The organic Rankine cycle (ORC) is an effective way to recycle low temperature exhaust heat but pump for the ORC has several disadvantages such as great difficulty in manufacturing, easily-invited cavitations, low e...The organic Rankine cycle (ORC) is an effective way to recycle low temperature exhaust heat but pump for the ORC has several disadvantages such as great difficulty in manufacturing, easily-invited cavitations, low efficiency and high cost. Gas-liquid two-phase injector is a device without moving parts, in which steam is used to drive cold liquid from a pressure lower than the primary steam to a pressure higher than the primary steam. In this paper, the mechanical circulation pump was replaced with a gas-liquid injector. The effect of the evaporate temperature for the system was studied with the organic fluid R123. While this novel ORC can not only improves the energy utilization, but also be suitable for some occasions without power.展开更多
对液体中心型同轴离心式单、双喷嘴喷雾特性开展了实验研究。采用高速摄影捕捉瞬态喷雾过程,通过Matlab程序获取了相应雾化锥角并与单喷嘴进行对比;采用激光粒度仪测量了双喷嘴近场区域液雾索泰尔平均直径(Sauter mean diameter,SMD),...对液体中心型同轴离心式单、双喷嘴喷雾特性开展了实验研究。采用高速摄影捕捉瞬态喷雾过程,通过Matlab程序获取了相应雾化锥角并与单喷嘴进行对比;采用激光粒度仪测量了双喷嘴近场区域液雾索泰尔平均直径(Sauter mean diameter,SMD),借此分析了单喷嘴与双喷嘴雾化锥角产生差异的机理。结果表明:随着气液比的增大,双喷嘴较单喷嘴的雾化锥角增加;双喷嘴间形成的复杂湍流区致使喷嘴间索泰尔平均直径小于喷嘴外侧;喷嘴间粒径较小,易受到湍流区的卷吸作用,致使两喷嘴内侧喷雾锥角增大。展开更多
文摘The organic Rankine cycle (ORC) is an effective way to recycle low temperature exhaust heat but pump for the ORC has several disadvantages such as great difficulty in manufacturing, easily-invited cavitations, low efficiency and high cost. Gas-liquid two-phase injector is a device without moving parts, in which steam is used to drive cold liquid from a pressure lower than the primary steam to a pressure higher than the primary steam. In this paper, the mechanical circulation pump was replaced with a gas-liquid injector. The effect of the evaporate temperature for the system was studied with the organic fluid R123. While this novel ORC can not only improves the energy utilization, but also be suitable for some occasions without power.
文摘对液体中心型同轴离心式单、双喷嘴喷雾特性开展了实验研究。采用高速摄影捕捉瞬态喷雾过程,通过Matlab程序获取了相应雾化锥角并与单喷嘴进行对比;采用激光粒度仪测量了双喷嘴近场区域液雾索泰尔平均直径(Sauter mean diameter,SMD),借此分析了单喷嘴与双喷嘴雾化锥角产生差异的机理。结果表明:随着气液比的增大,双喷嘴较单喷嘴的雾化锥角增加;双喷嘴间形成的复杂湍流区致使喷嘴间索泰尔平均直径小于喷嘴外侧;喷嘴间粒径较小,易受到湍流区的卷吸作用,致使两喷嘴内侧喷雾锥角增大。