| Gas-liquid separator can separate droplets in two-phase flow,which was widely used in refrigeration system to protect it safe operation.In this paper,the performance of a horizontal gas-liquid separator was studied based on numerical simulation technology in aspect of separation efficiency,pressure drop and liquid surface fluctuation.Due to the simulation results,an optimize structure of the separator was proposed and verified.The VOF model and the discrete phase model were used to simulate the fluctuation of the gas liquid interface,and to calculate the separation efficiency of the separator respectively.According to the results,the following conclusions were drawn:(1)Refrigerant liquid accumulated at the bottom of the separator,and the shapewas affected by unstable flow in the liquid phase of the gas stream clearly,and partial liquid followed the gas flow out of the separator into the suction line of the refrigerant compressor;(2)The separation efficiency of the separator can be increased by increasing the inlet velocity of refrigeration flow,but the flow resistance increasessimultaneously.Hence,an excessive inlet velocity is not conducive to gas-liquid separation;(3)The separator has better separation efficiency for large particle size droplets,especially for theparticle size above 10?m,the separation efficiency is nearly100%;(4)A semicircle baffle was installedinside the separator at four different positions respectively,the performance including separation efficiency,pressure drop,and the comparison of the liquid at the outlet,were simulated and analyzed based on numerical simulation.According to the results,the semicircle baffle located at the end of the separator presented better performance compared to the original separator:89.1% separation efficiency,1.8% higher;while only 216 Pa flow resistance increasing which was negligibleto the whole flow resistance 10,764 Pa;and the average outlet liquid in the two-phase flow was drooped to 2.585%. |
PDF Full Text Request