适用于相变浸没式液冷服务器系统的电子氟化液的材料兼容性研究

Material compatibility of electronic fluoride liquid for phase-changeimmersion liquid cooling server system

相变浸没式液体冷却技术由于冷却液与服务器系统直接接触,冷却液对系统的材料兼容性的好坏是决定液冷服务器系统的可实施性、维护成本和使用年限最重要的因素之一。本文选取一种全氟碳类电子氟化液(yl-10)作为相变浸没式液冷服务器系统的冷却液,通过加速老化的方法(在80℃恒温下),对服务器与3种纯度的氟化液(yl-10)的材料兼容性进行试验研究,并以试验前后氟化液色谱组分质量占比和试验样品质量、密度的相对变化量为指标对其材料兼容性进行评估。试验结果表明:不同纯度的yl-10与贴片电感器、非固体插装铝电容、PVC线缆和PET固体颗粒之间均表现出良好的材料兼容性;片式薄膜电阻器、低压低容陶瓷电容与纯度较高的yl-10材料兼容性良好,但与纯度较低yl-10材料兼容性较差,应优选较高纯度的yl-10作为浸没式液冷服务器的冷却液。简而言之,具有较高纯度的电子氟化液yl-10与以上器件材料表现出较为理想的材料兼容性。

For phase-change immersion liquid cooling technology,since the coolant contacts with the server system directly,the material compatibility of the coolant with the system is one of the most important factors determining the implement ability,maintenance cost and life of the liquid cooling server system.A perfluorocarbon electronic fluorinated liquid(yl-10)is selected as the coolant for the phase-change immersion liquid cooling server system.The material compatibilities of three purity fluorinated liquid(yl-10)with the server are experimentally investigated by accelerated aging(at a constant temperature of 80℃)and evaluated in terms of the percentage of the chromatographic components of the fluorinated liquid before and after the test,as well as the relative changes in the mass and density of the test samples.The experimental results show that yl-10 with different purities have good material compatibility with chip inductors,non-solid cartridge aluminum capacitors,PVC cables,and PET particles.The film resistors and low voltage&low capacity ceramic capacitors show good material compatibility with the yl-10 in higher purity,but poor with the yl-10 in lower purity.Higher purity yl-10 should be preferably selected as the coolant of the immersion liquid cooling server system.In short,yl-10 with high purity shows ideal material compatibility with the above materials.