PhD Thesis - Energy Systems Research Unit - University of Strathclyde

instantaneous transport demand for each half hourly time step is read in to the
algorithm outlined in Figure 5.1. This then determines how much of that
demand can be met, and the new onboard tank level, and subtracts any fuel
necessary to refill the onboard tanks from the fuel available. If the transport
demand cannot be met due to a lack of fuel, the user is warned, and the amount
of demand that can be met with the available fuel is calculated. The total fuel
used is also calculated for information.
Before starting this algorithm, various parameters are calculated, depending on
which refuelling option has been chosen. These can be seen in Equations 5.5 to
5.10.
refill (to max if goes below) = Total Storage x Refill Percentage (5.5)
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min (always keep at if possible) = Total Storage x Min Percentage (5.6)
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tank (initial fuel level) = Total Storage x Initial Percentage (5.7)
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timesteps per day = 24 x timesteps per hour (5.8)
start time 1 = Time 1 selected x timesteps per hour (5.9)
start time 2 = Time 2 selected x timesteps per hour (5.10)
Total Fuel Used = 0
Then, for each timestep value, the following are defined,
fuel supply = available secondary fuel from matching stage at timestep value
i = this timestep value
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