Heat pipe technology, working priniciples, wick structures. The key is that you have to be sure you can keep the opposite end of the heat pipe below the boiling point like maybe 50c so that you ensure phase change back to liquid. The heat pipe described in that article would not be used on a processor. Transports heat from a heat source to a heat sink works as an isothermalizer why twophase thermal system. This article is intended to offer design guidance when using heat pipes for the most prevalent types of electronics applications. Heat pipes are used to transfer heat with minimal temperature difference from the heat source evaporator to the heat sink condenser as well as to spread the heat across a surface. Heat exchanger, any of several devices that transfer heat from a hot to a cold fluid. Heat pipe designs are easily handling current requirements and. A traditional heat pipe is a hollow cylinder filled with a vaporizable liquid. Heat recovery pipes available in wraparound, sidebyside, and split system configurations. Many factors have to be considered in choosing a heat pipe for a specific application.
Oscillating heat pipes ohps use thermally driven, twophase fluid flow to rapidly transfer heat between heat sources and heat sinks. This cutting edge, cloudbased software comes with vastly improved features and capabilities. With these problems in mind, its not surprising that engineers have continued to conduct research to enhance the shellandtube design, resulting in new technology that improves heat exchanger. However, is this really any better than simply using a solid copper pipe for heat transfer. If you need more basic heat pipe information, please visit these two pages. Heat pipe technology heat pipes are thermal transfer devices capable of transferring heat and energy several hundred times faster than conventional methods. It also provides a real life visual demonstration of. Sep 12, 2000 the new software is windowsbased for the pc and features exact parameters, number of rows, fins per inch, btu transfer rate, and more. The effective length leff is a useful indicator of the length of a heat. Additionally, a complete engineering and product manual that provides printable information of all of the companys products and custom engineered applications is included on the cd. By designing the whole system, hpt is able to provide a solution that out performs most glycol systems, with sensible effectiveness 50% for a 6 row system at 500 fpm. This double action is economically accomplished by a heat exchanger. Potassium heat pipes designed for operation at a nominal temperature of 775k have been developed for use in a heat pipe cooled reactor design. Hpt is happy to announce they are going live with their selectplus design software.
Heat pipes are a type of cooling with a large heat flux transport capability. Colmac heat pipe coils can be used for airtoair heat recovery, enhanced dehumidification, free reheat, preheating or precooling of supply air, indirect evaporative cooling, or hermetic heat rejection in hvac and industrial process applications. What are the benefits of heat pipe technology for enclosure. The heat pipes operate in a gravity assist mode with a maximum required power throughput of approximately 16 kw per heat pipe.
Efficient heat transferefficient heat transfer boiling and condensationboiling and condensation small temperature difference between the heat source and. The heat pipe cloudbased software, selectplus, selecting and sizing hpts dehumidifier heat pipes. This heat pipe resource page contains the most extensive information on heat pipes and related technology available anywhere on the web, including fundamentals, limits, wicks, working fluids and envelopes, different kinds of heat pipes, and advanced developments. Learn how to use step by step with tutorial videos. Cloudbased, selectplus is a heat pipe design, pricing, drawingcreation, and plansubmittal software program. We are thermal and fluid engineers dedicated to creating thermalcentric software we want to use. Posted on january 1, 2017 june 8, 2017 by barry slotnick heat pipe technology is an efficient yet effective approach to enclosure cooling that contains no moving parts except for air circulation fans. Today, heat pipes are used in a variety of applications from space to handheld devices that fit in your pocket.
To learn more about the ohp technology and how we innovate custom thermal solutions, click on a topic below. The first step in selecting a heat pipe working fluid and envelopewick material is to determine the operating temperature range. Is there a a free software for designing heat pipes heat exchangers. The heat pipe heat exchangers are used in heat recovery applications to cool the incoming. Is there a a free software for designing heat pipes heat. Use of heat pipe cooling systems in the electronics industry. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. The first result will link you to an faq of a true heat pipe company. This enables them to have a very high heat flux transport capability which can be 1020 times higher than the equivalent diameter solid copper pipe.
Most other energy recovery heat pipes are fabricated with aluminum tubes, which are difficult to repair. Additionally, users can select between standard or performance sintered wick materials. There are a large number of other compatible envelopefluid pairs that are used at other temperature ranges. Amir faghri written to cover simple, intermediate, and advanced approaches to the theoretical and experimental analysis of heat pipes, this second edition emphasizes the physics and mathematics of heat pipes as well as the related technological and experimental issues. A variety of liquids and wicks are used to make a heat pipe, but the principle is the same. The heat pipe has helped to propel the notebook industry to its current level. Heat pipe selection and optimization on demand flow tech, inc. Heat pipe technology inc heat pipe software 20140421. Its not quite business as usual, but as close as we can make it in light of the latest.
This means that the payback time of your investment is minimal. Heat transfer and fluid flow modeling software, crtech. Written by a former senior chief scientist at lockheed who has also worked for westinghouse and the u. Heat pipe technology hpt was founded in 1983 with a grant from the doe to research new applications for passive heat pipe technology. Heat pipes are passiveheat transfer devices that effectively enhance both dehumidification performance and energy utilization. Cloudbased software, accessible from anywhere with an internet. Jan 01, 2017 what are the benefits of heat pipe technology for enclosure cooling. What is a heat pipe heat pipes basics and technology. With origins in 1979 in the uk, the company has inherited a wealth of technical expertise that forms the core of its product range comprising of dehumidifiers, heat pipes, energy recovery ventilator units and uv sterilizers. Hpt tm products have been used successfully in a variety of hvac design applications over the past 35 years for energy recovery and passive dehumidification. Once the wick material and liquid are added, the device is vacuum. Erickson living installs hpts passive dehumidification systems at many of their facilities, saving thousands of dollars in air conditioning and reheat costs.
The link you provided was to a nasa technology, we are referring to heat pipes in cpu coolers. Heat pipes really only move heat from one end to the other, you still need some sort of heat sink to dissipate it to the atmosphere or water cooling or anything. Heat pipes consist of an evaporator, an adiabatic section, and a condenser section. Nasa lewis steadystate heat pipe code software details. Heat pipe wick structures are constructed from various materials and methods. Innovative heat exchanger technology enhances proven designs. Its ideal for situations where cooling is required for sealed enclosures when alternative methods of cooling, such as filtered fans or air conditioning, are not desirable or practical. Heat pipe technology launches new selectplus design software. A heat pipe consists of a working fluid, a wick structure, and a vacuumtight containment unit envelope.
As a result, a new company was established under the name ivanti. Ohp applications and industries ohp technical resources. At the hot interface of a heat pipe a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface. By designing the whole system, hpt is able to provide a solution that out performs most glycol systems, with sensible. Heat sink design and optimization is done jointly between our us headquarters and taiwan facilities, while heat sink manufacturing is done exclusively at the latter. Under normal operations, there is no reason for these ever to leak. This new line with dynamic seasonal offset optimizes the energy recovery performance of hvac systems where supply and exhaust air streams are on the same level.
The nasa lewis research center heat pipe lerchp code was developed to. The most popular heat pipe technology combination as a copper enclosure using a copper sintered wick with water as the working fluid. 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. A heat pipe can find its applications in many sectors of industries, including electronics cooling, energy systems, spacecraft thermal control, permafrost cooling, and manufacturing. The smart waterglycol pump system takes advantage of our pedigree in making optimized heat pipe coils and brings that technology into water coils.
A good description of the history of the heat pipe technology can be found in an early article published by yale eastman currently a director of act in scientific american in may 1968. Heat pipes are recognised as one of the most efficient passive heat transfer technologies available. Enclosureenvelope the heat pipe enclosure is a vacuumsealed vessel tube that houses the wick structure and a working fluid. Other advanced heat pipe wick structures include arteries, bidispersed sintered powder, and composite wick structures. Hpt tm products have been used successfully in a variety of hvac design applications over the past 35 years for energy recovery and passive dehumidification ranging from fan coils to very large commercial applications. Conventional heat pipe technology has been successfully applied in the last thirty years for the thermal management of a variety of applications like heat exchangers, economizers, space applications, and electronics cooling, to cite a few 2. The focus of this heat pipe design guide is on sintered copper heat pipes wwater for electronics cooling applications. You must be registered to access the heat pipe selection software. Ats heat pipes transfer heat through their wick structures and embedded liquid. Selectplus is a nocost cloudbased software solution that directly assists with heat pipe design, including the ability to create engineering drawings and o. Is there a a free software for designing heat pipes heat exchangers used in air conditioning systems hvac. Heat pipe manufacturers generally provide data sheets. Heat pipe science and technology, second edition by dr. The liquid evaporates into a gas that travels to the cooler end of the pipe, condenses back into liquid.
An introduction to pulsating heat pipes electronics cooling. Celsia is a custom heat sink manufacturer specializing in vapor chamber and heat pipe thermal assemblies. 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. With its unique ability to transfer heat over large distances with minimal loss, the heat pipe has emerged as a proven environmentally friendly. Heat pipes have an extremely effective high thermal conductivity. A loop heat pipe with coherent pores integrated to the heat source is considered as a calculation model in this paperfig. The use of heat pipes for the thermal management of notebook computers is a proven and widely applied technology. A laptop computer heat pipe system a heat pipe is a heattransfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces.
In january 2017, as part of the transaction by clearlake capital to acquire landesk, clearlake contributed heat software, its portfolio company, to the new platform investment in landesk. Colmac heat pipe coils for airtoair heat recovery colmac. Carolina heat pipe solutions for energy recovery and. Heat pipe operating temperature range heat pipe technology. Their products are used for aerospace applications. Some new heatsinks are using heat pipes, which contain heat conducting fluid. Heat pipe science and technology, an international journal is encompassed on publishing i fundamental studies of heat and mass transfer in heat pipes and twophase thermosyphons, ii new streams of technology development, iii industrial innovation in electronic thermal control, air conditioning, heating and cooling, aerospace thermal control. Youd run them to another copper block or vapor chamber and run traditional round heatpipes out. We also share information about your use of our site with our social media, advertising and analytics partners. Mar, 2014 hpt is happy to announce they are going live with their selectplus design software. Heat pipe technology, inc heat pipe sizing software. It directly assists with heat pipe design and heat pipe pricing, including the ability to create engineering drawings and enable required document submittals.
The key technology for the thin heat pipe are new innovative internal heat pipe structure with enhanced capillary and wet ability. Browse our table of the most common compatible heat pipe systems, as well as operating temperature ranges on our site today. Jan 01, 2017 air to air heat exchangers use an innovative heat pipe technology that is simple, effective, and reliable. Heat pipes selection procedure heat pipe technology. Sign up to access our exclusive selectplus design software, a direct pipeline to savings. Heat pipes function by absorbing heat at the evaporator end of the cylinder, boiling and converting the fluid to vapor. Contact our experienced engineering team to learn how to recover and save energy with heat pipe technology. Heat pipe computer program htpipe users manual technical. Use of a vapor chamber would also negate the insulation effects of stacking pipes. While solid conductors such as aluminum, copper, graphite and diamond have thermal. The heat input vaporizes the working fluid in liquid form at the wick surface in the. Design considerations when using heat pipes electronics. This combination of metal enclosure, wick type and fluid, when used for cooling electronics, allows for the widest range of operating temperature, the highest heat pipe power carrying capacity, and the ability to handle the highest power densities when compared to other. A heat pipe is a structure with very high thermal conductivity that enables the transportation of heat whilst maintaining almost uniform temperature along its heated and cooled sections.
Hpt heat pipes are economical because of their low initial cost and minimum maintenance requirement. Design considerations when using heat pipes electronics cooling. Apr 21, 2014 cloudbased, selectplus is a heat pipe design, pricing, drawingcreation, and plansubmittal software program. The heat pipes are fabricated with a plurality of charged circuits. Ats engineering ebook advanced thermal solutions, inc. In order to understand heat pipe technology, its first important to understand the function of each of its component parts. I have a thermalright xp120 from about 2006, so nearly 7 years old. A heat pipe is a heat transfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces. May 01, 2003 twophase passive devices are proven present day solutions. Introduction heat pipe is a capillary twophase heat transfer device. A rule of thumb for the effective thermal conductivity of a heat pipe is 4000 wmk.
Heat pipe technology advanced thermal solutions, llc. Upon heating up, the fluid evaporates and carries heat to the opposite end of the metal tube. Energy recovery heat pipes from heat pipe technology hpt provide economical and reliable recovery of both heating and cooling. This typically translates to dissipated heat of between 20200 watts less if power density is high and power density up to around 25 wcm 2. Heat pipe science and technology, an international journal is encompassed on publish ing i fundamental studies of heat and mass transfer in heat pipes and twophase thermo syphons, ii new streams of technology development, iii industrial innovation in elec. This curve is a guide to help estimate heat transport capacity for acts copperwater heat pipes using common wick structures. Furthermore, because the tubes in heat pipe technology heat pipes are copper, leaks can be easily repaired. Nearly 800 enterprise users of new selectplus software are specifying heat pipe technology solutions at a record pace. Heat pipe calculator this program will give a performance curve of a copperwater heat pipe with the given input values. Spiral integral fin and plate fin heat pipe coils are available in a variety of materials for standard and corrosion resistant duty. Advanced cooling technologies presents the factors that set the operating temperature range for heat pipe fluids, both theoretical and practical.
In many engineering applications it is desirable to increase the temperature of one fluid while cooling another. This combination of metal enclosure, wick type and fluid, when used for cooling electronics, allows for the widest range of operating temperature, the highest heat pipe power carrying capacity, and the ability to handle the highest power densities when compared to other combinations. The chip ran pretty hot, enough to cause the system to shut down. Is heat pipe technology any better than solid copper. The effective thermal conductivity of a heat pipe can be three orders of magnitude higher than that of a copper rod with the same size. Distributing heat from the flat pipes to fins in the rad would also be fairly easy.