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beijing international conference on cryogenics

作者： Zhengdao Wang~(a b *) Zhengzhong Duan~c Zhaojia Chen~b (~a Cryogenic Laboratory Chinese Academy of Sciences beijing 100080 People’s Republic of China) (~bInstitute of Physics Chinese Academy of Sciences beijing 100080 People’s Republic of China) (~c Northwest Inst.for Non ferrous Metal Research Xi’an Shanxi 710016 People’s Republic of China)

＜正＞In this study,the calculating equations about the stress caused by thermal cycling on high temperature superconducting tapes has been *** to the results,we calculated the thermal stress on two types of Bi（2223） tapes,and gave the explanation why alloy-sheathed tape can endure thermal cycling more than Ag-sheathed tape.

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Study on a Pulse Tube Cryocooler Using Gas Mixture as Its Working Fluid

Study on a Pulse Tube Cryocooler Using Gas Mixture as Its Wo...

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beijing international conference on cryogenics

作者： Gao chengming He yaling Chen Zhongqi Li Min~* School of Energy and Power Engineering Xi’an Jiaotong University 710049 Xi’an China ~*Engineering Physics Department Tsing Hua University 100084 beijing China

＜正＞In order to improve the performance of a one-stage pulse tube cryocooler,gas mixtures are used for comparison,which have been used in other cryocoolers.A mixture of hydrogen and helium was investigated in this *** the structure of the pulse tube is the same as mentioned in reference and the working conditions are:fi’equency 15Hz,average pressure 1.1Mpa,hot end temperature 300K and cold end temperature 80K,it has been found that there are optimal molar percentage for the maximal cooling power and the maximal-cooling efficiency.

关键词： pulse tube cryocooler gas mixture properties performance

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Microstructure Changes of Peach Texture and Pectin in Controlled Atmosphere Storage

Microstructure Changes of Peach Texture and Pectin in Contro...

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国际农业工程大会

作者： Hongshun Yang PhD Candidate1954 Huashan Rd. Institute of Refrigeration & cryogenics Shanghai Jiao TongUniversity Shanghai 200030 P. R. China. Guoping Feng2678 Qixin Rd. Department of Food Science & Technology Shanghai Jiao TongUniversity Hongjie An PhD Candidate1954 Huashan Rd. School of Life Science & Technology Shanghai Jiao TongUniversity Yunfei Li Dr2678 Qixin Rd. Department of Food Science & Technology Shanghai Jiao TongUniversity Shanghai 201101 P. R. China.

＜正＞ The effects of air compositions on the microstructure of texture and pectin of yellow peaches （prunus persicu L. Batsch） during controlled atmosphere （CA） storage were evaluated. Firmness and texture profile analysis （TPA） were studied by TA-XT texture analyzer. The contents of water-soluble （WSP）, chelate-soluble （CSP） and alkaline-soluble （SSP） pectin were assayed by carbazole spectrophotemetry, and the microstructure of pectin investigated

关键词： Controlled atmosphere (CA) Peach Pectin Texture Atomic force microscopy

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基于混合模型预测低温空分规整填料塔的性能(英文)

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Chinese Journal of Chemical Engineering 2014年第8期22卷 930-936页

作者：张小斌朱佳凯吴钊熊炜张学军邱利民 Institute of Refrigeration and cryogenics Zhejiang University

A detailed investigation of a thermodynamic process in a structured packing distillation column is of great importance in prediction of process *** order to keep the simplicity of an equilibrium stage model and the accuracy of a non-equilibrium stage model,a hybrid model is developed to predict the structured packing column in cryogenic air separation.A general solution process for the equilibrium stage model is developed to solve the set of equations of the hybrid model,in which a separation efficiency function is introduced to obtain the resulting tri-diagonal matrix and its solution by the Thomas *** an example,the algorithm is applied to analyze an upper column of a cryogenic air separation plant with the capacity of 17000 m^3·h^(-1).Rigorous simulations are conducted using Aspen RATEFRAC module to validate the *** temperature and composition distributions are in a good agreement with the two *** effects of inlet/outlet position and flow rate on the temperature and composition distributions in the column are *** results demonstrate that the hybrid model and the solution algorithms are effective in analyzing the distillation process for a cryogenic structured packing column.

关键词：规整填料塔混合模型低温空气性能预测分离结构非平衡级模型求解算法成分分布

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