Advantages:
The advantage of water cooling is that vibration and noise are less than air cooling, because the number of water cooling fans is less than air cooling, and the heat dissipation effect is much higher than air cooling system.
The advantage of air cooling is that the equipment foundation can only do sound insulation and vibration isolation measures, and no special computer room is needed. Small floor space and low requirements for placement. In winter, as long as the water is drained clean, it can be placed in the open air.
2. Disadvantages:
The disadvantage of water cooling is that the water-cooled radiator needs a lot of electrical appliances, which leads to a larger area for placing equipment and a higher price than the air-cooled system. Because the structure of water cooling system is more complicated than that of air cooling system, and the primary working medium is added, the reliability of water cooling system is poor.
The disadvantage of air cooling is that the total motor power of air cooling unit is greater than that of water cooling system, which leads to the increase of urban power supporting fee and capacity increase fee. Because the fan technology is skilled, the noise and vibration are relatively large during use. The refrigeration performance is not as good as that of water cooling system.
Extended data
Application of air cooling;
Air cooling is used to cool the internal combustion engine, especially the internal combustion engine of aircraft, because the cooling liquid should be available at any time and the temperature should be appropriate to ensure efficient cooling. Several internal combustion engines together are called water-cooled internal combustion engines. Usually, air passing through radiators or heat exchangers is used to cool their coolant.
Cars with direct air-cooled engines are rare. One of the most common examples is the horizontal-to-horizontal engine widely used by Porsche. Famous old models include Volkswagen Beetle and related models Citroen 2CV, Chevrolet colville and Porsche 9 1 1.
Engine gas turbine engine (such as turbofan engine, turbojet engine, etc.) )) includes a turbine, which can exhaust the hot gas in the combustion chamber. If necessary, lower temperature air will be introduced from the compression system to cool the turbine rotor blades to prevent them from melting.
Air cooling technology is widely used in CPU heat dissipation, because the CPU processor of a computer will generate a lot of heat, and if it is not cooled in time, it will damage electronic components such as CPU. In this case, air as an insulator is also one of its advantages.
In many industrial processes, air is needed as a direct or indirect cooling medium. Air conditioning is a common air treatment process, which is used in a house or the whole building. It can cool the air and make residents in a comfortable environment. The air is usually cooled by quench water or salt water, and then the heat is transferred to the outside through the medium, and the heat is usually discharged to the atmosphere by a water-gas heat exchanger driven by a fan.
Working principle of water cooling
The water cooling block is a metal block with water channels inside, which is made of copper or aluminum. When it touches the CPU, it will absorb the heat of the CPU. So the function of this part is the same as that of air-cooled radiator. The difference is that the water cooling block must have a water channel through which the circulating liquid passes, and it is completely closed to ensure that the circulating liquid will not leak out and cause electrical short circuit.
The function of circulating liquid is similar to air, but it can absorb a lot of heat and keep the temperature unchanged. If the liquid is water, it is a well-known water cooling system.
The function of the water pump is to push the circulating liquid to flow, so that the liquid absorbing CPU heat flows out of the water cooling block on the CPU, and the new low-temperature circulating liquid continues to absorb CPU heat.
The water pipe connects the water pump, the water cooling block and the water tank, and its function is to make the circulating liquid circulate in a closed channel without leakage, thus making the liquid-cooled heat dissipation system work normally.
The water tank is used to store circulating liquid, and the returned circulating liquid releases the heat of CPU here, and the circulating liquid with low temperature flows into the pipeline again. If the heating power of CPU is small, the large-capacity circulating liquid stored in the water tank can ensure that the temperature of circulating liquid will not increase obviously.
If the CPU is powerful, it is necessary to add a heat exchanger to help the CPU dissipate heat. Here, the heat exchanger is a bit like a radiator. The circulating liquid transfers heat to the heat sink with large surface area, and the fan on the heat sink takes away the heat flowing into the air.
Reference: Baidu Encyclopedia-Air Cooling
Reference: Baidu Encyclopedia-Water Cooling