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Статті в журналах з теми "Two-phase closed thermosyphon"
Wang, Xin Yu, Gong Ming Xin, Fu Zhong Tian, and Lin Cheng. "Effect of Internal Helical Microfin on Condensation Performance of Two-Phase Closed Thermosyphon." Advanced Materials Research 516-517 (May 2012): 9–14. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.9.
Повний текст джерелаChehrazi, Mohammad, and Bahareh Moghadas. "Experimental study of single walled carbon nanotube/water nanofluid effect on a two-phase closed thermosyphon performance." Journal of the Serbian Chemical Society, no. 00 (2020): 70. http://dx.doi.org/10.2298/jsc200628070c.
Повний текст джерелаPonomarev, Konstantin, Anastasiya Islamova, and Feoktistov Dmitry. "Critical heat flux in a closed two-phase thermosyphon." EPJ Web of Conferences 196 (2019): 00022. http://dx.doi.org/10.1051/epjconf/201919600022.
Повний текст джерелаMaksimov, V. I., and A. Е. Nurpeiis. "Mathematical modeling of heat transfer in a closed two- phase thermosyphon." Power engineering: research, equipment, technology 21, no. 3 (November 29, 2019): 3–13. http://dx.doi.org/10.30724/1998-9903-2019-21-3-3-13.
Повний текст джерелаReed, J. G., and C. L. Tien. "Modeling of the Two-Phase Closed Thermosyphon." Journal of Heat Transfer 109, no. 3 (August 1, 1987): 722–30. http://dx.doi.org/10.1115/1.3248150.
Повний текст джерелаFaghri, A., M. M. Chen, and M. Morgan. "Heat Transfer Characteristics in Two-Phase Closed Conventional and Concentric Annular Thermosyphons." Journal of Heat Transfer 111, no. 3 (August 1, 1989): 611–18. http://dx.doi.org/10.1115/1.3250726.
Повний текст джерелаBolozdynya, A. I., V. V. Dmitrenko, Yu V. Efremenko, A. V. Khromov, R. R. Shafigullin, A. V. Shakirov, V. V. Sosnovtsev, I. A. Tolstukhin, Z. M. Uteshev, and K. F. Vlasik. "The two-phase closed tubular cryogenic thermosyphon." International Journal of Heat and Mass Transfer 80 (January 2015): 159–62. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2014.09.001.
Повний текст джерелаAghel, Babak, Masoud Rahimi, and Saeed Almasi. "Experimental study on heat transfer characteristics of a modified two-phase closed thermosyphon." Thermal Science 21, no. 6 Part A (2017): 2481–89. http://dx.doi.org/10.2298/tsci150616118a.
Повний текст джерелаHarley, C., and A. Faghri. "Complete Transient Two-Dimensional Analysis of Two-Phase Closed Thermosyphons Including the Falling Condensate Film." Journal of Heat Transfer 116, no. 2 (May 1, 1994): 418–26. http://dx.doi.org/10.1115/1.2911414.
Повний текст джерелаWu, Zhang, Li, and Xu. "Effect of the Inclination Angle on the Steady-State Heat Transfer Performance of a Thermosyphon." Applied Sciences 9, no. 16 (August 13, 2019): 3324. http://dx.doi.org/10.3390/app9163324.
Повний текст джерелаДисертації з теми "Two-phase closed thermosyphon"
Park, Rohjoon. "Two-phase closed thermosyphon with two-fluid mixtures." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7685.
Повний текст джерелаFadhl, Bandar. "Modelling of the thermal behaviour of a two-phase closed thermosyphon." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12871.
Повний текст джерелаKafeel, Khurram. "Modelling and simulation of two-phase closed thermosyphones using two-fluid method." Thesis, University of Manchester, 2014. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:239221.
Повний текст джерелаRhi, Seok-Ho. "A cooling system using two-phase closed thermosyphon for telecommunication MCM: Experiment and simulation." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9855.
Повний текст джерелаRemella, Siva Rama Karthik. "Operation and Heuristic Design of Closed Loop Two-Phase Wicked Thermosyphons (CLTPWT) for Cooling Light Emitting Diodes (LEDs)." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522314073895889.
Повний текст джерелаSittmann, Ilse. "Inside-pipe heat transfer coefficient characterisation of a one third height scale model of a natural circulation loop suitable for a reactor cavity cooling system of the Pebble Bed Modular Reactor." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6708.
Повний текст джерелаENGLISH ABSTRACT: The feasibility of a closed loop thermosyphon for the Reactor Cavity Cooling System of the Pebble Bed Modular Reactor has been the subject of many research projects. Difficulties identified by previous studies include the hypothetical inaccuracies of heat transfer coefficient correlations available in literature. The aim of the research presented here is to develop inside-pipe heat transfer correlations that are specific to the current design of the RCCS. In order to achieve this, a literature review is performed which identifies reactors which employ closed loop thermosyphons and natural circulation. The literature review also explains the general one-dimensional two-fluid conservation equations that form the basis for numerical modelling of natural circulation loops. The literature review lastly discusses available heat transfer coefficient correlations with the aim of identifying over which ranges and under which circumstances these correlations are considered accurate. The review includes correlations commonly used in natural circulation modelling in the nuclear industry in aims of identifying correlations applicable to the modelling of the proposed RCCS. One of the objectives of this project is to design and build a one-third-height-scale model of the RCCS. Shortcomings of previous experimental models were assessed and, as far as possible, compensated for in the design of the model. Copper piping is used, eliminating material and surface property uncertainties. Several sight glasses are incorporated in the model, allowing for the visual identification of two-phase flow regimes. An orifice plate is used allowing for bidirectional flow measurement. The orifice plate, thermocouples and pipe-in-pipe heat exchangers are calibrated in-situ to minimize experimental error and aid repeatability. Twelve experiments are performed with data logging occurring every ten seconds. The results presented here are limited to selected single and two-phase flow operating mode results. Error analyses and repeatability of experimental measurements for single and two-phase operating modes as well as cooling water mass flow rates are performed, to show repeatability of experimental results. These results are used to mathematically determine the experimental inside-pipe heat transfer coefficients for both the evaporator and condenser sections. Trends in the heat transfer coefficient profiles are identified and the general behaviour of the profiles is thoroughly explained. The RCCS is modelled as a one-dimensional system. Correlations for the friction factor, heat transfer coefficient, void fraction and two-phase frictional multiplier are identified. The theoretical heat transfer coefficients are calculated using the mathematical model and correlations identified in the literature review. Fluid parameters are evaluated using experimentally determined temperatures and mass flow rates. The resulting heat transfer coefficient profiles are compared to experimentally determined profiles, to confirm the hypothesis that existing correlations do not accurately predict the inside-pipe heat transfer coefficients. The experimentally determined coefficients are correlated to 99% confidence intervals. These generated correlations, along with identified and established twophase heat transfer coefficient correlations, are used in a mathematical model to generate theoretical coefficient profiles. These are compared to the experimentally determined coefficients to show prediction accuracy.
AFRIKAANSE OPSOMMING: Die haalbaarheid van ‘n natuurlike sirkulasie geslote lus vir die Reaktor Holte Verkoeling Stelsel (RHVS) van die Korrelbed Modulêre Kern-Reaktor (KMKR) is die onderwerp van talle navorsings projekte. Probleme geïdentifiseer in vorige studies sluit in die hipotetiese onakkuraatheid van hitte-oordrag koëffisiënt korrelasies beskikbaar in literatuur. Die doel van die navorsing aangebied is om binne-pyp hitte-oordrag koëffisiënt korrelasies te ontwikkel spesifiek vir die huidige ontwerp van die RHVS. Ten einde dit te bereik, word ‘n literatuurstudie uitgevoer wat kern-reaktors identifiseer wat gebruik maak van natuurlike sirkulasie lusse. Die literatuurstudie verduidelik ook die algemene een-dimensionele twee-vloeistof behoud vergelykings wat die basis vorm vir numeriese modellering van natuurlike sirkulasie lusse. Die literatuurstudie bespreek laastens beskikbare hitte-oordrag koëffisiënt korrelasies met die doel om te identifiseer vir welke massavloei tempo waardes en onder watter omstandighede hierdie korrelasies as korrek beskou is. Die ontleding sluit korrelasies in wat algemeen gebruik word in die modellering van natuurlike sirkulasie in die kern industrie met die hoop om korrelasies vir gebruik in die modellering van die voorgestelde RHVS te identifiseer. Een van die doelwitte van die projek is om ‘n een-derde-hoogte-skaal model van die RHVS te ontwerp en te bou. Tekortkominge van vorige eksperimentele modelle is geidentifiseer en, so ver as moonlik, voor vergoed in die ontwerp van die model. Koper pype word gebruik wat die onsekerhede van materiaal en opperkvlak eindomme voorkom. Verkseie deursigtige polikarbonaat segmente is ingesluit wat visuele identifikasie van twee-fase vloei regimes toelaat. ‘n Opening plaat word gebruik om voorwaartse en terugwaartse vloeimeting toe te laat. Die opening plaat, termokoppels en hitte uitruilers is gekalibreer in plek om eksperimentele foute te verminder en om herhaalbaarheid te verseker. Twaalf eksperimente word uitgevoer en data word elke tien sekondes aangeteken. Die resultate wat hier aangebied word, is beperk tot geselekteerde enkel- en tweefase vloei meganismes van werking. Fout ontleding en herhaalbaarheid van eksperimentele metings, om die herhaalbaarheid van eksperimentele resultate te toon. Hierdie is gebruik om wiskundig te bepaal wat die eksperimentele binne-pyp hitte-oordrag koëffisiënte is vir beide die verdamper en kondenseerder afdelings. Tendense in die hitte-oordrag koëffisiënt profiele word geïdentifiseer en die algemene gedrag van die profiles is deeglik verduidelik. Die RHVS is gemodelleer as 'n een-dimensionele stelsel. Korrelasies vir die wrywing faktor, hitte-oordrag koëffisiënte, leegte-breuk en twee-fase wrywings vermenigvuldiger word geïdentifiseer. Die teoretiese hitte-oordrag koëffisiënte word bereken deur middle van die wiskundige model en korrelasies wat in literatuur geidentifiseer is. Vloeistof parameters is geëvalueer met eksperimenteel bepaalde temperature en massa-vloei tempos. Die gevolglike hitte-oordrag koëffisiënt profiles is vergelyk met eksperimentele profiele om die hipotese dat die bestaande korrelasies nie die binne-pyp hitte-oordrag koëffisiënte akkuraat voorspel nie, te bevestig. Die eksperimenteel bepaalde koëffisiënte is gekorreleer en die gegenereerde korrelasies, saam met geïdentifiseerde twee-fase hitte-oordrag koëffisiënt korrelasies, word gebruik in 'n wiskundige model om teoretiese koëffisiënt profiele te genereer. Dit word dan vergelyk met die eksperimenteel bepaalde hitteoordrag koëffisiënte om die akkuraatheid van voorspelling te toon. Tekortkominge in die teoretiese en eksperimentele model word geïdentifiseer en aanbevelings gemaak om hulle aan te spreek in die toekoms.
Lin, Wei-Chung, and 林維忠. "Fabrication of the two-phase closed thermosyphon." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/82967573407814972958.
Повний текст джерела淡江大學
機械與機電工程學系碩士班
95
In this study, a two-phase closed thermosyphon was fabricated with annular array grooved wicks by copper. The thermosyphon consisted of a 82mm long cooper tube having an inside diameter of 19.4mm and outside diameter of 25.4mm. Rectangular grooves with 0.4mm width and 2.4mm deep were cut by WEDM inside the tube to provide device wick capillary. The tube was sealed with other components by copper-silver welding. Thermal performance of the thermosyphon was evaluated experimentally in a fan-heat sink CPU test apparatus with a heating area of 31mm×31mm. the clamping pressure between the thermosyphon and the heat sink was maintained at 13.5 kgf during the test. The influence of working fluid filling ratio and heat load are studied. D.I. water was used as the working fluid and three different filling ratio,10.5%, 18.2% and 29.7% were investigated in the research. After evaluation, the thermosyphon with 18.2% fill rate showed the best performance compared to the other samples. It had a evaporator temperature at 80℃, corresponding to a thermal resistance of 0.35℃/watt at an actual input power of 140W.
Lai, Jung-Hsiang, and 賴榮鄉. "Experimental Evaluation of a Two-Phase Closed Thermosyphon Heat Sink." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/94282220419814455708.
Повний текст джерела大同大學
機械工程研究所
91
This article is mainly concentrated on the properties of heat transfer mechanism of the latent heat rapidly released by two-phase closed thermosyphon. This device will be applied to the conventional aluminum heat sink device so as to improve the efficiency of heat conductivity and meet the efficient heat-sinking demand of the high temperature electronic component in the future. This research mainly aims at three critical points. The first is filling charge ratio of working fluid. When the filling charge ratio is remarkably low, it will cause the drought phenomenon on the evaporated part. If the fulfillment ratio is too high, it will decrease the boiling phenomena. Seeing from the data, the filling charge ratio of 10% will assure of the best efficiency. The second is wind blowing intensity and fan location. Suitable consideration of fan location will make air pass through the long and thin fin pads with the excellent air circulation to improve the overall efficiency of heat sink. Knowing from the present results, it is found that the wind blowing direction from bottom upside will create better efficiency. Also, the value of wind intensity will affect the efficiency of heat conductivity. The third is additive nanometer material. The evaporated part is added with the nanometer materials of high heat conductivity to improve the heat absorption rate. In the present study, the effect due to the nanofluid is not pronounced.
Jheng, Shih-Ying, and 鄭詩穎. "Experiment Analysis of Two-phase Closed Thermosyphon Ice Storage Tank." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/dy6ewf.
Повний текст джерела中國文化大學
機械工程學系數位機電碩士班
107
The purpose of this study is to study and analyze the two-phase thermosyphon heat pipe ice storage tank. The two-phase thermosyphon heat pipe ice storage tank proposed by the research institute has three different operation modes: general mode, ice storage mode and ice melting mode. In this paper, the heat exchange characteristics of two-phase thermosyphon heat pipes in different modes are analyzed experimentally. In the research on the performance of ice storage mode, the working fluids used in the heat pipe of this study are R-134a and R-410a. The internal working fluid of the heat pipe absorbs the heat of the energy storage material to generate boiling, and the gaseous working fluid flows upward to the double set due to buoyancy. In the tube heat exchanger, after the low-temperature refrigerant generated by the vapor compression cycle exchanges heat with the working fluid in the double casing, the working fluid inside the heat pipe condenses, and the condensate acts by gravity along the heat pipe wall. During the process of flowing down to the bottom of the heat pipe, the heat of the energy storage material is absorbed into a film Evaporation, and the heat is returned to the heat storage end of the ice storage end to complete the cycle. In this paper, the ice storage tank running performance test is carried out by experimentally studying the working fluid filling amount of 42%, 50% and 58%. By changing the brine temperature provided by the constant temperature water tank, the cold storage performance of each working fluid filling amount is analyzed and discussed. Analysis of heat exchange characteristics of phase-heat siphon heat pipes.
Liao, Hsueh-Fen, and 廖雪芬. "Theoretical analysis of two-phase closed thermosyphon ice storage tank." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3x8pkv.
Повний текст джерела國立臺灣大學
機械工程學研究所
107
In recent years, due to the dramatic changes in the climate, the amount of electricity used in summer air conditioners has risen sharply. If the peaks can be used for power transfer, using off-peak power for energy storage can help improve the power supply situation in Taiwan. In this study, the superior conduction characteristics of the two-phase thermosyphon heat pipe are used for energy transfer and storage, and can be operated without the supply of external electric energy. Film evaporation and film condensation of the working fluid inside the thermosiphon (Film) Condensation) The high heat transfer capacity mechanism for heat exchange can effectively improve the performance of the ice storage tank. This study proposes a new two-phase thermosyphon heat pipe ice storage tank design, analyzing the ice storage performance of different ice storage temperatures, exploring the parameters of the influence through theoretical models, and compares the heat transfer with the ice storage tank experimental test. The error rate is approximately 3.5% to 6%. Then, based on the theoretical model of the thermoresistive capacitance, the improvement strategy of the thermosyphon heat pipe ice storage tank is analyzed, and the direction of improving the ice storage performance in the future is proposed.
Частини книг з теми "Two-phase closed thermosyphon"
Qingtai, Jiao, and Tao Hanzhong. "Experimental Research of Startup Process of Two-Phase Closed Thermosyphon (TPCT)." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 2038–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_414.
Повний текст джерелаChang, C. S., C. Tao, and R. J. Shyu. "Performance Analysis and Test of a Two-Phase Closed Thermosyphon Heat Exchanger." In Design and Operation of Heat Exchangers, 397–406. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84450-8_35.
Повний текст джерелаPawar, Shrikant V., and Abhimanyu K. Chandgude. "Thermal Performance of Two Phase Closed Thermosyphon with Acetone as Working Fluid." In Techno-Societal 2020, 1005–11. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69921-5_100.
Повний текст джерелаOrdaz-Flores, A., O. García-Valladares, and V. H. Gómez. "Evaluation of the Thermal Performance of a Solar Water Heating Thermosyphon Versus a Two-Phase Closed Thermosyphon Using Different Working Fluids." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 789–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_149.
Повний текст джерелаBezrodny, M. "Fundamental Questions of Closed Two-Phase Thermosyphons." In Heat Pipes and Solid Sorption Transformations, 319–56. CRC Press, 2013. http://dx.doi.org/10.1201/b14864-10.
Повний текст джерелаТези доповідей конференцій з теми "Two-phase closed thermosyphon"
Niro, Alfonso, G. Radaelli, and P. A. Andreini. "HEAT TRANSFER CHARACTERISTICS IN A CLOSED TWO-PHASE THERMOSYPHON." In International Heat Transfer Conference 9. Connecticut: Begellhouse, 1990. http://dx.doi.org/10.1615/ihtc9.140.
Повний текст джерелаGabri, Raphael Ponce, and Fabio Toshio Kanizawa. "Modelling and analysis of closed loop two-phase thermosyphon." In Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2018. http://dx.doi.org/10.26678/abcm.encit2018.cit18-0161.
Повний текст джерелаShokouhmand, H., and N. Sharifi. "Variable Conductance Two-Phase Closed Flat Plate Thermosyphon With Binary Mixture." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72737.
Повний текст джерелаFukano, T., K. Kadoguchi, and Chang-Lin Tien. "OSCILLATION PHENOMENA AND OPERATING LIMITS OF THE CLOSED TWO-PHASE THERMOSYPHON." In International Heat Transfer Conference 8. Connecticut: Begellhouse, 1986. http://dx.doi.org/10.1615/ihtc8.4690.
Повний текст джерелаHaider, S. I., Yogendra K. Joshi, and Wataru Nakayama. "A Natural Circulation Model of the Closed Loop, Two-Phase Thermosyphon for Electronics Cooling." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/htd-24395.
Повний текст джерелаGima, Satoru, Takashi Nagata, Xing Zhang, and Motoo Fujii. "Indirect Cooling of IC Chips Using a Two Phase Closed Thermosyphon Loop." In ASME 2003 International Electronic Packaging Technical Conference and Exhibition. ASMEDC, 2003. http://dx.doi.org/10.1115/ipack2003-35148.
Повний текст джерелаAgostini, B., and M. Habert. "Measurement of the performances of a transparent closed loop two-phase thermosyphon." In HEAT TRANSFER 2010. Southampton, UK: WIT Press, 2010. http://dx.doi.org/10.2495/ht100201.
Повний текст джерелаKadoguchi, K., T. Fukano, and Y. Emi. "OPERATING LIMIT OF A CLOSED TWO-PHASE THERMOSYPHON WITH A BINARY MIXTURE." In International Heat Transfer Conference 10. Connecticut: Begellhouse, 1994. http://dx.doi.org/10.1615/ihtc10.1270.
Повний текст джерелаFukano, T., K. Kadoguchi, and Chang-Lin Tien. "LOCAL HEAT TRANSFER IN A REFLUX CONDENSATION INSIDE A CLOSED TWO-PHASE THERMOSYPHON." In International Heat Transfer Conference 9. Connecticut: Begellhouse, 1990. http://dx.doi.org/10.1615/ihtc9.3740.
Повний текст джерелаShatto, D., J. Besly, and G. Peterson. "A visualization study of flooding and entrainment in a closed two-phase thermosyphon." In 31st Thermophysics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-1832.
Повний текст джерела