<td>The cost (in dollars per tonnes) that the plant incurs to process each tonnes of input. Must be a timeseries.</td>
</tr>
<tr>
<tdalign="left"><code>base capacity</code></td>
<td>The amount of input (in tonnes) the plant can process when zero dollars are spent on expansion. If unlimited, this key may be omitted.</td>
</tr>
<tr>
<tdalign="left"><code>max capacity</code></td>
<td>The amount (in tonnes) the plant can process when the maximum amount of dollars are spent on expansion. If unlimited, this key may be omitted.</td>
</tr>
<tr>
<tdalign="left"><code>expansion cost</code></td>
<td>The cost (in dollars per tonnes) to increase the plant capacity beyond its base capacity. If zero, this key may be omitted. Must be a timeseries.</td>
</tr>
<tr>
<tdalign="left"><code>disposal</code></td>
<td>A dictionary describing what products can be disposed locally at the plant.</td>
</tr>
@ -340,6 +316,29 @@
</tr>
</tbody>
</table>
<p>The keys in the <code>capacities</code> dictionary should be the amounts (in tonnes). The values are dictionaries with the following keys:</p>
<table>
<thead>
<tr>
<thalign="left">Key</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<tdalign="left"><code>opening cost</code></td>
<td>The cost (in dollars) to open a plant of this size.</td>
@ -91,12 +91,6 @@ Each type of plant is associated with a set of potential locations where it can
|:------------------------|---------------|
| `latitude` | The latitude of the location, in degrees.
| `longitude` | The longitude of the location, in degrees.
| `opening cost` | The cost (in dollars) to open the plant.
| `fixed operating cost` | The cost (in dollars) to keep the plant open, even if the plant doesn't process anything. Must be a timeseries.
| `variable operating cost` | The cost (in dollars per tonnes) that the plant incurs to process each tonnes of input. Must be a timeseries.
| `base capacity` | The amount of input (in tonnes) the plant can process when zero dollars are spent on expansion. If unlimited, this key may be omitted.
| `max capacity` | The amount (in tonnes) the plant can process when the maximum amount of dollars are spent on expansion. If unlimited, this key may be omitted.
| `expansion cost` | The cost (in dollars per tonnes) to increase the plant capacity beyond its base capacity. If zero, this key may be omitted. Must be a timeseries.
| `disposal` | A dictionary describing what products can be disposed locally at the plant.
| `capacities` | A dictionary describing what plant sizes are allowed, and their characteristics.
@ -108,6 +102,14 @@ The keys in the `disposal` dictionary should be the names of the products. The v
| `limit` | The maximum amount (in tonnes) that can be disposed of. If an unlimited amount can be disposed, this key may be omitted. Must be a timeseries.
The keys in the `capacities` dictionary should be the amounts (in tonnes). The values are dictionaries with the following keys:
| Key | Description
|:------------------------|---------------|
| `opening cost` | The cost (in dollars) to open a plant of this size.
| `fixed operating cost` | The cost (in dollars) to keep the plant open, even if the plant doesn't process anything. Must be a timeseries.
| `variable operating cost` | The cost (in dollars per tonnes) that the plant incurs to process each tonne of input. Must be a timeseries.
### Example
```json
@ -123,33 +125,30 @@ The keys in the `disposal` dictionary should be the names of the products. The v
"L1": {
"latitude": 0.0,
"longitude": 0.0,
"opening cost": [500, 500],
"base capacity": 250.0,
"max capacity": 1000.0,
"expansion cost": [1.0, 1.0],
"fixed operating cost": [30.0, 30.0],
"variable operating cost": [30.0, 30.0],
"disposal": {
"P2": {
"cost": [-10.0, -10.0],
"cost": [-10.0, -12.0],
"limit": [1.0, 1.0]
}
},
"capacities": {
"100": {
"opening cost": [500, 530],
"fixed operating cost": [300.0, 310.0],
"variable operating cost": [5.0, 5.2]
},
"P3": {
"cost": [-10.0, -10.0],
"limit": [1.0, 1.0]
"500": {
"opening cost": [750, 760],
"fixed operating cost": [400.0, 450.0],
"variable operating cost": [4.5, 4.7]
},
"700": {
"opening cost": [1000, 1000],
"fixed operating cost": [500.0, 600.0],
"variable operating cost": [4.0, 4.4]
}
}
},
"L2": {
"latitude": 0.5,
"longitude": 0.5,
"opening cost": [1000, 1000],
"base capacity": 0.0,
"max capacity": 10000.0,
"expansion cost": [1.0, 1.0],
"fixed operating cost": [50.0, 50.0],
"variable operating cost": [50.0, 50.0]
}
}
}
}
}
@ -160,6 +159,5 @@ Model Assumptions
-----------------
* Each plant can only be opened exactly once. After open, the plant remains open until the end of the simulation.
* Plants can be expanded at any time, even long after they are open.
* Variable and fixed operating costs do not change according to plant size.
* All material available at the beginning of a time period must be entirely processed by the end of that time period. It is not possible to store unprocessed materials from one time period to the next.
