当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2013年
11期
1608-1610
,共3页
保冷层%LNG%温度场%数值模拟
保冷層%LNG%溫度場%數值模擬
보랭층%LNG%온도장%수치모의
Cold-keeping layer%LNG%Temperature field%Numerical analysis
建立了 LNG 管道非稳态传热模型，对环境温度、保冷层厚度及对流换热系数三方面的温度变化进行了数值分析。研究结果表明：随着环境温度的增加，温度变化逐渐增大；随着保冷层厚度的增加，同一厚度下温度逐渐增大，温度变化梯度减小；空气对流换热系数与LNG对流换热系数对温度变化均不敏感。
建立瞭 LNG 管道非穩態傳熱模型，對環境溫度、保冷層厚度及對流換熱繫數三方麵的溫度變化進行瞭數值分析。研究結果錶明：隨著環境溫度的增加，溫度變化逐漸增大；隨著保冷層厚度的增加，同一厚度下溫度逐漸增大，溫度變化梯度減小；空氣對流換熱繫數與LNG對流換熱繫數對溫度變化均不敏感。
건립료 LNG 관도비은태전열모형，대배경온도、보랭층후도급대류환열계수삼방면적온도변화진행료수치분석。연구결과표명：수착배경온도적증가，온도변화축점증대；수착보랭층후도적증가，동일후도하온도축점증대，온도변화제도감소；공기대류환열계수여LNG대류환열계수대온도변화균불민감。
A transient heat transfer model of LNG pipeline was established,and numerical analysis of temperature change with ambient temperature,insulating layer thickness and convective heat transfer coefficient was carried out. The results show that, the temperature change increases gradually with the increase of ambient temperature; as the thickness of cold-keeping layer increases, the temperature increases gradually and temperature change rate decreases under the same cold-keeping layer thickness. Both coefficient of air convection heat transfer and coefficient of LNG convection heat transfer are insensitive to temperature change.
