现代制冷空调技术

1、Simulation of leakage characteristics of refrigerants in rolling piston type rotary compressor 朱奕豪朱奕豪 D2014773002015.Mathematical modeling1.Types of leakage2.Geometryand thermodynamic analyses3.Thermodynamicproperties of refrigerant-oil mixtures4.Models for thermodynamic properties evaluation of two

2、-phase fluid5. Governing equationsLeakage losses through radial clearance between wall of rolling piston and wall of cylinder. Leakage losses through clearances between the faces of the rolling pistonand head walls of the cylinder. Leakage losses through clearances between the faces of the sliding v

3、ane and head walls of the cylinder.Leakage losses through clearances between the sides of the sliding vane and side walls of the chutes inside the cylinder.1.Types of leakage2.Geometry and thermodynamic analyses2.Geometry and thermodynamic analysesWhere h denotes the length of the sliding vane invad

4、ing into the cylinder. 3.Thermodynamic properties of refrigerant-oil mixtures4.Models for thermodynamic properties evaluation of two-phase fluid5. Governing equations5.1Leakage flow rate caused by pressure difference the leakage flow rate of the two-phase fluid in the radial clearance is given by:Si

5、milarly, leakage flow rate of the two-phase fluid through the clearance between the faces of the sliding vane and the head walls of the cylinder can be expressed by:5.2 Leakage flow rate caused by wall velocity the mass flow rate of the leakage caused by wall velocity per unit length in the width direction of the leakage channel is expressed by: The mass flo