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RISS 인기검색어
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- 저자 : Nandy Putra (검색결과 2 건)
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Iwan Setyawan,Nandy Putra,Imansyah Ibnu Hakim,Ridho Irwansyah 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.8
Loop heat pipe (LHP) is an effective two-phase heat transfer device that utilizes evaporation and condensation of a working fluid. LHP is widely used in a passive cooling system, highly reliable and a very high thermal conductive device. However, extreme power density can cause dry-out in the evaporator section of LHP and might hinder the performance of the cooling system. The purpose of this research is to design and manufacture a new prototype of LHP by modifying the conventional LHP. The modification was performed by adding a diaphragm pump, called hybrid loop heat pipe (HLHP). The experimental results show that the installation of pumps in the modified LHP was able to prevent the occurrence of a dry out and reduce the operating temperature. Under a constant conductance mode, the pump was activated for 20 minutes and succeded in forcing the system to a new stable condition with a significant temperature drop. These results indicate that HLHP is very promising as a two-phase cooling system that can be proposed for devices that produce high heat flux.
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Mukhsinun Hadi Kusuma,Nandy Putra,Anhar Riza Antariksawan,Susyadi,Ficky Augusta Imawan 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.3
The decay heat that is produced by nuclear reactor spent fuel must be cooled in a spent fuelstorage pool. A wickless heat pipe or a vertical two-phase closed thermosyphon (TPCT) isused to remove this decay heat. The objective of this research is to investigate the thermalperformance of a prototype model for a large-scale vertical TPCT as a passive coolingsystem for a nuclear research reactor spent fuel storage pool. An experimental investigationand numerical simulation using RELAP5/MOD 3.2 were used to investigate the TPCTthermal performance. The effects of the initial pressure, filling ratio, and heat load wereanalyzed. Demineralized water was used as the TPCT working fluid. The cooled water wascirculated in the water jacket as a cooling system. The experimental results show that thebest thermal performance was obtained at a thermal resistance of 0.22℃/W, the lowestinitial pressure, a filling ratio of 60%, and a high evaporator heat load. The simulationmodel that was experimentally validated showed a pattern and trend line similar to thoseof the experiment and can be used to predict the heat transfer phenomena of TPCT withvarying inputs.
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