Solar full-spectrum driven zero-carbon air conditioning system

Abstract

The utility model discloses a solar full-spectrum-driven zero-carbon air conditioning system which comprises a solar photovoltaic system, a dehumidifier and a reverse-flow dew-point evaporative cooler. The solar photovoltaic system comprises a solar photovoltaic panel, a storage battery and a water tank, and a water cooling plate is arranged on the solar photovoltaic panel; the storage battery is used for storing electric energy generated by the solar photovoltaic panel and supplying power to the fan, and the water cooling plate is used for collecting heat generated by the solar photovoltaic panel and storing heated water in the water tank; the dehumidifier adopts an MOFs material as a desiccant and comprises two dehumidification modules, and the two dehumidification modules adopt a dehumidification-desorption alternate cycle working mode and alternately execute dehumidification operation and regeneration operation; the reverse-flow dew-point evaporative cooler comprises a dry channel and a wet channel, dry air dehumidified by the dehumidifier is divided into two parts at the tail end of the dry channel after passing through the dry channel, one part serves as working air to enter the wet channel to promote evaporation of a water film on the surface of the wet channel, and the other part serves as product air to be exhausted.

Description

Solar full-spectrum driven zero-carbon air conditioning system Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically a solar full-spectrum driven zero-carbon air conditioning system. Background Technology

[0002] In recent years, with population growth, urbanization, and global warming, the demand for air cooling has increased significantly. However, commercially available vapor compression air conditioners suffer from high power consumption, low coefficient of performance (COP), and environmental pollution. Building energy consumption in China accounts for 44.8% of total social energy consumption, with over 40% coming from air conditioning systems. The "2024 China Urban and Rural Construction Carbon Emission Research Report" shows that in 2022, the total energy consumption of buildings nationwide reached 2.42 billion standard coal equivalents, with total carbon emissions reaching 5.13 billion tons of CO2, accounting for 48.3% of the country's energy-related carbon emissions. As of 2023, my country had over 600 million air conditioners, with an urban household penetration rate exceeding 90% and a rural penetration rate surpassing 60%. Furthermore, global demand for air conditioning continues to grow, projected to increase by approximately 35% from 2010 to 2035.

[0003] The mainstream vapor compression cooling cycle relies heavily on refrigerants, consuming large amounts of fossil fuels and causing environmental problems such as greenhouse gas emissions and ozone layer depletion. In recent years, dew point evaporative cooling technology has been considered a replacement for traditional cooling cycles due to its excellent cooling performance, low energy consumption, and environmental friendliness. However, the cooling effect of dew point evaporative water-cooled plates decreases significantly in high humidity environments, requiring the installation of dehumidifiers. Traditional dehumidification technologies suffer from high energy consumption due to the instability of solid desiccants, limited water adsorption capacity, and stringent regeneration conditions. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a solar full-spectrum driven zero-carbon air conditioning system that has excellent cooling effect while saving energy and reducing carbon emissions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A solar-powered full-spectrum driven zero-carbon air conditioning system includes a solar photovoltaic system, a dehumidifier, and a counter-flow dew point evaporative cooler;

[0007] The solar photovoltaic system includes a solar photovoltaic panel, a battery, and a water tank. The solar photovoltaic panel is equipped with a water-cooled plate. The battery is used to store the electrical energy generated by the solar photovoltaic panel based on short-wavelength spectral energy and to power the wind turbine. The water-cooled plate is used to collect the heat generated by the solar photovoltaic panel based on long-wavelength spectral energy and to store the heated water in the water tank.

[0008] The dehumidifier uses metal-organic framework (MOF) material as the desiccant and includes two dehumidification modules. The two dehumidification modules adopt an alternating dehumidification-desorption cycle working mode and alternately perform dehumidification and regeneration operations through a timed switching device.

[0009] The counter-flow dew point evaporative cooler includes a dry channel and a wet channel. The dry air after being dehumidified by the dehumidifier is split into two parts at the end of the dry channel. One part is used as working air and enters the wet channel to promote the evaporation of the water film on the surface of the wet channel, and the other part is used as product air and is discharged.

[0010] The fan includes an intake fan, the air outlet of which is connected to the dehumidification module performing the dehumidification operation to dry the air. The liquid outlet pipe of the water tank is connected to the dehumidification module performing the regeneration operation to heat and regenerate the dehumidification module. The desorbed water generated by the dehumidification module performing the regeneration operation is used to supply the water-cooled plate and / or the counter-flow dew point evaporative cooler.

[0011] Furthermore, the metal-organic framework (MOF) uses MIL-101(Cr) as a desiccant.

[0012] Furthermore, the dehumidification module employs a finned heat exchanger.

[0013] Furthermore, the metal-organic framework (MOF) material is uniformly coated on the surface of the finned heat exchanger.

[0014] Furthermore, by employing a multiple-drop coating method, the coating thickness of the metal-organic framework (MOF) material reaches 0.3 mm.

[0015] Furthermore, the timed switching device controls the two dehumidification modules to alternately perform dehumidification and regeneration operations at intervals of 10 minutes.

[0016] Furthermore, the water stored in the water tank is at a temperature of 60°C, and the operating temperature of the solar photovoltaic panel is reduced to 67.79°C after being cooled by the water-cooling plate.

[0017] Furthermore, the geometric parameters of the dry channel and wet channel of the counter-flow dew point evaporative cooler are: channel height 2mm and channel length 600mm.

[0018] Furthermore, the air outlet channel of the air inlet fan is connected to the two dehumidification modules respectively through a three-way valve.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model presents a solar-powered, full-spectrum-driven, zero-carbon air conditioning system that achieves excellent cooling performance while saving energy and reducing carbon emissions. Specifically, it utilizes metal-organic framework (MOF) materials as the desiccant, solving the problem of traditional solid desiccants being unable to utilize internal system heat for regeneration due to stringent regeneration conditions. The dehumidifier employs two dehumidification modules operating in an alternating cycle mode to achieve continuous dehumidification. Simultaneously, it collects water vapor from humid air for cooling in a counter-current dew-point evaporative cooler, enabling water self-circulation and reducing operating costs. Furthermore, a water-cooled plate is installed on the solar photovoltaic panel, enabling full-spectrum-driven system operation. Specifically, it combines photoelectric and photothermal conversion. Short-wave energy is used for photoelectric conversion and stored in a battery to power the system fan, while long-wave energy is used to generate heat and heat the water in the water-cooled plate, which is then stored in a water tank for desiccant regeneration. This achieves full-spectrum utilization, enabling zero-carbon system operation, improving solar energy utilization, reducing photovoltaic panel operating temperature, and increasing output power. With the addition of a dehumidifier, the counter-current dew point evaporative cooler breaks through the cooling limits of existing evaporative cooling technology, further improving the cooling effect and increasing the coefficient of performance (COP). In summary, this novel solar-powered full-spectrum driven zero-carbon air conditioning system can significantly reduce operating costs, improve energy utilization, and achieve remarkable energy conservation and emission reduction effects, while also providing excellent cooling performance.

[0021] The main innovative features of this utility model are as follows:

[0022] (1) MIL-101(Cr) was selected as the desiccant to construct an alternating desiccant, which overcomes the disadvantage that traditional desiccants cannot be regenerated by the heat inside the system, greatly reduces the cost of desiccant, and achieves sustainable and efficient desiccant.

[0023] (2) By "taking water from the air," a self-circulating water system is achieved. Based on the high water absorption and easy regeneration properties of MIL-101(Cr), moisture in the humid air can be captured by the system, used for evaporative cooling in the cooler, and then discharged back into the atmosphere, thus improving energy efficiency.

[0024] (3) The system is driven by a full spectrum. While the photovoltaic panel supplies power to the wind turbine, it absorbs 80% of the long-wave energy of the sun for desiccant regeneration, thus achieving full spectrum utilization of the sun and realizing zero-carbon operation of the system. Attached Figure Description

[0025] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0026] Figure 1 is an architectural diagram of an embodiment of the solar full-spectrum driven zero-carbon air conditioning system of this utility model;

[0027] Figure 2 is a schematic diagram of a solar full-spectrum driven zero-carbon air conditioning system;

[0028] Figure 3 is a schematic diagram of the full-spectrum drive;

[0029] Figure 4 is a flowchart of the preparation method of MIL-101(Cr);

[0030] Figure 5 shows the SEM image of MIL-101(Cr);

[0031] Figure 6 shows the hydrophilicity test of the coated sample;

[0032] Figure 7 shows the isothermal adsorption curves of MIL-101(Cr);

[0033] Figure 8 shows the coating and actual coating effect of MOFs materials; (a) coating process of composite water-absorbing material; (b) actual coating effect of composite coating material;

[0034] Figure 9 shows the alternating dehumidification-desorption cycle working mode of the two dehumidification modules;

[0035] Figure 10 shows the self-circulation of water in highly humid air;

[0036] Figure 11 shows the effect of geometric changes on the performance of the cooling system; (a) cooling channel height; (b) cooling channel length;

[0037] Figure 12 shows the 12MIL-101(Cr) sample;

[0038] Figure 13 shows a physical image of a solar-powered full-spectrum zero-carbon air conditioning system.

[0039] Figure 14 shows the simulation and testing of the water absorption performance of MIL-101(Cr) material; (a) COMSOL simulation of air humidity change cloud map; (b) rapid transient response of the dehumidification channel; (c) the effect of environmental temperature and humidity changes on dehumidification performance; (d) the effect of geometric parameter changes on dehumidification performance.

[0040] Figure 15 shows the stability test of the MOF coating; (a) initial state; (b) ten cycles; (c) stability curve;

[0041] Figure 16 shows the effect of changes in operating conditions on the performance of the cooling system; (a) ambient temperature; (b) ambient humidity; (c) wind speed; (d) working-product airflow ratio. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0043] As shown in Figure 1, the solar-powered full-spectrum driven zero-carbon air conditioning system of this embodiment includes a solar photovoltaic system, a dehumidifier, and a counter-flow dew point evaporative cooler. Through the combination of these three parts, zero-carbon deep cooling can be achieved even in high humidity environments.

[0044] The solar photovoltaic system includes solar photovoltaic panels, a battery, and a water tank. A water-cooled plate is installed on the solar photovoltaic panels. The battery stores the electrical energy generated by the solar photovoltaic panels based on short-wavelength spectral energy and powers the wind turbine. The water-cooled plate collects the heat generated by the solar photovoltaic panels based on long-wavelength spectral energy and stores the heated water in the water tank. In this embodiment, the water temperature stored in the tank is 60°C, which also reduces the operating temperature of the solar photovoltaic panels. After being cooled by the water-cooled plate, the operating temperature of the solar photovoltaic panels drops to 67.79°C, increasing the output power from 18% to 18.61%.

[0045] The dehumidifier uses metal-organic framework (MOF) materials as the desiccant. The water absorption and regenerability of MOF materials enable continuous and efficient dehumidification, with a dehumidification rate of up to 1.34 g / min. The dehumidifier has two modes: dehumidification and regeneration. In dehumidification mode, the water absorption of the MOF materials is used to dehumidify the air. In regeneration mode, collected hot water is used to heat and regenerate the saturated MOF materials, desorbing moisture and restoring their water absorption. The desorbed water is collected and used in a subsequent counter-current dew point evaporative cooler, or it can be used as a cooling medium for a water-cooled plate. In this embodiment, the dehumidifier includes two dehumidification modules. The two modules operate in an alternating dehumidification-desorption cycle, and a timer switching device alternates between dehumidification and regeneration. That is, while one dehumidification module is dehumidifying the air, the other module is undergoing heating and regeneration.

[0046] In this embodiment, the timed switching device controls the two dehumidification modules to alternately perform dehumidification and regeneration operations at intervals of 10 minutes, thereby achieving continuous and efficient dehumidification.

[0047] The fan includes an intake fan, a dry air outlet fan, and a humid air outlet fan. In this embodiment, the outlet channel of the intake fan is connected to the dehumidification module that performs the dehumidification operation to dry the air. Specifically, the outlet channel of the intake fan is connected to two dehumidification modules respectively through a three-way valve. The three-way valve can be used to easily switch the fan's outlet channel to be connected to the dehumidification module that is performing the dehumidification operation and to be disconnected from the dehumidification module that is performing the regeneration operation.

[0048] In this embodiment, the outlet pipe of the water tank is connected to the dehumidification module performing the regeneration operation to heat and regenerate the dehumidification module. The desorbed water generated by the dehumidification module performing the regeneration operation is used to supply the water-cooled plate and / or the counter-current dew point evaporative cooler. In this embodiment, part of the desorbed water is used to supply the water-cooled plate, and part is supplied to the working water tank of the counter-current dew point evaporative cooler.

[0049] The counter-flow dew point evaporative cooler consists of a dry channel and a wet channel, which are adjacent to each other and the air flows in opposite directions within the dry and wet channels. The dry air, dehumidified by the dehumidifier, is split into two parts at the end of the dry channel. One part serves as working air and enters the wet channel to promote the evaporation of the water film on the surface of the wet channel, absorbing heat from the dry channel and pre-cooling the subsequent airflow into the dry channel. This wet air is then discharged from the cooler via a humid air outlet fan. The other part serves as product air and is discharged into the room via a dry air outlet fan. This cycle continues, cooling the air to near the dew point temperature, achieving the desired indoor cooling effect.

[0050] In summary, the solar full-spectrum driven zero-carbon air conditioning system of this embodiment achieves high-efficiency cooling with zero energy supply under most climatic conditions, especially in high-temperature and high-humidity environments, through the coupling and complementary advantages of the three parts: the full-spectrum driven solar photovoltaic system, the dehumidifier, and the counter-flow dew point evaporative cooler.

[0051] As shown in Figure 2, this embodiment combines a solar photovoltaic panel, a counter-flow dew point evaporative cooler, and a dehumidifier to form a solar-powered full-spectrum driven zero-carbon air conditioning system. This embodiment's solar-powered full-spectrum driven zero-carbon air conditioning system can overcome the cooling limit of evaporative coolers in high-humidity environments, reducing the temperature of high-temperature, high-humidity air to below 20°C, thus having a wider range of applications. Simultaneously, it utilizes the full spectrum of solar thermal energy to achieve zero-carbon operation. The key technologies related to the solar-powered full-spectrum driven zero-carbon air conditioning system proposed in this embodiment include full-spectrum driving, an alternating circulation dehumidifier based on MOFs, self-circulation of water in high-humidity air, and cooler structure optimization, which are discussed in detail below.

[0052] 1. Full-spectrum driving

[0053] Solar photovoltaic (PV) panels have an energy conversion efficiency of only 18%, with the remaining energy released as waste heat, causing the panels to heat up. For every 1°C increase in the operating temperature of the PV panel, its power generation efficiency decreases by 0.05%. Short-wavelength light is suitable for photovoltaic conversion, while long-wavelength light is suitable for photothermal conversion. As shown in Figure 3, this embodiment combines solar PV panels with a dehumidifier to use waste heat to heat the water in the heat exchange conduits of the cooling plate, and then uses the heat for the regeneration of the metal-organic framework (MOF) material. After the solar PV panels are actively cooled through the heat exchange conduits on their back, the electricity generated powers all the fans in the system. This full-spectrum utilization of photothermal energy overcomes the limitations of traditional solar power supply, increasing the solar energy utilization rate to 58%.

[0054] 2. Dehumidifier

[0055] 2.1 Selection of MOFs

[0056] Most MOF materials are hygroscopic. To meet the dehumidification requirements under nominal conditions (34℃, 75%RH), MIL-101(Cr) was selected as the desiccant in this embodiment, which has a narrow range of variation and a net water absorption of 1.044 g / g. The SEM, hydrophilicity / hydrophobicity characterization, and isothermal adsorption curves of the MIL-101(Cr) sample are shown in Figures 5-7.

[0057] 2.2 Preparation and Coating of MOFs

[0058] The dehumidification module uses a finned heat exchanger. Metal-organic framework (MOF) material is uniformly coated onto the surface of the finned heat exchanger using a multiple-drop coating method to achieve a MOF material coating thickness of 0.3 mm. To ensure uniform distribution of the MOF material on the surface of the finned heat exchanger and further improve water absorption performance, in this embodiment, the MOF material, PVA, and silica gel are mixed to form a composite coating material, which is then applied to the surface of the finned heat exchanger. In this embodiment, a 0.3 mm coating is formed on the heat exchanger fins. The specific coating method and actual coating effect are shown in Figure 8.

[0059] In this embodiment, the method for coating the composite coating material onto the surface of the finned heat exchanger is as follows: first, a mixed solution is prepared by combining metal-organic framework (MOF) material, PVA, silica gel, and deionized water; then, the mixed solution is drop-coated onto the surface of the finned heat exchanger; and finally, the mixed solution drop-coated onto the surface of the finned heat exchanger is dried.

[0060] In this embodiment, the mixed solution is prepared by mixing metal-organic framework (MOFs) material, PVA, silica gel and deionized water in a volume ratio of 4:3:16:50. First, PVA and silica gel are mixed, then the metal-organic framework (MOFs) material is added and mixed. Finally, the mixed material is dissolved in deionized water and stirred at a set temperature for a set time to obtain the mixed solution.

[0061] In this embodiment, a multi-drop coating method is used to achieve a coating thickness of 0.3 mm.

[0062] 2.3 MOF-based alternating operation dehumidifier

[0063] MOFs materials exhibit different adsorption or desorption effects at different relative humidities. Based on the different effects of MOFs, the dehumidifier is divided into dehumidification mode and regeneration mode, with the time for both processes set to 10 minutes. To ensure continuous operation of the dehumidifier, this embodiment uses two heat exchangers coated with MOFs composite materials. The two heat exchangers alternately perform dehumidification and regeneration operations, forming a dehumidification-desorption alternating operation mode. The mode switching of the dehumidifier is shown in Figure 9.

[0064] 3. Water self-circulation

[0065] After the dehumidifier becomes saturated with water in dehumidification mode, it releases the water in regeneration mode. As shown in Figure 10, this achieves water self-circulation.

[0066] 4. Cooler structure optimization

[0067] This embodiment analyzes the impact of the single-stage channel height and channel length of the dew point evaporative cooler on the system's cooling performance. As shown in Figure 11(a), a smaller cooling channel height results in higher convective heat transfer efficiency, higher cooling performance, and higher COP. However, if the height is too low, the manufacturing difficulty and cost increase. As shown in Figure 11(b), as the channel length increases, the cooling effect initially improves and then tends to stabilize. This is because the convective heat transfer rate decreases as the heat transfer area increases. Taking all factors into consideration, the geometric parameters of the dry and wet channels of the counter-flow dew point evaporative cooler in this embodiment are: channel height 2mm and channel length 600mm.

[0068] 5. Experimental verification

[0069] 5.1 Presentation of Phase Results and Cost Composition

[0070] Figures 12-13 show the prepared MIL-101(Cr) sample and the physical images of the solar-powered full-spectrum-driven zero-carbon air conditioning system, respectively. The cost composition of the solar-powered full-spectrum-driven zero-carbon air conditioning system in this embodiment is shown in Table 1.

[0071] Table 1 Cost Composition

[0072]

[0073]

[0074] 5.2 Experimental Analysis

[0075] 5.2.1 Simulation and Testing of Water Absorption Properties of MIL-101(Cr) Material

[0076] In this embodiment, a transient simulation of the adsorption dehumidification channel was established using COMSOL, as shown in Figure 14(a). Due to the adsorption of water molecules by the MIL-101 porous medium, the humidity of the air decreases along the flow direction. As shown in Figure 14(b), after dehumidification begins, the air humidity decreases rapidly along the channel initially, then slows down, reaching a steady state in about 10 seconds. This embodiment further investigated the dehumidification performance under high temperature and high humidity conditions, as shown in Figure 14(c). Compared to temperature, the dehumidifier is more sensitive to humidity changes. When the humidity varies between 65% and 95%, the dehumidifier can reduce the air humidity to about 20% RH, demonstrating excellent dehumidification performance in high temperature and high humidity environments. Furthermore, as shown in Figure 14(d), the lower the channel height, the better the dehumidification effect, because the mass transfer near the fluid-solid contact wall is more intense, resulting in better adsorption of water molecules in the thin air layer. Based on the above analysis, a channel size of 5 mm in height and 300 mm in length was selected for subsequent analysis and calculations. The average water absorption rate of the MIL-101(Cr) sample was 0.88 g / g, and the maximum water absorption rate was 1.099 g / g. This example also tested the adsorption-desorption stability of the sample, and the test results are shown in Figure 15.

[0077] 5.2.2 Cooler Performance Analysis

[0078] To explore the application potential of the cooler, its cooling performance under varying operating conditions was analyzed. As shown in Figures 16(a)-(b), the cooler exhibits excellent stability when the ambient temperature varies from 32–42℃ and the relative humidity from 0.7–0.95, maintaining the air temperature below 24℃, with a minimum of 18.9℃. As shown in Figure 16(c), the dehumidification effect is more pronounced and the cooling effect is better at low airflow rates, resulting in a larger temperature difference compared to systems without a dehumidifier. As shown in Figure 16(d), an increased airflow ratio leads to more working air flowing into the humidification channel, stimulating evaporative cooling and resulting in superior cooling performance. Under varying operating conditions, dehumidification leads to a greater cooling rate, and solar power heating reduces system energy consumption. The COP of the cooling system is significantly improved, with maximum increases of 2.78, 12.83, 4.21, and 2.88 times compared to systems without a dehumidifier, respectively.

[0079] 6. Application and Energy Saving and Emission Reduction Benefits

[0080] The solar full-spectrum driven zero-carbon air conditioning system in this embodiment recovers and utilizes waste heat from photovoltaic panels, is driven by the full spectrum of solar energy, assists in cooling the solar panels, improves the power generation efficiency of the photovoltaic system, and achieves zero-carbon operation within the system. It can improve the solar energy utilization rate by 40% compared to ordinary photovoltaic systems.

[0081] With a certain 22m 2Taking student dormitories as an example, replacing the existing 1070W Hisense KFR-35GW / 99-N3 air conditioners, considering the subtropical climate of the dormitory area and the air conditioner compressor operating at 70% capacity, with an average daily operating time of 10 hours per dormitory room during the summer months of May to August, would save each dormitory 1.07kW × 10h × 122 days × 70% = 915 kWh of electricity per year. At a local electricity price of 0.7215 yuan / kWh, this translates to an annual saving of 660.17 yuan per dormitory room. The payback period is 2868.31 ÷ 660.17 = 4.34 years. With an estimated lifespan of 15 years, after deducting costs, the annual savings over the lifespan would be (15 - 4.34) × 915 ÷ 10 = 975 kWh, approximately 703 yuan.

[0082] In summary, the solar-powered full-spectrum zero-carbon air conditioning system offers excellent cooling performance while saving energy and reducing carbon emissions. Specifically, it utilizes metal-organic framework (MOF) materials as the desiccant, solving the problem of traditional solid desiccants being unable to utilize internal system heat for regeneration due to stringent regeneration conditions. The dehumidifier employs two dehumidification modules operating in an alternating cycle mode to achieve continuous dehumidification. Simultaneously, it collects water vapor from the humid air for cooling a counter-current dew point evaporative cooler, achieving water self-circulation and reducing operating costs. Furthermore, water-cooled plates are installed on the solar photovoltaic panels, enabling full-spectrum driven system operation. Specifically, photoelectric conversion and photothermal conversion are combined. Short-wave energy is used for photoelectric conversion and stored in a battery to power the system fan, while long-wave energy is used to generate heat and heat the water in the water-cooled plates, which is stored in a water tank for desiccant regeneration. This achieves full-spectrum utilization, enabling zero-carbon system operation, increasing solar energy utilization from 18% to 58%, while simultaneously reducing the photovoltaic panel operating temperature to 67.79℃ and increasing output power from 18% to 18.61%. After the addition of a dehumidifier, the cooler breaks through the cooling limit of existing evaporative cooling technology, and can cool the air to 20°C in high humidity environments, achieving a COP of 26, an improvement of 133%. The solar full-spectrum driven zero-carbon air conditioning system of this embodiment can significantly reduce operating costs, improve energy utilization, and achieve remarkable energy saving and emission reduction effects, while also providing excellent cooling performance.

[0083] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A solar-powered full-spectrum driven zero-carbon air conditioning system, characterized in that: The system includes a solar photovoltaic system, a dehumidifier, and a counter-current dew point evaporative cooler. The solar photovoltaic system comprises solar photovoltaic panels, a battery, and a water tank. The solar photovoltaic panels are equipped with water-cooled plates. The battery stores the electrical energy generated by the solar photovoltaic panels based on short-wavelength spectral energy and powers a fan. The water-cooled plates collect the heat generated by the solar photovoltaic panels based on long-wavelength spectral energy and store the heated water in the water tank. The dehumidifier uses metal-organic framework (MOF) materials as the desiccant and includes two dehumidification modules. These modules operate in an alternating dehumidification-desorption cycle and are alternately executed for dehumidification and regeneration via a timed switching device. The counter-current dew point evaporative cooler includes a dry channel and a wet channel. The dry air, after being dehumidified by the dehumidifier, is split into two parts at the end of the dry channel. One part enters the wet channel as working air to promote the evaporation of the water film on the surface of the wet channel, and the other part is discharged as product air. The fan includes an inlet fan, the outlet channel of which is connected to the dehumidification module performing the dehumidification operation to dry the air. The liquid outlet pipe of the water tank is connected to the dehumidification module performing the regeneration operation to heat and regenerate the dehumidification module. The desorbed water generated by the dehumidification module performing the regeneration operation is used to supply the water-cooled plate and / or the counter-current dew point evaporative cooler.

2. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The metal-organic framework (MOF) used was MIL-101(Cr) as the desiccant.

3. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The dehumidification module uses a finned heat exchanger.

4. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 3, characterized in that: The metal-organic framework (MOF) material is uniformly coated on the surface of the finned heat exchanger.

5. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 4, characterized in that: The metal-organic framework (MOF) material was coated to a thickness of 0.3 mm by using a multiple drop-coating method.

6. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The timed switching device controls the two dehumidification modules to alternately perform dehumidification and regeneration operations at intervals of 10 minutes.

7. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The water stored in the tank is at a temperature of 60°C, and the operating temperature of the solar photovoltaic panel is reduced to 67.79°C after being cooled by the water-cooling plate.

8. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The geometric parameters of the dry and wet channels of the counter-flow dew point evaporative cooler are: channel height 2mm and channel length 600mm.

9. The solar-powered full-spectrum driven zero-carbon air conditioning system according to claim 1, characterized in that: The air outlet channel of the air inlet fan is connected to the two dehumidification modules respectively through a three-way valve.

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