z-units 0.1.2

A simple unit converter for chemical engineering

z-units

A simple unit-converter for chemical engineers

Feature

• Gauge pressure (MPag, kPag, psig, ...) can be used
• Friendly to HYSYS user

Install

pip install z-units

Usage

from z_units import quantity as q
# pick a quantity
f = q.MolarFlow(3)
# to base unit
f.to_base()
# convert
f.to('kmol/s')
# list available units
print(f.units)
# get value
value, unit = f.value, f.unit
# gauge pressure
p = q.Pressure(5, 'bar').to('MPag')
# change local atmospheric pressure (default: 101325 Pa)
from z_units import config
config.set_local_atmospheric_pressure(50e3)
q.Pressure(100, 'kPa').to('kPag')
# change standard temperature (default: 20 degC)
# affect standard cubic meter "Sm**3"
config.set_standard_temperature(15)
q.Substance(100, 'Nm3').to('Sm3')
# formatting
# with unit in styles, format spec starts with "u"
format(q.MolarEntropy(100), 'u')
# '100 kJ/kmol-C' (quick-style)
format(q.MolarEntropy(100), 'up')
# '100 kJ/(kmol*C)' (expression-style)

Predefined Quantities

• Length
• Area
• Volume
• Time
• Mass
• Force
• Substance
• Energy
• Velocity
• Temperature
• DeltaTemperature
• Pressure
• VolumeFlow
• MassDensity
• HeatFlow
• MolarFlow
• MassFlow
• MolarDensity
• MolarHeatCapacity
• MolarEntropy
• MolarHeat
• ThermalConductivity
• Viscosity
• SurfaceTension
• MassHeatCapacity
• MassEntropy
• MassHeat
• StandardGasFlow
• KinematicViscosity
• MolarVolume
• Fraction
• Dimensionless