Temperature Measuring System in High Temperature Carbon Reducing Environment

2013 ◽  
Author(s):  
Cong-Xin Li ◽  
Cheng Ren ◽  
Xing-Tuan Yang ◽  
Zhi-Yong Liu ◽  
Sheng-Yao Jiang
Keyword(s):  
High Temperature ◽  
Data Acquisition ◽  
Effective Conductivity ◽  
Structure Design ◽  
Measuring System ◽  
Experimental Result ◽  
Carbon Felt ◽  
Temperature Measuring ◽  
Reducing Environment ◽  
Reducing Condition

An essential material testing facility (EMTF) used for pebble bed effective conductivity measuring experiment of high temperature gas-cooled reactor was developed. As required, temperature measuring points were arranged in EMTF to monitor the temperature field. The maximum test temperature in EMTF would be 1600°C. The main part of EMTF was made of graphite and carbon felt, hence the measuring points were in strong carbon reducing environment, of which some were embedded in the carbon felt. The material choice and structure design of the thermal couples were introduced. In the high temperature region, our specially designed tungsten-rhenium thermocouple was used. For the comparison, some imported tungsten-rhenium thermocouples were also used. The distributive data acquisition system was made of IMP form Solartron in England, which with industrial computer constructs a data acquisition and control system. The software was programmed with configuration software of Sunwayland Forcecontrol. Finally, the measuring results in each part of EMTF were given, such as the heater, testing zone, thermal insulating layers. The experimental result showed that the designed temperature measuring system worked stably and reliably, which could finish the temperature acquisition task in 1600°C high temperature carbon reducing condition. After the experiment, the thermal couples experiencing high temperature in carbon reducing condition were removed out to analyze the structural change and study the damaged condition.

The Research of Temperature Measuring System Based on Digital-Temperature Sensor

2014 ◽  
Vol 595 ◽  
pp. 232-236
Author(s):  
Guo Jun Xu ◽  
Jing Zhang ◽  
Zhao Yang Yang ◽  
Ti Yin Li
Keyword(s):  
Data Acquisition ◽  
Temperature Sensor ◽  
Serial Communication ◽  
Temperature Data ◽  
Flow Chart ◽  
Measuring System ◽  
Temperature Measuring ◽  
Sensing Technology ◽  
Visualization Technology ◽  
Digital Temperature Sensor

The principle and the realization method of the temperature measuring system which based on the temperature data acquisition chip-DS18B20 and the serial communication chip MAX1480B were introduced. Hardware principle diagram, software flow chart and main subprogram are also given. The dependability of the system was strengthened by using visualization technology and ionic smoke sensing technology.

Structure Design of a Hydrogen Storage Alloy PCT Measuring Apparatus

2013 ◽  
Vol 645 ◽  
pp. 320-323 ◽  
Author(s):  
Chao Li ◽  
Hong Hui Cheng ◽  
Jin Ping Pan ◽  
Mei Ting Wang
Keyword(s):  
Hydrogen Storage ◽  
Conceptual Design ◽  
Basic Principle ◽  
Structure Design ◽  
Hydrogen Storage Alloy ◽  
Measuring System ◽  
Measuring Apparatus ◽  
Virtual Design ◽  
Temperature Measuring

The basic principle of the hydrogen storage alloy PCT (Pressure-Composition-Temperature) measuring apparatus is introduced in this article. And the method of 3D virtual design in the hydrogen storage alloy PCT measuring apparatus based on SolidWorks software is described. The conceptual design of the system is conducted by Visio software. And the design, assembly, commissioning and optimization of parts is conducted by SolidWorks and the valve, gas piping, sample room, measuring apparatus are improved. Eventually it is found that the reliability and development efficiency of the measuring system can be effectively improved.

Comparison of the mineralogical effects of an experimental forest fire on a goethite/ferrihydrite soil with a topsoil that contains hematite, maghemite and goethite

Clay Minerals ◽  
2009 ◽  
Vol 44 (2) ◽  
pp. 239-247 ◽  
Author(s):  
P. Nørnberg ◽  
A. L. Vendelboe ◽  
H. P. Gunnlaugsson ◽  
J. P. Merrison ◽  
K. Finster ◽  
...  
Keyword(s):  
Organic Matter ◽  
High Temperature ◽  
Forest Fire ◽  
Forest Fires ◽  
Organic Matter Content ◽  
Matter Content ◽  
Humid Climate ◽  
Fe Mineralogy ◽  
Reducing Environment

AbstractA long-standing unresolved puzzle related to the Danish temperate humid climate is the presence of extended areas with large Fe contents, where goethite and ferrihydrite are present in the topsoil along with hematite and maghemite. Hematite and, particularly, maghemite would normally be interpreted as the result of high temperature as found after forest fires. However, a body of evidence argues against these sites having been exposed to fire. In an attempt to get closer to an explanation of this Fe mineralogy, an experimental forest fire was produced. The results showed a clear mineralogical zonation down to 10 cm depth. This was not observed at the natural sites, which contained a mixture of goethite/ferrihydrite, hematite and maghemite down to 20 cm depth. The experimental forest fire left charcoal and ashes at the topsoil, produced high pH and decreased organic matter content, all of which is in contrast to the natural sites. The conclusion from this work is that the mineralogy of these sites is not consistent with exposure to forest fire, but may instead result from long-term transformation in a reducing environment, possibly involving microbiology.

scholarly journals Simple Algebraic Expressions for the Prediction and Control of High-Temperature Annealed Structures by Linear Perturbation Analysis

2021 ◽  
Vol 26 (2) ◽  
pp. 43
Author(s):  
Constantino Grau Grau Turuelo ◽  
Cornelia Breitkopf
Keyword(s):  
High Temperature ◽  
Surface Diffusion ◽  
Perturbation Analysis ◽  
Algebraic Model ◽  
Structure Design ◽  
Linear Perturbation ◽  
Prediction And Control ◽  
Void Shape ◽  
Void Structure ◽  
And Control

The prediction and control of the transformation of void structures with high-temperature processing is a critical area in many engineering applications. In this work, focused on the void shape evolution of silicon, a novel algebraic model for the calculation of final equilibrium structures from initial void cylindrical trenches, driven by surface diffusion, is introduced. This algebraic model provides a simple and fast way to calculate expressions to predict the final geometrical characteristics, based on linear perturbation analysis. The obtained results are similar to most compared literature data, especially, to those in which a final transformation is reached. Additionally, the model can be applied in any materials affected by the surface diffusion. With such a model, the calculation of void structure design points is greatly simplified not only in the semiconductors field but in other engineering fields where surface diffusion phenomenon is studied.

Realization of multichannel fluorescent temperature measuring system

2000 ◽  
Author(s):  
Danping Jia ◽  
Wei Lin ◽  
Jingjie Bai ◽  
YinWen Lin
Keyword(s):  
Measuring System ◽  
Temperature Measuring

Experimental Study on Carbonization of Low-Rank Pulverized Coal with High Temperature Heat Pipe

2014 ◽  
Vol 953-954 ◽  
pp. 1035-1039
Author(s):  
Li Qun Wang ◽  
Zhong Bo Yi ◽  
Zhong Xiang Wei
Keyword(s):  
High Temperature ◽  
Heat Pipe ◽  
Pulverized Coal ◽  
Holding Time ◽  
Raw Material ◽  
Low Rank ◽  
Experimental Result ◽  
Operating Characteristics ◽  
Temperature Heat ◽  
High Temperature Heat Pipe

Aimed at improving the utilization of pulverized coal, high-temperature heat pipe technology was introduced into lignite carbonization.Under the design of power of 10kw semi-industrial pulverized coal carbonization test equipment, Fugu lignite coal as raw material to investigate the operating characteristics of the device and carbonization characteristics. Experimental result shows that the high temperature heat pipes heat steadily and meet the temperature requirement of low-temperature carbonization. With the extension of the holding time, the semi-coke fixed carbon content increasing, but volatile matter vice versa, however, holding time above 60 minutes, the effect of carbonization is not obvious, and the best carbonization time is 30 ~ 60 minutes. The length of the holding time has little effect on gas composition, the content of H2 and CH4 are relatively higher than the rest gas, (H2 + CH4) gas accounted for 70% of the total, the heating value remains at 18.76 ~ 19.22MJ/m3, belongs to medium-high value gas, could provide for industrial and civilian use.

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