Air conditioning energy-saving system and cooling water circulation method and power supply method thereof

Abstract

The present invention discloses an air conditioning energy-saving system and its cooling water circulation method and power supply method, and relates to the technical field of air conditioning operation systems. The air conditioning energy-saving system includes a central air conditioning device, a photovoltaic power generation device, a salt difference power generation device and an energy storage device. The power output end of the photovoltaic power generation device and the electrode of the salt difference power generation device are electrically connected to the energy storage device respectively, and the power output end of the photovoltaic power generation device and the energy storage device are electrically connected to the power circuit of the central air conditioning device respectively; the drain outlet of the cooling water circuit of the central air conditioning device is connected to the dilute liquid chamber of the salt difference power generation device, and the water replenishment port of the cooling water circuit of the central air conditioning device is connected to the condensation outlet of the salt difference power generation device. The air conditioning energy-saving system uses the photovoltaic power generation device and the salt difference power generation device to synergistically supply power to the central air conditioning device, solves the problem of unstable power supply of a single power generation device, realizes all-weather, high-efficiency energy conservation and emission reduction, and also realizes the recycling of cooling water.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning operation systems, and in particular to an air-conditioning energy-saving system and a cooling water circulation method and a power supply method thereof. Background Art

[0002] With the continuous growth of global energy demand and the increasing awareness of environmental protection, energy conservation and emission reduction of building energy consumption has become the focus of attention of all sectors of society. Among the many building energy consumption, air-conditioning systems, especially central air-conditioning units, have become an important area of ​​energy conservation and emission reduction due to their continuous operation and high energy consumption. Traditional air-conditioning systems rely on power grids, which not only exacerbates the peak of electricity demand, but also indirectly leads to an increase in carbon emissions, posing a severe challenge to the environment.

[0003] To address this problem, in recent years, introducing renewable energy, especially solar energy, into central air-conditioning devices to replace or partially replace traditional electricity supply has become a promising solution. At present, the application of solar energy in central air-conditioning devices is mainly concentrated on photovoltaic technology, that is, solar energy is directly converted into electrical energy through the photoelectric conversion process and supplied to central air-conditioning devices. Although this method reduces the dependence on fossil energy to a certain extent, due to the inherent limitations of photovoltaic technology, such as the significant influence of factors such as light intensity and temperature changes on the photoelectric conversion efficiency, as well as the energy loss in the photoelectric conversion process, the overall energy conversion efficiency of the solar air-conditioning system is low, and the potential advantages of solar energy are not fully utilized.

[0004] In addition, relying solely on photovoltaic power generation also has the problem of unstable power supply. When there is insufficient sunlight or at night, photovoltaic power generation drops sharply or even reaches zero, and it needs to rely on the power grid or other backup energy sources to supplement, failing to truly achieve the goal of all-weather, high-efficiency energy conservation and emission reduction. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an air conditioning energy-saving system and a cooling water circulation method and a power supply method thereof.

[0006] The present invention discloses an air conditioning energy-saving system, comprising:

[0007] A central air conditioning device, comprising a power supply circuit and a cooling water circuit, wherein the cooling water circuit comprises a condenser and a cooling tower, wherein a water outlet of the condenser is connected to a water inlet of the cooling tower, and a water outlet of the cooling tower is connected to a water inlet of the condenser, wherein the water outlet of the condenser constitutes a drain outlet of the cooling water circuit, and the water inlet of the cooling tower constitutes a water supply inlet of the cooling water circuit;

[0008] A photovoltaic power generation device, which includes a light energy receiving end and an electric energy output end, wherein the solar energy received by the light energy receiving end is converted into electric energy and then outputted by the electric energy output end;

[0009] A salt difference power generation device, comprising a concentrated liquid chamber, a dilute liquid chamber, a condensation chamber and electrodes, wherein the concentrated liquid chamber and the dilute liquid chamber are separated from each other, and an ion selective channel is provided between the concentrated liquid chamber and the dilute liquid chamber, wherein a high salt solution is contained in the concentrated liquid chamber, and a low salt solution is contained in the dilute liquid chamber, and the ion selective channel allows ions in the concentrated liquid chamber to selectively pass through, wherein electrodes are respectively provided in the concentrated liquid chamber and the dilute liquid chamber, and the electrodes are respectively in contact with the high salt solution and the low salt solution; the condensation chamber is provided above the dilute liquid chamber and is interconnected with the dilute liquid chamber, and the water content of the low salt solution in the dilute liquid chamber absorbs solar heat energy and evaporates, and then condenses in the condensation chamber to form condensed pure water, and the condensed pure water is discharged through a condensation outlet of the condensation chamber; and

[0010] Energy storage devices;

[0011] Among them, the power output end and the electrode are electrically connected to the energy storage device respectively, and the power output end and the energy storage device are electrically connected to the power supply circuit respectively; the drain outlet of the cooling water circuit is connected to the dilute liquid chamber, and the water replenishment port of the cooling water circuit is connected to the condensation water outlet.

[0012] According to one embodiment of the present invention, the condensation chamber comprises a condensation plate, the inner side of the condensation plate is provided with a collecting groove, the opening of the collecting groove faces upward, and the collecting groove is connected to the condensation water outlet; or

[0013] The condensation chamber includes at least two condensation plates, each of which is provided with a collecting groove on its inner side, the open opening of the collecting groove faces upward, two adjacent condensation plates are connected, the collecting grooves on two adjacent condensation plates are connected, and the collecting groove on at least one condensation plate is connected to the condensation water outlet.

[0014] According to one embodiment of the present invention, a single condensation plate includes a condensation portion and a collecting portion. The condensation portion is arranged above the collecting portion and connected to the collecting portion. The condensation portion is inclined toward the dilute liquid chamber. The collecting groove is arranged on the inner side surface of the collecting portion, and the opening of the collecting groove faces the condensation portion.

[0015] According to one embodiment of the present invention, the condensation part is made of a material with a light transmittance greater than 95%.

[0016] According to one embodiment of the present invention, when the condensation chamber includes a condensation plate, the collecting groove is inclined relative to the horizontal plane, and the lower end of the collecting groove is connected to the condensation water outlet; or

[0017] When the condensation chamber includes at least two condensation plates, at least two collecting grooves are inclined relative to the horizontal plane and have the same inclination direction, and the lowermost ends of the at least two collecting grooves are connected to the condensation water outlet.

[0018] According to one embodiment of the present invention, the inclination angle of the collecting groove is θ It is 3~5°.

[0019] According to one embodiment of the present invention, the salt difference power generation device also includes a photothermal conversion component, which includes a light absorber and a heat conductor. The light absorber is arranged in the condensation chamber and / or the dilute liquid chamber, the heat conductor is arranged in the dilute liquid chamber and in contact with the low-salt solution, the light absorber and the heat conductor are thermally connected, the light absorber is used to absorb solar thermal energy, and the heat conductor is used to transfer heat energy to the low-salt solution in the dilute liquid chamber.

[0020] According to one embodiment of the present invention, the salt difference power generation device also includes a heat storage component, which is arranged on the outer side of the dilute liquid chamber. The heat storage component is equipped with a phase change material, which is used to absorb solar thermal energy and store heat through phase change or release phase change latent heat and transfer it to the low-salt solution in the dilute liquid chamber.

[0021] According to one embodiment of the present invention, a passage between the condensation water outlet and the water replenishment port is provided with a water storage container and a water replenishment valve, and the water replenishment valve is located downstream of the water storage container; a second temperature sensor is provided in the passage between the condensation water outlet and the water replenishment port, and the second temperature sensor is located upstream of the water storage container, and the second temperature sensor is used to monitor the temperature of condensed pure water discharged from the condensation water outlet.

[0022] According to one embodiment of the present invention, an insulation container and a drain valve are provided on the passage between the drain outlet and the dilute liquid chamber, and the drain valve is located upstream of the insulation container; a first temperature sensor is provided on the passage between the drain outlet and the dilute liquid chamber, and the first temperature sensor is located upstream of the drain valve, and the first temperature sensor is used to monitor the temperature of cooling water discharged from the drain outlet.

[0023] According to one embodiment of the present invention, the cooling water circuit also includes a water supply pump, a cooling water pump and a flow controller, the water outlet of the condenser is connected to the water inlet of the flow controller, the water outlet of the flow controller is connected to the water inlet of the water supply pump, the water outlet of the water supply pump is connected to the water inlet of the cooling tower, the water outlet of the cooling tower is connected to the water inlet of the cooling water pump, and the water outlet of the cooling water pump is connected to the water inlet of the condenser; the water outlet of the condenser constitutes the drain outlet of the cooling water circuit, and the water inlet of the flow controller constitutes the water replenishment port of the cooling water circuit.

[0024] The present invention also discloses a cooling water circulation method for the air conditioning energy-saving system as described above, comprising the following steps:

[0025] S11. The cooling water in the cooling water circuit enters the cooling tower for cooling, and then enters the condenser for heat exchange with the refrigerant. After the heat exchange, part of the high-temperature cooling water enters the cooling tower again;

[0026] S12. When the power generated by the salt difference power generation device is insufficient, another part of the high-temperature cooling water after heat exchange in the cooling water circuit is discharged into the dilute liquid chamber through the drain port;

[0027] S13. The water in the low-salt solution in the dilute liquid chamber absorbs solar heat energy and evaporates, then condenses in the condensation chamber to form condensed pure water, which is discharged through the condensation outlet. When the cooling water in the cooling water circuit is insufficient, the condensed pure water is discharged into the cooling water circuit through the water replenishment port.

[0028] The present invention also discloses a power supply method for the air conditioning energy-saving system as described above, comprising the following steps:

[0029] S21. The salt difference power generation device continues to operate, and the generated electrical energy is stored in the energy storage device;

[0030] S22. When there is sufficient sunlight in the environment, the central air conditioning device is powered by the photovoltaic power generation device, and the excess electricity generated by the photovoltaic power generation device is stored in the energy storage device;

[0031] S23. When the sunlight in the environment is insufficient, the central air conditioning device is powered by the photovoltaic power generation device and the energy storage device;

[0032] S24. When the sunlight in the environment disappears, the central air conditioning unit is powered by the energy storage device.

[0033] Compared with the prior art, the air conditioning energy-saving system and its cooling water circulation method and power supply method of the present invention have the following advantages:

[0034] The air conditioning energy-saving system of the present invention is provided with a photovoltaic power generation device and a salt difference power generation device, and utilizes two groups of new energy power generation devices to collaboratively supply power to a central air conditioning device, thereby solving the problem of unstable power supply of a single new energy power generation device and achieving all-weather, high-efficiency energy conservation and emission reduction.

[0035] In addition, the air conditioning energy-saving system of the present invention is connected with the salt difference power generation device through the cooling water circuit of the central air-conditioning device. The cooling water of the cooling water circuit can be discharged into the dilute liquid chamber to dilute the low-salt solution. At the same time, the condensed pure water formed by the water of the low-salt solution in the dilute liquid chamber absorbing solar heat energy and evaporating can be discharged into the cooling water circuit to replenish the cooling water. This not only realizes the recycling of cooling water, but also reduces salt impurities in the cooling water circuit, thereby extending the service life of the central air-conditioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 It is a structural schematic diagram of the air conditioning energy-saving system in Example 1;

[0038] Figure 2It is a structural schematic diagram of the condensation chamber in Example 1;

[0039] Figure 3 This is a diagram of the internal structure of the condensation chamber in Example 1.

[0040] Description of reference numerals:

[0041] 100, central air conditioning device; 110, cooling water circuit; 111, condenser; 112, cooling tower; 113, water supply pump; 114, cooling water pump; 115, flow controller; 200, photovoltaic power generation device; 300, salt difference power generation device; 310, concentrated solution chamber; 320, diluted solution chamber; 330, condensation chamber; 331, condensation water outlet; 332, condensation plate; 3321, condensation part; 3322, collecting part; 333, collecting trough; 340, ion selective membrane; 350, photothermal conversion component; 351, light absorber; 352, heat conductor; 360, heat storage component; 400, energy storage device; 500, thermal insulation container; 510, drain valve; 520, first temperature sensor; 600, water storage container; 610, water replenishment valve; 620, second temperature sensor. DETAILED DESCRIPTION

[0042] The following will disclose multiple embodiments of the present invention with diagrams. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0043] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] Embodiment 1

[0045] This embodiment provides an air conditioning energy-saving system, which utilizes two sets of new energy power generation devices to supply power to the central air conditioning device 100, thereby solving the problem of unstable power supply of a single new energy power generation device and achieving all-weather, high-efficiency energy conservation and emission reduction.

[0046] See also Figure 1The air conditioning energy-saving system includes a central air conditioning device 100, a photovoltaic power generation device 200, a salt difference power generation device 300 and an energy storage device 400. The photovoltaic power generation device 200 and the salt difference power generation device 300 are electrically connected to the energy storage device 400, respectively, and the photovoltaic power generation device 200 and the energy storage device 400 are electrically connected to the central air conditioning device 100. The electric energy generated by the salt difference power generation device 300 is stored in the energy storage device 400; when there is sufficient sunlight in the environment, the photovoltaic power generation device 200 supplies power to the central air conditioning device 100, and the excess electric energy generated by the photovoltaic power generation device 200 is stored in the energy storage device 400; when the sunlight in the environment is insufficient, the photovoltaic power generation device 200 and the energy storage device 400 cooperate to supply power to the central air conditioning device 100; when the sunlight in the environment disappears, the energy storage device 400 supplies power to the central air conditioning device 100.

[0047] The air conditioning energy-saving system is equipped with a photovoltaic power generation device 200 and a salt difference power generation device 300, and utilizes two sets of new energy power generation devices to collaboratively supply power to a central air conditioning device, thereby solving the problem of unstable power supply of a single new energy power generation device and achieving all-weather, high-efficiency energy conservation and emission reduction.

[0048] Review Figure 1 The central air conditioning device 100 includes a power circuit and a cooling water loop 110. The power circuit is used to access a power source to supply power to the central air conditioning device 100, and the cooling water loop 110 is used to take away heat from the central air conditioning device 100 to achieve the purpose of regulating the building temperature.

[0049] In this embodiment, the cooling water circuit 110 includes a condenser 111 and a cooling tower 112. The water outlet of the condenser 111 is connected to the water inlet of the cooling tower 112, and the water outlet of the cooling tower 112 is connected to the water inlet of the condenser 111. After the cooling water enters the cooling tower 112 for cooling, it enters the condenser 111 for heat exchange with the refrigerant. The high-temperature cooling water after the heat exchange enters the cooling tower 112 again, and the cycle is repeated. Furthermore, the cooling water circuit 110 is also provided with a drain port and a water replenishment port. The cooling water in the cooling water circuit 110 can be discharged through the drain port, and the cooling water can be replenished to the cooling water circuit 110 through the water replenishment port.

[0050] Review Figure 1 The photovoltaic power generation device 200 includes a light energy receiving end and an electric energy output end. The light energy receiving end receives solar energy, and after the solar energy is converted into electric energy, the electric energy is output through the electric energy output end. The electric energy output end is electrically connected to the power supply circuit, and the electric energy output end is also electrically connected to the energy storage device 400. The electric energy generated by the photovoltaic power generation device 200 can be used to supply power to the central air conditioning device 100, or can be stored in the energy storage device 400.

[0051] Review Figure 1The salt difference power generation device 300 includes a concentrated solution chamber 310, a diluted solution chamber 320, a condensation chamber 330 and electrodes. The concentrated solution chamber 310 and the diluted solution chamber 320 are arranged adjacent to each other. The condensation chamber 330 is arranged above the diluted solution chamber 320 and communicates with the diluted solution chamber 320. Electrodes are arranged in the concentrated solution chamber 310 and the diluted solution chamber 320, and the electrodes are in contact with the high-salt solution and the low-salt solution respectively. Among them, the diluted solution chamber 320 is connected to the drain port of the cooling water circuit 110, the condensation chamber 330 is connected to the water replenishment port of the cooling water circuit 110, and the electrodes are electrically connected to the energy storage device 400.

[0052] In this embodiment, the condensation chamber 330 needs to be arranged above the dilute liquid chamber 320 and communicate with the dilute liquid chamber 320 to ensure that the condensation chamber 330 can collect the water evaporated from the low-salt solution in the dilute liquid chamber 320. The arrangement of the dilute liquid chamber 320 and the concentrated liquid chamber 310 is not limited, and can be arranged adjacent to each other on the left and right or adjacent to each other on the top and bottom. Preferably, the condensation chamber 330, the dilute liquid chamber 320, and the concentrated liquid chamber 310 are arranged in order of the upper, middle, and lower positions, which not only meets the position arrangement requirements, but also saves floor space.

[0053] In this embodiment, the concentrated solution chamber 310 and the diluted solution chamber 320 are separated from each other by an ion selective membrane 340, and an ion selective channel is provided on the ion selective membrane 340, and the ion selective channel is used to selectively pass the ions in the concentrated solution chamber 310. The ion selective membrane 340 is a cation selective membrane or an anion selective membrane, and the cation selective channel is provided on the cation selective membrane, and the cation selective channel is used to pass the cations in the concentrated solution chamber 310, and the anion selective membrane is provided with an anion selective channel, and the anion selective channel is used to pass the anions in the concentrated solution chamber 310.

[0054] In specific applications, the concentrated solution chamber 310 is filled with a high-salt solution, and the dilute solution chamber 320 is filled with a low-salt solution. The salinity difference between the high-salt solution and the low-salt solution is used to drive the ions in the concentrated solution chamber 310 to migrate to the dilute solution chamber 320 through the ion selective channel on the ion selective membrane 340, thereby converting the electrochemical potential energy into electrical energy and storing it in the energy storage device 400.

[0055] In this embodiment, see Figure 2 The condensation chamber 330 has a condensation outlet 331 . The dilute liquid chamber 320 is connected to the drain port of the cooling water circuit 110 , and the condensation outlet 331 is connected to the water replenishment port of the cooling water circuit 110 .

[0056] In specific applications, a portion of the cooling water in the cooling water loop 110 can be discharged into the dilute liquid chamber 320 through the drain port to dilute the low-salt solution in the dilute liquid chamber 320, so as to maintain a salinity difference between the high-salt solution and the low-salt solution, thereby maintaining the continuous power generation of the salt difference power generation device 300, and the water in the low-salt solution in the dilute liquid chamber 320 absorbs solar heat energy and evaporates, and then condenses in the condensation chamber 330 to form condensed pure water, which is discharged through the condensation outlet 331 and can be discharged into the cooling water loop 110 through the water replenishment port. At the same time, the cooling water in the cooling water loop 110 is continuously updated, so that the salt impurities in the cooling water loop 110 are reduced, thereby extending the service life of the central air conditioning device 100.

[0057] The air conditioning energy-saving system connects the cooling water circuit 110 of the central air conditioning device 100 with the salt difference power generation device 300. The cooling water of the cooling water circuit 110 can be discharged into the dilute liquid chamber 320 to dilute the low-salt solution. At the same time, the condensed pure water formed by the water of the low-salt solution in the dilute liquid chamber 320 absorbing solar heat energy and evaporating can be discharged into the cooling water circuit 110 to replenish the cooling water. This not only realizes the recycling of cooling water, but also reduces salt impurities in the cooling water circuit 110, thereby extending the service life of the central air conditioning device 100.

[0058] Furthermore, in this embodiment, the water outlet of the condenser 111 is used as the drain outlet of the cooling water circuit 110, so the drain outlet discharges the cooling water after heat exchange with the refrigerant, and the cooling water after heat exchange is high temperature. When a part of the high-temperature cooling water after heat exchange is discharged into the dilute liquid chamber 320, in addition to diluting the low-salt solution, the temperature of the low-salt solution is also increased, so that the temperature difference between the high-salt solution and the low-salt solution is increased, and then the ion migration rate and selectivity are increased, thereby improving the power generation performance of the salt difference power generation device 300. Accordingly, the water inlet of the cooling tower 112 is used as the water replenishment port of the cooling water circuit 110.

[0059] In this embodiment, the cooling water circuit 110 further includes a water supply pump 113, a cooling water pump 114 and a flow controller 115. The water outlet of the condenser 111 is connected to the water inlet of the flow controller 115, the water outlet of the flow controller 115 is connected to the water inlet of the water supply pump 113, the water outlet of the water supply pump 113 is connected to the water inlet of the cooling tower 112, the water outlet of the cooling tower 112 is connected to the water inlet of the cooling water pump 114, and the water outlet of the cooling water pump 114 is connected to the water inlet of the condenser 111. Under the control of the cooling water flow by the flow controller 115, the cooling water enters the cooling tower 112 through the water supply pump 113 for cooling, and then enters the condenser 111 through the cooling water pump 114 for heat exchange. The cooling water after heat exchange enters the cooling tower 112 through the water supply pump 113, and the cycle is thus formed. Furthermore, in this embodiment, the water inlet of the flow controller 115 is used as the water replenishment port of the cooling water loop 110 so as to control the replenishment amount of condensed pure water.

[0060] Furthermore, a heat preservation container 500 and a drain valve 510 are provided on the passage between the drain port of the cooling water loop 110 and the dilute liquid chamber 320, and the drain valve 510 is located upstream of the heat preservation container 500. When the drain valve 510 is opened, the drain port is connected to the water inlet of the heat preservation container 500, and the high-temperature cooling water after heat exchange in the cooling water loop 110 is discharged into the heat preservation container 500 for storage. When the dilute liquid chamber 320 needs to dilute the low-salt solution, the cooling water in the heat preservation container 500 is discharged into the dilute liquid chamber 320. Similarly, a water storage container 600 and a water replenishment valve 610 are provided on the passage between the condensation water outlet 331 and the water replenishment port of the cooling water loop 110, and the water replenishment valve 610 is located downstream of the water storage container 600. The condensed pure water discharged from the condensation chamber 330 flows into the water storage container 600 for storage. When the cooling water in the cooling water circuit 110 is insufficient, the water replenishment valve 610 is opened, the water replenishment port is connected to the water outlet of the water storage container 600, and the condensed pure water in the water storage container 600 is discharged into the cooling water circuit 110.

[0061] In addition, a first temperature sensor 520 is provided on the passage between the drain port of the cooling water circuit 110 and the dilute liquid chamber 320, and a second temperature sensor 620 is provided on the passage between the condensation water outlet 331 and the water replenishment port of the cooling water circuit 110. The first temperature sensor 520 is located upstream of the drain valve 510, and is used to monitor the temperature of the cooling water discharged from the drain port, and cooperates with the heat preservation container 500 to keep the cooling water warm, so as to ensure that the temperature of the low-salt solution in the dilute liquid chamber 320 can be increased. The second temperature sensor 620 is located upstream of the water storage container 600, and is used to monitor the temperature of the condensed pure water discharged from the condensation water outlet 331.

[0062] See also Figure 2 and Figure 3 The condensation chamber 330 includes at least one condensation plate 332, and each condensation plate 332 is provided with a collecting groove 333 on the inner side surface, and the opening of the collecting groove 333 faces upward, wherein the collecting groove 333 on at least one condensation plate 332 is connected with the condensation water outlet 331. The water in the low-salt solution in the weak liquid chamber 320 absorbs solar heat energy and evaporates to become water vapor, and forms condensed pure water after contacting the inner side surface of the condensation plate 332. The condensed pure water flows along the inner side surface of the condensation plate 332 to the collecting groove 333, and then flows to the condensation water outlet 331 through the collecting groove 333 for discharge. Preferably, the cross section of the collecting groove 333 is semicircular, which is conducive to collecting condensed pure water and reducing the wall hanging phenomenon.

[0063] Further, a single condensation plate 332 includes a condensation portion 3321 and a collector portion 3322. The condensation portion 3321 is disposed above the collector portion 3322 and connected to the collector portion 3322. The condensation portion 3321 is disposed obliquely facing the dilute liquid chamber 320, and the collector portion 3322 is disposed vertically. The collector trough 333 is disposed on the inner side of the collector portion 3322, and the opening of the collector trough 333 faces the condensation portion 3321. After the water vapor contacts the inner side of the condensation portion 3321, condensed pure water is formed. The condensed pure water flows along the inner side of the inclined condensation portion 3321 to the inner side of the collector portion 3322, and then flows into the collector trough 333 along the inner side of the collector portion 3322, and the collection efficiency of the condensed pure water is relatively high. Among them, the condensation portion 3321 is made of a material with a light transmittance greater than 95%, so as to improve the water evaporation efficiency of the low-salt solution in the dilute liquid chamber 320. Preferably, the condensation portion 3321 is made of hydrophilic glass.

[0064] Furthermore, the condensation chamber 330 is a cone-shaped structure to improve the collection efficiency of condensed pure water. When the condensation chamber 330 includes one condensation plate 332, the condensation chamber 330 may be cone-shaped; and when the condensation chamber 330 includes at least two condensation plates 332, the condensation chamber 330 may be polygonal pyramid-shaped, two adjacent condensation plates 332 are connected, and the collecting grooves 333 on the two adjacent condensation plates 332 are connected, wherein the collecting groove 333 on at least one condensation plate 332 is connected to the condensation water outlet 331.

[0065] In addition, the collecting groove 333 is inclined relative to the horizontal plane, and the inclination angle of the collecting groove 333 is ∠ θ The angle of the condensation chamber 330 is 3-5°, so as to facilitate the condensed pure water to flow to the condensation outlet 331. When the condensation chamber 330 includes one condensation plate 332, the collecting groove 333 on the condensation plate 332 is inclined relative to the horizontal plane, and the lower end of the collecting groove 333 is connected to the condensation outlet 331. When the condensation chamber 330 includes at least two condensation plates 332, at least two collecting grooves 333 are inclined relative to the horizontal plane and the inclination direction is the same, and the lowermost ends of at least two collecting grooves 333 are connected to the condensation outlet 331.

[0066] This embodiment is used as an example for description. Figure 2 and Figure 3The condensation chamber 330 is in the shape of a quadrangular pyramid and is composed of four condensation plates 332. In a single condensation plate 332, the condensation portion 3321 is a flat plate structure arranged obliquely, and the collecting portion 3322 is a flat plate structure arranged vertically. Collecting grooves 333 are arranged on the inner side surfaces of the four condensation plates 332, and the collecting grooves 333 are arranged obliquely relative to the horizontal plane on the collecting portion 3322. Condensation outlets 331 are arranged at the junction of two adjacent condensation plates 332, wherein two collecting grooves 333 are close to the condensation outlets 331, and the other two collecting grooves 333 are far away from the condensation outlets 331. At the same time, two adjacent collecting grooves 333 are connected; among them, the lower end of the collecting groove 333 far away from the condensation outlet 331 is connected to the upper end of the collecting groove 333 close to the condensation outlet 331, the upper ends of the two collecting grooves 333 far from the condensation outlet 331 are connected, and the lower ends of the two collecting grooves 333 close to the condensation outlet 331 are both connected to the condensation outlet 331, thereby forming a "panning mountain type" collecting channel.

[0067] In this embodiment, the salt difference power generation device 300 further includes a photothermal conversion component 350, which absorbs solar heat energy and transfers it to the dilute solution chamber 320 to increase the temperature of the low-salt solution in the dilute solution chamber 320 and promote the evaporation of water in the low-salt solution in the dilute solution chamber 320. Figure 1 The light-to-heat conversion assembly 350 includes a light absorber 351 and a heat conductor 352. The light absorber 351 is disposed in the condensation chamber 330, the diluted liquid chamber 320, or the condensation chamber 330 and the diluted liquid chamber 320. Preferably, the light absorber 351 is disposed in the diluted liquid chamber 320 and is disposed close to the condensation chamber 330, while the heat conductor 352 is disposed in the diluted liquid chamber 320 and is in contact with the low-salt solution in the diluted liquid chamber 320. The light absorber 351 is thermally connected to the heat conductor 352. The light absorber 351 is used to absorb solar thermal energy and is made of photothermal materials with high photothermal conversion efficiency, such as copper / aluminum metal and its oxides, carbon-based materials, and metal nanotubes; the heat conductor 352 is used to transfer heat energy to the low-salt solution in the diluted liquid chamber 320 and is made of insulating heat-conducting materials such as silicon carbide foam. In specific applications, after the solar heat energy is absorbed by the light absorber 351 through the condensation plate 332 , the heat energy is transferred to the low-salt solution in the dilute solution chamber 320 through the heat conductive member 352 .

[0068] In this embodiment, the salt difference power generation device 300 further includes a heat storage component 360, which stores solar thermal energy and releases latent heat so that the temperature difference between the low-salinity solution and the high-salinity solution can be maintained in the absence of sunlight, thereby overcoming the intermittent problem of sunlight, enhancing the water evaporation efficiency of the low-salinity solution and improving the osmotic power generation performance. Figure 1The heat storage component 360 is arranged on the outer surface of the dilute chamber 320, and is composed of an insulating shell and a phase change material, wherein the phase change material is used to absorb solar thermal energy and store heat through phase change or release latent heat of phase change and transfer it to the low-salt solution in the dilute chamber 320. When sunlight exists, the phase change material melts to store solar thermal energy. When the sunlight disappears, the phase change material releases latent heat through phase change and transfers it to the low-salt solution in the dilute chamber 320. Preferably, the composite phase change material is prepared using paraffin with a melting point of 57°C and metal copper foam. After the sunlight disappears, the composite phase change material can release latent heat for up to 16 hours.

[0069] Embodiment 2

[0070] This embodiment provides a cooling water circulation method for an air conditioning energy-saving system, which is applicable to the air conditioning energy-saving system described in Embodiment 1. The cooling water circulation method for the air conditioning energy-saving system comprises the following steps:

[0071] S11. The cooling water in the cooling water circuit 110 enters the cooling tower 112 for cooling, and then enters the condenser 111 for heat exchange with the refrigerant, and a portion of the high-temperature cooling water after the heat exchange enters the cooling tower 112;

[0072] S12. When the salt difference power generation device generates insufficient electricity, another portion of the high-temperature cooling water after heat exchange in the cooling water circuit 110 is discharged into the dilute liquid chamber 320 through the drain port;

[0073] S13. The water in the low-salt solution in the dilute liquid chamber 320 absorbs solar heat energy and evaporates, and then condenses in the condensation chamber 330 to form condensed pure water, which is discharged through the condensation outlet 331. When the cooling water in the cooling water circuit 110 is insufficient, the condensed pure water is discharged into the cooling water circuit 110 through the water replenishment port.

[0074] In this embodiment, when the cooling water circuit 110 also includes a water supply pump 113, a cooling water pump 114 and a flow controller 115, step S11 is specifically as follows: under the control of the cooling water flow by the flow controller 115, the cooling water in the cooling water circuit 110 enters the cooling tower 112 through the water supply pump 113 to be cooled, and then enters the condenser 111 through the cooling water pump 114 to exchange heat with the refrigerant, and a portion of the high-temperature cooling water after the heat exchange enters the cooling tower 112 again through the water supply pump 113.

[0075] In step S12 of the present embodiment, the triggering condition for insufficient electric energy generated by the salt difference power generation device 300 may be: the power generation power of the salt difference power generation device 300 drops to the power critical value, or the temperature difference between the low-salt solution and the high-salt solution is less than the temperature critical value, or the salinity difference between the low-salt solution and the high-salt solution is less than the salinity critical value.

[0076] In this embodiment, when the salt difference power generation device 300 also includes a photothermal conversion component 350, and when there is sunlight in the environment, the photothermal conversion component 350 absorbs solar thermal energy and transfers it to the low-salt solution in the dilute liquid chamber 320, thereby promoting the evaporation of water in the low-salt solution in the dilute liquid chamber 320.

[0077] In this embodiment, when the salt difference power generation device 300 also includes a heat storage component 360, and when there is sunlight in the environment, the heat storage component 360 absorbs solar thermal energy and stores heat through phase change. When the sunlight in the environment disappears, the heat storage component 360 releases latent heat and transfers it to the dilute liquid chamber 320, so that the low-salt solution maintains a higher temperature and maintains the temperature difference between the low-salt solution and the high-salt solution.

[0078] The cooling water circulation method of the air-conditioning energy-saving system utilizes the connection between the cooling water loop 110 and the salt difference power generation device 300, and discharges the cooling water of the cooling water loop 110 into the dilute liquid chamber 320 to dilute the low-salt solution. At the same time, the condensed pure water formed by the water of the low-salt solution in the dilute liquid chamber 320 absorbing solar heat energy and evaporating can be discharged into the cooling water loop 110 to replenish the cooling water, thereby realizing the cogeneration of water and electricity. Not only the power generation performance of the salt difference power generation device 300 is improved, but also the salt impurities in the cooling water loop 110 can be effectively reduced, thereby extending the service life of the central air-conditioning device 100.

[0079] Embodiment 3

[0080] This embodiment provides a power supply method for an air conditioning energy-saving system, which is applicable to the air conditioning energy-saving system described in Embodiment 1. The power supply method for the air conditioning energy-saving system includes the following steps:

[0081] S21. The salt difference power generation device 300 continues to operate, and the generated electrical energy is stored in the energy storage device 400;

[0082] S22. When the environment has sufficient sunlight, the central air conditioning device 100 is powered by the photovoltaic power generation device 200, and the excess electrical energy generated by the photovoltaic power generation device 200 is stored in the energy storage device 400;

[0083] S23. When the sunlight in the environment is insufficient, the central air conditioning device 100 is powered by the photovoltaic power generation device 200 and the energy storage device 400;

[0084] S24. When the sunlight in the environment disappears, the central air conditioning device 100 is powered by the energy storage device 400.

[0085] The power supply method of the air-conditioning energy-saving system utilizes two groups of new energy power generation devices to jointly supply power to the central air-conditioning device. When the light conditions are sufficient, the photovoltaic power generation device 200 becomes the main power supply source to ensure the efficient operation of the central air-conditioning device; when the light conditions are insufficient or at night, the salt difference power generation device 300 automatically fills in and continuously and stably provides power to the central air-conditioning device, ensuring an uninterrupted supply of clean energy throughout the year. It not only significantly reduces dependence on traditional power grids, reduces fossil fuel consumption and greenhouse gas emissions, achieves all-weather, high-efficiency energy conservation and emission reduction goals, but also improves the diversity and reliability of energy utilization.

[0086] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An air conditioning energy-saving system, characterized in that: include: A central air conditioning device, comprising a power supply circuit and a cooling water circuit, wherein the cooling water circuit comprises a condenser and a cooling tower, wherein the water outlet of the condenser is communicated with the water inlet of the cooling tower, the water outlet of the cooling tower is communicated with the water inlet of the condenser, the water outlet of the condenser constitutes a drain outlet of the cooling water circuit, and the water inlet of the cooling tower constitutes a water replenishment inlet of the cooling water circuit; A photovoltaic power generation device, comprising a light energy receiving end and an electric energy output end, wherein the solar energy received by the light energy receiving end is converted into electric energy and then output by the electric energy output end; A salt difference power generation device, comprising a concentrated liquid chamber, a dilute liquid chamber, a condensation chamber and electrodes, wherein the concentrated liquid chamber is separated from the dilute liquid chamber, and an ion selective channel is provided between the concentrated liquid chamber and the dilute liquid chamber, wherein a high salt solution is contained in the concentrated liquid chamber, and a low salt solution is contained in the dilute liquid chamber, wherein the ion selective channel allows ions in the concentrated liquid chamber to selectively pass through, wherein the electrodes are respectively arranged in the concentrated liquid chamber and the dilute liquid chamber, and wherein the electrodes are respectively in contact with the high salt solution and the low salt solution; wherein the condensation chamber is arranged above the dilute liquid chamber and is interconnected with the dilute liquid chamber, wherein the water content of the low salt solution in the dilute liquid chamber absorbs solar heat energy and evaporates, and then condenses in the condensation chamber to form condensed pure water, and the condensed pure water is discharged through the condensation outlet of the condensation chamber; as well as Energy storage devices; Among them, the power output end and the electrode are electrically connected to the energy storage device respectively, and the power output end and the energy storage device are electrically connected to the power supply circuit respectively; the drain outlet of the cooling water circuit is connected to the dilute liquid chamber, and the water replenishment port of the cooling water circuit is connected to the condensation water outlet.

2. The air conditioning energy saving system according to claim 1, characterized in that: The condensation chamber comprises a condensation plate, the inner side of the condensation plate is provided with a collecting groove, the opening of the collecting groove faces upward, and the collecting groove is connected with the condensation water outlet; or The condensation chamber includes at least two condensation plates, each of which is provided with a collecting groove on the inner side surface, the open opening of the collecting groove faces upward, two adjacent condensation plates are connected, the collecting grooves on two adjacent condensation plates are connected, and the collecting groove on at least one of the condensation plates is connected to the condensation water outlet.

3. The air conditioning energy saving system according to claim 2, characterized in that: The single condensation plate includes a condensation part and a collecting part. The condensation part is arranged above the collecting part and connected to the collecting part. The condensation part is inclined facing the dilute liquid chamber. The collecting groove is arranged on the inner side surface of the collecting part, and the opening of the collecting groove faces the condensation part.

4. The air conditioning energy saving system according to claim 3, characterized in that: The condensation part is made of a material with a light transmittance greater than 95%.

5. The air conditioning energy saving system according to claim 2, characterized in that: When the condensation chamber includes a condensation plate, the collecting trough is inclined relative to the horizontal plane, and the lower end of the collecting trough is connected to the condensation water outlet; or When the condensation chamber includes at least two condensation plates, at least two of the collecting grooves are inclined relative to the horizontal plane and have the same inclination direction, and the lowermost ends of at least two of the collecting grooves are connected to the condensation water outlet.

6. The air conditioning energy saving system according to claim 5, characterized in that: The inclination angle ∠θ of the collecting trough is 3~5°.

7. The air conditioning energy saving system according to claim 1, characterized in that: The salt difference power generation device also includes a photothermal conversion component, which includes a light absorber and a heat conductor. The light absorber is arranged in the condensation chamber and / or the dilute liquid chamber, the heat conductor is arranged in the dilute liquid chamber and in contact with the low-salt solution, the light absorber is thermally connected to the heat conductor, the light absorber is used to absorb solar thermal energy, and the heat conductor is used to transfer heat energy to the low-salt solution in the dilute liquid chamber.

8. The air conditioning energy saving system according to claim 1, characterized in that: The salt difference power generation device also includes a heat storage component, which is arranged on the outer side of the dilute liquid chamber. The heat storage component is filled with a phase change material, which is used to absorb solar thermal energy and store heat through phase change or release phase change latent heat and transfer it to the low-salt solution in the dilute liquid chamber.

9. The air conditioning energy saving system according to claim 1, characterized in that: The passage between the condensation water outlet and the water replenishment port is provided with a water storage container and a water replenishment valve, and the water replenishment valve is located downstream of the water storage container; the passage between the condensation water outlet and the water replenishment port is provided with a second temperature sensor, and the second temperature sensor is located upstream of the water storage container. The second temperature sensor is used to monitor the temperature of condensed pure water discharged from the condensation water outlet.

10. The air conditioning energy saving system according to claim 1, characterized in that: An insulation container and a drain valve are provided on the passage between the drain port and the dilute liquid chamber, and the drain valve is located upstream of the insulation container; a first temperature sensor is provided on the passage between the drain port and the dilute liquid chamber, and the first temperature sensor is located upstream of the drain valve, and the first temperature sensor is used to monitor the temperature of cooling water discharged from the drain port.

11. The air conditioning energy saving system according to claim 1, characterized in that: The cooling water circuit also includes a water supply pump, a cooling water pump and a flow controller. The water outlet of the condenser is connected to the water inlet of the flow controller, the water outlet of the flow controller is connected to the water inlet of the water supply pump, the water outlet of the water supply pump is connected to the water inlet of the cooling tower, the water outlet of the cooling tower is connected to the water inlet of the cooling water pump, and the water outlet of the cooling water pump is connected to the water inlet of the condenser; the water outlet of the condenser constitutes the drain outlet of the cooling water circuit, and the water inlet of the flow controller constitutes the water replenishment port of the cooling water circuit.

12. A cooling water circulation method for an air conditioning energy-saving system according to any one of claims 1 to 11, characterized in that: The following steps are involved: S11. The cooling water in the cooling water circuit enters the cooling tower for cooling, and then enters the condenser for heat exchange with the refrigerant, and a portion of the high-temperature cooling water after the heat exchange enters the cooling tower; S12. When the power generated by the salt difference power generation device is insufficient, another portion of the high-temperature cooling water after heat exchange in the cooling water circuit is discharged into the dilute liquid chamber through the drain port; S13. The water content of the low-salt solution in the dilute liquid chamber absorbs solar heat energy and evaporates, and then condenses in the condensation chamber to form condensed pure water, which is discharged through the condensation water outlet. When the cooling water in the cooling water circuit is insufficient, the condensed pure water is discharged into the cooling water circuit through the water replenishment port.

13. A method for supplying power to an air conditioning energy-saving system according to any one of claims 1 to 11, characterized in that: The following steps are involved: S21. The salt difference power generation device continues to operate, and the generated electrical energy is stored in the energy storage device; S22. When the environment has sufficient sunlight, the central air conditioning device is powered by the photovoltaic power generation device, and the excess electrical energy generated by the photovoltaic power generation device is stored in the energy storage device; S23. When the sunlight in the environment is insufficient, the central air conditioning device is powered by the photovoltaic power generation device and the energy storage device; S24. When the sunlight in the environment disappears, the central air-conditioning device is powered by the energy storage device.

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