• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.240-247
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• 2002

복수기의 원활한 열교환에 필요한 냉각수를 공급하기 위해 순환수펌프는 해수를 끌어들이는 역할을 한다. 각종 해양생물이나 이물질 등으로 인해 순환수펌프의 작동이 멈추는 경우가 간헐적으로 발생하고 있는 데, 이렇게 되면 복수기 튜브 쪽으로 유입되는 순환수 유량은 정상상태보다 줄어들게 된다. 이를 무시하고 원전터빈을 계속 고출력으로 가동시키면 복수기 내부의 전공도가 악화되어 작동이 정지되는 상황을 맞을 수 있으므로 터빈출력을 적정한 수준으로 낮추는 작업이 필요하다. 본 연구는 순환수펌프의 작동수 및 해수온도를 고려하여 터빈의 적정출력을 산정하고 이를 도표화하여 제시하였다. 분석결과를 기존의 운전데이터와 비교검토한 결과 대체로 일치하고 있어 운전조건을 안정적으로 유지하는 데 도움이 될 전망이다.

• Defense and Technology
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• no.6 s.244
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• pp.40-47
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• 1999

모든 타이타늄 합금은 해수의 흐름에 잘 견디어 진흙이 쌓인 해수에서 4~5m/sec의 속도까지 erosion corrosion에 대해 잘 견딘다. Grade 5 합금처럼 경도가 높을수록, 강도가 높을수록 최적의 erosion 및 cavitation 저항을 보유하므로 극히 중요한 핵심부품인 Hydrofoil부품, 추진부품, 프로펠러, 펌프 등 해수의 심한 부딪힘 등 erosion corrosion을 받는 부품에 대해 아주 매력적인 재료로 고려되고 있다

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.10a
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• pp.95-96
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• 2009

• The Journal of the Acoustical Society of Korea
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• v.26 no.6
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• pp.286-292
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• 2007

The dominant source of noise in a sea-connected piping system is usually due to a seawater cooling pump which circulates seawater to operate onboard equipments normally, and so its water-borne noise with some tonal frequencies should be reduced using proper silencers. In order to obtain the transmission loss of water-borne noise silencers experimentally the present paper suggests a transfer function technique that acoustic wave in the piping system is decomposed into its incident and transmitted components when the reflection at the termination of the system exists. Good agreement in the interested frequency range with theory and the proposed technique shows the validity of the technique.

• 유체기계공업학회:학술대회논문집
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• 2002.12a
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• pp.543-547
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• 2002

• 유체기계공업학회:학술대회논문집
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• 2005.12a
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• pp.645-649
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• 2005

In this study, redesign of a vaporizer sea-water pump has been carried out using computational fluid dynamics. The flow field of the specified pump model is simulated and analyzed. In the flow analysis full pump model has been used, and multi-block grids are employed to solve the governing equations. In order to improve pump efficiency, systematic redesign has been performed to remove the flow recirculation near the hub of the diffuser vanes. The modified model shows about 4 % improvement in pump efficiency compared to the given model.

• The KSFM Journal of Fluid Machinery
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• v.14 no.5
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• pp.12-17
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• 2011

The seawater lift pump system is responsible for maintaining the open canal level to provide the suction flow of circulating water pump at the set point. The objective of this paper is to design a 2-stage mixed flow pump (for seawater lifting) by inverse design method and to evaluate the overall performance and the local flow fields of the pump by using a commercial CFD code. Rotating speed of the impeller is 1,750 rpm with the flow rate of 2,700 $m^3$/h. Finite volume method with structured mesh and realized k-${\varepsilon}$ turbulent model is used to guaranty more accurate prediction of turbulent flow in the pump impeller. The numerical results such as static head, brake horse power and efficiency of the mixed flow pump are compared with the design data. The simulated results are good agreement with the design data less 3% error.

• 한국전산유체공학회:학술대회논문집
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• 2011.05a
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• pp.556-560
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• 2011

The seawater lift pump system is responsible for maintaining the open canal level to provide the suction flow of circulating water pump at the set point. The objective of this paper is to design a 2-stage mixed flow pump(for seawater lifting) by inverse design and to evaluate the overall performance and the local flow fields of the pump by using a commercial CFD code. Rotating speed of the impeller is 1,750 rpm with the flow rate of 2,700 $m^3/h$. Finite volume method with structured mesh and Realizable ${\kappa}-{\varepsilon}$ turbulent model is used to guaranty more accurate prediction of turbulent flow in the pump impeller. The numerical results such as static head brake horse power and efficiency of the mixed flow pump are compared with the reference data. Also, the periodic condition calculation method for the mixed flow pump was carried out in order to investigate the pump performance characteristics with the modification of impeller geometry.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.44 no.12
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• pp.88-92
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• 2015

• Plant Journal
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• v.3 no.4
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• pp.18-25
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• 2007