Bioenergy Supply Chain Design - Price and Perishability

Below are the links to the biologistic network data instances. You can download all instances using the provided links.

Link 1: Computational Study Data Instances

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Format:

1. There are 20 different classes in the computational study (C1, C2, …, C20), each containing 5 instances, resulting in a total of 100 instances.

2. For the case study, data corresponding to case Case1 is provided. The remaining settings (Case2, Case3, Case4, Case5) can be derived from Case1 based on the definitions outlined in the paper.

3. Facility locations in the computational study are specified using Cartesian (x–y) coordinates, whereas the case study data utilize geographic coordinates (latitude and longitude). As a result, different distance calculation methods are employed for the computational and case study datasets.

4. The time period data includes time zero (t=0) as the initial period.

5. Transportation costs from collection facilities to biorefineries are approximately 10% lower than those from farms to collection facilities or directly to biorefineries, reflecting economies of scale.

6. For each instance, we have the following data files:

· CAPACITIES.txt: Contains the biofuel inventory capacities at biorefineries, biomass inventory capacities at collection facilities, and the production capacities of biorefineries.

· DEMAND.txt: Contains biofuel demand at each blending facility for every time period

· FIXED2.txt: Contains collection facility fixed costs for every time period

· FIXED3.txt: Contains biorefinery fixed costs

· GammaX.csv: Contains break-even prices for all farms

· GammaY.csv: Contains the acreage of the land allocated to switchgrass corresponding to each break-even price

· INDEX.txt: Contains the cardinality of all sets used in the model.

· LOCATION1.txt: Location coordinates of farms

· LOCATION2.txt: Location coordinates of collection facilities

· LOCATION3.txt: Location coordinates of biorefineries

· LOCATION4.txt: Location coordinates of blending facilities

· PARAMETERS.txt: Yield, biofuel price, processing costs, holding and transportation costs for biofuel, holding cost for Switchgrass, conversion rates, switchgrass price levels

7. For the case study, the following additional data files are provided to evaluate distances between facility pairs:

· DISTANCE_IJ.csv: Distance between farms and collection facilities

· DISTANCE_JK.csv: Distance between collection facilities and biorefineries

· DISTANCE_IK.csv: Distance between farms and biorefineries

· DISTANCE_KZ.csv: Distance between biorefineries and blending facilities

The legend for the input data format is provided below:

Symbol	Detail
I	Farms
J	Collection facilities
K	Biorefineries
Z	Blending facilities
L	Capacity levels
T	Time period
phi	Switchgrass yield per acre at farms
pi_f	Biofuel price
t_f	Per unit per mile biofuel transportation cost
t_1(ij)	Per unit per mile Switchgrass transportation cost from farm i to collection facility j
t_2(jk)	Per unit per mile Switchgrass transportation cost from collection facility j to biorefinery k
t_3(ik)	Per unit per mile Switchgrass transportation cost from farm i to biorefinery k
f_c(lt)	Amortized fixed cost of hiring and operating a collection facility of size l at location j at time t
f_b(l)	Amortized fixed cost of opening and operating a biorefinery of size l at location k
e_c(l)	Available inventory space for biomass of a collection facility with size l
e_f(l)	Available inventory space for biofuel of a biorefinery with size l
k_f(l)	Biofuel production capacity of a biorefinery with size l
c_pr	Processing cost of one unit of Switchgrass
h_m	Holding cost of one unit of Switchgrass type b for one unit of time
h_f	Holding cost of one unit of biofuel for one unit of time
D(zt)	Amount of biofuel demanded by blending facility z at time t
nu_0	The conversion rate of one unit of fresh Switchgrass to one unit of biofuel
nu_t	The conversion rate of one unit of fresh Switchgrass to one unit of biofuel originated at time t
pi_m	The price level for purchasing of Switchgrass
Fa. Location	Location coordinates of farm i
Col. Location	Location coordinates of collection facility j
Bio. Location	Location coordinates of biorefinery k
Blen. Location	Location coordinates of blending facility z