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真空-粉末绝热
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In the paper, the theoretical analyses and experimental researches on heat transfer process in the evacuated powder insulation with squat aluminium-coated flakes additive are carried out. With the fundament of heat transfer formulae of evacuated powder insulation, the formulae for the thermal conductivity and radiation extinction coefficient of evacuated powder insulation with squat aluminium-coated flakes additive are deduced. It is proven that, by use of the deduced formulae, the calculated results of the...

In the paper, the theoretical analyses and experimental researches on heat transfer process in the evacuated powder insulation with squat aluminium-coated flakes additive are carried out. With the fundament of heat transfer formulae of evacuated powder insulation, the formulae for the thermal conductivity and radiation extinction coefficient of evacuated powder insulation with squat aluminium-coated flakes additive are deduced. It is proven that, by use of the deduced formulae, the calculated results of the effective thermal conductivity coincide with experiments.

本文对加有四方镀铝箔片的真空粉末绝热结构中的传热过程进行了理讨分析和实验研究。在真空粉末绝热结构传热计算式的基础上,对加四方镀铝箔片的真空粉末绝热的导热系数和辐射衰减系数进行了推导和修正。结果表明,有效导热系数的计算值同试验值相一致。

Cryogenic tank is an important equipment in the gas liquefying and Separating process.Design of the thermal insulation is a necessary pa-rt of developing the cryogenic tank,Also,it affects the performance of cryogenic tank directly,Under the condition of the normal or vacuumpow-der thermal insulation and the constant temperature defference of heat leak,the profiles provided show the relation between the evaporativity per day and the effective thermal conductivity of thermal insulation structure as well as the...

Cryogenic tank is an important equipment in the gas liquefying and Separating process.Design of the thermal insulation is a necessary pa-rt of developing the cryogenic tank,Also,it affects the performance of cryogenic tank directly,Under the condition of the normal or vacuumpow-der thermal insulation and the constant temperature defference of heat leak,the profiles provided show the relation between the evaporativity per day and the effective thermal conductivity of thermal insulation structure as well as the thickness of thermal insulution layer of the tank;which can be used to simplify design of the tank and to compare the performan-ce of the tank conveniently.

低温容器是气体液化分离加工工业中的重要设备。绝热设计是低温容器设计的重要组成部分,它直接影响低温容器的日蒸发率。在不同的绝热材料和一定漏热温差的条件下,给出了普通绝热和真空粉末绝热型低温容器的日蒸发率与绝热材料的有效导热系数以及绝热层厚度之间的关系曲线。为简化设计和比较低温容器的特性提供方法和依据。

This artical describes the development process of 2O0 m ̄3 vacuum powder insulated spherical cryogenic liquid storage tank. The product was put into use in 1994 with normal and reliable operation.All its performance indexes have been proved to meet the design requirements through the testing by th Gas Separation and Liquefication Equipment Product Quality Supervision Center of the Ministry of Machine Building Industry. The success of the product fills up the gap in the domestic field.Its liquid nitrogen daily...

This artical describes the development process of 2O0 m ̄3 vacuum powder insulated spherical cryogenic liquid storage tank. The product was put into use in 1994 with normal and reliable operation.All its performance indexes have been proved to meet the design requirements through the testing by th Gas Separation and Liquefication Equipment Product Quality Supervision Center of the Ministry of Machine Building Industry. The success of the product fills up the gap in the domestic field.Its liquid nitrogen daily boil-off of the main performance indexes is 0. 05% ,reaching the international leading level.

论述了公称容积为200m3真空粉末绝热低温液体球形贮槽的研制过程。该产品于1994年投入使用,运行正常。经机械工业部气体分离与液化设备产品质量监督分中心测试,1995年通过部级鉴定,全部性能指标均达到设计要求。该产品研制成功,填补了国内空白,其中,主要性能指标液氮日蒸发率为0.05%,达到世界先进水平。

 
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