CN107896747B - Device and method for utilizing heat energy in sunlight greenhouse - Google Patents
Device and method for utilizing heat energy in sunlight greenhouse Download PDFInfo
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- CN107896747B CN107896747B CN201711421913.0A CN201711421913A CN107896747B CN 107896747 B CN107896747 B CN 107896747B CN 201711421913 A CN201711421913 A CN 201711421913A CN 107896747 B CN107896747 B CN 107896747B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 238000005338 heat storage Methods 0.000 claims abstract description 53
- 238000010792 warming Methods 0.000 claims abstract description 46
- 241000196324 Embryophyta Species 0.000 claims description 47
- 239000000758 substrate Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
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- 230000033228 biological regulation Effects 0.000 description 6
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- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
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Classifications
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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
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/243—Collecting solar energy
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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
- A01G31/00—Soilless cultivation, e.g. hydroponics
- A01G31/02—Special apparatus therefor
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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
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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Abstract
The invention relates to the field of solar greenhouse internal heat energy utilization, in particular to a solar greenhouse internal heat energy utilization device and a solar greenhouse internal heat energy utilization method. The device comprises a heat collection system and a plant warming system; the heat collection system includes: a heat collecting plate and an underground heat storage bucket which are arranged in the sunlight greenhouse, a circulating loop is established between the heat collecting plate and the underground heat storage bucket through a water pipe, and the water pipe penetrates through the heat collecting plate; the plant warming system comprises: the heating pipe is arranged on a heating pipe for heating rhizosphere and/or canopy of the plant, and a heating loop is established between the heating pipe and the underground heat storage bucket. The solar greenhouse solar energy collection device utilizes circulating fluid to collect solar radiation energy reaching the rear wall of the solar greenhouse in daytime, has obvious energy-saving effect, is low in cost per unit area, and has the characteristics of environmental protection and sustainability. In order to improve the utilization efficiency of the heat energy, the plant heating system is used for precisely heating the rhizosphere of the crop and the canopy of the crop in the sunlight greenhouse at a low temperature period, so that the crop yield and the economic benefit of the sunlight greenhouse are integrally improved.
Description
Technical Field
The invention relates to the field of solar greenhouse internal heat energy utilization, in particular to a solar greenhouse internal heat energy utilization device and a solar greenhouse internal heat energy utilization method.
Background
Sunlight greenhouse is an important facility for producing vegetables in north China, and research and development and application of energy-saving environment regulation technology are receiving more and more attention in recent years. Temperature is an important environmental factor, and reasonable temperature regulation is particularly important in sunlight greenhouses. The regulation and control of temperature in the soilless culture process in the sunlight greenhouse can be divided into matrix temperature regulation and control and air temperature regulation, wherein the matrix temperature mainly influences the root zone temperature of crops, and can regulate rhizosphere growth, rhizosphere respiration, moisture and nutrient absorption, rhizosphere internal substance synthesis, rhizosphere microbial activity, growth and differentiation of near-root meristem and the like of crops. The air temperature can also regulate the morphogenesis and organ differentiation of crops by changing the activity of enzymes in crops to affect photosynthesis, respiration, etc. of crops. However, the traditional sunlight greenhouse has weak environmental regulation capability, so that the substrate temperature and the air temperature in the sunlight greenhouse in winter are low, and low-temperature stress has become an important restriction for vegetable production.
The root zone heating equipment which can be used in the current production mainly comprises a heat-adding and radiating pipeline of a coal (oil) fired boiler, a ground source heat pump, an underground heat storage system, a heat-adding and radiating pipeline of a combustion pond, electric heating and the like. In the heating mode, the energy consumption of the heating pipeline of the coal (oil) fired boiler and the electric heating mode is large, the investment of water source heat pump facilities and equipment is excessive, the underground heat storage system is low in efficiency and difficult to control, the air pollution problem can be caused by the mode of heating the heating pipeline of the combustion pool, and the mode is limited by regional geology.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a solar greenhouse indoor heat energy utilization device and a solar greenhouse indoor heat energy utilization method, and solves the problems that an existing greenhouse indoor temperature control device is complex in structure, high in cost, uncontrollable and poor in control accuracy.
(II) technical scheme
In order to solve the technical problems, the invention provides a solar greenhouse internal heat energy utilization device, which comprises a heat collection system and a plant warming system;
The heat collecting system includes: the solar heat collection device comprises a heat collection plate and an underground heat storage bucket which are arranged in a solar greenhouse, wherein a circulation loop is established between the heat collection plate and the underground heat storage bucket through a water pipe, and the water pipe penetrates through the heat collection plate;
The plant warming system includes: the heating pipe is arranged on the rhizosphere and/or the canopy of the plant, and a heating loop is established between the heating pipe and the underground heat storage bucket.
In some embodiments, it is preferable that a submersible pump is provided on the water pipe.
In some embodiments, it is preferable that a plurality of the heat collecting plates are coupled in parallel to the water pipe.
In some embodiments, it is preferred that the plant warming system comprises: a rhizosphere warming system, the rhizosphere warming system comprising: the rhizosphere heating loop is composed of a rhizosphere heating pipeline, a rhizosphere water supply pipe, a rhizosphere water return pipe and the underground heat storage bucket; wherein,
The rhizosphere heating pipeline is arranged below the rhizosphere, the rhizosphere water supply pipe and the rhizosphere water return pipe are respectively inserted into the underground heat storage bucket, and the rhizosphere heating pipeline is arranged between the rhizosphere water supply pipe and the rhizosphere water return pipe.
In some embodiments, it is preferred that the rhizosphere heating conduits are arranged in a parallel manner under the rhizosphere of the greenhouse plant.
In some embodiments, it is preferred that a circulation pump is provided on the rhizosphere heating circuit.
In some embodiments, it is preferred that the rhizosphere heating tunnel is placed 25-35 cm deep into the ground when the plant is cultivated in soil.
In some embodiments, it is preferred that the rhizosphere heating tunnel is placed under a substrate bag when the plant is grown on a substrate.
In some embodiments, it is preferred that the plant warming system comprises: a canopy warming system, the canopy warming system comprising: a canopy heating loop consisting of a canopy heating pipeline, a telescopic corrugated hose, a canopy water supply pipe, a canopy water return pipe and the underground heat storage bucket; wherein,
The canopy heating pipeline is arranged at the periphery of the plant stem tip;
A telescopic corrugated hose is arranged between the canopy warming pipeline and the canopy water supply pipe; a telescopic corrugated hose is also arranged between the canopy warming pipeline and the canopy water return pipe;
The canopy water supply pipe and the canopy water return pipe are inserted into the underground heat storage bucket.
In some embodiments, it is preferred that a circulation pump is provided on the canopy heating circuit.
In some embodiments, it is preferred that the canopy heating pipes are arranged in parallel in the same pass 30-40 cm below the plant stem tip in the greenhouse.
In some embodiments, preferably, the solar greenhouse thermal energy utilization device further includes: the controller is respectively connected with the rhizosphere heating system and the canopy heating system;
the controller is respectively connected with the timer, a water temperature sensor in the underground heat storage bucket and an air temperature sensor in the sunlight greenhouse.
The invention also provides a solar greenhouse heat energy utilization method, which comprises the following steps:
starting a heat collection system according to a first preset condition, and converting solar energy into heat energy of water in an underground heat storage bucket;
starting a plant heating system according to a second preset condition to heat plant rhizosphere;
starting a plant warming system according to a third preset condition to warm the plant canopy;
the first preset condition includes: under 24 hours, 8:00-17:30, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket;
the second preset condition includes: under 24 hours, 9:30-16:00, and the temperature of water in the underground heat storage bucket is higher than the temperature in the sunlight greenhouse;
The third preset condition includes: under 24 hours, 00:00-8:00, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket.
(III) beneficial effects
After sunlight is collected through the heat collecting plate, heat is transferred into water of the heat collecting system, flows in the circulation loop and enters the underground heat storage bucket, water with higher temperature is led out from the underground heat storage bucket by the plant warming system, and the water flows in the plant warming system to warm the rhizosphere or canopy of plants. The solar energy collection system has the advantages that the whole structure is simple, the heat collected by the heat collection system on sunny days can reach 182-223 MJ/d, the method is used for collecting solar radiation energy reaching the rear wall of the sunlight greenhouse by using circulating fluid in the daytime, the energy-saving effect is obvious, the cost of the device per unit area is low, and the solar energy collection system has the characteristics of environmental protection and sustainability. In order to improve the utilization efficiency of the heat energy, the plant heating system is used for precisely heating the rhizosphere of the crop and the canopy of the crop in the sunlight greenhouse at a low temperature period, so that the crop yield and the economic benefit of the sunlight greenhouse are integrally improved.
Drawings
Fig. 1 is a schematic structural diagram of a solar greenhouse heat energy utilization device according to an embodiment of the invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The terms "first", "second", "third", "fourth" do not represent any sequence relationships, and are merely for convenience of description. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The "current" is the time when an action is performed, and a plurality of current occurs in the text, which are all recorded in real time as time passes.
Based on the problems of complex structure, high cost and poor accuracy of uncontrollable control of the existing temperature control device in the greenhouse, the invention provides a device and a method for utilizing heat energy in a sunlight greenhouse.
The product, method, etc. will be described in detail below by means of basic designs, extended designs, and alternative designs.
The invention provides a solar greenhouse internal heat energy utilization device, which is shown in figure 1 and comprises a heat collection system and a plant warming system; the heat collection system includes: the solar heat collection device comprises a heat collection plate 1 and an underground heat storage water bucket 2 which are arranged in a solar greenhouse, wherein a circulation loop is established between the heat collection plate 1 and the underground heat storage water bucket 2 through a water pipe, and the water pipe penetrates through the heat collection plate 1; the plant warming system comprises: the heating pipe is arranged on a heating pipe for heating rhizosphere and/or canopy of the plant, and a heating loop is established between the heating pipe and the underground heat storage bucket 2.
In the heat collecting system, the heat collecting plate 1 is used for collecting solar energy, one of which is a flat-plate solar heat collector, which is a device for absorbing solar radiation energy and transferring heat to working media, is a special heat exchanger, and the working media in the heat collector exchange heat with the long-distance sun. The flat-plate solar collector consists of a heat absorption plate core, a shell, a transparent cover plate, a heat insulation material and related parts. After the circulation pipeline is connected and the heat preservation water tank is arranged, the solar radiation heat can be absorbed, and the water temperature is increased. The insulated water tank can be understood as an underground heat storage bucket 2.
The underground heat storage bucket 2 is arranged underground, can achieve better heat preservation effect, and does not occupy the space on the ground.
It will be appreciated that in order to facilitate the flow of water in the circulation circuit, a submersible pump 3 needs to be provided in the circulation circuit. The submersible pump 3 can also be arranged underground and is provided with an automatic control component and a manual control component for opening and closing.
The plant warming system can supply high temperature to the rhizosphere part of crops and also can supply high temperature to the canopy part of crops, so that the warming system has pertinence and better warming effect.
Considering that the sunlight greenhouse has large space, the heat collecting plate 1 needs to be equipped
The heat collecting plates 1 are connected in parallel with the water pipe, so that the heat collected by the heat collecting plates 1 can directly enter the water pipe as far as possible, other heat collecting plates 1 do not need to flow in, the possibility of mixing with water in other heat collecting plates 1 is reduced, and the solar energy absorption effect can be improved.
In order to heat the rhizosphere, the plant heating system comprises: a rhizosphere heating system, the rhizosphere heating system comprising: the rhizosphere heating loop is composed of a rhizosphere heating pipeline 4, a rhizosphere water supply pipe, a rhizosphere water return pipe and an underground heat storage bucket 2; the rhizosphere heating pipeline 4 is arranged below the rhizosphere, the rhizosphere water supply pipe and the rhizosphere water return pipe are respectively inserted into the underground heat storage bucket 2, and the rhizosphere heating pipeline 4 is arranged between the rhizosphere water supply pipe and the rhizosphere water return pipe.
The rhizosphere water supply pipe is used for pumping out water from the underground heat storage bucket 2 and supplying the water to the rhizosphere warming pipeline, the rhizosphere warming pipeline is used for warming the periphery of the rhizosphere, the water flows out of the rhizosphere warming pipeline to the rhizosphere water return pipe, and then the water flows into the underground heat storage bucket 2 again, so that one-time warming cycle is completed.
Since crops in the sunlight greenhouse are planted according to ridges, in order to promote each ridge, at least the temperatures of each region are similar, the rhizosphere heating pipelines 4 are arranged below the rhizosphere of the plants in the greenhouse in a same-path parallel manner; the water discharged from the rhizosphere water supply pipe enters a plurality of rhizosphere heating pipe branch pipes connected in parallel, and then flows into the rhizosphere water return pipe from the rhizosphere heating pipe 4 branch pipes.
It is clear that in order to promote the circulation of the high-temperature water in the rhizosphere heating circuit, a circulation pump needs to be provided in the rhizosphere heating circuit. The circulating pump may be installed on the ground or underground.
Considering different crop planting modes, the setting positions of the rhizosphere heating pipelines 4 are different, for example: when plants are cultivated in soil, the rhizosphere heating pipeline 4 is placed in the depth of 25-35 cm underground; and, for example: when plants are cultivated as a substrate, the rhizosphere heating pipeline 4 is arranged below the substrate bag.
In order to heat the crop canopy, the plant heating system comprises: a canopy warming system, the canopy warming system comprising: the canopy heating loop is composed of a canopy heating pipeline, a telescopic corrugated hose 6, a canopy water supply pipe, a canopy water return pipe and an underground heat storage bucket 2; wherein, the canopy heating pipeline is arranged at the periphery of the plant stem tip; a telescopic corrugated hose 6 is arranged between the crown layer warming pipeline and the crown layer water supply pipe; a telescopic corrugated hose 6 is also arranged between the crown warming pipeline and the crown water return pipe; the canopy water supply pipe and the canopy water return pipe are inserted into the underground heat storage bucket 2.
The canopy warming pipe is higher than the ground, so that the conversion between the canopy warming pipe and the canopy water supply pipe and the canopy water return pipe is required by the telescopic corrugated hose 6.
The water with higher temperature is pumped out from the underground heat storage bucket 2 by the canopy water supply pipe and is sent into the telescopic corrugated hose 6 and the canopy heating pipeline, and after heat dissipation in the canopy area of crops, the water flows back to the underground heat storage bucket 2 from the telescopic corrugated hose 6 and the canopy water return pipe.
It is clear that in order to promote the circulation of the high-temperature water in the crown heating circuit, a circulation pump needs to be provided on the crown heating circuit. The circulating pump may be installed on the ground or underground.
Since the crops in the sunlight greenhouse are planted according to the ridges, in order to promote each ridge, at least each region has a similar temperature, the canopy heating pipes 5 are arranged in a parallel manner at the same pass below the stem tips of the plants in the greenhouse by 30-40 cm, such as 35 cm.
In the technology, the solar greenhouse internal heat energy utilization device can heat the rhizosphere and the canopy, and the canopy is directly irradiated by sunlight in consideration of the daytime without heating, but the sunlight irradiates at night, so that the canopy is heated at night generally. The temperature difference between the rhizosphere and the canopy is large in the daytime, and the rhizosphere is heated in the daytime in order to reduce the temperature difference. In addition, the sunlight exists in the daytime, the heat collecting system is started, and the sunlight does not exist at night, so the device for effectively controlling the solar heat collecting system further comprises: the controller is respectively connected with the rhizosphere heating system and the canopy heating system; the controller is respectively connected with the timer, the water temperature sensor in the underground heat storage bucket 2 and the air temperature sensor in the sunlight greenhouse.
The control mode of the controller comprises the following steps:
1. After 08:30 in daytime and when the indoor air temperature is higher than the water temperature in the underground heat storage bucket 2, the heat collection system is started to collect heat, and when the air temperature is lower than the water temperature or reaches 16:30, the heat collection system is closed. 2. After 10:00 of daytime and when the water temperature is higher than the rhizosphere temperature of crops, the rhizosphere heating system is started to heat the rhizosphere of the crops, and when the water temperature is lower than the rhizosphere temperature of the crops or reaches 15:00, the rhizosphere heating system is closed. 3. After 00:00 of night, when the temperature of the air is lower than the water temperature in the underground heat storage bucket 2, the canopy warming system is started to heat the canopy, and when the temperature is higher than the water temperature or 08:00 is reached, the canopy warming system is closed.
The dominant factors of the heat energy utilization strategy are the temperature change law of one day in the sunlight greenhouse in winter and the demand of crops on temperature. Because the temperature is lower in the winter in the north and the temperature is lower in the morning, the time for opening the sunlight greenhouse heat preservation quilt is 08:00-08:30, the temperature of the sunlight greenhouse starts to rise after the greenhouse is opened, heat collection can be carried out when the indoor air temperature is higher than the water temperature in the underground heat storage bucket 2, heat collection can not be carried out when the temperature is lower than the water temperature or reaches 16:30, and the heat collection system is closed. The rhizosphere temperature of crops is generally higher than the air temperature, the rhizosphere temperature is lower after 10:00, but photosynthesis is gradually enhanced, heating is beneficial to photosynthesis of crops at the moment, part of energy is stored in soil or a matrix, the heat preservation property of the soil is utilized to improve the rhizosphere temperature at night, the water temperature in the underground heat storage bucket 2 is reduced, and the heat collection efficiency of a heat collection system is improved. The sunlight greenhouse at night has lower air temperature, the stem tip meristem in the crop canopy is sensitive to temperature, and in order to improve the energy utilization efficiency, the heat energy is mainly applied to the canopy, especially the stem tip meristem, and the canopy heating pipeline 5 is positioned at the position 30cm-40cm below the crop stem tip.
Next, the present invention provides a solar greenhouse heat energy utilization method, which includes:
starting a heat collection system according to a first preset condition, and converting solar energy into heat energy of water in the underground heat storage bucket 2;
starting a plant heating system according to a second preset condition to heat plant rhizosphere;
starting a plant warming system according to a third preset condition to warm the plant canopy;
the first preset condition includes: under 24 hours, 8:00-17:30, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket 2;
the second preset condition includes: under 24 hours, 9:30-16:00, and the temperature of water in the underground heat storage bucket 2 is higher than the temperature in the sunlight greenhouse;
The third preset condition includes: under 24 hours, 00:00-8:00, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The solar greenhouse heat energy utilization device is characterized by comprising a heat collection system and a plant warming system;
The heat collecting system includes: the solar heat collection device comprises a heat collection plate and an underground heat storage bucket which are arranged in a solar greenhouse, wherein a circulation loop is established between the heat collection plate and the underground heat storage bucket through a water pipe, and the water pipe penetrates through the heat collection plate; a submersible pump is arranged on the water pipe; and/or a plurality of heat collecting plates are connected in parallel to the water pipe;
the plant warming system includes: the heating pipe is arranged on the rhizosphere and/or the canopy of the plant and used for heating, and a heating loop is established between the heating pipe and the underground heat storage bucket;
The plant warming system includes: a rhizosphere warming system, the rhizosphere warming system comprising: the rhizosphere heating loop is composed of a rhizosphere heating pipeline, a rhizosphere water supply pipe, a rhizosphere water return pipe and the underground heat storage bucket; when the plants are cultivated in soil, the rhizosphere heating pipeline is placed in the depth of 25-35 cm underground; or alternatively, the first and second heat exchangers may be,
When the plants are cultivated as the substrate, the rhizosphere heating pipeline is arranged below the substrate bag;
The plant warming system includes: a canopy warming system, the canopy warming system comprising: a canopy heating loop consisting of a canopy heating pipeline, a telescopic corrugated hose, a canopy water supply pipe, a canopy water return pipe and the underground heat storage bucket; the canopy heating pipeline is arranged 30-40 cm below the plant stem tip in the greenhouse in a same-pass parallel manner.
2. The solar greenhouse heat energy utilization device according to claim 1, wherein the rhizosphere heating pipeline is arranged below a rhizosphere, the rhizosphere water supply pipe and the rhizosphere water return pipe are respectively inserted into the underground heat storage bucket, and the rhizosphere heating pipeline is arranged between the rhizosphere water supply pipe and the rhizosphere water return pipe.
3. The solar greenhouse heat energy utilization apparatus of claim 2, wherein the rhizosphere heating pipes are arranged in parallel in the same pass under the rhizosphere of the plants in the greenhouse;
And/or a circulating pump is arranged on the rhizosphere heating loop.
4. A solar greenhouse internal heat energy utilization device according to any one of claims 1-3, wherein the canopy warming pipe is arranged at the periphery of the plant stem tip;
A telescopic corrugated hose is arranged between the canopy warming pipeline and the canopy water supply pipe; a telescopic corrugated hose is also arranged between the canopy warming pipeline and the canopy water return pipe;
The canopy water supply pipe and the canopy water return pipe are inserted into the underground heat storage bucket.
5. The solar greenhouse indoor heat energy utilization device according to claim 4, wherein a circulating pump is arranged on the canopy heating circuit.
6. The solar greenhouse heat energy utilizing apparatus as recited in claim 4, further comprising: the controller is respectively connected with the rhizosphere heating system and the canopy heating system;
the controller is respectively connected with the timer, a water temperature sensor in the underground heat storage bucket and an air temperature sensor in the sunlight greenhouse.
7. A solar greenhouse heat energy utilization method, applied to the solar greenhouse heat energy utilization device as claimed in any one of claims 1 to 6, comprising:
starting a heat collection system according to a first preset condition, and converting solar energy into heat energy of water in an underground heat storage bucket;
starting a plant heating system according to a second preset condition to heat plant rhizosphere;
starting a plant warming system according to a third preset condition to warm the plant canopy;
the first preset condition includes: under 24 hours, 8:00-17:30, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket;
the second preset condition includes: under 24 hours, 9:30-16:00, and the temperature of water in the underground heat storage bucket is higher than the temperature in the sunlight greenhouse;
The third preset condition includes: under 24 hours, 00:00-8:00, and the temperature in the sunlight greenhouse is higher than the temperature of water in the underground heat storage bucket.
Priority Applications (1)
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| CN110089317A (en) * | 2019-03-29 | 2019-08-06 | 塔里木大学 | A kind of heliogreenhouse water curtain thermal-arrest floor heating Heating system and its application method |
| CN110024600A (en) * | 2019-04-17 | 2019-07-19 | 西北农林科技大学 | A kind of greenhouse solar energy collection thermal desorption system and control method |
| CN114097485B (en) * | 2021-12-13 | 2023-09-22 | 中国农业科学院农业环境与可持续发展研究所 | Heat collecting and shading system of multi-span greenhouse |
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