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WO2002004872A2 - Residential heating and industrial drying technique - Google Patents

Residential heating and industrial drying technique Download PDF

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Publication number
WO2002004872A2
WO2002004872A2 PCT/IB2001/001271 IB0101271W WO0204872A2 WO 2002004872 A2 WO2002004872 A2 WO 2002004872A2 IB 0101271 W IB0101271 W IB 0101271W WO 0204872 A2 WO0204872 A2 WO 0204872A2
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WO
WIPO (PCT)
Prior art keywords
air
cold air
industrial drying
temperature
drying technique
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2001/001271
Other languages
French (fr)
Other versions
WO2002004872A3 (en
Inventor
Libère Nitunga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NDAYIKENGURUKIYE GODEFROID
Niyonizigiye Deogratias
INNOVIS INTERNATIONAL
Original Assignee
NDAYIKENGURUKIYE GODEFROID
Niyonizigiye Deogratias
INNOVIS INTERNATIONAL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NDAYIKENGURUKIYE GODEFROID, Niyonizigiye Deogratias, INNOVIS INTERNATIONAL filed Critical NDAYIKENGURUKIYE GODEFROID
Priority to AU2001272687A priority Critical patent/AU2001272687A1/en
Publication of WO2002004872A2 publication Critical patent/WO2002004872A2/en
Publication of WO2002004872A3 publication Critical patent/WO2002004872A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/90—Preservation of foods or foodstuffs, in general by drying or kilning; Subsequent reconstitution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/16—Wood, e.g. lumber, timber

Definitions

  • a waste of energy The energy coming from the heat source (radiator for example) essentially serves to heat the upper space which is not "inhabited", whereas generally the objective sought is rather to heat the space limited to a height of approximately 2 m.
  • the new technique of distributing heat in any room heated elsewhere consists in raising the cold air which is naturally found at the level of the floor, to deposit it above the hot air which is found naturally at the level of the ceiling, for more or less closed vertical circuit operation.
  • the heat source (existing or to be installed) can be inserted in the air lift pipe, in particular to do without the fan, if the draft thus created is sufficient to maintain the operation in closed circuit. It is also possible to carry out a variant of the process, by sending directly to the heat source, the cold air collected in the lower layers.
  • Figure 1 illustrates an application of the new technique in the drying of large wood.
  • the wood to be dried (2) is placed in the drying cell (1). Whatever the location of the heat source, the hot air rises and becomes blocked in the upper part of the dryer, and the cold air descends and occupies the lowest layers, in particular in the cold air collector ( 3).
  • the conduct of cold air ascent (4) houses a modest power fan (5), which circulates the air in a vertical closed circuit.
  • this type of dryer seeks to make maximum use of the temperature factor to cause the migration of internal water to the periphery of the wood, while seeking a low drying gradient by maintaining a consequent hygroscopic state.
  • the air circulates between the parts to be dried at a very low speed; its essential role is to distribute the heat contained in the dryer as fairly as possible. Hatches for the saturated air outlet and the fresh air inlet allow to evacuate the excess humidity inside the dryer.
  • the cold air pipe (4) passes outside the drying cell only for a better illustration of the technique. This configuration can nevertheless be retained, partially or entirely, when it is desired to heat the air leaving the collector with a source arranged outside the dryer.
  • FIG. 2 illustrates an application of the new technique in residential heating.
  • the radiator (6) heats a room equipped with a work table and a bed.
  • the fan can operate continuously or intermittently if it is connected to the mains via a time switch.
  • FIG. 3 shows a particular case where the cold air pipe brings the latter under the radiator (8), in a box (10) open at the upper face, for a somewhat closed circuit operation.
  • a small fan may or may not be necessary to ensure good air circulation.
  • FIG. 3 shows two very elegant implementations of the new technique, incorporating it in a straight halogen lamp (11) on the one hand, and in a coat rack (12) on the other.
  • the air lift tube is easily integrated into the residential environment and the device can be incorporated in a halogen or fluorescent lamp post, in a coat rack etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention concerns a technique for distributing heat to provide uniformity of temperature in residential and commercial heating systems, as well as for industrial drying. Said technique consists in collecting cool air which is naturally located at floor level, and conveying it above the hot air which is naturally located at ceiling level.

Description

UNE TECHNIQUE DE CHAUFFAGE RESIDENTIEL ET DE SECHAGE INDUSTRIEL RESIDENTIAL HEATING AND INDUSTRIAL DRYING TECHNOLOGY

DESCRIPTION Situation antérieureDESCRIPTION Previous situation

Dans un local ou toute enceinte chauffée, le phénomène de convection naturelle fait que l'air chaud cherche à occuper les couches supérieures parce que sa densité est inférieure à celle de l'air froid. De la sorte on arrive à des écarts de température importants entre la couche d'air la plus élevée et la couche d'air la plus basse d'un même local : de l'ordre de 5°C dans les appartements résidentiels, et de l'ordre de 15°C dans les surfaces commerciales. Cette situation entraîne les conséquences suivantes :In a room or any heated enclosure, the phenomenon of natural convection causes hot air to seek to occupy the upper layers because its density is lower than that of cold air. In this way we arrive at significant temperature differences between the highest air layer and the lowest air layer of the same room: of the order of 5 ° C in residential apartments, and around 15 ° C in commercial areas. This situation has the following consequences:

- Un gaspillage d'énergie : L'énergie provenant de la source de chaleur (radiateur par exemple) sert essentiellement à chauffer l'espace supérieur qui n'est pas «habité», alors que généralement l'objectif recherché est plutôt de chauffer l'espace limité à une hauteur d'environ 2 m.- A waste of energy: The energy coming from the heat source (radiator for example) essentially serves to heat the upper space which is not "inhabited", whereas generally the objective sought is rather to heat the space limited to a height of approximately 2 m.

- Une grande perte d'énergie : La presque totalité des déperditions d'énergie dans les systèmes de chauffage se fait par conduction, notamment en fonction de l'amplitude de l'écart entre température intérieure et la température extérieure. En élevant inutilement la température qui règne au niveau du plafond, on augmente les pertes de chaleur vers l'extérieur.- A great loss of energy: Almost all of the energy loss in heating systems occurs by conduction, in particular as a function of the amplitude of the difference between indoor temperature and outdoor temperature. By unnecessarily raising the temperature prevailing at the level of the ceiling, heat losses to the outside are increased.

Face à cette situation, on observe plusieurs attitudes : i) Ne rien faire ii) Utilisation des brasseurs d'air ou des ventilo-convecteurs, avec les inconvénients suivants :Faced with this situation, there are several attitudes: i) Do nothing ii) Use of air mixers or fan coil units, with the following drawbacks:

. Inconfort dû à la création de courants d'air importants.. Discomfort due to the creation of large drafts.

. Consommation énergétique élevée (ventilateurs puissants) ;. High energy consumption (powerful fans);

. Manque d'efficacité ; l'air chaud continue à remonter ; iii) Utilisation des recycleurs d'air, souvent caractérisés par une absence d'efficience et d'efficacité.. Lack of efficiency; hot air continues to rise; iii) Use of air recyclers, often characterized by a lack of efficiency and effectiveness.

Solution apportée par la présente inventionSolution provided by the present invention

La nouvelle technique de répartition de la chaleur dans tout local chauffé par ailleurs, consiste à remonter l'air froid qui se retrouve naturellement au niveau du plancher, pour le déposer au-dessus de l'air chaud qui lui se retrouve naturellement au niveau du plafond, pour un fonctionnement en circuit vertical plus ou moins fermé.The new technique of distributing heat in any room heated elsewhere, consists in raising the cold air which is naturally found at the level of the floor, to deposit it above the hot air which is found naturally at the level of the ceiling, for more or less closed vertical circuit operation.

La source de chaleur (existante ou à installer) peut être insérée dans la conduite de remontée d'air, afin notamment de se passer du ventilateur, si le tirage ainsi créé est suffisant pour entretenir le fonctionnement en circuit fermé. Il est également possible de réaliser une variante du procédé, en envoyant directement sur la source de chaleur, l'air froid collecté dans les couches inférieures.The heat source (existing or to be installed) can be inserted in the air lift pipe, in particular to do without the fan, if the draft thus created is sufficient to maintain the operation in closed circuit. It is also possible to carry out a variant of the process, by sending directly to the heat source, the cold air collected in the lower layers.

La figure 1 illustre une application de la nouvelle technique dans le séchage du bois de grandes dimensions.Figure 1 illustrates an application of the new technique in the drying of large wood.

Le bois à sécher (2) est disposé dans la cellule de séchage (1). Quel que soit l'emplacement de la source de chaleur, l'air chaud monte et se bloque dans la partie supérieure du séchoir, et l'air froid descend et occupe les couches les plus basses, notamment dans le collecteur d'air froid (3). La conduite de remontée de l'air froid (4) abrite un ventilateur de puissance modeste (5), qui assure la circulation de l'air en circuit fermé vertical.The wood to be dried (2) is placed in the drying cell (1). Whatever the location of the heat source, the hot air rises and becomes blocked in the upper part of the dryer, and the cold air descends and occupies the lowest layers, in particular in the cold air collector ( 3). The conduct of cold air ascent (4) houses a modest power fan (5), which circulates the air in a vertical closed circuit.

Pour le séchage du bois de grandes dimensions, ce type de séchoir cherche à faire jouer au maximum le facteur température pour provoquer la migration de l'eau interne vers la périphérie du bois, tout en recherchant un gradient de séchage faible par le maintient d'un état hygroscopique conséquent. Ainsi, l'air circule entre les pièces à sécher à une vitesse très faible ; son rôle essentiel est de répartir le plus équitablement possible, la chaleur contenue dans le séchoir. Des trappes pour la sortie d'air saturé et l'entrée d'air frais permettent d'évacuer l'excédent d'humidité à l'intérieur du séchoir.For the drying of large woods, this type of dryer seeks to make maximum use of the temperature factor to cause the migration of internal water to the periphery of the wood, while seeking a low drying gradient by maintaining a consequent hygroscopic state. Thus, the air circulates between the parts to be dried at a very low speed; its essential role is to distribute the heat contained in the dryer as fairly as possible. Hatches for the saturated air outlet and the fresh air inlet allow to evacuate the excess humidity inside the dryer.

Sur cette figure 1 , la conduite d'air froid (4) passe à l'extérieur de la cellule de séchage uniquement pour une meilleure illustration de la technique. Cette configuration peut néanmoins être retenue, partiellement ou intégralement, lorsque l'on veut chauffer l'air sortant du collecteur avec une source disposée à l'extérieur du séchoir.In this figure 1, the cold air pipe (4) passes outside the drying cell only for a better illustration of the technique. This configuration can nevertheless be retained, partially or entirely, when it is desired to heat the air leaving the collector with a source arranged outside the dryer.

La figure 2 illustre une application de la nouvelle technique dans le chauffage résidentiel. Le radiateur (6) chauffe une pièce équipée d'une table de travail et d'un lit. On dispose un collecteur d'air froid (7), une conduite (8), un ventilateur de puissance modeste (9), comparable à celui qui est utilisé dans les ordinateurs du type PC. Le ventilateur peut fonctionner en continu ou par intermittence s'il est branché au secteur via un interrupteur horaire.Figure 2 illustrates an application of the new technique in residential heating. The radiator (6) heats a room equipped with a work table and a bed. There is a cold air collector (7), a pipe (8), a fan of modest power (9), comparable to that which is used in computers of the PC type. The fan can operate continuously or intermittently if it is connected to the mains via a time switch.

La figure 3 montre un cas particulier où la conduite d'air froid amène ce dernier sous le radiateur (8), dans un caisson (10) ouvert à la face supérieure, pour un fonctionnement en circuit quelque peu fermé.FIG. 3 shows a particular case where the cold air pipe brings the latter under the radiator (8), in a box (10) open at the upper face, for a somewhat closed circuit operation.

En fonction de la température du radiateur et de la section de la conduite d'air, un petit ventilateur peut être nécessaire ou pas, en vue d'assurer une bonne circulation de l'air.Depending on the temperature of the radiator and the cross-section of the air duct, a small fan may or may not be necessary to ensure good air circulation.

La même figure 3 montre deux mises en œuvre très élégantes de la nouvelle technique, en l'incorporant dans un lampadaire droit à halogène (11) d'une part, et dans un portemanteaux (12) d'autre part.The same figure 3 shows two very elegant implementations of the new technique, incorporating it in a straight halogen lamp (11) on the one hand, and in a coat rack (12) on the other.

Avantages de l'inventionAdvantages of the invention

1° Une grande efficacité : l'écart de température entre les couches d'air hautes et les couches d'air basses diminue très sensiblement et rapidement.1 ° High efficiency: the temperature difference between the upper air layers and the lower air layers decreases very noticeably and quickly.

2° Un grand confort : absence totale de courant d'air.2 ° Great comfort: total absence of drafts.

3° Une importante économie d'énergie : un dispositif simple suffit pour élever la température de 2°C dans la zone «habitable », dans une pièce d'environ 20 m2. Sa propre consommation en énergie électrique est faible parce qu'il utilise un petit ventilateur d'une puissance de l'ordre de dix Watt (10 W).3 ° Significant energy savings: a simple device is enough to raise the temperature by 2 ° C in the "habitable" area, in a room of around 20 m 2 . Its own consumption of electrical energy is low because it uses a small fan with a power of the order of ten Watt (10 W).

4° Un faible niveau sonore4 ° A low noise level

5° Discrétion : Le tube de remontée d'air s'intègre facilement dans l'environnement résidentiel et le dispositif peut être incorporé dans un lampadaire à halogène ou fluorescent, dans un portemanteaux etc. 5 ° Discretion: The air lift tube is easily integrated into the residential environment and the device can be incorporated in a halogen or fluorescent lamp post, in a coat rack etc.

Claims

REVENDICATIONS 1. Un procédé de répartition de la chaleur pour uniformiser la température dans tout local ou enceinte chauffée par ailleurs, qui consiste à collecter l'air froid qui se retrouve naturellement en bas, pour l'envoyer au-dessus de l'air chaud qui, lui, se retrouve naturellement en haut.1. A process of heat distribution to standardize the temperature in any room or enclosure heated elsewhere, which consists in collecting the cold air which is found naturally at the bottom, to send it above the hot air which , it is found naturally at the top. 2. Procédés de chauffage constituant des cas particuliers du procédé selon la revendication 1 , qui consistent notamment à collecter l'air froid et à l'envoyer directement sur la source de chaleur ; à insérer une source de chaleur après le collecteur d'air froid, notamment pour bénéficier d'un tirage important qui peut conduire à la suppression du ventilateur de remontée de l'air froid, etc. 2. Heating methods constituting particular cases of the method according to claim 1, which consist in particular of collecting cold air and sending it directly to the heat source; to insert a heat source after the cold air collector, in particular to benefit from a large draft which can lead to the suppression of the fan for raising the cold air, etc.
PCT/IB2001/001271 2000-07-11 2001-07-09 Residential heating and industrial drying technique Ceased WO2002004872A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001272687A AU2001272687A1 (en) 2000-07-11 2001-07-09 Residential heating and industrial drying technique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BI6300 2000-07-11
BI756/63 2000-07-11

Publications (2)

Publication Number Publication Date
WO2002004872A2 true WO2002004872A2 (en) 2002-01-17
WO2002004872A3 WO2002004872A3 (en) 2002-04-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/001271 Ceased WO2002004872A2 (en) 2000-07-11 2001-07-09 Residential heating and industrial drying technique

Country Status (2)

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AU (1) AU2001272687A1 (en)
WO (1) WO2002004872A2 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB509220A (en) * 1938-07-15 1939-07-12 Henri Moreau Improvements in or relating to lamps for diffusing conditioned air
US3827342A (en) * 1973-10-11 1974-08-06 G Hughes Air circulating device
FR2275734A1 (en) * 1974-06-20 1976-01-16 Chauffage Ste Indle Air conditioning system - draws cold air in at bottom and discharges it at top
US3973479A (en) * 1975-06-23 1976-08-10 Whiteley Isaac C Floor-ceiling air circulating device
US4184415A (en) * 1978-07-14 1980-01-22 General Connector Corporation Air circulation apparatus
FR2486211A1 (en) * 1980-07-01 1982-01-08 Lambert Francois Hot air redistribution system for room - uses fan in vertical channel against wall to oppose natural convection and create more uniform temp. distribution
US4344112A (en) * 1980-10-06 1982-08-10 Brown Robert L Environmental lamp
GB2114283B (en) * 1982-01-30 1986-07-16 Peter Ashworth Webb Space heating
AT396034B (en) * 1991-03-12 1993-05-25 Muehlboeck Kurt DRYING SYSTEM WITH CROSS VENTILATION, ESPECIALLY FOR WOOD

Also Published As

Publication number Publication date
AU2001272687A1 (en) 2002-01-21
WO2002004872A3 (en) 2002-04-11

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