Effect of temperature distribution on tritium permeation rate to cooling water in JA DEMO condition

2021 ◽  
Vol 169 ◽  
pp. 112576
Author(s):  
Kazunari Katayama ◽  
Youji Someya ◽  
Takumi Chikada ◽  
Kenji Tobita ◽  
Hirofumi Nakamura ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Cooling Water ◽  
Permeation Rate ◽  
Effect Of Temperature ◽  
Tritium Permeation

Estimation of Tritium Permeation Rate to Cooling Water in Fusion DEMO Condition

2017 ◽  
Vol 71 (3) ◽  
pp. 261-267 ◽  
Author(s):  
Kazunari Katayama ◽  
Youji Someya ◽  
Kenji Tobita ◽  
Hirofumi Nakamura ◽  
Hisashi Tanigawa ◽  
...  
Keyword(s):  
Cooling Water ◽  
Permeation Rate ◽  
Tritium Permeation

scholarly journals Experimental study of heat transfer through cooling water circuit in a reactor vault by using Al2O3 nano fluid

2018 ◽  
Vol 22 (2) ◽  
pp. 1149-1161 ◽  
Author(s):  
Maria Anish ◽  
Balakrishnan Kanimozh
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Base Fluid ◽  
Nuclear Reactor ◽  
Characteristic Curve ◽  
Reactor Core ◽  
Cooling Water ◽  
Heat Transfer Process ◽  
Nano Fluid ◽  
Al2o3 Nanoparticle

The heat produced in the nuclear reactor due to fission reaction must be kept in control or else it will damage the components in the reactor core. Nuclear plants are using water for the operation dissipation of heat. Instead, some chemical substances which have higher heat transfer coefficient and high thermal conductivity. This experiment aims to find out how efficiently a nanofluid can dissipate heat from the reactor vault. The most commonly used nanofluid is Al2O3 nanoparticle with water or ethylene as base fluid. The Al2O3 has good thermal property and it is easily available. In addition, it can be stabilized in various PH levels. The nanofluid is fed into the reactor?s coolant circuit. The various temperature distribution leads to different characteristic curve that occurs on various valve condition leading to a detailed study on how temperature distribution carries throughout the cooling circuit. As a combination of Al2O3 as a nanoparticle and therminol 55 as base fluid are used for the heat transfer process. The Al2O3 nanoparticle is mixed in therminol 55 at 0.05 vol.% concentration. Numerical analysis on the reactor vault model was carried out by using ABAQUS and the experimental results were compared with numerical results.

scholarly journals Finite Element Analysis of Temperature Distribution and Stress Behavior of Squeeze Pressure Composites

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
P. Gurusamy ◽  
T. Sathish ◽  
V. Mohanavel ◽  
Alagar Karthick ◽  
M. Ravichandran ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Cooling Rate ◽  
Base Alloy ◽  
Cast Alloy ◽  
Simulation Software ◽  
Engineering Industry ◽  
Effect Of Temperature ◽  
Cooling Curves ◽  
Squeeze Pressure

Aluminium-reinforced composites play a vital role in the engineering industry because of their better strength and stiffness. The properties are directly related to the solidification phenomenon of the cast alloy. The design engineer should understand the importance of the solidification behavior of base alloy and its reinforcement. Composites’ solidification study is rare, and the reviews are limited. The solidification process is analyzed using the finite element method (FEM), and this would fetch a lot of information about the cooling rate of the composites and also helps to reduce the time in experimentation. This paper reports and plots the cooling curves of Al/SiCp composites using simulation software. Cylindrical-shaped composites were developed using the squeeze casting method, and the experimental cooling curves were plotted using a K-type thermocouple. Composites samples were prepared at the following squeeze pressures: 0, 30, 50, 70, 100, and 130 MPa; melt and die temperature was kept constant at 800 and 400°C, respectively. The experimental and FEA cooling curves were compared, and it was agreed that the increase in the squeeze pressure increases the cooling rate of the developed composite. Furthermore, the effect of temperature distribution from the inner region of the melt and die material which causes the radial and tangential stress of components has also been examined.

A Second Law Approach to Characterising Thermally Stratified Hot Water Storage With Application to Solar Water Heaters

1999 ◽  
Vol 121 (4) ◽  
pp. 194-200 ◽  
Author(s):  
G. Rosengarten ◽  
G. Morrison ◽  
M. Behnia
Keyword(s):  
Temperature Distribution ◽  
Heat Exchangers ◽  
Water Storage ◽  
Heating System ◽  
Hot Water ◽  
Effect Of Temperature ◽  
Storage Efficiency ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water

This paper presents a method of characterising and evaluating the performance of hot water storage systems in terms of their temperature distribution. The change in exergy from the stratified state to the delivery state depends on the stored energy and the stratification. It can thus he used to define the storage efficiency for sensible heat storage devices. A new parameter that isolates the stratification component of the exergy is defined and called the stratification efficiency. The effect of temperature distribution, delivery temperature and tank cross-section on exergy and stratification efficiency is investigated. The advantage that stratification offers over a mixed tank is examined in terms of the storage efficiency and overall solar water heating system performance. Exergy is used to assess the operation of mantle heat exchangers in solar water heating systems and it is shown that exergy and stratification efficiency, as well as energy, should be used to ascertain the performance of such heat exchangers.

125 Effect of Temperature Distribution in Warm Hydroforming of AZ31 Magnesium Alloy Tube

2009 ◽  
Vol 2009.17 (0) ◽  
pp. _125-1_-_125-2_
Author(s):  
Ken-ichi MANABE ◽  
Yu OGAWA ◽  
Kazuo TADA ◽  
Tsutomu MURAI ◽  
Humiaki NAKAGAWA
Keyword(s):  
Temperature Distribution ◽  
Magnesium Alloy ◽  
Az31 Magnesium Alloy ◽  
Effect Of Temperature ◽  
Alloy Tube ◽  
Warm Hydroforming

Temperature Field Analysis of Bearing

2011 ◽  
Vol 480-481 ◽  
pp. 974-979
Author(s):  
Yan Shuang Wang ◽  
Hai Feng Zhu
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Rotational Speed ◽  
Axial Load ◽  
Field Analysis ◽  
Effect Of Temperature ◽  
Radial Load ◽  
Thermal Network ◽  
Network Method ◽  
Thermal Network Method

Based on the quasi-static analysis and the power loss analysis, the temperature distribution is calculated by ANSYS.The different part temperatures of bearing are obtained. The influences of rotational speed, axial load and radial load on the temperature distribution are analyzed. The results reveal that axial load and rotational speed affect temperature distribution strongly. The effect of radial load is not signifcant,and the maxtemperature of bearing is at the point between balls and the inner ring. Bearings with shaft are widely used in gyro motors of aviation, aerospace, marine navigational systems. In a few applications, however, heat generated by friction can affects its performance, life and reliability, and consequently influences control precision and life of gyro motors[1]. So it’s important to evaluate heat generation of bearings with shaft for the design, manufacture and its application. A few researchers [2, 3] have analyzed the concentrated contact temperature. Their researches have been mainly focused on the temperature of contact surface. In addition, some researchers (Chinese and foreign) have calculated the temperature of bearing under the thermal network method [4, 5]. The above methods are easy to carry out, but only can the temperatures of some point be found. Compared with the thermal network method, the finite element model can get the temperature of the whole model. The temperature analysis has been pursued by some foreign and Chinese researchers under the method [6, 7]. The steady temperature field of bearing with shaft from a gyro motor is studied in the paper. The speed of ball and the temperature distribution are analyzed and studied by VC6.0++ and ANSYS. The temperature distribution under different axial load, speed of inner ring and radial load is calculated. Therefore the main effect of temperature distribution can be found.

Isotope Gauges: An Analysis of Some Errors in Hot Metal Thickness Measurement

1971 ◽  
Vol 4 (7) ◽  
pp. T117-T124
Author(s):  
F. X. Macedo ◽  
F. Seredynski
Keyword(s):  
Temperature Distribution ◽  
Thickness Measurement ◽  
Carbon Steels ◽  
Effect Of Temperature ◽  
Measuring Instruments ◽  
Hot Metal ◽  
Theoretical Evaluation ◽  
Factors Affecting ◽  
Statistical Variation ◽  
Wide Range

Isotope gauges are particularly suitable as thickness measuring instruments for hot metal above 5 cm. thick and their application for this purpose is continuing to increase. The paper discusses some of the factors affecting the accuracy of these gauges and, in particular attempts a theoretical evaluation of the errors due to steel composition, temperature distribution and statistical variation. These errors are evaluated for three carbon steels. Errors in thickness measurement due to the different compositions of these steels are evaluated for the two isotope sources most commonly used for gauging purposes namely, Americium 241 and Caesium 137. These isotope sources are representative of those used for the entire practical range of thickness measurement. The paper considers the effect of temperature distribution across the depth of metal on the mass attenuating the γ-rays and the thickness measurements so evaluated are compared with those determined assuming a homogenous stock temperature. The principle of constant absorption is described and also some of its limitations where a wide range of measurements is required. Finally an artifice is discussed whereby some of the limitations may be overcome.

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