書誌事項
- タイトル別名
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- A Comparison of Heat Transfer Coefficients for Condensation of CFC-11 and HCFC-123 on an In-Line Bundle of Horizontal Finned Tubes.
- スイヘイ フィンツキキカン ノ ゴバンモクカングン ニ オケル CFC-11
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This paper presents a comparison of measured condensation heat transfer coefficients for refrigerant CFC-11 and its proposed replacement HCFC-123 flowing down a 3×15 (columns×rows) in-line bundle of horizontal finned tubes. The vapor velocity at the tube bundle inlet (based on minimum flow cross section) ranged from 0.9 to 10 m/s, and the condensation temperature difference from 1.3 to 19K. Heat transfer measurements were made on a row-by-row basis. Generally, the heat transfer coefficient for HCFC-123 was about 10% lower than that for CFC-11. The heat transfer enhancement due to vapor shear was much smaller than that in the case of a smooth tube bundle. At a high vapor velocity, the enhancement was most significant for the top row and decreased sharply with increasing row number. The decrease in the heat transfer coefficient due to condensate inundation was also much smaller for the finned tube bundle. The measured heat transfer coefficient for the smallest vapor velocity agreed well with the theoretical prediction for a stagnant vapor.
収録刊行物
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- 日本機械学会論文集B編
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日本機械学会論文集B編 59 (561), 1672-1677, 1993
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001205895035136
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- NII論文ID
- 110002392003
- 130004220736
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- NII書誌ID
- AN00187441
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- ISSN
- 18848346
- 03875016
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- NDL書誌ID
- 3822646
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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
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可