Modelling Partial Load Efficiency
#6
Dear Vsaini,

I just tested the impact of using Partial Load Efficiencies on the solution time. I used the India+Bangladesh model Anjana provided to me earlier, with 2 regions, 12 seasons, and 24 daily timeslices under each season.

First, I ran the model with just using ACT_MINLD on the coal power plant technologies. Second, I added partial load efficiencies for these processes, defined with ACT_LOSPL. The first model run had about 220,000 equations, and the second run about 230,000 equations.
The solve summaries are shown below:
__________________________________________________________________

              S O L V E      S U M M A R Y

    MODEL   TIMES               OBJECTIVE  OBJz
    TYPE    LP                  DIRECTION  MINIMIZE
    SOLVER  CPLEX               FROM LINE  47049

**** SOLVER STATUS     1 Normal Completion        
**** MODEL STATUS      1 Optimal                  
**** OBJECTIVE VALUE        674909148.9309

RESOURCE USAGE, LIMIT         21.684     50000.000
ITERATION COUNT, LIMIT        99        550000
__________________________________________________________________

              S O L V E      S U M M A R Y

    MODEL   TIMES               OBJECTIVE  OBJz
    TYPE    LP                  DIRECTION  MINIMIZE
    SOLVER  CPLEX               FROM LINE  47049

**** SOLVER STATUS     1 Normal Completion        
**** MODEL STATUS      1 Optimal                  
**** OBJECTIVE VALUE        674911478.3480

RESOURCE USAGE, LIMIT         24.804     50000.000
ITERATION COUNT, LIMIT       109        550000
__________________________________________________________________

As you can see, in this case using the Partial Load Efficiencies increased the solution time from 21.7 secs to 24.8 secs, i.e. about 14%, while the number of iterations increased from 99 to 109.
I am thus not able to see any large impact on the solution time.
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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 Antti-L - 18-05-2017, 02:02 PM
RE: Modelling Partial Load Efficiency - by vsaini - 22-05-2017, 10:36 AM

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