Step 5: Prorate Networks
Once the theoretical volumes are calculated, networks can be prorated based on the inputted meter readings. This is done on the Networks page under the Organization tab in the Navigation bar.
The Volumetric Determination Method in the Networks table is an attribute that outlines whether the meter behaved as a Meter (Measured) or Meter (Derived).
Prorating Measured Networks
- Click into the Measured Meter Network Name.
- Navigate to the Calculations tab.
- Use the calendar filter to navigate to the month in which you would like to prorate the network.
- The Network Records page provides an overview of all of the flows within the network, along with their Flow Type.
- The checkbox next to each flow allows you to select which flows should be adjusted as part of the network proration. For Measured Networks, the following flows should be adjusted (as per the AQM):
- All Secondary flows with Type: ‘Fuel’.
- Once all flows that need to be adjusted are selected, click on the “Preview” button. This action will update the Adjusted Volume column to display the adjusted volume for each selected flow.
- If you encounter a message stating “Unable to perform network proration”, please refer to the Why is Network Proration Unavailable? section.
- Click on the “Promote” button. This action will overwrite all theoretical volumes with the adjusted volumes, and display them in the Volume Input column.
- Repeat steps 1 - 7 for all Measured Meter Networks.
Prorating Derived Networks
The process to prorate Derived Networks follows the same process outlined above to prorate Measured Networks, but ONLY ONE flow in the Derived Network should be adjusted, which is the ‘Left Over Gas Volume’ flow with Type: ‘Recovered’. The steps to prorate Derived Networks are outlined below:
- Click into the Derived Meter Network Name.
- Navigate to the Calculations tab.
- Use the calendar filter to filter for the current month.
- The checkbox next to each flow allows you to select which flows should be adjusted as part of the network proration. For Derived Networks, only the following flow should be adjusted:
- The ‘Left Over Gas Volume’ flow with Type: ‘Recovered’
- Click on the “Preview” button. This action will update the Adjusted Volume column for the Left Over Gas Volume flow to be:
- Adjusted Volume for the Left Over Gas Volume Flow = [Derived Meter Volume - Sum of Theoretical Volumes from all other Flows in the Derived Network]
- Click on the “Promote” button. This action will update the Left Over Gas Volume flow to the calculated volume outlined in step 5.
- Repeat steps 1 - 7 for all Derived Meter Networks.
NOTE: Our Product team is working to upgrade the network proration workflow to enable:
- Bulk proration of networks (we are aiming to release this functionality at the end of February).
- Saving the configuration of flows that should be adjusted during network proration.
- Comparison of theoretical vs. adjusted volumes (including proration factors), and ability to view an audit trail of how theoretical volumes are calculated.
Your Validere Services Contact will reach out to you as these upgrades become available to provide training.
Why is Network Proration Unavailable?
Network proration will not run for a network in Carbon Hub if one of the following three conditions are met:
- No volume record is inputted on the Primary flow in the network. In other words, the meter reading is not entered.
- The summation of theoretical fuel combusted volumes (Type: ‘Fuel’) is not greater than 0.
- The summation of theoretical fuel vented (Type: ‘Vent’) + theoretical fuel flared (Type: ‘Flare’) + theoretical fuel recovered (Type: ‘Recovered’) is greater than the volume record on the Primary flow in the network.
When network proration is not enabled for a network, the theoretical volumes will be reported out instead.