Topic
Heat pipe
About: Heat pipe is a research topic. Over the lifetime, 30354 publications have been published within this topic receiving 243669 citations. The topic is also known as: heatpipe & heat-pipe.
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TL;DR: It has been realized that the physical properties of nan ofluids such as surface tension, liquid thermal conductivity, viscosity and density have significant effects on the nanofluid two-phase flow and heat transfer characteristics but the lack of the accurate knowledge of these physical properties has greatly limited the study in this interdisciplinary field.
Abstract: Nanofluids are a new class of fluids engineered by dispersing nanometer-size solid particles in base fluids. As a new research frontier, nanofluid two-phase flow and thermal physics have the potential to improve heat transfer and energy efficiency in thermal management systems for many applications, such as microelectronics, power electronics, transportation, nuclear engineering, heat pipes, refrigeration, air-conditioning and heat pump systems. So far, the study of nanofluid two-phase flow and thermal physics is still in its infancy. This field of research provides many opportunities to study new frontiers but also poses great challenges. To summarize the current status of research in this newly developing interdisciplinary field and to identify the future research needs as well, this paper focuses on presenting a comprehensive review of nucleate pool boiling, flow boiling, critical heat flux, condensation and two-phase flow of nanofluids. Even for the limited studies done so far, there are some controversies. Conclusions and contradictions on the available nanofluid studies on physical properties, two-phase flow, heat transfer and critical heat flux (CHF) are presented. Based on a comprehensive analysis, it has been realized that the physical properties of nanofluids such as surface tension, liquid thermal conductivity, viscosity and density have significant effects on the nanofluid two-phase flow and heat transfer characteristics but the lack of the accurate knowledge of these physical properties has greatly limited the study in this interdisciplinary field. Therefore, effort should be made to contribute to the physical property database of nanofluids as a first priority. Secondly, in particular, research on nanofluid two-phase flow and heat transfer in microchannels should be emphasized in the future.
125 citations
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TL;DR: Pulsating heat pipes (PHPs) are compact cooling equipment used for various applications, such as renewable energy systems, cooling electronic devices, heat recovery systems and many other applications as discussed by the authors.
125 citations
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TL;DR: In this paper, an approach to reduce the thermal resistance of LTES through embedding heat pipes to augment the energy transfer from the heat transfer fluid (HTF) to the phase change material (PCM) was proposed.
125 citations
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05 Apr 1993TL;DR: In this article, a method and apparatus for cooling a multi-chip module using embedded heat pipes is described, where the heat pipes conduct heat away from the semiconductor chips through a heat conductive bonding layer.
Abstract: A method and apparatus is disclosed for cooling a multi-chip module using embedded heat pipes. Semiconductor chips are disposed into the multi-chip module through cavities in the module substrate. The semiconductor chips engage heat pipes embedded within the substrate. The heat pipes conduct heat away from the semiconductor chips through a heat conductive bonding layer.
125 citations
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21 May 2009TL;DR: In this paper, a heat pipe is configured to transfer heat from a central portion of a lighting device to an edge portion of the lighting device, the heat pipe comprising one region which extends along a portion of diameter of a substantially circular, substantially annular shape and another region that extends along the diameter of the shape.
Abstract: A heat pipe configured to transfer heat from a central portion of a lighting device to an edge portion of the lighting device, the heat pipe comprising one region which extends along a portion of a diameter of a substantially circular, substantially annular shape and another region that extends along a diameter of the shape Also, a lighting device comprising a housing, a reflector, a light emitter and a heat pipe as described above Also, a self ballasted lamp comprising a solid state light source, an electrical connector, an AC power supply, a reflector configured to receive light from the source and emit reflected light from an aperture, and a thermal management system Also, a lighting device, comprising a housing, a reflector, a light emitter comprising an array of solid state light emitters, a heat pipe and a sensor
124 citations