Selection, Installation, and Usage Instructions for Aluminum Extrusion Heat Sinks
Category： Industry News
In electronic products, including large-scale machinery and equipment, heat dissipation is a critical component or workpiece. Currently, the standard practice is to use matched aluminum extrusion heat sinks; however, some users opt to purchase high-quality aluminum extrusion heat sinks on their own. So, what key considerations should be taken into account when selecting an aluminum extrusion heat sink?
In electronic products, including large-scale machinery and equipment, heat dissipation is a critical component or workpiece. Currently, the common practice is to use matched aluminum extrusion heat sinks; however, some users choose to purchase high-quality aluminum extrusion heat sinks on their own. So, what key considerations should be taken into account when selecting such heat sinks?
Five Considerations When Purchasing Aluminum Extrusion Radiators
I. When selecting steel radiators, pay attention to internal corrosion protection.
Cast-iron radiators are being phased out, with steel radiators—such as column and panel types—taking their place. However, aluminum extrusion radiators currently offer the best corrosion resistance.
In addition, some radiator manufacturers on the market are vigorously promoting the claim that their products “have no welds.” In fact, this does little to enhance the corrosion resistance of radiators. This is because corrosion in steel radiators does not typically occur at the welds; rather, it is determined by the fundamental corrosion mechanisms inherent in steel radiators. Therefore, “having no welds does not mean there is no corrosion.”
II. Cast Iron Radiators Are Phasing Out of the Market
Cast-iron radiators have long been the dominant product in the Chinese market due to their low cost and excellent corrosion resistance. However, because they frequently incorporate steel fittings, they are prone to corrosion and leaks, leading to their gradual phase-out in recent years.
III. The procurement location is also very important.
After-sales service guarantees vary depending on the procurement location; therefore, aluminum extrusion heat sinks should always be purchased from the manufacturer’s place of origin or from suppliers that offer reliable after-sales support.
IV. Copper-aluminum composite materials may also corrode.
Copper–aluminum composite radiators have also become a relatively common type of modern radiator in recent years; they are convective radiators composed of copper tubes and aluminum alloy extrusions. In general, copper exhibits superior resistance to oxidation and corrosion compared with steel, making it a safer choice that consumers can select with confidence. However, corrosion can still occur under certain specific conditions, and responsible manufacturers should therefore warn consumers accordingly. For example, the “Sende Copper-Core Jie” copper–aluminum composite radiator explicitly states in its product documentation: “In open, non-pressurized boiler systems, as well as in systems with high levels of sludge or those that use certain chemical deoxidizers such as sodium sulfite, corrosion may still occur.”
V. Do not mix aluminum extrusion radiators with other materials.
Currently, aluminum-profile radiators on the market are mainly of two types: high-pressure extruded and drawn-aluminum alloy welded. In the Chinese market, welded aluminum-profile radiators are predominant; however, their weld joint strength is often unreliable, making them prone to failures and leaks. Therefore, consumers should exercise caution when making their selection. In addition, experts advise consumers that, unlike steel, aluminum-profile radiators are not suitable for use in alkaline water systems; thus, they should be installed separately and not mixed with other materials.
In addition to selecting the right aluminum-profile radiators, it is also important to address the issue of air bleeding after installation and commissioning. During the trial heating period, as hot and cold water alternate, residual air may remain in the radiator pipes or within the heating system itself. In such cases, it is necessary to distinguish among different scenarios and bleed the air accordingly. If all neighboring units are warm except one, particularly when that unit is on the top floor, the problem may be due to rust or malfunction of the automatic air vent on the electronic radiator. If rooms on other floors are not warm, the issue could stem from a faulty air-bleed valve on the indoor profile radiator or from problems with the inlet and outlet valves inside the room. And if the heating system fails to provide warmth throughout an entire building or even a single apartment unit, the root cause may lie with the main inlet valve serving the building.
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