Relevant bibliographies by topics / Natural Convection Cooling

Academic literature on the topic 'Natural Convection Cooling'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Natural Convection Cooling"

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Jani, Jaronie Mohd, Sunan Huang, Martin Leary, and Aleksandar Subic. "Analysis of Convective Heat Transfer Coefficient on Shape Memory Alloy Actuatorunder Various Ambient Temperatures with Finite Difference Method." Applied Mechanics and Materials 736 (March 2015): 127–33. http://dx.doi.org/10.4028/www.scientific.net/amm.736.127.

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The demand for shape memory alloy (SMA) actuators for technical applications is steadily increasing; however SMA may have poor deactivation time due to relatively slow convective cooling. Convection heat transfer mechanism plays a critical role in the cooling process, where an increase of air circulation around the SMA actuator (i.e. forced convection) provides a significant improvement in deactivation time compared to the natural convection condition. The rate of convective heat transfer, either natural or forced, is measured by the convection heat transfer coefficient, which may be difficult to predict theoretically due to the numerous dependent variables. In this work, a study of free convective cooling of linear SMAactuators was conducted under various ambient temperatures to experimentally determine the convective heat transfer coefficient. A finite difference equation (FDE) was developed to simulate SMA response, and calibrated with the experimental data to obtain the unknown convectiveheat transfer coefficient, h. These coefficients are then compared with the available theoretical equations, and it was found that Eisakhaniet. almodel provides good agreement with the Experiment-FDE calibrated results. Therefore, FDE is reasonably useful to estimate the convective heat transfer coefficient of SMA actuator experiments under various conditions, with a few identified limitations (e.g. exclusion of other associative heat transfer factors).
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Koyama, Taihei, and Akira Ito. "Motor frame structure using natural convection cooling." Proceedings of the Thermal Engineering Conference 2016 (2016): B112. http://dx.doi.org/10.1299/jsmeted.2016.b112.

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Erbacher, Franz-Josef, and Hans-Joachim Neitzel. "Passive Containment Cooling by Natural Air Convection." Nuclear Technology 111, no. 3 (September 1995): 386–94. http://dx.doi.org/10.13182/nt95-a15868.

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Incropera, F. P. "Convection Heat Transfer in Electronic Equipment Cooling." Journal of Heat Transfer 110, no. 4b (November 1, 1988): 1097–111. http://dx.doi.org/10.1115/1.3250613.

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To maintain the best possible thermal environment in electronic packages, the engineer must establish the most efficient path for heat transfer from the electronic devices to an external cooling agent. The path is typically subdivided into internal and external components, representing, respectively, heat transfer by conduction through different materials and interfaces separating the devices from the package surface and heat transfer by convection from the surface to the coolant. Depending on the scale and speed of the electronic circuits, as well as on constraints imposed by nonthermal considerations, the coolant may be a gas or a liquid and heat transfer may be by natural, forced, or mixed convection or, in the case of a liquid, by pool or forced convection boiling. In this paper a comprehensive review of convection cooling options is provided.
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Yang, Li Jun, Bin Xiang Sun, Wei Wang, and Qi Liu. "Effect of Crushed Rock Layer Width on Natural Convection Cooling of Highway Embankment in Permafrost Regions." Applied Mechanics and Materials 204-208 (October 2012): 1638–43. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1638.

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For the construction of the proposed Qinghai-Tibet Express Highway in permafrost regions, it will be necessary to use the new technique of cooling the ground temperature by the coarsely crushed rock layer with a low fines content. The heat convection governing equations based on airflow function in variable permeability porous crushed rock layer are derived. Comparison of the cooling capability of winter-time natural convection in the crushed rock highway embankments with various widths of crushed rock layer and an air-permeable side slope surface were studied using a finite element method. The result indicates that the cooling capability of natural convection within the crushed rock highway embankment with a crushed rock layer width of 12 m is stronger than that with a crushed rock layer width of 10 m. Under the same temperature and pressure boundaries, the storage of cold energy in the foundation soils below the wider crushed rock highway embankment due to natural convective heat transfer is larger than that below the narrower one.
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Kuang, Zhiming, and Christopher S. Bretherton. "Convective Influence on the Heat Balance of the Tropical Tropopause Layer: A Cloud-Resolving Model Study." Journal of the Atmospheric Sciences 61, no. 23 (December 1, 2004): 2919–27. http://dx.doi.org/10.1175/jas-3306.1.

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Abstract The tropical tropopause layer (TTL), and in particular the cold point tropopause, has been previously suggested as a feature decoupled from convection. Using a cloud-resolving model, the authors demonstrate that convection, in fact, has a cooling effect in the TTL that significantly affects its thermal structure. In particular, the cold point is found to be strongly tied to the convective cooling maximum. The authors interpret these as natural features of an entrainment layer such as the TTL. The recognition that the cold point tropopause is strongly tied to, rather than decoupled from, convection suggests that dehydration processes at the cold point cannot be assumed as gradual and the effect of convection may not be ignored.
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Dyko, M. P., and K. Vafai. "Fundamental Issues and Recent Advancements in Analysis of Aircraft Brake Natural Convective Cooling." Journal of Heat Transfer 120, no. 4 (November 1, 1998): 840–57. http://dx.doi.org/10.1115/1.2825903.

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A heightened awareness of the importance of natural convective cooling as a driving factor in design and thermal management of aircraft braking systems has emerged in recent years. As a result, increased attention is being devoted to understanding the buoyancy-driven flow and heat transfer occurring within the complex air passageways formed by the wheel and brake components, including the interaction of the internal and external flow fields. Through application of contemporary computational methods in conjunction with thorough experimentation, robust numerical simulations of these three-dimensional processes have been developed and validated. This has provided insight into the fundamental physical mechanisms underlying the flow and yielded the tools necessary for efficient optimization of the cooling process to improve overall thermal performance. In the present work, a brief overview of aircraft brake thermal considerations and formulation of the convection cooling problem are provided. This is followed by a review of studies of natural convection within closed and open-ended annuli and the closely related investigation of inboard and outboard subdomains of the braking system. Relevant studies of natural convection in open rectangular cavities are also discussed. Both experimental and numerical results obtained to date are addressed, with emphasis given to the characteristics of the flow field and the effects of changes in geometric parameters on flow and heat transfer. Findings of a concurrent numerical and experimental investigation of natural convection within the wheel and brake assembly are presented. These results provide, for the first time, a description of the three-dimensional aircraft braking system cooling flow field.
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Maciejewski, P. K. "Evidence of a Convective Instability Allowing Warm Water to Freeze in Less Time Than Cold Water." Journal of Heat Transfer 118, no. 1 (February 1, 1996): 65–72. http://dx.doi.org/10.1115/1.2824069.

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This experimental study explores the possibility that warm water may freeze in less time than cold water due to natural convection alone, i.e., in the absence of significant cooling by evaporation. This possibility is rooted in the following two hypotheses: (1) The Rayleigh number associated with a sample of warm water may exceed a critical value above which the convective motions within the water sample may become turbulent and enhance the rate of convective cooling, and (2) the inversion of the flow field that is expected to occur in the vicinity of maximum density, i.e., at 4°C, will occur at different points in the cooling process for identical samples of water at different levels of initial temperature and result in an enhanced rate of convective cooling after the flow field inversion for those cases at higher levels of initial temperature that enter the flow field inversion with higher kinetic energy. The results of this study establish that, under certain circumstances, a sample of water that is initially warm will freeze in less time than an identical sample of water that is initially cold due to natural convection alone.
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O, Mairura Edward, Johana Sigey K, Jeconiah Okello A, and James Okwoyo M. "Natural Convection with Localized Heating and Cooling on Opposite Vertical Walls in an Enclosure." SIJ Transactions on Computer Networks & Communication Engineering 01, no. 04 (October 17, 2013): 01–07. http://dx.doi.org/10.9756/sijcnce/v1i4/0104510101.

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MAO, YADAN, CHENGWANG LEI, and JOHN C. PATTERSON. "Unsteady near-shore natural convection induced by surface cooling." Journal of Fluid Mechanics 642 (December 4, 2009): 213–33. http://dx.doi.org/10.1017/s0022112009991765.

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Natural convection in calm near-shore waters induced by daytime heating or nighttime cooling plays a significant role in cross-shore exchanges with significant biological and environmental implications. Having previously reported an improved scaling analysis on the daytime radiation-induced natural convection, the authors present in this paper a detailed scaling analysis quantifying the flow properties at varying offshore distances induced by nighttime surface cooling. Two critical functions of offshore distance have been derived to identify the distinctness and the stability of the thermal boundary layer. Two flow scenarios are possible depending on the bottom slope. For the relatively large slope scenario, three flow regimes are possible, which are discussed in detail. For each flow regime, all the possible distinctive subregions are identified. Two different sets of scaling incorporating the offshore-distance dependency have been derived for the conduction-dominated region and stable-convection-dominated region respectively. It is found that the scaling for flow in the stable-convection-dominated region also applies to the time-averaged mean flow in the unstable region. The present scaling results are verified by numerical simulations.
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Dissertations / Theses on the topic "Natural Convection Cooling"

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Worthington, D. R. E. "The cooling of electronic power supplies by natural convection." Thesis, University of Exeter, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380691.

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Van, der Westhuizen Pieter Hermanus. "Dynamic modelling of the natural convection water cooling principle / by Pieter v.d. Westhuizen." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1949.

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Gdhaidh, Farouq Ali S. "Heat transfer characteristics of natural convection within an enclosure using liquid cooling system." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/7824.

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In this investigation, a single phase fluid is used to study the coupling between natural convection heat transfer within an enclosure and forced convection through computer covering case to cool the electronic chip. Two working fluids are used (water and air) within a rectangular enclosure and the air flow through the computer case is created by an exhaust fan installed at the back of the computer case. The optimum enclosure size configuration that keeps a maximum temperature of the heat source at a safe temperature level (85°C) is determined. The cooling system is tested for varying values of applied power in the range of 15-40W. The study is based on both numerical models and experimental observations. The numerical work was developed using the commercial software (ANSYS-Icepak) to simulate the flow and temperature fields for the desktop computer and the cooling system. The numerical simulation has the same physical geometry as those used in the experimental investigations. The experimental work was aimed to gather the details for temperature field and use them in the validation of the numerical prediction. The results showed that, the cavity size variations influence both the heat transfer process and the maximum temperature. Furthermore, the experimental results ii compared favourably with those obtained numerically, where the maximum deviation in terms of the maximum system temperature, is within 3.5%. Moreover, it is seen that using water as the working fluid within the enclosure is capable of keeping the maximum temperature under 77°C for a heat source of 40W, which is below the recommended electronic chips temperature of not exceeding 85°C. As a result, the noise and vibration level is reduced. In addition, the proposed cooling system saved about 65% of the CPU fan power.
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Gdhaidh, Farouq A. S. "Heat Transfer Characteristics of Natural Convection within an Enclosure Using Liquid Cooling System." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/7824.

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In this investigation, a single phase fluid is used to study the coupling between natural convection heat transfer within an enclosure and forced convection through computer covering case to cool the electronic chip. Two working fluids are used (water and air) within a rectangular enclosure and the air flow through the computer case is created by an exhaust fan installed at the back of the computer case. The optimum enclosure size configuration that keeps a maximum temperature of the heat source at a safe temperature level (85℃) is determined. The cooling system is tested for varying values of applied power in the range of 15−40𝑊. The study is based on both numerical models and experimental observations. The numerical work was developed using the commercial software (ANSYS-Icepak) to simulate the flow and temperature fields for the desktop computer and the cooling system. The numerical simulation has the same physical geometry as those used in the experimental investigations. The experimental work was aimed to gather the details for temperature field and use them in the validation of the numerical prediction. The results showed that, the cavity size variations influence both the heat transfer process and the maximum temperature. Furthermore, the experimental results ii compared favourably with those obtained numerically, where the maximum deviation in terms of the maximum system temperature, is within 3.5%. Moreover, it is seen that using water as the working fluid within the enclosure is capable of keeping the maximum temperature under 77℃ for a heat source of 40𝑊, which is below the recommended electronic chips temperature of not exceeding 85℃. As a result, the noise and vibration level is reduced. In addition, the proposed cooling system saved about 65% of the CPU fan power.
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Mehrtash, Mehdi. "Numerical Investigation Of Natural Convection From Plate Finned Heat Sinks." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613530/index.pdf.

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Finned heat sink use for electronics cooling via natural convection is numerically investigated. An experimental study from the literature that is for vertical surfaces is taken as the base case and the experimental setup is numerically modeled using commercial CFD software. The flow and temperature fields are resolved. A scale analysis is applied to produce an order-of-magnitude estimate for maximum convection heat transfer corresponding to the optimum fin spacing. By showing a good agreement of the results with the experimental data, the model is verified. Then the model is used for heat transfer from inclined surfaces. After a large number of simulations for various forward and backward angles between 0-90 degrees, the dependence of heat transfer to the angle and Rayleigh number is investigated. It is observed that the contributions of radiation and natural convection changes with the angle considerably. Results are also verified by comparing them with experimental results available in literature.
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Willson, Thomas D. "A study of natural convection cooling of multiple discrete heat sources in a vertical channel." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23126.

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This thesis is a study of missile and target parameters used in second and third order modeling of the tracking subsystem used in radar guided guided missiles. Guidance methods are analyzed to determine which method is optimum in a search for an ideal missile. Target parameters which have an effect on the missile tracking system are analyzed and a target acceleration probability model is discussed. A two dimensional third order tracking model is simulated utilizing a Kalman filter for target parameter estimation and prediction. Linear second and third order tracking models are simulated and compared with the third order Kalman filter tracker. This thesis concludes that a proportional navigation guidance method, with a non linear third order tracking Kalman filter, is the better model. Benefits of using a non linear third order Kalman filter may not overide the cost and complexity of implementation of the model
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Paje, Rufino A. "Experiments on liquid immersion natural convection cooling of leadless chip carriers mounted on ceramic substrate." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/25932.

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Baudoin, Antoine. "Cooling Strategies for Wave Power Conversion Systems." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306706.

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The Division for Electricity of Uppsala University is developing a wave power concept. The energy of the ocean waves is harvested with wave energy converters, consisting of one buoy and one linear generator. The units are connected in a submerged substation. The mechanical design is kept as simple as possible to ensure reliability. The submerged substation includes power electronics and different types of electrical power components. Due to the high cost of maintenance operations at sea, the reliability of electrical systems for offshore renewable energy is a major issue in the pursuit of making the electricity production economically viable. Therefore, proper thermal management is essential to avoid the components being damaged by excessive temperature increases. The chosen cooling strategy is fully passive, and includes no fans. It has been applied in the second substation prototype with curved heatsinks mounted on the inner wall of the pressurized vessel. This strategy has been evaluated with a thermal model for the completed substation. First of all, 3D-CFD models were implemented for selected components of the electrical conversion system. The results from these submodels were used to build a lumped parameter model at the system level. The comprehensive thermal study of the substation indicates that the rated power in the present configuration is around 170 kW. The critical components were identified. The transformers and the inverters are the limiting components for high DC-voltage and low DC-voltage respectively. The DC-voltage—an important parameter in the control strategy for the WEC—was shown to have the most significant effect on the temperature limitation. As power diodes are the first step of conversion, they are subject to large power fluctuations. Therefore, we studied thermal cycling for these components. The results indicated that the junction undergoes repeated temperature cycles, where the amplitude increased with the square root of the absorbed power. Finally, an array of generic heat sources was optimized. We designed an experimental setup to investigate conjugate natural convection on a vertical plate with flush-mounted heat sources. The influence of the heaters distribution was evaluated for different dissipated powers. Measurements were used for validation of a CFD model. We proposed optimal distributions for up to 36 heat sources. The cooling capacity was maximized while the used area was minimized.
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Thompson, Ronald G. Jr. "Natural convection heat transfer studies of simulated and actual electronic components using dielectric liquids for immersion cooling." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23978.

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Two experimental studies of the natural convection characteristics of heated protrusions immersed in dielectric liquids were conducted. the first study used a three by three array of simulated 20 pin dual-in-line chips which were made from aluminum blocks with full heaters. The second set of experiments used a three by three array of thermal evaluation devices mounted on an alumina substrate. The devices were 8.9 mm square chips which contained resistors and a type of temperature sensing transistor. Both studies used an insulated Plexiglas enclosure with a top mounted heat exchanger maintained at a constant 10 degrees C. Each array was mounted on a Plexiglass substrate, and spacers were used to vary the horizontal distance from the components to the enclosure wall. Five separate enclosure widths were used, with a maximum spacing of 40 mm. The vertically oriented aluminum blocks were tested with FC-71 and power levels ranging from 0.115 W/chip to 2.9 W/chip. The non-dimensional data obtained was used to develop an empirical correlation which predicts Nusselt number as a function of Rayleigh number and enclosure width. The correlation was accurate to within 4% of the array averaged data, and the maximum uncertainty in the Nusselt number was 7.4%. The actual electronic components were tested with FC-71, FC-43 and FC-75. Power levels ranged from 0.34 W/chip to 1.48 W/chip. Again, the data obtained was used to develop a Nusselt number correlation. In this case a better correlation of the data was achieved using Grashof number and enclosure width. The correlation is accurate to within 2% of the array averaged data. The maximum Nusselt number uncertainty was 4.7%
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Gaiser, Alfred O. "Natural convection liquid immersion cooling of high density columns of discrete heat sources in a vertical channel." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26097.

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Books on the topic "Natural Convection Cooling"

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Meeting, American Society of Mechanical Engineers Winter. Natural and mixed convection in electronic equipment cooling. New York: American Society of Mechanical Engineers, 1988.

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Davis, G. de Vahl. Three-dimensional natural convection in a cavity with localised heating and cooling. Kensington, N.S.W: University of New South Wales, School of Mechanical and Industrial Engineering, 1988.

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Paje, Rufino A. Experiments on liquid immersion natural convection cooling of leadless chip carriers mounted on ceramic substrate. Monterey, Calif: Naval Postgraduate School, 1989.

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American Society of Mechanical Engineers. Winter Meeting. Natural and mixed convection in electronic equipment cooling: Presented at the Winter Annual Meeting of the American Society of Mechanical Engineers, Chicago, Illinois, November 27-December 2, 1988. New York, N.Y. (United Engineering Center, 345 E. 47th St., New York 10017): The Society, 1988.

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Gaiser, Alfred O. Natural convection liquid immersion cooling of high density columns of discrete heat sources in a vertical channel. Monterey, Calif: Naval Postgraduate School, 1989.

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Thompson, Ronald G. Natural convection heat transfer studies of simulated and actual electronic components using dielectric liquids for immersion cooling. Monterey, Calif: Naval Postgraduate School, 1992.

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Benedict, Terry J. An advanced study of natural convection immersion cooling of 3 x 3 array of simulated components in an enclosure filled with dielectric liquid. Monterey, California: Naval Postgraduate School, 1988.

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Aytar, Erol. Natural convection immersion cooling of an array of heated protrusions in an enclosure filled with dielectric liquid: Effects of enclosure width and fluid Prandtl number. Monterey, Calif: Naval Postgraduate School, 1991.

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Torres, Edgardo I. Natural convection cooling of a 3 by 3 array of rectangular protrusions in an enclosure filled with dielectric liquid: Effects of boundary conditions and component orientation. Monterey, Calif: Naval Postgraduate School, 1988.

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Matthews, Scott T. Natural convection immersion cooling of an array of vertically oriented heated protrusions in an enclosure filled with a dielectric liquid: Effects of enclosure width, Prandtl number and component orientation. Monterey, Calif: Naval Postgraduate School, 1991.

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Book chapters on the topic "Natural Convection Cooling"

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Mobedi, M., H. Yüncü, and B. Yücel. "Natural Convection Heat Transfer from Horizontal Rectangular Fin Arrays." In Cooling of Electronic Systems, 189–202. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1090-7_10.

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Guerine, Ahmed, Abdelkhalak El Hami, and Tarek Merzouki. "Cooling of Circuit Boards Using Natural Convection." In Design and Modeling of Mechanical Systems—III, 969–73. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66697-6_95.

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O’Meara, T., and D. Poulikakos. "Natural Convection Cooling of an Array of Heated Plates Simulating Printed Circuit Boards." In Cooling of Electronic Systems, 123–44. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1090-7_6.

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Jhade, Vidhyasagar, Anil Kumar Sharma, D. Ponraju, B. K. Nashine, and P. Selvaraj. "Natural Convection Heat Transfer Enhancement Using Cooling Pipes in the Heat Generating Debris Bed." In Lecture Notes in Mechanical Engineering, 33–42. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6416-7_4.

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Zhou, Chi, and Shengdong Wang. "An Experimental Study of Finned Heat Pipe Radiator for Cooling High Power Electronic Chips in Natural Convection." In Proceedings of the Eighth Asia International Symposium on Mechatronics, 1344–55. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1309-9_130.

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Singh, Arun Kumar, and A. K. Singh. "Natural Convection of a Micropolar Fluid Between Two Vertical Walls with Newtonian Heating/Cooling and Heat Source/Sink." In Lecture Notes in Mechanical Engineering, 145–57. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5329-0_10.

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Köberle, K., and H. Auracher. "Temperature controlled measurements of the critical heat flux on microelectronic heat sources in natural convection and jet impingement cooling." In Thermal Management of Electronic Systems, 233–42. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1082-2_21.

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Söylemez, M. S., and M. Ünsal. "Computation of Steady Laminar Natural Convective Heat Transfer from Localized Heat Sources in Enclosures." In Cooling of Electronic Systems, 225–38. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1090-7_12.

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Mayinger, F., and Z. G. Wang. "Experiments on Natural Convective Air Cooling of a PCBs Array in a Closed Casing with Inclination." In Cooling of Electronic Systems, 165–78. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1090-7_8.

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Misale, Mario. "ELECTRONIC CABINET COOLING BY NATURAL CONVECTION: INFLUENCE OF VENT GEOMETRY." In Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993, 764–71. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-444-81619-1.50092-7.

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Conference papers on the topic "Natural Convection Cooling"

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Kirez, O., B. Sumer, and Bora Yazici. "Turbulent natural convection cooling of electronics using liquid coolant." In THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer. Connecticut: Begellhouse, 2015. http://dx.doi.org/10.1615/ichmt.2015.thmt-15.790.

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Wits, Wessel W., Davoud Jafari, Yannick Jeggels, Sjoerd van de Velde, Daniel Jeggels, and Norbert Engelberts. "Freeform-Optimized Shapes for Natural-Convection Cooling." In 2018 24rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC). IEEE, 2018. http://dx.doi.org/10.1109/therminic.2018.8593305.

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Ho, Mark K. M., Guillaume Bois, Dave Wassink, and Guan Heng Yeoh. "NATURAL CONVECTION COOLING OF HOT MOLYBDENUM PLATES." In Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer. Connecticut: Begellhouse, 2008. http://dx.doi.org/10.1615/ichmt.2008.cht.2440.

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Maaty, Talal Abou El. "Natural convection cooling for LEU irradiated fuel plates." In 2010 3rd International Conference on Thermal Issues in Emerging Technologies Theory and Applications (ThETA). IEEE, 2010. http://dx.doi.org/10.1109/theta.2010.5766424.

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Malhammar, Ake. "Optimum Sized Air Channels for Natural Convection Cooling." In 1987 The Ninth International Telecommunications Energy Conference. IEEE, 1987. http://dx.doi.org/10.1109/intlec.1987.4794618.

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Zhang, Xingliang, Hao Yu, Wei Zhang, and Yinbiao He. "Numerical Research of CAP1700 IHP Cooling by Natural Convection." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66942.

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The feasibility of using natural convection, in substitution of the cooling fans inside the integrated head package (IHP), to cool the control rod drive mechanism (CRDM) assemblies of the proposed CAP1700 design is studied in this paper. The flow and the temperature fields of the CRDMs and their surrounding areas, including the IHP, all cooled by natural air convection, were simulated using CFD. The results showed that the average temperature of the CRDM wall surface will stay equal to or below 300°C, which is the pre-requisite of using the newly developed high temperature coils. Therefore, cooling by the natural convection is judged to be feasible for the CAP1700 no-fan design.
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Wits, Wessel W., Yannick Jeggels, and Norbert Engelberts. "Pin Fin Heat Sink Optimization for Natural-Convection Cooling." In 2019 25th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC). IEEE, 2019. http://dx.doi.org/10.1109/therminic.2019.8923620.

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Petroski, James. "Advanced Natural Convection Cooling Designs for LED Bulb Systems." 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/ipack2013-73179.

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Abstract:
The movement to LED lighting systems worldwide is accelerating quickly as energy savings and reduction in hazardous materials increase in importance. Government regulations and rapidly lowering prices help to further this trend. Today’s strong drive is to replace light bulbs of common outputs (60W, 75W and 100W) without resorting to Compact Fluorescent (CFL) bulbs containing mercury while maintaining the standard industry bulb size and shape referred to as A19. For many bulb designs, this A19 size and shape restriction forces a small heat sink which is barely capable of dissipating heat for 60W equivalent LED bulbs with natural convection for today’s LED efficacies. 75W and 100W equivalent bulbs require larger sizes, some method of forced cooling, or some unusual liquid cooling system; generally none of these approaches are desirable for light bulbs from a consumer point of view. Thus, there is interest in developing natural convection cooled A19 light bulb designs for LEDs that cool far more effectively than today’s current designs. Current A19 size heat sink designs typically have thermal resistances of 5–7°C/W. This paper presents designs utilizing the effects of chimney cooling, well developed for other fields that reduce heat sink resistances by significant amounts while meeting all other requirements for bulb system design. Numerical studies and test data show performance of 3–4°C/W for various orientations including methods for keeping the chimney partially active in horizontal orientations. Significant parameters are also studied with effects upon performance. The simulations are in good agreement with the experimental data. Such chimney-based designs are shown to enable 75W and 100W equivalent LED light bulb designs critical for faster penetration of LED systems into general lighting applications.
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Gyles, Brian R., Bjarte Hægland, Tine Bauck Dahl, Arnaud Sanchis, Stig Grafsro̸nningen, Reidar Barfod Schu¨ller, and Atle Jensen. "Natural Convection - Subsea Cooling: Theory, Simulations, Experiments and Design." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49030.

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In many future subsea projects, there will be a requirement to cool various fluid streams, either multi-phase or single phase. To meet this need, FMC Kongsberg Subsea AS (FMC) has undertaken a project to develop a practical and robust subsea cooler. The cooler is passive in that heat is transferred to the surrounding sea water by natural convection only. Because of the subsea application, the cooler must have a special geometry to meet requirements for modularization and easy installation/removal. The passive nature of the cooler means that the flow rate of the seawater coolant is not an independent variable, but is directly linked to the cooler geometry. Developing a design method for such coolers requires detailed knowledge of the important heat transfer parameters, to an accuracy far in excess of that normally required for industrial cooler design. This problem has been approached on several levels, including an extensive literature search, theoretical studies, and model testing. One of the first observations was that little research had been done previously on this type of cooler. Much information is available for various pieces of the problem, but it became clear that designing the cooler would require significant development work. Based on the knowledge gained during the initial theoretical studies, a theory for calculating cooler performance presuming one dimensional external coolant flow has been developed. While it is clear that the actual external flow is three-dimensional, the simplified theory gives important insights into how the various design parameters affect cooler performance. To fill in the gaps in theoretical knowledge, a series of model tests designed to quantify internal and external heat transfer coefficients for the special geometry is being proposed. The testing program covers several technical areas and has required the utilization of a number of advanced measurement techniques. For the next phase of the testing program, a complete new test facility has been constructed capable of testing coolers with cross-flows typical of ocean bottom currents. The cooler development program has provided new technology which will be used to construct robust and compact subsea coolers. Because of the emphasis on basic research, fundamental knowledge and insight of the heat transfer mechanisms governing the performance of this type of cooler are acquired. This knowledge gives FMC the capability to design and manufacture subsea coolers which are custom-made to match the exact requirements of a given application.
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Behnia, Masud, and Graham de Vahl Davis. "NATURAL CONVECTION COOLING OF AN ELECTRONIC COMPONENT IN A SLOT." In International Heat Transfer Conference 9. Connecticut: Begellhouse, 1990. http://dx.doi.org/10.1615/ihtc9.540.

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Reports on the topic "Natural Convection Cooling"

1

Buckner, M. R. Natural Convection and Boiling for Cooling SRP Reactors During Loss of Circulation Conditions. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/782817.

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Kawaji, Masahiro, Dinesh Kalaga, Sanjoy Banerjee, Richard R. Schultz, Hitesh Bindra, and Donals M. McEligot. Experimental Investigation of Forced Convection and Natural Circulation Cooling of a VHTR Core under Normal Operation and Accident Scenarios. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1569844.

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Farmer, M. T., D. J. Kilsdonk, C. P. Tzanos, S. Lomperski, R. W. Aeschlimann, and D. Pointer. Topical report: Natural convection shutdown heat removal test facility (NSTF) evaluation for generating additional reactor cavity cooling system (RCCS) data. Office of Scientific and Technical Information (OSTI), September 2005. http://dx.doi.org/10.2172/925335.

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Lisowski, Darius D., Taeseung Lee, Dennis J. Kilsdonk, Nathan C. Bremer, Craig D. Gerardi, Stephen W. Lomperski, and Mitchell T. Farmer. Status Report on the Water-Based NSTF RCCS Capability: Preparations and Design for the Transformation of the Natural Convection Shutdown Heat Removal Test Facility (NSTF) From Air to Water-based Cooling. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1512941.

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