MINLPLib
A Library of Mixed-Integer and Continuous Nonlinear Programming Instances
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Removed Instance pump
| Formatsⓘ | ams gms mod nl osil pip py |
| Primal Bounds (infeas ≤ 1e-08)ⓘ | |
| Other points (infeas > 1e-08)ⓘ | |
| Dual Boundsⓘ | |
| Referencesⓘ | Westerlund, Tapio, Petterson, Frank, and Grossmann, I E, Optimization of Pump Configurations as a MINLP Problem, Computers and Chemical Engineering, 18:9, 1994, 845-858. |
| Sourceⓘ | GAMS Model Library model pump |
| Applicationⓘ | Pump configuration problem |
| Added to libraryⓘ | 01 May 2001 |
| Removed from libraryⓘ | 04 Mar 2014 |
| Removed becauseⓘ | Duplicate of ex1252a |
| Problem typeⓘ | MINLP |
| #Variablesⓘ | 24 |
| #Binary Variablesⓘ | 3 |
| #Integer Variablesⓘ | 6 |
| #Nonlinear Variablesⓘ | 21 |
| #Nonlinear Binary Variablesⓘ | 3 |
| #Nonlinear Integer Variablesⓘ | 6 |
| Objective Senseⓘ | min |
| Objective typeⓘ | polynomial |
| Objective curvatureⓘ | indefinite |
| #Nonzeros in Objectiveⓘ | 12 |
| #Nonlinear Nonzeros in Objectiveⓘ | 12 |
| #Constraintsⓘ | 34 |
| #Linear Constraintsⓘ | 22 |
| #Quadratic Constraintsⓘ | 9 |
| #Polynomial Constraintsⓘ | 3 |
| #Signomial Constraintsⓘ | 0 |
| #General Nonlinear Constraintsⓘ | 0 |
| Operands in Gen. Nonlin. Functionsⓘ | |
| Constraints curvatureⓘ | indefinite |
| #Nonzeros in Jacobianⓘ | 81 |
| #Nonlinear Nonzeros in Jacobianⓘ | 24 |
| #Nonzeros in (Upper-Left) Hessian of Lagrangianⓘ | 60 |
| #Nonzeros in Diagonal of Hessian of Lagrangianⓘ | 6 |
| #Blocks in Hessian of Lagrangianⓘ | 3 |
| Minimal blocksize in Hessian of Lagrangianⓘ | 7 |
| Maximal blocksize in Hessian of Lagrangianⓘ | 7 |
| Average blocksize in Hessian of Lagrangianⓘ | 7.0 |
| #Semicontinuitiesⓘ | 0 |
| #Nonlinear Semicontinuitiesⓘ | 0 |
| #SOS type 1ⓘ | 0 |
| #SOS type 2ⓘ | 0 |
| Minimal coefficientⓘ | 7.8644e-08 |
| Maximal coefficientⓘ | 6.3290e+03 |
| Infeasibility of initial pointⓘ | 72.4 |
$offlisting
* MINLP written by GAMS Convert at 04/17/01 16:40:33
*
* Equation counts
* Total E G L N X
* 35 14 0 21 0 0
*
* Variable counts
* x b i s1s s2s sc si
* Total cont binary integer sos1 sos2 scont sint
* 25 16 3 6 0 0 0 0
* FX 0 0 0 0 0 0 0 0
*
* Nonzero counts
* Total const NL DLL
* 94 58 36 0
*
* Solve m using MINLP minimizing objvar;
Variables x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,i16,i17,i18,i19
,i20,i21,b22,b23,b24,objvar;
Positive Variables x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15;
Binary Variables b22,b23,b24;
Integer Variables i16,i17,i18,i19,i20,i21;
Equations e1,e2,e3,e4,e5,e6,e7,e8,e9,e10,e11,e12,e13,e14,e15,e16,e17,e18,e19
,e20,e21,e22,e23,e24,e25,e26,e27,e28,e29,e30,e31,e32,e33,e34,e35;
e1.. - ((6329.03 + 1800*x1)*i16*i19*b22 + (2489.31 + 1800*x2)*i17*i20*b23 + (
3270.27 + 1800*x3)*i18*i21*b24) + objvar =E= 0;
e2.. - (19.9*POWER(0.000338983050847458*x4,3) + 0.161*sqr(0.000338983050847458
*x4)*x10 - 1.90169491525424e-7*x4*sqr(x10)) + x1 =E= 0;
e3.. - (1.21*POWER(0.000338983050847458*x5,3) + 0.0644*sqr(
0.000338983050847458*x5)*x11 - 1.91186440677966e-7*x5*sqr(x11)) + x2
=E= 0;
e4.. - (6.52*POWER(0.000338983050847458*x6,3) + 0.102*sqr(0.000338983050847458
*x6)*x12 - 7.86440677966102e-8*x6*sqr(x12)) + x3 =E= 0;
e5.. - (0.00023593220338983*x4*x10 + 629*sqr(0.000338983050847458*x4) - 0.0116
*sqr(x10)) + x7 =E= 0;
e6.. - (0.001*x5*x11 + 215*sqr(0.000338983050847458*x5) - 0.115*sqr(x11)) + x8
=E= 0;
e7.. - (0.000179661016949153*x6*x12 + 361*sqr(0.000338983050847458*x6) -
0.00946*sqr(x12)) + x9 =E= 0;
e8.. x13 + x14 + x15 =E= 1;
e9.. - 0.00285714285714286*x10*i16 + x13 =E= 0;
e10.. - 0.00285714285714286*x11*i17 + x14 =E= 0;
e11.. - 0.00285714285714286*x12*i18 + x15 =E= 0;
e12.. - 0.0025*x7*i19 + b22 =E= 0;
e13.. - 0.0025*x8*i20 + b23 =E= 0;
e14.. - 0.0025*x9*i21 + b24 =E= 0;
e15.. 0.000338983050847458*x4 - b22 =L= 0;
e16.. 0.000338983050847458*x5 - b23 =L= 0;
e17.. 0.000338983050847458*x6 - b24 =L= 0;
e18.. 0.0125*x1 - b22 =L= 0;
e19.. 0.04*x2 - b23 =L= 0;
e20.. 0.0222222222222222*x3 - b24 =L= 0;
e21.. 0.0025*x7 - b22 =L= 0;
e22.. 0.0025*x8 - b23 =L= 0;
e23.. 0.0025*x9 - b24 =L= 0;
e24.. 0.00285714285714286*x10 - b22 =L= 0;
e25.. 0.00285714285714286*x11 - b23 =L= 0;
e26.. 0.00285714285714286*x12 - b24 =L= 0;
e27.. x13 - b22 =L= 0;
e28.. x14 - b23 =L= 0;
e29.. x15 - b24 =L= 0;
e30.. i16 - 3*b22 =L= 0;
e31.. i17 - 3*b23 =L= 0;
e32.. i18 - 3*b24 =L= 0;
e33.. i19 - 3*b22 =L= 0;
e34.. i20 - 3*b23 =L= 0;
e35.. i21 - 3*b24 =L= 0;
* set non default bounds
x1.up = 80;
x2.up = 25;
x3.up = 45;
x4.up = 2950;
x5.up = 2950;
x6.up = 2950;
x7.up = 400;
x8.up = 400;
x9.up = 400;
x10.up = 350;
x11.up = 350;
x12.up = 350;
x13.up = 1;
x14.up = 1;
x15.up = 1;
i16.up = 3;
i17.up = 3;
i18.up = 3;
i19.up = 3;
i20.up = 3;
i21.up = 3;
$if set nostart $goto modeldef
* set non default levels
x1.l = 30;
x4.l = 3000;
x7.l = 400;
x10.l = 150;
x13.l = 0.33;
x14.l = 0.33;
x15.l = 0.33;
* set non default marginals
$label modeldef
Model m / all /;
m.limrow=0; m.limcol=0;
$if NOT '%gams.u1%' == '' $include '%gams.u1%'
$if not set MINLP $set MINLP MINLP
Solve m using %MINLP% minimizing objvar;
Last updated: 2025-08-07 Git hash: e62cedfc