Shortcut modeling of natural gas supersonic separation

Abstract

Liquid phase Liquid phase fraction 6.85E-04 5.44E-03 Carbon dioxide 1.15E-03 2.81E-03 Nitrogen 8.36E-05 4.76E-05 Methane 0.131573 0.117488 Ethane 2.44E-02 5.57E-02 Propane 3.19E-02 0.131492 iso-butane 2.61E-02 0.126888 n-butane 3.28E-02 0.151564 iso-pentane 4.83E-02 0.131666 n-pentane 3.45E-02 7.28E-02 n-hexane 0.117852 8.18E-02 n-heptane 0.328206 9.09E-02 n-octane 0.209931 3.50E-02 n-nonane 1.32E-02 1.82E-03 c write(iout,5225)(icp,(rmolefr(icp,jph),jph=1,np),icp=1,nc) c End search for sidestreams and begin search for shock wave position c 450 continue c Save position of the last side stream c c ratiolastss=ratiotothroat c write(iout,*) 'end of part 3 kountexpand',kountexpand c c c End search for the sidestream position(s) c ========================================= c c Begin search for the shock wave position c ======================================== c c go to 700 c if (1.d00/arearatio.lt.100.) goto 700 c write(iout,*) c write(iout,*) c write(iout,*) c write(iout,*) 'beginning of part 4 kountexpand',kountexpand c c part 4: find temperature and pressure after jump c ialgo=2 c c iterpath=0 c 470 continue c iterpath=iterpath+1 if (.not.aftershock) then kountexpand=kountexpand+1 endif c c initial guess for the speed after the shock wave c c write(iout,*) 'backpressure,poutspec',backpressure,poutspec c if (kountexpand.le.2) then pshock=poutspec*(rmach**2) tshock=rmach*t fspeedshock=fspeed-vflash/(fspeed*rmmkgmol)* & (pshock-poutspec)/facp c else c pshock=pshockold*(rmach/rmachold)**2 c tshock=tshockold*(rmach/rmachold) c fspeedshock=fspeedshockold*arearatioold/arearatio c endif c write(iout,*) 'set A',vflash,fspeed,rmmkgmol

Comparative Study of the Combined Supersonic Separator and Vortex Tube Performance for Hydrocarbon Gas Drying

“…Alnoush and Castier 20 proposed an approach for the optimization of the natural gas supersonic separation modeling process. They present an abbreviated one‐dimensional numerical model that allows the simulation of supersonic separators.…”

Non-equilibrium condensation of water vapour in supersonic flows with shock waves

“…On the one hand, the key working principle of the supersonic separation is nonequilibrium condensation of water vapour in supersonic flows. On the other hand, the supersonic separation also benefits from the shock wave [3] when supersonic flows are transformed to subsonic flows, which recovers the pressure to maximum improve the energy efficiency [4].…”

Prediction of dehydration performance of supersonic separator based on a multi-fluid model with heterogeneous condensation

“…Liu [27] established a three-dimensional single-phase numerical model considering the compressible and strong swirling effect to study the flow field and to optimize separation performance. Alnoush and Castier [28] proposed a shortcut one-dimensional single-phase numerical modeling for the conceptual preliminary design of supersonic separator.…”