What are the factors that affect the thermal performance of heat sink?

Extrusion Heat Sinks & Profiles for Cost Effective Cooling Solutions

Foshan Liangyin offers a wide variety of ultra-performance straight fin, slant fin, and pin fin extruded heat sinks. These high aspect ratio heat sinks are ideal for applications where there is adequate airflow to take optimum advantage from these designs. We also offers an array of heat sink extrusion profiles with different thermal performances, fin-to-fin spacing, lengths and heights. Extrusion profiles enable engineers to either select or start their design from a pre-tooled extrusion profile for the cooling solution. 

When selecting or designing a Heat sink, the following factors must be considered.

Material

The most common Heat sink material is aluminum alloy. Aluminum alloy 1050A has one of the higher thermal conductivity values, 229 W/m-K, but has softer mechanical properties. Aluminum alloys 6060 and 6063 are commonly used and have thermal conductivity values of 166 and 201 W/m-K, respectively. these values depend on the tempered condition of the alloy.

Surface color

Radiant cooling may be an important factor in cases of low convection, such as flat finless panels with low airflow. Here, surface properties may be an important design factor. In the visible spectrum, matte black surfaces radiate more efficiently than shiny bare metal. Shiny metal surfaces have low effective emissivity due to their low surface area.

Thermal resistance

The heat flow between the semiconductor chip and the ambient air is modeled as a series of thermal flow resistances; from the core to the device enclosure, from the enclosure to the heat sink, and from the heat sink to the environment.

Heat sink efficiency

A heat sink can be thought of as a flat plate where heat flows at one end and dissipates into the surrounding fluid as it travels to the other end. As the heat flows through the fins, the thermal resistance of the heat sink that impedes the flow and the heat loss due to convection combine to lower the temperature of the fins, so the heat is transferred from the bottom of the fins to the end of the fluid.

Propagation resistance

Propagation resistance occurs when heat energy is transferred from a small area to a larger area in a substance with finite thermal conductivity. In a heat sink, this means that the heat is not evenly distributed through the bottom of the heat sink. The phenomenon of diffusion resistance manifests itself in how heat propagates from the location of the heat source and creates a large temperature gradient between the heat source and the edge of the Heat sink.

End Arrangement

A pin-fin Heat sink is a Heat sink with pins that protrude from the base. The pins can be cylindrical, oval or square. Pins are one of the more common types of heat sinks on the market today. The second type of heat sink fin arrangement is straight fins. They run the entire length of the Heat sink. A variation of the straight fin Heat sink is the cross cut Heat sink. Straight fin Heat sinks are cut periodically.

Foshan Liangyin Aluminum Products Co., Ltd. Mainly provide all kinds of high-precision extruded aluminum profile processing, communication parts processing, photoelectric parts processing, printing equipment parts processing, medical equipment, display, advertising machine aluminum frame processing, lighting profile processing, furniture bathroom profile processing, non-standard parts CNC Processing and custom CNC processing, etc., through strict quality control processes, to provide customers with stable and reliable products and services.

评论

发表评论

此博客中的热门博文

Comparing aluminum alloys for aluminum machining

图片
CNC machining is a versatile manufacturing process that is applicable to a wide range of materials. However, the process is more commonly used in the manufacture of products using aluminum, known as aluminum machining. Aluminum machining is a process that involves the use of aluminum in the manufacture of products because aluminum comes in a variety of grades. Aluminum is highly machinable and relatively inexpensive, and the different types of aluminum alloys are suitable for a myriad of machining applications. This includes rigid building components, aerospace parts manufacturing, and more.   In fact, the different types of aluminum alloys offer some unique and distinct advantages when used for machining. They offer a wide range of options, providing you with tremendous flexibility when starting a machining project. However, narrowing down the best aluminum alloy for the job also becomes more difficult. This guide attempts to provide a quick comparison of the five most common mach...
阅读全文

The Most You Need to Know about Aluminium for Machining

图片
Alum 6061 Aluminum 6061 is one of the most widely used alloy materials in machining due to its price, strength and versatility. Though Aluminum 2024 has a higher strength to weight ratio, it is not as corrosion resistant. The ability of  aluminum 6061  to withstand corrosion makes it economical because it doesn’t require finishing. Once exposed to the atmosphere, it develops a thin protective layer that protects it from surface rust. The combination of corrosion resistance and low weight make it an economical material to use in short production runs because parts can be created faster. In addition, it is chemical resistant and easy to machine. Parts that require multiple processes, such as machining and then welding, benefit from Aluminum 6061 because in addition to being easy to machine it is also weldable. Aluminum 6061 Tempers There are a variety of tempers for 6061 aluminum alloy, including: ►6061-F: No special treatment ►6061-O: Annealed, good for forming ►6061-T1: C...
阅读全文

How to Reduce CNC Machining Costs

图片
When it comes to CNC machining, planning is critical. Often, CNC machining designs and projects can become unnecessarily complex - and as with almost everything in life, time is money. At Liangyin, we understand that some designs require precise details that can't be simplified, but if you want to reduce costs and have the design flexibility to change design features, this blog post is for you. By understanding the CNC machining process and the factors that affect price, you can reduce the cost of your machining project while maintaining or improving functionality. Manufacturability is the level of complexity of the manufacturing process required to make a given part. In essence, the higher the manufacturability, the lower the cost. This blog post will review some of the key ways you can reduce the cost of  CNC machined parts  and enclosures.   Material Costs In machining, the harder the material, the more difficult it is to machine. This is because we must use less time ...
阅读全文