Changeset 223


Ignore:
Timestamp:
Mar 19, 2007, 7:49:44 PM (16 years ago)
Author:
gerson bicca
Message:

added a rigorous model for shell and tubes heat exchanger

Location:
branches/newlanguage/eml/heat_exchangers
Files:
1 added
1 edited

Legend:

Unmodified
Added
Removed
  • branches/newlanguage/eml/heat_exchangers/HEX_Engine.mso

    r197 r223  
    3333Mw              as molweight            (Brief="Average Mol Weight",Default=75, Lower=1, Upper=1e8);
    3434T                       as temperature          (Brief="Average  Temperature",Lower=50);
    35 P                       as pressure                     (Brief="Average  Pressure",Default=1, Lower=1e-10, Upper=30);
     35P                       as pressure                     (Brief="Average  Pressure",Default=1, Lower=1e-10, Upper=30,DisplayUnit='kPa');
    3636rho             as dens_mass            (Brief="Stream Density" ,Default=1000, Lower=1e-3, Upper=5e5);
    3737Mu              as viscosity            (Brief="Stream Viscosity",Lower=0.0001);
     
    9999       
    100100VARIABLES
    101 PdTube                  as press_delta  (Brief="Tube Pressure Drop",Default=0.01, Lower=1e-10);
    102 Pdtotal                         as press_delta  (Brief="Total Pressure Drop",Default=0.01, Lower=1e-10);
    103 Pdnozzle_in     as press_delta  (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0);
    104 Pdnozzle_out    as press_delta  (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0);
     101PdTube                  as press_delta  (Brief="Tube Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
     102Pdtotal                         as press_delta  (Brief="Total Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
     103Pdnozzle_in     as press_delta  (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     104Pdnozzle_out    as press_delta  (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    105105Vnozzle_in      as velocity             (Brief="Inlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
    106106Vnozzle_out     as velocity             (Brief="Outlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
     107fi                              as fricfactor   (Brief="Friction Factor", Default=0.05, Lower=1e-10, Upper=2000);
    107108
    108109EQUATIONS
     
    141142       
    142143VARIABLES
    143 PdCross                         as press_delta          (Brief="Cross Flow Pressure Drop",Default=0.01, Lower=0);
    144 PdEndZones              as press_delta          (Brief="End Zones Pressure Drop",Default=0.01, Lower=0);
    145 Pdwindow                        as press_delta          (Brief="Window Pressure Drop",Default=0.01, Lower=1e-10);
    146 Pdtotal                                 as press_delta          (Brief="Total Pressure Drop",Default=0.01, Lower=0);
    147 Pdnozzle_in             as press_delta          (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0);
    148 Pdnozzle_out            as press_delta          (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0);
     144Pideal                      as press_delta              (Brief="Ideal Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     145PdCross                         as press_delta          (Brief="Cross Flow Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     146PdEndZones              as press_delta          (Brief="End Zones Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     147Pdwindow                        as press_delta          (Brief="Window Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
     148Pdtotal                                 as press_delta          (Brief="Total Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     149Pdnozzle_in             as press_delta          (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     150Pdnozzle_out            as press_delta          (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
     151fi                                      as fricfactor           (Brief="Friction Factor", Default=0.05, Lower=1e-10, Upper=2000);
    149152Vnozzle_in              as velocity                     (Brief="Inlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
    150153Vnozzle_out             as velocity                     (Brief="Outlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
     
    316319VARIABLES
    317320
    318 Pdrop   as press_delta  (Brief="Pressure Drop",Default=0.01, Lower=0);
     321Pdrop   as press_delta  (Brief="Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    319322FPdrop  as Real                 (Brief="Pressure Drop : Fraction of Inlet",Lower=0,Upper=0.8);
    320323
     
    358361VARIABLES
    359362
    360 Pdrop   as press_delta  (Brief="Pressure Drop",Default=0.01, Lower=1e-10);
     363Pdrop   as press_delta  (Brief="Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
    361364fi      as fricfactor   (Brief="Friction Factor", Default=0.05, Lower=1e-10, Upper=2000);
    362365Re      as positive             (Brief="Reynolds Number",Default=100,Lower=1);
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