Francis turbine
E442395
A Francis turbine is a widely used reaction water turbine designed for medium-head hydroelectric power generation, known for its high efficiency and suitability for large dams.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Francis turbine canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4466780 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Francis turbine Context triple: [Itaipu Dam, turbineType, Francis turbine]
-
A.
Kaplan turbines
Kaplan turbines are adjustable-blade water turbines commonly used in low-head hydroelectric power plants to efficiently generate electricity from large volumes of flowing water.
-
B.
Voith
Voith is a German multinational engineering company known for its technologies and services in sectors such as energy, paper, raw materials, and transportation.
-
C.
Olidan power station
Olidan power station is one of Sweden’s oldest large-scale hydroelectric power plants, located in Trollhättan and historically important for the country’s industrial electrification.
-
D.
Flix hydroelectric plant
The Flix hydroelectric plant is a hydroelectric power station located in the municipality of Flix in Catalonia, Spain, generating electricity from the flow of the Ebro River.
-
E.
Gravfoss power station
Gravfoss power station is a hydroelectric power plant located on the Drammenselva river in Norway, generating renewable electricity from the river’s flow.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Francis turbine Target entity description: A Francis turbine is a widely used reaction water turbine designed for medium-head hydroelectric power generation, known for its high efficiency and suitability for large dams.
-
A.
Kaplan turbines
Kaplan turbines are adjustable-blade water turbines commonly used in low-head hydroelectric power plants to efficiently generate electricity from large volumes of flowing water.
-
B.
Voith
Voith is a German multinational engineering company known for its technologies and services in sectors such as energy, paper, raw materials, and transportation.
-
C.
Olidan power station
Olidan power station is one of Sweden’s oldest large-scale hydroelectric power plants, located in Trollhättan and historically important for the country’s industrial electrification.
-
D.
Flix hydroelectric plant
The Flix hydroelectric plant is a hydroelectric power station located in the municipality of Flix in Catalonia, Spain, generating electricity from the flow of the Ebro River.
-
E.
Gravfoss power station
Gravfoss power station is a hydroelectric power plant located on the Drammenselva river in Norway, generating renewable electricity from the river’s flow.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
hydraulic machine
ⓘ
reaction turbine ⓘ water turbine ⓘ |
| application |
base-load power generation
ⓘ
grid-connected hydroelectric plants ⓘ |
| category |
mixed-flow water turbine
ⓘ
reaction water turbine ⓘ |
| commonInstallation | underground powerhouse caverns ⓘ |
| comparedTo |
Kaplan turbine
NERFINISHED
ⓘ
Pelton turbine NERFINISHED ⓘ |
| controlMethod | adjustable guide vanes ⓘ |
| designGoal | maximize efficiency over a range of heads and flows ⓘ |
| developedBy | James B. Francis NERFINISHED ⓘ |
| developmentPeriod | mid-19th century ⓘ |
| distinguishedFrom |
Kaplan turbine by using mixed-flow rather than axial-flow
ⓘ
Pelton turbine by operating at lower heads and higher flow ⓘ |
| drives | electric generator ⓘ |
| energyConversion | converts hydraulic energy to mechanical energy ⓘ |
| flowDirection |
axial at outlet
ⓘ
radial-inward at inlet ⓘ |
| fluid | water ⓘ |
| governing | speed regulation via wicket gate adjustment ⓘ |
| hasComponent |
draft tube
ⓘ
guide vanes ⓘ runner ⓘ spiral casing ⓘ stay vanes ⓘ |
| mounting | usually installed in a spiral or scroll casing ⓘ |
| namedAfter | James B. Francis NERFINISHED ⓘ |
| operatingPrinciple |
mixed-flow
ⓘ
reaction ⓘ |
| positionRelativeToTailrace | runner located above tailrace level with draft tube ⓘ |
| runnerType | mixed-flow runner ⓘ |
| suitableFor |
large flow rates
ⓘ
medium heads ⓘ |
| typicalEfficiency |
high efficiency
ⓘ
often above 90 percent ⓘ |
| typicalHeadRange |
approximately 10 to 300 meters
ⓘ
medium head ⓘ |
| usedFor |
hydroelectric power generation
ⓘ
large dam power stations ⓘ medium-head hydroelectric applications ⓘ |
| usedInCountry |
Brazil
ⓘ
Canada ⓘ China NERFINISHED ⓘ India NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Francis turbine Description of subject: A Francis turbine is a widely used reaction water turbine designed for medium-head hydroelectric power generation, known for its high efficiency and suitability for large dams.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.