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csp_solver_pc_Rankine_indirect_224.cpp
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csp_solver_pc_Rankine_indirect_224.cpp
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/**
BSD-3-Clause
Copyright 2019 Alliance for Sustainable Energy, LLC
Redistribution and use in source and binary forms, with or without modification, are permitted provided
that the following conditions are met :
1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse
or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDER, CONTRIBUTORS, UNITED STATES GOVERNMENT OR UNITED STATES
DEPARTMENT OF ENERGY, NOR ANY OF THEIR EMPLOYEES, BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "csp_solver_pc_Rankine_indirect_224.h"
#include "csp_solver_util.h"
#include "lib_physics.h"
#include "water_properties.h"
#include "lib_util.h"
#include "sam_csp_util.h"
#include <algorithm>
#include <set>
#include <fstream>
static C_csp_reported_outputs::S_output_info S_output_info[] =
{
{C_pc_Rankine_indirect_224::E_ETA_THERMAL, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_Q_DOT_HTF, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_M_DOT_HTF, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_Q_DOT_STARTUP, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_W_DOT, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_T_HTF_IN, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_T_HTF_OUT, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{ C_pc_Rankine_indirect_224::E_T_COND_OUT, C_csp_reported_outputs::TS_WEIGHTED_AVE },
{ C_pc_Rankine_indirect_224::E_T_COLD, C_csp_reported_outputs::TS_WEIGHTED_AVE },
{ C_pc_Rankine_indirect_224::E_M_COLD, C_csp_reported_outputs::TS_LAST },
{ C_pc_Rankine_indirect_224::E_M_WARM, C_csp_reported_outputs::TS_LAST },
{ C_pc_Rankine_indirect_224::E_T_WARM,C_csp_reported_outputs::TS_WEIGHTED_AVE },
{ C_pc_Rankine_indirect_224::E_T_RADOUT,C_csp_reported_outputs::TS_WEIGHTED_AVE },
{C_pc_Rankine_indirect_224::E_M_DOT_WATER, C_csp_reported_outputs::TS_WEIGHTED_AVE},
{C_pc_Rankine_indirect_224::E_P_COND,C_csp_reported_outputs::TS_LAST },
{ C_pc_Rankine_indirect_224::E_RADCOOL_CNTRL,C_csp_reported_outputs::TS_WEIGHTED_AVE },
{C_pc_Rankine_indirect_224::E_M_DOT_HTF_REF, C_csp_reported_outputs::TS_WEIGHTED_AVE},
csp_info_invalid
};
C_pc_Rankine_indirect_224::C_pc_Rankine_indirect_224()
{
m_is_initialized = false;
m_standby_control_prev = m_standby_control_calc = -1;
m_F_wcMax = m_F_wcMin = m_delta_h_steam = m_startup_energy_required = m_eta_adj =
m_m_dot_design = m_q_dot_design = m_cp_htf_design =
m_startup_time_remain_prev = m_startup_time_remain_calc =
m_startup_energy_remain_prev = m_startup_energy_remain_calc = std::numeric_limits<double>::quiet_NaN();
m_ncall = -1;
mc_reported_outputs.construct(S_output_info);
}
void C_pc_Rankine_indirect_224::init(C_csp_power_cycle::S_solved_params &solved_params)
{
// Declare instance of fluid class for FIELD fluid
if( ms_params.m_pc_fl != HTFProperties::User_defined && ms_params.m_pc_fl < HTFProperties::End_Library_Fluids )
{
if( !mc_pc_htfProps.SetFluid(ms_params.m_pc_fl) )
{
throw(C_csp_exception("Power cycle HTF code is not recognized", "Rankine Indirect Power Cycle Initialization"));
}
}
else if( ms_params.m_pc_fl == HTFProperties::User_defined )
{
// Check that 'm_field_fl_props' is allocated and correct dimensions
int n_rows = (int)ms_params.m_pc_fl_props.nrows();
int n_cols = (int)ms_params.m_pc_fl_props.ncols();
if( n_rows > 2 && n_cols == 7 )
{
if( !mc_pc_htfProps.SetUserDefinedFluid(ms_params.m_pc_fl_props) )
{
m_error_msg = util::format(mc_pc_htfProps.UserFluidErrMessage(), n_rows, n_cols);
throw(C_csp_exception(m_error_msg, "Rankine Indirect Power Cycle Initialization"));
}
}
else
{
m_error_msg = util::format("The user defined field HTF table must contain at least 3 rows and exactly 7 columns. The current table contains %d row(s) and %d column(s)", n_rows, n_cols);
throw(C_csp_exception(m_error_msg, "Rankine Indirect Power Cycle Initialization"));
}
}
else
{
throw(C_csp_exception("Power cycle HTF code is not recognized", "Rankine Indirect Power Cycle Initialization"));
}
// Calculations for hardcoded Rankine power cycle model
if( !ms_params.m_is_user_defined_pc )
{
if(ms_params.m_tech_type == 1)
{ // Power tower applications
double dTemp[18][20] =
{
{ 0.20000, 0.25263, 0.30526, 0.35789, 0.41053, 0.46316, 0.51579, 0.56842, 0.62105, 0.67368, 0.72632, 0.77895, 0.83158, 0.88421, 0.93684, 0.98947, 1.04211, 1.09474, 1.14737, 1.20000 }, //[-] Normalized HTF temperature for main effect data
{ 0.16759, 0.21750, 0.26932, 0.32275, 0.37743, 0.43300, 0.48910, 0.54545, 0.60181, 0.65815, 0.71431, 0.77018, 0.82541, 0.88019, 0.93444, 0.98886, 1.04378, 1.09890, 1.15425, 1.20982 }, //[-] Main effect, power, normalized HTF temperature
{ 0.19656, 0.24969, 0.30325, 0.35710, 0.41106, 0.46497, 0.51869, 0.57215, 0.62529, 0.67822, 0.73091, 0.78333, 0.83526, 0.88694, 0.93838, 0.98960, 1.04065, 1.09154, 1.14230, 1.19294 }, //[-] Main effect, heat, normalized HTF temperature
{ 3000.00, 4263.16, 5526.32, 6789.47, 8052.63, 9315.79, 10578.95, 11842.11, 13105.26, 14368.42, 15631.58, 16894.74, 18157.89, 19421.05, 20684.21, 21947.37, 23210.53, 24473.68, 25736.84, 27000.00 }, //[Pa] Condenser Pressure (~24.1 C to ~66.7 C) for main effect data
{ 1.07401, 1.04917, 1.03025, 1.01488, 1.00201, 0.99072, 0.98072, 0.97174, 0.96357, 0.95607, 0.94914, 0.94269, 0.93666, 0.93098, 0.92563, 0.92056, 0.91573, 0.91114, 0.90675, 0.90255 }, //[-] Main Effect, power, Condenser Pressure
{ 1.00880, 1.00583, 1.00355, 1.00168, 1.00010, 0.99870, 0.99746, 0.99635, 0.99532, 0.99438, 0.99351, 0.99269, 0.99193, 0.99121, 0.99052, 0.98988, 0.98926, 0.98867, 0.98810, 0.98756 }, //[-] Main Effect, heat, Condenser Pressure
{ 0.10000, 0.17368, 0.24737, 0.32105, 0.39474, 0.46842, 0.54211, 0.61579, 0.68947, 0.76316, 0.83684, 0.91053, 0.98421, 1.05789, 1.13158, 1.20526, 1.27895, 1.35263, 1.42632, 1.50000 }, //[-] Normalized HTF mass flow rate for main effect data
{ 0.09403, 0.16542, 0.23861, 0.31328, 0.38901, 0.46540, 0.54203, 0.61849, 0.69437, 0.76928, 0.84282, 0.91458, 0.98470, 1.05517, 1.12536, 1.19531, 1.26502, 1.33450, 1.40376, 1.47282 }, //[-] Main Effect, power, normalized HTF mass flow rate
{ 0.10659, 0.18303, 0.25848, 0.33316, 0.40722, 0.48075, 0.55381, 0.62646, 0.69873, 0.77066, 0.84228, 0.91360, 0.98464, 1.05542, 1.12596, 1.19627, 1.26637, 1.33625, 1.40593, 1.47542 }, //[-] Main Effect, heat, normalized HTF mass flow rate
{ 0.20000, 0.25263, 0.30526, 0.35789, 0.41053, 0.46316, 0.51579, 0.56842, 0.62105, 0.67368, 0.72632, 0.77895, 0.83158, 0.88421, 0.93684, 0.98947, 1.04211, 1.09474, 1.14737, 1.20000 },
{ 1.03323, 1.04058, 1.04456, 1.04544, 1.04357, 1.03926, 1.03282, 1.02446, 1.01554, 1.00944, 1.00487, 1.00169, 0.99986, 0.99926, 0.99980, 1.00027, 1.00021, 1.00015, 1.00006, 0.99995 },
{ 0.98344, 0.98630, 0.98876, 0.99081, 0.99247, 0.99379, 0.99486, 0.99574, 0.99649, 0.99716, 0.99774, 0.99826, 0.99877, 0.99926, 0.99972, 1.00017, 1.00060, 1.00103, 1.00143, 1.00182 },
{ 3000.00, 4263.16, 5526.32, 6789.47, 8052.63, 9315.79, 10578.95, 11842.11, 13105.26, 14368.42, 15631.58, 16894.74, 18157.89, 19421.05, 20684.21, 21947.37, 23210.53, 24473.68, 25736.84, 27000.00 }, //[Pa] Condenser Pressure
{ 0.99269, 0.99520, 0.99718, 0.99882, 1.00024, 1.00150, 1.00264, 1.00368, 1.00464, 1.00554, 1.00637, 1.00716, 1.00790, 1.00840, 1.00905, 1.00965, 1.01022, 1.01075, 1.01126, 1.01173 },
{ 0.99768, 0.99861, 0.99933, 0.99992, 1.00043, 1.00087, 1.00127, 1.00164, 1.00197, 1.00227, 1.00255, 1.00282, 1.00307, 1.00331, 1.00353, 1.00375, 1.00395, 1.00415, 1.00433, 1.00451 },
{ 0.10000, 0.17368, 0.24737, 0.32105, 0.39474, 0.46842, 0.54211, 0.61579, 0.68947, 0.76316, 0.83684, 0.91053, 0.98421, 1.05789, 1.13158, 1.20526, 1.27895, 1.35263, 1.42632, 1.50000 },
{ 1.00812, 1.00513, 1.00294, 1.00128, 0.99980, 0.99901, 0.99855, 0.99836, 0.99846, 0.99883, 0.99944, 1.00033, 1.00042, 1.00056, 1.00069, 1.00081, 1.00093, 1.00104, 1.00115, 1.00125 },
{ 1.09816, 1.07859, 1.06487, 1.05438, 1.04550, 1.03816, 1.03159, 1.02579, 1.02061, 1.01587, 1.01157, 1.00751, 1.00380, 1.00033, 0.99705, 0.99400, 0.99104, 0.98832, 0.98565, 0.98316 }
};
m_db.assign(dTemp[0], 18, 20);
}
else if(ms_params.m_tech_type == 2)
{ // Low temperature parabolic trough applications
double dTemp[18][20] =
{
{ 0.10000, 0.16842, 0.23684, 0.30526, 0.37368, 0.44211, 0.51053, 0.57895, 0.64737, 0.71579, 0.78421, 0.85263, 0.92105, 0.98947, 1.05789, 1.12632, 1.19474, 1.26316, 1.33158, 1.40000 },
{ 0.08547, 0.14823, 0.21378, 0.28166, 0.35143, 0.42264, 0.49482, 0.56747, 0.64012, 0.71236, 0.78378, 0.85406, 0.92284, 0.98989, 1.05685, 1.12369, 1.19018, 1.25624, 1.32197, 1.38744 },
{ 0.10051, 0.16934, 0.23822, 0.30718, 0.37623, 0.44534, 0.51443, 0.58338, 0.65209, 0.72048, 0.78848, 0.85606, 0.92317, 0.98983, 1.05604, 1.12182, 1.18718, 1.25200, 1.31641, 1.38047 },
{ 3000.00, 4263.16, 5526.32, 6789.47, 8052.63, 9315.79, 10578.95, 11842.11, 13105.26, 14368.42, 15631.58, 16894.74, 18157.89, 19421.05, 20684.21, 21947.37, 23210.53, 24473.68, 25736.84, 27000.00 },
{ 1.08827, 1.06020, 1.03882, 1.02145, 1.00692, 0.99416, 0.98288, 0.97273, 0.96350, 0.95504, 0.94721, 0.93996, 0.93314, 0.92673, 0.92069, 0.91496, 0.90952, 0.90433, 0.89938, 0.89464 },
{ 1.01276, 1.00877, 1.00570, 1.00318, 1.00106, 0.99918, 0.99751, 0.99601, 0.99463, 0.99335, 0.99218, 0.99107, 0.99004, 0.98907, 0.98814, 0.98727, 0.98643, 0.98563, 0.98487, 0.98413 },
{ 0.10000, 0.17368, 0.24737, 0.32105, 0.39474, 0.46842, 0.54211, 0.61579, 0.68947, 0.76316, 0.83684, 0.91053, 0.98421, 1.05789, 1.13158, 1.20526, 1.27895, 1.35263, 1.42632, 1.50000 },
{ 0.09307, 0.16421, 0.23730, 0.31194, 0.38772, 0.46420, 0.54098, 0.61763, 0.69374, 0.76896, 0.84287, 0.91511, 0.98530, 1.05512, 1.12494, 1.19447, 1.26373, 1.33273, 1.40148, 1.46999 },
{ 0.10741, 0.18443, 0.26031, 0.33528, 0.40950, 0.48308, 0.55610, 0.62861, 0.70066, 0.77229, 0.84354, 0.91443, 0.98497, 1.05520, 1.12514, 1.19478, 1.26416, 1.33329, 1.40217, 1.47081 },
{ 0.10000, 0.16842, 0.23684, 0.30526, 0.37368, 0.44211, 0.51053, 0.57895, 0.64737, 0.71579, 0.78421, 0.85263, 0.92105, 0.98947, 1.05789, 1.12632, 1.19474, 1.26316, 1.33158, 1.40000 },
{ 1.01749, 1.03327, 1.04339, 1.04900, 1.05051, 1.04825, 1.04249, 1.03343, 1.02126, 1.01162, 1.00500, 1.00084, 0.99912, 0.99966, 0.99972, 0.99942, 0.99920, 0.99911, 0.99885, 0.99861 },
{ 0.99137, 0.99297, 0.99431, 0.99564, 0.99681, 0.99778, 0.99855, 0.99910, 0.99948, 0.99971, 0.99984, 0.99989, 0.99993, 0.99993, 0.99992, 0.99992, 0.99992, 1.00009, 1.00010, 1.00012 },
{ 3000.00, 4263.16, 5526.32, 6789.47, 8052.63, 9315.79, 10578.95, 11842.11, 13105.26, 14368.42, 15631.58, 16894.74, 18157.89, 19421.05, 20684.21, 21947.37, 23210.53, 24473.68, 25736.84, 27000.00 },
{ 0.99653, 0.99756, 0.99839, 0.99906, 0.99965, 1.00017, 1.00063, 1.00106, 1.00146, 1.00183, 1.00218, 1.00246, 1.00277, 1.00306, 1.00334, 1.00361, 1.00387, 1.00411, 1.00435, 1.00458 },
{ 0.99760, 0.99831, 0.99888, 0.99934, 0.99973, 1.00008, 1.00039, 1.00067, 1.00093, 1.00118, 1.00140, 1.00161, 1.00180, 1.00199, 1.00217, 1.00234, 1.00250, 1.00265, 1.00280, 1.00294 },
{ 0.10000, 0.17368, 0.24737, 0.32105, 0.39474, 0.46842, 0.54211, 0.61579, 0.68947, 0.76316, 0.83684, 0.91053, 0.98421, 1.05789, 1.13158, 1.20526, 1.27895, 1.35263, 1.42632, 1.50000 },
{ 1.01994, 1.01645, 1.01350, 1.01073, 1.00801, 1.00553, 1.00354, 1.00192, 1.00077, 0.99995, 0.99956, 0.99957, 1.00000, 0.99964, 0.99955, 0.99945, 0.99937, 0.99928, 0.99919, 0.99918 },
{ 1.02055, 1.01864, 1.01869, 1.01783, 1.01508, 1.01265, 1.01031, 1.00832, 1.00637, 1.00454, 1.00301, 1.00141, 1.00008, 0.99851, 0.99715, 0.99586, 0.99464, 0.99347, 0.99227, 0.99177 }
};
m_db.assign(dTemp[0], 18, 20);
}
else if(ms_params.m_tech_type == 3)
{ // Sliding pressure power cycle formulation
double dTemp[18][10] =
{
{ 0.10000, 0.21111, 0.32222, 0.43333, 0.54444, 0.65556, 0.76667, 0.87778, 0.98889, 1.10000 },
{ 0.89280, 0.90760, 0.92160, 0.93510, 0.94820, 0.96110, 0.97370, 0.98620, 0.99860, 1.01100 },
{ 0.93030, 0.94020, 0.94950, 0.95830, 0.96690, 0.97520, 0.98330, 0.99130, 0.99910, 1.00700 },
{ 4000.00, 6556.00, 9111.00, 11677.0, 14222.0, 16778.0, 19333.0, 21889.0, 24444.0, 27000.0 },
{ 1.04800, 1.01400, 0.99020, 0.97140, 0.95580, 0.94240, 0.93070, 0.92020, 0.91060, 0.90190 },
{ 0.99880, 0.99960, 1.00000, 1.00100, 1.00100, 1.00100, 1.00100, 1.00200, 1.00200, 1.00200 },
{ 0.20000, 0.31667, 0.43333, 0.55000, 0.66667, 0.78333, 0.90000, 1.01667, 1.13333, 1.25000 },
{ 0.16030, 0.27430, 0.39630, 0.52310, 0.65140, 0.77820, 0.90060, 1.01600, 1.12100, 1.21400 },
{ 0.22410, 0.34700, 0.46640, 0.58270, 0.69570, 0.80550, 0.91180, 1.01400, 1.11300, 1.20700 },
{ 0.10000, 0.21111, 0.32222, 0.43333, 0.54444, 0.65556, 0.76667, 0.87778, 0.98889, 1.10000 },
{ 1.05802, 1.05127, 1.04709, 1.03940, 1.03297, 1.02480, 1.01758, 1.00833, 1.00180, 0.99307 },
{ 1.03671, 1.03314, 1.02894, 1.02370, 1.01912, 1.01549, 1.01002, 1.00486, 1.00034, 0.99554 },
{ 4000.00, 6556.00, 9111.00, 11677.0, 14222.0, 16778.0, 19333.0, 21889.0, 24444.0, 27000.0 },
{ 1.00825, 0.98849, 0.99742, 1.02080, 1.02831, 1.03415, 1.03926, 1.04808, 1.05554, 1.05862 },
{ 1.01838, 1.02970, 0.99785, 0.99663, 0.99542, 0.99183, 0.98897, 0.99299, 0.99013, 0.98798 }, // tweaked entry #4 to be the average of 3 and 5. it was an outlier in the simulation. mjw 3.31.11
{ 0.20000, 0.31667, 0.43333, 0.55000, 0.66667, 0.78333, 0.90000, 1.01667, 1.13333, 1.25000 },
{ 1.43311, 1.27347, 1.19090, 1.13367, 1.09073, 1.05602, 1.02693, 1.00103, 0.97899, 0.95912 },
{ 0.48342, 0.64841, 0.64322, 0.74366, 0.76661, 0.82764, 0.97792, 1.15056, 1.23117, 1.31179 } // tweaked entry #9 to be the average of 8 and 10. it was an outlier in the simulation mjw 3.31.11
};
m_db.assign(dTemp[0], 18, 10);
}
else if(ms_params.m_tech_type == 4)
{ // Geothermal applications - Isopentane Rankine cycle
double dTemp[18][20] =
{
{ 0.50000, 0.53158, 0.56316, 0.59474, 0.62632, 0.65789, 0.68947, 0.72105, 0.75263, 0.78421, 0.81579, 0.84737, 0.87895, 0.91053, 0.94211, 0.97368, 1.00526, 1.03684, 1.06842, 1.10000 },
{ 0.55720, 0.58320, 0.60960, 0.63630, 0.66330, 0.69070, 0.71840, 0.74630, 0.77440, 0.80270, 0.83130, 0.85990, 0.88870, 0.91760, 0.94670, 0.97570, 1.00500, 1.03400, 1.06300, 1.09200 },
{ 0.67620, 0.69590, 0.71570, 0.73570, 0.75580, 0.77600, 0.79630, 0.81670, 0.83720, 0.85780, 0.87840, 0.89910, 0.91990, 0.94070, 0.96150, 0.98230, 1.00300, 1.02400, 1.04500, 1.06600 },
{ 35000.00, 46315.79, 57631.58, 68947.37, 80263.16, 91578.95, 102894.74, 114210.53, 125526.32, 136842.11, 148157.89, 159473.68, 170789.47, 182105.26, 193421.05, 204736.84, 216052.63, 227368.42, 238684.21, 250000.00 },
{ 1.94000, 1.77900, 1.65200, 1.54600, 1.45600, 1.37800, 1.30800, 1.24600, 1.18900, 1.13700, 1.08800, 1.04400, 1.00200, 0.96290, 0.92620, 0.89150, 0.85860, 0.82740, 0.79770, 0.76940 },
{ 1.22400, 1.19100, 1.16400, 1.14000, 1.11900, 1.10000, 1.08300, 1.06700, 1.05200, 1.03800, 1.02500, 1.01200, 1.00000, 0.98880, 0.97780, 0.96720, 0.95710, 0.94720, 0.93770, 0.92850 },
{ 0.80000, 0.81316, 0.82632, 0.83947, 0.85263, 0.86579, 0.87895, 0.89211, 0.90526, 0.91842, 0.93158, 0.94474, 0.95789, 0.97105, 0.98421, 0.99737, 1.01053, 1.02368, 1.03684, 1.05000 },
{ 0.84760, 0.85880, 0.86970, 0.88050, 0.89120, 0.90160, 0.91200, 0.92210, 0.93220, 0.94200, 0.95180, 0.96130, 0.97080, 0.98010, 0.98920, 0.99820, 1.00700, 1.01600, 1.02400, 1.03300 },
{ 0.89590, 0.90350, 0.91100, 0.91840, 0.92570, 0.93290, 0.93990, 0.94680, 0.95370, 0.96040, 0.96700, 0.97350, 0.97990, 0.98620, 0.99240, 0.99850, 1.00400, 1.01000, 1.01500, 1.02100 },
{ 0.50000, 0.53158, 0.56316, 0.59474, 0.62632, 0.65789, 0.68947, 0.72105, 0.75263, 0.78421, 0.81579, 0.84737, 0.87895, 0.91053, 0.94211, 0.97368, 1.00526, 1.03684, 1.06842, 1.10000 },
{ 0.79042, 0.80556, 0.82439, 0.84177, 0.85786, 0.87485, 0.88898, 0.90182, 0.91783, 0.93019, 0.93955, 0.95105, 0.96233, 0.97150, 0.98059, 0.98237, 0.99829, 1.00271, 1.02084, 1.02413 },
{ 0.67400, 0.69477, 0.71830, 0.73778, 0.75991, 0.78079, 0.80052, 0.82622, 0.88152, 0.92737, 0.93608, 0.94800, 0.95774, 0.96653, 0.97792, 0.99852, 0.99701, 1.01295, 1.02825, 1.04294 },
{ 35000.00, 46315.79, 57631.58, 68947.37, 80263.16, 91578.95, 102894.74, 114210.53, 125526.32, 136842.11, 148157.89, 159473.68, 170789.47, 182105.26, 193421.05, 204736.84, 216052.63, 227368.42, 238684.21, 250000.00 },
{ 0.80313, 0.82344, 0.83980, 0.86140, 0.87652, 0.89274, 0.91079, 0.92325, 0.93832, 0.95229, 0.97004, 0.98211, 1.00399, 1.01514, 1.03494, 1.04962, 1.06646, 1.08374, 1.10088, 1.11789 },
{ 0.93426, 0.94458, 0.94618, 0.95878, 0.96352, 0.96738, 0.97058, 0.98007, 0.98185, 0.99048, 0.99144, 0.99914, 1.00696, 1.00849, 1.01573, 1.01973, 1.01982, 1.02577, 1.02850, 1.03585 },
{ 0.80000, 0.81316, 0.82632, 0.83947, 0.85263, 0.86579, 0.87895, 0.89211, 0.90526, 0.91842, 0.93158, 0.94474, 0.95789, 0.97105, 0.98421, 0.99737, 1.01053, 1.02368, 1.03684, 1.05000 },
{ 1.06790, 1.06247, 1.05688, 1.05185, 1.04687, 1.04230, 1.03748, 1.03281, 1.02871, 1.02473, 1.02050, 1.01639, 1.01204, 1.00863, 1.00461, 1.00051, 0.99710, 0.99352, 0.98974, 0.98692 },
{ 1.02335, 1.02130, 1.02041, 1.01912, 1.01655, 1.01601, 1.01379, 1.01431, 1.01321, 1.01207, 1.01129, 1.00784, 1.00548, 1.00348, 1.00183, 0.99982, 0.99698, 0.99457, 0.99124, 0.99016 }
};
m_db.assign(dTemp[0], 18, 20);
}
else if (ms_params.m_tech_type == 5)
{ // CUSTOM cycle with 3.06 m^2 annulus area designed at 4.75 inHg and 3.06 m^2 annulus area in IPSE.
double dTemp[18][12] =
{
{ 0.934693878,1,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061 },
{ 0.937081782,0.999998651,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474,1.031700474 },
{ 0.948385677,1.000000875,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971,1.026049971 },
{ 7619,9313,11010,12700,14390,16090,17780,19470,21170,22870,24550,26250 },
{ 0.999690724,1.001967883,1.00348071,1.003333606,1.00207008,0.999998651,0.996664374,0.992651944,0.988196283,0.983359267,0.978598926,0.97371933 },
{ 0.999779458,0.999840287,0.999890769,0.999941469,0.999975609,1.000000875,1.000012605,1.000020238,1.000039055,1.000031269,1.000031496,1.000032971 },
{ 0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1,1.1,1.2,1.2 },
{ 0.215149586,0.328850518,0.436394916,0.539864866,0.639394617,0.73498448,0.826843573,0.915142918,0.999998651,1.081434508,1.160440089,1.160440089 },
{ 0.2621648,0.37422441,0.476942504,0.57385383,0.666050657,0.754247658,0.839016491,0.92082275,1.000000875,1.076836961,1.151614098,1.151614098 },
{ 0.934693878,1,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061,1.032653061 },
{ 1.639,1.000,0.759,0.759,0.759,0.759,0.759,0.759,0.759,0.759,0.759,0.759 },
{ 0.937,0.989,1.067,1.067,1.067,1.067,1.067,1.067,1.067,1.067,1.067,1.067 },
{ 7619,9313,11010,12700,14390,16090,17780,19470,21170,22870,24550,26250 },
{ 0.966551714,0.972009369,0.977500495,0.985690652,0.993126541,1.000004694,1.008086172,1.01640783,1.023030734,1.029294674,1.034314589,1.038480615 },
{ 0.99985798,0.99988411,0.99991681,0.999924596,0.999957647,0.999996831,1.000058116,1.000114471,1.000105184,1.000175662,1.000203606,1.000215132 },
{ 0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1,1.1,1.2,1.2 },
{ 1.030053251,0.964685776,0.969170019,0.976627457,0.983570294,0.989910129,0.993625786,0.997292978,1.000011907,1.004901419,1.010667996,1.010667996 },
{ 0.887468632,0.852454545,0.87974177,0.904559441,0.925728386,0.945839977,0.964675058,0.982688495,0.999990802,1.016408573,1.032696789,1.032696789 }
};
m_db.assign(dTemp[0], 18, 12);
}
else if (ms_params.m_tech_type == 6)
{ // CUSTOM cycle with 5.16 annulus area last stage turbine (PT3) designed for 3"Hg backpressure in IPSE.
double dTemp[18][28] =
{
{ 0.9347,1.0000,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327 },
{ 0.936,1.000,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032,1.032 },
{ 0.948,1.000,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026,1.026 },
{ 4233.0000,5080.0000,5926.0000,6773.0000,7619.0000,8466.0000,9313.0000,10160.0000,11010.0000,11850.0000,12700.0000,13550.0000,14390.0000,15240.0000,16090.0000,16930.0000,17780.0000,18620.0000,19470.0000,20320.0000,21170.0000,22020.0000,22870.0000,23700.0000,24550.0000,25400.0000,26250.0000,27100.0000 },
{ 1.010,1.011,1.012,1.011,1.010,1.008,1.004,1.000,0.995,0.990,0.984,0.978,0.972,0.966,0.960,0.954,0.949,0.944,0.939,0.934,0.929,0.924,0.920,0.915,0.910,0.905,0.901,0.897 },
{ 1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000,1.000 },
{ 0.2000,0.3000,0.4000,0.5000,0.6000,0.7000,0.8000,0.9000,1.0000,1.1000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000 },
{ 0.204,0.317,0.426,0.530,0.631,0.728,0.823,0.913,1.000,1.084,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164,1.164 },
{ 0.262,0.374,0.477,0.574,0.666,0.754,0.839,0.921,1.000,1.077,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152,1.152 },
{ 0.9347,1.0000,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327,1.0327 },
{ 1.23,1.00,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91,0.91 },
{ 1.03,1.00,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98,0.98 },
{ 4233.0000,5080.0000,5926.0000,6773.0000,7619.0000,8466.0000,9313.0000,10160.0000,11010.0000,11850.0000,12700.0000,13550.0000,14390.0000,15240.0000,16090.0000,16930.0000,17780.0000,18620.0000,19470.0000,20320.0000,21170.0000,22020.0000,22870.0000,23700.0000,24550.0000,25400.0000,26250.0000,27100.0000 },
{ 0.9484,0.9552,0.9612,0.9699,0.9766,0.9833,0.9905,1.0000,1.0085,1.0160,1.0224,1.0304,1.0351,1.0393,1.0412,1.0435,1.0451,1.0468,1.0484,1.0503,1.0521,1.0538,1.0542,1.0569,1.0599,1.0627,1.0654,1.0665 },
{ 0.9998,0.9998,0.9998,0.9999,0.9999,0.9999,1.0000,1.0000,1.0000,1.0001,1.0001,1.0001,1.0001,1.0001,1.0002,1.0002,1.0001,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002,1.0002 },
{ 0.2000,0.3000,0.4000,0.5000,0.6000,0.7000,0.8000,0.9000,1.0000,1.1000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000,1.2000 },
{ 1.0528,0.9862,0.9735,0.9791,0.9870,0.9946,0.9968,0.9976,1.0000,1.0022,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039,1.0039 },
{ 0.8864,0.8522,0.8795,0.9044,0.9256,0.9458,0.9649,0.9827,1.0000,1.0168,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330,1.0330 }
};
m_db.assign(dTemp[0], 18, 28);
}
else
{
m_error_msg = util::format("The power cycle technology type identifier, %d, must be [1..6]", ms_params.m_tech_type);
throw(C_csp_exception(m_error_msg, "Power cycle initialization"));
}
ms_params.m_P_cond_min = physics::InHgToPa(ms_params.m_P_cond_min);
// find min and max hybrid cooling dispatch fractions
for( int i = 0; i<9; i++ )
{
double F_wc_current = ms_params.m_F_wc[i];
if(F_wc_current < 0.0)
{
m_error_msg = util::format("The hybrid dispatch value at TOU period %d was entered as %lg. It was reset to 0", i + 1, F_wc_current);
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
F_wc_current = 0.0;
}
if(F_wc_current > 1.0)
{
m_error_msg = util::format("The hybrid dispatch value at TOU period %d was entered as %lg. It was reset to 1.0", i + 1, F_wc_current);
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
F_wc_current = 1.0;
}
m_F_wcMax = fmax(m_F_wcMax, F_wc_current);
m_F_wcMin = fmin(m_F_wcMin, F_wc_current);
ms_params.m_F_wc[i] = F_wc_current;
}
// Calculate the power block side steam enthalpy rise for blowdown calculations
// Steam properties are as follows:
// =======================================================================
// | T(C) | P(MPa) | h(kJ/kg) | s(kJ/kg-K) | x(-) | v(m3/kg) | U(kJ/kg) |
// =======================================================================
// Limit the boiler pressure to below the supercritical point. If a supercritical pressure is used,
// notify the user that the pressure value is being switched.
if( ms_params.m_P_boil > 220.0 )
{
m_error_msg = util::format("The boiler pressure provided by the user, %lg, requires a supercritical system. The pressure has been reset to 220 bar", ms_params.m_P_boil);
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
ms_params.m_P_boil = 220.0; // Set to 220 bar, 22 MPa
}
double h_st_hot, h_st_cold;
// 1.3.13 twn: Use FIT water props to calculate enthalpy rise over economizer/boiler/superheater
water_state wp;
water_TP(ms_params.m_T_htf_hot_ref - GetFieldToTurbineTemperatureDropC() + 273.15, ms_params.m_P_boil*100.0, &wp); // Get hot side enthalpy [kJ/kg] using Steam Props
h_st_hot = wp.enth;
water_PQ(ms_params.m_P_boil*100.0, 0.0, &wp);
h_st_cold = wp.enth;
m_delta_h_steam = h_st_hot - h_st_cold + 4.91*100.0;
m_is_initialized = true;
// Add the initial call from the (if(m_bFirstCall)) from RankineCycle here:
// The user provides a reference efficiency, ambient temperature, and cooling system parameters. Using
// this information, we have to adjust the provided reference efficiency to match the normalized efficiency
// that is part of the power block regression coefficients. I.e. if the user provides a ref. ambient temperature
// of 25degC, but the power block coefficients indicate that the normalized efficiency equals 1.0 at an ambient
// temp of 20degC, we have to adjust the user's efficiency value back to the coefficient set.
double Psat_ref = 0;
switch( ms_params.m_CT )
{
case 1: // Wet cooled case
if( ms_params.m_tech_type != 4 )
{
water_TQ(ms_params.m_dT_cw_ref + 3.0 + ms_params.m_T_approach + ms_params.m_T_amb_des + 273.15, 1.0, &wp);
Psat_ref = wp.pres*1000.0;
}
else
{
Psat_ref = CSP::P_sat4(ms_params.m_dT_cw_ref + 3.0 + ms_params.m_T_approach + ms_params.m_T_amb_des); // Isopentane
}
break;
case 2:
case 3: // Dry cooled and hyrbid cases
if( ms_params.m_tech_type != 4 )
{
water_TQ(ms_params.m_T_ITD_des + ms_params.m_T_amb_des + 273.15, 1.0, &wp);
Psat_ref = wp.pres * 1000.0;
}
else
{
Psat_ref = CSP::P_sat4(ms_params.m_T_ITD_des + ms_params.m_T_amb_des); // Isopentane
}
break;
case 4: // Once-through surface condenser case ARD
if (ms_params.m_tech_type != 4)
{
water_TQ(ms_params.m_dT_cw_ref + 3.0 /*dT at hot side*/ + ms_params.m_T_approach + ms_params.m_T_amb_des + 273.15, 1.0, &wp);
Psat_ref = wp.pres*1000.0;
}
else
{
Psat_ref = CSP::P_sat4(ms_params.m_dT_cw_ref + 3.0 + ms_params.m_T_approach + ms_params.m_T_amb_des); // Isopentane
}
} // end cooling technology switch()
m_eta_adj = ms_params.m_eta_ref / (Interpolate(12, 2, Psat_ref) / Interpolate(22, 2, Psat_ref));
}
else
{ // Initialization calculations for User Defined power cycle model
// Import the newer single combined UDPC table if it's populated, otherwise try using the older three separate tables
if (!ms_params.mc_combined_ind.is_single()) {
try {
split_ind_tbl(ms_params.mc_combined_ind, ms_params.mc_T_htf_ind, ms_params.mc_m_dot_htf_ind, ms_params.mc_T_amb_ind);
}
catch (...) {
m_error_msg = "Cannot import the single UDPC table";
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
if (ms_params.mc_T_htf_ind.is_single() || ms_params.mc_T_amb_ind.is_single() || ms_params.mc_m_dot_htf_ind.is_single()) {
throw(C_csp_exception("UDPC tables are not set", "UDPC Table Importation"));
}
}
}
else if ( ms_params.mc_T_htf_ind.is_single() || ms_params.mc_T_amb_ind.is_single() || ms_params.mc_m_dot_htf_ind.is_single() ) {
throw(C_csp_exception("UDPC tables are not set", "UDPC Table Importation"));
}
// Load tables into user defined power cycle member class
// .init method will throw an error if initialization fails, so catch upstream
mc_user_defined_pc.init( ms_params.mc_T_htf_ind, ms_params.m_T_htf_hot_ref, ms_params.m_T_htf_low, ms_params.m_T_htf_high,
ms_params.mc_T_amb_ind, ms_params.m_T_amb_des, ms_params.m_T_amb_low, ms_params.m_T_amb_high,
ms_params.mc_m_dot_htf_ind, 1.0, ms_params.m_m_dot_htf_low, ms_params.m_m_dot_htf_high );
if(ms_params.m_W_dot_cooling_des != ms_params.m_W_dot_cooling_des || ms_params.m_W_dot_cooling_des < 0.0 )
{
ms_params.m_W_dot_cooling_des = 0.0;
m_error_msg = util::format("The cycle cooling electric parasitic at design input for the user-defined power cycle was either not defined or negative."
" It was reset to 0.0 for the timeseries simulation");
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
}
if(ms_params.m_m_dot_water_des != ms_params.m_m_dot_water_des || ms_params.m_m_dot_water_des < 0.0 )
{
ms_params.m_m_dot_water_des = 0.0;
m_error_msg = util::format("The cycle water use at design input for the user-defined power cycle was either not defined or negative."
" It was reset to 0.0 for the timeseries simulation");
mc_csp_messages.add_message(C_csp_messages::WARNING, m_error_msg);
}
}
// Calculate design point HTF mass flow rate
m_cp_htf_design = mc_pc_htfProps.Cp(physics::CelciusToKelvin((ms_params.m_T_htf_hot_ref + ms_params.m_T_htf_cold_ref) / 2.0)); //[kJ/kg-K]
ms_params.m_P_ref *= 1000.0; //[kW] convert from MW
m_q_dot_design = ms_params.m_P_ref / 1000.0 / ms_params.m_eta_ref; //[MWt]
m_m_dot_design = m_q_dot_design*1000.0 / (m_cp_htf_design*((ms_params.m_T_htf_hot_ref - ms_params.m_T_htf_cold_ref)))*3600.0; //[kg/hr]
m_m_dot_min = ms_params.m_cycle_cutoff_frac*m_m_dot_design; //[kg/hr]
m_m_dot_max = ms_params.m_cycle_max_frac*m_m_dot_design; //[kg/hr]
// 8.30.2010 :: Calculate the startup energy needed
m_startup_energy_required = ms_params.m_startup_frac * ms_params.m_P_ref / ms_params.m_eta_ref; // [kWt-hr]
// Finally, set member model-timestep-tracking variables
m_standby_control_prev = OFF; // Assume power cycle is off when simulation begins
m_startup_energy_remain_prev = m_startup_energy_required; //[kW-hr]
m_startup_time_remain_prev = ms_params.m_startup_time; //[hr]
m_ncall = -1;
solved_params.m_W_dot_des = ms_params.m_P_ref / 1000.0; //[MW], convert from kW
solved_params.m_eta_des = ms_params.m_eta_ref; //[-]
//solved_params.m_q_dot_des = solved_params.m_W_dot_des / solved_params.m_eta_des; //[MW]
solved_params.m_q_dot_des = m_q_dot_design; //[MWt]
solved_params.m_q_startup = m_startup_energy_required/1.E3; //[MWt-hr]
solved_params.m_max_frac = ms_params.m_cycle_max_frac; //[-]
solved_params.m_cutoff_frac = ms_params.m_cycle_cutoff_frac; //[-]
solved_params.m_sb_frac = ms_params.m_q_sby_frac; //[-]
solved_params.m_T_htf_hot_ref = ms_params.m_T_htf_hot_ref; //[C]
// Calculate design point HTF mass flow rate
// double c_htf = mc_pc_htfProps.Cp(physics::CelciusToKelvin((ms_params.m_T_htf_hot_ref + ms_params.m_T_htf_cold_ref) / 2.0)); //[kJ/kg-K]
// m_m_dot_design = solved_params.m_q_dot_des*1000.0/(c_htf*((ms_params.m_T_htf_hot_ref - ms_params.m_T_htf_cold_ref)))*3600.0; //[kg/hr]
solved_params.m_m_dot_design = m_m_dot_design; //[kg/hr]
solved_params.m_m_dot_min = m_m_dot_min; //[kg/hr]
solved_params.m_m_dot_max = m_m_dot_max; //[kg/hr]
// Cold storage and radiator setup ARD
if (ms_params.m_CT==4) //only if radiative cooling chosen.
{
//Radiator
C_csp_radiator::S_params *rad = &mc_radiator.ms_params;
//rad->m_night_hrs = 9; //Numer of hours of radiative cooling in summer peak
//If two tank cold storage
if (mc_two_tank_ctes.ms_params.m_ctes_type == 2)
{
mc_two_tank_ctes.ms_params.m_tes_fl = 3; // Hardcode 3 for water liquid
mc_two_tank_ctes.ms_params.m_field_fl = 3; // Hardcode 3; not used. Designate fluid in radiator model separately.
mc_two_tank_ctes.ms_params.m_is_hx = false; // MSPT assumes direct storage, so no user input required here: hardcode = false
mc_two_tank_ctes.ms_params.m_W_dot_pc_design = ms_params.m_P_ref / 1000; //[MWe]
mc_two_tank_ctes.ms_params.m_eta_pc_factor = ms_params.m_eta_ref / (1 - ms_params.m_eta_ref); //[-] In order to allow this value to be used in the formula to determine size of tanks.
mc_two_tank_ctes.ms_params.m_hot_tank_Thtr = 0; //set point [C]
mc_two_tank_ctes.ms_params.m_hot_tank_max_heat = 30; //heater capacity [MWe]
mc_two_tank_ctes.ms_params.m_cold_tank_Thtr = 0; //set point [C]
mc_two_tank_ctes.ms_params.m_cold_tank_max_heat = 15; //capacity [MWe]
mc_two_tank_ctes.ms_params.m_dt_hot = 0.0; // MSPT assumes direct storage, so no user input here: hardcode = 0.0
mc_two_tank_ctes.ms_params.m_htf_pump_coef = 0.55; //pumping power for HTF thru power block [kW/kg/s]
mc_two_tank_ctes.ms_params.dT_cw_rad = mc_two_tank_ctes.ms_params.m_T_field_out_des - mc_two_tank_ctes.ms_params.m_T_field_in_des; //Reference delta T based on design values given.
mc_two_tank_ctes.ms_params.m_dot_cw_rad = (mc_two_tank_ctes.ms_params.m_W_dot_pc_design*1000000. / mc_two_tank_ctes.ms_params.m_eta_pc_factor) / (4183 /*[J/kg-K]*/ * mc_two_tank_ctes.ms_params.dT_cw_rad); //Calculate design cw mass flow [kg/sec]
rad->m_night_hrs = 2.0 / 15.0 * 180.0 / 3.1415* acos(tan(abs(mc_two_tank_ctes.ms_params.m_lat)*3.1415/180.0)*tan(0.40928)); //Calculate nighttime hours.
mc_two_tank_ctes.ms_params.m_dot_cw_cold = (mc_two_tank_ctes.ms_params.m_dot_cw_rad*mc_two_tank_ctes.ms_params.m_ts_hours) / rad->m_night_hrs;//Set the flow rate on the storage system between tank and HX to radiative field to fill the tank in the shortest night of year (9 hours in Las Vegas Nevada).
//Initialize cold storage
mc_two_tank_ctes.init();
}
//If three-node stratified cold storage
if (mc_two_tank_ctes.ms_params.m_ctes_type >2)
{
mc_stratified_ctes.ms_params.m_tes_fl = 3; // Hardcode 3 for water liquid
mc_stratified_ctes.ms_params.m_field_fl = 3; // Hardcode 3; not used. Designate fluid in radiator model separately.
mc_stratified_ctes.ms_params.m_is_hx = false; // MSPT assumes direct storage, so no user input required here: hardcode = false
mc_stratified_ctes.ms_params.m_W_dot_pc_design = ms_params.m_P_ref / 1000; //[MWe]
mc_stratified_ctes.ms_params.m_eta_pc_factor = ms_params.m_eta_ref / (1 - ms_params.m_eta_ref); //[-] In order to allow this value to be used in the formula to determine size of tanks.
mc_stratified_ctes.ms_params.m_hot_tank_Thtr = 0; //set point [C]
mc_stratified_ctes.ms_params.m_hot_tank_max_heat = 30; //heater capacity [MWe]
mc_stratified_ctes.ms_params.m_cold_tank_Thtr = 0; //set point [C]
mc_stratified_ctes.ms_params.m_cold_tank_max_heat = 15; //capacity [MWe]
mc_stratified_ctes.ms_params.m_dt_hot = 0.0; // MSPT assumes direct storage, so no user input here: hardcode = 0.0
mc_stratified_ctes.ms_params.m_htf_pump_coef = 0.55; //pumping power for HTF thru power block [kW/kg/s]
mc_stratified_ctes.ms_params.dT_cw_rad = mc_stratified_ctes.ms_params.m_T_field_out_des - mc_stratified_ctes.ms_params.m_T_field_in_des; //Reference delta T based on design values given.
mc_stratified_ctes.ms_params.m_dot_cw_rad = (mc_stratified_ctes.ms_params.m_W_dot_pc_design*1000000. / mc_stratified_ctes.ms_params.m_eta_pc_factor) / (4183 /*[J/kg-K]*/ * mc_stratified_ctes.ms_params.dT_cw_rad); //Calculate design cw mass flow [kg/sec]
rad->m_night_hrs = 2.0 / 15.0 * 180.0/3.1415 * acos(tan(abs(mc_stratified_ctes.ms_params.m_lat)*3.1415 / 180.0)*tan(0.40928)); //Calculate nighttime hours.
mc_stratified_ctes.ms_params.m_dot_cw_cold = (mc_stratified_ctes.ms_params.m_dot_cw_rad*mc_stratified_ctes.ms_params.m_ts_hours) / rad->m_night_hrs; //Set the flow rate on the storage system between tank and HX to radiative field to fill the tank in the shortest night of year (9 hours in Las Vegas Nevada).
//Initialize cold storage
mc_stratified_ctes.init();
}
//Radiator
rad->L_c = rad->n*rad->W; //Characteristic length for forced convection, typically equal to n*W unless wind direction is known to determine flow path : Lc[m]
double Afieldmin = rad->Asolar_refl*rad->RM; //Determine radiator field based on solar and RM
rad->Np = static_cast<int>(Afieldmin/(rad->n*rad->W*rad->L))+1; //Truncate to number of parallel sections required for minimum field area and add one to round up.
rad->Afield = rad->n*rad->W*rad->L*rad->Np; //Actual field area after rounding up to number of parallel sections.
//Initialize radiator
mc_radiator.init();
}
} //init
double C_pc_Rankine_indirect_224::get_cold_startup_time()
{
//startup time from cold state
return ms_params.m_startup_time;
}
double C_pc_Rankine_indirect_224::get_warm_startup_time()
{
//startup time from warm state. No differentiation between cold/hot yet.
return ms_params.m_startup_time;
}
double C_pc_Rankine_indirect_224::get_hot_startup_time()
{
//startup time from warm state. No differentiation between cold/warm yet.
return ms_params.m_startup_time;
}
double C_pc_Rankine_indirect_224::get_standby_energy_requirement()
{
return ms_params.m_q_sby_frac * ms_params.m_P_ref / ms_params.m_eta_ref *1.e-3; //MW
}
double C_pc_Rankine_indirect_224::get_cold_startup_energy()
{
//cold startup energy requirement. No differentiation between warm/hot yet.
return ms_params.m_startup_frac* ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //MWt-hr
}
double C_pc_Rankine_indirect_224::get_warm_startup_energy()
{
//warm startup energy requirement. No differentiation between cold/hot yet.
return ms_params.m_startup_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //MWh
}
double C_pc_Rankine_indirect_224::get_hot_startup_energy()
{
//hot startup energy requirement. No differentiation between cold/hot yet.
return ms_params.m_startup_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //MWh
}
double C_pc_Rankine_indirect_224::get_max_thermal_power() //MW
{
return ms_params.m_cycle_max_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //MWh
}
double C_pc_Rankine_indirect_224::get_min_thermal_power() //MW
{
return ms_params.m_cycle_cutoff_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //MWh
}
double C_pc_Rankine_indirect_224::get_max_q_pc_startup()
{
if( m_startup_time_remain_prev > 0.0 )
return fmin(ms_params.m_cycle_max_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3,
m_startup_energy_remain_prev / 1.E3 / m_startup_time_remain_prev); //[MWt]
else if( m_startup_energy_remain_prev > 0.0 )
{
return ms_params.m_cycle_max_frac * ms_params.m_P_ref / ms_params.m_eta_ref*1.e-3; //[MWt]
}
else
{
return 0.0;
}
}
void C_pc_Rankine_indirect_224::get_max_power_output_operation_constraints(double T_amb /*C*/, double & m_dot_HTF_ND_max, double & W_dot_ND_max)
{
if (!ms_params.m_is_user_defined_pc)
{
m_dot_HTF_ND_max = ms_params.m_cycle_max_frac; //[-]
W_dot_ND_max = m_dot_HTF_ND_max;
return;
}
else
{
// Calculate non-dimensional mass flow rate relative to design point
m_dot_HTF_ND_max = ms_params.m_cycle_max_frac; //[-] Use max mass flow rate
// Get ND performance at off-design ambient temperature
W_dot_ND_max = mc_user_defined_pc.get_W_dot_gross_ND
(ms_params.m_T_htf_hot_ref,
T_amb,
m_dot_HTF_ND_max); //[-]
if (W_dot_ND_max >= m_dot_HTF_ND_max)
{
return;
}
// set m_dot_ND to P_cycle_ND
m_dot_HTF_ND_max = W_dot_ND_max;
// Get ND performance at off-design ambient temperature
W_dot_ND_max = mc_user_defined_pc.get_W_dot_gross_ND
(ms_params.m_T_htf_hot_ref,
T_amb,
m_dot_HTF_ND_max); //[-]
return;
}
}
double C_pc_Rankine_indirect_224::get_efficiency_at_TPH(double T_degC, double P_atm, double relhum_pct, double *w_dot_condenser)
{
/*
Get cycle efficiency, assuming full load operation.
If w_dot_condenser var reference is not null, return the condenser power as well.
*/
double eta = std::numeric_limits<double>::quiet_NaN();
if( !ms_params.m_is_user_defined_pc )
{
double P_cycle, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_makeup, W_cool_par, f_hrsys, P_cond, T_cond_out, T_cold;
T_cond_out=T_cold=std::numeric_limits<double>::quiet_NaN(); //check use of Tcold here
// water_state wprop;
double Twet = calc_twet(T_degC, relhum_pct, P_atm*1.01325e6);
RankineCycle(
//inputs
T_degC+273.15, Twet+273.15, P_atm*101325., ms_params.m_T_htf_hot_ref, m_m_dot_design,
2, 0., ms_params.m_P_boil, 1., m_F_wcMin, m_F_wcMax,T_cold,dT_cw_design,
//outputs
P_cycle, eta, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_makeup, W_cool_par, f_hrsys, P_cond, T_cond_out);
if( w_dot_condenser != 0 )
*w_dot_condenser = W_cool_par;
}
else
{
// User-defined power cycle model
// Calculate non-dimensional mass flow rate relative to design point
double m_dot_htf_ND = 1.0; //[-] Use design point mass flow rate
// Get ND performance at off-design ambient temperature
double P_cycle = ms_params.m_P_ref*mc_user_defined_pc.get_W_dot_gross_ND
(ms_params.m_T_htf_hot_ref,
T_degC,
m_dot_htf_ND); //[kWe]
double q_dot_htf = m_q_dot_design*mc_user_defined_pc.get_Q_dot_HTF_ND
(ms_params.m_T_htf_hot_ref,
T_degC,
m_dot_htf_ND); //[MWt]
eta = P_cycle / 1.E3 / q_dot_htf;
if( w_dot_condenser != 0 )
*w_dot_condenser = mc_user_defined_pc.get_W_dot_cooling_ND(
ms_params.m_T_htf_hot_ref,
T_degC,
m_dot_htf_ND )
*ms_params.m_W_dot_cooling_des;
}
return eta;
}
double C_pc_Rankine_indirect_224::get_efficiency_at_load(double load_frac, double *w_dot_condenser)
{
/*
Get cycle efficiency, assuming design point temperature operation
*/
double eta = std::numeric_limits<double>::quiet_NaN();
if( !ms_params.m_is_user_defined_pc )
{
double cp = mc_pc_htfProps.Cp( (ms_params.m_T_htf_cold_ref + ms_params.m_T_htf_hot_ref)/2. +273.15); //kJ/kg-K
//calculate mass flow [kg/hr]
double mdot = ms_params.m_P_ref /* kW */ / ( /*ms_params.m_eta_ref*/m_eta_adj * cp * (ms_params.m_T_htf_hot_ref - ms_params.m_T_htf_cold_ref) ) *3600.;
mdot *= load_frac;
//ambient calculations
// water_state wprop;
double Twet = calc_twet(ms_params.m_T_amb_des, 45, 1.01325e6);
//Call
double P_cycle, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_makeup, W_cool_par, f_hrsys, P_cond, T_cond_out,T_cold;
T_cond_out=T_cold=std::numeric_limits<double>::quiet_NaN();
RankineCycle(
//inputs
ms_params.m_T_amb_des+273.15, Twet+273.15, 101325., ms_params.m_T_htf_hot_ref, mdot, 2,
0., ms_params.m_P_boil, 1., m_F_wcMin, m_F_wcMax, T_cold,dT_cw_design,
//outputs
P_cycle, eta, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_makeup, W_cool_par, f_hrsys, P_cond, T_cond_out);
if( w_dot_condenser != 0 )
*w_dot_condenser = W_cool_par;
}
else
{
// User-defined power cycle model
// Calculate non-dimensional mass flow rate relative to design point
double m_dot_htf_ND = load_frac; //[-] Use design point mass flow rate
// Get ND performance at off-design ambient temperature
double P_cycle = ms_params.m_P_ref*mc_user_defined_pc.get_W_dot_gross_ND
(ms_params.m_T_htf_hot_ref,
ms_params.m_T_amb_des,
m_dot_htf_ND); //[kWe]
double q_dot_htf = m_q_dot_design*mc_user_defined_pc.get_Q_dot_HTF_ND
(ms_params.m_T_htf_hot_ref,
ms_params.m_T_amb_des,
m_dot_htf_ND); //[MWt]
eta = P_cycle / 1.E3 / q_dot_htf;
if( w_dot_condenser != 0 )
*w_dot_condenser = mc_user_defined_pc.get_W_dot_cooling_ND(
ms_params.m_T_htf_hot_ref,
ms_params.m_T_amb_des,
m_dot_htf_ND )
*ms_params.m_W_dot_cooling_des;
}
return eta;
}
double C_pc_Rankine_indirect_224::get_htf_pumping_parasitic_coef()
{
return ms_params.m_htf_pump_coef* (m_m_dot_design / 3600.) / (m_q_dot_design*1000.); // kWe/kWt
}
void C_pc_Rankine_indirect_224::call(const C_csp_weatherreader::S_outputs &weather,
C_csp_solver_htf_1state &htf_state_in,
const C_csp_power_cycle::S_control_inputs & inputs,
C_csp_power_cycle::S_csp_pc_out_solver &out_solver,
//C_csp_power_cycle::S_csp_pc_out_report &out_report,
const C_csp_solver_sim_info &sim_info)
{
// Increase call-per-timestep counter
// Converge() sets it to -1, so on first call this line will adjust it = 0
m_ncall++;
// Get sim info
double time = sim_info.ms_ts.m_time; //[s]
double step_sec = sim_info.ms_ts.m_step; //[s]
//int ncall = p_sim_info->m_ncall;
// Check and convert inputs
double T_htf_hot = htf_state_in.m_temp; //[C]
double m_dot_htf = inputs.m_m_dot; //[kg/hr]
double T_wb = weather.m_twet + 273.15; //[K], converted from C
int standby_control = inputs.m_standby_control; //[-] 1: On, 2: Standby, 3: Off
double T_db = weather.m_tdry + 273.15; //[K], converted from C
double P_amb = weather.m_pres*100.0; //[Pa], converted from mbar
int tou = sim_info.m_tou - 1; //[-], convert from 1-based index
//double rh = weather.m_rhum/100.0; //[-], convert from %
double m_dot_st_bd = 0.0;
double zenith = weather.m_solzen; //Solar zenith [deg] at mid-hour
double T_dp = weather.m_tdew + 273.15; //[K] Dewpoint temp, convert from C
double hour = (double)((int)(time / 3600.0) % 24); //Hour in solar time
double u = weather.m_wspd; //Wind speed [m/s]
bool is_dark = (zenith > 90); //boolean for if it is dark outside. =1 if dark out.
bool is_two_tank = (mc_two_tank_ctes.ms_params.m_ctes_type == 2); //boolean for cold storage type
bool is_stratified = (mc_two_tank_ctes.ms_params.m_ctes_type >2);
bool is_waterloop = (mc_radiator.ms_params.m_field_fl == 3); //If circulating fluid in radiator is water.
double W_radpump = 0; //[MW] To include pumping for radiative cooling field
if (ms_params.m_CT == 4)
{
if (is_two_tank) //If two tank cold storage
{
m_dot_warm_avail = mc_two_tank_ctes.get_hot_massflow_avail(step_sec); //[kg/sec] Get maximum flow rate possible from warm tank if drained to minimum height
m_dot_cold_avail = mc_two_tank_ctes.get_cold_massflow_avail(step_sec); //[kg/sec] Get maximum flow rate possible from cold tank if drained to minimum height
T_warm_prev_K = mc_two_tank_ctes.get_hot_temp(); // Get previous warm temperature [K]
T_cold_prev_K = mc_two_tank_ctes.get_cold_temp(); // Get previous cold temperature [K]
T_cold_prev = mc_two_tank_ctes.get_cold_temp() - 273.15; // Get previous cold temperature [C]
dT_cw_design = mc_two_tank_ctes.ms_params.dT_cw_rad; //Cooling condenser cooling water design temperature drop
m_dot_radfield = mc_two_tank_ctes.ms_params.m_dot_cw_cold; //Total flow through hx on storage side which connects to radiative field.
}
if (is_stratified) //If stratified cold storage
{
m_dot_warm_avail = mc_stratified_ctes.get_hot_massflow_avail(step_sec); //[kg/sec] Get maximum flow rate possible from warm tank if drained to minimum height
m_dot_cold_avail = mc_stratified_ctes.get_cold_massflow_avail(step_sec); //[kg/sec] Get maximum flow rate possible from cold tank if drained to minimum height
T_warm_prev_K = mc_stratified_ctes.get_hot_temp(); // Get previous warm temperature [K]
T_cold_prev_K = mc_stratified_ctes.get_cold_temp(); // Get previous cold temperature [K]
T_cold_prev = mc_stratified_ctes.get_cold_temp() - 273.15; // Get previous cold temperature [C]
dT_cw_design = mc_stratified_ctes.ms_params.dT_cw_rad; //Cooling condenser cooling water design temperature drop
m_dot_radfield = mc_stratified_ctes.ms_params.m_dot_cw_cold; //Total flow through hx on storage side which connects to radiative field.
}
m_dot_condenser = std::numeric_limits<double>::quiet_NaN(); //condenser mass flow rate at actual load
m_dot_radact = std::numeric_limits<double>::quiet_NaN();
idx_time = static_cast<int>((time / 3600-1)); //Zero based index to this timestep based on end of current hour in seconds.
T_s_measured=mc_radiator.T_S_measured[idx_time]; //Get measured sky temperature [K]
if (T_s_measured != 0)
{
T_s_K = T_s_measured; //Use measured sky temp if available [K]
}
else
{
T_s_K = CSP::skytemp(T_db, T_dp, hour); //Use sky temp from correlation in [K]
}
}//radiative cooling and cold storage setup
double P_cycle, eta, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_water_cooling, W_cool_par, f_hrsys, P_cond, T_cond_out, T_rad_out;
int radcool_cntrl=0;
P_cycle = eta = T_htf_cold = m_dot_demand = m_dot_htf_ref = m_dot_water_cooling = W_cool_par = f_hrsys = P_cond = T_cond_out=T_rad_out= std::numeric_limits<double>::quiet_NaN();
// 4.15.15 twn: hardcode these so they don't have to be passed into call(). Mode is always = 2 for CSP simulations
int mode = 2;
double demand_var = 0.0;
double q_dot_htf = std::numeric_limits<double>::quiet_NaN(); //[MWt]
double time_required_su = 0.0;
m_standby_control_calc = standby_control;
double q_startup = 0.0;
bool was_method_successful = true;
switch(standby_control)
{
case STARTUP:
{
double c_htf = mc_pc_htfProps.Cp(physics::CelciusToKelvin((T_htf_hot + ms_params.m_T_htf_cold_ref) / 2.0)); //[kJ/kg-K]
double time_required_su_energy = m_startup_energy_remain_prev / (m_dot_htf*c_htf*(T_htf_hot - ms_params.m_T_htf_cold_ref)/3600); //[hr]
double time_required_su_ramping = m_startup_time_remain_prev; //[hr]
double time_required_max = fmax(time_required_su_energy, time_required_su_ramping);
double time_step_hrs = step_sec / 3600.0; //[hr]
if( time_required_max > time_step_hrs )
{
time_required_su = time_step_hrs; //[hr]
m_standby_control_calc = STARTUP; //[-] Power cycle requires additional startup next timestep
q_startup = m_dot_htf*c_htf*(T_htf_hot - ms_params.m_T_htf_cold_ref)*time_step_hrs/3600.0; //[kW-hr]
}
else
{
time_required_su = time_required_max; //[hr]
m_standby_control_calc = ON; //[-] Power cycle has started up, next time step it will be ON
double q_startup_energy_req = m_startup_energy_remain_prev; //[kWt-hr]
double q_startup_ramping_req = m_dot_htf*c_htf*(T_htf_hot - ms_params.m_T_htf_cold_ref)*m_startup_time_remain_prev/3600.0; //[kWt-hr]
q_startup = fmax(q_startup_energy_req, q_startup_ramping_req); //[kWt-hr]
// ******************
}
m_startup_time_remain_calc = fmax(m_startup_time_remain_prev - time_required_su, 0.0); //[hr]
m_startup_energy_remain_calc = fmax(m_startup_energy_remain_prev - q_startup, 0.0); //[kWt-hr]
}
q_dot_htf = q_startup/1000.0 / (time_required_su); //[kWt-hr] * [MW/kW] * [1/hr] = [MWt]
// *****
P_cycle = 0.0;
eta = 0.0;
T_htf_cold = ms_params.m_T_htf_cold_ref;
// *****
m_dot_demand = 0.0;
m_dot_water_cooling = 0.0;
W_cool_par = 0.0;
f_hrsys = 0.0;
P_cond = 0.0;
m_dot_st_bd = 0.0;
if (ms_params.m_CT == 4) // only if radiative cooling is chosen
{
if (is_two_tank)
{
mc_two_tank_ctes.idle(step_sec, T_db, mc_two_tank_ctes_outputs); //idle cold storage tanks ARD
T_cond_out = mc_two_tank_ctes_outputs.m_T_hot_ave - 273.15; //Return warm tank temperature if no heat rejection [C]
T_rad_out = mc_two_tank_ctes_outputs.m_T_cold_ave; //Return cold tank temperature if radiator off [K]
}
if (is_stratified)
{
mc_stratified_ctes.idle(step_sec, T_db, mc_stratified_ctes_outputs); //idle
T_cond_out = mc_stratified_ctes_outputs.m_T_hot_ave - 273.15; //Return warm tank temperature if no heat rejection [C]
T_rad_out = mc_stratified_ctes_outputs.m_T_cold_ave; //Return cold tank temperature if radiator off [K]
}
radcool_cntrl = 10;
}
was_method_successful = true;
break;
case ON:
if( !ms_params.m_is_user_defined_pc )
{
RankineCycle(T_db, T_wb, P_amb, T_htf_hot, m_dot_htf, mode, demand_var, ms_params.m_P_boil,
ms_params.m_F_wc[tou], m_F_wcMin, m_F_wcMax, T_cold_prev,dT_cw_design,
P_cycle, eta, T_htf_cold, m_dot_demand, m_dot_htf_ref, m_dot_water_cooling, W_cool_par, f_hrsys, P_cond, T_cond_out);
if (ms_params.m_CT == 4) // only if radiative cooling is chosen ARD
{
double T_rad_in = std::numeric_limits<double>::quiet_NaN(); //inlet to radiator [K]
double T_cond_in = std::numeric_limits<double>::quiet_NaN();
if (is_two_tank)
{
m_dot_condenser = f_hrsys * mc_two_tank_ctes.ms_params.m_dot_cw_rad; //calculate cooling water flow [kg/sec]
if (!is_dark) //day
{
if (m_dot_cold_avail > m_dot_condenser) //cold tank has sufficient mass for condenser flow
{
mc_two_tank_ctes.charge(step_sec, T_db, m_dot_condenser, T_cond_out + 273.15, T_cond_in, mc_two_tank_ctes_outputs);
T_rad_out = mc_two_tank_ctes_outputs.m_T_cold_ave; //Return cold tank temp [K] if radiator not on
radcool_cntrl = 20;
}
else //cold tank low
{
mc_two_tank_ctes.idle(step_sec, T_db, mc_two_tank_ctes_outputs); //Idle tank if not enough mass during day (should not happen if tank sized well)
T_rad_out = mc_two_tank_ctes_outputs.m_T_cold_ave; //Return cold tank temp [K] if radiator not on
radcool_cntrl = 999; //add error message here? Not cooling cycle!
}
} //end day
else //night
{
if (m_dot_cold_avail > (m_dot_condenser - m_dot_radfield)) //cold tank has sufficient mass for net of condenser flow and radiator field
{
if (m_dot_warm_avail > (m_dot_radfield - m_dot_condenser)) //warm tank has sufficient for net flow also
{
mc_radiator.night_cool(T_db, T_warm_prev_K, u, T_s_K, mc_radiator.ms_params.m_dot_panel,mc_radiator.ms_params.Np,m_dot_radfield, T_rad_out,W_radpump); //Call radiator to calculate temperature. Single series set of panels.
mc_two_tank_ctes.charge_discharge(step_sec, T_db, m_dot_condenser, T_cond_out + 273.15, m_dot_radfield, T_rad_out, mc_two_tank_ctes_outputs);
radcool_cntrl = 21;
}
else
{
mc_two_tank_ctes.charge(step_sec, T_db, m_dot_condenser, T_cond_out + 273.15, T_cond_in, mc_two_tank_ctes_outputs);
T_rad_out = mc_two_tank_ctes_outputs.m_T_cold_ave; //Return cold tank temp [K] if radiator not on
radcool_cntrl = 22;
}
}
else //rarely would cold not be sufficient because the net flow in charge-discharge is typically into cold
{
mc_radiator.night_cool(T_db, T_warm_prev_K, u, T_s_K, mc_radiator.ms_params.m_dot_panel, mc_radiator.ms_params.Np, m_dot_radfield, T_rad_out,W_radpump);
//mc_cold_storage.idle(step_sec, T_db, mc_cold_storage_outputs); //Idle tank if not enough mass during day (should not happen if tank sized well)
mc_two_tank_ctes.discharge(step_sec, T_db, m_dot_radfield, T_rad_out, T_rad_in, mc_two_tank_ctes_outputs);
radcool_cntrl = 998;
//throw error? not cooling power cycle!
}
}//end night
}//end two tank controls
if (is_stratified)
{
m_dot_condenser = f_hrsys * mc_stratified_ctes.ms_params.m_dot_cw_rad; //calculate cooling water flow [kg/sec]
if (!is_dark) //day