.Buildings.Fluid.FixedResistances.BaseClasses.PlugFlowTransportDelay

Information

Calculates time delay at both sides of the pipe as the difference between the current simulation time and the inlet time of the fluid at both ends of the pipe.

Main equation

∂z(x,t)/∂t + v(t) ∂z(x,t)/∂x = 0,

where z(x,t) is the spatial distribution as a function of time of any property z of the fluid. For the inlet time propagation, z will be replaced by the inlet time of the fluid tin.

Implementation

The inlet time is approached as a fluid property and its propagation follows the one-dimensional wave equation, implemented using the spatialDistribution function. This components requires the mass flow through the pipe and the pipe dimensions in order to derive information about the fluid propagation.

The component calculates the delay time at the inlet and the outlet port of the pipe. For the forward flow, the time delay is exposed at the output tau, and for the backward flow, the time delay is exposed at the output tauRev.

Assumption

No axial mixing takes place in the pipe.

Revisions


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