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本文介绍了依据冷量补偿原理建立的一种测试蓄冷器性能的装置。用二个平面旋转配气阀分别作系统的进气和排气阀,较好地解决了进、排气串气问题,可在较大范围变化切换周期。调节二个气流平衡阀使固体热阻上的差温值最小,保证了二路气流平衡,提高了测量精度。利用该装置在300～80K温度范围对填料为350目斜纹不绣钢丝网,空隙率0.703,流量范围0.2～25米~3/时的蓄冷器,不同切换周期(1秒上下)下的失效率～流量关系进行了初步试验。结果表明在液氮温区,高网目填料的传热系数比常温下低网目填料的传热系数在低温下的类推值可能稍高。
This article describes a device based on the principle of cold compensation to establish a test cooler performance. With two plane rotating valve were the system intake and exhaust valves, respectively, to better solve the intake and exhaust gas chain problems, can switch over a wide range of switching cycles. Adjust the two airflow balance valve so that the difference between the solid thermal resistance minimum temperature to ensure the balance of the two air flow and improve the measurement accuracy. Using the device in the temperature range of 300 ~ 80K for the packing is 350 mesh twill stainless steel mesh, the porosity of 0.703, the flow range of 0.2 ~ 25 m ~ 3 / hour when the regenerator, different switching cycles (1 second up and down) failure rate ~ Traffic relations conducted a preliminary test. The results show that the heat transfer coefficient of high mesh filler may be slightly higher than that of low mesh filler at low temperature at liquid nitrogen temperature.