Wind-solar driven refrigerating machine

Abstract

The invention provides a wind-solar driven refrigerator, which relates to the technical field of renewable energy utilization and refrigeration, and comprises an energy supply module, a hybrid energy storage module, a refrigeration execution module and an intelligent control module, the energy supply module comprises a wind generating set and a solar photovoltaic panel array and is used for converting wind energy and solar energy into electric energy; the hybrid energy storage module comprises a storage battery pack used for storing electric energy and a phase change cold storage device used for storing cold energy. Through cooperative utilization of wind energy and solar energy, the intermittent defect of a single energy source is overcome, the continuity and stability of system power supply are remarkably improved, stepped storage and utilization of energy are achieved through the innovative hybrid energy storage design (storage battery and phase change cold storage), electric energy which is most difficult to store is preferentially used for refrigeration on site, and the energy storage efficiency is improved. And excessive energy which may be wasted due to battery saturation is stored in the form of cold energy, so that the energy comprehensive utilization efficiency of the whole system is improved.

Description

Technical Field

[0001] This invention relates to the field of renewable energy utilization and refrigeration technology, and more specifically, to a wind-solar driven refrigeration machine. Background Technology

[0002] With the global energy crisis and climate change becoming increasingly severe, the need for developing efficient and low-carbon refrigeration technologies is extremely urgent. Currently, mainstream compressor-type refrigerators heavily rely on fossil fuel-powered power grids, resulting in high energy consumption and significant indirect carbon emissions. To address this issue, renewable energy-driven refrigeration technologies have become a research hotspot.

[0003] Existing technologies include solar photovoltaic-driven refrigeration systems, but their energy supply is entirely dependent on solar radiation intensity, exhibiting significant intermittency and instability, and failing to operate effectively at night or during cloudy / rainy weather. Wind-driven refrigeration, on the other hand, is limited by random fluctuations in wind speed, resulting in insufficient reliability. This reliance on a single energy supply mode leads to the refrigeration system's inability to operate continuously and stably, resulting in low efficiency.

[0004] Furthermore, while traditional electrochemical battery energy storage (such as battery packs) can alleviate the problem of energy intermittency, it suffers from high cost, limited lifespan, limited charge-discharge cycles, and damage from deep discharge. If relying solely on batteries, the system's range is limited when dealing with prolonged cloudy or windless weather.

[0005] Therefore, the core challenges currently facing the technology lie in: how to efficiently integrate unstable wind and solar energy; how to design an economical and long-term energy storage and buffering mechanism to match continuous cooling demands; and how to intelligently switch cooling strategies based on environmental parameters to maximize the overall energy efficiency of the system. There is an urgent need for a new type of high-efficiency cooling system that can integrate multiple energy sources, possess multi-form energy storage capabilities, and adapt to environmental conditions. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wind and solar driven chiller with reasonable structure, high energy utilization rate, and stable and reliable operation.

[0007] Specifically, this application describes a wind- and solar-driven chiller. It includes: an energy supply module, a hybrid energy storage module, a cooling execution module, and an intelligent control module; The energy supply module includes a wind turbine generator and a solar photovoltaic panel array, used to convert wind energy and solar energy into electrical energy; The hybrid energy storage module includes a battery pack for storing electrical energy and a phase change cold storage device for storing cold energy. The refrigeration actuator is connected to the hybrid energy storage module to perform the refrigeration action; The intelligent control module is electrically connected to the energy supply module, the hybrid energy storage module, and the refrigeration execution module, and is used to control the working mode of the refrigeration execution module and the distribution and storage of energy according to environmental parameters and energy status.

[0008] As a preferred technical solution of this application, the solar photovoltaic panel array includes fixedly installed diagonal braces and vertical braces. One end of the diagonal brace and the vertical brace are fixedly connected by a connector. A fixed support is fixedly installed in the middle of the diagonal brace. One end of the fixed support is fixedly connected to the bottom of the vertical brace. A solar panel is detachably installed on the top of the diagonal brace.

[0009] As a preferred technical solution of this application, the intelligent control module includes an ambient temperature and humidity sensor for detecting the enthalpy value of outdoor air and controlling the refrigeration actuator to perform refrigeration actions accordingly. The refrigeration actuator is one of an evaporative cooling device, a fan, and an air conditioner. The intelligent control module also includes a charging controller, a rectifier, and an inverter.

[0010] As a preferred technical solution of this application, the intelligent control module is configured to prioritize the use of real-time wind and solar power generation energy; store excess electrical energy in the battery pack; and after the battery pack is saturated, use the excess electrical energy for cooling and store the generated cooling energy in the phase change cold storage device.

[0011] As a preferred technical solution of this application, the phase change cold storage device includes an insulated shell, the inner wall of which is provided with a plurality of modular cold storage units and an integrated heat exchange channel arranged on the inner wall of the insulated shell and the modular cold storage units.

[0012] As a preferred technical solution of this application, each of the modular cold storage units is a flat rectangular metal box, which is encapsulated with phase change material and filled with alumina nanoparticles and nucleating agents.

[0013] As a preferred technical solution of this application, the integrated heat exchange channel is coiled inside the modular cold storage unit, and the inner wall of the integrated heat exchange channel has metal fins.

[0014] As a preferred technical solution of this application, the heat-insulating shell includes a heat-insulating pipe and fixed clamps mounted on both ends of the heat-insulating pipe. The two fixed clamps are detachably connected by threaded posts and nuts. The integrated heat exchange channel is conveyed by a water pump.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: Energy complementarity and high system reliability: By utilizing wind and solar energy in a coordinated manner, the intermittent nature of a single energy source is compensated for, significantly improving the continuity and stability of the system's power supply and ensuring the continuous satisfaction of cooling needs.

[0016] Maximizing energy utilization efficiency: The innovative hybrid energy storage design (battery + phase change cold storage) realizes the "tiered" storage and utilization of energy, giving priority to the on-site use of the most difficult-to-store electrical energy for cooling, and storing the "excess energy" that may be wasted due to battery saturation in the form of cold energy, which greatly improves the overall energy utilization efficiency of the entire system.

[0017] Intelligent Adaptation and Control Optimization: The intelligent control module makes real-time decisions based on multi-source information (ambient temperature and humidity, energy status) and dynamically switches working modes (such as direct drive, energy storage, cold storage, and cold release) to ensure that the system always works in the optimal state, while expanding the climate applicability of efficient refrigeration technologies such as evaporative cooling.

[0018] Modular design and ease of maintenance: The modular units and split-shell design of the phase change cold storage device make system installation, expansion and maintenance very simple. The failure of a single unit does not affect the overall operation, reducing the maintenance cost throughout the entire life cycle.

[0019] Environmental protection and energy saving: The entire system operates with near-zero carbon emissions, which is environmentally friendly and effectively reduces users' electricity costs and peak load on the power grid. Attached Figure Description

[0020] Figure 1 This application provides an overall structural schematic diagram of a wind-solar driven chiller; Figure 2 A schematic diagram of a solar photovoltaic panel array structure for a wind-solar driven chiller provided in this application; Figure 3 A schematic diagram of a hybrid energy storage module for a wind-solar driven chiller provided in this application; Figure 4 A partial structural schematic diagram of a wind-solar-driven chiller hybrid energy storage module provided in this application; Figure 5 A partially cutaway structural diagram of a wind-solar-driven chiller hybrid energy storage module provided in this application; Figure 6 A wind- and solar-driven chiller provided in this application Figure 5 A schematic diagram of the local structure from a second-view perspective; Figure 7 This is a partial cross-sectional structural diagram of a wind-solar driven chiller hybrid energy storage module provided in this application.

[0021] Marked in the image: 1. Energy supply module; 11. Wind turbine generator set; 12. Solar photovoltaic panel array; 121. Diagonal strut; 122. Vertical strut; 123. Fixed support; 124. Solar panel; 2. Hybrid energy storage module; 21. Battery pack; 22. Phase change cold storage device; 221. Insulation shell; 222. Modular cold storage unit; 223. Integrated heat exchange channel; 224. Water pump; 3. Refrigeration execution module; 4. Intelligent control module. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Please see Figures 1 to 7 The present invention provides a technical solution: a wind and solar driven chiller, comprising: an energy supply module 1, a hybrid energy storage module 2, a refrigeration execution module 3, and an intelligent control module 4; The energy supply module 1 includes a wind turbine generator set 11 and a solar photovoltaic panel array 12, which are used to convert wind energy and solar energy into electrical energy. The wind turbine generator set 11 of the energy supply module 1 can be a small horizontal axis wind turbine generator, which is installed on the roof or at the wind outlet. The solar photovoltaic panel array 12 is installed on the sunny side of the roof through its support structure. The hybrid energy storage module 2 includes a battery pack 21 for storing electrical energy and a phase change cold storage device 22 for storing cold energy. Refrigeration actuator 3 is connected to the hybrid energy storage module to perform refrigeration actions; The intelligent control module 4 is electrically connected to the energy supply module 1, the hybrid energy storage module 2, and the cooling execution module 3, and is used to control the working mode of the cooling execution module and the distribution and storage of energy according to environmental parameters and energy status.

[0028] In a preferred embodiment, based on the above method, the solar photovoltaic panel array 12 further includes a fixedly installed diagonal brace 121 and a vertical brace 122. One end of the diagonal brace 121 and the vertical brace 122 are fixedly connected by a connector. A fixed support 123 is fixedly installed in the middle of the diagonal brace 121. One end of the fixed support 123 is fixedly connected to the bottom of the vertical brace 122. A solar panel 124 is detachably installed on the top of the diagonal brace 121.

[0029] As a preferred embodiment, based on the above method, the intelligent control module 4 further includes an ambient temperature and humidity sensor for detecting the enthalpy value of outdoor air and controlling the refrigeration actuator 3 to perform refrigeration actions accordingly. The refrigeration actuator 3 is one of an evaporative cooling device, a fan, and an air conditioner. The intelligent control module 4 also includes a charging controller, a rectifier, and an inverter, which can be in the form of an evaporative cooling device, a compression refrigeration unit (air conditioner), or a fan coil unit, etc., and works according to the instructions of the intelligent control module.

[0030] The intelligent control module 4 is the brain of the entire system. Its core is an embedded microprocessor (such as an ARM Cortex-M series). It monitors the wind and solar power generation and the state of charge (SOC) of the battery pack 21 in real time through current and voltage sensors, and collects the enthalpy value of outdoor air through temperature and humidity sensors. The module integrates a charging controller (MPPT controller), a rectifier, and an inverter.

[0031] As a preferred embodiment, based on the above method, the intelligent control module 4 is further configured to prioritize the use of real-time wind and solar power generation energy; store excess electrical energy in the battery pack 21; and after the battery pack 21 is saturated, use the excess electrical energy for cooling and store the generated cooling energy in the phase change cold storage device 22.

[0032] The charging controller receives electrical energy from the photovoltaic panels and wind turbine and intelligently adjusts it to charge the battery. If the wind turbine outputs alternating current (AC), a rectifier must be used to convert it to direct current (DC) because the battery can only store DC. The inverter converts the battery's DC power into 220V / 50Hz AC power for daily use.

[0033] The phase change cold storage device 22 includes an insulated shell 221, the inner wall of the insulated shell 221 is provided with multiple modular cold storage units 222, and an integrated heat exchange channel 223 arranged on the inner wall of the insulated shell 221 and the modular cold storage units 222.

[0034] Each modular cold storage unit 222 is a flat rectangular metal box (preferably aluminum alloy to enhance thermal conductivity), which is encapsulated inside with a phase change material (such as paraffin, hydrated salt, etc.) with a suitable phase change temperature (such as 5-15℃); in order to enhance the thermal conductivity of the phase change material and prevent overcooling, the material is uniformly filled with highly thermally conductive alumina nanoparticles and nucleating agents. Specifically, the main material is a carefully selected paraffin-based mixture with a phase transition temperature set at 16-18℃, perfectly matching the outlet water temperature range of the evaporative cooling system. The thermal conductivity enhancer is a high thermal conductivity material, such as expanded graphite powder or metal nanoparticles (e.g., alumina nanoparticles), uniformly dispersed in paraffin, which significantly improves the overall thermal conductivity of the composite PCM. A nucleating agent is added to prevent slight undercooling, ensuring that the PCM crystallizes rapidly near the phase transition temperature.

[0035] An integrated heat exchange channel 223 is coiled inside the modular cold storage unit 222. The inner wall of the integrated heat exchange channel 223 has metal fins. The integrated heat exchange channel 222 coils through the interior of one or more modular cold storage units to maximize the heat exchange contact area. The inner wall of the integrated heat exchange channel 222 is also welded with metal fins (such as aluminum fins), which further enhances the heat exchange efficiency between the heat exchange medium and the phase change material in the channel.

[0036] The insulated outer shell 221 includes an insulated pipe and fixed clamps mounted at both ends of the insulated pipe. The two fixed clamps are detachably connected by threaded posts and nuts. The integrated heat exchange channel 223 is pumped by a water pump 224. The phase change cold storage device 22 includes an insulated outer shell 221 made of materials such as polyurethane, which greatly reduces cold loss. The inner wall of the insulated outer shell 221 is provided with multiple modular cold storage units 222 arranged side by side, and the integrated heat exchange channel 223 is precisely arranged between the inner wall of the insulated outer shell and the modular cold storage units 222. This design achieves efficient and uniform heat exchange and facilitates the replacement of individual cold storage units.

[0037] In a preferred embodiment of the present invention, the intelligent control module is configured to execute energy management strategies with the following priorities: Priority is given to using the real-time wind and solar power generated by energy supply module 1 to directly drive the operation of cooling execution module 3; When the power generation is greater than the cooling power consumption, the excess electrical energy is stored in the battery pack 21. When the battery pack 21 reaches saturation, the excess electrical energy continues to be used to drive the cooling execution module 222 to cool, and the generated cooling energy is stored in the phase change cold storage device 22 through the heat exchange medium. When the real-time power generation is insufficient, the electrical energy stored in the battery pack 21 will be used first to supplement it; When the battery pack 21 is low on power and there is no real-time power generation, the cold energy stored in the phase change cold storage device 22 is used for cooling. When wind and solar power generation is insufficient and the battery pack charge is below a preset threshold, the cooling execution module stops working and only the cold energy stored in the phase change cold storage device 22 is used for cooling.

[0038] Specifically, when this wind-solar driven chiller is working / in use: When the system is working, the wind and solar power generation equipment continuously generates electricity. The intelligent controller 4 is the dispatch center of the entire system. Its core logic is "prioritize direct utilization, then store electricity, and finally store cold energy". During the day when there is good sunshine and sufficient wind, the electricity first meets the real-time cooling needs. The excess electricity charges the battery. After the battery is fully charged, the cooling equipment is started to generate cooling capacity and store it in the "cold battery" (phase change cold storage device). At night or when there is no wind, the electricity in the battery pack 21 is used first. After the power is exhausted, the cooling capacity stored in the phase change cold storage device 22 during the day is used. Through this multi-level storage and release strategy, the continuity of cooling service and zero energy waste are ensured.

[0039] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A wind- and solar-driven chiller, characterized in that, include: Energy supply module (1), hybrid energy storage module (2), refrigeration execution module (3) and intelligent control module (4); The energy supply module (1) includes a wind turbine generator set (11) and a solar photovoltaic panel array (12) for converting wind energy and solar energy into electrical energy; The hybrid energy storage module (2) includes a battery pack (21) for storing electrical energy and a phase change cold storage device (22) for storing cold energy. The refrigeration actuator (3) is connected to the hybrid energy storage module to perform the refrigeration action; The intelligent control module (4) is electrically connected to the energy supply module (1), the hybrid energy storage module (2), and the refrigeration execution module (3), and is used to control the working mode of the refrigeration execution module and the distribution and storage of energy according to environmental parameters and energy status.

2. The wind-solar driven chiller according to claim 1, characterized in that, The solar photovoltaic array (12) includes a fixedly installed diagonal brace (121) and a vertical brace (122). One end of the diagonal brace (121) and the vertical brace (122) are fixedly connected by a connector. A fixed support (123) is fixedly installed in the middle of the diagonal brace (121). One end of the fixed support (123) is fixedly connected to the bottom of the vertical brace (122). A solar panel (124) is detachably installed on the top of the diagonal brace (121).

3. A wind-solar driven chiller according to claim 1, characterized in that, The intelligent control module (4) includes an ambient temperature and humidity sensor for detecting the enthalpy of outdoor air and controlling the refrigeration actuator (3) to perform refrigeration actions. The refrigeration actuator (3) is one of an evaporative cooling device, a fan, and an air conditioner. The intelligent control module (4) also includes a charging controller, a rectifier, and an inverter.

4. A wind-solar driven chiller according to claim 3, characterized in that, The intelligent control module (4) is configured to prioritize the use of real-time wind and solar power generation energy; store excess electrical energy in the battery pack (21); and after the battery pack (21) is saturated, use the excess electrical energy for cooling and store the generated cooling energy in the phase change cold storage device (22).

5. A wind-solar driven chiller according to claim 4, characterized in that, The phase change cold storage device (22) includes an insulated shell (221), and the inner wall of the insulated shell (221) is provided with a plurality of modular cold storage units (222) and an integrated heat exchange channel (223) arranged on the inner wall of the insulated shell (221) and the modular cold storage units (222).

6. A wind-solar driven chiller according to claim 5, characterized in that, Each of the modular cold storage units (222) is a flat rectangular metal box encapsulated with phase change material and filled with alumina nanoparticles and nucleating agents.

7. A wind-solar driven chiller according to claim 6, characterized in that, The integrated heat exchange channel (223) is coiled inside the modular cold storage unit (222), and the inner wall of the integrated heat exchange channel (223) has metal fins.

8. A wind-solar driven chiller according to claim 7, characterized in that, The heat-insulating shell (221) includes a heat-insulating pipe and fixed clamps mounted on both ends of the heat-insulating pipe. The two fixed clamps are detachably connected by threaded posts and nuts. The integrated heat exchange channel (223) is conveyed by a water pump (224).

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