Abstract
The intermediate heat exchanger (IHX) of a very high temperature reactor (VHTR) transfers 950°C heat generated from the VHTR to a hydrogen production plant. The korea atomic energy research institute (KAERI) has manufactured a lab-scale printed circuit heat exchanger (PCHE) prototype made of SUS316L, under consideration, as a candidate. In this study, as a part of a high temperature structural integrity evaluation of the lab-scale PCHE prototype, a macroscopic structural behavior analysis including structural analysis modeling and a thermal/elastic structural analysis was carried out under the test conditions of a helium experimental loop (HELP) as a precedent study for a performance test. The results obtained in this study will be compared with the test results of the lab-scale PCHE prototype.
Highlights
Hydrogen is considered as a promising future energy solution, as it is clean, abundant, and storable, and has a high energy density
Researches to demonstrate the massive production of hydrogen using a very high temperature reactor (VHTR) designed for operation at up to 950∘C have been actively carried out worldwide including USA, Japan, China, France, and the Republic of Korea (ROK) [1]
The intermediate heat exchanger (IHX) of the VHTR transfers 950∘C heat generated from the VHTR to a hydrogen production plant through a hot gas duct
Summary
Hydrogen is considered as a promising future energy solution, as it is clean, abundant, and storable, and has a high energy density. Its name is derived from the procedure used to manufacture the flat metal plates that form the core of the heat exchanger which is done through chemical milling. KAERI has manufactured a lab-scale PCHE prototype made of SUS316L to be tested in HELP. To investigate the macroscopic structural characteristics and behavior of a lab-scale PCHE prototype welded to the chambers under the test conditions of HELP, finite element (FE) modeling, a thermal analysis, and a structural analysis/integrity evaluation on the PCHE prototype were conducted as a precedent study for performance test when considering the base material properties of the SUS316L plate. A structural integrity evaluation is carried out considering the weld material properties of the SUS316L plate
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