#*---------------------------------------------------------------------
* This file is property of the author and cannot be used, copyed
* or modified without permission.
*
* Copyright (C) 2002-2004  the author
*----------------------------------------------------------------------
* Author: Rafael de Pelegrini Soares
* $Id: ThreeTank1.mso 843 2009-09-03 18:36:47Z bicca $
*----------------------------------------------------------------------
*
* Arquivo de exemplo do EMSO
*
*-------------------------------------------------------------------*#

Model tank_simplified

PARAMETERS
	pi  as Real (Brief="pi number",Default=3.141592);
	k 	as Real (Brief="Valve Constant", Unit = 'm^2.5/h', Default=4);
	Dh  as Real	(Brief="Hydraulic diameter", Unit = 'm', Default=2);
	A 	as Real (Brief="Tank area", Unit = 'm^2');

SET
	pi  = 3.141592;
	A   = (pi*Dh^2)/4;

VARIABLES
	V 		as Real	(Brief="Tank Volume", Lower = 0, Unit='m^3');
	Level 	as Real	(Brief="Tank level", Lower = 0, Unit='m');
in	Fin  	as Real	(Brief="Input flow", Lower = 0, Unit='m^3/h');
out	Fout 	as Real	(Brief="Output flow",Lower = 0, Unit='m^3/h');

EQUATIONS

"Mass balance"
	diff(V) = Fin - Fout;

"Valve equation"
	Fout = k*sqrt(Level);

"Tank volume"
	V = A*Level;

end

FlowSheet ThreeTank

DEVICES
	Feed    as Real (Brief="Feed Stream", Unit='m^3/h');
	
	Tank1	as tank_simplified (Brief="First Tank");
	Tank2	as tank_simplified (Brief="Second Tank");
	Tank3	as tank_simplified (Brief="Third Tank");

CONNECTIONS
	Feed        to  Tank1.Fin;
	Tank1.Fout	to	Tank2.Fin;
	Tank2.Fout	to	Tank3.Fin;

end