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URIhttp://ypir.lib.yamaguchi-u.ac.jp/fu/metadata/343
タイトルHeat Transeer Performance of Falling Film Type Plate-Fin Evaporator
作成者Ohara, Junichi
作成者ヨミオオハラ, ジュンイチ
作成者別表記大原, 順一
著者キーワードMinichannels
Heat transfer
Plate Fin Evaporator
Falling film
資料タイプtext
ファイル形式application/pdf
内容記述(抄録等)The characteristics of heat transfer and flow patterns are investigated experimentally for the vertical falling film evaporation of pure refrigerant HCFC123 in a rectangular minichannels consisting of offset strip fins. The refrigerant liquid is uniformly supplied to the channel through a distributor. The liquid flowing down vertically is heated electrically from the rear wall of the channel and evaporated. To observe the flow patterns during the evaporation process directly, a transparent vinyl chloride resin plate is placed as the front wall. The experimental parameters are as follows: the mass velocity G = 28~70 kg/(m^2s), the heat flux q = 20~50 kW/m^2 and the pressure P ≈ 100 kPa. It is clarified that the heat transfer coefficient a depends on G and q in the region of vapor quality x ≥ 0.3 while there is little influence of G and q in the region x ≤ 0.3 . From the direct observation using a high speed video camera and a digital still camera, flow patterns are classified into five types. Then the empirical correlation equations for evaporation heat transfer coefficient on a vertical falling film plate fin evaporator with minichannels are proposed. From the physical model to evaluate the heat transfer coefficient of the minichannel surface with fins, the characteristics of fin efficiency is clarified that the average value of fin efficiency is about 0.6 and the distributive characteristics of fin efficiency isroughly inverse of heat transfer coefficient characteristics.
出版者水産大学校
出版者ヨミスイサン ダイガッコウ
Nii資料タイプ紀要論文
本文言語eng
ISSN0370-9361
掲載誌名水産大学校研究報告
64
4
開始ページ283
終了ページ291
発行日2016-03
著者版/出版社版出版社版
リポジトリIDNF0064409
ファイル64-4-283-291.pdf ( 2.4MB ) 公開日 2016-11-08
査読の有無査読あり
地域区分水産大学校