[0034] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings, and the described embodiments are the embodiments of the present invention, not all of the embodiments; All other embodiments obtained without making creative labor are the scope of the invention.
[0035] In this paper, the phenomenon of the phase change material is melted in the presence of a solid phase region of the fixed phase, and the three-dimensional cube heat storage unit of 60 mm * 120 mm * 100 mm is taken as an example. Simulation results figure 2 , image 3 exhibit. figure 2 Melting process diagram of a phase change material that is difficult to melt in a solid phase region that is difficult to melt in the energy storage unit. image 3 A schematic diagram of the change of liquid phase percentage over time in numerical simulation of the melting of the lower phase change material. When the melting process has not yet started, the phase change material in the energy storage unit is solid, the percentage of liquid phase is 0; after the melting process begins, when the liquid phase reaches 98%, the phase change material is accomplished. Among them, the melting process is divided into two stages, and the first stage is a phase change material melting process liquid phase percentage from 0 to 72.7%, and the second stage is a phase change material melting process liquid phase percentage from 72.7% to 98%. Depend on image 3 It can be seen that the first phase of the phase change material that is not molved in the energy storage unit in the energy storage unit, the first stage of the total melting material is 50%, the melting efficiency is high; the second stage accounts for a total melting time. 50%. Depend on figure 2 It can be seen that when the phase change material melting process is in the second stage, the main body portion within the energy storage unit has been melted, and only 28% of the phase change material is stored in the lower end of the cooling surface and the bottom of the closure housing to melt, but occupied The total melting of 50% is greatly reduced by total melting efficiency. Depend on image 3 It can be seen that after the solid phase region (8) which is difficult to melt in the energy storage unit, the total melting time is reduced from 5000s to 3900s, and the energy returning efficiency of the energy storage unit can be effectively increased by 28%.
[0036] Figure 4 Schematic diagram of a solid phase region that is difficult to melt in a cube phase change storage unit. Taking the three-dimensional cube heat storage unit of 60 mm * 120 mm * 100 mm as an example, it is about 40 mm * 40mm, 40mm * 40mm, 40mm * 40mm, is 40mm * 40mm, is 40mm * 40mm in the bottom of the cooling surface and the closure housing under the lower end of the cooling surface. Trimpillar of 100 mm.
[0037] figure 1 A structural schematic structural diagram of a phase change storage enhancement device provided by the built-in ultrasonic generator provided by the present invention, the phase change storage enhancement device can be divided into ultrasonic generating modules and phase transition energy storage modules.
[0038] The ultrasonic generating module includes a built-in ultrasonic vibrator unit (1), an external wireless charging emitter (10), and an external power source (6). Figure 5 A schematic diagram of the internal structure of the built-in ultrasonic vibrator unit. Among them, the built-in ultrasonic vibrator unit (1) consists of a temperature-temperature switch (11), a wireless charging receiver (13), and the ultrasonic generator (12), the structure is not limited to figure 1 The structure shown, but must be an organic composition of the above three. The built-in ultrasonic vibrator unit (1) includes uniformly disposed in an intermediate of a porous material (9) in the interior of the porous material (9) and a solid phase region (8) disposed in the energy storage unit in the energy storage unit. The built-in ultrasonic vibrator unit (1b) in the B-region of the porous material (9) in the inner region.
[0039] The phase change storage module includes a closed housing (7), a heating surface (4), a phase change material (3), and a porous material (9). Wherein, the closure housing (7) has at least one heating surface (4) and a cooling surface (5); the porous material (9) is filled in an internal space of the closed housing (7); the phase change material (3) Uniformly fill inside the porous material (9) to form a composite material.
[0040] In this apparatus, the enhanced heat exchange is ultrasonic wave emitted by an ultrasonic wave generated by an ultrasonic vibrator unit in group A to enhance the interior disturbance of the phase change material (3), and an interposed ultrasonic vibrator unit (1A) ) And the built-in ultrasonic vibrator unit (1b) in group B is disposed inside the porous material (9), directly contacting the phase change material (3), realizing the zero loss before the incoming phase change material (3), improves ultrasonic utilization And energy storage efficiency. It should be noted that the built-in ultrasonic vibrator unit (1a) is concentrated in group A, which acts on the integral heat transfer mass of phase transition storage material, and the built-in ultrasonic vibrator unit (1b) acts on the solid phase in which it is difficult to melt in the energy storage unit. Region (8) heat transfer mass.
[0041] Based on the above phase change storage heat reinforcement device, the present invention also provides a phase transition heat exchanger operating control logic.
[0042] The system is operating in the heat storage. When heat is hot, the heat flow flows into the energy storage unit (4) into the energy storage unit, and the unmelted phase change material (3b) is solid, and the phase change occurs at the heating of the heat flow, which becomes a liquid storage latent heat.
[0043] In the case where the piezoelectric ceramic sheet is not turned on, there is a slower than that of the phase change heat storage system is slow, the phase change is uneven, the lower end of the cooling surface and the bottom heat transfer of the closed housing is weak. We have shown that without ultrasonic enhancement, due to the influence of natural convection, the temperature distribution is uneven, the upper solid-liquid phase interface of the energy storage system is significantly advanced to the lower part, resulting in poor energy utilization of the energy storage system. Based on this, the present invention proposes to enhance the ultrasonic vibrator unit internal storage unit to perform ultrasonic enhancement.
[0044] The phase change storage heat reinforcing operation control logic is that ultrasonic waves have strong heat transfer enhancement effects for liquid phase change materials. In the initial state, the unmelted phase change material (3b) in the closed housing (7) is low, and the entire energy storage device is solid. When the heating surface (4) is thermally flowing, the phase change material (11) of the heating surface (4) begins to melt, the temperature temperature switch (11) on the ultrasonic generator near the heating surface is temperature to reach the phase change temperature, the ultrasonic wave The generator (12) is already in the liquid phase region, so the temperature-temperature switch (11) controls the ultrasonic generator (12); in this type, with the expansion of the liquid phase region, the ultrasonic enhancer of the liquid phase region (12) ) Open, which is opened under the control of the temperature temperature switch (11) until the energy storage unit is all liquid, and the heat storage process is completed.
[0045] It should be noted that the above "high temperature", "low temperature" is merely the expression of relative, and there is no clear temperature range, and the actual fluid temperature is determined according to the actual conditions.
[0046] The present invention does not describe the automatic control circuit.
[0047] The embodiment of the present invention is only an exemplary description of this patent, and does not limit its protection range, and those skilled in the art can also change its localization, as long as it is not exceeded in this patent, it is within the protection of this patent. .
