Maximization of energy recovery inside supersonic separator in the presence of condensation and normal shock wave

Shooshtari, Seyed Heydar Rajaee; Shahsavand, Akbar

doi:10.1016/j.energy.2016.12.060

Cited by 44 publications

(7 citation statements)

References 20 publications

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“…Models in the numerical study Shooshtari & Shahsavand [13] Condensing flow model, nozzle flow, no shock waves Ma et al [14,15] Condensing flow model, nozzle flow, no shock waves Bian et al [16,17] Condensing flow model, nozzle flow, no shock waves Sun et al [18,19] Condensing flow model, nozzle flow, no shock waves Shooshtari & Shahsavand [20,21] Homogeneous nucleation and mass transfer rate calculations for liquid droplet growth Niknam et al [22] Evaporation-condensation phase change model in ANSYS FLUENT This study aims to assess the performance of the supersonic separation considering the phase change process and shock waves. A condensing flow model is developed for predicting the complicated fluid flow, heat and mass transfer of water vapour in the supersonic separator.…”

Section: Referencesmentioning

confidence: 99%

“…Shooshtari & Shahsavand [20,21] studied the phase change process in a supersonic separator using a mass transfer rate method for calculating the droplet growth with the one-dimensional model. Niknam et al [22] investigated the phase change process of water vapour in a supersonic separator based on the evaporation-condensation model in ANSYS FLUENT.…”

Section: Introductionmentioning

confidence: 99%

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Optimisation study of a supersonic separator considering nonequilibrium condensation behaviour

Wen

Ding

Yang

2020

Energy Conversion and Management

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The supersonic separation offers an opportunity for natural gas processing.The problem is that the phase change of water vapour in the supersonic flow is not fully understood in the presence of shock waves in a supersonic separator. This study aims to evaluate the performance of the supersonic separation with the phase change process and shock waves. The condensing flow model is developed to accurately predict the energy conversion within the supersonic separator. The computational results show that the single-phase flow model over-estimates the vapour expansions by 12.43% higher Mach number than the condensing flow model. The liquid fraction of 8.2% is predicted by the condensing flow model during the phase change process in supersonic separators.The supersonic separator is optimised via combining the diverging part of the supersonic nozzle and constant cyclonic separation tube as a long diverging part of the newly designed nozzle. The optimised supersonic separator reduces the energy loss by eliminating the oblique and expansion waves in the newly designed nozzle, which 2 improves the energy efficiency for natural gas processing.

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Section: Referencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimisation study of a supersonic separator considering nonequilibrium condensation behaviour

Wen

Ding

Yang

2020

Energy Conversion and Management

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“…Shooshtari and Shahsavand [29] simulated supersonic separation using various structures and diffuser angles to study the effect of varying pressure recovery coefficient.…”

Section: Thermodynamic and Numerical Simulation Studiesmentioning

confidence: 99%

Shortcut modeling of natural gas supersonic separation

Alnoush

Castier

2019

Journal of Natural Gas Science and Engineering

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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

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“…In order to reduce operating costs and improve separation efficiency, it is urgent to develop new separation technology. Supersonic separation technology employs the theory of gas-liquid two-phase flow mechanics, thermodynamics and supersonic gas dynamics to achieve the purpose of dehumidification by consuming certain pressure energy [4][5][6][7][8]. Specifically, the LAVAL nozzle is first used to make high-pressure natural gas expand to a supersonic state.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics of Supersonic Separator for Natural Gas Processing

Wang¹,

Li²,

Zheng

et al. 2022

J. Phys.: Conf. Ser.

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Natural gas is a key energy source to achieve the carbon peaking and carbon neutrality goals in China. Dehydration and de-hydrocarbon process is crucial for pipeline transportation of natural gas since water and hydrocarbons in the natural gas would condense to cause corrosion and freeze-blockage in the pipeline. The supersonic separator is innovative low-temperature separation equipment characterized by a simpler equipment structure and higher refrigeration efficiency than the traditional device. In this paper, the numerical analysis is employed to predict the performance of the supersonic separator. The results show that this separator can reach an advanced level compared with others. The separator cannot start-up as the inlet-outlet pressure ratio is lower than1.29, and the minimum pressure ratio needed for normal work is 1.39. Under normal operating conditions, total pressure loss is about 25.4%, the minimum temperature is about 213K, and the mean rotation speed is about 170m/s.

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Maximization of energy recovery inside supersonic separator in the presence of condensation and normal shock wave

Cited by 44 publications

References 20 publications

Optimisation study of a supersonic separator considering nonequilibrium condensation behaviour

Optimisation study of a supersonic separator considering nonequilibrium condensation behaviour

Shortcut modeling of natural gas supersonic separation

Aerodynamic Characteristics of Supersonic Separator for Natural Gas Processing

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