Is the water-cooled heat dissipation row better for copper row or aluminum row?

The best effect of water-cooled radiator is aluminum.

The reason is that the current all-copper water-cooled radiator needs to be welded with tin during processing. Although the thermal conductivity of aluminum is lower than that of copper, which is only 6% of that of copper, the thermal efficiency of aluminum radiator is higher than that of copper radiator due to the existence of tin protective layer with lower thermal conductivity between copper radiator water pipe and radiator fin according to Cannikin Law. In addition, if the welding process is not completed in one process, the welding rate will be reduced, and the surface painting treatment specially added by copper materials for oxidation resistance increases the thermal resistance of all-copper water-cooled rows, so the efficiency of most all-copper folded water-cooled rows has not yet reached the truly ideal state. As we all know, aluminum is the most difficult to weld, and with the conquest and popularization of advanced aluminum brazing technology, aluminum radiator can be welded at one time with a welding rate of 1%, and aluminum is used as the welding medium, so the overall heat dissipation efficiency of all-aluminum radiator is definitely better than that of tin-welded copper water-cooled radiator.

due to the differences in welding equipment and process methods adopted by copper and aluminum radiators, the structural strength of their products is quite different. The aluminum radiator is brazed, and the welding temperature is 577 ~ 612℃, while the copper radiator is soldered, and the welding temperature is below 45℃. The shear strength of welded joint of aluminum radiator is 5 ~ 58 MPa, the tensile strength is 86 ~ 96 MPa, and the torsional strength of solder joint of copper radiator is 34 ~ 37 MPa. Therefore, the structural strength of aluminum radiator is much higher than that of copper radiator. Therefore, the reliability of aluminum radiator is much higher than that of copper radiator.

in addition, because a small amount of heating copper flux will remain in the inner waterway during the welding process of all-copper heat exchanger, the efficiency of the heat exchanger will be reduced without advanced inner waterway flushing technology, and there are no similar defects in the treatment process of the inner waterway and the surface of water-cooled fins, so overall, from the aspect of improving the process, At present, the all-aluminum water-cooled row is indeed superior to the tin-welded all-copper cold row in many aspects.

The fact that the aluminum radiator is inferior to the copper radiator in terms of corrosion resistance and the use conditions of the radiator are stricter than that of the copper radiator. It is mainly necessary to use special heat-conducting liquid. Other media such as water cannot be used. Compared with copper radiator, the trouble-free mileage of aluminum radiator is much higher than that of copper radiator under the same conditions.

finally, let's take another example: from the structural analysis of all the high-end air-cooled cooling systems at present, copper is used for heat conduction, including that the lower part of the radiator contacts the heat pipe, and the main cooling part is aluminum, and finally the fan is used as an aid to blow away the heat. This is the principle of the cooling system, not the question of the price of materials. Similarly, in the water cooling system, the principle of heat dissipation row is the same, and you want heat dissipation instead of heat conduction. This is why all brand manufacturers use aluminum to make heat sinks.