NL2027064B1 - Greenhouse with carbon dioxide dosing installation - Google Patents
Greenhouse with carbon dioxide dosing installation Download PDFInfo
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- NL2027064B1 NL2027064B1 NL2027064A NL2027064A NL2027064B1 NL 2027064 B1 NL2027064 B1 NL 2027064B1 NL 2027064 A NL2027064 A NL 2027064A NL 2027064 A NL2027064 A NL 2027064A NL 2027064 B1 NL2027064 B1 NL 2027064B1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/18—Greenhouses for treating plants with carbon dioxide or the like
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
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Abstract
The invention relates to a greenhouse for cultivating crops therein, comprising multiple rows of support columns connected by transverse frames for forming a roof support construction; a fabric screen for at least 5 partially darkening and/or thermally shielding the greenhouse, wherein the fabric screen extends in a horizontal separation plane within the greenhouse that divides the greenhouse in a cultivation. space below the separation plane and a roof space above the separation 10 plane; and a carbon dioxide (C02) dosing installation for dosing carbon dioxide into at least the cultivation space, wherein the carbon dioxide dosing installation comprises a carbon dioxide source and a carbon dioxide circulating arrangement in fluid communication with the carbon dioxide 15 source and configured for receiving carbon dioxide from the carbon dioxide source and for displacing the received carbon dioxide and/or air within the cultivation space, wherein the carbon dioxide circulating arrangement is arranged within an upper part of the cultivation space.
Description
P139289NL00 Greenhouse with carbon dioxide dosing installation
BACKGROUND The invention relates to a greenhouse for cultivating crops therein with a carbon dioxide {CO:) dosing installation.
Such a greenhouse is known. The known greenhouse comprises multiple rows of support columns connected by transverse frames for forming a roof support construction, and a fabric screen for at least partially darkening and/or thermally shielding the greenhouse. The fabric screen extends in a horizontal separation plane within the greenhouse that divides the greenhouse in a cultivation space below the separation plane and a roof space above the separation plane. Multiple rows of crops are arranged next to each other within the cultivation space of the greenhouse, wherein each row of the multiple rows of crops is arranged within a cultivation gutter. The cultivation gutters are arranged just above the bottom of the greenhouse.
It is known that the crops need carbon dioxide in order to grow optimally. In order to promote growth of the crops arranged within the greenhouse, a carbon dioxide dosing installation is provided. The carbon dioxide dosing installation has a carbon dioxide source, for example, configured for burning natural gas, and a plurality of dosing tubes arranged between and below the cultivation gutters and in fluid communication with the carbon dioxide source. Each of the plurality of the dosing tubes, in particular the part thereof that is arranged between the cultivation gutters, is provided with a plurality of dosing openings arranged within the wall of the dosing tube. During use, carbon dioxide is transported from the carbon dioxide source towards the dosing tubes, from which the carbon dioxide is dosed into the cultivation space via the dosing openings.
SUMMARY OF THE INVENTION After each cultivation period, which is a period in which the crops are planted or sown, fully grown and harvested, the dosing tubes of the known carbon dioxide dosing installation have to be removed from the cultivation space and have to be replaced with new dosing tubes before a following cultivation period. The new dosing tubes has to be positioned very precisely with respect to the cultivation gutters, in particular the crops disposed therein, since the crops are very sensitive for receiving too much or too less carbon dioxide. The known carbon dioxide dosing installation has as a disadvantage that it is very time-consuming and cost-inefficient because of the dosing tubes that need to be replaced after each cultivation period.
It is an object of the present invention to ameliorate the disadvantages of the known greenhouse, to provide an improved greenhouse or to provide an alternative greenhouse.
According Lo a first aspect, the invention provides a greenhouse for «cultivating crops therein, comprising: multiple rows of support columns connected by transverse frames for forming a roof support construction; a fabric screen for at least partially darkening and/or thermally shielding the greenhouse, wherein the fabric screen extends in a horizontal separation plane within the greenhouse that divides the greenhouse in a cultivation space below the separation plane and a roof space above the separation plane; and a carbon dioxide (CO;) dosing installation for dosing carbon dioxide into at least the cultivation space, wherein the carbon dioxide dosing installation comprises a carbon dioxide source and a carbon dioxide circulating arrangement in fluid communication with the carbon dioxide source and configured for receiving carbon dioxide from the carbon dioxide source and for displacing the received carbon dioxide and/or air within the cultivation space, wherein the carbon dioxide circulating arrangement is arranged within an upper part of the cultivation space.
In the greenhouse according to the invention, the carbon dioxide circulating arrangement is arranged within the upper part of the cultivation space, which has to be understood as that the carbon dioxide circulating arrangement is arranged well above the crops disposed within the cultivation space of the greenhouse. Preferably, the carbon dioxide circulating arrangement is arranged at such height within the cultivation space, that people are enabled to walk freely through the greenhouse without being obstructed by the carbon dioxide circulating arrangement. During use, the carbon dioxide dosing installation is used for providing and displacing carbon dioxide to and within, respectively, the cultivation space, for example, when it is determined that the concentration of carbon dioxide within the cultivation space is too low. The carbon dioxide, thus, is introduced into the cultivation space at a height above the crops cultivated therein. When the carbon dioxide has been introduced into the cultivation space, the carbon dioxide will descend downwards due to having a higher specific mass than air and eventually will reach the crops cultivated within the cultivation space. Since the carbon dioxide circulating arrangement is arranged within the upper part of the cultivation space, the carbon dioxide circulating arrangement is prevented from causing any obstruction, for example, during harvesting cultivated crops from the cultivation space. Therefore, there is no need Lo remove the carbon dioxide circulating arrangement from the cultivation at the end of a cultivation period. It is advantageously possible to place new crops into the cultivation space in order to start a new cultivation period, as soon as the previous cultivation period has ended, without the need of installing new dosing tubes. The greenhouse according to the invention, therefore, has a less time-consuming and more cost-efficient carbon dioxide dosing installation.
An additional advantage may be that the amount of carbon dioxide reaching the crops within the cultivation space is increased with respect to the known greenhouse.
In an embodiment, the carbon dioxide circulating device 1s arranged at or near the horizontal separation plane within the greenhouse. An advantage of this embodiment is that the carbon dioxide circulating device is prevented from obstructing persons walking through the greenhouse.
It is noted that the carbon dioxide is introduced into the cultivation space relatively high, such that the time needed by the carbon dioxide to descend downward to the crops within cultivation space may enable the carbon dioxide to spread throughout the cultivation space. Advantageously, this may result in an equal or substantially equal spreading of the carbon dioxide within the cultivation space.
In an embodiment, the carbon dioxide dosing installation has one or more carbon dioxide supply ducts extending between the carbon dioxide source and the carbon dioxide circulating arrangement and configured for transporting carbon dioxide from the carbon dioxide source to the carbon dioxide «circulating arrangement. This embodiment has as an advantage that carbon dioxide is only introduced into the cultivation space of the greenhouse at desired positions.
In an embodiment, the carbon dioxide circulating arrangement comprises a ventilating device, wherein the 5 ventilating device has an inlet side, at which air is drawn into the ventilating device, and an outlet side, at which air is blown out of the ventilating device.
In an embodiment, the ventilating device comprises a fan, and an outlet of one of the one or more carbon dioxide supply ducts is arranged downstream of the fan at the inlet side thereof, such that carbon dioxide ejected from the outlet of the one of the one or more carbon dioxide supply ducts is drawn into the fan. In an embodiment thereof, the fan is arranged at a first height within the cultivation space, and the outlet of the one of the one or more carbon dioxide supply ducts is arranged at a second height within the cultivation space, wherein the second height is higher than the first height. Carbon dioxide has a specific mass, also known as volumetric mass density, which is higher than the specific mass of air. By introducing carbon dioxide directly downstream of the fan at the second height, the introduced carbon dioxide descends downwards along the inlet side of the fan. As a result, the carbon dioxide enters the suction flow of the fan and is drawn into the fan, in which the carbon dioxide is thoroughly mixed with air. Additionally, the fan may be used as a recirculating fan for recirculating air and carbon dioxide within the cultivation space, which advantageously may result in a more uniform concentration of carbon dioxide throughout the cultivation space.
In an embodiment, the carbon dioxide circulating arrangement comprises a ventilating device having a fan with an inlet side, at which air is drawn into the fan, and an outlet side, at which air is blown out of the fan, and an air blender arranged downstream of the fan and/or at the inlet side thereof, wherein the air blender comprises a blender housing with a first air inlet for receiving air from the roof space and/or from outside the greenhouse, a second air inlet for drawing in air from the cultivation space, an air outlet in fluid communication with the inlet side of the fan, and a blending space defined between the first air inlet, the second air inlet and the air outlet. In an embodiment thereof, one of the one or more carbon dioxide supply ducts is in fluid communication with the air blender and debouches into the blending space of the air blender, in particular directly downstream of the air outlet.
In an embodiment, the carbon dioxide dosing installation comprises a duct connector for connecting the one of the one or more carbon dioxide supply ducts to the air blender, wherein the duct connector has a T-shaped connector piece with a connector inlet connected to the respective carbon dioxide supply duct, a first connector outlet and a second connector outlet, opposite to the first connector outlet, wherein the first connector outlet is connected to a first side of the blender housing by means of a first connecting duct debouching into the blending space, and the second connector outlet is connected to a second side, opposite to the first side, of the blender housing by means of a second connecting duct debouching into the blending space. According to this embodiment, carbon dioxide is introduced into the blending space at opposite sides thereof and therewith at opposite sides of an air flow within the blending space. This advantageously contributes to a thorough mixing of air and carbon dioxide within the fan downstream of the air blender.
In an embodiment, the ventilating device comprises an air duct with an air duct inlet, an air duct outlet, and an air channel extending between the air duct inlet and the air duct outlet, wherein the air channel debouches into the air outside of the greenhouse via a roof passage, wherein the air channel passes through the separation plane, and wherein the ventilation device is arranged for drawing air into the air channel. When the screen in the greenhouse according to this embodiment is closed, the roof space comprises a stock of air having specific and well measurable conditions. As the air duct of passes through the separation plane and the roof space, fresh air may be drawn into the cultivation space without altering the conditions of the stock of air in the roof space. The cultivation space may thus be ventilated without influencing the conditions of the air in the roof space, or without the need of indirect reheating via the cultivation space, in combination with controlling the concentration of carbon dioxide within the cultivation space of the greenhouse.
In an embodiment, the ventilating device comprises a closing panel configured to move between a first position, in which the air channel is closed off, and a second position, in which air is allowed to pass through the air channel. In an embodiment thereof, the air duct comprises a further air inlet in the roof space, and a further closing panel that 1s configured to move between a third position, in which air is allowed to pass through the further air inlet, and a fourth position, in which the further air inlet is closed off, preferably wherein the closing panel and the further closing panel are operably connected to each other for synchronized movement.
In an embodiment, the greenhouse comprises a further carbon dioxide dosing arrangement comprising a further ventilating device having a further fan with a further inlet side, at which air is drawn into the further fan, and a further outlet side, at which air is blown out of the further fan, and a further air blender arranged downstream of the further fan and/or at the further inlet side thereof, wherein the further air blender comprises a further blender housing with a further first air inlet for receiving air from the roof space, a further second air inlet for drawing in air from the cultivation space, a further air outlet in fluid communication with the further inlet side of the further fan, and a further blending space defined between the further first air inlet, the further second air inlet and the further air outlet. In an embodiment thereof, one of the one or more carbon dioxide supply ducts is in fluid communication with the further air blender and debouches into the further blending space of the further air blender, in particular directly downstream of the further air outlet.
In an embodiment, the further ventilating device comprises a further air duct with a further air duct inlet, a further air duct outlet, and a further air channel extending between the further air duct inlet and the further air duct outlet, wherein the further air channel debouches into the roof space of the greenhouse, wherein the further air channel passes through the separation plane, and wherein the further ventilation device is arranged for drawing air into the further air channel.
In an embodiment, the carbon dioxide dosing arrangement and/or further carbon dioxide dosing arrangement comprise a ventilation device adapter for arranging the carbon dioxide dosing arrangement and/or further carbon dioxide dosing arrangement within the greenhouse, in particular the cultivation space thereof.
In an embodiment, the ventilation device adapter comprises a top base beam extending parallel to the separation plane, and wherein the air duct or the further alr duct is supported by the top base beam. In an embodiment thereof, the top base beam comprises at least one air passage and the air channel or the further air channel extends through the at least one air passage.
In an embodiment, the top base beam extends between subseguent transverse frames in a direction transverse thereto, and wherein the fabric screen is guided along the longitudinal sides of the top beam between the subsequent transverse frames.
In an embodiment, the top base beam extends parallel along and is secured to one of the transverse frames, and wherein the top base beam is arranged between the respective transverse frame and the fabric screen.
In an embodiment, the greenhouse comprises a carbon dioxide monitoring device configured for monitoring a concentration of carbon dioxide within the cultivation space. Such a carbon dioxide monitoring device provides advantageously to introduce carbon dioxide into the cultivation space when it is required.
According to a second aspect, the invention provides a method for carbon dioxide dosing in a cultivation space of a greenhouse according to the first aspect of the invention, wherein the method comprises the steps of: - by the carbon dioxide dosing arrangement, displacing air within the cultivation space; — monitoring the concentration of carbon dioxide within the cultivation space; and = if the monitored concentration of carbon dioxide is below a first predetermined threshold, supplying carbon dioxide to the carbon dioxide circulating arrangement in order to displace carbon dioxide within the cultivation space.
The method as at least the same technical advantages as described in relation to the greenhouse according to the first aspect of the invention.
In an embodiment, the method further comprises the step of stopping supplying carbon dioxide to the carbon dioxide circulating arrangement, if the monitored concentration of carbon dioxide is above a second predetermined threshold.
The various aspects and features described and shown in the specification can be applied, individually, wherever possible. These individual aspects, in particular the aspects and features described in the attached dependent claims, can be made subject of divisional patent applications.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be elucidated on the basis of an exemplary embodiment shown in the attached drawings, in which: Figure 1 shows a schematic overview of a part of an agricultural and/or horticultural greenhouse with multiple rows of support columns connected by transverse frames, and a carbon dioxide dosing installation with a first carbon dioxide dosing arrangement according to an embodiment of the invention; Figures 2A-2C show an isometric view, a front view and a side view, respectively, of the first carbon dioxide dosing arrangement of figure 1; and Figure 3 shows a schematic overview of a part of an agricultural and/or horticultural greenhouse with multiple rows of support columns connected by transverse frames, and a carbon dioxide dosing installation with a carbon dioxide dosing arrangement according to a further embodiment of the invention
DETAILED DESCRIPTION OF THE INVENTION A greenhouse 1, such as an agricultural and/or horticultural greenhouse, according to an embodiment of the invention is shown partially in figure 1. The partially shown greenhouse 1 is a Venlo type greenhouse, and comprises a number of identical metal columns 2, for example metal lattice columns, that are positioned spaced apart and in rows oriented in the longitudinal direction L of the greenhouse 1. The lattice columns 2 are connected by means of metal transverse frames 3, extending in the transverse direction T of the greenhouse 1, for forming a supporting structure for a roof structure 4. Each of the transverse frames 3 comprises a horizontal top bar 5 and a horizontal bottom bar 6 extending below the horizontal top bar 5. The horizontal top bar 5 and the horizontal bottom bar 6 are interconnected by means of brace struts 7 extending between the horizontal top bar 5 and the horizontal bottom bar 6. The roof 4 of the greenhouse 1 comprises multiple identical support gutters 8 extending parallel to each other in the longitudinal direction L of the greenhouse 1. The support gutters 4 are alternately supported by the columns 2 or by the transverse frames 10 in the transverse direction T of the greenhouse 1. The roof 4 comprises multiple roof ridges 9 each arranged between two adjacent support gutters 8 and extending parallel to the support gutters 8. The roof 4 comprises multiple glass rods 10 extending in the transverse direction T of the greenhouse 1 between the support gutters 8 and the roof ridges 9, and fixed glass panels 11 held by the support gutters 8, the roof ridges 9 and the glass rods 10 along their circumference. Furthermore, the roof 4 is provided with regularly distributed roof passages 12 of which one is shown in figure 1. In this example the roof passage 12 has a rectangular shape and is located near one of the roof ridges 9.
The greenhouse 1 has multiple screens 15 of which one is shown in figure 1. The screens 15 are provided between a pair of adjacent transverse frames 3, and a non- shown plurality of guiding wires for guiding the screens 15 and extending between the transverse frames 3 in the longitudinal direction L of the greenhouse 1. The screens 15 are moveable between the shown open state, and a non- shown closed stated, by means of one or more non-shown actuators. In the closed state, the screens 15 extending in a substantially horizontal or horizontal separation plane in which the screens 15 divide the greenhouse 1 into a cultivation space 13 located below the separation plane and a roof space 14 located above the separation plane. The closed state of the screen 15 enables the cultivation space 13 and the roof space 14 to have different climate conditions, for example with respect to alr temperature,
air humidity, and concentrations of carbon dioxide and oxygen in the air.
How the screens 15 may be incorporated into the greenhouse 1, for example, is shown in Dutch patent publication NL 2001036.
The greenhouse 1 includes a carbon dioxide (COz) dosing installation 20 for dosing carbon dioxide into the cultivation space 13. The carbon dioxide dosing installation 20 comprises a first carbon dioxide ventilation arrangement 21 and a second carbon dioxide ventilation arrangement 22 each configured for dosing carbon dioxide into the cultivation space 13. In addition to being configured for dosing carbon dioxide into the cultivation space 13, the first carbon dioxide ventilation arrangement 21 is configured for circulating air in the cultivation space 13 and/or for drawing air from outside the greenhouse 1 into the cultivation space 13, and the second carbon dioxide ventilation arrangement 22 is configured for circulating air in the cultivation space 13 and/or for drawing air from the roof space 14 into the cultivation space 13.
As shown in figure 1, each of the first and the second carbon dioxide ventilation arrangement 21, 22 has a ventilation device adapter 23 extending between and substantially transverse to adjacent transverse frames 3. Fach ventilation device adapter 23 has a top base beam 24, extending within the separation plane, and a bottom base beam 25 arranged below the top base beam 24. The top base beam 24 and the bottom base beam 25 are each provided with two oblique beam legs 26, 27 merging into a beam center section 28, and with an air passage 29 within the beam center section 28. Each ventilation device adapter 23 is provided with an intermediate coupling duct 30 arranged between the top base beam 24 and the bottom base beam 25 and in air communication with the air passage 29 of the top base beam 24 and the bottom base beam 25.
The first and the second carbon dioxide ventilation arrangement 21, 22 each comprises a ventilation device 35 that is arranged below the bottom base beam 25 and is coupled to the bottom base beam 25 by means of a lower coupling duct 33 having a duct air inlet connected to the air passage of the bottom base beam 25, and a duct air outlet. The ventilation device 35 has an air blender 36 that is connected to the duct air outlet of the lower coupling duct 33, and a fan 37 that is connected to the air blender 36. The air blender 36, as shown in figure 2A, comprises a blender housing 38 with a first blender inlet 39 at the topside thereof and in air communication with the duct air outlet of the lower coupling duct 33, a second blender inlet 40 that is in air communication with the cultivation space 13, and a blender outlet 41 opposite to the second blender inlet 40 and in air communication to the fan 37. The blender housing 38 defines a blending space between the first blender inlet 39, the second blender inlet 40 and the blender outlet 41. The air blender 36 comprises non-shown blending flaps provided parallel to each other within the blending space 62 and rotatable about a rotation axis substantially parallel to the transverse direction T of the greenhouse 1 by means of a not shown motor.
The fan 37 in this example is an axial fan comprising fan blades that are rotatable by a motor. When the fan 37 is activated, air is drawn into the air blender
36. By adjusting the orientation of the blending flaps, the ratio of air drawn into the blending space from the lower coupling duct 33 and from the cultivation space 13 can be regulated.
As shown in figure 1, the first carbon dioxide ventilation arrangement 21 is provided with an upper coupling duct 34 arranged at the top base beam 24 and extending between the top base beam 24 and the roof passage 12, which might be closed or opened by a closing panel 42. The first carbon dioxide ventilation arrangement 21, therefore, is enabled to draw air in from the outside of the greenhouse 1, where the second carbon dioxide ventilation arrangement 22 is enabled to draw air in from the roof space 14 of the greenhouse 1. In respect of the first carbon dioxide ventilation arrangement 21, the intermediate coupling duct 30, the lower coupling duct 33 and the upper coupling duct 34 form an air duct, while in respect of the second carbon dioxide ventilation arrangement 22, the intermediate coupling duct 30 and the lower coupling duct 33 form an air duct.
Furthermore, the carbon dioxide dosing installation 20 has a non-shown carbon dioxide source, such as a source configured for burning natural gas, for example a boiler or a cogenerator for cogeneration, Or a source comprising liquid carbon dioxide, such as one or more refillable carbon dioxide storage tanks. The carbon dioxide dosing installation 20 further includes one or more carbon dioxide supply ducts 50 provided within the greenhouse 1, wherein each of the carbon dioxide supply ducts 50 extends between the carbon dioxide source and one of the first and second carbon dioxide ventilation arrangements 21, 22 in order to supply carbon dioxide to each of the first and second carbon dioxide ventilation arrangements 21, 22.
As shown in more detail in figures 2A-2C, the carbon dioxide supply duct 50 is connected to the blender housing 38 directly downstream of the blender outlet 41 by means of a duct connector 51. The duct connector 51 has a T-shaped connector piece 52 having a connector inlet 53, a first connector outlet 54 and a second connector outlet 55, opposite to the first connector outlet 54, The connector inlet 53 is connected to the outlet of the carbon dioxide supply duct 50 such that carbon dioxide transported from the non-shown carbon dioxide source can be received by the T-shaped connector piece 52. The first connector outlet 54 is connected to a first side of the blender housing 38 by means of a first connecting duct 56 debouching into the blending space, and wherein the second connector outlet 55 is connected to a second side, opposite to the first side, of the blender housing 38 by means of a second connecting duct 57 debouching into the blending space.
The second carbon dioxide dosing arrangement 22 is connected to the carbon dioxide source accordingly.
During use, carbon dioxide ís transported from the carbon dioxide source towards the blender housing 38 and is introduced into the blending space directly downstream of the blender outlet 41. The fan 37 draws in a combination of air and carbon dioxide from the blender space, and the air and carbon dioxide become mixed up thoroughly by the rotating fan blades.
The mixture of air and carbon dioxide is blown into the cultivation space, in particular the upper part thereof, by the fan 37, such that the carbon dioxide gets distributed throughout the cultivation space 13. Since carbon dioxide has a specific mass, also known as volumetric mass density, which is higher than the specific mass of air, the carbon dioxide will descend downwards to the crops disposed within the cultivation space 13. As a result, the dosed carbon dioxide is spread equally or substantially equally over the crops within the greenhouse 1. Another embodiment of a greenhouse 101 according to the invention is shown in figure 3. The greenhouse 101 comprises substantially the same features as the greenhouse 1 as shown in figure 1. In order to refrain from re- introducing features, similar features are referred to by the same reference number increased with 100. The greenhouse 101 differs from the greenhouse 1 in that the carbon dioxide dosing installation 120 comprises, as a carbon dioxide ventilation arrangement 121, a fan 137, being the ventilation device, such as an axial fan comprising fan blades that are rotatable by a motor, that is arranged at one of the metal columns 102 and in the upper part of the cultivation space 103. In particular, the fan 137 is arranged just below the separation plane.
The fan 137 is arranged at the metal column 102 by means of a mounting frame 160 configured for supporting the fan 137 with respect to the metal column 102.
As shown in figure 3, the fan 137 has an inlet side 161, at which air is drawn into the fan 137, and an outlet side 162, at which air is blown into the cultivation space 113. The carbon dioxide supply duct 150, which is connected to the carbon dioxide source, is arranged in such manner, that the outlet thereof is located at the inlet side 161 of the axial fan 137. The outlet of the carbon dioxide supply duct 150 is situated higher, in particular slightly higher, than the fan 137. Although only one fan 137 is shown, it is noted that multiple fans 137 may be arranged within the cultivation space 137. During use, carbon dioxide ís transported from the carbon dioxide source to the outlet of the carbon dioxide supply duct 150, where the transported carbon dioxide is ejected from the carbon dioxide supply duct 150. Due to the specific mass of carbon dioxide being higher than the specific mass of air, the ejected carbon dioxide descends downwards. Because of the rotating fan blades of the fan 137, air and therewith the carbon dioxide is drawn into the fan 137. Within the fan 137, the drawn in air and carbon dioxide are mixed up. Subsequently, the mixture of air and carbon dioxide is blown into the cultivation space 113 in a blow direction V, in particular above the crops situated within the cultivation space 113. Since the fan 137 functions as a recirculation fan 137, carbon dioxide is recirculated within the cultivation space 113, such that an uniform distribution of carbon dioxide throughout the cultivation space 113 is obtained.
It is noted that although a single carbon dioxide supply duct 50, 150 is shown in the figures, the carbon dioxide supply duct 50, 150 may be part of a network structure of interconnected supply ducts and regulating valves in order to regulate the amount of carbon dioxide being transported from the carbon dioxide source to one or more of the carbon dioxide circulating arrangements.
It is to be understood that the above description is included to illustrate the operation of the preferred embodiments and is not meant to limit the scope of the invention.
From the above discussion, many variations will be apparent to one skilled in the art that would yet be encompassed by the scope of the present invention.
Claims (23)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2027064A NL2027064B1 (en) | 2020-12-08 | 2020-12-08 | Greenhouse with carbon dioxide dosing installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2027064A NL2027064B1 (en) | 2020-12-08 | 2020-12-08 | Greenhouse with carbon dioxide dosing installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2027064B1 true NL2027064B1 (en) | 2022-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2027064A NL2027064B1 (en) | 2020-12-08 | 2020-12-08 | Greenhouse with carbon dioxide dosing installation |
Country Status (1)
| Country | Link |
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| NL (1) | NL2027064B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009060436A2 (en) * | 2007-11-08 | 2009-05-14 | The State Of Israel, Ministry Of Agriculture & Rural Development, Agricultural Research Organization, (A.R.O.), Volcani Center | Method and system for heating and dehumidifying |
| NL2001036C2 (en) | 2007-11-28 | 2009-06-02 | Dalsem Tuinbouwprojecten B V | Greenhouse with screen, has screen cord extending inside chamber in transverse frame for supporting roof |
| JP2015223118A (en) * | 2014-05-28 | 2015-12-14 | こもろ布引いちご園株式会社 | Control method of plant growth environment, control device, and program for control |
| WO2018062988A2 (en) * | 2016-09-30 | 2018-04-05 | Nges Holding B.V. | Assimilation lamp device |
| EP3424298A1 (en) * | 2016-02-29 | 2019-01-09 | Teijin Film Solutions Limited | Greenhouse, plant cultivation method using said greenhouse, and heat-ray reflecting film structure |
| WO2019216768A1 (en) * | 2018-05-09 | 2019-11-14 | Dalsem Beheer B.V. | Horticultural and/or agricultural greenhouse |
-
2020
- 2020-12-08 NL NL2027064A patent/NL2027064B1/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009060436A2 (en) * | 2007-11-08 | 2009-05-14 | The State Of Israel, Ministry Of Agriculture & Rural Development, Agricultural Research Organization, (A.R.O.), Volcani Center | Method and system for heating and dehumidifying |
| NL2001036C2 (en) | 2007-11-28 | 2009-06-02 | Dalsem Tuinbouwprojecten B V | Greenhouse with screen, has screen cord extending inside chamber in transverse frame for supporting roof |
| JP2015223118A (en) * | 2014-05-28 | 2015-12-14 | こもろ布引いちご園株式会社 | Control method of plant growth environment, control device, and program for control |
| EP3424298A1 (en) * | 2016-02-29 | 2019-01-09 | Teijin Film Solutions Limited | Greenhouse, plant cultivation method using said greenhouse, and heat-ray reflecting film structure |
| WO2018062988A2 (en) * | 2016-09-30 | 2018-04-05 | Nges Holding B.V. | Assimilation lamp device |
| WO2019216768A1 (en) * | 2018-05-09 | 2019-11-14 | Dalsem Beheer B.V. | Horticultural and/or agricultural greenhouse |
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