Class: `Ethane`

Description

The Ethane class represents the properties and constants for Ethane (C₂H₆).
It provides physical and thermodynamic properties required in process engineering simulations and calculations.

Properties

name (string): Ethane
formula (string): C₂H₆
molecular_weight (float): 30.07 g/mol

Class Reference

class Ethane()

Parameters:
* temperature: Temperature, default = Temperature(25,"C")
* pressure: Pressure, default = Pressure(1,"atm")
* density: Density, default = None
* specific_heat: SpecificHeat, default = None
* viscosity: Viscosity, default = None
* thermal_conductivity: ThermalConductivity, default = None
* vapor_pressure: Pressure, default = None
* enthalpy: HeatOfVaporization, default = None

Methods

The properties of the Ethane class are calculated using the following methods, inherited from the base Component class.

phase(): Detects the phase of the substance ("gas" or "liquid") by comparing the system temperature and vapor pressure. (At standard conditions, ethane is a gas.)
density():
Gas Phase: Uses the Ideal Gas Law
Liquid Phase: Uses DIPPR or experimental correlation
specific_heat():
Gas Phase: Ideal-gas heat capacity (Cp), DIPPR Eq. 107 with the constants of Perry's Chemical Engineers' Handbook, 8th ed., Table 2-156
Liquid Phase: Perry's Table 2-153, Eq. (2), a function of reduced temperature
viscosity():
Gas Phase: Uses Sutherland’s Law
Liquid Phase: Uses DIPPR correlation
thermal_conductivity():
Gas Phase: Vapor thermal conductivity (k), DIPPR Eq. 102 with the constants of Perry's 8th ed., Table 2-314
Liquid Phase: Polynomial function of temperature (Perry's Table 2-315)
vapor_pressure(): Calculates vapor pressure (Pvap) using an Antoine-type correlation
enthalpy(): Calculates the enthalpy of vaporization (ΔHvap) using a correlation based on reduced temperature

Examples

from processpi.components import Ethane
from processpi.units import *

c2h6 = Ethane(temperature=Temperature(25, "C"))
print(c2h6.density().to("kg/m3"))
print(c2h6.viscosity().to("Pa·s"))
print(c2h6.specific_heat().to("J/kgK"))
print(c2h6.thermal_conductivity().to("W/mK"))
print(c2h6.vapor_pressure().to("Pa"))
print(c2h6.enthalpy().to("J/kg"))

Class: Ethane