|
|
| (3 intermediate revisions by the same user not shown) |
| Line 21: |
Line 21: |
| <math>NG_{feed}=(\frac{10^6}{eff} - (10^6(\frac{1}{eff}-1)\cdot Share_{Electricity}))\cdot Feed As Process Fuel) - 10^6</math> | | <math>NG_{feed}=(\frac{10^6}{eff} - (10^6(\frac{1}{eff}-1)\cdot Share_{Electricity}))\cdot Feed As Process Fuel) - 10^6</math> |
|
| |
|
| Moreover we know that <math>NG = NG_{pf} + NG_{feed}\,</math> so from there we just have to find what are the shares of the <math>NG_{pf}\,</math> and <math>NG_{feed}\,</math>, and assign one of them to a technology, the other to the chemical reaction.
| | The total NG used by this process is given by : <math>NG = NG_{pf} + NG_{feed}\,</math>, now the technologies will be assigned to the total NG |
| <br><br>
| |
| <b>Working on <math>NG_{pf}\,</math> : </b><br>
| |
| <math>NG_{pf}=(\frac{10^6}{eff} - (10^6(\frac{1}{eff}-1)\cdot Share_{Electricity}))\cdot(1-Feed As Process Fuel)</math><br><br>
| |
| As <math>1=Share_{electricity}+Share_{NG}\,</math><br><br>
| |
| <math>NG_{pf}= 10^6( \cdot ( \frac{1}{eff} -1) \cdot Share_{NG} + 1) \cdot(1-Feed As Process Fuel)</math><br><br>
| |
| <math>NG_{pf}= (10^6 \cdot ( \frac{1}{eff} -1) \cdot Share_{NG} + 10^6) \cdot(1-Feed As Process Fuel)</math><br><br>
| |
| <math>NG_{pf}= (10^6 \cdot ( \frac{1}{eff} -1) \cdot Share_{NG}) \cdot (1+ \frac{10^6}{10^6 \cdot ( \frac{1}{eff} -1) \cdot Share_{NG}}) \cdot(1-Feed As Process Fuel)</math><br><br>
| |
| <math>NG_{pf}= NG \cdot Share_{BoilerTechnology}</math><br><br>
| |
| where <math>Share_{BoilerTechnology} = (1+ \frac{10^6}{10^6 \cdot ( \frac{1}{eff} -1) \cdot Share_{NG}}) \cdot(1-Feed As Process Fuel)</math>
| |
| This means that if the efficiency of the process is changed, out shares between the Chemical reaction and the NG Industrial Boiler has to be changed too.
| |
| We don't want to have this anymore so we will just assign fixed numbers for the technology shares.
| |
| For the NG process fuel it will be distributed among the Boiler and the SMR technologies, calculated with the 71.5% efficiency and 83% Share of feedstock input as feed, we got :
| |
| *<math>Share_{BoilerTechnology}=0.597345919909995\,</math>
| |
| *<math>Share_{SMRTechnology}=0.402654080090005\,</math>
| |
|
| |
|
| ===Results=== | | *<math>Share_{BoilerTechnology}=0.17\,</math> |
| [[File:g_h2_production_net.jpg|100px|thumb|left|LH2 Storage in .net rev 3328]] | | *<math>Share_{SMRTechnology}=0.83\,</math> |
| As we can see here, all the numbers without upstream are matching perfectly, but not for the SOx emissions. There might be an issue in the SOx balance for that process.
| | |
| | ===In GREET now=== |
| | |
| | Now in GREET this process has two inputs, Natural Gas and Electricity. This process is modeled without any co products, no Steam nor Electricity is displaced or allocated, this is going to be worked out later. |
| | |
| | [[File:g_h2_production_net.jpg|200px|thumb|right|G.H2 Production from NG in .net]] |
G.H2 Production
In Excel
This process can only be find on the Hydrogen spreadsheet, cell B62. This process defines a Share of feedstock input as feed( the rest as process fuel) value. We are going to handle this in a different way in the .net version but which is equivalent. Basically instead of having a part of the process fuel in Natural Gas and another part in Natural Gas : Feed loss as it is done in GREET Excel 1.8d.0, we are going to introduce a chemical reaction technology. The remaining NG which is coming from the feed and used as a process fuel will go through that Chemical Reaction Process, will produce 0 emissions, but will be accounted as a energy consumption.
In .net
Assumptions
We are trying to calculate some shares for the NG actually burned, and the NG lost in the chemical reaction.
The formula :
is usually giving us the amount of NG process fuel used, here in that case a part of it will be used within the process without any combustion.
In Excel, the amount of process fuel is given by :
And the amount of fuel used as feed is given by :
The total NG used by this process is given by : 
, now the technologies will be assigned to the total NG
In GREET now
Now in GREET this process has two inputs, Natural Gas and Electricity. This process is modeled without any co products, no Steam nor Electricity is displaced or allocated, this is going to be worked out later.
G.H2 Production from NG in .net
