triple

All data and methods for estimating a chemical’s triple point.

References

1(1,2)

Staveley, L. A. K., L. Q. Lobo, and J. C. G. Calado. “Triple-Points of Low Melting Substances and Their Use in Cryogenic Work.” Cryogenics 21, no. 3 (March 1981): 131-144. doi:10.1016/0011-2275(81)90264-2.

thermosteam.properties.triple.triple_point_temperature(CASRN, method='Any')[source]

Return a chemical’s triple point temperature. Lookup is based on CASRNs. Automatically select a data source to use if no Method is provided. Return None if the data is not available.

Parameters

CASRN (string) – CASRN [-].

Returns

Tt – Triple point temperature [K].

Return type

float

Other Parameters

Method (string, optional) – The method name to use. The only accepted method for now is ‘Staveley’. If method is “Any”, the first available value from these methods will returned. If method is “All”, a dictionary of method results will be returned.

Notes

Returns data from 1. Median difference between melting points and triple points is 0.02 K. Accordingly, this should be more than good enough for engineering applications.

Temperatures are on the ITS-68 scale.

Examples

Ammonia

>>> triple_point_temperature('7664-41-7')
195.47999999999999
thermosteam.properties.triple.triple_point_pressure(CASRN, method='Any')[source]

Return a chemical’s triple point pressure. Lookup is based on CASRNs. Automatically select a data source to use if no Method is provided. Return None if the data is not available.

Parameters

CASRN (string) – CASRN [-]

Returns

Pt – Triple point pressure [Pa].

Return type

float

Other Parameters

Method (string, optional) – The method name to use. The only accepted method for now is ‘Staveley’. If method is “Any”, the first available value from these methods will returned. If method is “All”, a dictionary of method results will be returned.

Notes

Returns data from 1.

Examples

Ammonia

>>> triple_point_pressure('7664-41-7')
6079.5