摘要
用液氮为试验工质,对3个具有相同结构的35m3高真空多层绝热容器在不同地点进行了日蒸发率试验,对试验中得到的蒸发量与环境温度和环境压强的变化关系进行了分析,认为环境温度的波动虽然是容器内蒸发量波动的内因,但表观蒸发量的波动受大气压变化的影响更大,呈即时的相反关系。同时认为,为了能更真实地反映容器内的实际蒸发率值,应结合气压曲线,对有效测试时段内的总流量取平均值来计算蒸发率,以消除环境波动的影响。
The daily evaporation rate experiment was done in different locations using liquid nitrogen as working substance in three same cryogenic vessel of 35 m3 with high-vacuum multi-layer insulation. The experiment data on transient evaporation and ambient temperature and pressure were analyzed. The result shows that although the ambient temperature fluctuation causes the fluctuation of evaporation quantity in in- ternal of vessel, the ambient pressure give more influence on the apparent evaporation quantity, showing the anti-related relationship. In order to reflect the actual evaporation rate of vessel more realistically, pressure curve should be considered to calculate the evaporation rate by the average value of the total flow within the effective test period to eliminate the influence of environmental fluctuation.
出处
《低温工程》
CAS
CSCD
北大核心
2010年第2期42-45,59,共5页
Cryogenics
关键词
蒸发率测试
蒸发率波动
低温压力容器
evaporation rate test
evaporation fluctuation
cryogenic pressure vessel
