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Song K.-N.,Korea Atomic Energy Research Institute | Hong S.-D.,Korea Atomic Energy Research Institute | Park H.-Y.,AD Solution
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2012

A process heat exchanger (PHE) in a nuclear hydrogen system is a key component for transferring the considerable heat generated in a very high temperature reactor (VHTR) to a chemical reaction that yields a large quantity of hydrogen. A performance test on a medium-scale PHE prototype made of Hastelloy®-X is scheduled in a small-scale gas loop at the Korea Atomic Energy Research Institute. In this study, as a preliminary study before carrying out the performance test in the gas loop, high-temperature structural analysis modeling and macroscopic thermal and structural analysis of the medium-scale PHE prototype by imposing the established displacement boundary constraints were carried out under the gas loop test condition. The results obtained in this study will be compared with the performance test results of the medium-scale PHE prototype in the gas loop. © 2012 The Korean Society of Mechanical Engineers. Source


Song K.-N.,Korea Atomic Energy Research Institute | Hong S.-D.,Korea Atomic Energy Research Institute | Park H.-Y.,AD Solution
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2012

A process heat exchanger (PHE) in a nuclear hydrogen system is a key component for transferring the considerable heat generated in a very high temperature reactor (VHTR) to a chemical reaction that yields a large quantity of hydrogen. A performance test on a small-scale PHE prototype made of Hastelloy-X is underway in a smallscale gas loop at the Korea Atomic Energy Research Institute. Previous research on the high-temperature structural analysis of the small-scale PHE prototype had been performed using base material properties. In this study, a hightemperature structural analysis considering the mechanical properties in the weld zone was performed, and the obtained results were compared with those of the previous research. © 2012 The Korean Society of Mechanical Engineers. Source


Song K.-N.,Korea Atomic Energy Research Institute | Hong S.-D.,Korea Atomic Energy Research Institute | Park H.-Y.,AD Solution
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2012

A process heat exchanger (PHE) in a nuclear hydrogen system is a key component that transfers the large amount of heat generated in a very high temperature reactor (VHTR) to a chemical reaction that yields a large quantity of hydrogen. A performance test on a small-scale and a medium-scale PHE prototype made of Hastelloy®-x being conducted on in a small-scale nitrogen gas loop at the Korea Atomic Energy Research Institute. Previous research on the macroscopic high-temperature structural analysis of PHE prototypes had been performed using base material properties owing to a lack of weld material properties. In this study, macroscopic high-temperature structural analyses considering the weld material properties were performed and the results were compared with those of a previous study. © 2011 The Korean Society of Mechanical Engineers. Source


Song K.N.,Korea Atomic Energy Research Institute | Hong S.D.,Korea Atomic Energy Research Institute | Park H.Y.,AD Solution
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2011

A PHE (Process Heat Exchanger) is a key component required to transfer heat energy of 950°C generated in a VHTR (Very High Temperature Reactor) to a chemical reaction that yields a large quantity of hydrogen. A small-scale PHE prototype made of Hastelloy-X was scheduled for testing in a small-scale gas loop at the Korea Atomic Energy Research Institute. In this study, as a part of the evaluation of the high-temperature structural integrity of the PHE prototype, high-temperature structural analysis modeling, and macroscopic thermal and elastic-plastic structural analysis of the PHE prototype were carried out under the gas-loop test conditions as a preliminary qwer123$study before carrying out the performance test in the gas loop. The results obtained in this study will be used to design the performance test setup for the modified PHE prototype. © 2011 The Korean Society of Mechanical Engineers. Source


Song K.N.,Korea Atomic Energy Research Institute | Lee H.Y.,Korea Atomic Energy Research Institute | Hong S.D.,Korea Atomic Energy Research Institute | Park H.Y.,AD Solution
Transactions of the Korean Society of Mechanical Engineers, A | Year: 2011

The IHX (intermediate heat exchanger) of a VHTR (very high-temperature reactor) is a core component that transfers the high heat generated by the VHTR at 950°C to a hydrogen production plant. Korea Atomic Energy Research Institute manufactured a small-scale prototype of a PCHE (printed circuit heat exchanger) that was being considered as a candidate for the IHX. In this study, as a part of high-temperature structural integrity evaluation of the small-scale PCHE prototype, we carried out high-temperature structural analysis modeling and macroscopic thermal and elastic structural analysis for the small-scale PCHE prototype under small-scale gas-loop test conditions. The modeling and analysis were performed as a precedent study prior to the performance test in the small-scale gas loop. The results obtained in this study will be compared with the test results for the small-scale PCHE. Moreover, these results will be used in the design of a medium-scale PCHE prototype. © 2011 The Korean Society of Mechanical Engineers. Source

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