There are three types of fire flow simulation available:
- Fire flow
availability runs calculate the potential fire flow availability from
local nodal pressure (calculated as in a normal run) and assumed hydrant
characteristics. Fire flow is not applied to the network, therefore the
effect of increased flows on the network is not taken into account.
Use the hydrant testing or forced
fire flow run types for more accurate modelling of the impact of
fire flow on the network.
- Hydrant
testing runs allow automated testing of a selection of nodes to determine
whether a required minimum fire flow can be supplied without breaching
pressure constraints.
The hydrant testing simulation is performed as a series of steady
state analyses. Each node is considered independently, as if no other
hydrant in the system is open.
- Forced fire flow runs allow automated testing of a selection of flows at
a single fire flow target point. Each flow is tested in turn against user
defined constraints such as minimum allowable network pressure. The forced
fire flow simulation is performed as a series of snapshot simulations.