==Introduction/Preface==
The implementation of the .net version of Greet required us to model the data in Greet excel. This includes the ETOH sheet of Greet excel. The ETOH data sheet contains many calculations that are not done in other portions of Greet. The purpose of this document is to summarize these differences, and explain our execution of this portion of our .net model in further detail.

For the most part the ETOH data is implemented in the same manner as all the other data. However, their are some topics that need clarification for users and scientists alike. The main points to focus on are feed & fuel, main input, yields, and co-products.

==Feed & Fuel==
[[File:FeedFuelExcel.png|thumb|right|300px|Feed and Fuel in Greet Excel 2011 ETOH Sheet cell C255]]

In Greet excel their is a split in the data results between feed & fuel. Fuel refer to the fuel being fuel being produced. This is a final product such as Ethanol, Fisher Tropsh Diesel, Conventional Gasoline etc. The feed, or feed stock, refers to the main resource used to produce this fuel. For example for Ethanol it can be corn. In the case of Conventional Gasoline it will be crude. In Greet excel the results are split between these two categories. For example in ETOH they will show emission output and energy consumption for the corn used to make the Ethanol, and then in a separate column show the energy and emissions corresponding to Ethanol. Examples of feed and fuel in Greet excel are shown the right.

In our implementation of Greet .net we do not formally split fuel from feed. We total all our data on a life cycle basis. The final results we generated encompass the total life of the fuel not just the feed half and the fuel half, but both. However, a user can easily obtain the energy and emission data pertaining to a certain step of the fuels life.

The best way this can be shown is by example. Below is a screen shot of Corn Stover to Ethanol from Greet .net. The results shown to the left are for the final process, the transportation process. Since this is the final process the results shown are for the entire life cycle for the fuel as described above. If a user wishes to obtain the data for the fuels life right before the transportation process they can press the "Corn Stover to Ethanol via Fermentation" process, and greet will show data for the fuels life up to that point.

In addition it should be noted that at the beginning of this pathway their is a "Feed" of Corn Stover. This is analogous to the fuel & feed split in Greet excel. By hovering your mouse over the "Feed" it expands reveling the data as shown below. By click the "Feed: Corn Stover" hyperlink Greet will open up the Corn stover mix and reveal the pathways and processes that generate this data. Once again a user can click on these to view the energies and emissions corresponding to different stages of the fuels life.

[[File:FeedFuelDotNet.png|320px|Corn Stover Results as shown in Greet.net]]

==Main Input==
The main input refers the energy content of the initial amount of resource put into a fuels production life. For example the main input of most Ethanol pathways would be corn. In the case of Compressed Natural Gas the main input would be some initial amount of natural gas. Both Greet Excel and Greet.net incorporate this input into their life cycle analyses. However, the way it is accounted for in each is different. In the .net model of Greet is always added to the results. However, this is not the case for Greet excel.

In the ETOH sheet of Greet excel it is not accounted for in the final results. This can easily be noted by comparing results between the two models. To compare Greet Excel ETOH data to Greet.net one must add the results of the Fuel and the Feed because as described above Greet .net does not make that division. Once added together one will notice that the emissions (VOC, CO, NOx, PM10, SOx, etc.) are relatively close in value. However, the energy is off by a factor of a million btu. This is because in Greet.net we include the initial one million but from the main input, but in Greet Excel they do not. To compare the results simply add a million to excel or subtract a million for the .net results.

In the case of sugar cane ethanol and corn acetone the main input is not one million btu, so one must subtract the portion of the energy represented by the main input. This will be specified as sugar cane or corn respectively in the Greet.net results. It must be stressed that in regards to the main input what is done in Greet Excel or what is done in Greet .net are both right. It is simply two different ways to interpret the same data.

==Yields==
[[File:YieldsExcel.png|thumb|300px|]]
The ETOH sheet utilizes yields to indicate the amount of product that can be produced from a certain amount of feed. For example they will indicate how much corn it takes to create a single gallon of Ethanol, or how much switch grass is needed to create a single gallon of ethanol fuel. Throughout the ETOH sheet corn, herbaceous and etc. data are calculated at a per bushel basis. They show how much energy is consumed and how many emissions are produced per bushel of feed harvested. However, they calculate the ethanol production in a per gallon basis. In other words how much energy and how many emissions per gallon of Ethanol produced. The yields fills the gap between these two ways of calculated results, so that a totaled result can be calculated in a per one million btu basis. Screen shots of the yields shown in Greet Excel are shown. They are primarily found in two tables. In the screenshot they are highlighted in green so they can be easily identified.

[[File:YieldsExcel1.png|400px|]]

In Greet.net these yield are used in a very similar fashion. The "Feed" portion of our data would be calculated in a per bushel basis, and then it is imputed into a fuel production pathway designed for a per gallon basis. This is shown in the screenshot below. The yield value is in a text box highlighted in blue:

[[File:YieldsDotNet.png|400px|Yields Utilized in Greet.net]]

==Co-Products==

In both Greet.net and Greet Excel Co-Products are a form of credit. A Co-product is something that is produced along side the main product. The energy content of this co-product and emissions saved by otherwise producing it from scratch are credited back to the process. To calculate this credit we specify different resources that are displaced. Their are many co-products in the ETOH spread sheet. The calculation for a Co-production are very straight forward. Below they are shown for energy, but the calculation is exactly the same for emissions:

<math>Energy Credit for Co Production= Energy to Produce Displaced Resource \cdot Displacement Ratio\,</math>

The "Energy to Produce Displaced Resource Normaly" is provided from that resources specific mix and the displacement ratios are calculated in the ETOH sheet. For more information on how Co-Products are implemented in Greet.net refer to the [[Co-Products]] section of the wiki.

It should be noted that in excel the co production formula for Corn has to be adjusted to match Greet .net. The adjustment is shown below:

<math>Energy Credit for Co Production= (Energy to Produce Displaced Resource + Energy Content of Corn) \cdot Displacement Ratio\,</math>

This is because in the case of other resources being displaced such as Urea the heating value is zero. However, corn has a heating value. It has energy and the Greet.net model accounts this. For that reason the energy content of corn itself must be displaced as well.

Ethanol

2012-03-21T17:05:29Z

Aanjum: /* Co-Products */

Ethanol

2012-03-21T17:05:06Z

Aanjum: /* Co-Products */

Ethanol

2012-03-21T17:04:57Z

Aanjum: /* Co-Products */

==Introduction/Preface==
The implementation of the .net version of Greet required us to model the data in Greet excel. This includes the ETOH sheet of Greet excel. The ETOH data sheet contains many calculations that are not done in other portions of Greet. The purpose of this document is to summarize these differences, and explain our execution of this portion of our .net model in further detail.

For the most part the ETOH data is implemented in the same manner as all the other data. However, their are some topics that need clarification for users and scientists alike. The main points to focus on are feed & fuel, main input, yields, and co-products.

==Feed & Fuel==
[[File:FeedFuelExcel.png|thumb|right|300px|Feed and Fuel in Greet Excel 2011 ETOH Sheet cell C255]]

In Greet excel their is a split in the data results between feed & fuel. Fuel refer to the fuel being fuel being produced. This is a final product such as Ethanol, Fisher Tropsh Diesel, Conventional Gasoline etc. The feed, or feed stock, refers to the main resource used to produce this fuel. For example for Ethanol it can be corn. In the case of Conventional Gasoline it will be crude. In Greet excel the results are split between these two categories. For example in ETOH they will show emission output and energy consumption for the corn used to make the Ethanol, and then in a separate column show the energy and emissions corresponding to Ethanol. Examples of feed and fuel in Greet excel are shown the right.

In our implementation of Greet .net we do not formally split fuel from feed. We total all our data on a life cycle basis. The final results we generated encompass the total life of the fuel not just the feed half and the fuel half, but both. However, a user can easily obtain the energy and emission data pertaining to a certain step of the fuels life.

The best way this can be shown is by example. Below is a screen shot of Corn Stover to Ethanol from Greet .net. The results shown to the left are for the final process, the transportation process. Since this is the final process the results shown are for the entire life cycle for the fuel as described above. If a user wishes to obtain the data for the fuels life right before the transportation process they can press the "Corn Stover to Ethanol via Fermentation" process, and greet will show data for the fuels life up to that point.

In addition it should be noted that at the beginning of this pathway their is a "Feed" of Corn Stover. This is analogous to the fuel & feed split in Greet excel. By hovering your mouse over the "Feed" it expands reveling the data as shown below. By click the "Feed: Corn Stover" hyperlink Greet will open up the Corn stover mix and reveal the pathways and processes that generate this data. Once again a user can click on these to view the energies and emissions corresponding to different stages of the fuels life.

[[File:FeedFuelDotNet.png|320px|Corn Stover Results as shown in Greet.net]]

==Main Input==
The main input refers the energy content of the initial amount of resource put into a fuels production life. For example the main input of most Ethanol pathways would be corn. In the case of Compressed Natural Gas the main input would be some initial amount of natural gas. Both Greet Excel and Greet.net incorporate this input into their life cycle analyses. However, the way it is accounted for in each is different. In the .net model of Greet is always added to the results. However, this is not the case for Greet excel.

In the ETOH sheet of Greet excel it is not accounted for in the final results. This can easily be noted by comparing results between the two models. To compare Greet Excel ETOH data to Greet.net one must add the results of the Fuel and the Feed because as described above Greet .net does not make that division. Once added together one will notice that the emissions (VOC, CO, NOx, PM10, SOx, etc.) are relatively close in value. However, the energy is off by a factor of a million btu. This is because in Greet.net we include the initial one million but from the main input, but in Greet Excel they do not. To compare the results simply add a million to excel or subtract a million for the .net results.

In the case of sugar cane ethanol and corn acetone the main input is not one million btu, so one must subtract the portion of the energy represented by the main input. This will be specified as sugar cane or corn respectively in the Greet.net results. It must be stressed that in regards to the main input what is done in Greet Excel or what is done in Greet .net are both right. It is simply two different ways to interpret the same data.

==Yields==
[[File:YieldsExcel.png|thumb|300px|]]
The ETOH sheet utilizes yields to indicate the amount of product that can be produced from a certain amount of feed. For example they will indicate how much corn it takes to create a single gallon of Ethanol, or how much switch grass is needed to create a single gallon of ethanol fuel. Throughout the ETOH sheet corn, herbaceous and etc. data are calculated at a per bushel basis. They show how much energy is consumed and how many emissions are produced per bushel of feed harvested. However, they calculate the ethanol production in a per gallon basis. In other words how much energy and how many emissions per gallon of Ethanol produced. The yields fills the gap between these two ways of calculated results, so that a totaled result can be calculated in a per one million btu basis. Screen shots of the yields shown in Greet Excel are shown. They are primarily found in two tables. In the screenshot they are highlighted in green so they can be easily identified.

[[File:YieldsExcel1.png|400px|]]

In Greet.net these yield are used in a very similar fashion. The "Feed" portion of our data would be calculated in a per bushel basis, and then it is imputed into a fuel production pathway designed for a per gallon basis. This is shown in the screenshot below. The yield value is in a text box highlighted in blue:

[[File:YieldsDotNet.png|400px|Yields Utilized in Greet.net]]

==Co-Products==

In both Greet.net and Greet Excel Co-Products are a form of credit. A Co-product is something that is produced along side the main product. The energy content of this co-product and emissions saved by otherwise producing it from scratch are credited back to the process. To calculate this credit we specify different resources that are displaced. Their are many co-products in the ETOH spread sheet. The calculation for a Co-production are very straight forward. Below they are shown for energy, but the calculation is exactly the same for emissions:

<math>Energy Credit for Co Production= Energy to Produce Displaced Resource \cdot Displacement Ratio\,</math>

The "Energy to Produce Displaced Resource Normaly" is provided from that resources specific mix and the displacement ratios are calculated in the ETOH sheet. For more information on how Co-Products are implemented in Greet.net refer to the [[Co-Products]] section of the wiki.

It should be noted that in excel the co production formula for Corn has to be adjusted to match Greet .net. The adjustment is shown below:

<math>Energy Credit for Co Production= (Energy to Produce Displaced Resource + Energy Content of Corn) \cdot Displacement Ratio\,</math>
This is because in the case of other resources being displaced such as Urea the heating value is zero. However, corn has a heating value. It has energy and the Greet.net model accounts this. For that reason the energy content of corn itself must be displaced as well.

2012-03-21T16:23:15Z

Aanjum: /* Yields */

Ethanol

2012-03-21T16:17:00Z

Aanjum: /* Yields */

File:YieldsDotNet.png

2012-03-21T16:00:26Z

Aanjum:

Ethanol

2012-03-21T16:00:17Z

==Introduction/Preface==

Resources Editor

2012-03-05T04:50:49Z

Aanjum: /* Mix Editor */

[[File:ressources_editor.png|thumb|right|300px|Resources Editor]]
The resources editor is available from the Data Editor. It can be accessed by opening the Data Editor, pressing "Resource", and by selecting either "Add Resource" or "Modify Existing Resource". The purpose of this editor is to adjust the physical properties of a Resource, adjust the mix options of a resource, and edit its memberships. The operation of this editor can be divided into 5 subcategories: '''Resource Parameters''', '''Compatible Resources''',''' Group Memberships''', '''Compatible Mixes & Pathways''', and '''the Mix Editor'''.

==Resource Parameters==
This portion of the editor is where a user can adjust the physical properties and name of a Resource. It is pretty self explanatory. Simply click on the text box corresponding to the physical property you wish to edit, and type in its value. If for any reason the data you are entering is in a different unit right click on the text box and click "Change Unit". This will allow you to change the functional unit to one that is convenient for you.

On the bottom of this user control are two links. They are "Copy Properties from Another Resource" and "Edit Evaporation Properties"

[[File:Evaporation_Properties.png|thumb|200px|Evaporation Properties]]
The first link will allow you to copy the physical properties of an already existing Resource. Upon clicking it a user will be presented a new window displaying all the Resources in Greet. Select one by double clicking it to have that resources physical properties inputted for your Resource.

The second link will allow a user to adjust the evaporation properties of the resource. Upon clicking the link the user will be presented with a pop up window where evaporation properties can be adjusted. This window is shown on the right.

The operation of the Evaporation Properties window is quite straight forward. Select a Gas from the drop down menu adjacent to the "Available Gas:" label. Press the "Add" button. This will add it to the list. Then adjust the percentage associated with the newly added gas. For example if VOC was added, and its percent was adjusted to 100% this means that for every 1g of your Resource that is consumed 1g of VOC is emitted.

[[File:ResourceParameters.png|thumb|none|400px|]]

==Compatible Resources==
[[File:Compatible_Resources.png|thumb|200px|Compatible Resources]]

The compatible resources pane shown on the right allows a user to configure the resources that are compatible with the current resource being edited. By making a material "compatible" a user is indicating that it can be used in the mix for the material.

For example let us say a user is creating Reformulated Gasoline as a resource. Under compatible resources the user can add gasoline additives like MTBE and ETBE. That way when designing the mix of this resource they can incorporate these.

==Group Memberships==
[[File:GroupMemberships.png|left|175px|Group memberships]]
A screenshot of the Group Memberships control can be seen on the left. Memberships are a way to organize Resources. For example Natural Gas, Residual Oil, and Gasoline can be categorized into a group called Petroleum Fuel. It is not necessary give a Resource a membership to a group, but it for data organizational purposes the option is available.

A user can give their resource membership to a group by utilizing the drop down menu under the "Group Memberships" label. This drop down menu can be used to select an existing group. Once a group is selected press the "Add" button to give your resource membership to the group. It will then be added to the list of memberships. Alternatively instead of pressing "Add" a user can select a group and press "Edit" this will allow them to rename the group. Finally if a user wishes to add a new group that is not already included in the drop down menu press "New". This will open up a pop up window that will prompt the user to create one.

==Compatible Mixes & Pathways==
This window represents the mixes and pathways available to build a new mix for this resource. An item of this tree structure can be dragged to the "Mix Editor" to construct a new mix.

==Mix Editor==
[[File:Mix_Editor.png|thumb|Right|400px|Mix Editor]]
The mix editor consists of many parts. The combo box next to the "Select Mix" label shows a list of all the mixes current available for the resource. If you wish to delete a mix or add a new one to this list this can be done via the "Add New" and "Delete Selected" buttons to the right of the combo box. Below the combo box is a text box where you can rename a mix if you wish to do so.

Under the name text box is the actual mix editor. Mixes and pathways from the "Compatible Mixes and Pathways" tree structure can be dragged here to construct a pathway. After you have completed dragging the desired mixes and pathways the shares of these items can be adjusted via their text boxes. A screenshot is shown for ease of reference.

==General Information about Mixes==
[[File:sources_ethanol.png|300px|thumb|right|Ethanol sources]]
Sources are a concept that was introduced to replace the "combined" sections that are actually in GREET Excel. The general concept in GREET.net is to create a resource, and then declare how this resource is obtained or produced. Primary resources are not defining how they are obtained, because we just take them from our environment i.e. Natural Gas, Crude Oil, Sun light, Wind Power,... all those primary sources are what we are trying to account for. The other resources such as Ethanol or Gasoline needs pathways to be produced, and there are many of them. So in order to be specific and declare how a material like Ethanol is produced we define multiple "Sources" for it. A source is usually an aggregation of one or more pathways.

The screenshot on the right details some of the sources for ethanol. From the top to the bottom we can see "Corn Ethanol : Combined Dry and Wet...", "Wet mill production", "Dry mill production" ... those are sources. Organized as branches of these sources names, we can see some green and purples lines. The green lines are representing pathways. So for now we can see that if we want to use ethanol in our car, and specify that we want to use the source "Wet Mill Production", all the ethanol we're going to get in our car is coming 100% from the pathway named "Wet Mill Corn Ethanol Production".
If we choose to use the ethanol from the source "Corn Ethanol : Combined Dry and Wet..." in our car, we can see that our ethanol is coming from two different places, which are purple, they are other sources. In fact we can combined multiple sources under another source, here to create a combined production.

In order to add more sources you can create one by clicking the button "Add". Then some pathways can be drag and dropped over it from the left column, or some sources can be drag and dropped from the right column. Only the compatible materials are shown so whatever is dropped will be compatible for the calculations.

To delete a source, just select it and press the Del key on your keyboard, or right click and delete, or press the Del button

===Mix Purposes===

The mix Purposes are just a way to organize a Mixes. That way in the [[Well to Pump Setup]] view, or the [[Well_to_Pump_Results|Well to Pump Results]]

==Internal Links==
* [[How_to|How to]]
* [[Create_a_Pathway|Create a Pathway]]
* [[Use_Resources_Mix|Back to Use Resources Mix]]

2012-03-05T04:43:20Z

Aanjum: /* Compatible Mixes & Pathways */

Resources Editor

2012-03-05T04:42:20Z

Aanjum: /* Compatible Mixes & Pathways */

Resources Editor

2012-02-21T20:59:00Z

Aanjum: /* Group Memberships */

Resources Editor

2012-02-21T20:58:22Z

Aanjum:

Resources Editor

2012-02-21T20:57:12Z

Aanjum: /* Group Memberships */

[[File:ressources_editor.png|thumb|right|300px|Resources Editor]]
The resources editor is available from the Data Editor. It can be accessed by opening the Data Editor, pressing "Resource", and by selecting either "Add Resource" or "Modify Existing Resource". The purpose of this editor is to adjust the physical properties of a Resource, adjust the mix options of a resource, and edit its memberships. The operation of this editor can be divided into 5 subcategories: '''Resource Parameters''', '''Compatible Resources''',''' Group Memberships''', '''Compatible Mixes & Pathways''', and '''the Mix Editor'''.

==Resource Parameters==
This portion of the editor is where a user can adjust the physical properties and name of a Resource. It is pretty self explanatory. Simply click on the text box corresponding to the physical property you wish to edit, and type in its value. If for any reason the data you are entering is in a different unit right click on the text box and click "Change Unit". This will allow you to change the functional unit to one that is convenient for you.

On the bottom of this user control are two links. They are "Copy Properties from Another Resource" and "Edit Evaporation Properties"

[[File:Evaporation_Properties.png|thumb|200px|Evaporation Properties]]
The first link will allow you to copy the physical properties of an already existing Resource. Upon clicking it a user will be presented a new window displaying all the Resources in Greet. Select one by double clicking it to have that resources physical properties inputted for your Resource.

The second link will allow a user to adjust the evaporation properties of the resource. Upon clicking the link the user will be presented with a pop up window where evaporation properties can be adjusted. This window is shown on the right.

The operation of the Evaporation Properties window is quite straight forward. Select a Gas from the drop down menu adjacent to the "Available Gas:" label. Press the "Add" button. This will add it to the list. Then adjust the percentage associated with the newly added gas. For example if VOC was added, and its percent was adjusted to 100% this means that for every 1g of your Resource that is consumed 1g of VOC is emitted.

[[File:ResourceParameters.png|thumb|none|400px|]]

==Compatible Resources==
[[File:Compatible_Resources.png|thumb|200px|Compatible Resources]]

The compatible resources pane shown on the right allows a user to configure the resources that are compatible with the current resource being edited. By making a material "compatible" a user is indicating that it can be used in the mix for the material.

For example let us say a user is creating Reformulated Gasoline as a resource. Under compatible resources the user can add gasoline additives like MTBE and ETBE. That way when designing the mix of this resource they can incorporate these.

==Group Memberships==
[[File:GroupMemberships.png|left|175px|Group memberships]]
A screenshot of the Group Memberships control can be seen on the left. Memberships are a way to organize Resources. For example Natural Gas, Residual Oil, and Gasoline can be categorized into a group called Petroleum Fuel. It is not necessary give a Resource a membership to a group, but it for data organizational purposes the option is available.

A user can give their resource membership to a group by utilizing the drop down menu under the "Group Memberships" label. This drop down menu can be used to select an existing group. Once a group is selected press the "Add" button to give your resource membership to the group. It will then be added to the list of memberships. Alternatively instead of pressing "Add" a user can select a group and press "Edit" this will allow them to rename the group. Finally if a user wishes to add a new group that is not already included in the drop down menu press "New". This will open up a pop up window that will prompt the user to create one.

==Resource attributes==
'''State''' 
Defines the state of the resource, liquid, solid, gaseous or undefined. It is used by the transportation processes to determine the energy intensities or to check if a mix of different resources is coherent, we assume that to mix resources together they have to be in the same physical state, or if they are not, they must be compatible. Some resources such as Electricity or Wind Energy might use an "undefined" state.

'''Name''' 
A name that defines the resource.

'''Compatible resources''' 
Defines which resources can be mixed together. If I want to be able to mix together Flared Gas and Natural Gas in order to create some new source, FG must be in the compatible list of NG and vice-verse. To add compatible resources, click the add button and select the resource to add. To remove one from the list, select it in the drop down menu and press Delete.

'''Density, LHV, HHV''' 
Those properties are used between processes and pathways in order to converts amount of materials between the solid, liquid, volume or energy quantities. This is one of the really powerful features of GREET.net, if a process output 3.1415 joules of material A, and the next process needs 2.4141 cubic meter of material A, the conversion from joules to cubic meters will be done automatically during the calculations using those properties. It is best to have all of them for most of the materials so, there will be less trouble creating and connecting processes together.

'''Sulfur and Carbon ratios''' 
Sulfur and Carbon ratios are used for the balanced emission of the processes. They are used to calculate carbon and sulfur content of the resources and balance the CO2 and SOx emissions accordingly to the other emissions already known.

'''Alternative Names''' 
Those are just a help in order to easily find materials like Methyl Ester and Renewable Diesel which are the same resource. A lot of acronyms are also written in the alternative names like NG for natural gas, LPG, CNG...

==Memberships==
'''Group Memberships''' 
[[File:group_memberships.png|thumb|left|150px|Memberships]]
Groups are used to assign some "categories" to the resources in order to regroup them for the results. Each material can be part of none or multiple groups. To select which groups the current resource is a member of click on the drop down box and choose a group you want to register to, then click the "Add" button. This should put the selected group in the list of memberships below. Sometimes it might add multiple groups even if you've only selected one group to be a member of. This is because of inheritance groups. The resource "Corn Stover" is a member of the "Renewable" group, but the "Renewable" group itself is a member of the "Non Fossil Fuel" group, therefore the resource "Corn Stover" is a member of both groups "Renewable" and "Non Fossil Fuel", this is why if you add it to the "Renewable" group only, the "Non Fossil Fuel" will be added automatically.

Then in any results shown in the GREET.net you will see usually a list of resources and a list of groups. In order to know the total amount of energy used or resources used, the sum of the resources must be used, and not the list of groups. The sum of the groups does not have any really meaning because the same resource can be a member of multiple groups.

==Mixes==
[[File:sources_ethanol.png|300px|thumb|right|Ethanol sources]]
Sources are a concept that was introduced to replace the "combined" sections that are actually in GREET Excel. The general concept in GREET.net is to create a resource, and then declare how this resource is obtained or produced. Primary resources are not defining how they are obtained, because we just take them from our environment i.e. Natural Gas, Crude Oil, Sun light, Wind Power,... all those primary sources are what we are trying to account for. The other resources such as Ethanol or Gasoline needs pathways to be produced, and there are many of them. So in order to be specific and declare how a material like Ethanol is produced we define multiple "Sources" for it. A source is usually an aggregation of one or more pathways.

The screenshot on the right details some of the sources for ethanol. From the top to the bottom we can see "Corn Ethanol : Combined Dry and Wet...", "Wet mill production", "Dry mill production" ... those are sources. Organized as branches of these sources names, we can see some green and purples lines. The green lines are representing pathways. So for now we can see that if we want to use ethanol in our car, and specify that we want to use the source "Wet Mill Production", all the ethanol we're going to get in our car is coming 100% from the pathway named "Wet Mill Corn Ethanol Production".
If we choose to use the ethanol from the source "Corn Ethanol : Combined Dry and Wet..." in our car, we can see that our ethanol is coming from two different places, which are purple, they are other sources. In fact we can combined multiple sources under another source, here to create a combined production.

In order to add more sources you can create one by clicking the button "Add". Then some pathways can be drag and dropped over it from the left column, or some sources can be drag and dropped from the right column. Only the compatible materials are shown so whatever is dropped will be compatible for the calculations.

To delete a source, just select it and press the Del key on your keyboard, or right click and delete, or press the Del button

===Mix Purposes===

The mix Purposes are just a way to organize a Mixes. That way in the [[Well to Pump Setup]] view, or the [[Well_to_Pump_Results|Well to Pump Results]]

==Internal Links==
* [[How_to|How to]]
* [[Create_a_Pathway|Create a Pathway]]
* [[Use_Resources_Mix|Back to Use Resources Mix]]

File:GroupMemberships.png

2012-02-21T20:50:44Z

Aanjum: uploaded a new version of "File:GroupMemberships.png"