Feature ArticleBrazed Plate Heat Exchanger Applications in In-Rack CDU
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To achieve higher efficiency and lower energy consumption, next-generation data centers have widely adopted liquid cooling technology.
Data Center In-Rack CDU IntroductionAmong these solutions, the In-Rack CDU (Cooling Distribution Unit) is a highly efficient solution. It precisely transfers cooling capacity to high-density racks , and particularly when combined with hot and cold aisle containment systems, it maximizes cooling efficiency and energy savings. The In-Rack CDU effectively provides liquid cooling for server cold plates , while offering a compact dimension and efficient heat removal capabilities. |  |
Brazed Plate Heat Exchanger Applications in In-Rack CDU
In In-Rack CDUs, Brazed Plate Heat Exchangers (BPHEs) play a pivotal role, enabling efficient heat transfer to ensure servers maintain optimal operating temperatures in enclosed spaces. KAORI's BPHEs are suitable for In-Rack CDU applications , supporting cooling capacities of up to 250kW. They are a reliable choice for advanced modular rack infrastructures worldwide. The connectors and plates of KAORI's BPHE products are made of stainless steel , and 99.9% pure copper is used as the brazing material. The standard products can withstand a maximum working pressure of 30 bar (up to 140 bar upon request) , with a maximum working temperature of 200 °C , and are certified by CE(PED) / UL.
Flexible Flow ConfigurationData center designs are complex and varied, often imposing constraints on the integration space and connection methods for In-Rack CDUs. KAORI BPHEs offer diverse flow path arrangements and connector configurations, including parallel flow and diagonal flow, allowing our products to be flexibly adjusted and optimally arranged according to the specific space limitations and piping design requirements of customer In-Rack CDU modules. This high degree of customization not only simplifies system integration challenges and shortens design and deployment cycles but also ensures optimal fluid distribution and heat exchange efficiency, enabling In-Rack CDUs to better adapt to various rack configurations and provide customers with more flexible and efficient solutions. |
Supports Single-Phase and Two-Phase Cooling SystemsAs AI and HPC workloads continue to drive up chip power density, data center cooling systems are progressively evolving from traditional single-phase liquid cooling to more efficient two-phase cooling technologies. KAORI's brazed plate heat exchangers (BPHEs) possess excellent design flexibility and heat transfer performance, enabling stable and highly efficient integration into In-Rack CDU systems, whether for liquid-to-liquid cooling (single-phase) or liquid-to-vapor phase change (two-phase direct-to-chip, DTC) applications. This positions KAORI BPHEs as an ideal choice for supporting future high-thermal-density server architectures, providing In-Rack CDUs with greater design freedom and cooling potential to meet evolving thermal demands and ensure data centers maintain optimal operational status under various technological advancements.Excellent Heat Dissipation Performance and Robust DesignIn-Rack CDUs must directly handle high thermal loads from within the rack, demanding extremely high heat dissipation efficiency and long-term reliability from heat exchangers. KAORI BPHEs utilize a unique plate pattern design and precise brazing techniques to maximize heat transfer area and fluid turbulence, ensuring exceptionally high heat exchange efficiency. Furthermore, every KAORI product undergoes stringent quality control and testing, including burst pressure tests and rigorous lifetime tests , far exceeding industry standards. This effectively withstands system pressure fluctuations and thermal stress, ensuring that BPHEs maintain excellent performance and durability during prolonged, high-load operation, significantly reducing data center operational risks. |  |
Tailored Solutions
KAORI understands that every data center's cooling needs are unique. For In-Rack CDU applications, we possess extensive experience and a professional engineering team capable of providing diverse customized BPHE solutions, ranging from 80kW to 250kW , based on specific customer factors such as thermal load, space constraints, fluid type, and budget. This includes not only the selection of standard models but also optimized designs for specific performance
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