow measurements will be taken over a wide range of operating conditions and analyzed to develop a heat and mass transfer model for falling-film ammonia-water absorption. A microscale convective flow absorber will also be investigated. This absorber consists of an array of parallel, aligned alternating shims with integral microscale features, enclosed between cover plates. These microscale features facilitate flow of various fluid streams and the associated heat and mass transfer. The use of microchannels induces high heat and mass transfer rates without any active or passive surface enhancement. The microscale absorber for small-scale applications will be evaluated over a wide range of operating conditions on a single-effect absorption heat pump breadboard test facility. The study will conclude with a comparison of the two flow configurations for absorption, with recommendations for their application in future miniaturization efforts
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Books on the topic "Internal heat exchanger"

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Meeting, American Society of Mechanical Engineers Winter. Fluid flow and heat transfer in reciprocating machinery: Presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Boston, Massachusetts, December 13-18, 1987. New York, N.Y. (345 E. 47th St., New York 10017): The Society, 1987.

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Saouli, S. Analysis of a salt gradient solar panel with an internal heat exchanger. 1987.

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A, Silk Eric, Domanski Piotr, and National Institute of Standards and Technology (U.S.), eds. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A, Silk Eric, Domanski Piotr, and National Institute of Standards and Technology (U.S.), eds. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A, Silk Eric, Domański Piotr, and National Institute of Standards and Technology (U.S.), eds. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A, Silk Eric, Domanski Piotr, and National Institute of Standards and Technology (U.S.), eds. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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A, Silk Eric, Domański Piotr, and National Institute of Standards and Technology (U.S.), eds. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.

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Book chapters on the topic "Internal heat exchanger"

1

Nandan, Gopal, Nafees Alam Wani, and Satish Kumar. "Augmentation of Thermal Performances in a Tubular Heat Exchanger Using Internal Flow Baffler: Recent Study." In Lecture Notes in Mechanical Engineering, 489–97. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4018-3_46.

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Gu, Junjie, Shujun Wang, and Zhongxue Gan. "Two-Phase Flow in Internal Heat Exchangers." In Two-Phase Flow in Refrigeration Systems, 111–30. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8323-6_8.

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Nadykto, Alexei B., and Evgenii R. Shchukin. "Vaporization and Growth of Aerosol Particles, Given Internal Heat Release and Radiant Heat Exchange." In Mathematical Models of Non-Linear Excitations, Transfer, Dynamics, and Control in Condensed Systems and Other Media, 325–38. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4799-0_27.

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Wen, Yalan, Ling Wang, Weiqing Peng, Muhammad Ilyas Menhas, and Lin Qian. "Application of Intelligent Virtual Reference Feedback Tuning to Temperature Control in a Heat Exchanger." In Intelligent Computing and Internet of Things, 311–20. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2384-3_29.

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VAN DEN BERG, W. H., and H. L. M. BAKKER. "EDDY CURRENT INSPECTION OF THE INTERNAL BORE OF FERROMAGNETIC HEAT-EXCHANGER TUBING." In Non-Destructive Testing, 315–20. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-444-87450-4.50077-1.

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Greco, Adriana, Ciro Aprea, and Angelo Maiorino. "Transcritical Carbon Dioxide Refrigeration as an Alternative to Subcritical Plants." In Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies, 295–359. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8398-3.ch008.

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Carbon dioxide (R744) is as a valid alternative to classical substances such as HFCs used in vapour compression plants. A transcritical refrigeration cycle is needed because the critical temperature of carbon dioxide is usually lower than the ambient temperature. In this chapter the performances of a transcritical cycle have been evaluated with a prototype R744 system working as a classical spit-systems to cool air. An experimental analysis has been carried out on the effect of: refrigerant charge, internal heat exchanger, heat rejection pressure on the energetic performances of the transcritical plant. An experimental analysis of a hybrid trans-critical refrigerator-desiccant wheel system has been carried out in order to improve the COP. The experimental transcritical cycle has been examined in comparison with a classical vapour compression plant working with the R134a.
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Mink, G., L. Horváth, E. G. Evseev, and A. I. Kudish. "Performance and Analysis of a Multiple-Effect Solar Still Utilizing an Internal Multi-Tubular Heat Exchanger for Thermal Energy Recycle." In 1999 ISES Solar World Congress, 226–35. Elsevier, 2000. http://dx.doi.org/10.1016/b978-008043895-5/50208-3.

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"Elsevier Science Internet Homepage." In Compact Heat Exchangers, ii. Elsevier, 2001. http://dx.doi.org/10.1016/b978-0-08-042839-0.50016-1.

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Hull, J. R., A. B. Scranton, and K. E. Kasza. "SOLAR POND HEAT REMOVAL USING A SUBMERGED HEAT EXCHANGER." In Intersol Eighty Five, 1505–9. Elsevier, 1986. http://dx.doi.org/10.1016/b978-0-08-033177-5.50287-8.

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"Compressors, Exhaust Turbines, Heat Exchangers." In Internal Combustion Engine in Theory and Practice. The MIT Press, 1985. http://dx.doi.org/10.7551/mitpress/3850.003.0010.

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Conference papers on the topic "Internal heat exchanger"

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Nguyen, Tronghieu, Thanhtrung Dang, and Kimhang Vo. "Experimental Comparisons on Heat Transfer Characteristics of CO2 Air Conditioning System with an Internal Heat Exchanger and without an Internal Heat Exchanger Using Minichannel Evaporator." In 2019 International Conference on System Science and Engineering (ICSSE). IEEE, 2019. http://dx.doi.org/10.1109/icsse.2019.8823453.

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Rajalakshmi, K., and V. Mangaiyarkarasi. "Design of internal model controller for a heat exchanger system." In 2013 International Conference on Information Communication and Embedded Systems (ICICES 2013). IEEE, 2013. http://dx.doi.org/10.1109/icices.2013.6508237.

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Bahrami, Salman, Hasan Mohammad Beigi, and Mohammad Hosein Sabour. "Experimental Analysis of Internal Heat Exchanger for Automotive A/C System." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24485.

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In this paper, a new designed internal heat exchanger (suction-liquid line heat exchanger) for R134a automotive air conditioning system is proposed, and is studied experimentally. The approval is done by calorimeter test apparatus, which provides conditions close to real automotive A/C system operation. In this design, the high-pressure liquid passes through central channel and the low-pressure vapor flows in several parallel channels in the opposite direction. The results show that in all conditions, internal heat exchanger adoption will increase the condenser real capacity. Therefore, smaller condensers can be used to reach the same capacities. Using the designed internal heat exchanger will decrease the needed mass flow rate. In a constant mass flow rate, internal heat exchanger adoption will increase evaporator capacity. In all concluded tests, the compressor power consumption was decreasing by internal heat exchanger adoption; it was intensifying at higher air temperature passing through the condenser. Using this internal heat exchanger will decrease compressor power consumption up to 6%, and will increase mostly the coefficient of performance. The condenser higher air temperature will increase the coefficient of performance and its improvement with internal heat exchanger. In this case the coefficient of performance can increase up to 8.4%, and will enhance subcooled degree at expansion valve inlet up to 12.8°C.
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Ezekoye, L. Ike, and Colin Arnold. "Estimating ASME Section III and VIII Heat Exchanger Nozzle Loads." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77829.

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Heat Exchange Institute (HEI) Standards for Power Plant Heat Exchangers, 4th Edition provides guidance on how to estimate the nozzle loads of cylindrical shells. The procedure covered in one of the appendices of the document relies on WRC Bulletin 107 methodology which uses internal pressure, physical geometry and material properties to estimate external forces and moments. The forces and moments are the limiting loads when the heat exchanger material is taken to yield. The material yield defines the range of possible load combinations that will meet the design criteria. However, for operability, the design criteria sometimes may differ from the yield but usually is based on heat exchanger supplier experience. This paper provides a way to estimate heat exchanger nozzle loads that more closely reflect operating conditions that take into account supplier experience. In this paper, generalized load formulae are developed for the nozzles. The formulae are iteratively solved to meet the stress criteria based on supplier experience. The resultant loads are evaluated using WRC Bulletin 107 to ensure that the loads are bounded by the acceptance criteria. Unbounded loads are rejected and reiterated until the loads are acceptable.
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Kang, Dae Hoon, Jae Ho Lee, Sun-Ik Na, and Min Soo Kim. "INVESTIGATION OF THE PERFORMANCE OF STEAM GENERATION HEAT PUMP SYSTEM WITH INTERNAL HEAT EXCHANGER." In International Heat Transfer Conference 16. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihtc16.rac.023955.

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Seybold, Lothar, William Hill, and Christian Zimmer. "Internal Heat Exchanger Design Performance Criteria for R134a and HFO-1234yf." In SAE 2010 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1210.

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Dong, Wei, Shengbao Zhang, Zhiqiang Guo, and Xiao Yu. "Experimental Investigation on the Flow and Heat Transfer of an Air-Air Primary Surface Heat Exchanger." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75991.

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The primary surface heat exchanger (PSHE) is a kind of small size, light weight, high integration heat exchanger. The characteristics of the complex internal structure, complex flow pattern and the flow interaction have a great influence on the heat transfer of the air-air primary surface heat exchanger. Five cross-corrugated air-air primary surface heat exchangers with different core configurations are designed and fabricated applying additive manufacturing technology. The cross angle θ of upper and lower corrugated plates is 0°, 15°, 30°, 45°, respectively. An experimental investigation on the flow and heat transfer performance is carried out. The comparison of test results of overall heat transfer coefficient and the pressure drop for different primary heat exchangers is presented. The test results show that the pressure drop is significantly increased with the cross angle increasing, and the heat transfer performance does not show the linear increasing with the cross angle increasing.
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Mathew, B., T. J. John, and H. Hegab. "Effectiveness of Counter Flow Microchannel Heat Exchangers Subjected to External Heat Transfer and Internal Heat Generation." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88167.

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The effect of external heat transfer and internal heat generation on the thermal performance of a balanced counter flow microchannel heat exchanger is theoretically analyzed in this paper. External heat transfer occurs due to the thermal interaction between ambient and the fluids. Internal heat generation takes into account the heat generated inside the channels due to the conversion of pumping power into heat. One-dimensional governing equations for both fluids were developed and solved to obtain the axial temperatures. The governing equations were solved using a 2nd order finite difference scheme. The effectiveness of the fluids is dependent on NTU, the ambient temperature, the thermal resistance between the individual fluids and the ambient and the pumping power. With increase in ambient temperature the effectiveness of the hot and cold fluid decreased and improved, respectively. On the other hand, reductions in the ambient temperature always lead to the improvement and degradation of the hot and cold fluid effectiveness, respectively. Depending on the ambient temperature, the thermal resistance between the individual fluids and the ambient increased or decreased the effectiveness of the fluids. Internal heat generation always reduced and improved the hot and cold fluid effectiveness, respectively. The combined effect of external heat transfer and internal heat generation on the effectiveness of the fluids depends on the net amount of heat gained/lost by the individual fluids. The effectiveness of a microchannel counter flow heat exchanger is found to be better than of a parallel flow heat exchanger subjected to the same set of external conditions. The model developed in this paper has been verified using existing models that consider each of these effects individually.
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Abbasi, K., M. Del Valle, A. P. Wemhoff, and A. Ortega. "A Transient Model for Parallel Flow and Counter Flow Heat Exchangers." In ASME 2013 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ipack2013-73118.

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The transient and steady-state response of single pass constant-flow (concentric parallel flow, concentric counter flow) heat exchangers was investigated using a finite volume method. Heat exchanger transients initiated by both step-change and sinusoidally varying hot stream inlet temperatures were investigated. The wall separating the fluid streams was modeled by conduction with thermal mass; hence the heat exchanger transient behavior is dependent on the thermal mass of the fluid streams as well as the internal wall. The outer wall is approximated as fully insulating. The time dependent temperature profiles were investigated as a function of heat exchanger dimensionless length and dimensionless time for both fluids. It was found that the transient response of the heat exchanger is controlled by a combination of the residence time and thermal capacitance of the fluid streams, the overall heat transfer coefficient between the fluid streams, and the thermal capacitance of the internal wall.
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Li, Yonghui, Minghui Chen, and Rizhu Li. "Heat Transfer Experiments and Analyses on Double-Tube Bundle Heat Exchanger." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29228.

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Experiments were performed on the double-tube bundle heat exchanger. The hot side of the heat exchanger consists of parallel flow channels of the inner tubes and the space between the shell and the double-tube bundle, and the cold side is the narrow annular flow channels between the inner and outer tubes. The test fluid in both hot and cold sides is de-ionized water. The heat-transfer coefficients were obtained from the experiment in the range of Reynolds number from 2000 to 38000. The detached coefficients method was used in the absence of direct measurement of the tube temperature. It is found that the ranges of laminar flow in both internal and external flow passages are wider than regular circular tube. The heat transfer coefficient of internal side is lower than those from Dittus-Boelter formula, while the heat transfer coefficient of external side in this experiment is higher than that for the corrugated pipe. The heat transfer coefficient of the narrow annular channel is significantly determined by its structure.
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Reports on the topic "Internal heat exchanger"

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Payne, W. Vance II, Eric A. Silk, and Piotr A. Domanski. A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger. Gaithersburg, MD: National Institute of Standards and Technology, 2000. http://dx.doi.org/10.6028/nist.ir.6449.

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Clausen, Jay, Michael Musty, Anna Wagner, Susan Frankenstein, and Jason Dorvee. Modeling of a multi-month thermal IR study. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41060.

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Inconsistent and unacceptable probability of detection (PD) and false alarm rates (FAR) due to varying environmental conditions hamper buried object detection. A 4-month study evaluated the environmental parameters impacting standoff thermal infra-red(IR) detection of buried objects. Field observations were integrated into a model depicting the temporal and spatial thermal changes through a 1-week period utilizing a 15-minute time-step interval. The model illustrates the surface thermal observations obtained with a thermal IR camera contemporaneously with a 3-d presentation of subsurface soil temperatures obtained with 156 buried thermocouples. Precipitation events and subsequent soil moisture responses synchronized to the temperature data are also included in the model simulation. The simulation shows the temperature response of buried objects due to changes in incoming solar radiation, air/surface soil temperature changes, latent heat exchange between the objects and surrounding soil, and impacts due to precipitation/changes in soil moisture. Differences are noted between the thermal response of plastic and metal objects as well as depth of burial below the ground surface. Nearly identical environmental conditions on different days did not always elicit the same spatial thermal response.
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Development of a coal-fueled Internal Manifold Heat Exchanger (IMHEX reg sign ) molten carbonate fuel cell. Office of Scientific and Technical Information (OSTI), September 1991. http://dx.doi.org/10.2172/7054595.

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Development of a coal-fueled Internal Manifold Heat Exchanger (IMHEX{reg_sign}) molten carbonate fuel cell. Volumes 1--6, Final report. Office of Scientific and Technical Information (OSTI), September 1991. http://dx.doi.org/10.2172/10169989.

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