Thermal and Thermophysical Properties of the Radioactive Graphite–Inert Gas System in Heating. Computer Experiment

2018 ◽  
Vol 91 (4) ◽  
pp. 1079-1089
Author(s):  
N. M. Barbin ◽  
T. S. Kolbin ◽  
D. I. Terent’ev ◽  
S. G. Alekseev ◽  
I. A. Kaibichev
1984 ◽  
Vol 19 (4) ◽  
pp. 349-357
Author(s):  
Shinobu Fujii ◽  
Kazuhiko Ohnaga
Keyword(s):  

2013 ◽  
Vol 740 ◽  
pp. 426-432 ◽  
Author(s):  
Sopon Budngam ◽  
Aree Wichainchai ◽  
Saichol Pimmongkol ◽  
Udom Tipparach

We describe the development of apparatus for measuring of electrical conductivity and Seebeck coefficient with high precision from 85 K to 1,200 K. Electrical resistance was measured by means of four-point probe method as a function of temperature. The temperature below 400 K was measured by using type T thermocouple in vacuum system was used and from 400 to 1,200 was measured by using Type S was applied for temperature between 400 and 1200 Kelvin in an inert gas system. With the dimensions of the specimen, the electrical resistivity (ρT) can be obtained in the unit of microohm-centimeter (μΩ-cm) and be written in polynomial, ρT=-0.3191+6.8×10-3T-6.0×10-7 T2+8.0×10-10T3. The electrical conductivity can be obtained by taking inversion of the electrical resistivity. Seebeck coefficient (αT ) can be calculated in microvolt per Kelvin as follows: αT=1.9653-1.49×10-2T+9.0×10-5T2-2.0×10-7T3+2.0×10-10T4-1.0×10-13T5+3.0×10-17T6 , when T is temperature in K. The Seebeck coefficient data was compared with X-ray diffraction (XRD) and X-ray fluorescence (XRF) of the specimen. The result showed that our developrd apparatus yields the same as standard method when copper with purity greater than 99 percent was employed.


1983 ◽  
Vol 18 (3) ◽  
pp. 272-279
Author(s):  
Kazuhiko Ohnaga ◽  
Shinobu Fujii ◽  
Masahisa Sugita ◽  
Shoichi Naito
Keyword(s):  

This investigation is devoted to the development of a new technology for cargo holds ventilation on tankers. The quality criterion for this process is the value of the residual oxygen concentration inside the hold. The long duration of the process and its high cost directly determine the quality of tanker operation. They directly affect the duration of the operating mode and the speed of tanker loading with a new type of cargo. Time reduction of the inertization of cargo holds and the use of information technology to monitor its current performance can increase the income from the operation of the tanker. It was stated that forced ventilation should be used during the supply of inert gases to the cargo holds of the vessel. When inert gases enter the cargo hold as a jet there could be increased a convective transfer between air and inert gases. In this case, inside the enclosed volume of the hold, the oxygen concentration decreases to standard values in a shorter period of time. A new forced ventilation technology has been developed for the vessels inert gas system. Its use is supplemented by information technologies that give an ability to control the basic parameters of the process


1965 ◽  
Vol 112 (2) ◽  
pp. 241 ◽  
Author(s):  
A. Reisman ◽  
M. Berkenblit ◽  
S. A. Alyanakyan
Keyword(s):  

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