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/* ASCEND modelling environment |
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Copyright (C) 2008 Carnegie Mellon University |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2, or (at your option) |
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any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*//** @file |
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Wrapper for FPROPS to allow access from ASCEND. |
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*/ |
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|
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//#define ASC_FPROPS_DEBUG |
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|
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/* include the external function API from libascend... */ |
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#include <ascend/compiler/extfunc.h> |
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|
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/* include error reporting API as well, so we can send messages to user */ |
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#include <ascend/utilities/error.h> |
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|
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/* for accessing the DATA instance */ |
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#include <ascend/compiler/child.h> |
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#include <ascend/general/list.h> |
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#include <ascend/compiler/module.h> |
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#include <ascend/compiler/childinfo.h> |
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#include <ascend/compiler/parentchild.h> |
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#include <ascend/compiler/slist.h> |
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#include <ascend/compiler/type_desc.h> |
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#include <ascend/compiler/packages.h> |
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#include <ascend/compiler/symtab.h> |
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#include <ascend/compiler/instquery.h> |
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#include <ascend/compiler/instmacro.h> |
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#include <ascend/compiler/instance_types.h> |
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|
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/* the code that we're wrapping... */ |
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#include "fprops.h" |
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#include "sat.h" |
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#include "solve_ph.h" |
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|
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/* for the moment, species data are defined in C code, we'll implement something |
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better later on, hopefully. */ |
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#include "fluids.h" |
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|
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#ifndef ASC_EXPORT |
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# error "Where is ASC_EXPORT?" |
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#endif |
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|
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|
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/*------------------------------------------------------------------------------ |
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FORWARD DECLARATIONS |
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*/ |
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|
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ExtBBoxInitFunc asc_fprops_prepare; |
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ExtBBoxFunc fprops_p_calc; |
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ExtBBoxFunc fprops_u_calc; |
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ExtBBoxFunc fprops_s_calc; |
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ExtBBoxFunc fprops_h_calc; |
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ExtBBoxFunc fprops_a_calc; |
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ExtBBoxFunc fprops_g_calc; |
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ExtBBoxFunc fprops_cp_calc; |
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ExtBBoxFunc fprops_cv_calc; |
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ExtBBoxFunc fprops_w_calc; |
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ExtBBoxFunc fprops_phsx_vT_calc; |
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ExtBBoxFunc fprops_Tvsx_ph_calc; |
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|
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#define TCRIT(FLUID) (FLUID->data->T_c) |
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#define TTRIP(FLUID) (FLUID->data->T_t) |
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#define RHOCRIT(FLUID) (FLUID->data->rho_c) |
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#define PCRIT(FLUID) (FLUID->data->p_c) |
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|
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/*------------------------------------------------------------------------------ |
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GLOBALS |
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*/ |
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|
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/* place to store symbols needed for accessing ASCEND's instance tree */ |
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static symchar *fprops_symbols[3]; |
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#define COMPONENT_SYM fprops_symbols[0] |
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#define TYPE_SYM fprops_symbols[1] |
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#define SOURCE_SYM fprops_symbols[2] |
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|
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static const char *fprops_p_help = "Calculate pressure from temperature and density, using FPROPS"; |
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static const char *fprops_u_help = "Calculate specific internal energy from temperature and density, using FPROPS"; |
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static const char *fprops_s_help = "Calculate specific entropy from temperature and density, using FPROPS"; |
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static const char *fprops_h_help = "Calculate specific enthalpy from temperature and density, using FPROPS"; |
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static const char *fprops_a_help = "Calculate specific Helmholtz energy from temperature and density, using FPROPS"; |
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static const char *fprops_g_help = "Calculate specific Gibbs energy from temperature and density, using FPROPS"; |
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static const char *fprops_cp_help = "Calculate isobaric specific heat from temperature and density, using FPROPS"; |
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static const char *fprops_cv_help = "Calculate isochoric specific heat from temperature and density, using FPROPS"; |
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static const char *fprops_w_help = "Calculate speed of sound from temperature and density, using FPROPS"; |
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|
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static const char *fprops_phsx_vT_help = "Calculate p, h, s, x from temperature and density, using FPROPS/Helmholtz eqn"; |
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|
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static const char *fprops_Tvsx_ph_help = "Calculate T, v, s, x from pressure and enthalpy, using FPROPS/Helmholtz eqn"; |
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|
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/*------------------------------------------------------------------------------ |
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REGISTRATION FUNCTION |
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*/ |
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|
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/** |
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This is the function called from "IMPORT fprops" |
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|
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It sets up the functions contained in this external library |
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*/ |
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extern |
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ASC_EXPORT int fprops_register(){ |
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int result = 0; |
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|
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ERROR_REPORTER_HERE(ASC_USER_WARNING,"FPROPS is still EXPERIMENTAL. Use with caution.\n"); |
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|
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#define CALCFN(NAME,INPUTS,OUTPUTS) \ |
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result += CreateUserFunctionBlackBox(#NAME \ |
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, asc_fprops_prepare \ |
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, NAME##_calc /* value */ \ |
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, (ExtBBoxFunc*)NULL /* derivatives not provided yet*/ \ |
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, (ExtBBoxFunc*)NULL /* hessian not provided yet */ \ |
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, (ExtBBoxFinalFunc*)NULL /* finalisation not implemented */ \ |
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, INPUTS,OUTPUTS /* inputs, outputs */ \ |
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, NAME##_help /* help text */ \ |
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, 0.0 \ |
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) /* returns 0 on success */ |
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|
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#define CALCFNDERIV(NAME,INPUTS,OUTPUTS) \ |
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result += CreateUserFunctionBlackBox(#NAME \ |
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, asc_fprops_prepare \ |
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, NAME##_calc /* value */ \ |
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, NAME##_calc /* derivatives */ \ |
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, (ExtBBoxFunc*)NULL /* hessian not provided yet */ \ |
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, (ExtBBoxFinalFunc*)NULL /* finalisation not implemented */ \ |
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, INPUTS,OUTPUTS /* inputs, outputs */ \ |
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, NAME##_help /* help text */ \ |
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, 0.0 \ |
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) /* returns 0 on success */ |
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|
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CALCFNDERIV(fprops_p,2,1); |
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CALCFN(fprops_u,2,1); |
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CALCFN(fprops_s,2,1); |
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CALCFN(fprops_h,2,1); |
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CALCFN(fprops_a,2,1); |
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CALCFN(fprops_g,2,1); |
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CALCFN(fprops_cp,2,1); |
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CALCFN(fprops_cv,2,1); |
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CALCFN(fprops_w,2,1); |
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CALCFN(fprops_phsx_vT,2,4); |
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CALCFN(fprops_Tvsx_ph,2,4); |
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|
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#undef CALCFN |
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|
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if(result){ |
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ERROR_REPORTER_HERE(ASC_PROG_NOTE,"CreateUserFunction result = %d\n",result); |
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} |
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return result; |
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} |
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|
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/** |
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'fprops_prepare' just gets the data member and checks that it's |
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valid, and stores it in the blackbox data field. |
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*/ |
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int asc_fprops_prepare(struct BBoxInterp *bbox, |
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struct Instance *data, |
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struct gl_list_t *arglist |
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){ |
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struct Instance *compinst, *typeinst, *srcinst; |
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const char *comp, *type = NULL, *src = NULL; |
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|
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fprops_symbols[0] = AddSymbol("component"); |
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fprops_symbols[1] = AddSymbol("type"); |
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fprops_symbols[2] = AddSymbol("source"); |
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|
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/* get the component name */ |
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compinst = ChildByChar(data,COMPONENT_SYM); |
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if(!compinst){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR |
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,"Couldn't locate 'component' in DATA, please check usage of FPROPS." |
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); |
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return 1; |
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} |
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if(InstanceKind(compinst)!=SYMBOL_CONSTANT_INST){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR,"DATA member 'component' must be a symbol_constant"); |
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return 1; |
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} |
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comp = SCP(SYMC_INST(compinst)->value); |
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if(comp==NULL || strlen(comp)==0){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR,"'component' is NULL or empty"); |
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return 1; |
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} |
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|
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/* get the component correlation type (FPROPS doesn't mind if none given) */ |
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typeinst = ChildByChar(data,TYPE_SYM); |
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if(typeinst){ |
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if(InstanceKind(typeinst)!=SYMBOL_CONSTANT_INST){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR,"DATA member 'type' must be a symbol_constant"); |
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return 1; |
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} |
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type = SCP(SYMC_INST(typeinst)->value); |
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//CONSOLE_DEBUG("TYPE: %s",type?type:"(null)"); |
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if(type && strlen(type)==0)type = NULL; |
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} |
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|
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/* get the source data string (FPROPS doesn't mind if none given) */ |
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srcinst = ChildByChar(data,SOURCE_SYM); |
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if(srcinst){ |
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if(InstanceKind(srcinst)!=SYMBOL_CONSTANT_INST){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR,"DATA member 'source' must be a symbol_constant"); |
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return 1; |
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} |
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src = SCP(SYMC_INST(srcinst)->value); |
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CONSOLE_DEBUG("SOURCE: %s",src?src:"(null)"); |
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if(src && strlen(src)==0)src = NULL; |
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} |
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|
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bbox->user_data = (void *)fprops_fluid(comp,type,src); |
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if(bbox->user_data == NULL){ |
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ERROR_REPORTER_HERE(ASC_USER_ERROR,"Component name/type was not recognised. Check the source-code for for the supported species."); |
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return 1; |
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} |
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|
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ERROR_REPORTER_HERE(ASC_PROG_NOTE,"Prepared component '%s'%s%s%s OK.\n" |
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,comp |
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,type?" type '":"" |
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,type?type:"" |
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,type?"'":"" |
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); |
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return 0; |
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} |
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|
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/*------------------------------------------------------------------------------ |
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EVALULATION ROUTINES |
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*/ |
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|
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#define CALCPREPARE(NIN,NOUT) \ |
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/* a few checks about the input requirements */ \ |
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if(ninputs != NIN)return -1; \ |
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if(noutputs != NOUT)return -2; \ |
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if(inputs==NULL)return -3; \ |
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if(outputs==NULL)return -4; \ |
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if(bbox==NULL)return -5; \ |
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\ |
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/* the 'user_data' in the black box object will contain the */\ |
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/* coefficients required for this fluid; cast it to the required form: */\ |
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const PureFluid *FLUID = (const PureFluid *)bbox->user_data;\ |
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FpropsError err=FPROPS_NO_ERROR; |
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|
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/** |
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Evaluation function for 'fprops_p'. |
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@param inputs array with values of inputs T and rho. |
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@param outputs array with just value of p |
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@param jacobian, the partial derivative df/dx, where |
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each row is df[i]/dx[j] over each j for the y_out[i] of |
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matching index. The jacobian array is 1-D, row major, i.e. |
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df[i]/dx[j] -> jacobian[i*ninputs+j]. |
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@return 0 on success |
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*/ |
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int fprops_p_calc(struct BBoxInterp *bbox, |
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int ninputs, int noutputs, |
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double *inputs, double *outputs, |
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double *jacobian |
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){ |
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CALCPREPARE(2,1); |
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|
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/* first input is temperature, second is density */ |
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if(bbox->task == bb_func_eval){ |
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FluidState S = fprops_set_Trho(inputs[0],inputs[1], FLUID, &err); |
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outputs[0] = fprops_p(S, &err); |
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}else{ |
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//ERROR_REPORTER_HERE(ASC_USER_NOTE,"JACOBIAN CALCULATION FOR P!\n"); |
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FluidState S = fprops_set_Trho(inputs[0],inputs[1], FLUID, &err); |
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jacobian[0*1+0] = fprops_dpdT_rho(S, &err); |
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jacobian[0*1+1] = fprops_dpdrho_T(S, &err); |
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} |
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|
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/* no need to worry about error states etc. */ |
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return 0; |
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} |
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|
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|
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/** |
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Evaluation function for 'fprops_u' |
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@param jacobian ignored |
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@return 0 on success |
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*/ |
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int fprops_u_calc(struct BBoxInterp *bbox, |
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int ninputs, int noutputs, |
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double *inputs, double *outputs, |
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double *jacobian |
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){ |
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CALCPREPARE(2,1); |
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FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
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|
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/* first input is temperature, second is density */ |
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if(bbox->task == bb_func_eval){ |
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outputs[0] = fprops_u(S, &err); |
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}else{ |
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jacobian[0*1+0] = fprops_dudT_rho(S, &err); |
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jacobian[0*1+1] = fprops_dudrho_T(S, &err); |
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} |
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|
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/* no need to worry about error states etc. */ |
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return 0; |
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} |
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|
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|
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/** |
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Evaluation function for 'fprops_s' |
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@param jacobian ignored |
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@return 0 on success |
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*/ |
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int fprops_s_calc(struct BBoxInterp *bbox, |
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int ninputs, int noutputs, |
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double *inputs, double *outputs, |
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double *jacobian |
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){ |
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CALCPREPARE(2,1); |
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FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
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|
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/* first input is temperature, second is density */ |
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outputs[0] = fprops_s(S, &err); |
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|
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/* no need to worry about error states etc. */ |
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return 0; |
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} |
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|
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|
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/** |
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Evaluation function for 'fprops_h' |
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@param jacobian ignored |
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@return 0 on success |
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*/ |
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int fprops_h_calc(struct BBoxInterp *bbox, |
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int ninputs, int noutputs, |
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double *inputs, double *outputs, |
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double *jacobian |
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){ |
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CALCPREPARE(2,1); |
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FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 342 |
|
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/* first input is temperature, second is density */ |
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if(bbox->task == bb_func_eval){ |
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outputs[0] = fprops_h(S, &err); |
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}else{ |
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//ERROR_REPORTER_HERE(ASC_USER_NOTE,"JACOBIAN CALCULATION FOR P!\n"); |
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jacobian[0*1+0] = fprops_dhdT_rho(S, &err); |
| 349 |
jacobian[0*1+1] = fprops_dhdrho_T(S, &err); |
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} |
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|
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/* no need to worry about error states etc. */ |
| 353 |
return 0; |
| 354 |
} |
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|
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|
| 357 |
/** |
| 358 |
Evaluation function for 'fprops_a' |
| 359 |
@param jacobian ignored |
| 360 |
@return 0 on success |
| 361 |
*/ |
| 362 |
int fprops_a_calc(struct BBoxInterp *bbox, |
| 363 |
int ninputs, int noutputs, |
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double *inputs, double *outputs, |
| 365 |
double *jacobian |
| 366 |
){ |
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CALCPREPARE(2,1); |
| 368 |
FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 369 |
|
| 370 |
/* first input is temperature, second is density */ |
| 371 |
outputs[0] = fprops_a(S, &err); |
| 372 |
|
| 373 |
/* no need to worry about error states etc. */ |
| 374 |
return 0; |
| 375 |
} |
| 376 |
|
| 377 |
|
| 378 |
/** |
| 379 |
Evaluation function for 'fprops_g' |
| 380 |
@param jacobian ignored |
| 381 |
@return 0 on success |
| 382 |
*/ |
| 383 |
int fprops_g_calc(struct BBoxInterp *bbox, |
| 384 |
int ninputs, int noutputs, |
| 385 |
double *inputs, double *outputs, |
| 386 |
double *jacobian |
| 387 |
){ |
| 388 |
CALCPREPARE(2,1); |
| 389 |
FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 390 |
|
| 391 |
/* first input is temperature, second is density */ |
| 392 |
outputs[0] = fprops_g(S, &err); |
| 393 |
|
| 394 |
/* no need to worry about error states etc. */ |
| 395 |
return 0; |
| 396 |
} |
| 397 |
|
| 398 |
|
| 399 |
/** |
| 400 |
Evaluation function for 'fprops_cp' |
| 401 |
@param jacobian ignored |
| 402 |
@return 0 on success |
| 403 |
*/ |
| 404 |
int fprops_cp_calc(struct BBoxInterp *bbox, |
| 405 |
int ninputs, int noutputs, |
| 406 |
double *inputs, double *outputs, |
| 407 |
double *jacobian |
| 408 |
){ |
| 409 |
CALCPREPARE(2,1); |
| 410 |
FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 411 |
|
| 412 |
/* first input is temperature, second is density */ |
| 413 |
outputs[0] = fprops_cp(S, &err); |
| 414 |
|
| 415 |
/* no need to worry about error states etc. */ |
| 416 |
return 0; |
| 417 |
} |
| 418 |
|
| 419 |
|
| 420 |
/** |
| 421 |
Evaluation function for 'fprops_cv' |
| 422 |
@param jacobian ignored |
| 423 |
@return 0 on success |
| 424 |
*/ |
| 425 |
int fprops_cv_calc(struct BBoxInterp *bbox, |
| 426 |
int ninputs, int noutputs, |
| 427 |
double *inputs, double *outputs, |
| 428 |
double *jacobian |
| 429 |
){ |
| 430 |
CALCPREPARE(2,1); |
| 431 |
FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 432 |
|
| 433 |
/* first input is temperature, second is density */ |
| 434 |
outputs[0] = fprops_cv(S, &err); |
| 435 |
|
| 436 |
/* no need to worry about error states etc. */ |
| 437 |
return 0; |
| 438 |
} |
| 439 |
|
| 440 |
|
| 441 |
/** |
| 442 |
Evaluation function for 'fprops_w' |
| 443 |
@param jacobian ignored |
| 444 |
@return 0 on success |
| 445 |
*/ |
| 446 |
int fprops_w_calc(struct BBoxInterp *bbox, |
| 447 |
int ninputs, int noutputs, |
| 448 |
double *inputs, double *outputs, |
| 449 |
double *jacobian |
| 450 |
){ |
| 451 |
CALCPREPARE(2,1); |
| 452 |
FluidState S = fprops_set_Trho(inputs[0], inputs[1], FLUID, &err); |
| 453 |
|
| 454 |
/* first input is temperature, second is density */ |
| 455 |
outputs[0] = fprops_w(S, &err); |
| 456 |
|
| 457 |
/* no need to worry about error states etc. */ |
| 458 |
return 0; |
| 459 |
} |
| 460 |
|
| 461 |
|
| 462 |
/** |
| 463 |
Evaluation function for 'fprops_phsx_vT' |
| 464 |
@return 0 on success |
| 465 |
*/ |
| 466 |
int fprops_phsx_vT_calc(struct BBoxInterp *bbox, |
| 467 |
int ninputs, int noutputs, |
| 468 |
double *inputs, double *outputs, |
| 469 |
double *jacobian |
| 470 |
){ |
| 471 |
CALCPREPARE(2,4); |
| 472 |
|
| 473 |
double rho = 1./inputs[0]; |
| 474 |
double T = inputs[1]; |
| 475 |
double p_sat, rho_f, rho_g; |
| 476 |
|
| 477 |
if(T < TCRIT(FLUID)){ |
| 478 |
fprops_sat_T(T, &p_sat, &rho_f, &rho_g, FLUID, &err); |
| 479 |
|
| 480 |
if(rho < rho_f && rho > rho_g){ |
| 481 |
/* saturated */ |
| 482 |
double vf = 1./rho_f; |
| 483 |
double vg = 1./rho_g; |
| 484 |
double x = (inputs[0] - vf) /(vg - vf); |
| 485 |
FluidState Sf = fprops_set_Trho(T, rho_f, FLUID, &err); |
| 486 |
double sf = fprops_s(Sf, &err); |
| 487 |
double hf = fprops_h(Sf, &err); |
| 488 |
FluidState Sg = fprops_set_Trho(T, rho_g, FLUID, &err); |
| 489 |
double sg = fprops_s(Sg, &err); |
| 490 |
double hg = fprops_h(Sg, &err); |
| 491 |
outputs[0] = p_sat; |
| 492 |
outputs[1] = hf + x * (hg-hf); |
| 493 |
outputs[2] = sf + x * (sg-sf); |
| 494 |
outputs[3] = x; |
| 495 |
/* maybe there was an error solving the saturation state? */ |
| 496 |
return err; |
| 497 |
} |
| 498 |
} |
| 499 |
|
| 500 |
/* non-saturated */ |
| 501 |
FluidState S = fprops_set_Trho(T, rho, FLUID, &err); |
| 502 |
outputs[0] = fprops_p(S, &err); |
| 503 |
outputs[1] = fprops_h(S, &err); |
| 504 |
outputs[2] = fprops_s(S, &err); |
| 505 |
outputs[3] = rho < RHOCRIT(FLUID) ? 1 : 0; |
| 506 |
return 0; |
| 507 |
} |
| 508 |
|
| 509 |
|
| 510 |
/** |
| 511 |
Evaluation function for 'fprops_Tvsx_ph' |
| 512 |
@return 0 on success |
| 513 |
*/ |
| 514 |
int fprops_Tvsx_ph_calc(struct BBoxInterp *bbox, |
| 515 |
int ninputs, int noutputs, |
| 516 |
double *inputs, double *outputs, |
| 517 |
double *jacobian |
| 518 |
){ |
| 519 |
CALCPREPARE(2,4); |
| 520 |
|
| 521 |
static const PureFluid *last = NULL; |
| 522 |
static double p,h,T,v,s,x; |
| 523 |
if(last == FLUID && p == inputs[0] && h == inputs[1]){ |
| 524 |
outputs[0] = T; |
| 525 |
outputs[1] = v; |
| 526 |
outputs[2] = s; |
| 527 |
outputs[3] = x; |
| 528 |
return 0; |
| 529 |
} |
| 530 |
|
| 531 |
p = inputs[0]; |
| 532 |
h = inputs[1]; |
| 533 |
|
| 534 |
double hft, pt, rhoft,rhogt; |
| 535 |
fprops_triple_point(&pt,&rhoft,&rhogt,FLUID,&err); |
| 536 |
if(err){ |
| 537 |
ERROR_REPORTER_HERE(ASC_PROG_ERR,"Failed to solve triple point for %s.",FLUID->name); |
| 538 |
return 5; |
| 539 |
} |
| 540 |
FluidState Sft = fprops_set_Trho(TTRIP(FLUID),rhoft,FLUID,&err); |
| 541 |
hft = fprops_h(Sft, &err); |
| 542 |
if(h < hft){ |
| 543 |
ERROR_REPORTER_HERE(ASC_PROG_ERR |
| 544 |
,"Input enthalpy %f kJ/kg is below triple point liquid enthalpy %f kJ/kg" |
| 545 |
,h/1e3,hft/1e3 |
| 546 |
); |
| 547 |
return 6; |
| 548 |
} |
| 549 |
|
| 550 |
if(p < pt){ |
| 551 |
ERROR_REPORTER_HERE(ASC_PROG_ERR |
| 552 |
,"Input pressure %f bar is below triple point pressure %f bar" |
| 553 |
,p/1e5,pt/1e5 |
| 554 |
); |
| 555 |
outputs[0] = TTRIP(FLUID); |
| 556 |
outputs[1] = 1./ rhoft; |
| 557 |
outputs[2] = FLUID->s_fn(TTRIP(FLUID), rhoft, FLUID->data, &err); |
| 558 |
outputs[3] = 0; |
| 559 |
return 7; |
| 560 |
} |
| 561 |
|
| 562 |
if(p < PCRIT(FLUID)){ |
| 563 |
double T_sat, rho_f, rho_g; |
| 564 |
|
| 565 |
fprops_sat_p(p, &T_sat, &rho_f, &rho_g, FLUID, &err); |
| 566 |
if(err){ |
| 567 |
ERROR_REPORTER_HERE(ASC_PROG_ERR |
| 568 |
, "Failed to solve saturation state of %s for p = %f bar < pc (= %f bar)" |
| 569 |
, FLUID->name, p/1e5,PCRIT(FLUID)/1e5 |
| 570 |
); |
| 571 |
outputs[0] = TTRIP(FLUID); |
| 572 |
outputs[1] = 1./rhoft; |
| 573 |
outputs[2] = FLUID->s_fn(TTRIP(FLUID), rhoft, FLUID->data, &err); |
| 574 |
outputs[3] = 0; |
| 575 |
return 8; |
| 576 |
} |
| 577 |
|
| 578 |
FluidState Sf = fprops_set_Trho(T_sat,rho_f,FLUID,&err); |
| 579 |
FluidState Sg = fprops_set_Trho(T_sat,rho_g,FLUID,&err); |
| 580 |
double hf = fprops_h(Sf, &err); |
| 581 |
double hg = fprops_h(Sg, &err); |
| 582 |
|
| 583 |
if(hf < h && h < hg){ |
| 584 |
/* saturated */ |
| 585 |
double vf = 1./rho_f; |
| 586 |
double vg = 1./rho_g; |
| 587 |
double sf = fprops_s(Sf, &err); |
| 588 |
double sg = fprops_s(Sg, &err); |
| 589 |
T = T_sat; |
| 590 |
x = (h - hf) /(hg - hf); |
| 591 |
v = vf + x * (vg-vf); |
| 592 |
s = sf + x * (sg-sf); |
| 593 |
last = FLUID; |
| 594 |
outputs[0] = T; |
| 595 |
outputs[1] = v; |
| 596 |
outputs[2] = s; |
| 597 |
outputs[3] = x; |
| 598 |
#ifdef ASC_FPROPS_DEBUG |
| 599 |
ERROR_REPORTER_HERE(ASC_PROG_NOTE,"Saturated state, p=%f bar, h = %f kJ/kg",p/1e5,h/1e3); |
| 600 |
#endif |
| 601 |
return 0; |
| 602 |
} |
| 603 |
} |
| 604 |
|
| 605 |
double rho; |
| 606 |
fprops_solve_ph(p,h, &T, &rho, 0, FLUID, &err); |
| 607 |
if(err){ |
| 608 |
ERROR_REPORTER_HERE(ASC_PROG_ERR,"Failed to solve for (p,h): %s",fprops_error(err)); |
| 609 |
return 9; |
| 610 |
} |
| 611 |
/* non-saturated */ |
| 612 |
v = 1./rho; |
| 613 |
FluidState S = fprops_set_Trho(T,rho,FLUID,&err); |
| 614 |
s = fprops_s(S, &err); |
| 615 |
x = (v > 1./RHOCRIT(FLUID)) ? 1 : 0; |
| 616 |
last = FLUID; |
| 617 |
outputs[0] = T; |
| 618 |
outputs[1] = v; |
| 619 |
outputs[2] = s; |
| 620 |
outputs[3] = x; |
| 621 |
#ifdef ASC_FPROPS_DEBUG |
| 622 |
ERROR_REPORTER_HERE(ASC_PROG_NOTE,"Non-saturated state, p = %f bar, h = %f kJ/kg",p/1e5,h/1e3); |
| 623 |
#endif |
| 624 |
return 0; |
| 625 |
} |
| 626 |
|
| 627 |
|
| 628 |
|
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