#*-------------------------------------------------------------------
* EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC.
*
* This LIBRARY is free software; you can distribute it and/or modify
* it under the therms of the ALSOC FREE LICENSE as available at
* http://www.enq.ufrgs.br/alsoc.
*
* EMSO Copyright (C) 2004 - 2007 ALSOC, original code
* from http://www.rps.eng.br Copyright (C) 2002-2004.
* All rights reserved.
*
* EMSO is distributed under the therms of the ALSOC LICENSE as
* available at http://www.enq.ufrgs.br/alsoc.
*----------------------------------------------------------------------
* Author: Gerson Balbueno Bicca 
* $Id: heater.mso 738 2009-02-27 04:26:23Z bicca $
*--------------------------------------------------------------------*#

using "streams";

Model heater

 ATTRIBUTES
	Pallete 	= true;
	Icon 		= "icon/heater";	
	Brief 	= "Heater";
	Info 		=
"Determines thermal and phase conditions of an outlet stream.

== Specify ==
* The Inlet stream
* Specify: 
**The outlet temperature and the outlet pressure or
** The outlet temperature and the inlet energy stream or
** The outlet pressure and the inlet energy stream
";

 PARAMETERS
	outer PP	as Plugin	(Brief="Physical Properties", Type="PP");
	outer NComp	as Integer 	(Brief="Number of Components");	
	Kvalues		as Switcher (Brief="Option for Display Phase Equilibrium K-values",Valid=["yes","no"], Default="yes");

 VARIABLES
	Duty    		as power		(Brief = "Actual Duty",Symbol="Q_{Duty}");
	Vfrac			as fraction 	(Brief = "Vapor fraction Outlet Stream",Symbol="V_{frac}");
	Lfrac			as fraction 	(Brief = "Liquid fraction Outlet Stream",Symbol="L_{frac}");
	Kvalue(NComp)	as Real		 	(Brief = "Phase Equilibrium K-values",Lower=1E-30,Upper=1E30,Symbol="K_{value}");
	Pratio 			as positive		(Brief = "Pressure Ratio", Symbol ="P_{ratio}");	
	Pdrop			as press_delta	(Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P");

in  Inlet 			as stream 		(Brief = "Inlet Stream", PosX=0, PosY=0.40, Symbol="^{in}");
out Outlet  		as streamPH		(Brief = "Outlet Stream", PosX=1, PosY=0.40, Symbol="^{out}");
in  Heat    		as power	(Brief ="Inlet Heat Stream", PosX=0.5, PosY=1, Symbol="_{out}");

 EQUATIONS

 "Flow"
	Outlet.F = Inlet.F;	

 for j in [1 : NComp] do
	
 "Composition"
	Outlet.F*Outlet.z(j) = Inlet.F*Inlet.z(j);	
	
 end

 "Vapor fraction Outlet Stream"
	Vfrac = Outlet.v;

 "Liquid fraction Outlet Stream"
	Lfrac = 1-Vfrac;

 "Heat Duty"
	Duty = Outlet.F*Outlet.h - Inlet.F*Inlet.h;

 "Pressure Drop"
	Outlet.P = Inlet.P - Pdrop;

 "Pressure Ratio"
	Outlet.P = Inlet.P * Pratio;
	
 switch Kvalues # Fix for better convergence !!!

	case "yes":
 "K-values Phase Equilibrium"
	Kvalue*Outlet.x = Outlet.y;

	case "no":
 "K-values Phase Equilibrium"
	Kvalue = 1;

 end

 "Duty Specification"
	Heat = Duty;

end

Model cooler

 ATTRIBUTES
	Pallete 	= true;
	Icon 		= "icon/cooler";	
	Brief 	= "Cooler";
	Info 		=
"Determines thermal and phase conditions of an outlet stream.

== Specify ==
* The Inlet stream
* Specify: 
**The outlet temperature and the outlet pressure or
** The outlet temperature and the inlet energy stream or
** The outlet pressure and the inlet energy stream
";

 PARAMETERS
	outer PP	as Plugin	(Brief="Physical Properties", Type="PP");
	outer NComp	as Integer 	(Brief="Number of Components");	
	Kvalues		as Switcher (Brief="Option for Display Phase Equilibrium K-values",Valid=["yes","no"], Default="yes");

 VARIABLES
	Duty    		as power		(Brief = "Actual Duty",Symbol="Q_{Duty}");
	Vfrac			as fraction 	(Brief = "Vapor fraction Outlet Stream",Symbol="V_{frac}");
	Lfrac			as fraction 	(Brief = "Liquid fraction Outlet Stream",Symbol="L_{frac}");
	Kvalue(NComp)	as Real		 	(Brief = "Phase Equilibrium K-values",Lower=1E-30,Upper=1E30,Symbol="K_{value}");
	Pratio 			as positive		(Brief = "Pressure Ratio", Symbol ="P_{ratio}");	
	Pdrop			as press_delta	(Brief = "Pressure Drop", DisplayUnit = 'kPa', Symbol ="\Delta P");

in  Inlet 			as stream 		(Brief = "Inlet Stream", PosX=0, PosY=0.615, Symbol="^{in}");
out Outlet  		as streamPH		(Brief = "Outlet Stream", PosX=1, PosY=0.615, Symbol="^{out}");
out  Heat    		as power	(Brief ="Inlet Heat Stream", PosX=0.5, PosY=0, Symbol="_{out}");

 EQUATIONS

 "Flow"
	Outlet.F = Inlet.F;	

 for j in [1 : NComp] do
	
 "Composition"
	Outlet.F*Outlet.z(j) = Inlet.F*Inlet.z(j);	
	
 end

 "Vapor fraction Outlet Stream"
	Vfrac = Outlet.v;

 "Liquid fraction Outlet Stream"
	Lfrac = 1-Vfrac;

 "Heat Duty"
	Duty = Outlet.F*Outlet.h - Inlet.F*Inlet.h;

 "Pressure Drop"
	Outlet.P = Inlet.P - Pdrop;

 "Pressure Ratio"
	Outlet.P = Inlet.P * Pratio;
	
 switch Kvalues # Fix for better convergence !!!

	case "yes":
 "K-values Phase Equilibrium"
	Kvalue*Outlet.x = Outlet.y;

	case "no":
 "K-values Phase Equilibrium"
	Kvalue = 1;

 end


 "Duty Specification"
	Heat = -Duty;

end