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Index: mttroot/mtt/lib/examples/Thermal/Incompressible/Incompressible-Systems/ShowerHeater/ShowerHeater_desc.tex
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+% -*-latex-*- used to set EMACS into LaTeX-mode
+% Verbal description for system ShowerHeater (ShowerHeater_desc.tex)
+% Generated by MTT on Tue Jan 13 18:01:55 GMT 1998.
+
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% Version control history
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% $Id$
+% %% $Log$
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+   The acausal bond graph of system \textbf{ShowerHeater} is
+   displayed in Figure \Ref{ShowerHeater_abg} and its label
+   file is listed in Section \Ref{sec:ShowerHeater_lbl}.
+   The subsystems are listed in Section \Ref{sec:ShowerHeater_sub}.
+
+\textbf{ShowerHeater} is a very elementary model of an electric heater suitable for
+a shower. It illustates the use of bond graph components which are
+internally pseudo, but externally true bond graphs
+(temperature/entropy flow).
+
+There are three main components:
+\begin{enumerate}
+\item p1 and p2 -- a \textbf{Pipe} component (see Section
+  \Ref{sec:Pipe}). It is assumed that the pipes have zero flow
+  resistance and thus do not generate heat via flow resistance.
+\item t1 -- a tank \textbf{Tank} component. 
+\item Heater -- a resistive heater modelled by the thermodynamic
+  \textbf{R} component \textbf{RS}.
+\end{enumerate}
+Other components could be added to represent thermal conduction and
+thermal capacities.
+
+The components \textbf{In} and \textbf{Out} provide the inlet and
+outlet conditions.
+
+The three inputs are
+\begin{description}
+\item[$u_1$] The flow rate
+\item[$u_2$] The inlet temperature
+\item[$u_3$] The voltage across the heating element.
+\end{description}
+The single output is
+\begin{description}
+\item[$y_1$] The outflow temperature
+\end{description}
+and the state is 
+\begin{description}
+\item[$x_1$] The heat contained in the tank.
+\end{description}
+
+%%% Local Variables: 
+%%% mode: latex
+%%% TeX-master: t
+%%% End: