日本語フィールド
著者：有馬博史，岡本明夫，池上康之 読み: アリマヒロフミ、オカモトアキオ、イケガミヤスユキ題名：鉛直平滑平板におけるアンモニア／水混合媒体を用いた強制対流沸騰熱伝達の組成による影響発表情報：日本冷凍空調学会 年次大会 2008 ページ: B331キーワード：Ammonia/water, Heat transfer coefficient, Forced convective boiling, Plate heat exchanger, Correlation概要：抄録：In the small thermal energy conversion such as ocean thermal energy conversion, the ammonia/water and the plate type evaporator is used as a working fluid and a heat exchanger, respectively. Improvement of the heat transfer in a plate type evaporator is indispensable to improvement in thermal efficiency of small thermal energy conversion. Moreover, it is necessary to clarify the heat transfer characteristic of an ammonia/water. In this study, heat transfer on forced convective boiling was measured using the ammonia/water of different composition (z = 0.95, 0.99). In addition, we compared the boiling heat transfer coefficient in different composition. The result shows that in case of ammonia/water mixture, the local heat transfer coefficients increases with an increase in vapor quality. In addition, heat transfer coefficient of mixture is smaller than that of pure ammonia except for 99% mixture. Moreover, an empirical correlation of heat transfer on forced convective boiling was also derived.英語フィールド
Author：Hirofumi ARIMA, Akio OKAMOTO, Yasuyuki IKEGAMITitle：Effect of Ammonia/Water Mixture Composition on the Local Heat Transfer in
Forced Convective Boiling on the Vertical Flat PlateAnnouncement information: Page: B331Keyword：Ammonia/water, Heat transfer coefficient, Forced convective boiling, Plate heat exchanger, CorrelationAn abstract：In the small thermal energy conversion such as ocean thermal energy conversion, the ammonia/water and the plate type evaporator is used as a working fluid and a heat exchanger, respectively. Improvement of the heat transfer in a plate type evaporator is indispensable to improvement in thermal efficiency of small thermal energy conversion. Moreover, it is necessary to clarify the heat transfer characteristic of an ammonia/water. In this study, heat transfer on forced convective boiling was measured using the ammonia/water of different composition (z = 0.95, 0.99). In addition, we compared the boiling heat transfer coefficient in different composition. The result shows that in case of ammonia/water mixture, the local heat transfer coefficients increases with an increase in vapor quality. In addition, heat transfer coefficient of mixture is smaller than that of pure ammonia except for 99% mixture. Moreover, an empirical correlation of heat transfer on forced convective boiling was also derived.