Hello Dymola users/developers;
Can anyone give any insights on how to solve the errors like this?
my model runs but gives a LOT of lines like this:
Model error - division by zero: (1.0) / (4182*(Student_Centre.senTem.T-Student_Centre.ReturnT.T)) = (1) / (0)
Non-linear solver will attempt to handle this problem.
my consumer looks like this:
If I use a lumped version where I consider all the pipes to be one long pipe like this:
However if I break down my model like this:
The model crashes and gives this long error:
Log-file of program ./dymosim (generated: Sun Jan 28 17:34:17 2018)
dymosim started ... "dsin.txt" loading (dymosim input file) main_pump.nominalValuesDefineDefaultPressureCurve The following was detected at time: 0 * Warning: You are using a flow or pressure controlled mover with the default pressure curve. This leads to approximate calculations of the electrical power consumption. Add the correct pressure curve in the record per to obtain an accurate computation. Setting nominalValuesDefineDefaultPressureCurve=true will suppress this warning.
Solving nonlinear system of equations number = 2 Tag: initialization.nonlinear[1] iteratively at Time = 0 Science_Complex.val.dp = 1013.25 parallelPipes.pipSupply.res.dp = 0 parallelPipes1.pipReturn.res.dp = 0 Student_Centre.val.dp = 1013.25 parallelPipes5.pipSupply.res.dp = 0 Law_School.val.dp = 1013.25 parallelPipes9.pipSupply.res.dp = 0 Biomedical.val.dp = 1013.25 parallelPipes4.pipReturn.res.dp = 0 parallelPipes8.pipReturn.res.dp = 0 parallelPipes7.pipReturn.res.dp = 0 Tierney.val.dp = 1013.25 Library.val.dp = 1013.25 Newman.val.dp = 1013.25 Restaurant.val.dp = 1013.25 parallelPipes6.pipReturn.res.dp = 0 parallelPipes3.pipReturn.res.dp = 0 Sports_Centre.val.dp = 85000 Residual: { 76986.8, 209.115, 0, -0, -0.398533, -0.95648, -1.81192, -1.09573, -0, -7.97067E-006, 0, 0, 0, 0, 0, 0, 231.029, 0 }
Residual scale row 1, J_sum=101013 Residual scale row 2, J_sum=1905.34 Residual scale row 3, J_sum=151253 Residual scale row 4, J_sum=174626 Residual scale row 5, J_sum=3223.98 Residual scale row 6, J_sum=360720 Residual scale row 7, J_sum=189318 Residual scale row 8, J_sum=3223.98 Residual scale row 9, J_sum=3223.98 Residual scale row 10, J_sum=3223.98 Residual scale row 11, J_sum=1611.99 Residual scale row 12, J_sum=174626 Residual scale row 13, J_sum=313380 Residual scale row 14, J_sum=227820 Residual scale row 15, J_sum=313380 Residual scale row 16, J_sum=189318 Residual scale row 17, J_sum=2007.7 Residual scale row 18, J_sum=263755 Condition estimate of Jacobian matrix 217318.6868603976 Science_Complex.val.dp = 77982.8 parallelPipes.pipSupply.res.dp = -126.431 parallelPipes1.pipReturn.res.dp = 5.02427 Student_Centre.val.dp = 78000 parallelPipes5.pipSupply.res.dp = 4.4954 Law_School.val.dp = 77977.7 parallelPipes9.pipSupply.res.dp = 3.65229E-014 Biomedical.val.dp = 77990 parallelPipes4.pipReturn.res.dp = 3.58925 parallelPipes8.pipReturn.res.dp = 7.1697E-006 parallelPipes7.pipReturn.res.dp = 0.849676 Tierney.val.dp = 77979.4 Library.val.dp = 77980.8 Newman.val.dp = 77977.7 Restaurant.val.dp = 77977.7 parallelPipes6.pipReturn.res.dp = 0.713728 parallelPipes3.pipReturn.res.dp = 0.97332 Sports_Centre.val.dp = -2883.01 Residual: { 80883, -50.8888, -1.17235E-010, -6.89893E-012, -0.0515689, -0.276579, -0.418128, 0.305165, -1.15574E-013, 3.98533E-006, 2.67611E-014, -1.02307E-011, 1.81332E-011, 2.95826E-011, 1.69575E-012, 8.94884E-012, -228.416, 1.35829E-011 }
Scaled residual 0.8091835510724474 Old Residual 0.778533719823167 Predicted relative decrease 1 Actual relative decrease -0.03936866248547606 The following error was detected at time: 0
Model error - division by zero: (1.0) / (4182*(Student_Centre.senTem.T-Student_Centre.ReturnT.T)) = (1) / (0)
Non-linear solver will attempt to handle this problem.
