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원자력수소생산용 공정열교환기 개발을 위한 고온/고압 소형가스루프설계
홍성덕(S. D. Hong),오동석(D. S. Oh),김종호(J. H. Kim),김용완(Y. W. Kim),이원재(W. J. Lee),장종화(J. H. Chang) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
We designed a small scale gas loop that can simulate reference operating conditions, that is, temperature up to 950 ℃ and pressure up to 6㎫. Main objective of the loop is to screen the candidate process-heat-exchanger designs of very small capacity of 10~20㎾. We arranged the components of primary gas loop and secondary SO₃ loop. Design requirements are prepared for the safe design of a main heater, a hot-gas-duct and a process heat exchanger that is excluded a risk of a failure owing to the thermal stresses, the flow-induced-vibration or the acoustic vibration in both nitrogen and helium mediums. We determined a total pressure loss of the primary loop to 83 ㎪ and the minimum outer diameter of the loop pressure pipe to 90㎜ at hot location that will guarantee from a thermal failure. Very toxic SO₃ secondary loop is needed a scrubber and a SO₃ collector for safety and preventing a contamination of environment.
원자로수소생산을 위한 연결부품 실험용 소형 컴팩트 실험장치 개발
홍성덕(S. D. Hong),김종호(J. H. Kim),김찬수(C. S. Kim),김용완(Y. W. Kim),이원재(W. J. Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Very High Temperature Reactor (VHTR) has been selected as a high energy heat source for a nuclear hydrogen generation. The VHTR heat is transferred to a thermo-chemical hydrogen production process through an intermediate loop. Both Process Heat Exchanger and sulfuric acid evaporator provide the coupled components between the VHTR intermediate loop and hydrogen production module. A small scaled Compact Nuclear Hydrogen Coupled Components test loop is developed to simulate the VHTR intermediate loop and hydrogen production module. Main objective of the loop is to screening the candidates of NHDD (Nuclear Hydrogen Development and Demonstration) coupled components. The operating condition of the gas loop is a temperature up to 950℃ and a pressure up to 6.0㎫. The thermal and fluid dynamic design of the loop is dependent on the structures that enclose the gas flow, especially primary side that has fast gas velocity. We designed and constructed a small scale sulfuric acid experimental system which can simulate a part of the hydrogen production module also.
소형가스루프 시험조건에서 소형 공정열교환기 시제품의 고온구조해석
송기남,홍성덕,박홍윤,Song, Kee-nam,Hong, S-D,Park, H-Y 한국압력기기공학회 2012 한국압력기기공학회 논문집 Vol.8 No.1
A PHE (Process Heat Exchanger) is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR (Very High Temperature Reactor) to the chemical reaction that yields a large quantity of hydrogen. A small-scale PHE prototype made of Hastelloy-X is being tested in a small-scale gas loop at Korea Atomic Energy Research Institute. In order to properly evaluate the high-temperature structural integrity of the small-scale PHE prototype, it is very important to impose a proper constraint condition on its structural analysis model. For this effort, we tried to impose several constraint conditions on the structural analysis model and consequently fixed a proper and effective displacement constraints.
소형가스루프 시험조건에서 중형 공정열교환기 시제품의 고온구조해석
송기남,홍성덕,박홍윤,Song, Kee-nam,Hong, S-D,Park, H-Y 한국압력기기공학회 2012 한국압력기기공학회 논문집 Vol.8 No.1
A PHE (Process Heat Exchanger) in a nuclear hydrogen system is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR (Very High Temperature Reactor) to a chemical reaction that yields a large quantity of hydrogen. Korea Atomic Energy Research Institute has established a small-scale gas loop for the performance test on VHTR components and recently has manufactured a medium-scale PHE prototype made of Hastelloy-X. A performance test on the PHE prototype is scheduled in the gas loop. In this study, high-temperature structural analysis modeling, and macroscopic thermal and structural analysis of the medium-scale PHE prototype by imposing the established displacement boundary constraints in the previous research were carried out under the gas loop test condition. The results obtained in this study will be compared with performance test results.
송기남,이형연,홍성덕,박홍윤,Song, Kee-nam,Lee, H-Y,Hong, S-D,Park, H-Y 한국압력기기공학회 2010 한국압력기기공학회 논문집 Vol.6 No.1
PHE(Process Heat Exchanger) is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR(Very High Temperature Reactor) to the chemical reaction that yields a large quantity of hydrogen. Korea Atomic Energy Research Institute established the gas loop for the performance test of components, which are used in the VHTR, and they manufactured a PHE prototype to be tested in the loop. In this study, as part of the high-temperature structural-integrity evaluation of the PHE prototype, which is scheduled to be tested in the gas loop, we carried out high-temperature structural-analysis modeling, thermal analysis, and thermal expansion analysis of the PHE prototype. The results obtained in this study will be used to design the performance test setup for the PHE prototype.
송기남,이형연,홍성덕,박홍윤,Song, Kee-nam,Lee, H-Y,Hong, S-D,Park, H-Y 한국압력기기공학회 2011 한국압력기기공학회 논문집 Vol.7 No.2
PHE(Process Heat Exchanger) is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR(Very High Temperature Reactor) to the chemical reaction that yields a large quantity of hydrogen. Korea Atomic Energy Research Institute established a small-scale gas loop for the performance test of components, which are used in the VHTR, and they manufactured a PHE prototype made of Hastelloy-X to be tested in the small-scale gas loop. Results from the elastic structural analysis on the PHE prototype were reported in the previous article. In order to investigate the macroscopic structural characteristics and behavior of the PHE prototype under the test condition of the small-scale gas loop far more in detail, elastic-plastic high-temperature structural-analysis of the PHE prototype was carried out in this study.
배관 강성을 고려한 소형 공정열교환기 시제품에 대한 탄성 고온구조해석
송기남,강지호,홍성덕,박홍윤,Song, Kee-nam,Kang, J-H,Hong, S-D,Park, H-Y 한국압력기기공학회 2011 한국압력기기공학회 논문집 Vol.7 No.3
A PHE (Process Heat Exchanger) is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR (Very High Temperature Reactor) to the chemical reaction that yields a large quantity of hydrogen. A small-scale PHE prototype made of Hastelloy-X is being tested in a small-scale gas loop at Korea Atomic Energy Research Institute. In this study, as a part of the evaluation on the high-temperature structural integrity of the small-scale PHE prototype, we carried out macroscopic high-temperature structural analysis of the small-scale PHE prototype under the gas loop test conditions considering the pipeline stiffness.
주인철(I.C. Chu),홍성덕(S.D. Hong),윤영중(Y.J. Yun),송철화(C.-H. Song),천세영(S.Y. Chun) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
In the present study a new measurement technique has been developed, which uses an ultrasonic transmission signal<br/> in order to determine the vertical two phase flow pattern. The ultrasonic measurement system developed in the present<br/> study not only provides the measurement functions required for the determination of vertical two phase flow pattern but<br/> also makes the real time determination possible. The developed ultrasonic measurement system accurately determined<br/> the various vertical two phase flow patterns such as bubbly, slug, churn, annular flow etc. In addition to the<br/> determination of flow patterns, the qualitative information for each flow pattern can be obtained, which includes void<br/> fraction in bubbly flow, length of slug bubble and liquid tail characteristics in slug flow, and stable or transient<br/> condition of the flow patterns, etc.