Local Energy Solutions

Scaling ETM scenarios to testing ground level

Scaling the national scenario to testing ground level

Upon reaching the "Scale this scenario" page, you have the option to choose how many residences will be present in the scaled testing ground scenario (see Figure 1 below).

Figure 1. The scaling interface. Number of residences and sectors can be chosen.

It is possible to explicitly exclude the following sectors from the testing ground

• Agriculture (excluded by default)
• Energy sector (included by default but with scaled down numbers)
• Industry (excluded by default)

Scaling of the national scenario to testing ground size happens as follows: all production and demand of energy is reduced by a fixed factor, which is the specified value for the scaling variable divided by the original value of the scaling variable.

If the national scenario, for instance, contains 10 million residences and your testing ground contains only 100 residences the scaling factor is given by:

scaling factor = 100 / 10,000,000 = 0.00001

All energy in the national scenario will be multiplied by 0.00001 to get the testing ground scenario. In addition to energy, the quantities of all technologies are scaled equivalently. For example, if the national scenario contains a million combi-boilers, using a scale factor of 0.00001 means there are only 10 combi-boilers are present in the testing ground scenario.

Note: It may happen that scaling results in fractional numbers (e.g., 123.4 combi boilers.). In those cases, the number will be rounded to the closest integer. Exceptions to this rule are large power plants. It is possible to place 0.3 nuclear power plants in the testing ground.

Excluding sectors from the testing ground

There are some sectors in the ETM that are less relevant for small-scale pilot projects:

• Industry
• Agriculture
• Energy (centralized production of electricity and heat)

You can exclude these from your testing ground by using the checkboxes in the scaling interface. This means that these sectors will have no energy demand or production, and are omitted from the interface.

However, if you choose to include these sectors in the testing ground scenario, their energy demand and production will be scaled with the scaling factor as described above.

Adapting the testing ground scenario

The scaled scenario still has most of its properties equal to the national scenario that it originated from. The percentage of electric cars, or the number of solar panels is per household is still the same. You can now use the familiar professional interface of the ETM to update your testing ground scenario.

The interface for the testing ground scenario is identical to the standard ETM interface with some modifications:

• The sectors excluded in the scaling step (optional) are removed from the interface
• The "other" sector (this is a statistical residual and irrelevant to the pilot)
• The section on storage (it will be replaced by more detailed calculations on testing ground level)
• The section on production of primary energy carriers is removed
• The section on network costs (it is replaced by the more detailed calculations on testing ground level)
• The section on fuel chain emissions is omitted