Overview
Comment: | Updated figure references |
---|---|
Downloads: | Tarball | ZIP archive | SQL archive |
Timelines: | family | ancestors | descendants | both | origin/master | trunk |
Files: | files | file ages | folders |
SHA3-256: |
9a940c801a2c1cff3a020fca185f13c6 |
User & Date: | gawthrop@users.sourceforge.net on 2000-12-01 18:00:59 |
Other Links: | branch diff | manifest | tags |
Context
2000-12-01
| ||
18:11:13 | Changed tmp name to mtt_tmp check-in: 66058f2870 user: gawthrop@users.sourceforge.net tags: origin/master, trunk | |
18:00:59 | Updated figure references check-in: 9a940c801a user: gawthrop@users.sourceforge.net tags: origin/master, trunk | |
17:59:01 | Added .PRECIOUS: %.cc to hang on to cc files - thanks Geraint check-in: f6c1376c46 user: gawthrop@users.sourceforge.net tags: origin/master, trunk | |
Changes
Modified mttroot/mtt/lib/examples/Thermal/GasTurbines/SimpleGasTurbine/SimpleGasTurbine_desc.tex from [56aea3a46c] to [3351a658e2].
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | % -*-latex-*- used to set EMACS into LaTeX-mode % Verbal description for system SimpleGasTurbine (SimpleGasTurbine_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{SimpleGasTurbine} is displayed in Figure \Ref{SimpleGasTurbine_abg} and its label file is listed in Section \Ref{sec:SimpleGasTurbine_lbl}. The subsystems are listed in Section \Ref{sec:SimpleGasTurbine_sub}. \textbf{SimpleGasTurbine} can be regarded as an single-spool gas turbine (producing shaft power) with an ideal-gas working fluid. It corresponds to the simple Joule Cycle as described in Chapter 12 of Rogers and Mayhew and in Chapter 2 of Cohen, Rogers and Saravanamutto. However, unlike those examples, the system is written with dynamics in mind. | > > > | | | | | < | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | % -*-latex-*- used to set EMACS into LaTeX-mode % Verbal description for system SimpleGasTurbine (SimpleGasTurbine_desc.tex) % Generated by MTT on Tue Jan 13 18:01:55 GMT 1998. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % %% Version control history % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % %% $Id$ % %% $Log$ % %% Revision 1.1 1998/05/18 15:45:50 peterg % %% Initial revision % %% % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% The acausal bond graph of system \textbf{SimpleGasTurbine} is displayed in Figure \Ref{SimpleGasTurbine_abg} and its label file is listed in Section \Ref{sec:SimpleGasTurbine_lbl}. The subsystems are listed in Section \Ref{sec:SimpleGasTurbine_sub}. \textbf{SimpleGasTurbine} can be regarded as an single-spool gas turbine (producing shaft power) with an ideal-gas working fluid. It corresponds to the simple Joule Cycle as described in Chapter 12 of Rogers and Mayhew and in Chapter 2 of Cohen, Rogers and Saravanamutto. However, unlike those examples, the system is written with dynamics in mind. The system is described using an energy Bond Graph- this ensures that the first law is observed. In particular transformers are used to explicitly convert between energy covariables. Although this is a simple model, I believe that it provides the basis for building complex thermodynamic systems involving gas power cycles. There are five main components: \begin{enumerate} \item p1 -- a \textbf{Pump} component representing the compressor stage. This converts shaft work to energy flow in the working fluid. \item c1 -- a \textbf{Comb} component representing the combustion |
︙ | ︙ | |||
61 62 63 64 65 66 67 | Both heat input and work output are measured using the \textbf{PS} (power sensor) component, that for work output is embedded in the \textbf{Load} component. These can be monitored to give the efficiency of the \textbf{SimpleGasTurbine}. A symbolic steady-state for the model was computed -- see Section | | | | | | | 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | Both heat input and work output are measured using the \textbf{PS} (power sensor) component, that for work output is embedded in the \textbf{Load} component. These can be monitored to give the efficiency of the \textbf{SimpleGasTurbine}. A symbolic steady-state for the model was computed -- see Section \ref{sec:SimpleGasTurbine_ss.tex}. In particular, the load resistance was chosen to absorb all the generated work at the steady state and the shaft inertia was chosen to give a unit time constant for the linearised system. The mass flow and shaft speeds were taken as unity. For the purposed of simulation, the numerical values given in Examples 12.1 of Chapter 12 of Rogers and Mayhew, except that the isentropic efficiencies are 100\% ($n=\gamma$) -- see Section \ref{sec:SimpleGasTurbine_numpar.tex}. Simulations were performed starting at the steady state and increasing the combustion chamber temperature by 10\% at $t=1$ and reducing by 10\% at $t=5$. Graphs of the various outputs are plotted: \begin{itemize} \item Figure \Ref{fig:SimpleGasTurbine_odeso-SimpleGasTurbine-comp-1-T,SimpleGasTurbine-c1-1-T,SimpleGasTurbine-turb-1-T.ps} -- the temperatures at the output of the \begin{itemize} \item compressor, \item combustion chamber and \item turbine \end{itemize} \item Figure \Ref{fig:SimpleGasTurbine_odeso-SimpleGasTurbine-fuel-1-Heat-1-y,SimpleGasTurbine-load-1-Work-1-y.ps} -- the heat input and work output \item Figure \Ref{fig:SimpleGasTurbine_odeso-SimpleGasTurbine-shaft-1-speed-1-y.ps} -- the shaft speed and \item Figure \Ref{fig:SimpleGasTurbine_odeso-SimpleGasTurbine-c1-1-P.ps} -- the pressure at the output of the \begin{itemize} \item compressor, \item combustion chamber and \item turbine \end{itemize} \end{itemize} |
︙ | ︙ |