# Ski Day Research Paper

Satisfactory Essays
In the previous section it was investigated that the same capacity can be reached by varying the number of vehicles and the velocity. In this section three operational strategies are investigated which reduce the energy consumption of a representative day in winter season. Typically, a ski day has seven hours from 9 pm to 4 am. In the morning the capacity is often much higher than in the afternoon.
Figure \ref{fig:capacity_day} depicts the capacity in \% for each operation hour. In sum this example leads to a transportation of 9055 persons per day. By using 84 vehicles and a velocity of 5 m/s this results in an energy consumption of 3044 kWh. In principle there exist two possibilities to reduce the energy consumption. The first possibility represents a reduction of the vehicles. Therefore it is necessary to develop a ropeway which can change the number of vehicles during
…show more content…
Three strategies are shown. The first strategy is to vary only the number of vehicles. This leads to a energy consumption of 2885 kWh. The column in the middle shows the resulting velocities. For this operational strategy a lower limit of 3 m/s is used. A variation of the velocity results in a energy consumption of 2422 kWh. In the right column a variation of the number of vehicles in combination with a variation of the velocity is investigated. By varying both parameters the ropeway consumes 2379 kWh for this exemplary scenario. This represents a energy reduction of 665 kWh, respectively 21.8 \%. Currently a variation of the number of vehicles is not possible. Actual realizable is a variation of the velocity. This strategy leads to an energy reduction of 622 kWh per day. Assuming 120 operation days that are 74640 kWh. One the one side a reduction of the velocity reduces wear and on the other side the energy costs are reduced about 20.4