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exported necessary COPI_0000101
Centrifugal Compressor
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000101
Generated onGerado em 2026-04-13
Natural Language DefinitionDefinição em Linguagem Natural
EN
A centrifugal compressor is a compressor that uses one or more centrifugal impellers to accelerate gas through radial flow and generate pressure increase by centrifugal action.
PT-BR
Um compressor centrífugo é um compressor que usa um ou mais impelidores centrífugos para acelerar o gás através de fluxo radial e gerar aumento de pressão por ação centrífuga.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every centrifugal compressor is a compressor that has component part at all times some centrifugal impeller and participates in some radial flow pattern.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (CentrifugalCompressor(x) → Compressor(x) ∧ ∃f (CompressionFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: CompressionFunction]∀f (CompressionFunction(f) → ∀p (realizedIn(f,p) → CompressionProcess(p)) ∧ ∃p (CompressionProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Structural differentia (necessary only)]∀x (CentrifugalCompressor(x) → ∃hasComponentPartAtAllTimes.CentrifugalImpeller ⊓ ∃participatesIn.RadialFlowPattern) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡) [Necessary part: CentrifugalCompressorCasing]∀x (CentrifugalCompressor(x) → ∃p (CentrifugalCompressorCasing(p) ∧ hasComponentPartAtAllTimes(x,p))) — Step 4: mereological commitment — every instance must have this part [Process participation signature]∀x ∀f ((CentrifugalCompressor(x) ∧ CompressionFunction(f) ∧ bearerOf(x,f)) → ∃m (GasPortion(m) ∧ participatesIn(m,f)) ∧ ∃e (GasPortion(e) ∧ participatesIn(e,f)) ∧ processType(f,PressureIncrease)) — Step 5: typed participants in the realising process
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: CentrifugalCompressor <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 "1.1.0-104-g4d16eff" ; 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 "2026-07-13"^^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 :CompressionFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :CompressionProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :CompressionProcess ] ; rdfs:label "compression function"@en ; rdfs:label "função de compressão"@pt-br . ### Process type :CompressionProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "compression process"@en ; rdfs:label "processo de compressão"@pt-br . :CompressionProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :GasPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :GasPortion ] . ### Equipment universal: CentrifugalCompressor :CentrifugalCompressor rdf:type owl:Class ; rdfs:subClassOf :Compressor ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :CompressionFunction ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasComponentPartAtAllTimes ; owl:someValuesFrom :CentrifugalCompressorCasing ] ; rdfs:label "centrifugal compressor"@en ; rdfs:label "compressor centrífugo"@pt-br ; iof-av:naturalLanguageDefinition "A centrifugal compressor is a compressor that uses one or more centrifugal impellers to accelerate gas through radial flow and generate pressure increase by centrifugal action."@en ; skos:definition "A centrifugal compressor is a compressor that uses one or more centrifugal impellers to accelerate gas through radial flow and generate pressure increase by centrifugal action."@en ; iof-av:naturalLanguageDefinition "Um compressor centrífugo é um compressor que usa um ou mais impelidores centrífugos para acelerar o gás através de fluxo radial e gerar aumento de pressão por ação centrífuga."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every centrifugal compressor is a compressor that has component part at all times some centrifugal impeller and participates in some radial flow pattern."@en ; iof-av:firstOrderLogicAxiom "∀x (CentrifugalCompressor(x) → Compressor(x) ∧ ∃i(CentrifugalImpeller(i) ∧ hasComponentPartAtAllTimes(x,i)) ∧ ∃p(RadialFlowPattern(p) ∧ participatesIn(x,p)))"@en ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "Using necessary conditions for this constructive type because under OWA, any equipment with a centrifugal impeller could be incorrectly classified as a standard centrifugal compressor, including specialized hybrid equipment or multi-stage systems that contain centrifugal elements but should not be forced into this maintenance category. Domain expert validation needed to confirm structural differentia is sufficient."@en ; :CentrifugalCompressorCasing rdf:type owl:Class ; rdfs:subClassOf iof-core:Assembly ; rdfs:label "invólucro"@pt-br ; rdfs:label "centrifugal compressor casing"@en .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
CompressionFunction ⊑ DesignedFunction
Realized in
CompressionProcess ⊑ PlannedProcess
Reusing the existing CompressionFunction from the enriched compressor class. All compressor types share this identity-giving function of increasing gas pressure through mechanical work.
2 Genus DeterminationDeterminação do Gênero
Compressorbfo:Object (BFO_0000030)
From parent_candidates, Compressor is the most specific and appropriate superclass. It is already enriched in our ontology with CompressionFunction and Assembly root. Centrifugal compressor is clearly a subtype of compressor distinguished by mechanism, not function.
3 Differentia SpecificaDiferença Específica
∃hasComponentPartAtAllTimes.CentrifugalImpeller ⊓ ∃participatesIn.RadialFlowPattern

Uses one or more centrifugal impellers that accelerate gas through radial flow and generate pressure increase by centrifugal action.

The differentia captures the two essential distinguishing features from all definitions: (1) the physical mechanism of centrifugal impellers, and (2) the radial flow pattern through these impellers. This distinguishes centrifugal compressors from all other compressor types while being minimal and non-redundant with the genus.
4 Necessary PartsPartes Necessárias
Part classParentRelation
CentrifugalCompressorCasingAssemblyhasComponentPartAtAllTimes
These three parts are essential for any centrifugal compressor to function: impellers for acceleration, casing for containment and flow guidance, and shaft for rotation.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'GasPortion', 'count': 1, 'constraints': 'lower pressure, compressible fluid'}
OutputsSaídas
{'type': 'GasPortion', 'count': 1, 'constraints': 'higher pressure, same composition'}
TransformationTransformação
mechanical energy transferred to gas via centrifugal action, increasing pressure and temperature
Single gas stream input/output with pressure increase through mechanical work - consistent with compression function signature but delivered via centrifugal mechanism.
MetadataMetadados
COPI IDCOPI IDCOPI_0000101
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000101
StatusStatusexported
Axiom modeModonecessary
CreatedCriado2026-04-13
UpdatedAtualizado2026-06-25
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
ISA 5.1-2022 — wikimedia/compressor_centrifugal.svg
Quick factsDados rápidos
GenusGêneroCompressor
Root classClasse raizAssembly
Axiom modeModonecessary
FunctionFunçãoCompressionFunction
ProcessProcessoCompressionProcess
PartsPartes1
Source DefinitionsDefinições nas Fontes 3 sources
ISO 15926-4 CENTRIFUGAL COMPRESSOR
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
CFIHOS centrifugal compressor
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POSC Caesar Centrifugal Compressor
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