How to reduce the local high heat of the data center cabinet

In a data center, there are numerous pieces of equipment. Despite the presence of advanced air conditioning systems, the internal temperature distribution is often uneven. Even with access air ducts installed—where both the front and rear of the cabinets have airflow paths—it can still be challenging to effectively remove heat from high-power devices. When such devices are concentrated in certain areas, local hotspots may form, posing risks to the safe operation of the data center and potentially causing damage due to overheating. Therefore, it's crucial to manage temperatures within the data center, aiming to eliminate or reduce these hotspots to ensure long-term stable operation of IT equipment and improve the overall environment. To address this issue, we first conducted an investigation into the current status. We identified seven main causes of local hotspots: mismatched airflow supply from perforated floors, gaps in U-spaces, spaces between adjacent cabinets, gaps at the bottom of cabinets, improper cooling capacity matching, incorrect hole density in cabinets, and aging equipment that fails to efficiently expel heat, leading to turbulence and increased pressure inside the cabinet. Next, we performed a feasibility analysis. The measured temperature inside a cabinet was 43.8°C, which exceeds the industry standard of 35°C ± 5°C by 3.8°C. Various solutions were considered for reducing the temperature, including using manual dampers, blind plates, screens, enclosures, increasing cooling capacity, opening cabinet doors, and installing blowers. Each solution showed potential improvements ranging from 2°C to 4°C. Based on our findings, we proposed several solutions to address local hotspots: using guided ventilating plates and manual dampers to direct cold airflow, blocking idle U positions, sealing gaps between cabinets, preventing hot air from recirculating, ensuring proper cooling capacity matching, adjusting perforated floor openings, and increasing airflow through heat sink units. We also tested customized fans to enhance airflow and reduce local overheating. The results showed a significant decrease in temperature, especially when fans were installed at the outlet. Thermal imaging before and after fan installation confirmed the effectiveness of this approach. In conclusion, eliminating local hotspots not only ensures equipment safety but also supports the development of a green and efficient data center. It's essential to analyze each situation carefully and implement tailored solutions to maintain a stable and energy-efficient environment.

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