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NATURAL CONVECTION [3 records]
Record 1 - external organization data 2005-12-19
Record 1, English
Record 1, Subject field(s)
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 1, Main entry term, English
- natural convection 1, record 1, English, natural%20convection
Record 1, Abbreviations, English
Record 1, Synonyms, English
- thermosyphoning 1, record 1, English, thermosyphoning
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Natural convection, also called thermosyphoning, does not produce high flow. It cannot remove full power heat, but is adequate to remove decay heat. Natural convection occurs when cool D2O in the boiler tubes falls by gravity into the core. It displaces the hot, less dense D2O surrounding the fuel. The boilers cool the fluid pushed into them from the fuel channels, and it becomes more dense. The liquid that falls into the core expands on heating and becomes less dense. Thermosyphoning continues as long as the boilers continue to remove heat. 1, record 1, English, - natural%20convection
Record 1, French
Record 1, Domaine(s)
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 1, Main entry term, French
- convexion naturelle
1, record 1, French, convexion%20naturelle
feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- thermosiphonage 1, record 1, French, thermosiphonage
masculine noun
- phénomène de thermosiphon 1, record 1, French, ph%C3%A9nom%C3%A8ne%20de%20thermosiphon
masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
La convexion naturelle, appelée également thermosiphonage, ne produit pas de débit élevé. Elle ne permet pas d'évacuer la chaleur à pleine puissance, mais convient pour évacuer la chaleur de désintégration. La convexion naturelle se produit lorsque le D2O froid dans les tubes des générateurs de vapeur tombe par gravité dans le coeur. Il déplace le D2O chaud et moins dense qui entoure le combustible. Les générateurs de vapeur refroidissent le fluide en provenance des canaux de combustible, et celui-ci devient plus dense. Le liquide qui tombe dans le coeur se dilate lors du chauffage et devient moins dense. Le thermosiphonage continue tant que les générateurs de vapeur évacuent la chaleur. 1, record 1, French, - convexion%20naturelle
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2003-11-06
Record 2, English
Record 2, Subject field(s)
- Thermodynamics
- Heating
Record 2, Main entry term, English
- natural convection
1, record 2, English, natural%20convection
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- free convection 2, record 2, English, free%20convection
correct
- gravitational convection 3, record 2, English, gravitational%20convection
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
... the result of air's lower density at elevated temperatures and its affinity to rise. Cooler air sinks due to the increase in density. 4, record 2, English, - natural%20convection
Record number: 2, Textual support number: 1 OBS
Convection. Process of heat [(transfer of heat)] carried from one point to another by movement of a liquid or a gas (i.e., air). Natural convection is caused by expansion of the liquid or gas when heated. Expansion reduces the density of the medium, causing it to rise above the cooler, more dense portions of the medium. Gravity heating systems are examples of the profitable use of natural convection. The air, heated by the furnace, becomes less dense (consequently lighter) and rises, distributing heat to the various areas of the house without any type of blower. When a blower is used, the heat transfer method is called "forced convection." 5, record 2, English, - natural%20convection
Record 2, French
Record 2, Domaine(s)
- Thermodynamique
- Chauffage
Record 2, Main entry term, French
- convection naturelle
1, record 2, French, convection%20naturelle
correct, see observation, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- convexion libre 2, record 2, French, convexion%20libre
correct, feminine noun
- convection gravitationnelle 3, record 2, French, convection%20gravitationnelle
feminine noun
- convection propre 3, record 2, French, convection%20propre
feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Dans la convection libre (ou naturelle), le mouvement est dû à la seule action de la pesanteur, lorsque des différences de masse volumique provenant de différences de température rompent l'équilibre hydrostatique. 2, record 2, French, - convection%20naturelle
Record number: 2, Textual support number: 1 OBS
La convection, qui est un mouvement ascendant et descendant des molécules d'un fluide subissant un réchauffement, est l'un des trois phénomènes de la transmission de la chaleur entre deux corps (ou fluides) à températures différentes. 4, record 2, French, - convection%20naturelle
Record number: 2, Textual support number: 2 OBS
natural convection; convection naturelle : termes utilisés entre autre dans le domaine du chauffage. 5, record 2, French, - convection%20naturelle
Record 2, Key term(s)
- convexion gravitationnelle
- convexion propre
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Termodinámica
- Calefacción
Record 2, Main entry term, Spanish
- convección natural
1, record 2, Spanish, convecci%C3%B3n%20natural
correct, feminine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Convección debida a una diferencia de densidades entre diferentes partes de un fluido. 2, record 2, Spanish, - convecci%C3%B3n%20natural
Record 3 - internal organization data 2003-10-09
Record 3, English
Record 3, Subject field(s)
- Meteorology
- Thermodynamics
- Fluid Mechanics and Hydraulics (Physics)
Record 3, Main entry term, English
- free convection
1, record 3, English, free%20convection
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- natural convection 2, record 3, English, natural%20convection
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
Convection caused by density differences within the air. 3, record 3, English, - free%20convection
Record number: 3, Textual support number: 1 CONT
Free convection is the rising of heated air and the sinking of cooler air without the need of external forces. 4, record 3, English, - free%20convection
Record number: 3, Textual support number: 2 CONT
Convection ... is a principal means of energy transfer. Distinction is made between free convection (gravitational or buoyant convection), motion caused only by density differences within the fluid; and forced convection, motion induced by mechanical forces such as deflection by a large-scale surface irregularity, turbulent flow caused by friction at the boundary of a fluid, or motion caused by any applied pressure gradient. Free and forced convection are not necessarily exclusive processes. On a windy day with overcast sky, the heat exchange between ground and air is an example of forced convection. On a sunny day with a little wind where the ground temperature rises, both kinds of convection take place. 5, record 3, English, - free%20convection
Record 3, French
Record 3, Domaine(s)
- Météorologie
- Thermodynamique
- Mécanique des fluides et hydraulique (Physique)
Record 3, Main entry term, French
- convection libre
1, record 3, French, convection%20libre
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- convection naturelle 2, record 3, French, convection%20naturelle
feminine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Convection provoquée par des différences de densité de l'air. 1, record 3, French, - convection%20libre
Record number: 3, Textual support number: 1 CONT
[La] convection naturelle [...] est causée par le réchauffement diurne de la surface terrestre, résultant souvent en la formation de nuages Cumulus. 2, record 3, French, - convection%20libre
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Meteorología
- Termodinámica
- Mecánica de fluidos e hidráulica (Física)
Record 3, Main entry term, Spanish
- convección libre
1, record 3, Spanish, convecci%C3%B3n%20libre
correct, feminine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Convección producida por diferencias de densidad dentro del aire. 1, record 3, Spanish, - convecci%C3%B3n%20libre
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