How can the ventilation openings of an energy storage system's PCS (Pressure Process Control System) balance heat dissipation and shielding?

The ventilation openings of PCS cabinets are one of the main channels for electromagnetic leakage, and both heat dissipation requirements and shielding effectiveness must be considered. The solution is to install electromagnetically shielded ventilation windows at the ventilation openings. These windows are typically composed of multiple layers of staggered metal waveguides or metal honeycomb cores. The principle is that the aperture size of the waveguide or honeycomb structure is designed to have high attenuation characteristics for electromagnetic waves above the cutoff frequency, effectively blocking the passage of electromagnetic waves while allowing free airflow.

Selection and installation points:

1. Determine the waveguide aperture size based on the highest frequency to be shielded.

2. Ensure a low-impedance continuous conductive connection between the metal frame of the shielding window and the cabinet panel, typically using conductive gaskets.

3. Clean regularly to prevent dust blockage affecting ventilation. Additionally, optimizing the airflow design by placing the ventilation openings in low-field areas on the side or bottom of the cabinet can reduce direct leakage.