CN115191242A - An experimental platform for semi-underground granary cooling based on groundwater circulation cooling - Google Patents

Abstract

The invention relates to a semi-underground granary cooling experiment platform based on groundwater circulation cooling. The heat pipe, the groundwater simulation box is connected with the cooling and heat exchange pipe through a waterway, and the waterway includes an inlet water channel and a return water channel connected between the groundwater simulation box and the cooling heat exchange tube. There are vents and air conditioners on it. The invention provides a semi-underground granary cooling experiment platform based on groundwater circulation cooling, which can reduce the power consumption for cooling the granary and is used for the simulation test.

Description

An experimental platform for semi-underground granary cooling based on groundwater circulation cooling

technical field

The invention relates to the technical field of granary temperature control, in particular to a semi-underground granary cooling experiment platform based on groundwater circulation cooling.

Background technique

Existing granaries are mostly built on the ground for moisture-proof purposes. In summer in the Yangtze River Delta region, the temperature of the grains in the granaries will rise to 30°C or even higher due to sunlight and far-infrared radiation from objects on the ground.

If you directly use the air conditioner to cool down, it will not only lead to a huge loss of power and energy, but also due to the poor thermal conductivity of the grain, it is difficult for the inventory to cool down in a balanced manner. Very little. What's more, if the temperature of the grain with high temperature is suddenly cooled and the temperature difference is too large, it is easy to form condensation and cause the phenomenon of grain hydrolysis mold.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a semi-underground granary cooling experiment platform based on groundwater circulation cooling, which can reduce the power consumption for cooling the granary for the simulation test.

In order to solve the above-mentioned technical problems, the technical scheme of a semi-underground granary cooling experiment platform based on groundwater circulation cooling in the present invention is as follows:

A semi-underground granary cooling experiment platform based on groundwater circulation cooling, comprising a semi-underground granary with an aboveground part of the silo body and an underground part of the silo body, and a groundwater simulation box; The groundwater simulation box is connected with the cooling and heat exchange tube through a waterway. The waterway includes an inlet water channel and a return water channel connected between the groundwater simulation box and the cooling and heat exchange tube. Vents and air conditioning units.

The beneficial effects of the present invention are as follows: the semi-underground granary in the present invention includes an underground part of the silo body placed below the ground during use and an above-ground part of the silo body placed above the ground during use, so that the entire semi-underground granary can have both the above-ground granary. The advantages of the underground granary, for example, the temperature of the bulk grain in the underground part of the silo body will not be too high, and the bulk grain in the above-ground part of the silo body is easy to ventilate and dehumidify, which means that only the above-ground part of the silo body needs to be cooled during cooling treatment Cooling, which reduces the energy consumption required for cooling to a certain extent; in addition, when it is necessary to cool the above-ground part of the silo, the water in the underground simulated water tank simulates groundwater and has a lower water temperature of groundwater, which can be passed through The cooling and heat exchange tube preliminarily cools the above-ground part of the silo to further save energy consumption. After cooling through the cooling heat-exchange tube, when the temperature of the above-ground part of the silo still does not meet the requirements, the air-conditioning device is used to cool the above-ground part of the silo. adjust.

Further, the cooling and heat exchange tubes are arranged in a ring along the inner wall of the above-ground part of the silo body.

Further, the semi-underground granary cooling experiment platform also includes a solar power supply device, and the solar power supply device includes a solar cell panel and a battery electrically connected to the solar cell panel. and water pump.

Further, a solar panel mounting bracket is arranged on the top of the ground part of the warehouse body, and the solar panel is mounted on the solar panel mounting bracket through an angle adjustment mechanism, and the solar panel mounting bracket makes the installation orientation and pitch angle of the solar panel adjustable. .

Further, the height of the above-ground part of the silo body and the underground part of the silo body are the same.

Further, the semi-underground granary cooling experiment platform further includes a refrigerator capable of temperature adjustment, and the groundwater simulation box is arranged in the refrigerator.

Further, the semi-underground granary cooling experiment level also includes a temperature monitoring system. The middle of the semi-underground granary is provided with vertically arranged sensor installation rods. The temperature monitoring system includes a center temperature sensor and an edge temperature sensor. The center temperature sensor is distributed on the sensor installation rod. The upper, middle and lower parts of the granary, the edge temperature sensors are evenly arranged on the inner side of the silo wall of the semi-underground granary at intervals along the circumferential direction.

Further, the air conditioning device includes a refrigerator and a heat exchange box, the heat exchange box includes a heat exchange box body with an air inlet and an air outlet of the heat exchange box, and a heat exchange box is arranged on the upper end of the heat exchange box box. The water inlet, the lower end of the heat exchange box is provided with a water outlet of the heat exchange box, the water inlet of the heat exchange box and the water outlet of the heat exchange box are respectively connected with the groundwater simulation box through corresponding water pipes, and the water flow passes through the water inlet of the heat exchange box. During the process of the water outlet of the hot box, the air inlet of the heat exchange box and the air flow between the air outlet of the heat exchange box are provided with a cooling water curtain, and the air outlet of the heat exchange box is connected to the air inlet of the refrigerator.

Further, the air outlet of the refrigerator is connected with an air supply box, and the air supply box has a spherical air outlet with an adjustable air outlet direction.

Further, the water outlet of the heat exchange tank flows back to the groundwater simulation tank through the cooling heat exchange pipe.

A solar panel is installed on the top of the above-ground part of the silo, which uses solar energy to generate electricity to provide power for the water pump and air conditioner, further saving energy.

Further, the air inlet of the refrigerator is cooled first through the cooling water curtain, and the water source of the cooling water curtain also comes from the groundwater simulation box. The lowering of the inlet air temperature is conducive to further reducing the power consumption of the refrigerator, and the increase of the inlet air humidity allows the moisture entering the granary to absorb heat through evaporation, improving the cooling effect.

Description of drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown by way of example and not limitation, and like or corresponding reference numerals refer to like or corresponding parts, wherein:

1 is a schematic structural diagram of an embodiment of a semi-underground granary system based on groundwater circulation device cooling in the present invention;

Fig. 2 is the schematic diagram of the cooperation of the heat exchange box, the refrigerator and the air supply box in Fig. 1;

Description of reference numerals: 1. The warehouse wall of the warehouse body on the ground; 2. The warehouse roof; 3. The air inlet of the heat exchange box; 4. The ventilation opening; 5. The refrigerator; 6. The air supply box; 8. Battery; 9. Air duct; 10. Spherical air outlet; 11. Cooling heat exchange pipe; 12. Temperature sensor; 13. Groundwater simulation box; 14. Water pump; 15. Soil layer; 16. Water inlet of heat exchange box; 17, heat exchange box; 18, water outlet of heat exchange box; 19, cooling water curtain; 20, air outlet of heat exchange box.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention.

Embodiments of a semi-underground granary cooling experimental platform based on groundwater circulation cooling in the present invention are shown in Figures 1 to 2:

Including semi-underground granary, semi-underground granary refers to a granary with an underground part of the silo body placed underground when in use and an above-ground part of the silo body placed on the ground when used. The top of the body has a roof 2. In this embodiment, the height of the above-ground part of the silo body is the same as that of the underground part of the silo body. In other embodiments of the present invention, the height of the above-ground part of the silo body and the underground part of the silo body may also be inconsistent. Item 1 in the figure represents the silo wall of the above-ground part of the silo body.

It also includes a groundwater simulation box 13 and a refrigerator (not shown in the figure) that can adjust the temperature. The groundwater simulation box 13 is arranged in the refrigerator, and the water temperature in the groundwater simulation box is adjusted through the refrigerator to simulate the lower temperature in the real underground environment. groundwater. The water temperature in the groundwater simulation box is controlled at 13~15℃.

There is a cooling and heat exchange tube 11 in the above-ground part of the warehouse, and the cooling and heat exchange tube 11 is arranged along the inner wall of the above-ground part of the warehouse body. The water outlet of the heat pipe, the groundwater simulation box 13 is connected with the cooling and heat exchange pipe through a waterway, and the waterway includes a water inlet waterway connected between the bottom of the groundwater simulation box and the water inlet of the heat exchange pipe, and a waterway connected to the top of the groundwater simulation box and the outlet of the heat exchange pipe. A water pump 14 is arranged on the return water channel between the nozzles and the water inlet channel.

In this embodiment, the cooling and heat exchange tubes 11 are PB tubes, and the tube spacing is between 15 and 20 times the tube diameter.

The above-ground part of the silo body is provided with a vent 4 and an air conditioner. The air conditioner includes a refrigerator 5 and a heat exchange box 17. The heat exchange box includes a heat exchange box with an air inlet 3 and an air outlet 20. , the upper end of the heat exchange box body is provided with a heat exchange box water inlet 16, the lower end of the heat exchange box box is provided with a heat exchange box water outlet 18, and the heat exchange box air inlet 3 is arranged on the left side of the heat exchange box. The air outlet 20 is arranged on the right side of the heat exchange box.

The water inlet 16 of the heat exchange box is connected to the upper end of the water inlet waterway, and the water outlet of the heat exchange box is directly connected to the cooling heat exchange tube 11, so that the water from the water outlet 18 of the heat exchange box flows back to the groundwater simulation tank through the cooling heat exchange tube 11. 13. When the water flows through the water inlet of the heat exchange box to the water outlet of the heat exchange box, a cooling water curtain 19 is formed for the air flow between the air inlet of the heat exchange box and the air outlet of the heat exchange box. The air flow of the air inlet 3 and the air outlet 20 of the heat exchange box is vertical, and the air outlet 20 of the heat exchange box is connected to the air inlet of the refrigerator 5 .

The air outlet of the refrigerator is connected with an air supply box 6 through an air pipe 9, and the air supply box has a spherical air outlet 10 with adjustable air outlet direction. A drying chamber can be arranged on the ventilation pipe 9 to prevent water vapor from entering the granary.

The semi-underground granary cooling experiment platform also includes a solar power supply device. The solar power supply device includes a solar cell panel 7 and a battery 8 electrically connected to the solar cell panel 7. The solar cell panel 7 is arranged on the top of the silo on the ground part of the silo body. The air conditioning unit and the water pump are powered. In the specific setting, the DC power output by the battery is converted into AC power by the inverter and then used for the water pump and the refrigerator of the air conditioner. Due to the uncontrollable weather, the power generation may not be able to meet the daily use. The water pump and air conditioner should also be connected to the power grid company, and the grid electricity meter should be set to two-way metering, and the grid electricity will be used after the photovoltaic power is used up. The refrigerator and the water pump are placed in the direction close to the battery to reduce power loss and reduce the cost of wiring.

A solar panel mounting bracket is arranged on the top of the above-ground part of the silo. The solar panel 7 is mounted on the solar panel mounting bracket through an angle adjustment mechanism. The solar panel mounting bracket makes the installation orientation and pitch angle of the solar panel adjustable. In this experimental platform, the angle between the photovoltaic panels and the ground is 34.76°, and the size of the photovoltaic panels is 1.635m ² (0.991m×1.650m). Underground granary area. In other embodiments of the present invention, the solar cell panel may not be installed on the roof of the above-ground part of the silo body.

The semi-underground granary cooling experiment level also includes a temperature monitoring system. The middle of the semi-underground granary is provided with vertically arranged sensor installation rods. The temperature sensors 12 included in the temperature monitoring system are divided into central temperature sensors and edge temperature sensors. The central temperature sensors are distributed in The upper part, the middle part and the lower part of the sensor installation rod, and the edge temperature sensors are evenly arranged on the inner side of the silo wall of the semi-underground granary along the circumferential direction.

The experimental platform in the present invention is mainly used to study the impact on energy consumption after using groundwater and supporting cooling structures. cooling needs. Taking advantage of the physical property of absorbing surrounding heat during the evaporation of water vapor, a cooling water curtain, also known as a wet curtain, is installed at the air inlet channel of the refrigerator. When the air passes through the wet curtain, the heat is absorbed and the air temperature is lowered by 5-8°C. The air whose temperature has been lowered is sent into the granary through the refrigerator and the air supply box 6 to reduce the temperature in the granary. Since the airflow passing through the cooling water curtain contains a lot of water vapor, it will evaporate again, further reducing the temperature, which can be reduced by more than 10 °C in dry areas. The temperature of the water after heat exchange with the air will rise. At this time, the water with a higher temperature is sent to the groundwater simulation tank 13 through the cooling heat exchange tube 11, and the temperature of the high-temperature water is lowered by using its stable low-temperature environment, and the temperature is lowered. The water can enter the cooling heat exchange tube 11 through the water pump 14 to cool the granary silo body. In this way, a circulation loop for the exchange of cold and hot energy will be formed.

The upper, middle and lower temperature sensors of the silo wall are evenly distributed along the vertical direction of the silo wall to collect the temperature of the upper, middle and lower parts of the silo; and three centers are set on the sensor installation rod at the center of the silo bottom. The temperature sensor collects the temperature in the middle of the grain. According to the temperature data collected by the temperature sensor, adjust the direction of the spherical air outlet, and focus on cooling the high temperature position.

The groundwater simulation box simulates underground cold water. The groundwater passes through the cooling heat exchange pipe surrounding the inner wall of the granary and transfers heat to the granary to cool down. When the wind passes through the cooling water curtain, the heat energy of the air is taken away, the temperature of the falling water rises, and the heated water flows back to the groundwater simulation tank through the cooling heat exchange pipe, thus forming a circulation loop. The refrigerator is connected to the air supply box. The air supply box adopts a spherical 360-degree adjustable spherical air outlet, and the air volume is evenly distributed. Through the temperature monitoring system, it is found that the area with higher temperature can be concentrated to supply air, which can effectively cool the grain surface, and then pass through the roof of the warehouse. The air outlet removes the hot air, realizes the use of green energy to store grain at low temperature, saves energy and reduces emissions.

After experiments, the granary using groundwater circulation cooling and supporting refrigerator cooling can greatly save energy consumption and achieve a good cooling effect compared with the traditional granary. The invention effectively utilizes the underground low temperature conditions. On the one hand, the grain in the underground part of the warehouse is not easily affected by the unfavorable factors of external natural conditions, and the grain temperature is stable at 15-20 DEG C all the year round, which can effectively inhibit the breeding damage of stored grain pests and microorganisms. Controlling the respiration intensity of the grains and delaying the deterioration of the quality of the stored grains; on the other hand, the cooling and heat exchange pipes used to cool the granary are connected to underground low-temperature water. Also kept at around 20°C. At the same time, the cooling water curtain generated by groundwater is used to cool and humidify the air inlet of the refrigerator, which can further save energy consumption.

The high temperature in the above-ground part of the semi-underground warehouse has many influences. The main reason is the effect of direct sunlight. In the actual project, photovoltaic panels are used to cover at least 80% of the area of the warehouse body. At the same time, the direct sunlight on the granary is further reduced, the temperature in the silo is lowered, and the power consumption for cooling is reduced while increasing the power.

In the above description of this specification, unless otherwise expressly specified and limited, terms such as "fixed", "installed", "connected" or "connected" should be construed in a broad sense. For example, with regard to the term "connection", it may be a fixed connection, a detachable connection, or an integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium , or it can be a communication within two elements or an interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

From the above description of this specification, those skilled in the art can also understand the following terms such as "upper", "lower", "front", "rear", "left", "right", "length", "width" ", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", " Terms indicating orientation or positional relationship, such as longitudinal, lateral, clockwise, or counterclockwise, are based on the orientation or positional relationship shown in the drawings of this specification, which are only for the convenience of explaining the solution of the present invention For the purpose of simplifying the description, it is not expressly or implied that the device or element involved must have the specific orientation, be constructed and operate in the specific orientation, so the above-mentioned orientation or positional relationship terms should not be understood or interpreted as Limitations to the scheme of the present invention.

In addition, terms such as "first" or "second" used in this specification to refer to numbers or ordinal numbers are only for descriptive purposes, and should not be construed as expressing or implying relative importance or implicitly indicating the indicated the number of technical characteristics. Thus, a feature defined as "first" or "second" may expressly or implicitly include at least one of that feature. In the description of the present specification, "plurality" means at least two, such as two, three or more, etc., unless expressly and specifically defined otherwise.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a semi-underground granary cooling experiment platform based on groundwater circulation cooling which characterized in that: including having the half underground granary in the ground part storehouse body and the underground part storehouse body, still include groundwater simulation case, be provided with the cooling heat exchange tube on the inner wall in the ground part storehouse body, groundwater simulation case passes through the water route and links to each other with the cooling heat exchange tube, and the water route is provided with the water pump including connecting intake water route and return water route between groundwater simulation case and the cooling heat exchange tube on the intake water route, is provided with vent and air conditioning equipment on the ground part storehouse body.

2. The semi-underground grain bin cooling experiment platform of claim 1, wherein: the cooling heat exchange tubes are arranged along the inner wall of the overground part of the bin body in a surrounding mode.

3. The semi-underground granary cooling experiment platform according to claim 1, wherein: the semi-underground granary cooling experiment platform further comprises a solar power supply device, the solar power supply device comprises a solar cell panel and a battery electrically connected with the solar cell panel, the solar cell panel is arranged at the top of the overground part of the granary body, and the battery supplies power to the air conditioning device and the water pump.

4. The semi-underground grain bin cooling experiment platform of claim 3, wherein: the top of the overground part storehouse body is provided with a solar cell panel mounting bracket, the solar cell panel is mounted on the solar cell panel mounting bracket through an angle adjusting mechanism, and the solar cell panel mounting bracket enables the mounting orientation and the pitch angle of the solar cell panel to be adjustable.

5. The semi-underground granary cooling experiment platform according to claim 1, wherein: the height of the cabin body of the overground part is the same as that of the cabin body of the underground part.

6. The semi-underground grain bin cooling experiment platform of claim 1, wherein: the semi-underground granary cooling experiment platform further comprises a refrigerator capable of adjusting temperature, and the underground water simulation box is arranged in the refrigerator.

7. The semi-underground grain bin cooling experiment platform of claim 1, wherein: the semi-underground granary cooling experiment platform further comprises a temperature monitoring system, the middle part of the semi-underground granary is provided with a sensor installation rod which is vertically arranged, the temperature monitoring system comprises a central temperature sensor and edge temperature sensors, the central temperature sensors are distributed on the upper part, the middle part and the lower part of the sensor installation rod, and the edge temperature sensors are uniformly arranged on the inner side of the granary wall of the semi-underground granary along the circumferential interval.

8. The semi-underground granary cooling experimental platform according to any one of claims 1 to 7, wherein: air conditioning equipment includes refrigerator and heat transfer case, and the heat transfer case is including the heat transfer case box that has heat transfer case air intake, heat transfer case air outlet, and the upper end of heat transfer case box is provided with heat transfer case water inlet, and the lower extreme of heat transfer case box is provided with heat transfer case delivery port, heat transfer case water inlet, heat transfer case delivery port respectively through correspond the water pipe with groundwater simulation case links to each other, and the in-process stroke that rivers passed through heat transfer case water inlet flow direction heat transfer case delivery port supplies the cooling cascade that the air current crossed between heat transfer case air intake, the heat transfer case air outlet, and the heat transfer case air outlet links to each other with the air intake of refrigerator.

9. The semi-underground grain bin cooling experimental platform of claim 8, wherein: the air outlet of the refrigerator is connected with an air supply box, and the air supply box is provided with a spherical air outlet with adjustable air outlet direction.

10. The semi-underground grain bin cooling experimental platform of claim 8, wherein: the water outlet of the heat exchange box flows back to the underground water simulation box through the cooling heat exchange tube.

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