Thermal design of helium cooled divertor for reliable operation
Thermal design of helium cooled divertor for reliable operation
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DOI：
10.1016/j.applthermaleng.2016.09.062
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发表时间：
2017-01
影响因子：
6.4
通讯作者：
Namkyu Lee;B. Kim;Taehwan Kim;Ji-Yeul Bae;H. Cho
中科院分区：
文献类型：
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作者：
Namkyu Lee;B. Kim;Taehwan Kim;Ji-Yeul Bae;H. Cho
核聚变是最有前途的能源，因为发电的燃料是丰富的，副产品是生态友好的，而不是其他发电。然而，发展核聚变工厂必须解决几个难题，包括DEMO（DEMOnstration nuclear fusion reactors），如超导系统，毯子，低温恒温器等。特别是偏滤器，因为要承受来自高温等离子体的过大的热通量（~ 10 MW/m2），所以是必不可少的部件之一。因此，开展大热流密度下偏滤器组件的热设计是核聚变装置发展的需要。我们调查热物理行为的对流传热和建议的原则操作变量，以决定适当的热设计偏滤器模块。基于简化的热回路，我们表明，所观察到的相关性可以预测偏滤器模块的热物理特性，并提出了可靠的热设计的先决条件，根据偏滤器模块的主要操作变量的热设计图。最后，我们揭示了套管的安全系数是建立偏滤器模块热设计的首要考虑因素。本文的研究将有助于偏滤器在核聚变装置中的发展和在高热通量高温装置中的应用。
Nuclear fusion is the promising energy sources because the fuels for power generation are abundant and by-products are eco-friendly rather than other power generations. However, there are several conundrums that must be solved for developing the nuclear fusion plants, including DEMO (DEMOnstration nuclear fusion reactors), such as superconducting system, blanket, cryostats and others. In particular, a divertor is one of essential components because of withstanding the excessive heat flux (∼10 MW/m2) from the high-temperature plasma. Therefore, it is necessary for thermal design of divertor module under tremendous heat flux to develop the nuclear fusion plants. We investigate thermophysical behavior by convective heat transfer and suggest principle operating variables to decide for appropriate thermal design for divertor module. Based on the simplified thermal circuit, we demonstrate that the observed correlation can predict thermophysical characteristics of the divertor module and present the prerequisites for reliable thermal design based on the thermal design maps in terms of principle operating variables of divertor module. Finally, we reveal that the safety factor of thimble is primary concern to establish thermal design of divertor module. The present study will contribute to the development of divertor in nuclear fusion plants and the applications for high heat flux and temperature devices.