scholarly journals Scaling analysis of the coupled heat transfer process in the high-temperature gas-cooled reactor core

1986 ◽  
Author(s):  
J.C. Conklin
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Transfer Process ◽  
Reactor Core ◽  
Heat Transfer Process ◽  
Scaling Analysis ◽  
Coupled Heat Transfer ◽  
High Temperature Gas

Numerical simulation on heat transfer process in the reactor cavity of modular high temperature gas-cooled reactor

2017 ◽  
Vol 125 ◽  
pp. 1015-1024 ◽  
Author(s):  
Hangbin Zhao ◽  
Yujie Dong ◽  
Yanhua Zheng ◽  
Tao Ma ◽  
Xiaoming Chen
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Temperature ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
High Temperature Gas

scholarly journals A Parametrical Study on Convective Heat Transfer between High-Temperature Gas and Regenerative Cooling Panel

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1784
Author(s):  
Jiangyu Hu ◽  
Ning Wang ◽  
Jin Zhou ◽  
Yu Pan
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
High Temperature ◽  
Thermal Protection ◽  
Flow Direction ◽  
Heated Surface ◽  
Heat Transfer Process ◽  
Cocurrent Flow ◽  
Regenerative Cooling ◽  
High Temperature Gas

Thermal protection is still one of the key challenges for successful scramjet operations. In this study, the three-dimensional coupled heat transfer between high-temperature gas and regenerative cooling panel with kerosene of supercritical pressure flowing in the cooling channels was numerically investigated to reveal the fundamental characteristics of regenerative cooling as well as its influencing factors. The SST k-ω turbulence model with low-Reynolds-number correction provided by the pressure-based solver of Fluent 19.2 is adopted for simulation. It was found that the heat flux of the gas heated surface is in the order of 106 W/m2, and it declines along the flow direction of gas due to the development of boundary layer. Compared with cocurrent flow, the temperature peak of the gas heated surface in counter flow is much higher. The temperature and heat flux of the gas heated surface both rises with the static pressure and total temperature of gas. The heat flux of the gas heated surface increases with the mass flow rate of kerosene, and it hardly changes with the pressure of kerosene. Results herein could help to understand the real heat transfer process of regenerative cooling and guide the design of thermal protection systems.

Numerical simulation and parameters optimization on gas–solid heat transfer process of high temperature sinter

2011 ◽  
Vol 38 (7) ◽  
pp. 525-529 ◽  
Author(s):  
Z Wen ◽  
H-Z Shi ◽  
X Zhang ◽  
G-F Lou ◽  
X-L Liu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Temperature ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Parameters Optimization ◽  
Temperature Sinter ◽  
High Temperature Sinter

Modeling Cooling Process of High Temperature Sinter

2011 ◽  
Vol 71-78 ◽  
pp. 2411-2415 ◽  
Author(s):  
Guo Feng Lou ◽  
Zhi Wen ◽  
Xun Xiang Liu ◽  
Xin Zhang ◽  
Kun Chan Zheng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
High Temperature ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Measured Data ◽  
Cooling Process ◽  
Temperature Sinter ◽  
High Temperature Sinter ◽  
Operation Parameters

In the paper, a 1-D unsteady mathematical model for the Gas-Solid heat transfer process of high temperature sinter has been developed, and is used to analyse the cooling process of high temperature sinter. A set of measured data is used to verify the modeling result. The agreement between the measured and the modeling is good. The effect of operation parameters on the cooling process of the annular cooler has been investigated.

scholarly journals Computational fluid dynamics investigation of thermal-hydraulic characteristics in a simplified pebbled bed modular reactor core using different arrangements of fuel elements

2017 ◽  
Vol 10 (3) ◽  
pp. 119-127 ◽  
Author(s):  
Yuyu Bai ◽  
Nan Gui ◽  
Xingtuan Yang ◽  
Jiyuan Tu ◽  
Shengyao Jiang
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Temperature ◽  
Reactor Core ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Face Centered ◽  
Fuel Elements ◽  
High Temperature Gas

High-temperature gas-cooled reactor is a kind of advanced nuclear reactor in which the core is packed with spherical fuel elements. In high-temperature gas-cooled reactors, the operating temperature is higher than that in ordinary light water reactors. In an attempt to analyze the flow pattern and heat transfer situation to provide reference for the safe operation of the pebble bed reactors, a segment of simplified high-temperature gas-cooled reactor core is simulated with computational fluid dynamics method. Four kinds of arrangement, including simple cubic, body-centered cubic, face-centered cubic, and a combination structure of body-centered cubic and face-centered cubic, are studied, respectively. Based on the simulation results, higher heat transfer capability and lower pebble temperature are obtained in the case with the most compact arrangement. The drag coefficient ( Cd) for four arrangements with different inlet Reynolds number (Re) is obtained and relationship between Re and Cd is analyzed. In addition, a simulation with a broken fuel element in the body-centered cubic fluid domain has been performed. The results show that the presence of broken fuel may result in uneven flow, which will change the heat transfer condition. So it is better to avoid broken fuel element in a high-temperature gas-cooled reactor.

A Numerical Research on the Heat Transfer Process for a General Passive Heat Removal System

2017 ◽  
Author(s):  
Li Wei ◽  
Liu Zhuo ◽  
Guo Qiang ◽  
Yuan Yidan
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Transfer Process ◽  
Heat Removal ◽  
Heat Transfer Process ◽  
Sensitivity Analyses ◽  
Scaling Analysis ◽  
Water Tank ◽  
Heat Removal System ◽  
Removal System

A code module for simulating a general passive heat removal system composed of an elevated water tank, a heat exchanger and pipes connecting them is developed in this paper. Then, a typical heat transfer process in this heat removal system is calculated. According to the simulation results, the flash shows the most important impact of the heat transfer process for this passive heat removal system, especially the moment of the flash appearing. In order to design a scaled-down facility with the help of a scaling method to carry out experimental studies on the heat transfer process occurring in a PHRS for developing a more efficient heat removal system, all influence factors of flash should be conducted before a scaling analysis to make a good understanding for the flash. Finally, we get some qualitative conclusions based on sensitivity analyses for some influence parameters: 1) water temperature in the water tank, system flow resistance and the length of the outlet pipe should be ensured by designing according to scaling criteria strictly; 2) choosing a heat exchanger with geometric and material similarity can realize a consistency of heat transfer efficiency and 3) the liquid level in the water tank is less important.

scholarly journals Thermal Performance Analysis of High-temperature Heat Transfer Process of Solar Energy

2018 ◽  
Vol 4 (2) ◽  
pp. 160
Author(s):  
X L Xia ◽  
F X Sun ◽  
H P Tan ◽  
X Chen
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Performance Analysis ◽  
Solar Energy ◽  
Thermal Performance ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Temperature Heat

.

scholarly journals Numerical Simulation of the Heat Transfer Process Potato Subjected to high temperature with Finite Element Method

2021 ◽  
Vol 18 (116) ◽  
pp. 337-346
Author(s):  
zahra khodakaramifard ◽  
حسین زاده Hosseinzadeh ◽  
Alireza Shirazinejad ◽  
◽  
◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
High Temperature ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Element Method
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