What is passive heat sink?
Mar 10, 2023|
A passive heat sink is a device used to manage and dissipate the generated thermal energy of electronics, machinery, and other similar devices. It is typically made of aluminum, copper, or any other metal that provides a good thermal conductivity. The size of the heat sink depends on the amount of thermal energy generated by the device.
Features and Advantages
Features:
- Great heat dissipation and thermal management
- Robust and reliable construction
- Easy to install
- Low cost
The advantages of a passive heat sink include low cost, quiet operation, and no energy consumption. Passive heat sinks are also more reliable than active heat sinks, since they do not require electricity and can continue to cool the device even if a fan fails.
Application
- Power Supplies
- Electronics
- LEDs
Manufacturing
Passive heat sinks are typically manufactured through extrusion or machining processes. Extrusion is the process of forcing molten metal through a die of a specific shape to create the desired part. This method is often used because it can quickly create parts of various shapes and sizes. Machining, on the other hand, requires cutting and shaping of the raw material using special tools. This methodology is used when more complex geometries are required. Other methods such as stamping or casting may also be used. Once the desired shape is obtained, further processes such as milling or drilling may be used to create the desired design.
Difference between active heat sink and passive heat sink
A passive heat sink is an object which disperses heat from a hot object, such as a computer processor, by conduction and convection of ambient air without the use of a fan. A passive heat sink primarily relies on its large surface area to dissipate the heat.
An active heat sink is similar to a passive heat sink, but also uses a fan to further increase the efficiency of the cooling.