exported
equivalent
gas turbine
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Gasturbine
Generated on 2026-04-15
Natural Language Definition
EN
A gas turbine is a turbine that has an integrated compressor and combustion chamber, designed to compress ambient air, mix it with fuel for combustion, and expand the resulting hot gases through a turbine section to generate mechanical power.
PT-BR
Uma turbina a gás é uma turbina que possui um compressor e câmara de combustão integrados, projetada para comprimir ar ambiente, misturá-lo com combustível para combustão, e expandir os gases quentes resultantes através de uma seção de turbina para gerar energia mecânica.
Formal Axioms
Semi-formal (Aristotelian)
Every gas turbine is a turbine that has component parts compressor and combustion chamber at all times, and participates in air compression process and fuel combustion process.
First-Order Logic Theory
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▸ Stored override
∀x(GasTurbine(x) ↔ Turbine(x) ∧ ∃c,h(Compressor(c) ∧ CombustionChamber(h) ∧ hasComponentPartAtAllTimes(x,c) ∧ hasComponentPartAtAllTimes(x,h)) ∧ ∃p1,p2(AirCompressionProcess(p1) ∧ FuelCombustionProcess(p2) ∧ participatesIn(x,p1) ∧ participatesIn(x,p2)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: GasTurbine
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000680 rdf:type owl:Class ; # TurbomachineryPowerGenerationFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000681 # TurbomachineryPowerGenerationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000681 # TurbomachineryPowerGenerationProcess
] ;
rdfs:label "turbomachinery power generation function"@en ;
rdfs:label "função de geração de energia por turbomáquina"@pt-br .
### Process type
:COPI_0000681 rdf:type owl:Class ; # TurbomachineryPowerGenerationProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "turbomachinery power generation process"@en ;
rdfs:label "processo de geração de energia por turbomáquina"@pt-br .
:COPI_0000681 # TurbomachineryPowerGenerationProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000386 # PortionOfAir
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000393 # FuelPortion
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000394 # ExhaustGas
] .
### Equipment universal: GasTurbine
:COPI_0000286 rdf:type owl:Class ; # GasTurbine
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000366 # Turbine
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000680 # TurbomachineryPowerGenerationFunction
]
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000679 # TurbineSection
]
)
] ;
rdfs:label "gas turbine"@en ;
rdfs:label "turbina a gás"@pt-br ;
iof-av:naturalLanguageDefinition "A gas turbine is a turbine that has an integrated compressor and combustion chamber, designed to compress ambient air, mix it with fuel for combustion, and expand the resulting hot gases through a turbine section to generate mechanical power."@en ;
skos:definition "A gas turbine is a turbine that has an integrated compressor and combustion chamber, designed to compress ambient air, mix it with fuel for combustion, and expand the resulting hot gases through a turbine section to generate mechanical power."@en ;
iof-av:naturalLanguageDefinition "Uma turbina a gás é uma turbina que possui um compressor e câmara de combustão integrados, projetada para comprimir ar ambiente, misturá-lo com combustível para combustão, e expandir os gases quentes resultantes através de uma seção de turbina para gerar energia mecânica."@pt-br ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000059 ] ;
skos:definition "[ISO 15926-4] A <GAS TURBINE> is a <TURBINE> that compresses air which is then mixed with fuel for combustion and expansion through a turbine section to generate relatively high power output for either mechanical drive or power generation"@en ;
skos:definition "[CFIHOS] A turbine that compresses air which is then mixed with fuel for combustion and expansion through a turbine section to generate relatively high power output for either mechanical drive or power generation."@en ;
skos:definition "[POSC Caesar] A turbine that compresses air which is then mixed with fuel for combustion and expansion through a turbine section to generate relatively high power output for either mechanical drive or power generation."@en .
:COPI_0000679 rdf:type owl:Class ; # TurbineSection
rdfs:subClassOf iof-core:Assembly ;
rdfs:label "seção de turbina"@pt-br ;
rdfs:label "turbine section"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
TurbomachineryPowerGenerationFunction
⊑ DesignedFunction
Realized in
TurbomachineryPowerGenerationProcess
⊑ PlannedProcess
Gas turbines are fundamentally defined by their function to generate mechanical power through the turbomachinery process of air compression, fuel combustion, and thermal expansion through a turbine section. This distinguishes them from other power generation equipment like reciprocating engines (internal combustion cycles) or steam turbines (external steam cycles).
2
Genus Determination
Turbine
Based on the parent_candidates from ISO 15926, 'TURBINE' is the most specific appropriate superclass. Gas turbines are a subtype of turbine that uses gas as the working fluid. The broader 'Rotating Equipment' category is too general. Turbine represents the appropriate level of ontological specificity as the immediate superclass that captures the turbomachinery nature while allowing differentiation from steam turbines, hydraulic turbines, etc.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| TurbineSection | Assembly | hasComponentPartAtAllTimes |
These parts represent the essential components that every gas turbine must possess to function: air compression, fuel combustion, thermal expansion, and power transmission capabilities.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfAir
— ambient pressure
FuelPortion
— gas, light oil, medium oil, heavy oil, or dual fuel
Outputs (O)
ExhaustGas
— high temperature, reduced pressure
Transformation (T)
chemical energy conversion to thermal energy via combustion, then thermal energy conversion to mechanical rotational energy via gas expansion
Gas turbines take ambient air and fuel as inputs, combust them to create high-energy gases, then extract mechanical work as the gases expand through the turbine section while exhausting spent gases.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Cross-Standard Observations
All three sources (ISO 15926, CFIHOS, POSC Caesar) provide nearly identical definitions, emphasizing the air compression, fuel combustion, and turbine expansion sequence. The consistency across standards reinforces the functional identity of gas turbines. ISO 14224 properties provide operational context (fuel types, power ratings, operating profiles) that support the functional classification.
