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RTD software for identification of spatially localised models and data standardisation

RTD software for identification of spatially localised models and data standardisation. R.Žitný, J.Thýn Czech Technical University in Prague. . History of RTD software development at CTU. Radiotracers group UVVVR since 1965. First generation of RTD (mainframe), 1973-1980

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RTD software for identification of spatially localised models and data standardisation

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  1. RTD software for identification of spatially localised models and data standardisation R.Žitný, J.Thýn Czech Technical University in Prague

  2. .History of RTD software development at CTU • Radiotracers group UVVVR since 1965. • First generation of RTD (mainframe), 1973-1980 • Second generation (HP Basic), 1978-1989 • Third generation (IBM PC), 1989-1999 • Fourth generation ?

  3. First generation of RTD • Portability (Fortran 4, file oriented I/O) • Transparency (easy modifications) • Simple (user friendly) definition of batch

  4. Example of batch(identification) • INPUT(1) • INPUT(2) • NORM2(1,2) • ECOEF2(1,2,3) • TPOINT(3) • STOP • data (ti,ci) for time curve 1 – inlet stream • data (ti,ci) for time curve 2 – outlet stream.

  5. Third generation of RTD • Interactive Fortran77, (Matrix Editor, PF) • Regularisation in time, Fouriere, Laguerre domain • Identification of mixed type parameters (integer/real) • Definition of models using MDF

  6. Black - Gray box analysis

  7. Model definition file (MDF) C______1 series & backmixing [P1] Backmixing ratio f=@1F8.2 [P2] Mean residence time Te=@2F8.2 [P3] Number of units @3F6.0 \\INIT real tm,f,aux integer i f=p(1) neq=p(3) tm=p(2)/neq c(1)=1/tm \\MODEL dc(1)=(x+f*c(2)-(1+f)*c(1))/tm i=1 while i<neq-1 do begin i=i+1 aux=(1+f)*c(i-1)+f*c(i+1)-(1+2*f)*c(i) dc(i)=aux/tm end dc(neq)=((1+f)*(c(neq-1)-c(neq)))/tm y=c(neq) \\PARAM

  8. Models defined by users • variable flow/volume, • axial dispersion • collimation characteristics, • heat transfer • multiple inlets/outlets, • heterogeneous system • batch systems

  9. RTD0 application • Steam velocity. Venturimeter calibration;(NZ) • Effective volume, holdup. Waste stabilization pond (Ph; Ml), Holding tanks (Alumina industry) (Au), Rotary kiln (Cz) • Parallel flows, bypass,channeling. Tank with settler - pilot plant (K), Ethylalcohol reactor (Cz), Precipitation tanks (Au), Holding tanks (Au) • Mixing characteristic, axial dispersion • Recirculation flowrate ratio • Separation effect,tracer balance. Cement industry -Cyclone (K)

  10. RTD1 application • Flow rate measurement. Steam velocity measur.(NZ), flowrate measurement (K), incinerator (NZ), temperature disturbances (extremely slow flowrate) (Cz) • RTD functions: E(t), F(t), 8(t). Fluidized catalytic cracking (Au, Fi), Settling tank; waste water treatment (Cz), Heat exchanger (In,K), Evaporator (In), Aniline reactor (In), Indirect rotary dryer (In), Mercury removal unit (Th), Electron beam gas chamber (K), Direct ohmic heating (Cz) • Smoothing, disturbance attenuation. Waste water treatment (Cz) • Transfer functions, Frequency characteristics, Waste water treatment (Cz), furnace for glass (Cz)

  11. RTD2 application • Pilot plants. Mixed Tank (K); Extractor (Tl), Hygienization irradiator for waste water (batch system) • Waste water treatment. Tank of activated sludge (TAS), air tubes (Ge), aeration turbines (Cz) Gold system of activation (Cz), Sedimentation tanks (Cz), Equalization unit (Cz) Facultative oxidation Pond (Ph,Ml) • Heat exchangers. Tubular heat exchanger (In),(K) • Evaporation, dehydratation. Semi-Kestner (sugar industry) (In), Rotary dryer (In), Dehydratation rotational furnace (pigment production) (Cz) • Reactors. Production of aldehydes (Cz), Production of aniline (In), FCC crackinkg (1)Au, (2) Fi), • Alumina production (Au). Precipitators; digestors; agglomeration, holding tanks • Electron beams gas chamber (K). Chamber with baffles, chamber without baffles • Disintegration effect Hammer mill (Cz), drum furnace (Cz)

  12. Process modelling, LPM and CFD ?tracer EXPeriments • Lumped Parameter (LPM) • Computer fluid dynamics (CFD) • Combined Models (CM)

  13. Why spatially localised models? • Improved description and design of processes • Improved diagnostics • Residence time and temperature time T(t) • Thermal or irradiation treatment

  14. Distance=? Constant concentration in the view field Distance=? Non-uniform concentration in the view field Spatially localised LPM • Series • Parallel

  15. LPM & collimation algorithm FCC -Fluidised Cracking Core - Anulus model (ccore, cwall =?)

  16. EXP & collimation algorithm Direct Ohmic Heating Collimated Detector

  17. CFD & collimation algorithm Direct Ohmic Heating FEM-COSMOS/M Collimated Detector CV-FLUENT (600000 nodes, 600 MB results)

  18. CFD/EXP collimation algorithm

  19. Focused collimation algorithm

  20. 4th generation RTD software • Project file • Script • Programs

  21. ConceptualschemeCORE • Project file • Script • Programs

  22. FRONTEND GTK libraryfor Windows and Unix • Windows • Visual studio? • Linux

  23. UNIX orWindows ? B.G.makes stars from secretaries and idiots from experts

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