92 lines
3.6 KiB
Python
92 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"""REFPROP-backed CO2 property helpers."""
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import ctREFPROP.ctREFPROP as ct
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class CO2PropertyCalculator():
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"""二氧化碳物性计算"""
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def __init__(self, refprop_path = None):
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"""初始化库"""
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self.rp = ct.REFPROPFunctionLibrary(refprop_path)
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# 设置流体文件
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self.rp.SETUPdll(1, 'CO2.FLD', 'HMX.BNC', 'DEF')
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# 设置单位
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self.rp.SETUPdll(2, 'SI', 'SI', 'DEF')
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self.z = [1.0]
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self.mw = self.rp.WMOLdll(self.z)
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def calculate_properties(self, T=None, P=None, h=None, s=None, include_transport=False):
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"""计算二氧化碳物性"""
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if T is not None and P is not None:
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# 已知Tp
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result = self.rp.TPFLSHdll(T, P, self.z)
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properties = {
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'T': T,
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'P': P,
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'h': result.h,
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's': result.s,
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}
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elif P is not None and h is not None:
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# 已知Ph
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result = self.rp.PHFLSHdll(P, h, self.z)
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properties = {
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'T': result.T,
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'P': P,
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'h': h,
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's': result.s,
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}
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elif T is not None and h is not None:
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# 已知Th
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result = self.rp.THFLSHdll(T, h, self.z)
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properties = {
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'T': T,
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'P': result.P,
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'h': h,
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's': result.s,
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}
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elif P is not None and s is not None:
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# 已知Ps
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result = self.rp.PSFLSHdll(P, s, self.z)
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properties = {
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'T': result.T,
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'P': P,
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'h': result.h,
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's': s,
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}
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else:
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raise ValueError("提供的参数不足")
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if result.ierr > 0:
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raise ValueError(f"REFPROP计算错误:{result.ierr}")
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# 补充提取的物性，这里由于后续还要使用，不进行参数变换
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properties['D'] = result.D
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properties['cp'] = result.Cp
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properties['cv'] = result.Cv,
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properties['rho'] = result.D * self.mw
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properties['cp_mass'] = result.Cp / self.mw * 1000.0
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properties['cv_mass'] = result.Cv / self.mw * 1000.0
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if include_transport:
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self._add_transport_properties(properties, result)
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return properties
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def _add_transport_properties(self, properties, result):
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"""Add CO2 transport properties needed by PCHE correlations."""
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transport = self.rp.TRNPRPdll(properties['T'], result.D, self.z)
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if getattr(transport, 'ierr', 0) > 0:
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raise ValueError(f"REFPROP transport calculation error:{transport.ierr}")
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viscosity_micro_pa_s = getattr(transport, 'eta', None)
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thermal_conductivity = getattr(transport, 'tcx', None)
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if viscosity_micro_pa_s is None:
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viscosity_micro_pa_s = getattr(transport, 'visc', None)
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if thermal_conductivity is None:
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thermal_conductivity = getattr(transport, 'tcond', None)
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if viscosity_micro_pa_s is None or thermal_conductivity is None:
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raise ValueError("REFPROP transport result missing viscosity or conductivity")
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viscosity_pa_s = viscosity_micro_pa_s * 1.0e-6
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properties['mu'] = viscosity_pa_s
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properties['viscosity'] = viscosity_pa_s
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properties['lambda'] = thermal_conductivity
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properties['thermal_conductivity'] = thermal_conductivity
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