Hello, everyone!
Today, I would like to continue and share with you about the techno-economic model - geometric model assumptions.
The definition of the geometric model is required to calculate the length of trenches, ducts and cables.
Some of the construction techniques are aerial, using string along utility poles (mostly rural areas); trench, digging up earth and then lay a new conduit and fiber (used in urban areas); and pull-through, running through existing underground conduits.
Since each technology has different characteristics, the model assumes different assumptions for the several access technologies.
Table 1. Geometric model for Feeder networks
Table 2. Geometric model for Distribution networks
Here we consider that trench length represents the civil work required for digging and ducting - the model does not make distinction between aerial (overhead poles) and buried (underground ducts).
However, the costs are more significant where infrastructure must be buried than where it can be installed on existing poles (usually, aerial installation is almost twice as inexpensive as when the infrastructure is buried).
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