ADDED   mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Pump/Pump_desc.tex
Index: mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Pump/Pump_desc.tex
==================================================================
--- /dev/null
+++ mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Pump/Pump_desc.tex
@@ -0,0 +1,43 @@
+% -*-latex-*- Put EMACS into LaTeX-mode
+% Verbal description for system Pump (Pump_desc.tex)
+% Generated by MTT on Fri Mar 20 15:53:12 GMT 1998.
+
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% Version control history
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% $Id$
+% %% $Log$
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+   The acausal bond graph of system \textbf{Pump} is
+   displayed in Figure \Ref{Pump_abg} and its label
+   file is listed in Section \Ref{sec:Pump_lbl}.
+   The subsystems are listed in Section \Ref{sec:Pump_sub}.
+
+\textbf{Pump} represents an ideal pumping component for compressible
+or incompressible flow though a pipe. 
+
+The pump is ideal in the sense that the mass flow rate $\dot m$
+depends only on the shaft speed $\omega$:
+\begin{equation}
+  \dot m = k_p \omega
+\end{equation}
+
+It is implemented using three components:
+\begin{itemize}
+\item the ideal isentropic \textbf{wPipe} component which gives the
+  correct energy flows
+\item the polytropic expansion \textbf{Poly} component which imposes
+  the correct temperature at the output of the pump. This component
+  imposes zero flow at all its ports and therefore does not affect
+  energy balance. It has a bicausal output imposing both the
+  temperature measured by the \textbf{SS} component ``T'' and a zero
+  flow.
+\item the \emph{effort-bicausal transformer} \textbf{EBTF}
+  component. This component is an energy-conserving \textbf{TF}
+  component with non-standard causality. The modulus is determined by
+  the two imposed efforts ($T$ and $T_2$), and this modulus determines
+  the flows in the usual way. In particular, it makes sure that the
+  internal energy flowing from the pump to the following components
+  (imposing $T_2$) is correct.
+\end{itemize}

ADDED   mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Turb/Turb_desc.tex
Index: mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Turb/Turb_desc.tex
==================================================================
--- /dev/null
+++ mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Turb/Turb_desc.tex
@@ -0,0 +1,21 @@
+% -*-latex-*- Put EMACS into LaTeX-mode
+% Verbal description for system Turb (Turb_desc.tex)
+% Generated by MTT on Fri Mar 20 15:53:12 GMT 1998.
+
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% Version control history
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %% $Id$
+% %% $Log$
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+   The acausal bond graph of system \textbf{Turb} is
+   displayed in Figure \Ref{Turb_abg} and its label
+   file is listed in Section \Ref{sec:Turb_lbl}.
+   The subsystems are listed in Section \Ref{sec:Turb_sub}.
+
+\textbf{Turb} represents an ideal turbine component for compressible
+or incompressible flow though a pipe.
+
+It is identical to the \textbf{Pump} component (which has a more
+complete description) exept for the direction of work flow.