2018 Fiscal Year Final Research Report
Development of a thermal storage tank with directly heated moving particles for beam-down solar concentrator
| Project/Area Number |
16K06973
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | University of Miyazaki |
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Principal Investigator |
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| Research Collaborator |
TOMOMATSU Shigeki
KAWAMURA Ryuusuke
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 太陽熱 / 蓄熱 / 太陽集光装置 / 再生可能エネルギー |
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| Outline of Final Research Achievements |
A beam-down solar concentrator ( BDSC ) that concentrate the sunlight, downward from the tower top, is one of the solar towers.
In this study, a solar receiver with a thermal storage tank for BDSC was designed and constructed. Storage materials in the solar receiver are solid particles that are mechanically moved and are directly heated by the concentrated sunlight. An experiment using BDSC, adopted alumina balls as storage materials, reached 1570 ℃ of maximum temperature. It is found that the diameters and the kinds of material of the storage particles do not affect the efficiency of thermal storage. Nevertheless, the absorption of the storage material affects efficiency.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
ビームダウン式太陽集光装置（BDSC)は，下方向に太陽光を高倍率で集光することのできる装置である．この特徴を生かした蓄熱装置を開発し，実際にBDSCにより加熱実験を行った結果，1000℃以上の高温での顕熱蓄熱を可能にした．このことにより，高温作動流体を必要とするガスタービン駆動への応用が視野に入った．また，蓄熱の高温化は，熱機関を高効率に駆動することや，蓄熱装置のコンパクト化に貢献できることにも意義がある．
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