What are the requirements for heat dissipation when customizing PS cabinets?

When customizing PS cabinets, the heat dissipation requirements are mainly reflected in two aspects: heat dissipation mode and ventilation channel design:

First, the heat dissipation mode

Natural heat dissipation

Ventilation hole design: If the power and calorific value of the equipment in the cabinet are low, natural heat dissipation can be adopted. Vents are provided at the top, bottom and side of the cabinet. The area of ventilation holes should be calculated according to the calorific value of the equipment. Generally speaking, the total area of ventilation holes should not be less than 10%-15% of the surface area of the cabinet. For example, for a cabinet with a surface area of 10 square meters, the ventilation hole area should be at least 1-1.5 square meters. These vents allow air to naturally convection and take away the heat generated by the equipment in the cabinet.

Dust-proof net installation: Dust-proof net should be installed in ventilation holes to prevent dust from entering the cabinet. Dust accumulation on equipment may affect the heat dissipation effect and even lead to equipment failure. The mesh size of the dustproof net should be moderate, which can effectively block the dust without causing too much obstruction to the air circulation.

air blast cooling

Selection and layout of fans: For PS cabinets with high power and high calorific value, forced air cooling is needed. Install fans (generally axial fans) in the cabinet, and the number and position of fans should be rationally arranged according to the heat distribution inside the cabinet. For example, if the heat source is concentrated in the upper part of the cabinet, fans can be installed at the bottom and middle of the cabinet, and fans can be installed at the top. The air volume and wind pressure of the fan should meet the cooling requirements of the cabinet, and the noise level of the fan should be considered. Generally, the noise should be controlled below 60dB to avoid noise pollution to the surrounding environment.

Redundant design: Considering that the fan may fail, it is better to have redundant design. For example, with a dual-fan system, when one fan fails, the other fan can still maintain the basic heat dissipation function, ensuring that the equipment in the cabinet will not be damaged due to overheating.

Second, the ventilation channel design

Air flow path planning

It is necessary to build a reasonable ventilation channel inside the cabinet, so that cold air can enter the cabinet from the bottom or side, and be discharged from the top after heat dissipation by the equipment. This can form a good heat exchange path. For example, an air inlet is set at the bottom of the cabinet. After cold air enters, it will pass through the bottom of the equipment, absorb heat, then rise and be discharged from the exhaust port at the top.

Equipment spacing requirements

Keep a certain distance between devices (generally not less than 50mm) to ensure good ventilation. Sufficient spacing can allow air to flow around the equipment and take away heat. If the equipment is installed too tightly, the air flow will be blocked, which will lead to local overheating.

Channel unblocked guarantee

There should be no obstacles in the ventilation channel to avoid affecting air circulation. When customizing the cabinet, it is necessary to plan the internal wiring reasonably to prevent objects such as cables from blocking the ventilation passage. At the same time, the installation position of some auxiliary equipment (such as small transformers, etc.) should also consider its influence on ventilation to ensure that the whole ventilation channel is unimpeded.