Views: 92 Author: Site Editor Publish Time: 2020-03-17 Origin: Site
The computer's CPU and other components generate heat during high-speed operation. Heat dissipation is actually a process of heat transfer. The purpose is to bring the heat generated by the CPU to other media and control the temperature of the CPU within a stable range.
The purpose of CPU heat dissipation is to bring the heat generated by the CPU to other media and control the temperature of the CPU within a stable range. The heat of the CPU is ultimately dissipated into the air, and the heat transfer process between them is the role that the heatsink plays.
Most heat sinks dissipate heat by means of heat conduction and convection. According to the different means of thermal conduction and thermal convection, the heatsink products can be divided into active and passive ones. The active means that energy that is not related to the heating body participates in cooling, such as fans, water pumps in liquid cooling, and compressors in phase change refrigeration. These cooling methods are generally characterized by high efficiency, but also require other energy sources. In contrast, the meaning of passive is easy to understand, that is, only relying on the self-divergence of the heating body or the heat sink to cool down.
Due to the low implementation cost, the use of fans for air cooling is the most common cooling technology in our lives. This method is relatively simple to manufacture, and only needs to use a fan to take away the heat absorbed by the radiator. Now the price is relatively low, and the installation is simple. A high air volume fan and a heat sink with high thermal conductivity material can form a good CPU air-cooled radiator. Due to the above advantages, air cooling is the most commonly used method nowadays.
The basic structure of a traditional air-cooled radiator is divided into three parts, including fan, buckle, and heat sink. Among them, the heat sink technology is the most important. It involves materials, processes, structures, and so on. It is also the part we always focus on. The performance of the fan cannot be ignored, including factors such as air volume, wind pressure, noise, and service life.
Liquid cooling system is generally composed of the following parts including heat exchanger, circulation system, water tank, water pump and water, and heat dissipation structure can be added as required. Water has no better thermal conductivity than metal because of its physical properties, but flowing water will have excellent thermal conductivity. In other words, the cooling performance of the water-cooled radiator is directly proportional to the flow rate of the cooling liquid, and the flow rate of the cooling liquid is related to the power of the water pump of the refrigeration system. Moreover, the specific heat capacity of the water is large, which makes the water-cooled refrigeration system have a good heat load capacity. Equivalent to 5 times the air-cooled system, the direct benefit is that the CPU operating temperature curve is very smooth. For example, when a system using an air-cooled radiator is running a program with a large CPU load, a thermal spike in temperature may occur in a short period of time, or it may exceed the CPU warning temperature, while a water-cooled cooling system has relatively small thermal fluctuations due to its large heat capacity.
