多管式气泡泵设计

Design of a Multiple Tube Bubble Pump

以已有的关于气泡泵的实验及理论研究为基础,进行热力学计算,在单管气泡泵取最大直径为31 mm时,其提升量为39.23 g/s。为获得更高的气泡泵管内提升量,当整个单压吸收式制冷系统制冷量选取为3 k W时,相应的气泡泵内总流量为42.3 g/s,采用多管式设计并通过迭代计算确定出不同气泡泵管数目和与其对应的每根提升管输送管内的流量,选定初始的沉浸比,从而得到每根提升管的尺寸,根据气泡泵运行特性及两相流压降计算方法和气泡泵流动压头校核和性能公式,确定出多管式气泡泵结构参数:提升管为3根,每根提升管的直径为20.5 mm、长度为237 mm、沉浸比为0.67。

Based on the currently-available experimental and theoretical study of bubble pumps,the authors conducted a thermodynamic calculation. When the tube of a single tube bubble pump is chosen with its maximal diameter being 31 mm,its lifting flow rate is 39. 23 g / s. When the amount of the cooling energy consumed by a whole single pressure absorption type refrigeration system is chosen as 3 k W,to obtain an even larger lifting flow rate inside the tube of the bubble pump,the corresponding total flow rate inside the bubble pump will be 42. 3 g / s. By using a multiple tubedesign and through a iterative calculation,the flow rate inside the conveying tube of each lifting tubes in the bubble pump was determined and the initial submerging ratio was chosen,thus the dimensions of each lifting tube were obtained. According to the operation characteristics of the bubble pump,the two-phase flow calculation method and the flow head check and performance formulae,the structure of the multiple tube bubble pump was determined: lifting tubes total three,diameter of each lifting tube is 20. 5 mm,their length is 237 mm and the submerging ratio is 0. 67.