Modelling Partial Load Efficiency
#8
Dear Vsaini,

I tested now the same case as previously, but without ramping constraints. The number of equations dropped down to about 205,000.  The solve summary is shown below:
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              S O L V E      S U M M A R Y

    MODEL   TIMES               OBJECTIVE  OBJz
    TYPE    LP                  DIRECTION  MINIMIZE
    SOLVER  CPLEX               FROM LINE  47050

**** SOLVER STATUS     1 Normal Completion        
**** MODEL STATUS      1 Optimal                  
**** OBJECTIVE VALUE        674911478.2906

RESOURCE USAGE, LIMIT         18.250     50000.000
ITERATION COUNT, LIMIT       111        550000
______________________________________________________________


As you can see, in this case the solution time decreased from 24.8 secs to 18.3 secs, i.e. about 26%, while the number of iterations increased from 109 to 111. The impact of removing the ramping constraints thus appears to confirm your findings.
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Messages In This Thread
Modelling Partial Load Efficiency - by vsaini - 29-12-2016, 04:14 PM
RE: Modelling Partial Load Efficiency - by vsaini - 30-12-2016, 05:28 PM
RE: Modelling Partial Load Efficiency - by vsaini - 05-01-2017, 05:31 PM
RE: Modelling Partial Load Efficiency - by vsaini - 17-05-2017, 02:37 PM
RE: Modelling Partial Load Efficiency - by vsaini - 22-05-2017, 10:36 AM
RE: Modelling Partial Load Efficiency - by Antti-L - 23-05-2017, 01:21 PM

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