Units

class thermochem.units.Enthalpy(data)

Class that models an enthalpy measure with conversion utilities

Supported units are

• Joule per kg (default)
• Kilojoule per kg (kJkg)
• Kilocalorie per kg (kcalkg)
• BTU per pound (Btulb)

>>> h = Enthalpy(1000)
>>> h.kJkg
1.0
>>> h.kcalkg
0.2390057361376...
>>> h.Btulb
0.42992261392949266

Btulb

Convert enthalpy to BTU per pound

kJkg

Convert enthalpy to kilojoules per kg

kcalkg

Convert enthalpy to kilocalories per kg

unit(units='si')

Specify enthalpy units, default is joules per kg.

Unit one of:

‘si’: joules per kg ‘kJkg’: kilojoules per kg ‘kcalkg’: kilocalories per kg ‘Btulb’: BTU per pound

class thermochem.units.Length(data)

Class that models a length measure with conversion utilities

Supported units are

• meter (default)
• millimeter (mm)
• inch (inch)
• foot (ft)

>>> l = Length(1).unit('inch')
>>> round(l.mm, 1)
25.4
>>> l.ft
0.0833333333333...
>>> round(l, 4)
0.0254

ft

Convert length to feet

inch

Convert length to inches

mm

Convert length to millimeters

unit(units='m')

Specify length units, default is meters (m).

Unit one of ‘m’, ‘mm’, ‘inch’, ‘ft’.

class thermochem.units.Massflow(data)

Class that models a mass flow measure with conversion utilities

Supported units are

• kg per second (default)
• kg per hour (kgh)
• pounds per second (lbs)
• pounds per hour (lbh)

kgh

Convert mass flow to kg per hour

lbh

Convert mass flow to pounds per hour

lbs

Convert mass flow to pounds per second

unit(units='kgs')

Specify mass flow units, default is kg per second.

Unit one of:

‘kgs’: kg per second ‘kgh’: kg per hour ‘lbs’: pounds per second ‘lbh’: pounds per hour

class thermochem.units.Massflowrate(data)

Class that models a mass flow measure with conversion utilities

Supported units are

• \(\frac{kg}{s\ m^2}\) (default)
• \(\frac{lb}{s\ ft^2}\) (Btu)

class thermochem.units.Pressure(data)

Class that models a Pressure measure with conversion utilities

Suported units are

• Pascal (Pa)
• Mega Pascal (MPa)
• Bar (bar)
• Pound per square inch (psi)
• Atmosphere (atm)
• Millimeters of water column (mmwc)
• Torricelli (torr)

Normal instantiation is pressure in Pa. How much is an athmosphere?

>>> p = Pressure(1.0).unit('atm')
>>> p
101325.0
>>> p.torr
760.0
>>> p.mmwc
10285.839999999998
>>> p.psi
14.69594877551345

MPa

Convert pressure to megapascals

atm

Convert pressure to atmospheres (atm)

bar

Convert pressure to bars

mmwc

Convert pressure to millimeters of water column (mmwc)

psi

Convert pressure to pounds per square inch (psi)

torr

Convert pressure to torrs

unit(units='Pa')

Specify pressure units, default is Pascal (Pa).

Unit one of ‘Pa’, ‘MPa’, ‘bar’, ‘psi’, ‘atm’, ‘mmwc’, ‘torr’.

class thermochem.units.Temperature(data)

Class that models a temperature measure with conversion utilities

Supported units are

• Kelvin
• Celsius
• Fahrenheit

Normal instantiation is a temperature in Kelvin

>>> T = Temperature(100)
>>> T
100.0

But you can instantiate and specify if unit is Celsius or Fahrenheit

>>> T = Temperature(100).unit('F')
>>> T
310.92777777777775

Unit conversion is as easy as it gets.

>>> T.C
37.777777777777...
>>> T.F
99.999999999999...

You can compute with temperatures because inherits from the float built-in

>>> T1 = Temperature(200)
>>> T2 = Temperature(0).unit('C')
>>> round(T1+T2, 2)
473.15

If you don’t want to use the class’ attribute you can use the function getattr to get a value using the unit code.

>>> getattr(T,'C')
37.77777777777...

C

Convert temperature to Celsius

F

Convert temperature to Fahrenheit

unit(units='K')

Specify temperature units, default is Kelvin.

Unit one of ‘K’, ‘C’, or ‘F’ for Kelvin, Celsius, or Fahrenheit