Co-Products

Co-Products are resources which are secondary products created alongside the main output which can be accounted for in the production of that resource. CoProducts can be added to a stationary process from the stationary process editor either by selecting a resource which is not in an input group and right clicking the "Set As Co-Product" option.

Allocation

Calculations

Parameters

• $Out_{value}=Out_{a}*Out_{cost}\,$ = Value associated with the main output amount, after the losses. $Out_{cost}$ = {energy value, market value, mass, volume}
• $Copr_{value}=Copr_{a}*Copr_{cost}\,$ = Value associated with the co-product output amount. $Copr{cost}$ = {energy value, market value, mass, volume}
• $ee\,$ = Energy and Emissions associated to that co product ( in Joules and Grams per unit of Output for the current process )
• $inputs\,$ = Energy and Emissions for all the inputs of the current process ( in Joules and Grams per unit of Output for the current process )

Calculations

For each allocation method it will be the same idea :

• We convert the amount given for the co product into a quantity of energy, mass, market value or volume depending on the allocation method chosen.
• We grab the amount after losses of the main output
• We calculate the allocation ratio which will be :

$r=1-{\frac {Out_{value}}{Out_{value}+Copr_{value}}}\,$

• We calculate the energy and emissions associated to that co product :

$ee=r\cdot inputs\,$

Note : $Out_{value}\,$ and $Copr_{value}\,$ are in the same unit, they can be both in Joules, Grams, Cubic Meter or Dollar depending of the allocation method chosen.

Displacement

Calculations

Parameters

• $MixEE_{mpm}\,$ = conventional material mix energy and emissions, which are the necessary energy and emissions associated to the production of that material for the specified purpose for this specific mix.
• $S_{mpm}\,$ = the share of the conventional material purpose mix displaced.
• $ee\,$ = Energy and Emissions associated to that co product ( in Joules and Grams per unit of Output for the current process )

Calculations

• For each conventional material mix defined in the displacement ratios we grab the mix energy and emissions. We also grab at the same time the conventional material share.
• We add to the co product energy and emissions the amount displaced, by each conventional material displaced :

$ee=ee+MixEE_{mpm}\cdot S_{mpm}\,$

XML Example

This example is extracted from the process Dry Mill Ethanol Production (US Industry Average). It shows a coproduct which is calculated as a displacement. But if the user wants to change the method and calculate it with the allocation method, the different options which will be shown to the user are also defined.

<coproduct ref="116" method="displacement" amount="[dgs_params!A3];0;True;pounds">
  <allocation value="energy" >
    <option>energy</option>
    <option>market</option>
    <option>mass</option>
  </allocation>
  <conventional_products >
    <product ref="75" purpose="stationary" mix="0" ratio="[composite_displacement_ratios!B3];0;True;percentage"/>
    <product ref="117" purpose="stationary" mix="0" ratio="[composite_displacement_ratios!C3];0;True;percentage"/>
    <product ref="91" purpose="stationary" mix="0" ratio="[composite_displacement_ratios!D3];0;True;percentage"/>
  </conventional_products>
</coproduct>

Common Calculations

Parameters

• $S_{copr}\,$ = share of the coproduct
• $ee\,$ = Energy and Emissions associated to that co product ( in Joules and Grams per unit of Output for the current process )

Calculations

At the end of the calculation process for one of this co products we are doing a last operation which is multiplying the $ee\,$ by a share. This share can be used to define many co products and assign them shares. So the last operation will be : $ee=ee*S_{copr}\,$

Co-Product Editor in GUI

File:Co-productEditor.png

Co-Product Editor

Co-Product editor can be used to add and/or edit Co-Products for the process. The editor can be accessed either through Data Editor page or by right clicking on a process in the Well to Pump Setup page and selecting Edit Process Parameters.

Only the existing co-products are shown in the co-product editor. To add a new Co-product, click "Add a Co-Product" in the window. New Co-product is shown in the window as shown in the picture.

Select the Co-product material from the dropdown list which will enable other fields like the amount, share and check boxes to select the available type of treatments for the co-product.

Selecting the "Default Treatment Method" will make use of that treatment method for the calculations in the application.

If "Allocation" treatment method is checked, the allocation type can be selected for the co-product. The available allocation type are given depending upon the characteristics of the co-product material selected.

if "Displacement" treatment method is checked, the Displacement material, Purpose, Mix and Displacement ratio can be selected in the same order. Few of the options can be unavailable depending upon the characteristics of the co-product displacement material selected. Any number of displacement materials can be added along with the specific fields for that displacement material.