The heat pipe was positioned at different angles of 30, 60, and 90 with the horizontal. Project description by means of knowledge about the theory of heat pipes, one is now able to carry out a basic calculation of a heat pipe. In the present study, porous media is used to increase heat transfer in lam. In the present study, porous media is used to increase heat transfer in laminar flow inside the tube with a constant. Study on heat transfer capacity of the solar horizontal heat pipe. Heatpipes are promising devices for geothermal energy extraction. Abstract an improved design for convective heat transfer in a heat pipe partially filled with porous medium is presented. Hussain2 address for correspondence 1research scholar, pondicherry engineering college, puducherry, india 2department of mechanical engineering, pondicherry engineering college, puducherry, india abstract. At the lhp low operating temperatures, heat leakage induced by saturated temperature differences between the evaporator and compensation chamber is more serious than at high operating. Experimental performance of a heat pipe sciencedirect. Freels2 1vaughn college of aeronautics and technology, new york, ny, usa 2oak ridge national laboratory, oak ridge, tn, usa abstract eccentricity in annular channels contributes to changes in fluid flow. In poland, various solar collector systems are used.
Ats engineering ebook advanced thermal solutions, inc. Mechanical engineering final year project report pdf download. Aug 31, 2019 abstract in this study, pipe diameter effect on flow and heat transfer characteristics of ammonia aluminium sulfate dodecahydrate ammonia alum hydrate. This page contains heat pipes seminar and ppt with pdf report. Journal of electronics cooling and thermal control, 5, 114. Heat pipe example a representative titaniumwater heat pipe with a sintered powder wick has been assembled and tested. A flow control valve 20 is provided between the evaporator section 5 and the condenser section 10 to selectively interrupt communication between said sections. Heat pipe is one of the most efficient tools for heat dissipation in electronics and power systems. Investigations on noncondensation gas of a heat pipe. Thermomechanical design and characterization of flexible.
An experimental heat pipe for spacecraft temperature control systems has been tested in a space environment. Heat pipe operating characteristics can be used to advantage in cryogenic systems. The system performance is tested and compared under two working modes, heating mode and heat charging mode, which provides a reference for the operation regulation and performance optimization of the heat pipe pvt heat pump system. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Explore heat pipe with free download of seminar report and ppt in pdf and doc format. Due to their relatively high density and limited heat transmission capacity, heat pipes are facing urgent challenges in power electronics and power modules.
Journal of environmental quality abstract heat transfer models for a subsurface, water pipe, soilwarming system 1. Study on heat transfer characteristics of reservoir embedded. Heat pipe engineering ebook advanced thermal solutions. Design and testing of fabric composite heat pipes for. The mobile heat pipe cooled fast reactor may contain a plurality of heat pipes that are proximate to a plurality of fuel pins inside the reactor. The influence of the interface on the amplitude and phase of the temperature wave and the relationship between the attenuation of the temperature wave and the gasliquid twophase physical parameters are studied during the operation of the pulsating heat pipe. Heat pipes are very flexible systems with regard to effective thermal control.
However, in an actual application when a heat pipe is soldered or epoxied to the base of a heat sink, the effective thermal conductivity of the heat pipe may be. High temperature water heat pipes heat pipe manufacturer. Abstract and attributes of asme vessel heat transfer surfaces abstract and attributes of asme vessel heat transfer surfaces. A novel measurement theory for inventory of working fluid and. Pdf basic principles of heat pipes and history researchgate. Faculty of mechanical and manufacturing engineering. T is independent of position in the heat exchanger. The comparison of solar energy gaining effectiveness. Heat recovery at wastewater treatment plants using heat. A heat pipe is a heattransfer device that combines the principles of both thermal conductivity. Abstractthe data presented in this article were the basis for the study reported in the research articles entitled climate responsive behaviour heat pipe technology for enhanced passive airside cooling by chaudhry and hughes 10 which presents the passive airside cooling capability of heat pipes in response to gradually varying external temperatures and related to. Please click on any of the images below to view a larger photo of a few of our heat pipe products. The calculations of the various variants of the wick structure of heat pipe and working.
Heat pipe design handbook, volume 1 internet archive. Heat pipes full seminar report, abstract and presentation download. Mvk160 heat and mass transfer may 7, 2012, lund, sweden heat pipe, selection of working. If heat capacity rates of the cold and hot fluids are the same and the heat exchanger is operated in the counterflow regime then. Manufacturing and characterization of welded, sintered. Get more information about green engine pdf download by visiting this link. The fourth system was the heat pipe type under forced convection. A rule of thumb for the effective thermal conductivity of a heat pipe is 4000 wmk. Modeling of heat transfer and flow patterns in a porous. Also get the seminar topic paper on heat pipe with abstract or synopsis, advantages and disadvantages, presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2016 2017.
Haringx 10 modeled the bellow as the combination of annular plates connected by elastic cylinders and derived. The rotor is made of high heat resistance and low expansion rate material such as ceramic. Beginning with a definition of the problem, including the temperature. The temperature difference between the evaporation and condensation sections of a single heat pipe and maximum heat capacity are the index of the thermal performance of a heat pipe for a thermal module manufacturer. A geothermal heatpipe prototype peter zijm mechanical engineering master. Numerical study and sensitivity analysis on convective. Show full abstract lockheed who has also worked for westinghouse and the u. The effect of eccentricity in fully developed annular pipe. Experimental and numerical investigation on a novel heat. Heat production has received more than its share of consideration because it is really the balance between production and loss that determines the body temperature. A heat pipe is a device that effortlessly transports thermal energy from its one point to the other.
The green engine is a six phase, internal combustion engine with much higher expansion ratio. Show full abstract actions on heat and mass transfer of all three zones of heat pipes are given. A cfd model has been developed to predict the performance of lhp due to the change in these parameters. A deployable radiator is one of the key technologies for a high.
Heat pipes full seminar reports, pdf seminar abstract, ppt, presentation, project idea, latest technology details, ask latest information. Journal of environmental quality abstract heat transfer. Influence of gasliquid interface on temperature wave of. Space environment testing of a heat pipe springerlink. Using the heat pipe technology, a cooling system is designed in which the target heat source is the led module 0. Loop heat pipe with coherent porous wick since the porous material used for current heat pipes is usually stochastic structure, it is hard to apply analytical or numerical methods for design optimization. Results show that the performance of the heat pipe that contained a wick was more significant in terms of overall heat transfer coefficient than that with no wick, for the temperature range studied. There have been surprisingly few studies dealing with the mechanism of heat loss. The method of images is used to calculate the heat loss from a hot water pipe buried at a given depth below the surface of a homogeneous soil with a constant soil surface temperature. The green engine is one of the most interesting discoveries of the new millennium.
Half pipe heat transfer surfaces can contain the entire vessel or part of the vessel depending on the application. One of them contains 120 flat plate collectors and works for the preparation of hot water in a. Wind tunnel data of the analysis of heat pipe and wind. Please contact us to find out more about any of the products shown below, or to discuss your specific needs. Heat pipe technology an overview sciencedirect topics. It is a device that is used to transfer thermal energy from one body or fluid stream to another heat exchanger seminar ppt with pdf report heat exchangers are found widely scattered throughout the food process industry. The paper presents an overview of heat pipes, especially those used in different space missions. A heat pipe is a heat removal device comprising a vacuum pipe that charges a certain amount of working fluid and seals the tube. Hence, other than thermal design of the heat pipe, mechanical design of the. The heat pipe temperature reaches the water temperature in about 25 seconds, while the copper rod reaches just 30c after 200 seconds. In this chapter the use of heat pipe technology for spacecraft thermal control is summarized, starting with the. Manufacturing and characterization of welded, sintered condensers for a loop heat pipe by jay d sircar download pdf 8 mb. Experimental and numerical investigation on a novel heat pipe.
Mathematical model for heat transfer limitations of heat pipe. Heat pipes are transport mechanisms that can carry heat fluxes ranging from 10 wcm 2 to 20 kwcm 2 at extremely fast speeds. It has got some unique features that were used for the first time in the making of engines. The original idea of heat pipe was considered in 1944 by gaugler 1 and in 1962 by. Abstract in this study, pipe diameter effect on flow and heat transfer characteristics of ammonia aluminium sulfate dodecahydrate. A lightweight and high thermal performance graphene heat pipe. Several factors have contributed to the science and technology of the present stateofart heat pipe leading to the development of loop heat pipes, micro and miniature heat pipes and micro loop. A heat pipe testing facility was designed and built for the purpose of testing various conventional and fabric composite heat pipes.
The new concept of influence of vibrations on processes in heat pipes is offered. Dynamics of a sodium heat pipe reforming reactor richardson. A mobile heat pipe cooled fast nuclear reactor may be configured for transportation to remote locations and may be able to provide 0. A novel measurement theory for inventory of working fluid. Diode operation of the heat pipe, the ability to conduct heat in one direction only, is useful in protecting the heat load if the heat sink temperature rises above the load temperature. Mechanical engineering final year project report pdf download mini projects, major projects, innovative project topics with abstract diagram and pdf report related to mechanical engineering final year project report pdf download, best mini projects, useful for mechanical college students, diploma students and final year students.
An improved design for convective heat transfer in a heat pipe partially filled with porous medium is presented. It applies the implied heat of the vaporized working fluid instead of the reasonable heat. Heat exchanger is a device for transferring heat from one medium to another. The effect of eccentricity in fully developed annular pipe flow on the convection heat transfer and darcy friction factor s. Study on heat transfer characteristics of reservoir. Heat and mass transfer analysis and modeling in unsaturated ground soils for buried tube systems energy in agriculture 1987 6. Us20160027536a1 mobile heat pipe cooled fast reactor. Review article factors affecting the thermal performance of. Then heat pipe heat exchangers hphe is designed and the simulations of heat pipe heat exchangers hphe for different fluid pairs at cr heat exchanger university of florida.
Pdf heat pipe in modern heat exchangers researchgate. The plurality of heat pipes may extend out of the reactor. However, in an actual application when a heat pipe is soldered or epoxied to the base of a heat sink, the effective thermal conductivity of the heat pipe may be drastically reduced due to the extra thermal resistances added by the bonding. In order to study the heat transfer performance of solar horizontal heat pipes, a highprecision experimental apparatus for heat. Instrumentation and computer interfacing provide for continuous monitoring and. They can easily be implemented as heat exchangers inside sorption and vapourcompression heat pumps, refrigerators. A heat pipe comprises an evaporator section 5 having a radiation absorbing plate 6 a portion of an elongate tube 7, and a condenser section 10 at a distal end of the elongate tube 7 remote from the evaporator section 5. Performance testing of a heat pipe pvt heat pump system.
Show full abstract of heat pipes along with their application, and the reader can obtain a. A practical approach provides a practical study of modern heat pipe. Jun 18, 20 a heat pipe heat exchanger is a simple device which ismade use of to transfer heat from one location to another,using an evaporationcondensation cycle. In this paper, a heat pipe pvt heat pump system is designed and the testing rig is constructed as well. Get heat pipe seminar report and ppt in pdf and doc. Introduction heat pipe is a capillary twophase heat transfer device. This facility allows the testing of heat pipes in a vacuum, at low temperatures, and can accommodate a variety of heat pipe designs. Zhibin wang, yuebin zhang, zhongdong wang, shasha xie, and yang hao study on heat pipe sink for cooling high power led. Therefore, heat pipes are widely used in 1u servers, notebooks, pcs, etc. Design and testing of fabric composite heat pipes for space.
Transports heat from a heat source to a heat sink works as an isothermalizer why twophase thermal system. Historical perspectives, principles of operations, types of heat pipes are discussed. Abstract as the demand for high performance small electronic devices has increased, heat removal from these devices for space use is approaching critical limits. Heat pipes and two phase thermosyphons are heat transfer devices whose operating principles are based on the evaporationcondensation of a. This paper utilizes numerical analysis method to determine the influence of noncondensation gas on the thermal performance of a heat pipe. Heat pipes are one of the most effective procedures to transport thermal energy from one point to another, mostly used for cooling. The aim of this work is to investigate a heat performance of a multilayered oscillating heat pipes heat exchanger mlohphe for the application of heat recovery in heating, ventilation and air conditioning systems hvac systems. Heat exchanger ask latest information, heat exchanger abstract,heat exchanger report,solar tracking system presentation pdf,doc,ppt,heat exchanger technology. If there is a deficiency of working fluid, the heat pipe may fail because of the inability of any artery to fill.
Abstract a prototype of a sodium heat pipe reactor for steam reforming processes has been developed and tested at energy levels up to 6 kw. Peter kew first became involved in heat pipes in the late 1970s as a research officer with international research and development working on a range of heat transfer and energy conservation projects, including heat pipe development which was then led by david reay. In this work, flow patterns and heat transfer in the lhp evaporator wick is studied for various flow rates of the working fluid, wick thermal conductivity, porosity and permeability of wick, heat flux, and gravity condition. A loop heat pipelhp with coherent micronporous evaporative wick is suggested to enhance the. Hvac systems heat recovery with multilayered oscillating. Heat pipes are referred to as the superconductors of heatdue to their fast transfer capability with low heat loss. Heat exchanger ask latest information, heat exchanger abstract, heat exchanger report,solar tracking system presentation pdf,doc,ppt, heat exchanger technology. This article is about heat transport limitation standardused construction wick. Currently, heat pipes are usually made of copper, aluminum or stainless steel.
Jan 10, 2016 get heat pipe seminar report and ppt in pdf and doc. Both experimental and model simulation data were obtained. Abstract and attributes of asme vessel heat transfer surfaces. It is a device that is used to transfer thermal energy from one body or fluid stream to another. The work presents two installations located at a distance of 80 km apart, working in similar external conditions. Numerical study and sensitivity analysis on convective heat.
Loop heat pipe lhp is known as a twophase heat transfer device that utilizes the evaporation and condensation of an operating fluid to transfer heat. Another drawback of excess fluid is peculiar to heat pipes in space, where in zero gravity the fluid can move about the vapour space, affecting the dynamics of the spacecraft. To learn about our use of cookies and how you can manage your cookie settings, please see our cookie policy. By closing this message, you are consenting to our use of cookies. Performance of heat pipe for different working fluids and fill ratios journal of mechanical engineering, vol. A geothermal heatpipe prototype tu delft repositories.
704 1022 1422 1194 109 1301 1215 1547 102 1477 1414 593 1301 668 11 757 316 1166 830 249 295 1110 1008 636 1157 93 1099 212 1101 463 437 1262 969 665