The Simulation And Optimum Design Of Rolling Rotor Compressor With Propane

Propane (HC 290),as a kind of air conditioning refrigerant ,is a good choice in substitutes of HCFC 22.Propane (HC 290) has a smaller Filling volume, higher energy efficiency and better economy than HCFC 22. Propane, as an excellent refrigerant, is very suitable for small-scale and air-conditioning closed rolling rotor compressor. In the use of the new refrigerant of HC 290, it's needed to optimize the system design according to the nature of HC 290.In the performance of the compressor side is to improve the volumetric efficiency of the rolling rotor compressor by reducing the volume loss, reducing the pressure loss, reducing the temperature loss and reducing the leakage loss. In this paper, the volume loss and the leakage loss is focused on, specially the leakage loss . According to physical properties of HC 290, a compressor is redesigned, and a suitable size of clearance leakage and a enough viscosity of lubricating oil is decided.Leakage losses have a big effect on the volumetric efficiency of compressors .To the same compressor, different gap sizes and different lubricants will lead to differs leakage losses. Cylinder leak on the loss of space research is the focus of this article. In the use of FLUENT, gas escape of HC 290 in the radial clearance of the rotor and the surface clearance of both sides of the skateboard is simulated. In the radial clearance and the surface clearance, refrigerant vapor leakages use a rotating wall model and static model, when considering the space of two-phase flow of oil and gas when it is used in FLUENT jet VOF fragmentation model.The simulation results of the comparative analysis, selected No. 46 mineral oil as a rolling piston compressor HC290 systems and lubricants suitable radial clearance control 25 below surface space on both sides of the control slide 35 below, you can make gas leakage control in compressor mass flow below 5%. The use of higher viscosity lubricants and allows both sides of the radial clearance and surface space skateboards smaller size also allows further leakage and then become smaller.