Relevant bibliographies by topics / Cross-flow heat exchangers

Academic literature on the topic 'Cross-flow heat exchangers'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Cross-flow heat exchangers"

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Alotaibi, Sorour, Mihir Sen, Bill Goodwine, and K. T. Yang. "Controllability of cross-flow heat exchangers." International Journal of Heat and Mass Transfer 47, no. 5 (February 2004): 913–24. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2003.08.021.

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Silaipillayarputhur, Karthik. "Transient Response of Cross Flow Heat Exchangers Subjected to Simultaneous Temperature and Flow Perturbations." Applied Mechanics and Materials 799-800 (October 2015): 665–70. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.665.

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This paper compares the transient thermal performance between counter and parallel cross flow heat exchangers subjected to time varying inlet mass flow rates and inlet temperatures that hasn’t been previously discussed in the available literature. Specifically the transient performance of 2 pass and 3 pass cross flow heat exchangers is discussed in this paper. In the present study the energy balance equations for the hot and cold fluids and the heat exchanger wall were solved using an implicit central finite difference method. Representative values of NTU were considered, and the NTU’s of the heat exchanger were assumed to be uniformly distributed among the heat exchanger passes. Other physically significant parameters such as the capacity rate ratio and the convection heat transfer resistance ratio were systematically varied. A detailed summary based on the observations has been presented.
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Bury, Tomasz, Jan Składzień, and Katarzyna Widziewicz. "Experimental and numerical analyses of finned cross flow heat exchangers efficiency under non-uniform gas inlet flow conditions." Archives of Thermodynamics 31, no. 4 (October 1, 2010): 133–44. http://dx.doi.org/10.2478/v10173-010-0034-5.

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Experimental and numerical analyses of finned cross flow heat exchangers efficiency under non-uniform gas inlet flow conditionsThe work deals with experimental and numerical thermodynamic analyses of cross-flow finned tube heat exchangers of the gas-liquid type. The aim of the work is to determine an impact of the gas non-uniform inlet on the heat exchangers performance. The measurements have been carried out on a special testing rig and own numerical code has been used for numerical simulations. Analysis of the experimental and numerical results has shown that the range of the non-uniform air inlet to the considered heat exchangers may be significant and it can significantly affect the heat exchanger efficiency.
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Saboya, F. E. M., and C. E. S. M. da Costa. "Minimum Irreversibility Criteria for Heat Exchanger Configurations." Journal of Energy Resources Technology 121, no. 4 (December 1, 1999): 241–46. http://dx.doi.org/10.1115/1.2795989.

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From the second law of thermodynamics, the concepts of irreversibility, entropy generation, and availability are applied to counterflow, parallel-flow, and cross-flow heat exchangers. In the case of the Cross-flow configuration, there are four types of heat exchangers: I) both fluids unmixed, 2) both fluids mixed, 3) fluid of maximum heat capacity rate mixed and the other unmixed, 4) fluid of minimum heat capacity rate mixed and the other unmixed. In the analysis, the heat exchangers are assumed to have a negligible pressure drop irreversibility. The Counterflow heat exchanger is compared with the other five heat exchanger types and the comparison will indicate which one has the minimum irreversibility rate. In this comparison, only the exit temperatures and the heat transfer rates of the heat exchangers are different. The other conditions (inlet temperatures, mass flow rates, number of transfer units) and the working fluids are the same in the heat exchangers.
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Yildirim, M., and M. S. Söylemez. "THERMOECONOMICAL OPTIMIZATION OF CROSS-FLOW HEAT EXCHANGERS." Heat Transfer Research 48, no. 12 (2017): 1069–75. http://dx.doi.org/10.1615/heattransres.2016006384.

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Oğulata, R. Tuğrul, Füsun Doba, and Tuncay Yilmaz. "Irreversibility analysis of cross flow heat exchangers." Energy Conversion and Management 41, no. 15 (October 2000): 1585–99. http://dx.doi.org/10.1016/s0196-8904(00)00020-0.

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Zaleski, Tadeusz. "Mathematical modelling of cross-flow heat exchangers." Chemical Engineering Science 42, no. 7 (1987): 1517–26. http://dx.doi.org/10.1016/0009-2509(87)80157-4.

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Syukran, Syukran. "Kaji efisiensi temperatur penukar panas dengan variasi aliran untuk aplikasi pengering." Jurnal POLIMESIN 16, no. 2 (August 30, 2018): 39. http://dx.doi.org/10.30811/jpl.v16i2.562.

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Abstrak Heat exchanger atau alat penukar panas adalah alat-alat yang digunakan untuk mengubah temperatur fluida atau mengubah fasa fluida dengan cara mempertukarkan panasnya dengan fluida lain. Pada sebuah penukar panas kemampuan mempertukarkan panas sangat ditentukan oleh tipe dan jenis aliran fluida yang melewati penukar panas. Secara garis besar penukar panas dibagi berdasarkan arah aliran fluidanya. Berdasarkan arah aliran fluida penukar panas dibedakan menjadi 3 (tiga) jenis aliran, yaitu aliran searah (parallel flow), aliran berlawanan (counter flow) dan aliran silang (cross flow). Saat ini penukar panas banyak dipakai dalam industri pengeringan produk-produk pertanian, perkebunan dan perikanan skala kecil dan menengah. Penggunaan penukar panas dalam bidang pengeringan saat ini sudah menjadi kebutuhan untuk mengatasi permasalahan produktifitas pengeringan. Umumnya penukar panas yang digunakan adalah tipe aliran berlawanan. Beberapa penelitian telah dilakukan untuk mengetahui efektifitas penukar panas tersebut yang umumnya berfokus pada jenis aliran berlawanan. Penelitian penelitian spesifik yang mengkaji perbandingan efisiensi penukar panas untuk ketiga jenis aliran belum ditemukan. Penelitian ini dilakukan untuk mengetahui efisiensi temperatur penukar panas untuk jenis aliran jenis aliran melintang, sejajar, dan berlawanan. Metode penelitian dilakukan fabrikasi 3 unit exchanger tipe gas-gas dengan dimensi 50 (P) x 10 (L) x 30 (T) dengan jumlah tube 17 susunan. Hasil penelitian menunjukkan bahwa efisiensi temperatur untuk ketiga jenis penukar panas tersebut adalah 21,3% aliran melintang, 17,3% aliran berlawanan dan 15,9% aliran sejajar. Hasil penelitian menyimpulkan bahwa efisiensi temperatur tertinggi diperoleh jenis penukar panas aliran melintang. Kata kunci : Penukar panas, aliran sejajar, aliran berlawanan, aliran silang, temperatur. Abstrack Heat exchangers or heat exchangers are the means used to change the temperature of the fluid or to change the fluid phase by exchanging heat with other fluids. In a heat exchanger the heat exchange ability is greatly determined by the type and type of fluid flow passing through the heat exchanger. Broadly speaking the exchanger is divided based on the direction of fluid flow. Based on the direction of fluid flow exchanger is divided into 3 (three) types of flow, namely parallel flow, counter flow and cross flow. Currently, heat exchangers are widely used in the drying industry of small and medium-sized agricultural and small-scale plantation and fishery products. The use of exchangers in the field of drying is now a need to overcome the problems of drying productivity. Generally the exchanger used is the opposite flow type (counter flow). Several studies have been conducted to determine the effectiveness of these exchangers which generally focus on the opposite type of flow. Specific research studies that reviewed the efficiency of exchangers for the three types of flow have not been found. This research was conducted to find out the efficiency of heat exchanger temperature for flow type of cross flow, parallel flow and counter flow type. The research method was fabricated 3 units of gas-gas exchanger type with dimension 50 (P) x 10 (L) x 30 (T) with the number of tubes 17 staggered arrangement. The results show that the temperature efficiency for the three types of heat exchanger is 21.3% cross flow flow, 17.3% flow counter flow and 15.9% parallel flow flow. The results concluded that the highest temperature efficiency obtained by cross flow flow type exchanger. Keywords: Heat exchanger, parallel flow, counter flow, cross flow, temperature
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Cabezas-Gómez, Luben, Hélio Aparecido Navarro, and José Maria Saiz-Jabardo. "Thermal Performance of Multipass Parallel and Counter-Cross-Flow Heat Exchangers." Journal of Heat Transfer 129, no. 3 (June 14, 2006): 282–90. http://dx.doi.org/10.1115/1.2430719.

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A thorough study of the thermal performance of multipass parallel cross-flow and counter-cross-flow heat exchangers has been carried out by applying a new numerical procedure. According to this procedure, the heat exchanger is discretized into small elements following the tube-side fluid circuits. Each element is itself a one-pass mixed-unmixed cross-flow heat exchanger. Simulated results have been validated through comparisons to results from analytical solutions for one- to four-pass, parallel cross-flow and counter-cross-flow arrangements. Very accurate results have been obtained over wide ranges of NTU (number of transfer units) and C* (heat capacity rate ratio) values. New effectiveness data for the aforementioned configurations and a higher number of tube passes is presented along with data for a complex flow configuration proposed elsewhere. The proposed procedure constitutes a useful research tool both for theoretical and experimental studies of cross-flow heat exchangers thermal performance.
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WU, S. Y., Y. R. LI, and D. L. ZENG. "EXERGO-ECONOMIC PERFORMANCE EVALUATION ON LOW TEMPERATURE HEAT EXCHANGER." International Journal of Modern Physics B 19, no. 01n03 (January 30, 2005): 517–19. http://dx.doi.org/10.1142/s0217979205028943.

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Based on the exergo-economic analysis of low temperature heat exchanger heat transfer and flow process, a new exergo-economic criterion which is defined as the net profit per unit heat flux for cryogenic exergy recovery low temperature heat exchangers is put forward. The application of criterion is illustrated by the evaluation of down-flow, counter-flow and cross-flow low temperature heat exchangers performance.
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Dissertations / Theses on the topic "Cross-flow heat exchangers"

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Li, Ming. "An experimental and theoretical study of fluidelastic instability in cross flow multi-span heat exchanger tube arrays /." *McMaster only, 1997.

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Tough, M. C. "A heat transfer model of forced convection, cross flow heat exchangers used in space heating." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259171.

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Halim, Mohammed Salim. "Detailed velocity measurements of flow through staggered and in-line tube banks in cross-flow using laser doppler anemometry." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235574.

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Cole, Brian D. "Transient performance of parallel-flow and cross-flow direct transfer type heat exchangers with a step temperature change on the minimum capacity rate fluid stream. /." Online version of thesis, 1995. http://hdl.handle.net/1850/11924.

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Ingold, Abram M. "Single-pass cross-flow micro-channel heat exchangers for use in organic Rankine cycles /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1402175291&sid=9&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Wipplinger, Karl Paul Martin. "Utilising a high pressure, cross flow, stainless steel fintube heat exchanger for direct steam generation from recovered waste heat." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50217.

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Thesis (MScEng) -- Stellenbosch University, 2004.
ENGLISH ABSTRACT: Around the world the implementation of heat recovery systems is playing an increasingly important role in the engineering inqustry. The recovered energy is utilised in the plants and saves companies millions in expenses per year. Not only is this seen on the grand scale of industry, but also in everyday life, where for instance turbochargers are used to boost the performance of automobiles by utilising the wasted energy expelled along with exhaust gasses. The aim of this project is to investigate a small scale waste heat recovery system, and to determine the optimum method by which to convert the recovered energy into electrical energy, which can be used as a secondary energy source. The research contained in this thesis, centres on the main components and theory needed for the construction of a small scale waste heat recovery system. Also included, is a theoretical analysis concerning the design and construction of the system, utilising researched theory and a simulation program of the recovery system. The simulation is control volume-based and generates property data on the fluid and exhaust gas throughout the heat exchanger. The final design included a finite element stress analysis of certain parts of the system to ensure safe testing at high pressures and temperatures. The final design resulted in a high pressure, cross flow, stainless steel fintube heat exchanger that, by using a continuous combustion unit as energy source and water as the working fluid, reached efficiencies of up to 74% in direct steam generation testing. The tube-side of the heat exchanger was designed to withstand pressures of up to 2MPa (20bar), which is imperative for the implementation of the next phase, where a turbocharger will be connected to the heat exchanger. The completion of this part of the project has paved the way for further development and implementation of the heat recovery system.
AFRIKAANSE OPSOMMING: Die herwinning van energie begin 'n toenemend belangrike rol in die ingenieurs industrie speel. Die herwonne energie word in fabrieke ben ut en spaar maatskappye milj oene aan uitgawes per jaar. Hierdie beginsel word nie net in die grootskaalse nywerhede toegepas nie, maar ook in die allerdaagse lewe, soos byvoorbeeld in voertuie waar turbo-aanjaers gebruik word om die energie-uitset van enjins te verhoog deur bloot gebruik te maak van die verlore energie wat saam met die uitlaatgasse in die atmosfeer gepomp word. Die doel van hierdie projek is om 'n kleinskaalse energieherwinningstelsel te ondersoek en die mees effektiewe metode te vind om die herwinde energie na elektriese energie om te skakel wat as 'n sekondere energiebron gebruik kan word. Die navorsing bevat in die tesis, kyk na al die hoofkomponente en teoretiese kennis wat nodig is vir die konstruksie van 'n kleinskaalse hitteherwinningstelsel. Ook ingesluit is 'n teoretiese analise ten opsigte van die ontwerp en konstruksie van die sisteem. Dit behels die gebruik van nagevorsde teorie saam met 'n simulasie program van die herwinnings stelsel. Die simulasie program is op kontrole volumes gebasseet en genereer uitlaatgas- en water eienskappe soos dit deur die hitteruiler vloei. Die finale ontwerp bevat 'n eindige element spannmgs analise van sekere kritiese komponente in die stelsel om die veilige gebruik van die sisteem by hoe drukke en temperature te verseker. Die finale ontwerp was 'n hoedruk, kruisvloei, vlekvrye staal finbuis hitteruiler. Deur 'n konstante verbrandingseenheid as energiebron te gebruik saam met water as werksvloeier, het die hitteruiler effektiwiteite van tot 74% in direkte stoomgenerasie-toetse bereik. Die hitteruiler is ontwerp om hoe drukke van tot 2MPa (20bar) te hanteer wat baie belangrik is vir die implementasie van die volgende fase van die projek waar 'n turbo-aanjaer aan die stelsel gekoppel sal. Die suksesvolle voltooiing van hierdie fase van die projek het die weg gebaan vir die verdere ontwikkeling en implimentasie van die energieherwinningsstelsel.
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Otava, Jiří. "Návrh vzduchotechnického zařízení s ohledem na systém zpětného získávání tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265724.

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This diploma thesis is focused on problems of heat exchangers. There are two main objectives. The first objective is based on long-term measuring of enthalpy heat exchanger, processing of measured data and comparison of result with manufacturer's results. The second objective is design of variant solutions for two types of heat exchanger of air conditioning unit of selected shop. For variant without moisture transportation was selected cross flow exchangers. Thanks to knowledge from long-term measurement, was selected enthalpy heat exchanger for variant with moisture transportation. Chosen variants were compared with emphasis on heat and moisture exchange efficiency with requirements on Ecodesign.
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Ng, Eton Yat-Tuen, and eton_ng@hotmail com. "Vehicle engine cooling systems: assessment and improvement of wind-tunnel based evaluation methods." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2002. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080422.100014.

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The high complexity of vehicle front-end design, arising from considerations of aerodynamics, safety and styling, causes the airflow velocity profile at the radiator face to be highly distorted, leading to potentially reduced airflow volume for heat dissipation. A flow visualisation study showed that the bumper bar significantly influenced the cooling airflow, leading to three-dimensional vortices in its wake and generating an area of relatively low velocity across at least one third of the radiator core. Since repeatability and accuracy of on-road testing are prejudiced by weather conditions, wind-tunnel testing is often preferred to solve cooling airflow problems. However, there are constraints that limit the accuracy of reproducing on-road cooling performance from wind-tunnel simulations. These constraints included inability to simulate atmospheric conditions, limited tunnel test section sizes (blockage effects) and lack of ground effect simulations. The work presented in this thesis involved use of on-road and wind-tunnel tests to investigate the effects of most common constraints present in wind tunnels on accuracy of the simulations of engine cooling performance and radiator airflow profiles. To aid this investigation, an experimental technique for quantifying radiator airflow velocity distribution and an analytical model for predicting the heat dissipation rate of a radiator were developed. A four-hole dynamic pressure probe (TFI Cobra probe) was also used to document flow fields in proximity to a section of radiator core in a wind tunnel in order to investigate the effect of airflow maldistribution on radiator heat-transfer performance. In order to cope with the inability to simulate ambient temperature, the technique of Specific Dissipation (SD) was used, which had previously been shown to overcome this problem.
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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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Albrecht, Daniel David. "DESIGN AND CONSTRUCTION OF HEAT EXCHANGER TEST STAND WITH INITIAL TEST RESULTS." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/109.

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Continual development of internal combustion engines requires greater performance from liquid coolants and heat exchangers to maintain optimal temperature. For the purpose of experimental testing of traditional, compact, and microchannel heat exchangers, a test facility has been designed, constructed, and utilized. The facility includes equipment and instrumentation necessary to create operating conditions and record data primarily for testing plate-fin brazed aluminum heat exchanger where heat is being transferred from liquid to air. Other arrangements of heat exchangers could be tested as well with some modifications. Initial tests were performed at several specified operating conditions for three liquids: water, a traditional glycol based Extended Life Coolant (ELC), and a new Glycol Free Coolant (GFC) in an attempt to characterize their heat transfer ability. Results of the tests found that the product of overall heat transfer coefficient and heat exchanger area (UA) was very similar for GFC and water, and it was less for ELC by a narrow margin of 1.3% difference on average. Uncertainty due to instrumentation accuracy was calculated to be 1.8% on average making the results overall UA unverifiable. Measured pressure drop across the heat exchanger which is proportional to required pumping power was found to be 13.5% higher for GFC than ELC at nominal conditions. The GFC offers similar heat transfer performance and marginally increased pumping power requirements compared to the traditional ELC. Due to similar heat transfer performance and the small effect of pressure drop, GFC would be good alternative to ELC due to its less toxic composition.
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Books on the topic "Cross-flow heat exchangers"

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Cabezas-Gómez, Luben, Hélio Aparecido Navarro, and José Maria Saíz-Jabardo. Thermal Performance Modeling of Cross-Flow Heat Exchangers. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-09671-1.

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Cabezas-Gómez, Luben, Hélio Aparecido Navarro, and José Maria Saíz-Jabardo. Thermal Performance Modeling of Cross-Flow Heat Exchangers. Springer, 2014.

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Bury, Tomasz. Impact of a Medium Flow Maldistribution on a Cross-Flow Heat Exchanger Performance. INTECH Open Access Publisher, 2012.

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Book chapters on the topic "Cross-flow heat exchangers"

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Spang, B., and W. Roetzel. "Approximate Equations for the Design of Cross- Flow Heat Exchangers." In Design and Operation of Heat Exchangers, 125–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84450-8_11.

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Marin, O., S. Petrescu, and N. Baran. "Numerical Analysis of Cross-Flow Heat Exchangers in Order to Establish a New Design Method." In Design and Operation of Heat Exchangers, 135–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84450-8_12.

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Taler, Dawid. "Developed Turbulent Fluid Flow in Ducts with a Circular Cross-Section." In Numerical Modelling and Experimental Testing of Heat Exchangers, 173–256. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91128-1_6.

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Taler, Dawid. "Mathematical Modelling of Tube Cross-Flow Heat Exchangers Operating in Steady-State Conditions." In Numerical Modelling and Experimental Testing of Heat Exchangers, 339–69. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91128-1_10.

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Hofmann, A., S. Wild, L. R. Oellrich, and K. Schubert. "Investigations on Cross Flow Micro Heat Exchangers for Operation with Lhe." In Advances in Cryogenic Engineering, 1639–46. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2522-6_201.

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Liu, Xuelai, Yong’an Li, Jizhi Li, Hongxing Yang, and Hengliang Chen. "Efficiency Analysis of Cross-Flow Plate Heat Exchanger for Indirect Evaporative Cooling." In Sustainability in Energy and Buildings, 255–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03454-1_26.

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Vishwanath, Kore Someshwar, and S. Balaguru. "Modeling of Flow-Induced Vibration Response of Heat Exchanger Tube with Fixed Supports in Cross Flow." In Lecture Notes in Mechanical Engineering, 621–35. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3631-1_59.

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Païdoussis, M. P., S. J. Price, and N. W. Mureithi. "Chaotic Oscillations of a Loosely Supported Tube in a Heat-Exchanger Array in Cross-Flow." In IUTAM Symposium on New Applications of Nonlinear and Chaotic Dynamics in Mechanics, 483–92. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5320-1_47.

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Bhatt, Yogesh Pradeep, Ashutosh Arun Joglekar, and Dattatray B. Hulwan. "Thermal Design and Performance Analysis of a Cross Flow Heat Exchanger Using Plain and Almond Dimple Tubes." In Techno-Societal 2018, 725–43. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16962-6_73.

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Sallam, Omar Khaled, Ahmad Taher Azar, Amr Guaily, and Hossam Hassan Ammar. "Tuning of PID Controller Using Particle Swarm Optimization for Cross Flow Heat Exchanger Based on CFD System Identification." In Advances in Intelligent Systems and Computing, 300–312. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31129-2_28.

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Conference papers on the topic "Cross-flow heat exchangers"

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Fakheri, Ahmad. "Thermal Efficiency of the Cross Flow Heat Exchangers." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13575.

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The heat exchanger efficiency is defined as the ratio of the actual heat transfer in a heat exchanger to the optimum heat transfer rate. The optimum heat transfer rate, qopt, is given by the product of UA and the Arithmetic Mean Temperature Difference, which is the difference between the average temperatures of hot and cold fluids. The actual rate of heat transfer in a heat exchanger is always less than this optimum value, which takes place in an ideal balanced counter flow heat exchanger. It has been shown that for parallel flow, counter flow, and shell and tube heat exchanger the efficiency is only a function of a single nondimensional parameter called Fin Analogy Number. The function defining the efficiency of these heat exchangers is identical to that of a constant area fin with an insulated tip. This paper presents exact expressions for the efficiencies of the different cross flow heat exchangers. It is shown that by generalizing the definition of Fa, very accurate results can be obtained by using the same algebraic expression, or a single algebraic expression can be used to assess the performance of a variety of commonly used heat exchangers.
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Kelly, Kevin W., Andrew McCandless, Christoffe Marques, Ryan A. Turner, and Shariar Motakef. "High Performance Micro-Channel Cross Flow Heat Exchangers." In ASME 3rd International Conference on Microchannels and Minichannels. ASMEDC, 2005. http://dx.doi.org/10.1115/icmm2005-75249.

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The performance of a micro-channel gas-liquid cross flow heat exchanger, manufactured by the LIGA technique is presented. Large heat transfer coefficients are achieved on the gas side by achieving gas-flow passage dimensions as low as 300 microns. Cross flow heat exchanger panels have been produced as large as 20 cm by 15 cm. These panels can be arranged in a variety of ways to produce heat exchangers capable of handling large thermal loads. Experimental results have shown that these heat exchangers are approximately one order of magnitude better, in terms of heat transfer per unit volume, than the commercially available tube-fin heat exchangers with characteristic cross flow channel dimensions that are typically three times larger.
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Lankalapalli, Kiran, Ahmed ElSawy, and Stephen Idem. "Performance Analysis of Multi-Pass Cross-Flow Heat Exchangers." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87049.

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A steady state sensible performance analysis of multi-pass cross-flow finned-tube heat exchangers is reported. The investigation considers various flow circuiting, such as counter cross-flow, parallel cross-flow, and cross-flow where the tube-side flow is in parallel. A previously developed matrix approach is used to evaluate the heat exchanger performance in each tube pass. The equations required to model the thermal performance of these configurations are presented, and the thermal performance is compared for each type of flow circuiting. Thereafter a parametric study on cross-flow heat exchanger performance is performed by varying physically significant parameters such as number of transfer units (NTU) and capacity rate ratios, and the graphical results for each type of flow circuiting are presented both for both two-pass and three-pass arrangements. A consistent criterion is proposed for each case, wherein increasing the NTU beyond a certain threshold value does not significantly improve heat exchanger thermal performance.
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Silaipillayarputhur, Karthik, and Stephen A. Idem. "Transient Response of a Cross Flow Heat Exchanger Subjected to Temperature and Flow Perturbations." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52562.

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The transient performance of a multi-pass cross flow heat exchanger subjected to temperature and mass flow rate perturbations, where the heat exchanger flow circuiting is neither parallel flow nor counter flow, is considered in this work. A detailed numerical study was performed for representative single-pass, two-pass, and three-pass heat exchangers. Numerical predictions were obtained for cases where the minimum capacity rate fluid was subjected to a step change in inlet temperature in absence of mass flow rate perturbations. Likewise, numerical predictions were obtained for the heat exchangers operating initially at steady state, where a step mass flow rate change of the minimum capacity rate fluid was imposed in the absence of any fluid temperature perturbations. The transient performance of this particular heat exchanger configuration subjected to these temperature and flow disturbances has not been discussed previously in the available literature. In the present study the energy balance equations for the hot and cold fluids and the heat exchanger wall were solved using an implicit central finite difference method. A parametric study was conducted by varying the dimensionless quantities that govern the transient response of the heat exchanger over a typical range of values. Because of the storage of energy in the heat exchanger wall, and finite propagation times associated with the inlet perturbations, the outlet temperatures of both fluids do not respond instantaneously. The results are compared with previously published transient performance predictions of multi-pass counter flow and parallel flow heat exchangers.
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Nonino, Carlo, and Stefano Savino. "NUMERICAL PREDICTION OF FLUID FLOW AND HEAT TRANSFER IN CROSS-FLOW MICRO HEAT EXCHANGERS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.640.

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Nonino, Carlo, and Stefano Savino. "NUMERICAL PREDICTION OF FLUID FLOW AND HEAT TRANSFER IN CROSS-FLOW MICRO HEAT EXCHANGERS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.cht-7.640.

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Dasgupta, Sarbadaman, Faisal A. Siddiqui, Md Abdul Quaiyum, Serena A. Al-Obaidi, and Amir Fartaj. "Experimental Study on Air Cooling via a Multiport Mesochannel Cross-Flow Heat Exchanger." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58257.

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Researchers are moving forward to provide energy efficient, compact and inexpensive heat exchangers. Main focus is being deployed to the heat exchangers comprising narrow size flow channels such as mesochannels and microchannels for their augmented heat transfer characteristics, compactness and energy efficiency compared to conventional heat exchangers with the same heat exchange duty. Air to water cross-flow heat exchangers are encountered in many engineering applications. While numerous investigations were performed to characterize the heat transfer and fluid flow in mesochannels and microchannels, the literatures examining the air side heat transfer and flow behaviors in the cross-flow mesochannel heat exchangers are inadequate. In the current study air side heat transfer and flow characteristics of cross-flow cooling of air through a multiport slab mesochannel heat exchanger were investigated experimentally. The major components of experimental setup are the closed loop integrated thermal wind tunnel, liquid circulation network with heat add or removal system arrangement, sets of measuring instruments, data acquisition system, and multiport slab mesochannel heat exchanger as the test specimen. The multiport slab mesochannel heat exchanger consists of 15 finned aluminum slabs with 304 mm × 304 mm size frontal area and 100 mm flow length across the direction of air flow. Each slab contains 68 flow channels of 1mm circular diameter. Cold deionized (DI) water at a constant mass flow rate (0.0196 kg/s) was forced to flow through the mesochannels whereas the hot air at different velocities was allowed to pass through the finned passages of the heat exchanger core in cross-flow orientation. The inlet air temperature was changed in three levels (28°C, 33°C and 38°C) while maintaining a constant inlet water temperature of 8° C. The air velocity was varied in four steps (3.5m/s, 5.5m/s, 7.5m/s, and 9.5 m/s) at each temperature level. In the present study heat transfer and fluid flow key parameters such as heat transfer rate (Q˙), number of transfer units (NTU), effectiveness (ε), overall thermal resistance (Rtotal), and the air side Nusselt number (Nua) as well as Reynolds number (Rea) were examined in the region of the air side Reynolds number at the range of 972–2758, with a constant water side Reynolds number of 135. Heat balance performance of the experiment was found to be 4% for all operating conditions. The air side thermal resistance was found to be dominating over the overall thermal resistance ranging from 85% to 91% of the overall thermal resistance. The effect of air side Reynolds number on air side Nusselt number was examined and a general correlation of Nusselt number with Reynolds number was obtained as Nua = 0.3972(Rea)0.3766. The Nusselt number value was found to be higher in comparison with other research works for the corresponding Reynolds number range. The multiport mesochannel flat slab has offered uniform temperature distribution into the core. This uniform temperature distribution leads to higher heat transfer over standalone inline flow tube bank.
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Zhang, Hengyun, Zhaoqiang Wang, and Yansong Wang. "Unit Cell Model Formulation and Thermal Performance Analysis for Cross-Flow Heat Exchanger." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6711.

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An analysis for the cross-flow heat exchanger is conducted for electronic cooling applications, with the design goal of dissipating 175W from high power chip by maintaining the chip temperature within 85 °C in a compact space. Liquid to liquid heat exchanger in cross flow arrangement is preferred due to its compact size and high effectiveness. A volume averaging formulation is developed to determine the heat transfer coefficient at the unit cell level. The effects of channel shape, channel size, and heat exchanger material are examined through the heat transfer in the unit cell model. The obtained heat transfer coefficients are also used for the estimation of the heat exchanger thermal performance based on the effectiveness-NTU method. To verify the volume averaging formulation, a full field heat and fluid flow over the cross-flow heat exchangers are investigated through numerical computation. The amount of heat exchanged is extracted and compared with the unit cell model prediction. A fairly good agreement is obtained between the two approaches. Fabrication of cross-flow heat exchanger is further discussed to meet the design target.
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Mandel, Raphael, Martinus Arie, Amir Shooshtari, and Michael Ohadi. "A Heat Spreading Model for Double-Sided, Cross-Flow, Manifold-Microchannel Heat Exchangers." In 2018 17th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm). IEEE, 2018. http://dx.doi.org/10.1109/itherm.2018.8419553.

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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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Reports on the topic "Cross-flow heat exchangers"

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Kim, Man-Hoe, Piotr A. Domanski, and David A. Didion. Performance of R-22 alternative refrigerants in a system with cross-flow and counter-flow heat exchangers. Gaithersburg, MD: National Institute of Standards and Technology, 1997. http://dx.doi.org/10.6028/nist.ir.5945.

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Bimal K. Kad. Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement. Office of Scientific and Technical Information (OSTI), September 2006. http://dx.doi.org/10.2172/894894.

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Bimal K. Kad. Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement. Office of Scientific and Technical Information (OSTI), July 2006. http://dx.doi.org/10.2172/888920.

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Bimal K. Kad. Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes for Hoop Creep Enhancement. Office of Scientific and Technical Information (OSTI), April 2006. http://dx.doi.org/10.2172/881909.

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Bimal K. Kad. Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement. Office of Scientific and Technical Information (OSTI), April 2006. http://dx.doi.org/10.2172/881980.

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Bimal K. Kad. CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT. Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/823796.

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Bimal K. Kad. CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT. Office of Scientific and Technical Information (OSTI), May 2004. http://dx.doi.org/10.2172/828172.

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Bimal Kad. Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement. Office of Scientific and Technical Information (OSTI), September 2007. http://dx.doi.org/10.2172/962926.

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Bimal K. Kad. CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/837874.

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Bimal K. Kad. CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/837878.

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