OEO Ontology

Overview / Open Energy Ontology / Class - coal
Label: coal
Definition:
Coal is a portion of matter consisting of combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.

Sub classes:
hard coal
view
Definition:
Hard coal is coal with a gross calorific value greater than 23 865 kJ/kg (5 700 kcal/kg) on an ashfree but moist basis and with a mean random reflectance of vitrinite of at least 0,6.

lignite
view
Definition:
Lignite is coal that is non-agglomerating with a gross calorific value less than 17 435 kJ/kg (4 165 kcal/kg) and greater than 31 % volatile matter on a dry mineral matter free basis.

sub bituminous coal
view
Definition:
Sub bituminous coal is coal that is non-agglomerating with a gross calorific value between 17 435 kJ/kg (4 165 kcal/kg) and 23 865 kJ/kg (5 700 kcal/kg) containing more than 31 % volatile matter on a dry mineral matter free basis.

Back to the super classes:
portion of matter
view
Definition:
A portion of matter is an aggregate of material entities that have a state of matter.

Editor note:
Portions of matter describe mass nouns like e.g. water, air and fuel. Mass nouns are uncountable, but portions of these can be quantified, like 1 glass of water, 1 m³ of air or 1 barrel of fuel. For further explanation please refer to: https://github.com/OpenEnergyPlatform/ontology/wiki/Explanation-on-mass-nouns