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구형 촉매가 삽입된 공정열교환기 유동채널의 압력강하 실험
홍성덕(Sung Deok Hong),서동운(Dong Un Seo),김찬수(Chan Soo Kim),김민환(Min Hwan Kim) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
A process heat exchanger (PHE) provides an interface between the nuclear heat and the hydrogen production process. The SO3 gas is heated and decomposed into SO2 and O2 in the PHE. The SO3 flow channels have enough space to be filled with 1-4mm diameter catalysts. we carried out the pressure drop experiments on a flow channel filled with ball shaped catalysts. The test section simulates a single channel of the PHE secondary side plate-fin channel. The experimental results compared well with the known pressure drop correlations and a numerical analysis, respectively.
김찬수(Chan-Soo Kim),홍성덕(Sung-Deok Hong),서동운(Dong-Un Seo),김용완(Yong-Wan Kim),이원재(Won Jae Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
When a thermocouple is placed in a high temperature gas-flow stream, the measured temperature could be biased from the true gas temperature due to a large radiation heat loss from a thermocouple surface to its surroundings. In this study, two thermocouples of unequal diameters with 1/8 inch and 1/16 inch are used to correct the radiation effect. The method is called the reduced radiation error (RRE). The preliminary test results show that the radiation and the sheath conduction cannot be negligible for the gas temperature measurement. To minimize the sheath conduction effect, all the thermocouples will have a grounded junction and 1/8 inch thermocouple will be replaced with 1 ㎜ thermocouples. In addition, the computational fluid dynamics code analysis shows that there is a negligible temperature difference between the positions where the thermocouples were installed.