日本語フィールド
著者：岡本明夫, 有馬博史, 金政焄, 秋山泰有, 池上康之, 門出政則題名：プレート式蒸発器におけるアンモニア／水二成分混合媒体の局所沸騰熱伝達特性発表情報：日本冷凍空調学会論文集 巻: 26 号: 2 ページ: 131-139キーワード：Local Heat Transfer, Ammonia/Water Mixture, Plate Type Evaporator, OTEC, Visualization概要：抄録：Ocean thermal energy conversion (OTEC) and discharged thermal energy conversion (DTEC) are expected to be the next generation energy production systems. Both systems use a plate type evaporator， and ammonia or ammonia/water mixture as a working fluid．It is important to clarify heat transfer characteristic for designing efficient power generation systems．Measurements of local boiling heat transfer coefficients and visualization were performed for ammonia /water mixture (z = 0.9) on a vertical flat plate heat exchanger in a range of mass flux (7.5 - 15 kg/m2s), heat flux (15 - 23 kW/m2), and pressure (0.7 - 0.9 MPa). The result shows that in the case of ammonia /water mixture, the local heat transfer coefficients increase with an increase of vapor quality and mass flux, and decrease with an increase of heat flux, and the influence of the flow pattern on the local heat transfer coefficient is observed.英語フィールド
Author：Akio OKAMOTO, Hirofumi ARIMA, Jeong-Hun KIM, Hirokuni AKIYAMA, Yasuyuki IKEGAMI, Masanori MONDETitle：Characteristic of Local Boiling Heat Transfer of Ammonia/Water Binary Mixture on the Plate Type EvaporatorAnnouncement information: Vol: 26 Issue: 2 Page: 131-139Keyword：Local Heat Transfer, Ammonia/Water Mixture, Plate Type Evaporator, OTEC, VisualizationAn abstract：Ocean thermal energy conversion (OTEC) and discharged thermal energy conversion (DTEC) are expected to be the next generation energy production systems. Both systems use a plate type evaporator， and ammonia or ammonia/water mixture as a working fluid．It is important to clarify heat transfer characteristic for designing efficient power generation systems．Measurements of local boiling heat transfer coefficients and visualization were performed for ammonia /water mixture (z = 0.9) on a vertical flat plate heat exchanger in a range of mass flux (7.5 - 15 kg/m2s), heat flux (15 - 23 kW/m2), and pressure (0.7 - 0.9 MPa). The result shows that in the case of ammonia /water mixture, the local heat transfer coefficients increase with an increase of vapor quality and mass flux, and decrease with an increase of heat flux, and the influence of the flow pattern on the local heat transfer coefficient is observed.