高能同步辐射光源(HEPS)氦低温传输系统模拟与计算

Simulation and calculation of helium cryogenic transmission system of high energy photon source(HEPS)

使用EcosimPro商业软件和关联式编程两种方法,对HEPS氦低温传输系统进行了模拟和计算,研究了管道内径和管道粗糙度对管道压降的影响。结果表明流动压降随着管道内径的增大而减小,但降低的幅度越来越小,当管道直径从30.8 mm提高至56.8 mm,压降仅降低了约510 Pa;流动压降随粗糙度的增加而增加,但管径越大压降增加越小,当管径为30.8 mm时,选用电抛光管压降下降了954 Pa;管道的漏热量和降温复温时间随管径的增大而提升。通过计算分析最终选择主干来流管道公称直径为DN25,内径为30.8 mm的普通金属管,分支来流管道公称直径为DN10,内径为14.6 mm的普通金属管,主干回流管道公称直径为DN50,内径为56.8 mm的普通金属管,分支回气管道公称直径为DN20,内径为23.8 mm的普通金属管,满足工程需求。

EcosimPro commercial software and correlation programming were used to simulate and calculate the HEPS helium cryogenic transmission system,and the effects of the inner diameter and roughness of the pipe on the pressure drop were studied.The results showed that the pressure drop of pipe decreased with the increase of the inner diameter,but the decrease range was smaller and smaller.When the pipe diameter increased from 30.8 mm to 56.8 mm,the pressure drop only decreased by 510 Pa.The pipe pressure drop increased with the increase of the roughness,but the larger the pipe diameter,the smaller the pressure drop.When the pipe diameter was 30.8 mm,the pressure drop of the electropolished pipe decreased by 954Pa.The heat leakage and the time in the cool-down and rewarming process increase with the increase of pipe diameter.Through calculation and analysis,the common metal pipe with the nominal diameter of DN25 and inner diameter of 30.8 mm was finally selected,the common metal pipe with the nominal diameter of DN10 and inner diameter of 14.6 mm was selected for the branch flow pipe,the common metal pipe with the nominal diameter of DN50 and inner diameter of 56.8 mm was selected for the main return gas pipe,the pipe with the nominal diameter of DN20 and inner diameter of 23.8 mm was selected for the branch return gas pipe,which can meet the demands.