Changeset 129


Ignore:
Timestamp:
Jan 23, 2007, 7:00:09 PM (15 years ago)
Author:
gerson bicca
Message:

updated

Location:
trunk/eml/heat_exchangers
Files:
2 edited

Legend:

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

    r110 r129  
    454454
    455455"Overall Heat Transfer Coefficient Clean"
    456         Details.Uc*(Resistances.Rtube+Resistances.Rwall+Resistances.Rshell)=1;
     456        (1/Details.Ud)=(1/Details.Uc)+Resistances.Rfo+Resistances.Rfi*(DoInner/DiInner);
    457457
    458458"Overall Heat Transfer Coefficient Dirty"
    459         Details.Ud*(Resistances.Rfi*(DoInner/DiInner) + Resistances.Rfo + Resistances.Rtube + Resistances.Rwall + Resistances.Rshell)=1;
     459        Details.Ud=1/(DoInner/(Inner.HeatTransfer.hcoeff*DiInner)+Resistances.Rfo+Resistances.Rfi*(DoInner/DiInner)+(DoInner*ln(DoInner/DiInner)/(2*Kwall))+(1/(Outer.HeatTransfer.hcoeff)));
     460       
    460461       
    461462end
  • trunk/eml/heat_exchangers/HEX_Engine.mso

    r110 r129  
    252252#===================================================================== 
    253253VARIABLES
    254 A               as area                         (Brief="Exchange Surface Area");
     254A               as area                         (Brief="Exchange Surface Area",Lower=1e-6);
    255255Q               as power                        (Brief="Heat Transfer", Default=7000, Lower=1e-6, Upper=1e10);
    256256Uc              as heat_trans_coeff (Brief="Overall Heat Transfer Coefficient Clean",Default=1,Lower=1e-6,Upper=1e10);
Note: See TracChangeset for help on using the changeset viewer.