抄録
Herein, a measuring device was constructed to obtain condensation heat transfer characteristics at mass flow rates below 100 kg/(m2·s) for a 1 × 1 mm2 flow path constituting a flat multiport heat transfer tube. The condensation heat transfer characteristics of HFC134a were experimentally determined under flow rate conditions including low mass rate of 40 kg/(m2·s). The condensation heat transfer coefficient in a single tube was partly different from that observed in a flat multiport tube. Also, we found that the smaller the flow rate (or the smaller the heat flow rate), the higher the heat transfer coefficient becomes. In the low quality range, as the vapor quality decreased, the smaller the flow rate, the higher the maximum value with high quality. This feature was remarkable when the heat flux was small. Regarding the tendency of the single tube to reach the local maximum value of the heat transfer coefficient in the low quality range, the region where the slug flow occurs corresponds well to the quality region where the condensation heat transfer shows a local maximum, with reference to what has been observed in previous studies.
| 元の言語 | 英語 |
|---|---|
| 出版物ステータス | 出版済み - 1 1 2018 |
| イベント | 9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018 - Sapporo, Hokkaido, 日本 継続期間: 6 10 2018 → 6 13 2018 |
その他
| その他 | 9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018 |
|---|---|
| 国 | 日本 |
| 市 | Sapporo, Hokkaido |
| 期間 | 6/10/18 → 6/13/18 |
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All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Mechanical Engineering
これを引用
Experiment on condensation heat transfer of HFC134a in a horizontal single rectangular mini-channel. / Matsumoto, Takashi; Arata, Yohei; Miyata, Kazushi; Hamamoto, Yoshinori; Mori, Hideo.
2018. 論文発表場所 9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018, Sapporo, Hokkaido, 日本.研究成果: 会議への寄与タイプ › 論文
}
TY - CONF
T1 - Experiment on condensation heat transfer of HFC134a in a horizontal single rectangular mini-channel
AU - Matsumoto, Takashi
AU - Arata, Yohei
AU - Miyata, Kazushi
AU - Hamamoto, Yoshinori
AU - Mori, Hideo
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Herein, a measuring device was constructed to obtain condensation heat transfer characteristics at mass flow rates below 100 kg/(m2·s) for a 1 × 1 mm2 flow path constituting a flat multiport heat transfer tube. The condensation heat transfer characteristics of HFC134a were experimentally determined under flow rate conditions including low mass rate of 40 kg/(m2·s). The condensation heat transfer coefficient in a single tube was partly different from that observed in a flat multiport tube. Also, we found that the smaller the flow rate (or the smaller the heat flow rate), the higher the heat transfer coefficient becomes. In the low quality range, as the vapor quality decreased, the smaller the flow rate, the higher the maximum value with high quality. This feature was remarkable when the heat flux was small. Regarding the tendency of the single tube to reach the local maximum value of the heat transfer coefficient in the low quality range, the region where the slug flow occurs corresponds well to the quality region where the condensation heat transfer shows a local maximum, with reference to what has been observed in previous studies.
AB - Herein, a measuring device was constructed to obtain condensation heat transfer characteristics at mass flow rates below 100 kg/(m2·s) for a 1 × 1 mm2 flow path constituting a flat multiport heat transfer tube. The condensation heat transfer characteristics of HFC134a were experimentally determined under flow rate conditions including low mass rate of 40 kg/(m2·s). The condensation heat transfer coefficient in a single tube was partly different from that observed in a flat multiport tube. Also, we found that the smaller the flow rate (or the smaller the heat flow rate), the higher the heat transfer coefficient becomes. In the low quality range, as the vapor quality decreased, the smaller the flow rate, the higher the maximum value with high quality. This feature was remarkable when the heat flux was small. Regarding the tendency of the single tube to reach the local maximum value of the heat transfer coefficient in the low quality range, the region where the slug flow occurs corresponds well to the quality region where the condensation heat transfer shows a local maximum, with reference to what has been observed in previous studies.
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M3 - Paper
ER -