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设计一套超高压的氮气和氩气供气系统。其目的是提供超过lOOMpa超高压的氮气和氩气气源,并满足常规的高压气源需求,同时提供了功能先进的气体纯度在线检测,超高压力的在线检测和计算机控制功能,并有单独的模块单元,可以对氮气和氩气进行适合比例的混合。 相似文献
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本文将多层矩形微槽道与焦汤制冷器两种结构结合制作了多层微槽道J-T效应制冷器,回热段设置高低压矩形通道各三层交叉叠放。以氮气为制冷剂,采集其在多层微槽道J-T节流制冷器各测点温度,分析氮气在制冷系统各阶段的降温特性,对比氮气与氩气在微槽道J-T效应制冷器中的实验结果。结果表明:当进口压力为4~8 MPa时,随着压力的增大,氮气冷端温度越低,达到稳定冷端温度的时间越短;当进口压力为8 MPa时,氮气冷端在200 s左右趋于稳定温度约1.7℃;在相同进口压力下,氩气冷端温度低于氮气,但氮气达到冷端温度的时间比氩气更短;进口压力为7 MPa时,氮气冷端温度稳定时间比氩气提前约450 s;进口压力8 MPa的氮气与4~5 MPa的氩气温降相近,且氮气的降温时间更短,可以考虑用氮气代替氩气以减少制冷成本。 相似文献
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Su-xx光学雷达节流制冷器的优化设计 总被引:1,自引:0,他引:1
Su-xx光学雷达节流制冷器是用来冷却Su-27等机载雷达红外芯片的,它的性能优劣将直接关系到光学雷达搜索目标的效果。通过对国外同类型节流制冷器的研究分析,利用节流制冷原理建立了节流制冷器热交换器热负荷的数学模型,采用Delplli5.0编制的惩罚函数法等优化设计软件对其进行了计算分析,在给定的空间结构范围内得出了该热交换器的最优解,经过对比,实验验证了经优化设计后节流制冷器的性能明显提高,为今后节流制冷器的设计找到了一条切实可行的方法。 相似文献
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在新建23500 m3/h空分设备制氩系统调试过程中,由于气体需求量不稳定,制氩系统运行工况一直处于波动状态。文章简介了23500 m3/h空分设备设计工况下的产品指标,详细分析了氩馏分中氮含量升高、氩馏分中氩含量波动大以及氩馏分中氩含量较低情况下出现氮塞故障的原因,介绍了相应的调整措施。 相似文献
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The performance of a small thermoacoustic Stirling heat engine (TASHE) was investigated with three kinds of working gases experimentally and numerically. The examined performances focused on the operating frequency, onset temperature, pressure amplitude and some temperature characteristics after onset. The working frequency with nitrogen, argon and helium as the working gas was 45 Hz, 42 Hz and 130 Hz, respectively. The engine worked with helium in a much wider range of mean pressure than with nitrogen and argon. There was an optimal mean pressure for the minimum onset temperature for each working media. Using nitrogen and argon as working gas rather than helium, another optimal mean pressure for the highest pressure ratio was obtained in the experiment. The loop dimension was indispensable in determining the frequency and the highest pressure ratio was observed in the resonator cavity. 相似文献
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由于投用液氩贮槽气相回精氩塔阀,导致参与精氩塔精馏的气体氮含量偏高,从而发生精氩塔氮塞。通过减量生产,并采取相应操作,系统工况恢复正常。 相似文献
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南钢制氧厂30000 m3/h空分设备的1000 m3低温液氩贮槽配备了氩气回收系统,但启用后造成了1000 m3低温液氩贮槽被污染和精氩塔氮含量偏高的事故,检修并改造管路系统后氩气回收系统运行正常。介绍氩气回收系统的流程和管路检修、改造方案。 相似文献
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因受实际条件限制,将经过改造的液氮汽化系统的汽化氮气用作空分设备安装时的试压、查漏气源和启动时的仪表气源。进行了改造可行性分析,介绍了具体的改造方案和效果,达到节约设备投资、缩短空分设备启动时间的目的。 相似文献
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《低温学》2017
Periodic and spontaneous on-off oscillation belongs to the onset and damping behaviors of thermoacoustic engines, and investigations on this phenomenon lead to better operation of the thermoacoustic engines with stable performances. In this paper, the quasi- periodic on-off oscillation in a small-scale traveling wave thermoacoustic heat engine with a resonator length of only 1 m was experimentally investigated. The type of working media, mean pressure and the input heating power are the main operating parameters, which significantly affect the formation of the periodic on-off oscillation. The experimental results demonstrated there was a critical charge pressure over which the periodic on-off oscillation could happen. For the small- scale engine with helium gas as the working media, the mean pressure threshold value was about 1.4 MPa and the on-off oscillation occurred with a single frequency. Using nitrogen and argon gas as the working media, the on-off oscillation was not observed. The reason was qualitatively analyzed as well. 相似文献
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含气率对AP1000核主泵影响的非定常分析 总被引:1,自引:0,他引:1
为研究含气率对核主泵内部各点压力影响规律及不同泵进口含气率时气体在核主泵内的分布情况,在对核主泵进行水力设计与三维建模基础上,采用CFD技术对核主泵失水事故气液两相流工况进行瞬态数值模拟。通过模拟不同泵进口含气率时核主泵内部流动的瞬态特性,研究泵进口含气率对泵内各点压力的影响规律及气体分布。结果表明,泵进口含气率增大泵内各点压力随之降低;含气率小于0.1时其对监测点压力脉动主频振幅影响不大,且泵内气体聚集现象不明显;含气率大于0.2后监测点压力脉动主频振幅稍有下降,且泵内开始出现明显的气体聚集现象。 相似文献