The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
L. L. Vasiliev - One of the best experts on this subject based on the ideXlab platform.
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Miniature Heat Pipes as compressor cooling devices
Applied Thermal Engineering, 2009Co-Authors: Fabrício C Possamai, I. Setter, L. L. VasilievAbstract:Abstract The purpose of this paper is an analytical and experimental study on Heat transfer and temperature distribution for hermetic refrigeration compressor using miniature Heat Pipes as two-phase thermal control system. Heat pipe based coolers, such as miniature and micro Heat pipe spreaders, loop Heat Pipes and loop thermosyphons ensure the temperature decrease of the most important parts of the compressor – cylinder head, cylinder, oil and compressor shell down to 10–15 °C. The experimental validation of the analytical study was performed for four different designs of miniature Heat Pipes.
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Miniature Heat Pipes as compressor cooling devices
Applied Thermal Engineering, 2009Co-Authors: Fabrício C Possamai, I. Setter, L. L. VasilievAbstract:The purpose of this paper is an analytical and experimental study on Heat transfer and temperature distribution for hermetic refrigeration compressor using miniature Heat Pipes as two-phase thermal control system. Heat pipe based coolers, such as miniature and micro Heat pipe spreaders, loop Heat Pipes and loop thermosyphons ensure the temperature decrease of the most important parts of the compressor - cylinder head, cylinder, oil and compressor shell down to 10-15 °C. The experimental validation of the analytical study was performed for four different designs of miniature Heat Pipes. © 2009 Elsevier Ltd. All rights reserved.
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micro and miniature Heat Pipes electronic component coolers
Applied Thermal Engineering, 2008Co-Authors: L. L. VasilievAbstract:Abstract The time of beginning of Heat pipe science was near 40 years ago with first Heat pipe definition and prediction of most simple cases. Micro and miniature Heat Pipes have received considerable attention in the past decade. The interest stems from the possibility of achieving the extremely high Heat fluxes near 1000 W/cm 2 , needed for future generation electronics cooling application. Now at the computer age some changes of basic equations are performed, more powerful predicting methods are available with increasing awareness of the complexity of Heat Pipes and new Heat pipe generations. But even today Heat Pipes are still not completely understood and solution strategies still contain significant simplifications. Micro and miniature Heat Pipes have some additional complications due to its small size. A short review on the micro and miniature Heat Pipes is presented.
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Micro and miniature Heat Pipes – Electronic component coolers
Applied Thermal Engineering, 2008Co-Authors: L. L. VasilievAbstract:Abstract The time of beginning of Heat pipe science was near 40 years ago with first Heat pipe definition and prediction of most simple cases. Micro and miniature Heat Pipes have received considerable attention in the past decade. The interest stems from the possibility of achieving the extremely high Heat fluxes near 1000 W/cm 2 , needed for future generation electronics cooling application. Now at the computer age some changes of basic equations are performed, more powerful predicting methods are available with increasing awareness of the complexity of Heat Pipes and new Heat pipe generations. But even today Heat Pipes are still not completely understood and solution strategies still contain significant simplifications. Micro and miniature Heat Pipes have some additional complications due to its small size. A short review on the micro and miniature Heat Pipes is presented.
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Heat Pipes in modern Heat exchangers
Applied Thermal Engineering, 2005Co-Authors: L. L. VasilievAbstract:Heat Pipes are very flexible systems with regard to effective thermal control. They can easily be implemented as Heat exchangers inside sorption and vapour-compression Heat pumps, refrigerators and other types of Heat transfer devices. Their Heat transfer coefficient in the evaporator and condenser zones is 103-105 W/m2K, Heat pipe thermal resistance is 0.01-0.03 K/W, therefore leading to smaller area and mass of Heat exchangers. Miniature and micro Heat Pipes are welcomed for electronic components cooling and space two-phase thermal control systems. Loop Heat Pipes, pulsating Heat Pipes and sorption Heat Pipes are the novelty for modern Heat exchangers. Heat pipe air preHeaters are used in thermal power plants to preHeat the secondary-primary air required for combustion of fuel in the boiler using the energy available in exhaust gases. Heat pipe solar collectors are promising for domestic use. This paper reviews mainly Heat pipe developments in the Former Soviet Union Countries. Some new results obtained in USA and Europe are also included. © 2003 Elsevier Ltd. All rights reserved.
Leonard L Vasiliev - One of the best experts on this subject based on the ideXlab platform.
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Heat Pipes in modern Heat exchangers
Applied Thermal Engineering, 2005Co-Authors: Leonard L VasilievAbstract:Abstract Heat Pipes are very flexible systems with regard to effective thermal control. They can easily be implemented as Heat exchangers inside sorption and vapour-compression Heat pumps, refrigerators and other types of Heat transfer devices. Their Heat transfer coefficient in the evaporator and condenser zones is 10 3 –10 5 W/m 2 K, Heat pipe thermal resistance is 0.01–0.03 K/W, therefore leading to smaller area and mass of Heat exchangers. Miniature and micro Heat Pipes are welcomed for electronic components cooling and space two-phase thermal control systems. Loop Heat Pipes, pulsating Heat Pipes and sorption Heat Pipes are the novelty for modern Heat exchangers. Heat pipe air preHeaters are used in thermal power plants to preHeat the secondary–primary air required for combustion of fuel in the boiler using the energy available in exhaust gases. Heat pipe solar collectors are promising for domestic use. This paper reviews mainly Heat pipe developments in the Former Soviet Union Countries. Some new results obtained in USA and Europe are also included.
N Nethaji - One of the best experts on this subject based on the ideXlab platform.
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Heat transfer characteristics of nanofluids in Heat Pipes a review
Renewable & Sustainable Energy Reviews, 2013Co-Authors: R Sureshkumar, Tharves S Mohideen, N NethajiAbstract:Extensive research work on Heat transfer in Heat pipe using conventional working fluids has been carried out over the past decade. Heat transfer in Heat Pipes using suspensions of nano meter–sized solid particles in base liquids have been investigated in recent years by various researchers across the world for finding new opportunities. The suspended nanoparticles effectively enhance the transport properties and Heat transfer characteristics of base fluids in Heat Pipes. The study reveals an improvement in the thermal efficiency and reduction in the thermal resistance of Heat pipe with nanofluids, than that of conventional working fluids. This paper reviews and summarizes recent research on fluid flow and the Heat transfer characteristics of nanofluids in Heat Pipes and identifies perspective of nanofluids that can be used in Heat Pipes for further research.
Mohammad H. Ahmadi - One of the best experts on this subject based on the ideXlab platform.
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A review on using nanofluids in Heat Pipes
Journal of Thermal Analysis and Calorimetry, 2019Co-Authors: Mohammad Alhuyi Nazari, Roghayeh Ghasempour, Mohammad H. AhmadiAbstract:The thermophysical specifications of working fluid play a key role in thermal performance of various types of Heat Pipes. Fluids with high thermal conductivity, low viscosity and surface tension are more favorable to be applied in Heat Pipes. In order to have fluids with higher thermal conductivity, adding nanoparticles can be an acceptable idea. In the present study, the effects of using nanofluids in several types of Heat Pipes are reviewed. The nanofluids are categorized based on the types of particles (as carbonic, metallic, etc.). Based on the results of the literature review, applying nanostructures in the base fluid can significantly reduce the thermal resistance of Heat Pipes compared with utilizing pure as operating fluid. For instance, it is observed that using graphene oxide/water nanofluid in pulsating Heat pipe reduces the thermal resistance up to 42% in comparison with the water-filled Heat pipe. In addition, reviewed studies revealed that the type of nanoparticle, concentration and their stability are among the most important parameters affecting thermal performance. The enhancement in thermal performance of Heat Pipes by using nanofluid is mainly attributed to higher thermal conductivity of the nanofluids and increase in nucleation sites.
D. Mullen - One of the best experts on this subject based on the ideXlab platform.
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recent developments of lightweight high performance Heat Pipes
Applied Thermal Engineering, 2012Co-Authors: Xu Yang, D. MullenAbstract:Abstract Heat Pipes, known as “super thermal conductors” have been widely used in many areas for more than 50 years. Currently, due to the various requirements put on cooling systems, such as lightweight, better Heat transfer performance, and optimised appearance, Heat Pipes have been improved significantly in the past decades. This paper summarises the recent developments of lightweight, high performance Heat Pipes. Various methods or approaches to achieve the requirements of lightweight and high performance are introduced. The applications of lightweight materials can help reduce by up to 80% the weight of conventional copper Heat Pipes; however the lightweight material often has problems of corrosion. Although improving the design of wick structures and changing the size of conventional Heat pipe assemblies can help to reduce weight and achieve high Heat flux, there are still some limitations to the applications of lightweight materials such as magnesium due to its incompatibility with some working fluids.
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Recent developments of lightweight, high performance Heat Pipes
Applied Thermal Engineering, 2012Co-Authors: Xu Yang, Y. Y. Yan, D. MullenAbstract:Heat Pipes, known as "super thermal conductors" have been widely used in many areas for more than 50 years. Currently, due to the various requirements put on cooling systems, such as lightweight, better Heat transfer performance, and optimised appearance, Heat Pipes have been improved significantly in the past decades. This paper summarises the recent developments of lightweight, high performance Heat Pipes. Various methods or approaches to achieve the requirements of lightweight and high performance are introduced. The applications of lightweight materials can help reduce by up to 80% the weight of conventional copper Heat Pipes; however the lightweight material often has problems of corrosion. Although improving the design of wick structures and changing the size of conventional Heat pipe assemblies can help to reduce weight and achieve high Heat flux, there are still some limitations to the applications of lightweight materials such as magnesium due to its incompatibility with some working fluids. © 2011 Elsevier Ltd. All rights reserved.
