Stirring type wind energy heating and heat storage integrated system device capable of controlling heat release
By designing a controlled exothermic stirred wind energy heat-induced heat storage integrated system device, using 42% supersaturated sodium acetate solution as the working fluid, combining stirring heat-induced and heat storage, energy loss and abandonment in wind energy heat-induced technology is solved. The problem of high wind rate achieves efficient wind energy utilization and controllable heat storage and release.
Patent Information
- Application Number
- CN202411499583.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-02-07
AI Technical Summary
Among the existing wind energy heat-induced technologies, there are problems of energy loss and high wind decay rate, and most studies have failed to effectively combine heat storage and heat-induced.
A controlled exothermic stirred wind energy heat-induced heat storage integrated system device is designed, using 42% supersaturated sodium acetate solution as the heat-induced heat storage working fluid, and the rotor and disturbance are stirred through double-layer disc six-line blades. Components such as flow plates realize the combination of stirring and heat storage.
The device can achieve controllable storage and release of heat while ensuring excellent heat generation effect, reduce energy loss, improve wind energy utilization efficiency, and reduce wind decontamination rate.
Smart Images
Figure CN119394078A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of wind energy heating, and in particular to a controllable heat release stirring type wind energy heating and heat storage integrated system device. Background Art
[0002] Due to the instability and discontinuity of wind energy, the use of energy storage is extremely critical. The use of electric boilers, which convert wind energy into electrical energy and then into thermal energy, will result in energy loss. The direct use of heat storage combined with wind energy heating can effectively reduce the wind abandonment rate of wind energy resources. Therefore, studying how to simply and conveniently combine heating and heat storage is of great significance to the development of wind energy heating and clean heating.
[0003] At present, there have been a lot of studies on heating fluids, but most of the studies on heating fluids use a single solution or hydraulic oil fluid. Among them, high concentrations of sodium chloride and potassium chloride in a single solution have the best heating effect, but the heat storage effect of the fluid is not taken into account. In order to explore the integrated working fluid for wind energy heating and heat storage, further comprehensive consideration is needed from the heat storage aspect.
[0004] The inorganic phase change material sodium acetate trihydrate has a phase change temperature of 58°C, is non-toxic and odorless, has weak corrosiveness, and has a phase change enthalpy of up to 264 J / g. It is suitable for use as a household heating and heat storage material. However, as a type of inorganic hydrated salt phase change material, it has the defects of supercooling and phase separation that need to be improved.
[0005] Studies have shown that adding a certain proportion of water to sodium acetate trihydrate to prepare a supersaturated sodium acetate solution with a concentration of less than 56% can effectively reduce the occurrence of phase separation, and the supersaturated sodium acetate solution has good fluidity and can meet the needs of wind energy stirring heating.
[0006] Therefore, it is feasible to use supersaturated sodium acetate solution as the working fluid for wind energy stirring heating and heat storage integration. Summary of the invention
[0007] The purpose of the present invention is to provide a controllable heat release stirring wind energy heating and heat storage integrated system device, which adopts suitable phase change materials as the integrated heating and heat storage working fluid and is designed to be suitable for such solid and liquid two-phase working fluids.
[0008] The technical solution of the present invention is as follows:
[0009] A controllable heat release stirring type wind energy heat storage integrated system device, comprising a fan component, a stirring component, a heat storage device, and an electrode control component;
[0010] The wind turbine assembly is used to capture wind energy and convert it into mechanical energy;
[0011] The fan assembly is transmission-connected to the stirring assembly, and the shear force is provided by the stirring assembly;
[0012] The heat-generating and heat-storing device is used for stirring, heating and heat storage, and a heat-generating and heat-storing medium is arranged in the heat-generating and heat-storing device;
[0013] The electrode control component is arranged inside the thermal storage device, and promotes the thermal storage medium to crystallize and release heat after being energized.
[0014] Furthermore, the thermal storage device includes a mixing barrel and a heat-insulating layer arranged outside the mixing barrel, and the heat-insulating layer is used to enhance the heat storage effect.
[0015] Furthermore, a controllable heat release stirring wind energy heat storage integrated system device also includes a spoiler, which is arranged around the inside of the heat storage device and has a gap between the spoiler and the stirring component to increase the degree of turbulence and increase the stirring power.
[0016] Furthermore, the spoiler is a spoiler plate, and a plurality of adjacent spoilers are connected and fastened.
[0017] Furthermore, the heat storage medium uses a 42% supersaturated sodium acetate solution of a solid and liquid inorganic phase change material, and its advantages are as follows:
[0018] 1) The phase transition temperature of 42% supersaturated sodium acetate solution is 58°C, which is close to the temperature required for household heating. In addition, this type of material is non-toxic, non-corrosive, widely available, and low in price, making it suitable for use as a heat storage material for heating.
[0019] 2) The solid content of 42% supersaturated sodium acetate solution and cooling crystallization is about 20%, and its fluidity and heat storage effect are good. The heat storage capacity of supersaturated solutions of 41% and below is significantly reduced.
[0020] 3) The additional water method is used to solve the phase separation problem in 42% supersaturated sodium acetate, and the supercooling itself can ensure that the supersaturated sodium acetate solution can achieve low-temperature heat storage in winter. Due to the characteristic of electrified nucleation, the heat stored in the supersaturated sodium acetate solution can be released in a controllable manner at low temperatures.
[0021] 4) 42% supersaturated sodium acetate solution has good stability and can maintain the appearance and physical properties of the material unchanged after the cyclic melting and freezing experiment.
[0022] 5) Compared with the strong control group 20% NaCl solution, the 42% supersaturated sodium acetate solution has higher stirring power and wider power span in its three forms (supersaturated solution state, molten state, and crystalline state), and has better heating effect and wider working range.
[0023] 6) The phase change temperature of 42% supersaturated sodium acetate solution advances with the increase of stirring degree, which can better utilize the latent heat of phase change to store heat and effectively realize the integration of heat generation and heat storage of stirring working fluid.
[0024] The preparation process of 42% supersaturated sodium acetate solution is as follows:
[0025] Prepare the solution at a ratio of 42 g of anhydrous sodium acetate powder per 100 ml of solution, dissolve it by heating and stirring, and then transfer the solution to a container after cooling it to room temperature; if the volume of the solution decreases during cooling, add water to reach the required volume.
[0026] Furthermore, a temperature collector is installed in the mixing barrel to record the temperature in the mixing barrel; further, the temperature collector is installed at the upper or lower position or the upper, middle and lower position of the inner wall of the mixing barrel.
[0027] Furthermore, the liquid level of the thermogenic heat storage medium is no more than 60-75% of the height of the stirring barrel, and the liquid level is lower than the top of the spoiler.
[0028] Furthermore, the stirring component adopts a double-layer six-straight-blade disc rotor to improve the heating effect during the stirring process; the double-layer disc six-straight-blade form has a higher shaft torque than other rotor forms formed by a combination of upward-lifting blades, downward-pressing blades, and straight blades when stirring a supersaturated sodium acetate solid-liquid two-phase solution, and has a better heating effect.
[0029] Furthermore, the electrode control component includes a power supply and electrodes connected to the power supply circuit. The electrodes are arranged at the upper and lower positions or the upper, middle and lower positions of the inner wall of the stirring barrel, and the power supply voltage is between 1V and 1.8V.
[0030] Furthermore, the fan assembly adopts a vertical axis wind turbine, which is used to collect wind energy on the roof of the building and convert it into mechanical energy required by the stirring assembly.
[0031] Furthermore, the fan assembly and the stirring assembly are connected by a transmission member, and the transmission member adopts a KC roller chain coupling. A double-layer roller chain is used to be sleeved on the upper and lower transmission shafts to connect the shafts of the fan assembly and the stirring assembly to prevent the shaft from disengaging due to centrifugal force.
[0032] The beneficial effects of the present invention are as follows:
[0033] The stirring working fluid of the present invention adopts 42% supersaturated sodium acetate solution of inorganic phase change material, and its solid-liquid two-phase characteristics can enhance the heating effect. Experiments have confirmed that its stirring power and power span are both greater than those of a single salt solution, and its phase change temperature point of 58°C is very consistent with the household heating temperature. The heat storage capacity is much greater than that of a single salt solution, and its supercooling can achieve a certain degree of controllable temperature release and heat storage.
[0034] When the present invention uses 42% supersaturated sodium acetate solution as a stirring heating medium, the stirring rotor adopts a double-layer disc six-straight blade stirring rotor with large shear force to achieve the breakup and turbulence of the flow field vortex, thereby improving the heating effect; the spacing between the spoiler and the stirring rotor needs to be as small as possible to enhance the degree of breakage of the vortex of the working medium flow field in the barrel and enhance the heating effect.
[0035] The device can be used to realize the controllable heat storage and heat release while ensuring excellent heating effect, and the stirring wind energy heating storage equipment can be simple, convenient and integrated. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Figure 1 It is a schematic diagram of the device of the present invention;
[0037] Figure 2 This is a comparative analysis chart of the heat storage capacity of different working fluids;
[0038] Figure 3 The following are physical pictures of supersaturated sodium acetate solutions of different concentrations;
[0039] Figure 4 It is the stirring power diagram of different working fluids at three speeds;
[0040] Figure 5 It is the power span diagram of different working fluids at different speeds;
[0041] Figure 6 The temperature rise diagram of 42% supersaturated sodium acetate solution under different stirring degrees;
[0042] Figure 7 Schematic diagram of different types of rotors;
[0043] Figure 8 This is the stirring torque analysis diagram of different types of rotors;
[0044] Fig. 9 This is a controlled exothermic analysis diagram of a supersaturated sodium acetate solution;
[0045] In the figure: 1. vertical axis wind turbine; 2. mixing barrel; 3. insulation layer; 4. double-layer disc six straight blade mixing rotor; 5. spoiler; 6. 42% supersaturated sodium acetate solution; 7. temperature collector; 8. coupling; 9. electrode; 10. power supply. DETAILED DESCRIPTION
[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0047] like Figure 1 As shown, the stirring wind energy heat storage integrated system device of the present invention includes a fan component, a transmission component, a stirring component, a heat storage device, a spoiler, a heat storage medium and an electrode control component.
[0048] Among them, the fan component is a small vertical axis wind turbine 1 suitable for home heating and convenient for placement on the roof; the transmission part adopts a coupling 8; the stirring component is a double-layer disc six straight blade stirring rotor 4; the thermal heat storage device part is composed of an outer insulation layer 3 of a stirring barrel 2, and temperature sensors 7 are arranged on the upper and lower parts of the inner wall of the stirring barrel; the spoiler is composed of four groups of spoilers 5, and the spacing between the spoilers and the stirring rotor is controlled within 5mm; the thermal heat storage working fluid part adopts a 42% supersaturated sodium acetate solution 6 of a solid and liquid two-phase inorganic phase change material; the electrode control component is composed of four groups of electrodes 9 connected to a power supply and a group of power supplies 10 with a voltage range of 1V to 1.8V.
[0049] Specifically, the heat storage medium 6 uses a supersaturated sodium acetate solution. In terms of heat storage, the characteristics of the phase change material lead to a higher heat storage capacity than a single inorganic salt solution (such as a control group NaCl solution with a strong heat effect). Figure 2 As shown, the higher the concentration of supersaturated sodium acetate solution, the better the heat storage capacity. Figure 3 The higher the concentration of the supersaturated sodium acetate solution, the more crystals there are in the solution after crystallization, resulting in worse fluidity. The supersaturated sodium acetate solution with a concentration of 42% can better combine fluidity and heat storage capacity.
[0050] In terms of heat generation, the stirring power of 42% supersaturated sodium acetate solution in the supersaturated solution state, molten state, and crystal state is greater than that of the control group and water. Figure 4 As shown, it has the largest power span and the widest operating range, as Figure 5 At the same time, Figure 6 As shown, while maintaining the rotation speed at 300 rpm, three groups of magnetic rotors of different sizes (25 mm, 35 mm, and 45 mm) are selected for stirring to achieve the purpose of increasing the stirring degree; under different stirring conditions, the phase change heat storage of the 42% supersaturated sodium acetate solution will be advanced compared to that under the non-stirring condition, and will be advanced and increased as the stirring intensity increases, with better heat storage effect. Therefore, the present invention selects 42% supersaturated sodium acetate solution as the stirring heat storage medium 6.
[0051] like Figure 7 , 8As shown, based on the 42% supersaturated sodium acetate solution of solid and liquid phases as the heat storage medium, the stirring shaft torque of different rotor forms is simulated, and the double-layer disc six straight blade rotor I selected in the present invention has the largest shaft torque under the same conditions and the best stirring heating effect.
[0052] The specific implementation steps of this embodiment are as follows:
[0053] 1) The vertical axis wind turbine 1 installed on the roof is started under the action of wind energy, and the stirring shaft is driven to stir through the KC roller chain coupling 8, thereby driving the double-layer disc six straight blade rotor 4 to rotate.
[0054] 2) The stirring blades of the double-layer disc six straight blade stirring rotor 4 stir the heat storage medium 6 and generate friction and collision between the inner wall of the heat storage device and the spoiler 5. In addition, since the heat storage medium 6 is a solid and liquid phase, there is also friction and collision between the solid particles and the liquid to generate heat.
[0055] 3) Before 58°C, most of the heat generated by stirring is stored as sensible heat, and a small part is stored as latent heat. When the temperature reaches above 58°C, all the heat is stored as latent heat until the 42% supersaturated sodium acetate solution completely undergoes phase change, and then it is stored as sensible heat. Figure 6 , stirring will cause the latent heat of phase change of the heating medium to advance.
[0056] 4) The heat generated by stirring is stored in the heat storage device. When this part of the heat storage is needed, turn on the power supply 10 switch, pass a voltage of 1V to 1.8V into the four sets of electrodes 9, induce the 42% supersaturated sodium acetate solution molten state 6 to produce crystal nuclei for crystallization, thereby releasing a large amount of heat. Fig. 9 As shown, the controllability of the stored heat release is achieved.
[0057] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.
Claims
1. A controllable heat release stirring wind energy heat storage integrated system device, characterized in that: It includes a fan assembly, a stirring assembly, a thermal storage device, and an electrode control assembly; The wind turbine assembly is used to capture wind energy and convert it into mechanical energy; The fan assembly is in transmission connection with the stirring assembly, and provides shear force by driving the stirring assembly; The heat storage device is provided with a heat storage medium, and the heat storage device is used to stir the heat storage medium to generate heat and store heat; The electrode control assembly is arranged inside the thermal storage device and is used to promote the thermal storage medium to crystallize and release heat after power is turned on.
2. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The thermal storage device comprises a stirring barrel and a heat preservation layer arranged outside the stirring barrel.
3. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: It also includes a spoiler, which is arranged around the inside of the thermal storage device and has a gap between it and the stirring component to increase the turbulence degree and the stirring power.
4. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The heat storage working medium is 42% supersaturated sodium acetate solution; The preparation process of 42% supersaturated sodium acetate solution is as follows: Prepare the solution at a ratio of 42 g of anhydrous sodium acetate powder per 100 ml of solution, dissolve it by heating and stirring, and then transfer the solution to a container after cooling it to room temperature.
5. The controllable heat release stirring wind energy heat storage integrated system device according to claim 2, characterized in that: A temperature collector is installed in the mixing barrel to record the temperature in the mixing barrel.
6. The controllable heat release stirring wind energy heat storage integrated system device according to claim 3, characterized in that: The liquid level of the heat storage medium is 60%-75% of the height of the stirring barrel, and the liquid level is lower than the top of the spoiler.
7. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The stirring assembly adopts a double-layer six-straight blade disc rotor to improve the heating effect during the stirring process.
8. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The electrode control assembly comprises a power supply and electrodes connected to the power supply circuit, and the electrodes are arranged at the upper and lower positions or the upper, middle and lower positions of the inner wall of the stirring barrel.
9. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The fan assembly adopts a vertical axis wind turbine.
10. The controllable heat release stirring wind energy heat storage integrated system device according to claim 1, characterized in that: The fan assembly and the stirring assembly are connected by a transmission member.