Combined cold and hot water supply system integrating seawater desalination and plant factory

Abstract

The present application relates to the technical field of seawater desalination, and discloses a combined cold and hot water supply system integrating seawater desalination and a plant factory. In terms of water resources, a seawater supplementation device and a seawater distillation device can provide a planting unit with a stable supply of fresh water serving as a planting water source and makeup water for a water circulation system, thereby solving the problem of dependency of the planting unit on water resources. In addition, waste water generated by the planting unit during production can flow into the seawater supplementation device to continue serving as raw water for seawater desalination, thereby implementing recycling of water resources. In terms of energy, the seawater supplementation device and the seawater distillation device can enable part of generated fresh water to flow into a cooling and heating supply subsystem through water supplementation and chemicals loading devices for use, and the heating and cooling supply subsystem can cool LED lights within a plant cultivation subsystem and then use waste heat from the cooled LED lights to provide a heat source for the seawater distillation device, thereby effectively improving the energy utilization efficiency of both the heating and cooling supply subsystem and the seawater distillation device.

Description

A combined hot and cold water supply system integrating seawater desalination and plant factory

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410967211.6, filed on July 18, 2024, entitled "A Combined Hot and Cold Water Supply System Integrating Seawater Desalination and Plant Factory", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of seawater desalination technology, specifically to a combined hot and cold water supply system that integrates seawater desalination and plant factory. Background Technology

[0004] Seawater desalination removes salt and other impurities from seawater to produce water suitable for human life and production. With increasing global water scarcity, seawater desalination technology has received widespread attention and application in many coastal countries and regions. Its development shows a steady upward trend, with more and more seawater desalination projects being implemented worldwide.

[0005] A plant factory is a highly efficient agricultural system that utilizes modern biotechnology, environmental control technology, and mechanical automation to achieve continuous year-round plant production. It provides optimal growth conditions for plants within an indoor environment by precisely controlling factors such as light, temperature, humidity, and carbon dioxide concentration. The development of plant factories is primarily driven by the demands for food safety, resource conservation, and environmental protection. Currently, plant factories are already in use and show promising development prospects.

[0006] However, both technologies face the problems of high energy consumption and resource costs, which hinders them from generating better economic and social benefits. Summary of the Invention

[0007] In view of this, this application provides a combined hot and cold water supply system that integrates seawater desalination and plant factories to solve the problems of high energy consumption and resource costs faced by both seawater desalination and plant factories.

[0008] In the first aspect, this application provides a combined hot and cold water supply system that integrates seawater desalination and plant factory, the system comprising: a water supply subsystem, a hot and cold water supply subsystem and a plant cultivation subsystem;

[0009] The water supply subsystem includes a seawater distillation unit, a seawater replenishment unit, a freshwater tank, a first water replenishment and chemical dosing unit, and a second water replenishment and chemical dosing unit; the plant cultivation subsystem includes planting units and LED lights.

[0010] The system includes a seawater replenishment device for supplying incoming seawater through pipelines to a seawater distillation device; a seawater distillation device for distilling the seawater to obtain freshwater, and supplying a portion of the freshwater to the planting unit and another portion to a freshwater tank; a freshwater tank for supplying the incoming portion to a heating and cooling supply subsystem via a first water replenishment and dosing device and a second water replenishment and dosing device; a planting unit for using the incoming freshwater for production and supplying wastewater to the seawater replenishment device; and a heating and cooling supply subsystem for cooling LED lights and using the waste heat from the cooled LED lights to provide a heat source for the seawater distillation device.

[0011] The combined hot and cold water supply system for seawater desalination and plant factories provided in this application addresses the issue of water resource dependence by providing a stable source of fresh water for the planting unit and the water circulation system through a seawater replenishment and distillation unit within the water supply subsystem. Furthermore, wastewater generated during the planting process can flow into the seawater replenishment unit to continue as raw water for desalination, achieving water resource recycling. In terms of energy, a portion of the freshwater generated by the seawater replenishment and distillation units within the water supply subsystem flows into the hot and cold water supply subsystem via a first and second replenishment and dosing unit. Simultaneously, the hot and cold water supply subsystem cools the LED lights within the plant planting subsystem, utilizing the waste heat from the cooled LED lights to provide a heat source for the seawater distillation unit, effectively improving the energy efficiency of both systems. Therefore, by implementing this application, the organic integration of seawater desalination and plant factories in terms of energy and water supply is achieved, enhancing the energy and resource utilization efficiency of both applications.

[0012] In one optional embodiment, the water supply subsystem further includes: a concentrated wastewater treatment device; and a seawater distillation device, which is also used to distill raw seawater to obtain concentrated wastewater, and to flow the concentrated wastewater into the concentrated wastewater treatment device through a pipeline for treatment.

[0013] The combined hot and cold water supply system for seawater desalination and plant factories provided in this application can also treat the concentrated wastewater generated by the seawater distillation unit through a concentrated wastewater treatment device, thereby reducing pollution.

[0014] In one optional implementation, the heating and cooling supply subsystem includes: a first water pump and a first heat exchanger; the first water pump is used to pump the incoming seawater through a pipeline into the first heat exchanger; the first heat exchanger is used to heat the incoming seawater according to the incoming secondary water.

[0015] The combined hot and cold water supply system integrating seawater desalination and plant factory provided in this application can perform heat exchange and cooling treatment on the seawater and secondary water flowing into the first heat exchanger by setting up a first heat exchanger connected to the first water pump.

[0016] In one alternative implementation, the heating and cooling supply subsystem further includes: a second heat exchanger, a solar energy storage tank, a second water pump, and a third water pump;

[0017] The first heat exchanger is also used to cool the incoming secondary water based on the incoming raw seawater, and a portion of the cooled secondary water flows into the second heat exchanger through the third water pump and LED lights; the second heat exchanger is used to exchange heat between the incoming seawater heat source water and a portion of the secondary water, and the heat-exchanged seawater heat source water flows into the solar heat storage tank. The seawater heat source water is pre-stored in the seawater distillation device and flows into the second heat exchanger through a pipeline; the solar heat storage tank is used to heat the incoming seawater heat source water, and the heated seawater heat source water flows into the seawater distillation device through the second water pump.

[0018] The combined hot and cold water supply system for seawater desalination and plant factories provided in this application can exchange heat with a portion of the cooled secondary water through a second heat exchanger, and then heat it through a solar thermal storage tank to serve as a heat source for the seawater distillation device, thereby improving energy utilization efficiency.

[0019] In one optional embodiment, the second heat exchanger is further used to exchange heat between the incoming seawater heat source water and a portion of the secondary water, and to allow the heat-exchanged secondary water to flow into the first heat exchanger.

[0020] The combined hot and cold water supply system for seawater desalination and plant factories provided in this application can also return the heat-exchanged secondary water to the first heat exchanger through the third heat exchanger, thus achieving circulation.

[0021] In one optional implementation, the heating and cooling supply subsystem further includes: a third heat exchanger, a chiller unit, a fourth water pump, a wind wall heat exchanger, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, and an eighth valve;

[0022] The fourth water pump is connected to both the chiller unit and the air wall heat exchanger, and the third heat exchanger is connected to the air wall heat exchanger. The third heat exchanger is connected in parallel to the chiller unit through the first valve, the second valve, the seventh valve, and the eighth valve. The third heat exchanger is also connected in parallel to the chiller unit through the third valve, the fourth valve, the fifth valve, and the sixth valve. The third heat exchanger is also connected to the first heat exchanger through the first valve and the second valve, and the third heat exchanger is also connected to the fourth water pump through the seventh valve and the eighth valve.

[0023] In one optional implementation, when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is greater than a preset threshold, the second, third, fifth, and eighth valves are opened, and the first, fourth, sixth, and seventh valves are closed; when the seawater temperature is higher than the ambient temperature of the planting unit, the first, fourth, and sixth valves are opened, and the second, third, fifth, seventh, and eighth valves are closed; when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is less than a preset threshold, the first, second, third, fourth, fifth, sixth, seventh, and eighth valves are opened.

[0024] The combined hot and cold water supply system integrating seawater desalination and plant factory provided in this application controls the opening and closing of eight valves by comparing the seawater temperature and the ambient temperature of the planting unit, thereby supporting the subsequent circulation and heat exchange of secondary and tertiary water.

[0025] In one optional embodiment, the first heat exchanger is further configured to, when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is greater than a preset threshold, circulate another portion of the cooled secondary water through a third water pump, a third heat exchanger, and a fourth water pump to exchange heat with the tertiary water, and then flow the heat-exchanged tertiary water into the wind wall heat exchanger; the wind wall heat exchanger is configured to use the flowing heat-exchanged tertiary water to regulate the internal air of the planting unit.

[0026] The hot and cold water supply system integrating seawater desalination and plant factory provided in this application opens the second, third, fifth, and eighth valves and closes the other valves when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is greater than a preset threshold. At this time, the first heat exchanger circulates the secondary water and tertiary water for heat exchange through the third water pump, the third heat exchanger, and the fourth water pump.

[0027] In one alternative implementation, the first heat exchanger is further configured to, when the seawater temperature is higher than the ambient temperature of the planting unit, circulate another portion of the cooled secondary water with the tertiary water through a third water pump, a chiller unit, and a fourth water pump for heat exchange, and then flow the heat-exchanged tertiary water into the wind wall heat exchanger.

[0028] The combined hot and cold water supply system integrating seawater desalination and plant factory provided in this application opens the first, fourth, and sixth valves and closes the other valves when the seawater temperature is higher than the ambient temperature of the planting unit. At this time, the first heat exchanger circulates the secondary water and tertiary water for heat exchange through the third water pump, the chiller unit, and the fourth water pump.

[0029] In one optional embodiment, the first heat exchanger is further configured to, when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is less than a preset threshold, first exchange another part of the cooled secondary water with the tertiary water through the third water pump, the third heat exchanger and the fourth water pump, then exchange the water with the tertiary water through the chiller unit for cooling, and then let the tertiary water flow into the wind wall heat exchanger.

[0030] The combined hot and cold water supply system integrating seawater desalination and plant factory provided in this application opens all eight valves when the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is less than a preset threshold. At this time, the first heat exchanger first exchanges heat between the secondary water and the tertiary water through the third water pump, the third heat exchanger and the fourth water pump, and then exchanges heat for cooling through the chiller unit. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 is a structural block diagram of a combined hot and cold water supply system integrating seawater desalination and plant factory according to an embodiment of this application;

[0033] Figure 2 is a schematic diagram of the operation principle of a combined hot and cold water supply system integrating seawater desalination and plant factory according to an embodiment of this application.

[0034] Figure 3 is another schematic diagram of the operating principle of the combined hot and cold water supply system integrating seawater desalination and plant factory according to an embodiment of this application;

[0035] Figure 4 is a schematic diagram of the heat exchange process between secondary water and tertiary water corresponding to working condition one according to an embodiment of this application;

[0036] Figure 5 is a schematic diagram of the heat exchange process between secondary water and tertiary water corresponding to working condition two according to the embodiment of this application;

[0037] Figure 6 is a schematic diagram of the heat exchange process between secondary water and tertiary water corresponding to operating condition three according to the embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] This application provides a combined hot and cold water supply system that integrates seawater desalination and plant factories. By organically integrating seawater desalination and plant factories in terms of energy and water supply, the system aims to improve the energy and resource utilization efficiency of both applications.

[0040] This embodiment provides a combined hot and cold water supply system integrating seawater desalination and plant factory, as shown in Figure 1. The combined hot and cold water supply system 20 integrating seawater desalination and plant factory includes: a water resource supply subsystem, a hot and cold supply subsystem, and a plant planting subsystem.

[0041] Optionally, the water supply subsystem includes: a seawater distillation unit 13, a seawater replenishment unit 15, a freshwater tank 17, a first water replenishment and dosing unit 18, a second water replenishment and dosing unit 19, and a concentrated wastewater treatment unit 16.

[0042] Optionally, the plant planting subsystem includes a planting unit 9 and LED lights 8. The number of LED lights 8 can be one or more, and can be set according to actual needs; in this embodiment, three LED lights 8 are used as an example.

[0043] Optionally, the heating and cooling supply subsystem includes: a first water pump 1, a first heat exchanger 2, a second heat exchanger 10, a solar thermal storage tank 11, a second water pump 12, a third water pump 3, a third heat exchanger 4, a chiller unit 5, a fourth water pump 6, a wind wall heat exchanger 7, a first valve F1, a second valve F2, a third valve F3, a fourth valve F4, a fifth valve F5, a sixth valve F6, a seventh valve F7, and an eighth valve F8.

[0044] Specifically, the various components mentioned above are connected by pipes.

[0045] Among them, the seawater distillation device 13 is connected to the seawater replenishment device 15, the concentrated wastewater treatment device 16, the second water pump 12, the second heat exchanger 10, the freshwater pool 17, and the planting unit 9, respectively.

[0046] Optionally, the freshwater pool 17 is also connected to the first water replenishment and dosing device 18 and the second water replenishment and dosing device 19 respectively; the planting unit 9 is also connected to the seawater replenishment device 15 and the LED light 8 respectively; the second heat exchanger 10 is also connected to the LED light 8, the solar heat storage tank 11 and the first heat exchanger 2 respectively; the solar heat storage tank 11 is also connected to the second water pump 12.

[0047] Optionally, the third water pump 3 is also connected to the LED light 8.

[0048] Optionally, the third water pump 3 is also connected to the first heat exchanger 2, the third heat exchanger 4, and the LED light 8 respectively; the fourth water pump 6 is connected to the chiller unit 5 and the air wall heat exchanger 7 respectively, and the third heat exchanger 4 is connected to the air wall heat exchanger 7; the third heat exchanger 4 is connected in parallel to the chiller unit 5 through the first valve F1, the second valve F2, the seventh valve F7, and the eighth valve F8 respectively; the third heat exchanger 4 is also connected in parallel to the chiller unit 5 through the third valve F3, the fourth valve F4, the fifth valve F5, and the sixth valve F6 respectively; the first heat exchanger 2 is also connected to the first water pump 1.

[0049] Optionally, the third heat exchanger 4 is also connected to the first heat exchanger 2 via the first valve F1 and the second valve F2, and the third heat exchanger 4 is also connected to the fourth water pump 6 via the seventh valve F7 and the eighth valve F8.

[0050] In an optional embodiment, as shown in FIG2, the seawater replenishment device 15 is used to flow the incoming seawater raw water into the seawater distillation device 13 through a pipeline.

[0051] Specifically, the seawater replenishment device 15 is an intelligent device that integrates a variety of advanced technologies. It can draw seawater from the vast ocean and replenish the water resource supply subsystem with the drawn seawater to become the raw water for seawater desalination.

[0052] Optionally, the raw water from the desalinated seawater is supplied to the seawater distillation unit 13 via pipeline.

[0053] In an optional embodiment, as shown in FIG2, the seawater distillation device 13 is used to distill seawater to obtain fresh water, and a portion of the fresh water flows into the planting unit 9 through a pipeline, while the other portion flows into the fresh water pool 17 through a pipeline.

[0054] Specifically, seawater distillation apparatus 13 refers to equipment used for distilling raw seawater to obtain fresh water. Its working principle is generally based on the difference in boiling points between seawater and fresh water. Seawater is heated to vaporize, and then the vapor is cooled and condensed to obtain fresh water.

[0055] Optionally, the seawater distillation device 13 supplies a portion of the distilled freshwater to the planting unit 9 through a pipeline, enabling the planting unit 9 to use the freshwater for efficient and sustainable planting production activities, thus ensuring the rational use of freshwater resources.

[0056] Optionally, after the planting unit 9 uses the incoming fresh water for production, the wastewater generated from the planting production activities can be piped into the seawater replenishment device 15 and continue to be used as the raw water for seawater desalination, thus realizing the recycling of water resources.

[0057] Optionally, the seawater distillation apparatus 13 supplies another portion of the distilled freshwater to the freshwater tank 17 via a pipeline.

[0058] Optionally, the seawater distillation unit 13 will also generate corresponding concentrated wastewater.

[0059] Concentrated wastewater is the liquid remaining after seawater is distilled, containing high concentrations of salt and other impurities. If this concentrated wastewater is discharged directly into the environment without treatment, it will undoubtedly cause serious damage to the marine ecosystem.

[0060] Therefore, in this embodiment, the concentrated wastewater generated by the seawater distillation device 13 flows into the concentrated wastewater treatment device 16 through a pipeline.

[0061] Optionally, the concentrated wastewater can be treated by the concentrated wastewater treatment device 16, which can ensure proper disposal of the wastewater, significantly reduce potential environmental pollution, and ensure the green and sustainable operation of the entire seawater distillation process. The treatment methods can include physical, chemical, and biological methods.

[0062] Optionally, as shown in Figure 1, the seawater distillation device 13 can also supply the generated freshwater to the corresponding freshwater user 14.

[0063] In an alternative implementation, as shown in FIG2, a freshwater tank 17 is used to allow the inflow portion to flow into the hot and cold supply subsystem via a first water replenishment and dosing device 18 and a second water replenishment and dosing device 19.

[0064] Specifically, the freshwater tank 17 can replenish freshwater and add chemicals to the hot and cold supply subsystem as needed through the first water replenishment and chemical dosing device 18 and the second water replenishment and chemical dosing device 19, so that the water pressure of the hot and cold supply subsystem can always be kept within a stable and ideal range, thereby ensuring the smooth operation and high efficiency of the entire system.

[0065] The first water replenishment and dosing device 18 can replenish the fresh water stored in the fresh water tank 17 to the first heat exchanger 2, and the second water replenishment and dosing device 19 can replenish the fresh water stored in the fresh water tank 17 to the chiller unit 5.

[0066] In an alternative embodiment, a heating and cooling supply subsystem is provided for cooling the LED lamp 8 and utilizing the waste heat from the cooled LED lamp 8 to provide a heat source for the seawater distillation apparatus 13.

[0067] Specifically, the waste heat from cooling the LED lights in the plant cultivation subsystem using seawater as a cold source can be directly used to heat the low-temperature multi-effect technology for seawater desalination, effectively improving the energy utilization efficiency of both.

[0068] As shown in Figure 3, firstly, seawater enters the first heat exchanger 2 through the first water pump 1, and the incoming secondary water is subjected to heat exchange treatment in the first heat exchanger 2.

[0069] Secondary water typically refers to water resources that have been used once and then recycled, purified, or otherwise reused for other purposes.

[0070] Optionally, a portion of the cooled secondary water after heat exchange treatment flows into the second heat exchanger 10 via the third water pump 3 and the LED light 8.

[0071] Specifically, the cooled secondary water flows in the pipeline through the third water pump 3.

[0072] Alternatively, LED lights 8 generate a lot of heat during operation. If this heat cannot be dissipated effectively and in a timely manner, it will lead to a decrease in the performance of the LED lights or even damage. Although traditional air-cooling is simple, its heat dissipation effect is not ideal in high-temperature and high-humidity environments.

[0073] Therefore, in this embodiment, a portion of the cooled secondary water is supplied to the LED lamp 8 for cooling, which can provide a more stable and efficient heat dissipation effect.

[0074] Optionally, the secondary water, after being cooled by the LED light 8, is heated and flows into the second heat exchanger 10.

[0075] Optionally, the incoming secondary water and the heat source water from seawater desalination are exchanged in the second heat exchanger 10.

[0076] The heat source water for seawater desalination is pre-stored in the seawater distillation device 13 and supplied to the second heat exchanger 10 through pipelines.

[0077] Optionally, the heat source water from seawater desalination is circulated in the pipeline via a second water pump 12, which can ensure a stable flow of the heat source water in the system.

[0078] First, the second heat exchanger 10 draws the heat-exchanged seawater into the solar storage tank 11. This solar storage tank 11 integrates a solar collector, which converts solar energy into heat energy under sunlight, gradually increasing the temperature of the water in the tank. Therefore, in this embodiment, the incoming seawater can be heated using the solar storage tank 11.

[0079] Optionally, the heated seawater is pumped into the seawater distillation device 13 via the second water pump 12 to serve as the heat source required by the seawater distillation device 13 during seawater distillation, thereby improving energy utilization efficiency.

[0080] Optionally, the second heat exchanger 10 can also exchange heat between the incoming seawater heat source water and part of the secondary water, and then the heat-exchanged secondary water flows into the first heat exchanger 2.

[0081] Specifically, in the second heat exchanger 10, the incoming seawater heat source water and part of the secondary water exchange heat. During this process, the heat is precisely transferred to the seawater desalination heat source water, thus achieving full recovery of waste heat.

[0082] Optionally, the secondary water after the waste heat has been recovered is collected together with another portion of secondary water and exchanged with seawater through the first heat exchanger 2, thus circulating the process.

[0083] Optionally, after the incoming secondary water is heat-treated in the first heat exchanger 2, another portion of the cooled secondary water can be heat-treated with the tertiary water circulation through the third heat exchanger 4 and the chiller unit 5.

[0084] Specifically, the heat exchange process between secondary and tertiary water is shown in Figures 4 to 6. This heat exchange process is divided into three operating conditions, which are switched by eight valves F1-F8:

[0085] (1) Operating Condition 1: As shown in Figure 4, this condition is applicable when the seawater temperature is more than two degrees Celsius lower than the required temperature inside the plant factory, i.e., the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is greater than a preset threshold. Under this condition, the second valve F2, the third valve F3, the fifth valve F5 and the eighth valve F8 are open, and the other valves are closed.

[0086] Optionally, under this operating condition, the secondary water exchanges heat with the tertiary water only through the third heat exchanger 4.

[0087] Specifically, another portion of the cooled secondary water in the first heat exchanger 2 is circulated and heat exchanged with the tertiary water through the third water pump 3, the third heat exchanger 4, and the fourth water pump 6.

[0088] (2) Operating Condition Two: As shown in Figure 5, this condition applies when the seawater temperature is higher than the required temperature for the internal environment of the plant factory, i.e., the seawater temperature is higher than the ambient temperature of the planting unit. Under this condition, valves F1, F4, and F6 are open, while the other valves are closed.

[0089] Optionally, under this operating condition, the secondary and tertiary water are cooled and heated only by the chiller unit 5.

[0090] Specifically, another portion of the cooled secondary water in the first heat exchanger 2 is circulated and exchanged with the tertiary water through the third water pump 3, the chiller unit 5, and the fourth water pump 6.

[0091] (3) Operating Condition 3: As shown in Figure 6, this condition is applicable when the seawater temperature is lower than the required temperature for the internal environment of the plant factory, but the difference is less than two degrees Celsius. That is, the seawater temperature is lower than the ambient temperature of the planting unit and the difference between the ambient temperature of the planting unit and the seawater temperature is less than the preset threshold. Under this condition, all valves are open.

[0092] Optionally, under this operating condition, the secondary water first exchanges heat with the tertiary water through the third heat exchanger 4, and then the secondary water and tertiary water exchange heat through the chiller unit 5.

[0093] Specifically, another portion of the cooled secondary water in the first heat exchanger 2 is first exchanged with the tertiary water through the third water pump 3, the third heat exchanger 4 and the fourth water pump 6, and then cooled and exchanged through the chiller unit 5.

[0094] Finally, the water after heat exchange under the above different operating conditions is fed into the air wall heat exchanger 7, and the internal air of the planting unit 9 is regulated.

[0095] The combined hot and cold water supply system for seawater desalination and plant factories provided in this embodiment addresses the issue of water resource dependence by providing a stable source of fresh water for the planting unit and the water circulation system through the seawater replenishment and distillation devices within the water supply subsystem. Additionally, wastewater generated during the planting process can flow into the seawater replenishment device to continue as raw water for desalination, achieving water resource recycling. In terms of energy, the seawater replenishment and distillation devices within the water supply subsystem can channel a portion of the generated freshwater into the hot and cold water supply subsystem via a first and second water replenishment and dosing device. Simultaneously, the hot and cold water supply subsystem can cool the LED lights within the plant planting subsystem, utilizing the waste heat from the cooled LED lights to provide a heat source for the seawater distillation device, effectively improving the energy efficiency of both systems. Therefore, by implementing this application, the organic integration of seawater desalination and plant factories in terms of energy and water supply is achieved, enhancing the energy and resource utilization efficiency of both applications.

[0096] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A cold and hot water combined supply system that integrates seawater desalination and a plant factory, characterized by, The system comprises a water resource supply subsystem, a cold and heat supply subsystem and a plant growing subsystem, the water resource supply subsystem comprises a seawater distillation device, a seawater supplement device, a freshwater pool, a first water supplement and medicine adding device and a second water supplement and medicine adding device, the plant growing subsystem comprises a growing unit and an LED lamp; The seawater supplement device is used for flowing the inflowing seawater raw water into the seawater distillation device through a pipeline; The seawater distillation device is used for distilling the seawater raw water to obtain freshwater, and flowing part of the freshwater into the growing unit through a pipeline and flowing another part of the freshwater into the freshwater pool; The freshwater pool is used for flowing the inflowing part into the cold and heat supply subsystem through the first water supplement and medicine adding device and the second water supplement and medicine adding device; The growing unit is used for producing by using the inflowing freshwater and flowing the generated wastewater into the seawater supplement device; The cold and heat supply subsystem is used for cooling the LED lamp and providing a heat source for the seawater distillation device by using the residual heat of the cooled LED lamp.

2. The system of claim 1, wherein, The water resource supply subsystem further comprises a concentrated wastewater treatment device; The seawater distillation device is further used for distilling the seawater raw water to obtain concentrated wastewater, and flowing the concentrated wastewater into the concentrated wastewater treatment device for treatment through a pipeline.

3. The system of claim 1, wherein, The cold and heat supply subsystem comprises a first water pump and a first heat exchanger; The first water pump is used for flowing the inflowing seawater raw water into the first heat exchanger through a pipeline; The first heat exchanger is used for heating the inflowing seawater according to the inflowing secondary water.

4. The system of claim 3, wherein, The cold and heat supply subsystem further comprises a second heat exchanger, a solar heat storage tank, a second water pump and a third water pump; The first heat exchanger is further used for cooling the inflowing secondary water according to the inflowing seawater raw water, and flowing part of the cooled secondary water into the second heat exchanger through the third water pump and the LED lamp; The second heat exchanger is used for exchanging heat between the inflowing seawater heat source water and part of the secondary water, and flowing the exchanged seawater heat source water into the solar heat storage tank, the seawater heat source water is stored in the seawater distillation device in advance and flows into the second heat exchanger through a pipeline; The solar heat storage tank is used for heating the inflowing seawater heat source water, and flowing the heated seawater heat source water into the seawater distillation device through the second water pump.

5. The system according to claim 4, wherein The second heat exchanger is further used for exchanging heat between the inflowing seawater heat source water and part of the secondary water, and flowing the exchanged secondary water into the first heat exchanger.

6. The system of claim 5, wherein, The cold and heat supply subsystem further comprises a third heat exchanger, a water chiller, a fourth water pump, an air wall heat exchanger, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve and an eighth valve; The fourth water pump is connected with the water chiller and the air wall heat exchanger respectively, and the third heat exchanger is connected with the air wall heat exchanger. The third heat exchanger is connected in parallel with the water chiller through the first valve, the second valve, the seventh valve and the eighth valve respectively; The third heat exchanger is also connected in parallel with the water chiller through the third valve, the fourth valve, the fifth valve and the sixth valve respectively; The third heat exchanger is connected with the first heat exchanger through the first valve and the second valve, and is connected with the fourth water pump through the seventh valve and the eighth valve.

7. The system of claim 6, wherein, when the seawater temperature is less than the environment temperature of the planting unit and the difference between the environment temperature of the planting unit and the seawater temperature is greater than a preset threshold, the second valve, the third valve, the fifth valve and the eighth valve are opened, and the first valve, the fourth valve, the sixth valve and the seventh valve are closed; when the seawater temperature is greater than the environment temperature of the planting unit, the first valve, the fourth valve and the sixth valve are opened, and the second valve, the third valve, the fifth valve, the seventh valve and the eighth valve are closed; when the seawater temperature is less than the environment temperature of the planting unit and the difference between the environment temperature of the planting unit and the seawater temperature is less than the preset threshold, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are opened.

8. The system of claim 7, wherein, the first heat exchanger is further configured to, when the seawater temperature is less than the environment temperature of the planting unit and the difference between the environment temperature of the planting unit and the seawater temperature is greater than a preset threshold, circulate the other part of the secondary water after being cooled to circulate and exchange heat with the tertiary water through the third water pump, the third heat exchanger and the fourth water pump, and flow the heat-exchanged tertiary water into the air wall heat exchanger; the air wall heat exchanger is configured to use the flowed heat-exchanged tertiary water to adjust the internal air of the planting unit.

9. The system of claim 8, wherein, the first heat exchanger is further configured to, when the seawater temperature is greater than the environment temperature of the planting unit, circulate the other part of the secondary water after being cooled to circulate and exchange heat with the tertiary water through the third water pump, the water chiller and the fourth water pump, and flow the heat-exchanged tertiary water into the air wall heat exchanger.

10. The system of claim 8, wherein, the first heat exchanger is further configured to, when the seawater temperature is less than the environment temperature of the planting unit and the difference between the environment temperature of the planting unit and the seawater temperature is less than the preset threshold, circulate the other part of the secondary water after being cooled to first circulate and exchange heat with the tertiary water through the third water pump, the third heat exchanger and the fourth water pump, then circulate and exchange heat with the tertiary water through the water chiller, and flow the heat-exchanged tertiary water into the air wall heat exchanger.

Images