氢气瓶疲劳检测实验舱温度控制系统设计

Design of temperature control system in test chamber for hydrogen cylinder fatigue detection

为了填补储氢气瓶在大温域跨度条件下的疲劳检测试验系统的研究空白,针对氢气瓶充放氢过程中存在的易燃易爆等风险特性设计了符合国家标准的氢气瓶疲劳检测实验舱温度控制系统,采用液体载冷进行间接温控,隔绝了电气设备与氢气瓶检测实验舱的直接接触,降低了爆炸风险,试验验证了系统可以实现实验舱内-40—85℃温度范围内的温度环境模拟和高精度控制,温度均匀度最高达±0.5℃,单点控制精度最高达±0.1℃,满足测试环境温度需求。

To fill in the blank of fatigue test systematic study for hydrogen cylinder under a large-span temperature,a temperature control system of which its technical parameters is in accordance with national standards was established for hydrogen cylinder to detecting its fatigue properties,avoiding the inflammable and explosive risk of hydrogen. An indirect system using secondary refrigerant was designed,the electrical equipment is separated with hydrogen circulation adopting partition walls,the risk of explosion was reduced. The actual experimental test show that the target temperature ranges from-40 ℃ to 85 ℃ in the simulated environment for hydrogen cylinder with high homogeneity and precision are realized,the temperature homogeneity can be up to± 0. 5 ℃ and the precision of single temperature was ± 0. 1 ℃,and it can fulfill the temperature requirement for hydrogen cylinder fatigue.