書誌事項
- タイトル別名
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- Transient Heat Transfer Around a Horizontal Cylinder while Frosting
- チャクソウ オ トモナウ スイヘイ エンチュウ マワリ ノ カト ネツ デンタツ
- 公開日
- 2008
- DOI
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- 10.11322/tjsrae.25.79
- 公開者
- 公益社団法人 日本冷凍空調学会
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説明
This study examined transient heat transfer characteristics while frosting in order to clarify heat transfer mechanism by which a high heat flux is obtained at the frosting initial stage. For the purpose, a high-precise temperature measurement was carried out in the frost layer and outside of a horizontal cylinder. The thermocouples for the temperature measurement were composed of a chromel wire of 0.1 diameter and several constantan wires of 0.05mm diameter. The chromel wire was welded on the surface of the horizontal cylinder, and several constantan wires were welded in about a 1mm interval on the surface of the chromel wire. As a result, the surface temperature of the frost layer proportionally increased with the increase in the thickness of the frost layer. The time mean value of the measured local Nusselt number decreased in order of the value in the upper part of the cylinder, intermediate and lower parts, were respectively 11.5, 7.5 and 6.0. The measured thermal conductivity of the frost layer rose with the increase in the thickness of the frost layer, and the value was within 0.04-0.12 W/mK.
収録刊行物
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- 日本冷凍空調学会論文集
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日本冷凍空調学会論文集 25 (2), 79-86, 2008
公益社団法人 日本冷凍空調学会
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詳細情報 詳細情報について
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- CRID
- 1390282679643213056
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- NII論文ID
- 10021168867
- 130004566131
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- NII書誌ID
- AA11125910
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- ISSN
- 2185789X
- 13444905
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- NDL書誌ID
- 9566435
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDLサーチ
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可