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HEAT COLUMN [11 records]

Record 1 2026-01-23

English

Subject field(s)
  • Geothermal Energy
  • Air Conditioning and Heating
CONT

There is an alternative between closed-and open-loop systems called standing column wells(SCWs). In a SCW, groundwater is pumped from the base of a deep well and directed to a heat exchanger.... A SCW consists of a long borehole mostly drilled in the bedrock and filled with groundwater... Typical installations use a PVC [polyvinyl chloride] pipe almost as long as the well within which a submersible pump is installed. In a conventional SCW, groundwater is pumped at the bottom of the well through a PVC pipe and returned below the dynamic level in the annular space of the borehole via a rejection pipe.... Before reinjecting the groundwater into the SCW, part of the flow rate can be diverted into a separate injection well. This process is called "bleed" and improves the system performance by attracting water from the undisturbed neighbouring ground through aquifer fractures. The bleed induces heat transfer by advection..., which improves significantly the thermal efficiency of the SCW.

Key term(s)
  • standing-column well

French

Domaine(s)
  • Énergie géothermique
  • Conditionnement de l'air et chauffage
CONT

Le fonctionnement des PCP repose sur l'utilisation de l'eau souterraine comme fluide caloporteur. L'eau est généralement prélevée à proximité de la surface à l'aide d'une pompe submersible et réinjectée à la base du puits. [...] Afin d'améliorer l'efficacité thermique des PCP en période de pointe, un procédé communément appelé «saignée» peut être employé. Cette méthode consiste à purger le PCP d'un faible pourcentage du débit de circulation, afin de stimuler un écoulement souterrain convergent vers le puits. Ce faisant, le renouvellement de l'eau contenue dans le PCP permet de stabiliser rapidement la température du fluide caloporteur à l'approche de la thermopompe.

Spanish

Save record 1

Record 2 2020-01-08

English

Subject field(s)
  • Fires and Explosions
DEF

An updraft of heated air, fire gases, and smoke directly above the involved fire area.

CONT

Elevated streams are sometimes used to extinguish sparks and flying embers from a burning building or to cool the thermal column of heat over a building...

French

Domaine(s)
  • Feux et explosions
DEF

Courant ascendant d'air chaud, de gaz de combustion et de fumée directement au-dessus de la zone de l'incendie.

CONT

Des jets de lance surélevés sont parfois utilisés pour éteindre les étincelles et les tisons ardents provenant d'un bâtiment en feu ou pour refroidir la colonne thermique au-dessus d'un bâtiment […]

Spanish

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Record 3 2011-05-31

English

Subject field(s)
  • Analytical Chemistry
DEF

A chromatographic technique in which a temperature gradient is produced.

OBS

Thermochromatography is an alternative to temperature programming.

OBS

The heat source is passed down a column in the mobile phase flow direction.

Key term(s)
  • temperature gradient analysis

French

Domaine(s)
  • Chimie analytique

Spanish

Campo(s) temático(s)
  • Química analítica
Save record 3

Record 4 2010-06-10

English

Subject field(s)
  • Grain Growing
  • Milling and Cereal Industries
  • Drying Techniques (Farming)
DEF

A mechanical device which is used to remove excessive moisture from harvested grain usually by forcing unheated air through the grain.

CONT

Heat applied to grain during drying causes moisture inside the kernel to move to the surface where it is evaporated into the surrounding air, thus reducing moisture content in the kernel. Two basic types of grain driers have traditionally been used in terminals : the rack drier and the column drier. As well, new types such as concurrent, counterflow, and the microwave, have recently been introduced to the industry.

French

Domaine(s)
  • Culture des céréales
  • Minoterie et céréales
  • Dessiccation (Techniques agricoles)
DEF

Matériel indépendant permettant d'abaisser rapidement la teneur en eau d'une masse de grains - trop humide pour qu'une simple ventilation séchante suffise - par l'action d'un fort courant d'air relativement chaud, la source de chaleur étant un brûleur.

CONT

Quand le grain est chauffé pendant le séchage, l'humidité qu'il renferme se déplace vers l'enveloppe d'où elle s'évapore. Les silos utilisent traditionnellement deux principaux types de séchoirs : le séchoir à chicanes et le séchoir à colonne. En outre, de nouveaux types de séchoirs, à circulation parallèle directe, à circulation parallèle inverse et à micro-ondes, ont récemment fait leur apparition.

Spanish

Campo(s) temático(s)
  • Cultivo de cereales
  • Molinería y cereales
  • Desecación (Técnicas agrícolas)
CONT

Los granos oleaginosos, tienen que ser almacenados a humedades aún menores, 10 a 11%, y todavía más bajas, como en el caso de la calza. Así para conseguir la humedad adecuada del grano se utilizan las secadoras de granos. Al empezar la temporada la secadora debe estar lista para trabajar. Esto significa en primer lugar la limpieza total de la torre de secado. Si no se hiciera así, no sería difícil que se observaran bajos rendimientos de la máquina, debido a menores cantidades de agua evaporadas en el aire usado.

Save record 4

Record 5 2006-01-26

English

Subject field(s)
  • Anti-pollution Measures
CONT

Amine Sweetening Process... Rich amine is heated by hot regenerated lean amine in the heat exchanger. Rich amine is then further heated in the regeneration still column, by heat supplied from the reboiler. The steam rising through the still liberates H2S and CO2 and therefore regenerates the amine. Steam and acid gases separated from the rich amine are condensed and cooled, respectively, in the reflux condenser. Condensed steam is separated in the reflux accumulator and returned to the still. Acid gases may be flared or directed to an acid gas recovery system.

French

Domaine(s)
  • Mesures antipollution
CONT

Accumulateur de reflux : Le produit CO2 est disponible sous forme de gaz pur à 99.99% (sur base sèche), saturé d'eau et à une pression positive.

Spanish

Save record 5

Record 6 2006-01-26

English

Subject field(s)
  • Anti-pollution Measures
CONT

Lean/rich exchanger: Sensible heat from the lean amine is used to heat incoming rich amine to maximize heat recovery.

CONT

In the MEA [mono-ethanol amine] process... the gases go to the absorption column where the carbon dioxide binds to the solvent chemically. Most of the CO2 is thus removed from the exhaust gas that is released to the atmosphere and the reach solution(i. e. the solution containing the absorbed CO2) flows to a lean/rich heat exchanger : here the hot lean solution, coming from the stripper column(regenerator), cools itself giving out its heat to the rich solution, which then goes to the regenerator.

Key term(s)
  • lean rich heat exchanger
  • lean rich exchanger
  • lean-rich exchanger
  • lean rich amine exchanger
  • lean-rich amine exchanger
  • lean/rich amine heat exchanger
  • lean-rich amine heat exchanger
  • lean rich amine heat exchanger

French

Domaine(s)
  • Mesures antipollution
CONT

Échangeur de chaleur amine pauvre-riche: La chaleur sensible de l'amine pauvre est utilisée pour chauffer l'amine riche afin de maximiser la récupération de chaleur.

OBS

Composant du système de captage CO2 de Cansolv Technologies inc.

Key term(s)
  • échangeur de chaleur amine pauvre riche

Spanish

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Record 7 2001-11-08

English

Subject field(s)
  • Industrial Techniques and Processes
  • Printed Circuits and Microelectronics
DEF

The heating element in a eutectic die bonder or wire bonder used to bring the substrate up to the bonding temperature.

French

Domaine(s)
  • Techniques industrielles
  • Circuits imprimés et micro-électronique

Spanish

Save record 7

Record 8 1999-04-06

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
CONT

Cloud formation makes the convection process visible. An unstable atmospheric column will lead to updrafts. If the air below is moist, the updraft will lead to condensation into droplets. The condensation process accelerates the updraft owing to the release of latent heat. Examples are the various types of cumulus clouds(e. g., cumulus, cumulus congestus, cumulonimbus).

OBS

condensation. Phase transition from gas to liquid, accompanied by release of heat. In meteorology, condensation (the opposite of evaporation) usually refers to the method by which water vapor becomes a liquid.

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
CONT

Pour que le nuage se développe encore, les étages moyen et supérieur de la troposphère doivent être instables. La chaleur latente libérée par le processus de condensation va accroître cette instabilité en réchauffant l'air ascendant.

Spanish

Save record 8

Record 9 1998-01-26

English

Subject field(s)
  • Brewing and Malting
  • Industrial Tools and Equipment
DEF

A tank for the temporary storage of a substance.

CONT

The beer is moved from the fermentor to a holding tank called a beer well.

CONT

The wash or beer is fed continuously from a storage tank or well through a heater, in which it absorbs heat from the ascending spirit vapors, to a distilling column consisting of perforated plates.

French

Domaine(s)
  • Brasserie et malterie
  • Outillage industriel
DEF

Bassin [...] où un liquide peut s'accumuler, être garder en réserve.

CONT

Lorsqu'on a réuni ainsi une quantité de moût suffisant pour mettre en levain, les résidus sont brassés à l'eau chaude et on soutire de même et ainsi de suite jusqu'à ce qu'on ait complètement épuisé le malt de toutes ses parties solubles. Ces métiers faibles sont pompés dans des bacs à réserves.

Spanish

Save record 9

Record 10 1995-07-04

English

Subject field(s)
  • Meteorology
  • Atmospheric Physics
DEF

The spatial displacement of a centre of low pressure caused by the local redistribution of mass in the atmosphere. The trajectory of the centre is often altered by heating or cooling of the air column. This can result from thermal fluxes at the surface or latent heat transformations associated with cloud formation and precipitation. These processes change the temperature distribution in the air column, resulting in density changes which modify the surface pressures.

French

Domaine(s)
  • Météorologie
  • Physique de l'atmosphère
DEF

Déplacement spatial d'un centre de basse pression causé par la redistribution locale de la masse de l'atmosphère. La trajectoire du centre est souvent modifiée par le réchauffement ou le refroidissement de la colonne d'air, dû aux flux thermiques de surface ou aux transformations de la chaleur latente associées à la formation de nuages et de précipitation. Ces processus affectent la distribution de température de la colonne d'air et de ce fait modifient les pressions de surface.

Spanish

Campo(s) temático(s)
  • Meteorología
  • Física de la atmósfera
DEF

Desplazamiento espacial de un centro de baja presión causado por la redistribución local de la masa en la atmósfera. La trayectoria del centro está a menudo modificada por el calentamiento o el enfriamiento de la columna de aire debidos a los flujos térmicos de superficie o a las transformaciones del calor latente asociadas a la formación de nubes y de precipitación. Esos procesos cambian la distribución de la temperatura en la columna de aire y por ello modifican las presiones superficiales.

Save record 10

Record 11 1986-03-27

English

Subject field(s)
  • Semiconductors (Electronics)
  • Industrial Techniques and Processes
CONT

In most metallic [solar collector] systems, especially those using a number of metals or a reactive metal such as aluminum, the heat transfer fluid can have a significant impact on corrosion. In aqueous solutions, the concentration of dissolved chemicals, heavy metal ions, and pH of the fluid must be controlled. Deionized or demineralized water has been used successfully but additional steps are usually taken. These include the use of a gettering column to trap heavy metal ions before they enter critical parts of the system and inhibitors which stabilize the metal ions and reduce their reaction with less noble metals.

French

Domaine(s)
  • Semi-conducteurs (Électronique)
  • Techniques industrielles

Spanish

Save record 11

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