Centralized intelligent agricultural environmental control system and control method thereof

Abstract

The invention provides a centralized intelligent agricultural environmental control system, which comprises an energy supply system body, an air supply system body and a transfer cabin, and is characterized in that the energy supply system body and the air supply system body are respectively connected to a power plant heat source and a flue gas source, and heat and cold are supplied to an intelligent agricultural greenhouse through the transfer cabin, and CO2 is conveyed to the intelligent agricultural greenhouse. The invention further provides a control method of the centralized intelligent agricultural environment control system. According to the centralized intelligent agricultural environmental control system, hot water resources of a power plant can be fully utilized to be coupled with a cold supply system, the energy utilization efficiency is improved, and the investment cost and energy consumption of the intelligent agricultural environmental control system are reduced; the flue gas source of the power plant is used as the CO2 gas source of the intelligent agricultural greenhouse, waste can be turned into wealth, the energy utilization efficiency of the power plant can be improved, and the investment cost of an intelligent agricultural environment control system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of smart agriculture and comprehensive energy utilization, and in particular to a centralized smart agriculture environmental control system and a control method thereof. Background Art

[0002] China is a large agricultural country, and agricultural intelligence is the goal of agricultural modernization. The new smart agricultural greenhouse has a great impact on the indoor temperature and humidity environment and CO 2 The power plant not only has abundant hot water resources, but also has high requirements for the supply of CO required by smart agricultural greenhouses. 2 The existing technology lacks direct utilization of power plant flue gas, and most of them are directly discharged into the air. If the power plant resources are fully utilized, it can not only turn waste into treasure, but also improve the energy utilization efficiency of the power plant and reduce the investment cost of the smart agricultural environmental control system. Summary of the invention

[0003] To solve the above problems, the present invention aims to propose a centralized smart agricultural environmental control system and a control method thereof, which can make full use of the hot water resources of the power plant and couple with the cooling system to improve the energy utilization efficiency and reduce the investment cost and energy consumption of the smart agricultural environmental control system; using the flue gas source of the power plant as the CO2 gas source for the smart agricultural greenhouse can not only turn waste into treasure, but also improve the energy utilization efficiency of the power plant and reduce the investment cost of the smart agricultural environmental control system.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A centralized smart agricultural environmental control system includes an energy supply system body, an air supply system body and a transfer cabin. The energy supply system body and the air supply system body are respectively connected to the heat source of the power plant and the flue gas source, and the heat and cooling and CO2 transport to the smart agricultural greenhouse through the transfer cabin. 2 .

[0006] Furthermore, the air supply system body includes a gas scrubber, an air handling unit, a fabric air duct and a CO 2 The flue gas source of the power plant is treated by the gas scrubber and then passes through the CO 2 The pipeline is sent to the transfer cabin where the air handling unit is located, CO 2 The conveying pipeline is provided with an electric regulating valve F7, the fabric air duct is evenly distributed with air supply holes, and the transfer cabin is provided with a CO 2 Concentration sensor and temperature and humidity sensor.

[0007] Furthermore, the energy supply system body includes at least one plate heat exchanger unit, and the primary side of the plate heat exchanger unit is connected to the hot water supply and hot water return of the power plant through valve F6 and pipelines respectively. The secondary side of the plate heat exchanger unit is connected to the energy supply main pipe and the energy supply return main pipe through the hot water supply mother pipe and the hot water return mother pipe in cooperation with the hot water pump and valve F5. The ends of the energy supply main pipe and the energy return main pipe are connected to the air handling unit in the transfer cabin.

[0008] Furthermore, the energy supply system body also includes at least one air-cooled screw heat pump unit, one end of the air-cooled screw heat pump unit is connected between the energy supply return main pipe and the hot water return main pipe through a chilled water pump, valve F2, and a cold water return main pipe, and the other end is connected between the energy supply main pipe and the hot water supply main pipe through a cold water supply main pipe.

[0009] Furthermore, the energy supply system body also includes at least one centrifugal chiller and a cooling tower. One end of the centrifugal chiller is connected to the cooling tower through a cooling water pipe and a cooling water pump, and the other end of the centrifugal chiller is also connected in parallel to the energy supply water main and the energy supply return water main through a chilled water pump in conjunction with valve F1, a cold water supply main pipe and a cold water return main pipe and an air-cooled screw heat pump unit.

[0010] In order to achieve the above-mentioned objectives, the present invention also provides a control method for a centralized smart agricultural environmental control system, including four energy supply modes. The first energy supply mode is that the unit where the centrifugal chiller is located provides cooling alone; the second energy supply mode is that the unit where the centrifugal chiller is located provides cooling together with the unit where the air-cooled screw heat pump unit is located; the third energy supply mode is that the unit where the plate heat exchanger is located provides heating alone; and the fourth energy supply mode is that the unit where the air-cooled screw heat pump unit is located provides heating alone.

[0011] Furthermore, when the air supply system delivers the treated air to the smart agricultural greenhouse, a CO 2 Concentration sensors and temperature and humidity sensors are used to monitor the CO2 sent into the smart agricultural greenhouse. 2 concentration, temperature and humidity, and CO is controlled by adjusting the opening of the electric control valve F7. 2 Concentration control, controlling the CO in the transfer chamber through the energy supply system 2 Temperature and humidity.

[0012] Furthermore, in the first energy supply mode, the unit where the air-cooled screw heat pump unit is located and the unit where the plate heat exchanger unit is located are shut down, and the chilled water return water flowing out of the air handling unit returns to the centrifugal chiller under the action of the chilled water pump for cooling before being supplied to the air handling unit.

[0013] Furthermore, in the second energy supply mode, the unit where the plate heat exchanger unit is located is shut down, and the hot water return water flowing out of the air handling unit is returned to the centrifugal chiller and the air-cooled screw heat pump unit under the action of the chilled water pump for cooling before being supplied to the air handling unit.

[0014] Furthermore, in the third energy supply mode, the unit where the centrifugal chiller is located and the unit where the air-cooled screw heat pump unit is located are shut down, and the hot water return water flowing out of the air handling unit returns to the plate heat exchanger unit under the action of the hot water pump for heat exchange with the hot water from the primary power plant before being supplied to the air handling unit; in the fourth energy supply mode, the unit where the centrifugal chiller is located and the unit where the plate heat exchanger unit is located are shut down, and the hot water return water flowing out of the air handling unit returns to the air-cooled screw heat pump unit under the action of the hot water pump for heat exchange before being supplied to the air handling unit.

[0015] Beneficial effects: The centralized smart agricultural environmental control system of the present invention can make full use of the hot water resources of the power plant and couple with the cooling system, improve energy utilization efficiency, and reduce the investment cost and energy consumption of the smart agricultural environmental control system; using the flue gas source of the power plant as the CO2 gas source of the smart agricultural greenhouse can not only turn waste into treasure, but also improve the energy utilization efficiency of the power plant and reduce the investment cost of the smart agricultural environmental control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a centralized smart agricultural environmental control system according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the process of the centralized smart agricultural environmental control system in the first energy supply mode according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the flow of the centralized smart agricultural environmental control system in the second energy supply mode according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the process of the centralized smart agricultural environmental control system in the third energy supply mode according to an embodiment of the present invention;

[0021] Figure 5 This is a flow chart of the centralized smart agricultural environmental control system in the fourth energy supply mode described in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] Example 1

[0025] See also Figure 1 A centralized smart agricultural environmental control system includes an energy supply system body, an air supply system body and a transfer cabin. The energy supply system body and the air supply system body are respectively connected to the heat source of the power plant and the flue gas source, and the transfer cabin is used to heat, cool and transport CO2 to the smart agricultural greenhouse. 2 .

[0026] The centralized smart agricultural environmental control system of this embodiment can make full use of the hot water resources of the power plant and couple with the cooling system to improve energy utilization efficiency and reduce the investment cost and energy consumption of the smart agricultural environmental control system; it uses the flue gas source of the power plant as the CO2 source of the smart agricultural greenhouse. 2 Gas sources can not only turn waste into treasure, but also improve the energy utilization efficiency of power plants and reduce the investment cost of smart agricultural environmental control systems.

[0027] In a specific example, the air supply system body includes a gas scrubber 8, an air handling unit 9, a fabric air duct 10 and a CO 2 The flue gas source of the power plant is processed by the gas scrubber 8 and then passes through the CO 2 The delivery pipeline 14 is sent to the transfer cabin where the air handling unit 9 is located, CO 2 The conveying pipeline 14 is provided with an electric regulating valve F7, the fabric air duct 10 is evenly distributed with air supply holes 11, and the transfer cabin is provided with a CO 2 Concentration sensor 21 and temperature and humidity sensor 22 .

[0028] The flue gas source of the power plant in this embodiment is delivered to the smart agricultural greenhouse through the air supply holes on the fabric air duct. The air handling unit, the fabric air duct and its air supply holes constitute an air supply unit. The CO 2 Concentration sensors and temperature and humidity sensors can control the CO2 sent into the smart agricultural greenhouse by the air supply unit. 2 concentration, temperature and humidity to improve adaptability.

[0029] In a specific example, the energy supply system body includes at least one plate heat exchanger unit 6, and the primary side of the plate heat exchanger unit 6 is connected to the hot water supply and hot water return of the power plant through valve F6 and pipelines respectively. The secondary side of the plate heat exchanger unit 6 is connected to the energy supply water main pipe 12 and the energy supply return water main pipe 13 through the hot water supply mother pipe 18 and the hot water return mother pipe 17 in cooperation with the hot water pump 7 and valve F5. The ends of the energy supply water main pipe 12 and the energy return water main pipe 13 are connected to the air handling unit 9 in the transfer cabin.

[0030] In this embodiment, the plate heat exchanger unit cooperates with the hot water pump to not only provide hot water, but also regulate the CO in the air handling unit to a certain extent. 2 The temperature of the air source can improve the adaptability of the smart agricultural greenhouse.

[0031] In a specific example, the energy supply system body also includes at least one air-cooled screw heat pump unit 5, one end of the air-cooled screw heat pump unit 5 is connected between the energy supply return main pipe 13 and the hot water return main pipe 17 through a chilled water pump 4 in conjunction with a valve F2 and a cold water return main pipe 15, and the other end is connected between the energy supply water main pipe 12 and the hot water supply main pipe 18 through a cold water supply main pipe 16.

[0032] In a specific example, the energy supply system body also includes at least one centrifugal chiller 3 and a cooling tower 1. One end of the centrifugal chiller 3 is connected to the cooling tower 1 through a cooling water pipe and a cooling water pump 2. The other end of the centrifugal chiller 3 is also connected in parallel to the energy supply water main 12 and the energy supply return water main 13 through a chilled water pump 4 in conjunction with a valve F1, a cold water supply main pipe 16 and a cold water return main pipe 15 and an air-cooled screw heat pump unit 5.

[0033] It should be noted that the energy supply water main pipe and energy supply return water main pipe of this embodiment include a trunk and two parallel branches, one parallel branch is a cold water supply main pipe and a cold water return main pipe, and one parallel branch is a hot water supply main pipe and a hot water return main pipe, which are respectively provided with electric switch valves F3 and F4;

[0034] In this embodiment, the cooling tower, cooling water pump, centrifugal chiller and refrigerating water pump correspond to each other to form a cooling unit, the refrigerating water pump and the air-cooled screw heat pump unit correspond to each other to form a cooling / heating unit, and the plate heat exchanger unit and the hot water pump correspond to each other to form a heating unit; an electric regulating valve is provided in front of the water pump in each cooling unit / heating unit, and the number of units in operation is determined according to the needs of the smart agricultural greenhouse.

[0035] Example 2

[0036] In order to achieve the above-mentioned purpose, the present embodiment also provides a control method for a centralized smart agricultural environmental control system, including four energy supply modes. The first energy supply mode is that the unit where the centrifugal chiller 3 is located provides cooling alone; the second energy supply mode is that the unit where the centrifugal chiller 3 and the air-cooled screw heat pump unit 5 are located provide combined cooling; the third energy supply mode is that the unit where the plate heat exchanger 6 is located provides heating alone; and the fourth energy supply mode is that the unit where the air-cooled screw heat pump unit 5 is located provides heating alone.

[0037] It should be noted that in cooling conditions, the first energy supply mode is preferred; when all centrifugal chillers are fully started in the first energy supply mode and still cannot meet the cooling demand of the smart agricultural greenhouse, the second energy supply mode is switched. In heating conditions, when the outdoor temperature is low and the power plant hot water source begins to supply, the third energy supply mode is used; in transition seasons, when the power plant hot water source is suspended, the fourth energy supply mode is used.

[0038] In the specific implementation, when the air supply system body delivers the processed air to the smart agricultural greenhouse, the transfer cabin where the air handling unit 9 is located is equipped with a CO 2 The concentration sensor 21 and the temperature and humidity sensor 22 are used to monitor the CO2 sent into the smart agricultural greenhouse. 2 concentration, temperature and humidity, and CO is controlled by adjusting the opening of the electric control valve F7. 2 Concentration control, controlling the CO in the transfer chamber through the energy supply system 2 Temperature and humidity.

[0039] In the specific implementation, Figure 2 As shown, in the first energy supply mode, the cooling tower 1, cooling water pump 2, centrifugal chiller 3, refrigerated water pump 4, gas scrubber 8 and air handling unit 9 are in operation, and the air-cooled screw heat pump unit 5, plate heat exchanger unit 6 and hot water pump 7 are not involved in the operation. The electric switch valve F2 is disconnected to cut off the cooling unit where the air-cooled screw heat pump unit 5 is located from the cold water return main pipe 15, the electric switch valves F4 and F5 are disconnected to cut off the hot water return main pipe 17 connected to the plate heat exchanger unit 6, and the electric switch valve F6 is disconnected to cut off the power plant hot water supply main pipe 20 connected to the plate heat exchanger unit 6. The chilled water return water flowing out of the air handling unit 9 returns to the centrifugal chiller 3 under the action of the refrigerated water pump 4 for cooling before being supplied to the air handling unit 9.

[0040] In the specific implementation, Figure 3As shown, in the second energy supply mode, the cooling tower 1, cooling water pump 2, centrifugal chiller 3, refrigerated water pump 4, air-cooled screw heat pump unit 5, gas scrubber 8 and air handling unit 9 are in operation, and the plate heat exchanger unit 6 and hot water pump 7 are not involved in the operation. The electric switch valves F4 and F5 are disconnected to cut off the hot water return main pipe 17 connected to the plate heat exchanger unit 6, and the electric switch valve F6 is disconnected to cut off the power plant hot water supply main pipe 20 connected to the plate heat exchanger unit 6. The chilled water return water flowing out of the air handling unit 9 returns to the centrifugal chiller 3 and the air-cooled screw heat pump unit 5 under the action of the refrigerated water pump 4 for cooling before being supplied to the air handling unit 9.

[0041] In the specific implementation, Figure 4 As shown, in the third energy supply mode, the plate heat exchanger 6, the hot water pump 7, the gas scrubber 8 and the air handling unit 9 are in operation, and the cooling tower 1, the cooling water pump 2, the centrifugal chiller 3, the chilled water pump 4 and the air-cooled screw heat pump unit 5 are not involved in the operation. The electric switch valves F1, F2 and F3 are disconnected to cut off the cold water return main pipe 15 connected to the cooling unit where the centrifugal chiller 3 and the air-cooled screw heat pump unit 5 are located. The hot water return water flowing out of the air handling unit 9 returns to the plate heat exchanger 6 under the action of the hot water pump 5, exchanges heat with the hot water of the primary power plant, and then supplies it to the air handling unit 9.

[0042] In the specific implementation, Figure 5 As shown, in the fourth energy supply mode, the chilled water pump 4 and the air-cooled screw heat pump unit 5, the gas scrubber 8 and the air handling unit 9 are in operation, and the cooling tower 1, the cooling water pump 2, the centrifugal chiller 3, the plate heat exchanger 6 and the hot water pump 7 are not involved in the operation. The electric switch valve F1 is disconnected to cut off the cooling unit where the centrifugal chiller 3 is located from the cold water return main pipe 15, the electric switch valves F4 and F5 are disconnected to cut off the hot water return main pipe 17 connected to the plate heat exchanger 6, and the electric switch valve F6 is disconnected to cut off the power plant hot water supply main pipe 20 connected to the plate heat exchanger 6. The hot water return water flowing out of the air handling unit 9 returns to the air-cooled screw heat pump unit 5 under the action of the chilled water pump 4 for heat exchange and then is supplied to the air handling unit 9.

[0043] The valve opening conditions under different cooling or heating modes are shown in the following table:

[0044]

[0045] The electric control valve F7 is normally open, and the valve opening is adjusted according to the CO2 concentration monitored by the CO2 concentration sensor A21.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized smart agricultural environmental control system, characterized in that: It includes an energy supply system body, an air supply system body and a transfer cabin. The energy supply system body and the air supply system body are respectively connected to the heat source of the power plant and the flue gas source, and provide heating, cooling and transport CO2 to the smart agricultural greenhouse through the transfer cabin.

2. The centralized smart agricultural environmental control system according to claim 1 is characterized in that: The air supply system body comprises a gas scrubber (8), an air handling unit (9), a fabric air duct (10) and a CO2 delivery pipeline (14). The flue gas source of the power plant is treated by the gas scrubber (8) and then delivered to the transfer cabin where the air handling unit (9) is located through the CO2 delivery pipeline (14). An electric regulating valve F7 is provided on the CO2 delivery pipeline (14). Air supply holes (11) are evenly distributed on the fabric air duct (10). A CO2 concentration sensor (21) and a temperature and humidity sensor (22) are provided in the transfer cabin.

3. The centralized smart agricultural environmental control system according to claim 2 is characterized in that: The energy supply system body comprises at least one plate heat exchanger (6), the primary side of the plate heat exchanger (6) is connected to the hot water supply and hot water return of the power plant through valve F6 and pipelines respectively, the secondary side of the plate heat exchanger (6) is connected to the energy supply main pipe (12) and the energy supply return main pipe (13) through the hot water supply main pipe (18) and the hot water return main pipe (17) in cooperation with the hot water pump (7) and valve F5, and the ends of the energy supply main pipe (12) and the energy return main pipe (13) are connected to the air handling unit (9) in the transfer cabin.

4. The centralized smart agricultural environmental control system according to claim 3 is characterized in that: The energy supply system body also includes at least one air-cooled screw heat pump unit (5), one end of which is connected between the energy supply water return main pipe (13) and the hot water return main pipe (17) through a chilled water pump (4) in conjunction with a valve F2 and a cold water return main pipe (15), and the other end of which is connected between the energy supply water main pipe (12) and the hot water supply main pipe (18) through a cold water supply main pipe (16).

5. The centralized smart agricultural environmental control system according to claim 4 is characterized in that: The energy supply system body also includes at least one centrifugal chiller (3) and a cooling tower (1). One end of the centrifugal chiller (3) is connected to the cooling tower (1) via a cooling water pipeline and a cooling water pump (2). The other end of the centrifugal chiller (3) is also connected in parallel to the energy supply main pipe (12) and the energy return main pipe (13) with the air-cooled screw heat pump unit (5) through a chilled water pump (4) in conjunction with a valve F1, a cold water supply main pipe (16) and a cold water return main pipe (15).

6. A control method for a centralized smart agricultural environmental control system according to any one of claims 1 to 5, characterized in that: Four energy supply modes are included. The first energy supply mode is that the unit where the centrifugal chiller (3) is located provides cooling alone; the second energy supply mode is that the unit where the centrifugal chiller (3) is located provides cooling together with the unit where the air-cooled screw heat pump unit (5) is located; the third energy supply mode is that the unit where the plate heat exchanger unit (6) is located provides heating alone; and the fourth energy supply mode is that the unit where the air-cooled screw heat pump unit (5) is located provides heating alone.

7. The control method of the centralized intelligent agricultural environmental control system according to claim 6 is characterized in that: When the air supply system body delivers the processed air to the smart agricultural greenhouse, a CO2 concentration sensor (21) and a temperature and humidity sensor (22) are provided in the transfer cabin where the air handling unit (9) is located to monitor the CO2 concentration and the temperature and humidity delivered to the smart agricultural greenhouse. The CO2 concentration is controlled by adjusting the opening of the electric regulating valve F7, and the temperature and humidity of the CO2 in the transfer cabin are controlled by the energy supply system body.

8. The control method of the centralized intelligent agricultural environmental control system according to claim 6 is characterized in that: In the first energy supply mode, the unit where the air-cooled screw heat pump unit (5) is located and the unit where the plate heat exchange unit (6) is located are shut down, and the chilled water return water flowing out of the air handling unit (9) is returned to the centrifugal chiller (3) under the action of the chilled water pump (4) for cooling before being supplied to the air handling unit (9).

9. The control method of the centralized intelligent agricultural environmental control system according to claim 6, characterized in that: In the second energy supply mode, the unit where the plate heat exchanger unit (6) is located is shut down, and the hot water return water flowing out of the air handling unit (9) is returned to the centrifugal chiller unit (3) and the air-cooled screw heat pump unit (5) by the action of the chilled water pump (4) for cooling before being supplied to the air handling unit (9).

10. The control method of the centralized intelligent agricultural environmental control system according to claim 6, characterized in that: In the third energy supply mode, the unit where the centrifugal chiller (3) is located and the unit where the air-cooled screw heat pump unit (5) is located are shut down, and the hot water return water flowing out of the air handling unit (9) returns to the plate heat exchanger unit (6) under the action of the hot water pump (5) for heat exchange with the hot water of the primary power plant before being supplied to the air handling unit (9); in the fourth energy supply mode, the unit where the centrifugal chiller (3) is located and the unit where the plate heat exchanger unit (6) is shut down, and the hot water return water flowing out of the air handling unit (9) returns to the air-cooled screw heat pump unit (5) under the action of the hot water pump (5) for heat exchange before being supplied to the air handling unit (9).

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