scholarly journals Temperature distribution modeling of PV and cooling water PV/T collectors through thin and thick cooling cross-fined channel box

2021 ◽  
Author(s):  
Mohamed R. Gomaa ◽  
Mohsen Ahmed ◽  
Hegazy Rezk
Keyword(s):  
Temperature Distribution ◽  
Cooling Water ◽  
Distribution Modeling

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.

Temperature distribution modeling of a welded joint where validation was performed by the use of thermographic images

2015 ◽  
Author(s):  
Eduardo José Fernandes Rocha ◽  
Tiago de Sousa Antonino ◽  
Ricardo Artur Sanguinetti Ferreira ◽  
José Maria Andrade Barbosa ◽  
Pablo Batista Guimarães ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Welded Joint ◽  
Distribution Modeling

Effects of Nonuniform Tissue Properties on Temperature Prediction in Magnetic Nanohyperthermia

2011 ◽  
Vol 2 (2) ◽  
Author(s):  
Qian Wang ◽  
Zhong-Shan Deng ◽  
Jing Liu
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Cooling Water ◽  
Blood Perfusion ◽  
Source Distribution ◽  
Surface Cooling ◽  
Temperature Prediction ◽  
Tissue Properties ◽  
Distribution Features ◽  
Em Field

In tumor hyperthermia, effectively planning in advance and thus controlling in situ the heating dosage within the target region are rather critical for the success of a therapy. Many studies have simulated the temperature distribution during hyperthermia. However, most of them are based on fixed and known heat source distributions, which are generally very complex to compute. Besides, there is little information concerned the numerical analysis of temperature during magnetic hyperthermia loading with magnetic nanoparticles (MNPs), which has its specific heat source distribution features. Particularly, the parameters for different human tissues varied very much, which will cause a serious impact on the heat source and temperature distribution. This paper is aimed at investigating the effects of nonuniform tissue properties to the temperature prediction in magnetic nanohyperthermia and other possible effect factors including external EM field, MNP properties, tumor size and depth, surface cooling conditions, etc. It was found that the spatial heat source generated in the nonuniform model appears smaller than that in the uniform model. This is mainly resulted from the energy reflection when transmitting from fat to tumor and muscle under the same condition, while the temperature is higher on account of overall contribution of different parameters including tissue thermal conductivity, blood perfusion, density, heat capacity, and metabolic heat production rate, which also affect the temperature distribution apart from the heat source. Controlling the properties of the external EM field, MNPs and cooling water can acquire different temperature distributions. Tumors with different depths and sizes need specific plannings, which require as accurate as possible temperature prediction. The nonuniform model can be further improved to be applied in magnetic nanohyperthermia treatment planning and thus help optimize the surgical procedures.

Experimental Study of Roll Thermal Crown in 1750 Hot Strip Mill

2010 ◽  
Vol 145 ◽  
pp. 106-110 ◽  
Author(s):  
Zhan Fu Ma ◽  
Zi Wen Li ◽  
Xi Cheng Zhao ◽  
Mou Wei Li
Keyword(s):  
Experimental Study ◽  
Temperature Distribution ◽  
Cooling Water ◽  
Work Roll ◽  
Hot Strip Mill ◽  
Roll Surface ◽  
Cooling Pipe ◽  
Hot Strip ◽  
Thermal Crown

In the paper, the temperature distribution on the work roll surface of a 1750 hot strip mill is studied, and the variety rules of the thermal crown are analyzed. The result of test shows that the work roll thermal crown is significantly affected by cooling. The thermal crown obviously is improved after altering the distance between the cooling pipe and the work roll and changing the type of cooling water faucet. From this paper, it is known that different number of rolling coils cause different thermal crown of the work roll. The final change rule shows that the work roll thermal crown is the largest in Stand 1 and the smallest in Stand 6 in a rolling period.

Analysis of Casting Roll Temperature Distribution and Thermal Deformation in Twin-Roll Continuous Strip Casting

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Guangming Zhu ◽  
Yuwen Zhang
Keyword(s):  
Temperature Distribution ◽  
Thermal Deformation ◽  
Cooling Water ◽  
Processing Parameters ◽  
Strip Casting ◽  
Fe Model ◽  
Roll Temperature ◽  
Shrink Fit ◽  
Twin Roll ◽  
Continuous Strip

In twin-roll continuous strip casting, casting roll is heated by molten metal, and thermal deformation is caused to change strip thickness and quality. It is imperative to understand casting roll temperature distribution and thermal deformation. In this paper, a 2D finite element (FE) model is built to analyze casting roll temperature and thermal deformation under various casting processing parameters. The influences of shrink fit of roll sleeve and shaft are taken into account and the coating was treated to be consistent to the actual situation. The results show that casting temperature fluctuates cyclically within a thin top layer in stable casting, and there is almost no temperature fluctuation near cooling water holes.

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