日本語フィールド
著者：KIM Jeong-Hun, 有馬博史, 池上康之 読み: キムジョンフン、アリマヒロフミ、イケガミヤスユキ題名：鉛直平滑平板上でのアンモニアの局所強制対流沸騰熱伝達に関する基礎研究発表情報：日本冷凍空調学会論文集 巻: 24 号: 3 ページ: 217-226キーワード：Heat Transfer, Forced Convective Boiling, Local Heat Transfer Coefficient, Vertical Flat Plate, Ammonia, Lockhart-Martinelli Parameter, Modified Froude Number概要：抄録：In the present study, the fundamental experiments that investigate characteristics of local heat transfer in forced convective boiling on vertical flat plate with 2-mm channel height are taken to realize plate type compact evaporator for OTEC or STEC. The experiments are performed with ammonia as the working fluid. The experiments are also carried out with the following test conditions; saturated pressure = 0.7, 0.8, 0.9 MPa, mass flux = 7.5, 10, 15 kg/(m2•s), heat flux = 15, 20, 25 kW/m2 and inlet quality = 0.1 ~ 0.4 [-]. The result shows that the wall superheated temperature of forced convective boiling is lower than that of pool boiling. And the heat transfer coefficient increases with an increase in quality and the decrease in the local heat flux and saturated pressure for prescribed experimental conditions. However, local heat transfer coefficients are not affected by mass fluxes in the prescribed experimental conditions. An empirical correlation that can predict the local heat transfer coefficient on vertical flat plate within experimental conditions is also proposed.英語フィールド
Author：KIM Jeong-Hun, Hirofumi Arima, Yasuyuki IkegamiTitle：Fundamental Study of Local Heat Transfer in Forced Convective Boiling of Ammonia on Vertical Flat PlateAnnouncement information:Transactions of the JSRAE Vol: 24 Issue: 3 Page: 217-226Keyword：Heat Transfer, Forced Convective Boiling, Local Heat Transfer Coefficient, Vertical Flat Plate, Ammonia, Lockhart-Martinelli Parameter, Modified Froude NumberAn abstract：In the present study, the fundamental experiments that investigate characteristics of local heat transfer in forced convective boiling on vertical flat plate with 2-mm channel height are taken to realize plate type compact evaporator for OTEC or STEC. The experiments are performed with ammonia as the working fluid. The experiments are also carried out with the following test conditions; saturated pressure = 0.7, 0.8, 0.9 MPa, mass flux = 7.5, 10, 15 kg/(m2•s), heat flux = 15, 20, 25 kW/m2 and inlet quality = 0.1 ~ 0.4 [-]. The result shows that the wall superheated temperature of forced convective boiling is lower than that of pool boiling. And the heat transfer coefficient increases with an increase in quality and the decrease in the local heat flux and saturated pressure for prescribed experimental conditions. However, local heat transfer coefficients are not affected by mass fluxes in the prescribed experimental conditions. An empirical correlation that can predict the local heat transfer coefficient on vertical flat plate within experimental conditions is also proposed.