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heat pipe heat sink

Heat Pipe Heat Sink

Heatell is a leading custom heat sink manufacturer in China specializing in heat pipe thermal assemblies. Heat pipe heat sink design is done together with our expert team and Taiwan-imported facilities.

All of our heat pipe heat sinks are guaranteed certification and compliance to RoHS, ISO9001, and many more. We continuously extend our offerings of heat pipe heat sinks with high excellence and standard quality.

Talk to our engineers today!

Your Professional Heat Pipe Heat Sink Supplier and Manufacturer

Heatel manufacturing company is a trusted expert in heat pipe heat sink and technologies. We manufacture a wide range of heat pipe heat sinks, heat pipes, and heat pipes assemblies.

custom Copper Heat Sink

Our range of heat pipe heat sinks is intended for a wide range of applications.

heat pipe heat sink

Heatell is a leading Chinese manufacturer and supplier that regularly delivers heat pipe heat sink for on-orbit satellite thermal management, terrestrial electronic cooling, and high-temperature calibration equipment.

heat pipe heatsink

Heatell will be your best long-term partner for your business.

heat pipe heat sink

Item TypeHeat Pipe Heat Sink
Plate materialAluminum alloy
Tube materialCopper, aluminum or stainless steel
ShapesBased on your requirements.
Production ProcessAluminum plate cutting—CNC Grooves making—Embedding Tubes (Friction stir welding, Vacuum brazing)—Epoxy adhesive filling—CNC machining—Cleaning—Inspecting—Packing
Technicalextrusion, skived fin, stamping, cold forging, bonded fin, die-cast, liquid cold plates, folded fin
ApplicationInverter, Inverter, Power, IGBT, Rectifier, LED Lighting, Welding Machine, Communication Equipment, Electronics Industry,
Solid State Relay, Controller, Electromagnetic Heating
FinishAnodizing, Mill finish, Electroplating, Polishing, Sandblasted, Powder coating, Silver plating, Brushed, Painted, PVDF, etc.
Deep processCNC,drilling,milling,cutting,stamping,welding,bending,assembling,Custom Aluminum Fabrication
Packagingstandard export packaging or as discussed
Service1. Free sample, Free design;
2. OEM/ODM available;
3. Custom-made request;
4. New design solution suggestion
Delivery time15-20 days after sample confirmed & down payment, or negotiated
PortShanghai Port
Our Advantagesuperior quality with competitive price, Certified enterprises in China

heat sink profile testing

-Standard Packing Option-

* Express Delivery*a
* Ocean Delivery*

-Loading & Shipment-

Heatell: Your Leading Heat Pipe Heat Sink Provider and Manufacturer Near Me

Heat pipe also known as vapor chamber is used in all Heatell custom heat sinks. They are ideal for transporting heat into a remote heat sink.

Each heat pipe heat sink is upgraded to shape, wick porosity, fluid loading, and wick thickness. Flattening and bending are all realized in heat pipe heat sink manufacturing.

Most industries worldwide prefer Heatell heat pipe heat sink including compact electronics enclosures, aerospace, medical, consumer electronics, and HVAC.

Heatell heat pipe heat sink is very popular for its fast-thermal response, lightweight, high thermal conductivity, and wick structure. Their wick structure is either sintered or grooved copper powder.

heat pipe heat sink advantage

Heatell heat pipe heat sink manufacturer has to enlarge our line of off-the-shelf, high-performance, and round heat pipe heat sink to provide the widest options of off-the-shelves heat pipes in the market.

At Heatell, you will find a heat pipe heat sink featuring sintered or grooved. Its wick structure is copper-powder, the perfect solutions for cooling a wide range of applications in numerous industries.

Here in Heatell, you can order heat pipe heat sink in different sizes and shapes. In China, we are a leading supplier and manufacturer of various heat pipe heat sinks, heat pipes, and heat pipe assemblies for intended applications.

In fact, we are a partner of choice in increased performance and developing new functionality with appearing heat pipe technology.

You can rely on Heatell! We have professional Engineers who are in the heat sink Industry. Heatell can custom your heat pipe heat sink demands.

In addition, you can make your own heat pipe heat sink product. Please send your exact specifications and configurations, and Heatell will do and handle the process.

Heatell integrates research and design. We are also performed deep machining services, which include CNC machining, cutting, cold forging, stamping, welding, bending, and more. These will ensure a reliable and highly efficient heat pipe heat sink.

What’smore, Heatell heat pipe heat sink has obtained the best reliability in both Foreign and Domestic markets.

Contact Heatell now for bulk heat pipe heat sink pricing! Purchase and save money!

Heat Pipe Heat Sink: The Ultimate Guide

Heat pipe heat sink plays an integral role in today’s heat managements systems.

A reason this guide will furnish you with all information you need about heat pipe heat sink.

So, if you want to learn more, read this guide.

1.  What Is Heat Pipe Heat Sink?

Heat pipe heat sink is a copper tube, sealed under a vacuum and able to transfer heat from the source.

It has a high thermal conductivity enabling the transfer and dissipation of heat away from the source via a surface tension.

heat pipe heat sink

heat pipe heat sink

It is made up of an enclosed pipe, a steam channel and a liquid wick.

2.  Advantages Of Heat Pipe Heat Sink

They are very cost effective when compared to others like vapour chamber cooling.

This is why they are popular for various applications like in desktops and computers.

The method can transfer heat from the source through the vacuum into the remote condenser and making this process a cycle.

This method is suitable when used with low heat applications such as a desktop computer because it has low installation costs.

The design for heat pipes is very flexible and can work with crowded components of a complex application.

It is easy to wrap around components and transfers the heat away from the source to a condenser.

Since it can bend easily it means it can be used with tools or machines that run in the u-direction or z-direction.

The thermal conductivity of heat pipes is very high hence is able to transfer heat from the source to longer distances.

It has isothermal operation due the isothermal surfaces.

There are no moving parts hence no wear or tear and this makes them durable.

3.  Heat Pipe Heat Sink Construction

The construction is done by the use of the metal tube with a vacuum enclosed within it.

Within the heat pipe, there is a wick that aligns the pipe which works in a similar action as the capillary.

The wick has a fluid running within the pipe.

The heart pipe receives heat through its surface and the heat is converted into vapour under the vacuum.

This change of state leads to rise in pressure making the vapour to flow into the cooling station of the heat pipe.

As it cools, vapour is converted to fluid again and it flows back into the hot region.

At this stage, the cycle begins again as along as heat is maintained at that station.

4.  Where To Use Heat Pipe Heat Sink

They are used with copper heat pipe system which also uses a copper envelope containing water.

This is used for cooling electronics that work under a temperature of about 200C-1500C.

They are also used with almost all computing devices.

They are also used with HVAC systems for the recovery of energy since they don’t need any power.

The are also used with spacecraft and satellites to control their thermal levels.

They provide efficient heat distribution for these applications.

They are use in applications such as solar thermal water heating where distilled water is the fluid used to transfer the heat.

5.  Heat Pipe Vs Heat Sink

Heat sink uses the idea of latent heat exchanger which aids in the movement of heat through a mechanical garget to a coolant.

heat pipe

heat pipe

This coolant can be regular air, liquid medium or fluid, it disseminates away the heat from the garget.

On the other hand, heat pipe is made up of a wick structure, vacuum and a fluid.

The heat produced vaporises the working fluid which move through the vacuum into the condenser.

From there, it is condensed and moved back to the heater section and the process is repeated.

Heat sinks are designed on the basis that aluminium can transfer away the heat generated by the light source.

This means more aluminium is needed where the head produced by the light source is higher.

This makes heat sinks very expensive for the user.

Heat pipe on the other hand is a new technology this ensures that the action of heat sinks is smooth and effective.

With the heat pipe there is no need for more aluminium which also cut costs.

The thermal conductivity for heat pipe is far much better than that of copper.

This means the heat sink must also be a lot smaller.

heat sinkheat sink

When heat pipe is used the transfer of heat from the source is very fast compared to the use of heat sinks alone.

The heat pipe is made out of oxygen-free copper making them last longer hence very durable.

Heat pipes with heat sinks are there in the market are used with almost all figuring gargets and their cooling capacity is improved tremendously.

6.  Increasing Efficiency Of Heat Pipe Heat Sink

The efficiency of the heat pipe heat sink can be increased by making sure to put in place the following factors;

Each heat pipe should receive equal amounts of heat.

This can be achieved by placing the pipes above the heat source directly.

It is important to ensure that each pipe is capable of handling the amount of heat produced.

For instance, a 6mm heat pipe can handle 38 watts and an 8mm heat pipe is capable of handling 52 watts.

The carrying capacity of the heat pipe should derated by 25%.

This is the recommended design practice, for instance, the 6mm option after being derated can handle 85.5 watts.

The bending of the heat pipe should be accounted for through the deration of the 450 bend by 2.5%.

The efficiency of the condenser can be increased through creating heat input at three sections instead of just two sections.

7.  How Heat Sink Heat Pipe Work

The heat sink heat pie has a wick structure, working fluid and a vacuum enclosed withing the heat pipe.

The working fluid is vaporized at the surface of the wick when heat is applied in the section of evaporation.

The vapour with its latent heat not lost has to flow to the section with the condenser.

At this point it releases the latent heat and condenses.

Through the action of capillary, the condensed liquid is moved back into the section meant for evaporation via the wick fluid.

As long as the temperature supply is constant, the two-phase process will continue.

It will stop transferring heat only when the two sections are of the same temperature.

The process is automatic and does not need any source of power.

It begins almost immediately when there’s a temperature difference between the condenser and the evaporator sections.

In case the heated part is of lower temperature compared to that of the cooled section, the liquid is driven back to the heated area through gravity.

The material used for making the heat pipe heat sink is copper which has a very high thermal conductivity.

The thermal conductivity is approximately 400watts/meter K.

As the heat is transferred, the colour of the pipe changes as the heat moves forward.

As the vaporised fluid is transferred, thermalization of the pipe takes place and the temperature is consistent across the heat pipe.

8.  Best Material For Heat Pipe Heat Sink

The most commonly used materials for heat pipe heat sink are copper and aluminium.

Aluminium and its alloys are more popular when it comes to making the heat pipe heat sinks.

It is mechanically soft and light weight but has a very high thermal conductivity of about 229 W/m•K.

Copper is a better thermal conductor compared to aluminium but it is a heavy weight material.

The particular aluminium that is mostly used is extruded aluminium heat sink.

It is also far much expensive compared to aluminium.

Copper heat sinks cannot be extruded but can be skived or machined or soldered into the heat sink base.

Copper material is mostly used when the need for high thermal conductivity is greater than the cost and savings.

Another material which is far much expensive compared to copper is diamond.

Its thermal conductivity is on a higher level approximately 2000 W/m•K.

There are also composite materials that cab used for heat pipe heat sink.

Materials like silicon carbide in aluminium matrix, copper-tungsten pseudoalloy, Dymalloy and beryllium oxide in beryllium matrix.

However, they are normally used as substrates for chips, due to the fact that their electrical conductivity is very poor.

In conclusion, aluminium is considered to be the best heat pipe heat sink material because of its availability, cost and thermal conductivity.

9.  Heat Pipe Heat Sink Thermal Conductivity

The functioning of heat pipe heat sink is influenced by several parameters.

These include; the geometry, the surface treatment, air velocity, the material and the interface with the source of heat.

The electronic parts and bases are designed to be very smooth and flat.

However, when looked at the microscopic level, they are rough surfaces.

The rough surface reduces the contact between the device and the heat sink creating air gaps.

The presence of the air gaps ensures that there is less conduction of heat from the machine to the heat sink.

This is a challenge that has been resolved by the use of thermal interface material which is meant to improve the conduction path.

The conductivity of the heat pipe heat sink is dependent on the thermal resistance of the material used.

This is the difference in the temperature of the condenser and the evaporator per unit of input power.

The thermal resistance of the heat sink is given the symbol θ and the unit is °C/W.

The temperature at the hottest end of the device is called the junction temperature (Tj) while the temperature at the part or surface that touches the heat sink is the case temperature (Tc).

The difference between the two temperature points is what drives the heat sink heat pipe conductivity.

The thermal conductivity of heat pipe heat sink also varies with the length of the heat pipe and with other factors.

Factors like the evaporator and condenser sizes and the level of power being transferred.

Usually, the heat pipe heat sink conductivity is dependent on the length of the heat pipe which also determines the evaporator, condenser and adiabatic lengths.

  • Keff = Q Leff / (A ΔT)
  • In which:
  • Keff = Effective thermal conductivity [W/m.K]
  • Q = Power transported [W]
  • Leff = Effective length = (Levaporator + Lcondenser)/2 + Ladiabatic [m]
  • A = Cross-sectional area [m2]
  • ΔT = Temperature difference between evaporator and condenser sections [°C]

10.  Types Of Heat Pipes Heat Sink

There are several types of heat pipes available in the market;

Vapour chambers: these are applied in isothermalization of surfaces and heat flux transformation.

Variable conductance heat pipes: they change their effective thermal conductivity when the power changes through the use of non-condensable gas.

Pressure controlled heat pipes: this allows for changes to be done on the non-condensable gas to offer an accurate temperature control.

Diode heat pipes: uses the idea of high and low thermal conductivities in the forward and reverse directions respectively.

Thermosyphons: the liquid after condensation returns to the evaporator through the force of gravity.

Rotating heat pipes: the centrifugal forces are used to return the condensed fluid back to the evaporator.

There are two major heat sink categories; the active and passive heat sinks.

The active type consists of moving parts having a fan.

They offer very good performance, but they are very expensive.

The passive type has no moving parts and is very reliable.

However, there is need for constant air flow across the fins.

Heat sinks are also classified based on the process of manufacturing as discussed below:

Extruded heat sinks: generally produced from aluminium.

It is used for most applications and are of low cost, they can also be customised easily to fit into different applications.

extruded heat sink

extruded heat sink

There is a limitation to this type because the dimension is determined by the width of extrusion.

Bonded heat sinks: applied with machines that need heat sinks in large sizes.

This type can combine both copper and aluminium material for the manufacture meaning there is room to improve thermal conductivity

bonded heat sink

bonded heat sink

This type of heat sinks is a bit expensive.

Skived heat sinks: they are usually made from copper, solid block of metal.

They allow for design flexibility and fin density can be achieved easily.

skived heat sink

skived heat sink

The performance is high or medium but they are heavy weight.

Stamped heat sinks: the stamped fins are soldered into the base.

Normally used for applications with low power.

stamped heat sink

stamped heat sink

They are very pocket friendly but has low performance.

Forged heat sinks: made from compressed aluminium or copper.

They could be cold or hot forged and they offer medium performance, and does not offer design flexibility.

forged heat sink

forged heat sink

CNC machined heat sinks: they come with high design flexibility, very high thermal conductivity.

They cost is high and their production is quite slow.

11.  Heat Pipe Heat Sink Design

The designs for heat pipe heat sinks discussed below will focus on the performance and cost.

Heat pipe heat sink with solid aluminium or copper base: this was the initial design for heat pipe heat sinks.

There is a thermal pad used to attach the source of heat to solid aluminium base plate at the bottom.

The base plate and the heat pipes are joined together through soldering.

This design can be improved, if need be, by replacing the aluminium base with a copper base.

Copper offers high performance due to its high thermal conductivity.

Heat pipe heat sink direct contact heat pipes: this enables a direct contact between the source of heat and the heat pipes.

It does not make use of a base plate to enable conductivity or interface to hold the heat pipes to the base plate.

There is need for secondary operations in order to achieve the smooth surfaces that can fit properly with source of heat.

The reduction in the thermal pathway and interface, improves the performance.

However, the cost gets high due to the secondary operations on the heat pipe and heat source.

Heat pipe heat sink U-shaped direct contact vapour chamber: this design can replace four 6mm of the heat pipes.

This design also allows the direct contact between the source of heat and the heat pipes.

It is important to confirm if your supplier can produce one-piece vapour chambers because tow piece cannot work with this design.

There is increased wall thickness with this design and this leads to more weight.

Heat pipe heat sink with 3D vapour chamber: this design uses a base plate which is vapour chamber.

The chamber has condenser tubes laid vertically within the same space.

The 8 open ended condenser tubes are connected to the vapour chamber through brazing using the holes within the chamber.

There is a direct contact between the vapour chamber and the source of heat.

The heat is spread evenly in the XY direction by the source of heat through to the condensing tubes.

This design gives the best performance and it comes with a very high cost.

12.  Benefits Of Heat Pipe Technology In Heat Sink

Some of the benefits include:

  • High Thermal Conductivity (10,000 to 100,000 W/m K): This is the feature that leads to the efficiency of the heat pipes.

The material used for the manufacture of heat pipes must be one that has high thermal conductivity like aluminium and copper.

  • Isothermal: the heat pipes are designed in such a manner that the operating fluid is capable of maintaining the temperature at a constant rate.

Aiding in cooling the application as is required.

  • Passive operation: the heat pipes do not require any power or energy supply to operate and they have no moving components.

The vapour condenses when it reaches the condenser section and flows back into the vaporizer section through the capillary action.

  • Long life: the heat pipe does not undergo wear or tear because there are no moving parts, it is called passive operation.

To avoid corrosion of any kind, the heat pipes come with a protective coating.

The heat pipes are also equipped with several charged circuits and this means there are lower chances that they will leak.

In case one of the circuits can leak, the other circuits will still perform perfectly well.

  • Minimum maintenance: there is no need of any kind of maintenance for heat pipes due to the fact that they have no moving parts.

The only procedure that can be done on them is to clean through a coil cleaner just like with any other cooling coil.

  • Flexible size: the heat pipes can be customised during the manufacture to fit in any kind of application.

They can be compact as well in depth, for instance, a six-row heat pipe can be produced with wall thickness as low as 7 inches.

  • Permits the use of sealed enclosers: the heat pipes can be used with closed loop cooling with no exposure to the surrounding environment.

This means it can easily and efficiently in areas with dust and dirt and will not fail.

The heat pipe can be taken through secondary finishes for a coating that will prevent corrosion in such environments.

  • Low Cost: there is a wide range of materials that can be used to make heat pipes including aluminium which is very cost effective.

The fact that it doesn’t require much maintenance is also a factor that cuts cost.

Since it does not need any source of power or energy to function, this further cut cost.

  • Shock/Vibration tolerant: the materials used to make heat pipes should be shock tolerant to be bale to stand the movement of the machine.

For all your heat pipe heat sink needs, contact us now.

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