Rapid vaporization of subcooled liquid in a capillary structure

A novel process is introduced for rapid vaporization of subcooled liquid in a capillary structure. The process consists of a low-thermal-conductivity porous wick, heated from a downward-facing grooved heating block that is in intimate contact with the upper surface of the wick structure. For such a specially configured heat transfer device, measurements show that vapor can be generated rather quickly once a sufficient amount of heat was applied. The mechanisms leading to the rapid vaporization of liquid are numerically investigated. It is found that the low thermal conductivity of the capillary structure and the presence of the extremely steep temperature gradients at the fin/porous structure interface due to the rather weak natural convection, reflected by small-scale secondary flow cells below the heated fins, are responsible for the rapid vaporization of subcooled liquid.     

Study on the sensing capability of Fe‐C alloy corrosion sensing film

In this paper, a Fe‐C alloy corrosion sensing film was fabricated on the fiber core by PVD, PVD incorporated with electroplating, and other methods. A Light Power Test System which was composed of a LD lamp‐house, a Bare Fiber Adapter (BFA) and a light power meter was used to detect the changes of lamp‐house's output power in the corrosion process of the Fe‐C alloy film. The major factors that may have some effects on the sensing capability of the Fe‐C alloy film were analyzed. The initial results show that lamp‐house's output power increases gradually with the occurrence of Fe‐C alloy film's corrosion, which accords basically with the sensing principle of the film. There are some diversities in the sensing ability of the Fe‐C alloy film fabricated by different methods. The trend of changes of lamp‐house's output power can be used as a qualitative token of the corrosion information of the Fe‐C alloy film. These data have been used for some elementary preparations for a carbon steel Fiber Optical Corrosion Sensor (FOCS).     

工业企业氮气供应方案的确定

论述了氮气供应的3个方案(氮气汇流排供应方案、液氮气化供应方案、制氮机供应方案),采用年费用法进行方案的经济比较,得出制氮机供应方案为最佳方案。     

CO2激光治疗腋臭与传统手术治疗腋臭的对比观察

本文采用二氧化碳激光治疗 14 0例腋臭病人。 14 0例患者术后 1个月痊愈 10 0例 ,2个月内痊愈 2 0例 ,2个月以上痊愈 10例 ,仅 5例术后仍有不良气味。本组病例与同期行外科手术治疗的 14 0例腋臭患者比较 ,二氧化碳激光治疗腋臭具有痊愈快 ,无并发症的优点 ,值的推广。     

Reduction of trace oxygen by hydrogen leaking during selective vaporization to produce ultra-pure cadmium for electronic applications

A viable method utilizing leaking of high pure hydrogen gas into the distillation retort ambience maintained at 8.0 × 10^− 3 Torr was devised to minimize the incorporation of trace oxygen in cadmium and the possibility of forming cadmium oxides during purification using selective vaporization. Hydrogen leaking at the rate of 5 standard cubic centi-metre per minute (sccm) during distillation at soaking temperature of 450 °C reduced trace oxygen from 230-350 ppm for raw cadmium of 3N8 (99.98%) purity and from 5-10 ppm for distilled cadmium of 6N purity. This can be compared to the presence of 30-38 ppm oxygen in cadmium distilled under simple-vacuum of 2.1 × 10^− 3 Torr achievable in the system. A detailed comparison between distillation under simple-vacuum and hydrogen leaking is presented with reference to purity, distillation rate, soaking temperature, and mean free path of distillate vapors.     

Determination of Trace Rare Earth Elements in Biological Samples by ICP-AES with Tungsten-spiral Electrothermal Vaporization Sampling

A method for determination of trace rare earth elements in biological sample by ICP-AES withtungsten-spiral electrothermal vaporization(TETV-ICP-AES)sampling has been developed in this work.Several influencing factors including desolvation and vaporization parameters,carrier gas flow rate and ma-trix effect were investigated in detail.Under optimal experimental conditions,the detection limits for La,Nd,Gd,Dy,Ho,Yb,Lu and Y were obtained in the range of 10~(-9)～10~(-11) g,and they are comparable to and,inmost instances,better than those for the GFAAS and conventional pneumatic nebulisation-ICP-AES.Theprecision(RSD)obtained for this method is less than 6%.     

空气鼓泡法戊烷气化的研究

对空气鼓泡法戊烷气化过程进行了传热和传质分析，讨论了空气流量、气泡总面积和温度对戊烷气化量的影响，提出了增加戊烷气化量的方法。     

Determination of Trace Amount of Vanadium in High Purity Y_2O_3 by Electrothermal Vaporization－ICP－AES With Bi（PDC）_3 Coprecipitation

ＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＴｒａｃｅＡｍｏｕｎｔｏｆＶａｎａｄｉｕｍｉｎＨｉｇｈＰｕｒｉｔｙＹ_２Ｏ_３ｂｙＥｌｅｃｔｒｏｔｈｅｒｍａｌＶａｐｏｒｉｚａｔｉｏｎ－ＩＣＰ－ＡＥＳｗｉｔｈＢｉ（ＰＤＣ）_３ＣｏｐｒｅｃｉｐｉｔａｔｉｏｎＨｕＢｉｎ；Ｙａ?..     

我国6种主要原油及其直馏馏分3种蒸馏曲线的关系

根据我国大庆、华北、胜利、孤岛、中原和克拉玛依６种主要原油及其馏分油３种蒸馏过程实测的６４组平衡闪蒸数据，实沸点蒸馏及馏程试验各２０９组实测数据，提出了适合６种油的３种蒸馏换算式２１个，及相应的６张算图，算式中除３个式子外，其余１８个算式绝对平均偏差均低于ＡＰＩ图表偏差。