纸机干燥部开式供热系统中喷射式热泵的结构分析

Optimal Design for Ejector Heat Pump Used in a Novel Open-Cycle Paper Machine System

借助PHOENICS软件平台 ,通过求解二维N S方程 ,模拟分析了喷射式热泵内部复杂的流动情况。从机理上解释了激波形成的条件 ,及其对喷射式热泵性能的影响。通过调整喷射式热泵结构 ,避免了吸收室内回流区的形成 ,从而将喷射系数提高 4 %。

For solving the problem of condensate slugged in drying cylinder,a novel open- cycle paper machine system assisted by ejector heat pump is designed.In order to enhance the COP of the key component of the novel system-ejector heat pump,two -dimensional Navior-Stokes equations are solved to obtain better insight into the ejector's complex flow field.Through analyzing effects of operation paramete r s on the entrainment ratio,the mechanism of the flow in the ejector is developed .COP of the ejector is enhanced about 4% by optimizing its structure.