2 teeth gear set paradoxical and standard. Vapor spreader heat pipe for heat sink bases, Thermacore Inc. Our dependable Therma-Base® vapor chamber product is a planar, used as the base of a heat sink. Therma-Base delivers higher thermal performance than a traditional heat sink by alleviating spreading resistance found in solid heat sink construction, via three-dimensional spreading, enabling lower device temperature and greater component reliability. Therma-Base has an enhanced capability to accept higher heat fluxes than a traditional aluminum or copper surface. Its smaller size improves system packaging and provides quieter operation through less air flow. Able to operate in any orientation, the Therma-Base passes shock and vibration testing, and thermal cycling (freeze/thaw).
Here's a look at vapor chamber principles in action. Therma-Base Advantages. 冠品化学TeamChem ACF产品介绍. 風扇也智慧 工業電腦鴉雀無聲. 工業電腦以往所處環境不是在製造現場就是戶外，這些環境對噪音的忍受度較高，不過這幾年工業電腦的應用漸趨多元，部分領域如網通或POS機，這些在室內的應用對於噪音較為敏感，因此研華近期推出一系列的安靜系統解決方案。 近十餘年來，電腦大廠紛紛使用聲功率(Sound Power)作為評估聲音大小的指標。 依據 ISO 3744作為量測法規。 最近幾年則強調人因工學，對聲音與噪音的區分越來越注重。 以前常有聲壓或聲功率值測量正常，但聽起來仍覺刺耳不悅的情況發生，主因在於前面所提到的人體感官主觀因素，此一因素會在前兩種量測規範下淡化，Sound Quality的噪音規範，就是在這種需求下產生，規範不同頻段的噪音標準，以減少單音pure tone(或異音)的影響，而更能符合使用者需求。 採用ISO 7779測試規範 噪音值最低控制在35dBA 目前研華採用的測試規範為ISO 7779，由於工業電腦產品的置放地點以機房及室外居多，因此人因因素的影響較小，可以一定程度的被忽略，加上ISO 7779測試規範較單純，較容易被客戶了解而接受。 Smart Fan調整轉速 同時解決散熱及噪音 風扇在IT系統中，主要的功能是散熱，一般系統的運作模式相當簡單，就是電源開啟後，風扇就以固定轉速一直運轉，直到電源關閉，這種作法不但帶來噪音，同時也會提高風扇的損耗，縮短其使用壽命。
ISO 7779規範了環境條件與操作條件，一般環境條件為15℃~30℃，但此一範圍過大，因此ISO7779另制定了實驗室的溫度數值23℃±2℃，在此環境溫度條件下，設計者透過兩種作法達到系統散熱與噪音之間的平衡；一是先設定目標噪音值例如35dBA，再調整風扇轉速，讓風扇轉速能滿足目標噪音值的條件，再來設定關鍵零組件與系統的溫度關聯。 詳細了解更多產品與解決方案，請進一步連結相關網站. What is a Heat Pipe? A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often referred to as the "superconductors" of heat as they possess an extra ordinary heat transfer capacity and rate with almost no heat loss. The idea of heat pipes was first suggested by R.S.Gaugler in 1942. However, it was not until 1962, when G.M.Grover invented it, that its remarkable properties were appreciated and serious development began. It consists of a sealed aluminum or copper container whose inner surfaces have a capillary wicking material.
A heat pipe is similar to a thermosyphon. It differs from a thermosyphon by virtue of its ability to transport heat against gravity by an evaporation-condensation cycle with the help of porous capillaries that form the wick. The three basic components of a heat pipe are: the container the working fluid the wick or capillary structure The function of the container is to isolate the working fluid from the outside environment. Sintered Powder. Heat Exchanger in bio-Chemical Process. Google 搜尋 圖片的結果. Colour changing radiator. Biophan. The following listing of issued and allowed patents are grouped by technology and by use in medical devices. To view in HTML click on the blue patent number.
To view as PDF click on the PDF icon before the patent number. Viewing Patents as PDF may require the use of the free Adobe Reader. MRI Safety for Implants and Surgical Tools Discrete Components and Circuits These patents cover the use of miniature electronic components and circuits to create internal resonance that can block induced energy (which can cause heating), or actively compensate for it eliminating risk to an implant patient being imaged under MRI. US 5,217,010 - ECG Amplifier and Cardiac Pacemaker For Use During Magnetic Resonance Imaging Photonics These patents cover components, subsystems, and systems for implanted devices that use optical fiber technology to eliminate the need for electrically conductive leads, which cause thermal damage and other risks to implant patients being imaged under MRI.
Nanomagnetic Shield Materials. Biothermal Power Source for Implantable Devices. Engineering Tools. A-to-Z Guide to Thermodynamics, Heat & Mass Transfer, and Fluids Engineering Online - Home. Electronics Cooling Magazine – Focused on Thermal Management, TIMs, Fans, Heat Sinks, CFD Software, LEDs/Lighting. SUNON 上海尚昂电子科技有限公司. 5 Things to Know: Industrial Fan Efficiency | 5 Things to Know | Process Barron Blog. Dyson Sitemap. Cyclone. Vortex tube. For the term 'vortex-tube' used in fluid dynamics please see: vorticity Separation of a compressed gas into a hot stream and a cold stream The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separates a compressed gas into hot and cold streams. The air emerging from the "hot" end can reach temperatures of 200 °C, and the air emerging from the "cold end" can reach -50 °C.[1] It has no moving parts. Method of operation[edit] There are different explanations for the effect and there is debate on which explanation is best or correct.
What is usually agreed upon is that the air in the tube experiences mostly "solid body rotation", which means the rotation rate (angular velocity) of the inner gas is the same as that of the outer gas. Another explanation is that as both vortices rotate at the same angular velocity and direction, the inner vortex has lost angular momentum. When used to refrigerate, heat-sinking the whole vortex tube is helpful. History[edit] G. Homemade Vortex Tube. As I mentioned last week I made another Ranque-Hilsch Vortex Cooling Tube that worked better than the last two that I made. If you are interested in the last two HERE and HERE are links to those attempts. In addition to those posts I also made some videos about the construction that you can check out by clicking on the Site Index of Projects link at the top of this blog and scrolling down to the Vortex Cooling Tube links.
Below is a thermal image picture I made of the most recent tube in operation. Before I drone on and on about how I built this I'll provide a few links to resources and information on the web about how these work. Like last time HERE is a Wikipedia link to a nice summary about what goes on inside a Ranque-Hilsch vortex cooling tube. In case you didn't check out the links above here is a quick summary of what a Ranque-Hilsch Vortex Cooling Tube does. I wanted to build this tube really fast so I kept the design as simple as possible. Tube I.D: 8.17mm 0.340" Vapor vortex heat sink. Drying process with vortex tube. VORTEX TUBE patent updates. Vortex tube experiment.
How To Make: Vortex Cooling Tube / Thermal Images .wmv. Segamentation Fan. Axial flow fan having counter-rotating dual impeller blade arrangement - Bradbury, Phillip James. The present invention relates to an axial flow fan, and more particularly to a multiple impeller arrangement with coaxial impellers that rotate in opposite directions. The multiple impeller counter-rotating axial flow fan of the present invention is especially suitable for use in cooling electronic components. A conventional axial flow fan is generally composed of a driving motor, a cylindrical central hub section mounted on a motor shaft attached to the driving motor, a plurality of blades affixed to the hub, and a housing for encasing the fan or impeller, used herein as equivalent terms.
Each of the blades extends radially outward from the central hub section of the fan. The motor shaft is attached to the hub section at a central aperture and thus the hub section may be rotated by the driving motor via the motor shaft. In addition, in order to reduce the overall size of an axial flow fan, it is desirable to utilize narrow chord blades. U.S. Is a cross-sectional assembled view thereof. Dual impeller push-pull axial fan heat sink. Icy Ball. Crosley IcyBall Cold side ball on left, hot side ball on right.
IcyBall was a name given to two early refrigerators, one made by Australian Sir Edward Hallstrom in 1923, and the other design patented by David Forbes Keith of Toronto, Ontario, Canada (filed 1927, granted 1929), and manufactured by American Powel Crosley Jr., who bought the rights to the device. Both devices were unusual in design in that they did not require the use of electricity for cooling. They ran for a day on about a cup of kerosene, allowing rural users lacking electricity to utilise the benefits of refrigeration. Operation (Crosley Icyball)[edit] The Crosley Icyball was an example of a gas-absorption refrigerator, as can be found today in recreational vehicles or campervans. Absorption refrigerators and the more common mechanical refrigerators both cool by the evaporation of refrigerant.
The IcyBall system moves heat from the refrigerated cabinet to the warmer room by using ammonia as the refrigerant. History[edit] Fridge Without Electricity. The new cooling technology is based on a model create by Einstein with78 years ago. The refrigerator that works without electricity useammonia, water and butane in place of Freon. Theenvironment-friendly cooling technology uses ammonia, butane and waterinstead of Freon, substance so harmful to the environment, andconstitutes an important step in combating climate change, writes theBritish daily The Guardian. " The Oxford University engineershave announced that they have completed a prototype of a refrigeratorinvented by Einstein and his colleague, the physicist Leó Szilárd. According to Oxfordengineers, the technology is follow the working principle according towhich the liquids concoct to lower temperatures when air pressurearound them is less.
"If you get on the top of the mountainEverest, you'll find that the water will boil at a temperature muchlower than when the process takes place at the sea level. Source: eco-trees.blogspot.com. 博碩士論文 etd-0727104-223929 詳細資訊. Machine creates ice in nanoseconds. Sandia's huge Z machine, which generates termperatures hottter than the sun, has turned water to ice in nanoseconds.
However, don't expect anything commercial just yet: the ice is hotter than the boiling point of water. "The three phases of water as we know them cold ice, room temperature liquid, and hot vapor, are actually only a small part of water's repertory of states," says Sandia researcher Daniel Dolan. "Compressing water customarily heats it. But under extreme compression, it is easier for dense water to enter its solid phase [ice] than maintain the more energetic liquid phase [water].
" Source: physorg.com. Heat pipes-limitation. Figure 1: Heat pipe operation Introduction All electronic components, from microprocessors to high end powerconverters, generate heat and rejection of this heat is necessary for theiroptimum and reliable operation. As electronic design allows higher throughputin smaller packages, dissipating the heat load becomes a critical design factor. Many of today’s electronic devices require cooling beyond the capability ofstandard metallic heat sinks.
The heat pipe is meeting this need and is rapidlybecoming a main stream thermal management tool. Heat pipes have been commercially available since the mid 1960′s. Only inthe past few years, however, has the electronics industry embraced heat pipes asreliable, cost-effective solutions for high end cooling applications. Heat Pipe Operation A heat pipe is essentially a passive heat transfer device with an extremelyhigh effective thermal conductivity. As heat is input at the evaporator, fluid is vaporized, creating a pressuregradient in the pipe.
Scott D. How does it work? | EcoDrain. Heat conduction. Material can cool electronics 100 times more efficiently. Georgia Tech researchers are working on a new novel material for cooling high-powered military radar gear up to 100 times better than current conductive heat-dissipation technology.Developed in conjunction with Raytheon and DARPA, the material is a composite of copper and diamond, two of the most effective heat-conducting materials. The composite would serve as part of a sandwich of cooling materials called a Thermal Ground Plane, which, combined with a liquid cooling setup, would surround the transmit/receive module in a radar system.Right now, the most high-end copper conductors have a heat conductivity efficiency rating of 200 to 300 watts per meter Kelvin. This new material could potentially have a rating as high as 20,000 watts per meter Kelvin.Because diamond and copper don't bond together particularly well, researchers are still working on designs to create an effective final material, but they're confident their concept will come to fruition.
Source: popsci.com. New Plastic Conducts Heat Better Than Metals, But Only in One Direction. Polymers are generally put to work as insulators, but a team of researchers at MIT has devised a way to turn polyethylene -- the most commonly used polymer -- into a conductor that transfers heat better than many pure metals. But the conversion of insulator to conductor is only half of the breakthrough; by coaxing all the polymer molecules into precise alignment, the researchers have created a polyethylene that conducts heat in only one direction. The plastic material remains an electrical insulator. Getting a bunch of polymer molecules to fall in line is no easy task -- left to their own devices, the molecules will settle into a chaotic arrangement that is resistant to heat transfer. But the MIT team found that by drawing polyethylene fibers slowly out of a solution they could get the molecules to line up facing the same way, creating a material that will let heat pass in one direction but not the other.
[Science Daily] Transparent plastic steel. Metal Foam with shape memory. Scientists have created metal foam made of a nickel-manganese-gallium alloy; metal foam is enough to wrap your mind around, but this is pretty much a super material. It's cheaper, lighter, and potentially stronger than other materials that have its most defining property: it can return to its original shape after being deformed by physical or magnetic force.
This is the very first foam with magnetic shape memory. Because it's a metal, scientists can manipulate its shape using magnetic fields, or just the traditional method of smashing it. Scientists hope the foam can be used in tiny motion control devices, space born applications, or in mechanical devices without mechanical parts. Kind of like the ghost in the machine, don't you think? By turning on a magnetic field the foam will change shape. The researchers created the new material by pouring molten alloy into a piece of porous sodium aluminate salt. Source: physicsbuzz.physicscentral.com. Omnidirectional fan-heatsinks. Zero-energy humidifier. Brazed wick for a heat transfer device.
Micro channel heat pipe having wire cloth wick and method of fabrication. Vapor chamber system for cooling mobile computing systems. Uniform surface temperature heat pipe and method of using the same. 高爾夫 ZAWARD. You are here: Home : Products : 電腦週邊 : 三代高爾夫風扇 : 三代高爾夫DC風扇ZG3-120A Products 三代高爾夫DC風扇ZG3-120A zoom Beginning in 2006, ZAWARD has implemented patented dimple surface design as impellers of fan in ZAWARD products. Features Specification Mechanical data Reviews Download Fan Quick Links © Copyright 2011 Zaward Corporation. Nuventix SynJet. SYNTHETIC JET ACTUATOR patent updates. System and method for thermal management by synthetic jet ejector channel cooling techniques. Thermal management system for distributed heat sources.
Multiple Fan Use - Parallel Operation vs. Series Operation - NMB. Rotary Pumps | Pump Repair & Troubleshooting. Rotary Lobe Pumps From Viking Pump. Composite heat-dissipating system and its used fan guard with additional supercharging function - Delta Electronics Inc. Supercharging structure for a fan - Sunonwealth Electric Machine Industry Co., Ltd. ElectroDynamic Applications, Inc. | Field Emissions Cathode.