This model calculates the annual total cost of the Swiss energy system, which is decomposed into the following elements:
For each of these elements the annual total cost () is calculated as shown in the following equation,
The investment cost is calculated for each year (2011, 2035 and 2050) by assuming that the complete energy system is entirely replaced during the selected year, taking into account the relative prices and the technology development status. The investment cost is annualised based on the interest rate as in the following equation,
This assumption allows comparing the investment cost of 2011 with those for 2035 and 2050, without having to consider any installation/decommissioning pathway.
The inputs of the cost sub-model are the “Fuel Prices”, “Investment cost” and “Interest rate” sliders. The extreme values of these three inputs are “1” and “3”, with “1” assuming the lowest value for the costs, and “3” the highest values.
The “Fuel prices” input defines which of the 3 price levels is selected for the cost calculation. The following table shows the production prices, or prices at the Swiss border, if the resource is imported. Taxation is not accounted for in the cost calculations.
|Heating fuel oil||6.54 ||6.99||8.60||11.24||6.52||9.83||12.58|
|Imported electricity [ctsCHF/kWhe]||15.90 ||15.90||24.00||32.10 ||15.90||24.75||33.60 |
The prices for fossil fuels in 2035 and 2050 are calculated by the following equations, taking into account the 2010 prices and the three evolution paths forecast by the European Commission .
Bioethanol and Biodiesel are considered to have the same price evolution as the fuel they substitute (gasoline and diesel respectively). The price for wood in 2035 and 2050 is calculated following the same methodology used for the fossil fuel prices, but the evolution is based on the wood price forecasts in .
The “Investment cost” input determines which of the 3 levels of specific investment cost is considered. More information about the considered specific investment costs is available in the supply technology pages.
The “Interest rate” slider sets the interest rate. The defined range for the interest rate is [1.73, 4.70] %. It should be noted that these values are based on the observed performances of the electricity production companies in 2012.