scholarly journals Macroscopic Structural Analysis on a 10 kW Class Lab-Scale Process Heat Exchanger Prototype under a High-Temperature Gas Loop Condition

Engineering ◽  
2013 ◽  
Vol 05 (01) ◽  
pp. 117-124 ◽  
Author(s):  
Kee-Nam Song ◽  
Sung-Deok Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Structural Analysis ◽  
Process Heat ◽  
Loop Condition ◽  
Gas Loop ◽  
High Temperature Gas

High-Temperature Structural Analysis Model of the Process Heat Exchanger for Helium Gas Loop (II)

2010 ◽  
Vol 34 (10) ◽  
pp. 1455-1462 ◽  
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Chan-Soo Kim ◽  
Seong-Duk Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Structural Analysis ◽  
Analysis Model ◽  
Helium Gas ◽  
Process Heat ◽  
Gas Loop

High-Temperature Structural-Analysis Model of Process Heat Exchanger for Helium Gas Loop (I)

2010 ◽  
Vol 34 (9) ◽  
pp. 1241-1248 ◽  
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Yong-Wan Kim ◽  
Seong-Duk Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Structural Analysis ◽  
Analysis Model ◽  
Helium Gas ◽  
Process Heat ◽  
Gas Loop

High-temperature Structural Analysis of Small-scale Prototype of Process Heat Exchanger (III)

2011 ◽  
Vol 35 (2) ◽  
pp. 191-200 ◽  
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Chan-Soo Kim ◽  
Seong-Duk Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Structural Analysis ◽  
Small Scale ◽  
Process Heat

ICONE19-43005 HIGH-TEMPERATURE STRUCTURAL MODELING ON THE PROCESS HEAT EXCHANGER PROTOTYPE FOR THE HELIUM GAS LOOP

2011 ◽  
Vol 2011.19 (0) ◽  
pp. _ICONE1943-_ICONE1943
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Chan-Soo Kim ◽  
Sung-Deok Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Structural Modeling ◽  
Helium Gas ◽  
Process Heat ◽  
Gas Loop

Active Chemistry Control for Coolant Helium Applying High-Temperature Gas-Cooled Reactors

2008 ◽  
Author(s):  
Nariaki Sakaba ◽  
Shimpei Hamamoto ◽  
Yoichi Takeda
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Heat Exchanger ◽  
Chemical Composition ◽  
Structural Integrity ◽  
Carbon Deposition ◽  
Control Technology ◽  
Equilibrium Study ◽  
Intermediate Heat Exchanger ◽  
High Temperature Gas

Lifetime extension of high-temperature equipment such as the intermediate heat exchanger of high-temperature gas-cooled reactors (HTGRs) is important from the economical point of view. Since the replacing cost will cause the increasing of the running cost, it is important to reduce replacing times of the high-cost primary equipment during assumed reactor lifetime. In the past, helium chemistry has been controlled by the passive chemistry control technology in which chemical impurity in the coolant helium is removed as low concentration as possible, as does Japan’s HTTR. Although the lifetime of high-temperature equipment almost depends upon the chemistry conditions in the coolant helium, it is necessary to establish an active chemistry control technology to maintain adequate chemical conditions. In this study, carbon deposition which could occur at the surface of the heat transfer tubes of the intermediate heat exchanger and decarburization of the high-temperature material of Hastelloy XR used at the heat transfer tubes were evaluated by referring the actual chemistry data obtained by the HTTR. The chemical equilibrium study contributed to clarify the algorism of the chemistry behaviours to be controlled. The created algorism is planned to be added to the instrumentation system of the helium purification systems. In addition, the chemical composition to be maintained during the reactor operation was proposed by evaluating not only core graphite oxidation but also carbon deposition and decarburization. It was identified when the chemical composition could not keep adequately, injection of 10 ppm carbon monoxide could effectively control the chemical composition to the designated stable area where the high-temperature materials could keep their structural integrity beyond the assumed duration. The proposed active chemistry control technology is expected to contribute economically to the purification systems of the future very high-temperature reactors.

High-Temperture Structural Analysis on a Small-Scale PHE Prototype Considering Mechanical Properties in the Heat-Affected Zone and in the Weld Zone

2012 ◽  
Author(s):  
Kee-Nam Song ◽  
Sung-Deok Hong ◽  
Hong-Yoon Park
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Structural Analysis ◽  
Performance Test ◽  
Weld Zone ◽  
Parent Material ◽  
Small Scale ◽  
Hastelloy X ◽  
Production Of Hydrogen ◽  
Gas Loop

PHE (Process Heat Exchanger) is a key component in transferring the high temperature heat generated from a VHTR (Very High Temperature Reactor) to the chemical reaction for massive production of hydrogen. A performance test on a small-scale PHE prototype made of Hastelloy-X is currently undergoing in a small-scale gas loop at the Korea Atomic Energy Research Institute. Previous researches on the high-temperature structural analysis of the small-scale PHE prototype had been performed using parent material properties over the whole region. In this study, high-temperature elastic structural analysis considering mechanical properties in the weld zone was performed and the analysis result was compared with previous researches.

scholarly journals Development of Plate-Fin Heat Exchanger for Intermediate Heat Exchanger of High-Temperature Gas Cooled Reactor

2010 ◽  
Vol 9 (2) ◽  
pp. 219-232 ◽  
Author(s):  
Yorikata MIZOKAMI ◽  
Toshihide IGARI ◽  
Keiichi NAKASHIMA ◽  
Fumiko KAWASHIMA ◽  
Noriyuki SAKAKIBARA ◽  
...  
Keyword(s):  
High Temperature ◽  
Heat Exchanger ◽  
Intermediate Heat Exchanger ◽  
High Temperature Gas
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