Hello,
SAM reports several versions of the system's annual electricity output. For the CSP power tower model:
Annual Energy (from Metrics table) is the total annual electric output of the system, after adjustment factors from the
Performance Adjustment page
are applied. This value is equal to Net Electric Output (see below) adjusted by the performance adjustment factors. For the default case, Annual Energy = Net Electric Output * Percent of Annual Output.
Gross Electric Output (from Tables, Single Values) is the system's gross electric output before parasitic losses.
Net Electric Output (from Tables, Single Values) is the system's net electric output after parasitic losses.
You can confirm the relationship between the gross and net values as follows:
1. On the results page, click Tables and expand the Hourly Data list.
2. Check the boxes for "Gross electric power output (MWh), hourly," "Total parasitic consumption (MWh), hourly," and "Net electric power output (kWh),hourly."
3. Click Send to Excel.
4. In Excel, you can see that, for each hour, Net Output = Gross Output - Parasitic Consumption.
Best regards,
Paul.
