hPipe

Figure 1.13: System hPipe: acausal bond graph

The acausal bond graph of system hPipe is displayed in Figure 1.13 (on page ) and its label file is listed in Section 1.1.14 (on page ). The subsystems are listed in Section 1.1.14 (on page ).

hPipe represents an ideal (energy conserving) pipe carrying a fluid with heat transfer. To ensure energy conservation, power bonds are used and connected by (energy conserving) TF components. It is assumed that the working fluid is an ideal gas (gas constant $r$) and that a mass $m_t$ is stored within pipe with a volume $v_t$.

The central 0 junction carries temperature ($T$) and the two hydraulic ports are connected to this by appropriate transformers. The modulus of the TF component labeled ``P2T'' is such P and T are related by the ideal gas law

$$P = \frac{Rm_t}{v_t} T$$ (1.4)