Ignore:
Timestamp:
Apr 4, 2008, 12:57:01 PM (15 years ago)
Author:
gerson bicca
Message:

more updates in heat exchangers

File:
1 edited

Legend:

Unmodified
Added
Removed
  • trunk/eml/heat_exchangers/HEX_Engine.mso

    r490 r492  
    7676VARIABLES
    7777
    78 Inlet                   as Properties_In_Out            (Brief="Properties at Inlet Stream", Symbol = "^{in}");
    79 Average         as Properties_Average   (Brief="Properties at Average Temperature", Symbol = "^{avg}");
    80 Outlet          as Properties_In_Out            (Brief="Properties at Outlet Stream", Symbol = "^{out}");
    81 Wall                    as Properties_Wall                      (Brief="Properties at Wall Temperature", Symbol = "^{wall}");
     78Inlet           as Properties_In_Out    (Brief="Properties at Inlet Stream", Symbol = "_{in}");
     79Average         as Properties_Average   (Brief="Properties at Average Temperature", Symbol = "_{avg}");
     80Outlet          as Properties_In_Out    (Brief="Properties at Outlet Stream", Symbol = "_{out}");
     81Wall                    as Properties_Wall              (Brief="Properties at Wall Temperature", Symbol = "_{wall}");
    8282
    8383end
     
    8787ATTRIBUTES
    8888        Pallete = false;
    89         Brief = "to be documented";
    90         Info =
    91         "to be documented";
    92        
    93 VARIABLES
    94 PdTube                  as press_delta  (Brief="Tube Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
    95 Pdtotal                         as press_delta  (Brief="Total Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
    96 Pdnozzle_in     as press_delta  (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    97 Pdnozzle_out    as press_delta  (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    98 Vnozzle_in      as velocity             (Brief="Inlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
    99 Vnozzle_out     as velocity             (Brief="Outlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
    100 fi                              as fricfactor   (Brief="Friction Factor", Default=0.05, Lower=1e-10, Upper=2000);
     89        Brief = "Pressure drop and velocities in the tube side section of a shell and tube heat exchanger.";
     90       
     91VARIABLES
     92TubeFriction    as press_delta  (Brief="Tube Pressure Drop due to friction", Symbol = "\Delta P_{tube}", Default=0.01, Lower=1E-10,DisplayUnit='kPa');
     93InletNozzle     as press_delta  (Brief="Inlet Nozzle Pressure Drop", Symbol = "\Delta P_{Nozzle\_In}", Default=0.01, Lower=0,DisplayUnit='kPa');
     94OutletNozzle    as press_delta  (Brief="Outlet Nozzle Pressure Drop", Symbol = "\Delta P_{Nozzle\_Out}", Default=0.01, Lower=0,DisplayUnit='kPa');
     95Total                           as press_delta  (Brief="Total Pressure Drop", Symbol = "\Delta P_{total}", Default=0.01, Lower=1E-10,DisplayUnit='kPa');
     96Vnozzle_in              as velocity             (Brief="Inlet Nozzle Velocity", Symbol = "V_{Nozzle\_In}", Default=1, Upper=1e5, Lower=0);
     97Vnozzle_out     as velocity             (Brief="Outlet Nozzle Velocity", Symbol = "V_{Nozzle\_Out}", Default=1, Upper=1E5, Lower=0);
     98FricFactor              as fricfactor           (Brief="Friction Factor", Symbol = "f_i", Default=0.05, Lower=1e-10, Upper=2000);
    10199
    102100EQUATIONS
    103101"Total Pressure Drop"
    104         Pdtotal = PdTube + Pdnozzle_in + Pdnozzle_out;
     102        Total = TubeFriction + InletNozzle + OutletNozzle;
    105103
    106104end
     
    129127ATTRIBUTES
    130128        Pallete = false;
    131         Brief = "to be documented";
    132         Info =
    133         "to be documented";
    134        
    135 VARIABLES
    136 Pideal                      as press_delta              (Brief="Ideal Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    137 PdCross                         as press_delta          (Brief="Cross Flow Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    138 PdEndZones              as press_delta          (Brief="End Zones Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    139 Pdwindow                        as press_delta          (Brief="Window Pressure Drop",Default=0.01, Lower=1e-10,DisplayUnit='kPa');
    140 Pdtotal                                 as press_delta          (Brief="Total Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    141 Pdnozzle_in             as press_delta          (Brief="Inlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    142 Pdnozzle_out            as press_delta          (Brief="Outlet Nozzle Pressure Drop",Default=0.01, Lower=0,DisplayUnit='kPa');
    143 fi                                      as fricfactor           (Brief="Friction Factor", Default=0.05, Lower=1e-10, Upper=2000);
    144 Vnozzle_in              as velocity                     (Brief="Inlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
    145 Vnozzle_out             as velocity                     (Brief="Outlet Nozzle Velocity",Default=1, Upper=1e5, Lower=0);
     129        Brief = "Pressure drop and velocities in the shell side section of a shell and tube heat exchanger.";
     130       
     131VARIABLES
     132Ideal                           as press_delta          (Brief="Ideal Pressure Drop", Symbol = "\Delta P_{ideal}", Default=0.01, Lower=0,DisplayUnit='kPa');
     133CrossFlow                       as press_delta          (Brief="Cross Flow Pressure Drop", Symbol = "\Delta P_{CrossFlow}", Default=0.01, Lower=0,DisplayUnit='kPa');
     134EndZones                        as press_delta          (Brief="End Zones Pressure Drop", Symbol = "\Delta P_{EndZones}", Default=0.01, Lower=0,DisplayUnit='kPa');
     135Window                                  as press_delta          (Brief="Window Pressure Drop", Symbol = "\Delta P_{Window}", Default=0.01, Lower=1e-10,DisplayUnit='kPa');
     136InletNozzle             as press_delta          (Brief="Inlet Nozzle Pressure Drop", Symbol = "\Delta P_{Nozzle\_In}", Default=0.01, Lower=0,DisplayUnit='kPa');
     137OutletNozzle            as press_delta          (Brief="Outlet Nozzle Pressure Drop", Symbol = "\Delta P_{Nozzle\_Out}", Default=0.01, Lower=0,DisplayUnit='kPa');
     138Total                                   as press_delta          (Brief="Total Pressure Drop", Symbol = "\Delta P_{Total}", Default=0.01, Lower=0,DisplayUnit='kPa');
     139FricFactor              as fricfactor                   (Brief="Friction Factor",  Symbol = "f_i", Default=0.05, Lower=1e-10, Upper=2000);
     140Vnozzle_in                      as velocity                     (Brief="Inlet Nozzle Velocity", Symbol = "V_{Nozzle\_In}", Default=1, Upper=1e5, Lower=0);
     141Vnozzle_out             as velocity                     (Brief="Outlet Nozzle Velocity", Symbol = "V_{Nozzle\_Out}", Default=1, Upper=1e5, Lower=0);
    146142RVsquare_out            as positive                     (Brief = "Outlet Nozzle rho-V^2", Default=1, Upper=1e6, Unit = 'kg/s^2/m');
    147143RVsquare_in             as positive                     (Brief = "Inlet Nozzle rho-V^2", Default=1, Upper=1e6, Unit = 'kg/s^2/m');
     
    149145EQUATIONS
    150146"Shell Side Total Pressure Drop"
    151         Pdtotal = PdCross + PdEndZones + Pdnozzle_in + Pdnozzle_out + Pdwindow;
     147        Total = CrossFlow+ EndZones + InletNozzle + OutletNozzle + Window;
    152148
    153149end
     
    303299VARIABLES
    304300
    305 PressureDrop    as Tube_Pdrop                           (Brief="Tube Side Pressure Drop");
    306 HeatTransfer    as Tube_Heat_Transfer   (Brief="Tube Side Heat Transfer");
    307 Properties              as Physical_Properties          (Brief="Tube Side Properties");
     301PressureDrop    as Tube_Pdrop                           (Brief="Tube Side Pressure Drop", Symbol = " ");
     302HeatTransfer    as Tube_Heat_Transfer   (Brief="Tube Side Heat Transfer", Symbol = " ");
     303Properties              as Physical_Properties          (Brief="Tube Side Properties", Symbol = " ");
    308304
    309305end
     
    324320VARIABLES
    325321
    326 PressureDrop    as Shell_Pdrop                                  (Brief="Shell Side Pressure Drop");
    327 HeatTransfer    as Shell_Heat_Transfer          (Brief= "Shell Side Heat Transfer");
    328 Properties              as Physical_Properties          (Brief="ShellSide Properties");
     322PressureDrop    as Shell_Pdrop                                  (Brief="Shell Side Pressure Drop", Symbol = " ");
     323HeatTransfer    as Shell_Heat_Transfer          (Brief= "Shell Side Heat Transfer", Symbol = " ");
     324Properties              as Physical_Properties          (Brief="ShellSide Properties", Symbol = " ");
    329325
    330326end
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