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Effect of SHe temperature on Cool-down Speed in JT-60SA CS module
https://repo.qst.go.jp/records/81569
https://repo.qst.go.jp/records/8156946130770-4774-4f3a-9500-e4c371438eac
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-01-06 | |||||
| タイトル | ||||||
| タイトル | Effect of SHe temperature on Cool-down Speed in JT-60SA CS module | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Sonoda, Shogo
× Sonoda, Shogo× Nakamura, Kazuya× Hirose, Yuta× Natsume, Kyohei× Fukui, Kazuma× Murakami, Haruyuki× Kizu, Kaname× Hamada, Kazuya× Kyohei, Natsume× Kazuma, Fukui× Haruyuki, Murakami× Kaname, Kizu× Kazuya, Hamada |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The JT-60SA central solenoid (CS), which consists of four stacked modules, is cooled to an operating temperature of 4.5 K by supercritical helium (SHe). During cool-down from room temperature to 4.5 K, in order to avoid a damage on the coil, it is required to reduce thermal stress due to temperature difference in the coil. In the cool-down operation, the CS needs to control the maximum temperature difference in the longitudinal direction of the cable-in-conduit (CIC) conductor below 40 K. However, since that could damage the coil, correctly estimating the temperature distribution in the conductor is important for ensuring the cooldown operation is performed safely. In the present study, the JT- 60SA CS module was prepared and the inlet and outlet temperatures, as well as the SHe mass flow rate, were measured until the CS module was cooled to operating temperature, after which a CS module simulation was performed in order to determine the effect of the inlet temperature on the cool-down speed. From the simulation results, it was concluded that the average cool-down speed was 0.73 K/h and the CS module reached 80 K in approximately 8.3 days while maintaining the maximum temperature difference within 40 K. Furthermore, the temperature difference between the inlet and outlet was kept within 25 K in order to limit the thermal stress. Taken together, the results of our analyses provide fundamental data that can be used to evaluate the safe cool-down operation of the coil and thus protect the coil systems. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Applied Superconductivity Conference 2020 (ASC2020) | |||||
| 発表年月日 | ||||||
| 日付 | 2020-10-24 | |||||
| 日付タイプ | Issued | |||||
