Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink
As international maritime trade among countries increases, great efforts are being made to reduce the amount of greenhouse gases emitted from ships using conventional fossil fuels. A variety of environment-friendly power sources for ships are being considered, and nuclear energy is one of them. The...
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Elsevier
2024-01-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2092678224000074 |
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| author | Yong Hwan Yoo Han Koo Jeong Wooseong Park Soo Hyoung Kim Yong Hoon Jeong |
| author_facet | Yong Hwan Yoo Han Koo Jeong Wooseong Park Soo Hyoung Kim Yong Hoon Jeong |
| author_sort | Yong Hwan Yoo |
| collection | DOAJ |
| description | As international maritime trade among countries increases, great efforts are being made to reduce the amount of greenhouse gases emitted from ships using conventional fossil fuels. A variety of environment-friendly power sources for ships are being considered, and nuclear energy is one of them. The research described in this paper focuses on elemental technologies related to nuclear-powered ships rather than the nuclear reactor technology itself. Among those technologies, the Passive Residual Heat Removal System (PRHRS) of a nuclear-powered ship is studied to remove residual heat by using seawater as an alternative heat sink. New concept of PRHRS is proposed and it is named as SWC-PRHRS. SWC-PRHRS has two heat exchangers: one is for driving force and another is for dumping the most of residual heat to the sea. Numerical analysis and experimental studies are conducted to improve the performance of SWC-PRHRS. The numerical results show that most of the residual heat comes from a reactor core is eliminated by sea water cooling proving the concept of SWC-PRHRS is working properly without any operator intervention and additional water supply. Experimental studies are conducted based on the numerical analysis results. From the experimental results, it is found that the mass flow rate of SWC-PRHRS is very sensitive to the filling ratio of SWC-PRHRS and there are three distinctive filling ratio ranges. Through the experiment, it is confirmed that SWC-PRHRS is working efficiently with the lower mass flow rate and the smaller upper heat exchanger without any operator intervention. SWC-PRHRS could remove a large amount of residual decay heat from the ship's reactor and release it to the sea. Considering the size, weight, and exceptional heat removal capability of SWC-PRHRS, it is clear that SWC-PRHRS is well suited for marine application usage. |
| format | Article |
| id | doaj-art-a2e5931f7d52423eaba899b63224b0d1 |
| institution | Kabale University |
| issn | 2092-6782 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj-art-a2e5931f7d52423eaba899b63224b0d12024-12-25T04:21:06ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822024-01-0116100588Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sinkYong Hwan Yoo0Han Koo Jeong1Wooseong Park2Soo Hyoung Kim3Yong Hoon Jeong4Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea; Korea Atomic Energy Research Institute, Daejeon, Republic of KoreaDepartment of Naval Architecture and Ocean Engineering, Kunsan National University, Gunsan, Republic of Korea; Corresponding author.Korea Advanced Institute of Science and Technology, Daejeon, Republic of KoreaKorea Atomic Energy Research Institute, Daejeon, Republic of KoreaKorea Advanced Institute of Science and Technology, Daejeon, Republic of KoreaAs international maritime trade among countries increases, great efforts are being made to reduce the amount of greenhouse gases emitted from ships using conventional fossil fuels. A variety of environment-friendly power sources for ships are being considered, and nuclear energy is one of them. The research described in this paper focuses on elemental technologies related to nuclear-powered ships rather than the nuclear reactor technology itself. Among those technologies, the Passive Residual Heat Removal System (PRHRS) of a nuclear-powered ship is studied to remove residual heat by using seawater as an alternative heat sink. New concept of PRHRS is proposed and it is named as SWC-PRHRS. SWC-PRHRS has two heat exchangers: one is for driving force and another is for dumping the most of residual heat to the sea. Numerical analysis and experimental studies are conducted to improve the performance of SWC-PRHRS. The numerical results show that most of the residual heat comes from a reactor core is eliminated by sea water cooling proving the concept of SWC-PRHRS is working properly without any operator intervention and additional water supply. Experimental studies are conducted based on the numerical analysis results. From the experimental results, it is found that the mass flow rate of SWC-PRHRS is very sensitive to the filling ratio of SWC-PRHRS and there are three distinctive filling ratio ranges. Through the experiment, it is confirmed that SWC-PRHRS is working efficiently with the lower mass flow rate and the smaller upper heat exchanger without any operator intervention. SWC-PRHRS could remove a large amount of residual decay heat from the ship's reactor and release it to the sea. Considering the size, weight, and exceptional heat removal capability of SWC-PRHRS, it is clear that SWC-PRHRS is well suited for marine application usage.http://www.sciencedirect.com/science/article/pii/S2092678224000074Nuclear energyNuclear-powered shipPassive residual heat removal systemAir heat exchangerSeawater heat exchanger |
| spellingShingle | Yong Hwan Yoo Han Koo Jeong Wooseong Park Soo Hyoung Kim Yong Hoon Jeong Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink International Journal of Naval Architecture and Ocean Engineering Nuclear energy Nuclear-powered ship Passive residual heat removal system Air heat exchanger Seawater heat exchanger |
| title | Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| title_full | Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| title_fullStr | Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| title_full_unstemmed | Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| title_short | Study on the seawater cooled PRHRS of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| title_sort | study on the seawater cooled prhrs of a nuclear propulsion ship with the upper heat exchanger for driving force and the seawater heat exchanger as an ultimate heat sink |
| topic | Nuclear energy Nuclear-powered ship Passive residual heat removal system Air heat exchanger Seawater heat exchanger |
| url | http://www.sciencedirect.com/science/article/pii/S2092678224000074 |
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