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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Patent•
16 Dec 1986
TL;DR: In this article, a wick for use in a capillary loop pump heat pipe is presented. The wick material is an essentially uniformly porous, permeable, open-cell, polyethylene thermoplastic foam having an ultra high average molecular weight of from approximately 1,000,000 to 5,000 000, and an average pore size of about 10 to 12 microns.
Abstract: A wick for use in a capillary loop pump heat pipe. The wick material is an essentially uniformly porous, permeable, open-cell, polyethylene thermoplastic foam having an ultra high average molecular weight of from approximately 1,000,000 to 5,000,000, and an average pore size of about 10 to 12 microns. A representative material having these characteristics is POREX UF which has an average molecular weight of about 3,000,000. This material is fully compatible with the FREONs and anhydrous ammonia and allows for the use of these very efficient working fluids in capillary loops.
83 citations
TL;DR: In this paper, the thermal performance of a thermosyphon filled with R-134a was investigated and the effects of temperature difference between bath and condenser section, fill ratio and coolant mass flow rates on the performance of the thermosYphon were determined.
83 citations
TL;DR: In this paper, a numerical code has been developed to investigate the thermal performances of closed loop Pulsating Heat Pipes (CLPHP), taking into account the effects of the local pressure losses due to the presence of turns which have always been neglected by previous models.
83 citations
Abstract: Oscillatory flow in pulsating heat pipes (PHPs) with arbitrary numbers of turns is investigated numerically. The PHP is placed vertically with the evaporator sections at the top and the condenser sections at the bottom. The governing equations, obtained by analysis of the conservation of mass, momentum, and energy of the liquid and vapor plugs, are nondimensionalized, and the problem is described by eight nondimensional parameters. The numerical solution is obtained by employment of an implicit scheme. The effects of the number of turns, length of the heating and cooling sections, and charge ratio on the performance of the PHP were also investigated.
83 citations
TL;DR: In this article, a numerical study of flow and heat transfer characteristics is made in a double pipe heat exchanger with porous structures inserted in the annular gap in two configurations: on the inner cylinder (A) and on both the cylinders in a staggered fashion (B).
83 citations