液化石油气降压时的过热与沸腾延迟

The Superheat and Boiling Delay of LPG during Depressurization

分析了非平衡相交偏离平衡相变时克劳修斯一克拉贝龙方程的特性,提出了一个综合考虑气泡形成生长与液体表面蒸发等因素的计算饱和液体降压时的过热与沸腾延迟的模型,用该模型计算了不同初始温度(压力)和不同降压速率时液化石油气储罐的不同降压特性。液体的过热度、沸腾延迟量和延时量均随初始温度的升高而减小,随降压速率的增大而增大。

The deviation of non-equilibrium phase change from the Clapeyron-Clausius Equation for equilibrium phase change is analyzed. A model for determination of the superheat and boiling delay of saturated liquids during depressurization is proposed, which takes bubble generation, bubble growth and liquid surface evaporation into consideration. Various depressurization aspects of the LPG tanks at different initial temperature (pressure) and different depressurizing rate are calculated with this model. The superheat temperature, boiling delay mass and delay time decrease when the initial temperature rises,and increase as the de-pressurizing rate increases.