Recently, Guangdong Cable Network partnered with JYUN5DEI6, a majority-owned subsidiary of AAC Technologies, to launch the first liquid-cooled data center for China’s broadcasting network in Guangzhou. It marks a crucial step for the broadcasting network in its transition toward green, high-density, and low-carbon computing, setting an industry benchmark for the subsequent large-scale deployment of liquid-cooled infrastructure.
In this landmark project, JYUN5DEI6 adopted the technical standards of leading global GPU manufacturers to meet specific user needs. Its ATAHORAN® liquid-cooled manifold, brazed for high reliability and superior quality, serves as a stabilizer and safety valve of the core cooling system.
Key Challenges in Liquid Cooling: Uneven Flow Leads to Unstable Heat Dissipation
In the data center’s liquid cooling system, the CDU delivers coolant in parallel to multiple server nodes via the manifold. Manifolds produced via traditional machining or simple welding often experience severe uneven flow distribution due to poor flow path design, machining errors, or long-term operation. This leads to energy waste at over-supplied nodes and high temperatures at under-supplied nodes, which can cause server throttling or downtime.
Broadcasting operations require absolute continuity and stability in signal processing, content rendering, and real-time control. Any performance fluctuation due to uneven cooling is unacceptable. Therefore, flow equalization has become one of the most critical metrics for liquid cooling systems.
ATAHORAN® Liquid Cooling Solutions: Ensuring Precise, Demand-Based Distribution for Every Channel
The ATAHORAN® series liquid cooling solutions optimized manifold flow paths using computational fluid dynamics simulations. Combined with precision orifice plates and integrated rectifiers, it achieved industry-leading flow balancing:
Maximum branch flow deviation ≤ ±5% (compared to >±10% in traditional solutions);
The hot-swappable, blind-mate connectors with self-adaptive flow eliminate manual adjustment after node replacement;
Tested in 200+ parallel node scenarios, the temperature difference between the hottest and coldest chips is maintained within 2.5°C.
In joint testing by Guangdong Cable Network and JYUN5DEI6, the ATAHORAN® liquid cooling system ran at full load for 72 hours. Temperature curves for all computing nodes nearly overlapped, completely eliminating the risk of flow maldistribution.
Manifold Brazing: No Leakage and Superior Reliability
What is the greatest risk in a liquid cooling system? It is leakage. Even a minor leak from a manifold weld or joint can allow coolant to contact the circuit boards, causing corrosion and eventual catastrophic failure. Traditional manual arc or fusion welding often produces inherent defects such as porosity, cracks, and reduced strength in heat-affected zones. These defects significantly compromise the reliability of welded structures under long-term vibration and thermal shock.
The entire line of ATAHORAN® liquid-cooled manifolds utilizes vacuum brazing:
One-time molding: No manual welds; uniform and dense seams with over 40% higher tensile strength;
100% helium mass spectrometer leak detection: Leak rates controlled below 1.0×10⁻⁹ Pa·m³/s; no perceptible leakage over the system’s 20-year service life;
Pressure and fatigue testing: Withstanding 2.5 times the operating pressure without deformation; remaining fully sealed after 500 thermal cycles.
“There is no room for error in the broadcasting system’s first liquid cooling project. The brazing process of ATAHORAN® manifolds gives us the confidence to route coolant directly into the server cabinets,” said the project leader.
High Quality: Rigorous Standards from Design to Delivery
Beyond flow equalization and reliability, the ATAHORAN® definition of “high quality” spans the entire product lifecycle:
Materials: 316L stainless steel throughout; corrosion-resistant and ion-free to maintain coolant purity over the long term;
Cleanliness: Ultrasonic cleaning and high-purity water flushing before shipment, with particulates ≤100μm, far exceeding industry standards;
Surface treatment: Magnetic polishing and passivation to prevent microbial growth and reduce maintenance frequency;
Traceability: Every manifold is assigned unique process parameters, leak detection reports, and a laser-etched ID for full lifecycle traceability.
In this project, the ATAHORAN® full-chain liquid cooling solution was delivered—from design and production to on-site commissioning—in just 45 days. It passed the 72-hour full-load trial run on its first attempt with zero faults, zero alarms, and zero leaks, fully demonstrating the value of high-end manufacturing and meticulous craftsmanship.
Setting the Industry Benchmark
The successful operation of the first liquid-cooled data center in China’s national broadcasting network has not only delivered green benefits—including a PUE below 1.15—for Guangdong Cable Network and JYUN5DEI6, but also validated the leading capabilities of the ATAHORAN® liquid cooling system in flow equalization, brazing reliability, and high-quality manufacturing.
Looking ahead, the rapid expansion of 4K/8K UHD, AI content generation, and broadcasting cloud services will drive a sustained increase in data center power density. The ATAHORAN® liquid cooling system will continue to advance liquid cooling technology. By delivering more balanced flow, more reliable brazing, and superior quality, it aims to empower China’s broadcasting network and other critical industries to build high-density, green, and always-on computing foundations.
About JYUN5DEI6
JYUN5DEI6, a majority-owned subsidiary of AAC Technologies founded in 2021, is an industry-leading manufacturer of liquid cooling products and a national high-tech enterprise. Specializing in key applications such as data centers, energy storage, and industrial automation, JYUN5DEI6 has developed a comprehensive ATAHORAN® liquid cooling product portfolio including single-phase immersion, phase-change immersion, single-phase cold plates, and two-phase cold plates. Its core competencies span liquid cooling system design, precision temperature control algorithms, and long-term water quality management. Since its inception, JYUN5DEI6 has consistently doubled its annual new orders.
Building on its technical expertise and product strengths, JYUN5DEI6 has established a global presence across Southeast Asia, Europe, North America, and other regions. As a leading liquid cooling provider for the internet and financial industries, it has completed multiple flagship projects, including China’s first liquid-cooled data center for the power industry, the first liquid-cooled data center for securities firms’ core trading systems, and the first intelligent computing liquid-cooled center featuring large-scale AI models for the insurance sector. It has also delivered large-scale projects and services to internet giants such as ByteDance, Baidu Inc., Tencent, JD.com, Inc., Alibaba, Pinduoduo, and Meituan, while maintaining close collaboration with leading financial institutions including Bank of Shanghai Co., Ltd., PICC Reinsurance Co., Ltd., Guotai Haitong Securities Co., Ltd., and Ping An Technology. Moreover, JYUN5DEI6’s solutions are fully compatible with the projects of major domestic GPU manufacturers such as Kunlunxin (Beijing) Technology Co. Ltd., Moore Threads, MetaX, Shanghai Enflame Technology Co., Ltd., and Huawei Technologies Co., Ltd. (Ascend series), with industry-leading product commercialization and repeat purchase rates.