What is the difference between a heat sink and a heat pipe?

07/02/2019 Off By admin

What is the difference between a heat sink and a heat pipe?

Smaller heat sink reduces the weight of the luminaire dramatically. This reduces transportation costs as well as the amount of other materials needed. The Heat Pipe effectively transfers heat from the heat source and as a result makes the cooling faster than ever.

How much heat can a heat pipe transfer?

A pipe one inch in diameter and two feet long can transfer 3.7 kW (12.500 BTU per hour) at 1,800 °F (980 °C) with only 18 °F (10 °C) drop from end to end. Some heat pipes have demonstrated a heat flux of more than 23 kW/cm², about four times the heat flux through the surface of the sun.

Do heat pipes work vertically?

Originally Posted by The Heatsink Guide It is quite obvious that this design will only work in vertical orientation. To overcome this limitation, commercially available heat pipes do not rely on gravity alone to move the liquid back to the heat source; they take advantage of capillary action.

Is heat pipe better than copper?

The effective thermal conductivity of a heat pipe is up to 90 times greater than the solid copper for the same size. Lighter in weight when compared to solid copper of the same size. Heat pipes can be used to effectively carry heat from the base of the heatsink to the underutilized sections of the fins.

Is vapor chamber better than heat pipes?

Vapor chambers are most often used to spread heat to a local heat sink, whereas heat pipes are generally better for moving heat to a remote sink. Vapor chambers have a very large continuous area, allowing for better isothermalization of the heat sink.

Is heat pipe a heat sink?

Heatpipe Examples In this example a heatpipe was embedded into a heatsink so that the heat could be spread uniformly. In this example a heatpipe was used to move the heat from a source to a remote radiator. In this example the heatpipe and heatsink were nickel plated.

How do I choose a heat pipe?

Select appropriate pipe material, wick structure, and working fluid

  1. Determine the working fluid appropriate for your application.
  2. Select pipe material compatible to the working fluid.
  3. Select wick structure for the operating orientation.
  4. Decide on the protective coating.

What is heat pipe dry out?

When the quantity of heat pipes is not enough to bring the heat away, the liquid in the wick to the boil and evaporate, which causes there is no liquid to absorb the heat and the heat pipes goes into a dry-out condition.

Will heat pipes work upside down?

Heat pipes work best with the heat source on the “bottom” of the heat pipe with respect to gravity. They will work “upside down” but not nearly as well.

Why are heat pipes copper?

A Heatpipe is a sealed copper tube that is under vacuum, and can transfer heat rapidly away from the source. The High thermal conductivity enables a heat pipe to transfer, and dissipate heat to a more convenient location through a capillary action.

Why copper is used in heat pipes?

Copper has many desirable properties for thermally efficient and durable heat exchangers. First and foremost, copper is an excellent conductor of heat. This means that copper’s high thermal conductivity allows heat to pass through it quickly.