|
Variables/
parameters/
subscripts | Unit | Definition |
|
| Variables | | |
| | Ha | Switchgrass produced annually |
| AH | Ha | Switchgrass harvested monthly from November to February |
| XC | Mg | Switchgrass produced annually |
| XH | Mg | Switchgrass harvested monthly from November to February |
| XTN | Mg | Switchgrass transported directly to the biorefinery after harvest from November to February |
| NXS | Mg | Tons of switchgrass newly stored monthly from November to February |
| XS | Mg | Switchgrass stored monthly from November to October |
| XTO | Mg | switchgrass transported from storage to the biorefinery from March to October |
| Numb | | Number of equipment used in harvest |
| | Kl | Quantity of ethanol produced in each month |
| Parameters | | |
| BEP | $/ha | Breakeven price of planting switchgrass as an alternative to traditional crops |
| Γ | $/ton | Storage cost per ton |
| Θ | $/ton | Transportation cost per ton from field to the biorefinery |
| Aa | ha | Cropland available in each hexagon for each crop |
| | Mg/ha | Switchgrass yield |
| DMLstor | % | Dry matter loss during storage |
| DMLtrans | % | Dry matter loss during transportation |
| Mtb | hour/ha | Machine time per ha for each machinery |
| Avehour | hour | Available average working hours of machinery in each month |
| Λ | kl/Mg | Conversion rate of switchgrass to ethanol |
| Subscripts | | |
| | Month |
| | Locations of biomass production field |
| | Location of the biorefinery |
| | Crop type |
| | Harvest method (square baler, round baler) |
| | Storage protection method |
|
