Jet Cooling Control Device

Abstract

The present invention discloses a jet cooling control device. Through the cooperation of a mother board oscillator and a daughter board oscillator, oscillating jets with different frequencies and amplitudes can be generated without any mechanical motion device. Thus, appropriate oscillating control effects can be produced according to different cooling scenarios, the jet coverage area can be significantly broadened, and heat and mass transfer can be enhanced. Compared with traditional steady jets, the solution of the present invention can increase the cooling efficiency by more than three times. Compared with steady jets, in the solution of the present invention, the oscillating jets generated by the cooperation of the mother board oscillator and the daughter board oscillator can broaden the heat jet coverage area and effectively improve the heat and mass transfer performance and temperature diffusion effect of the heat jet.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment, and particularly to a jet cooling control device. Background Art

[0002] For off - shore wind farms or floating nuclear power plants at sea, a large amount of heat is generated during the power conversion process. This heat is usually directly cooled by seawater. The warm water after cooling is discharged into the sea, which will have a great impact on the velocity field and temperature field of the marine environment and directly affect the survival of marine organisms. In the prior art, the cooling water discharge usually uses a fixed nozzle, and the heat transfer and mass transfer performance and temperature diffusion effect of the steady - state thermal jet generated by it have limitations.

[0003] A scheme of oscillating jet is also proposed in the prior art. The jet oscillator is one of the methods to generate oscillating jets. The basic principle of generating oscillating jets is as follows: Inside the oscillator, due to the Coanda effect, the main jet entering through the inlet is adsorbed to the side wall on one side inside the oscillator, and then in the area near the outlet, a part of the main flow returns to the inlet through the feedback channel, pushing the main jet so that it is adsorbed to the side wall on the other side inside the oscillator. Thus, the jet ejected from the jet oscillator is a periodic oscillating jet. Based on the size, structure of the jet oscillator, as well as the properties and supply rate of the working medium, the oscillation frequency of the oscillating jet ranges from one hertz to thousands of hertz. However, in a traditional jet oscillator, when the internal structure of the oscillator is determined, the diffusion angle and oscillation frequency of the generated oscillating jet depend on the working medium supply rate and cannot be flexibly adjusted according to the application scenario. This characteristic limits the application of traditional jet oscillators.

[0004] Therefore, a scheme is needed to solve the limitations of the existing jet devices.

[0005] It should be noted that the information disclosed in the background art part of this application is only intended to deepen the understanding of the general background art of this application, and should not be regarded as an admission or an implication in any form that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a jet cooling control device to solve the limitations of the steady - state thermal jet scheme and the jet oscillator scheme in the prior art.

[0007] To solve the above technical problems, the present invention proposes a jet cooling control device, which includes a mother - board oscillator, a daughter - board oscillator, and a control channel;

[0008] The mother - board oscillator is provided with a first inlet, and the daughter - board oscillator is provided with a second inlet. Both the first inlet and the second inlet are used to receive high - temperature working medium from the hot jet pipeline;

[0009] The output end of the motherboard oscillator is communicated with one end of the control channel, and the other end of the control channel is communicated with the inside of the daughter board oscillator;

[0010] The output end of the daughter board oscillator is used as the output end of the jet cooling control device for cooling the oscillating jet.

[0011] Optionally, the jet cooling control device further includes a first flow controller;

[0012] The first flow controller is arranged at a position of the hot jet pipe close to the first inlet for adjusting the flow rate of the high-temperature working system flowing into the motherboard oscillator.

[0013] Optionally, the first flow controller is a first control valve.

[0014] Optionally, the jet cooling control device further includes a second flow controller;

[0015] The second flow controller is arranged at a position of the hot jet pipe close to the second inlet for adjusting the flow rate of the high-temperature working system flowing into the daughter board oscillator.

[0016] Optionally, the second flow controller is a second control valve.

[0017] Optionally, the oscillation jet diffusion angle and the oscillation frequency are adjusted by adjusting the flow rate ratio of the high-temperature working medium flowing into the first inlet and the second inlet.

[0018] Optionally, the motherboard oscillator is a jet oscillator.

[0019] Optionally, the inside of the daughter board oscillator includes a jet channel for steady jets.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The jet cooling control device proposed by the present invention, through the cooperation of the motherboard oscillator and the daughter board oscillator, can generate oscillating jets with different frequencies and amplitudes without any mechanical movement device. Thus, appropriate oscillation control effects can be generated according to different cooling occasions, the jet coverage area can be significantly broadened, and heat transfer and mass transfer can be strengthened. Compared with the traditional steady jet, the solution of the present invention can increase the cooling efficiency by more than 3 times. Compared with the steady jet, the oscillating jet generated by the cooperation of the motherboard oscillator and the daughter board oscillator in the solution of the present invention can broaden the hot jet coverage area, effectively improve the heat transfer and mass transfer performance and the temperature diffusion effect of the hot jet.

[0022] 2. Compared with traditional jet oscillators, in the solution of the present invention, the cooperation between the mother board oscillator and the daughter board oscillator can achieve independent adjustment of the oscillation jet diffusion angle and oscillation frequency, which is more conducive to realizing the flow control of the thermal jet under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the oscillator in the jet cooling control device proposed in the embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the jet cooling control device proposed in the embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the time-averaged temperature field of a steady thermal jet under the same Reynolds number and the same hydraulic diameter;

[0026] Figure 4 It is a schematic diagram of the time-averaged temperature field of an oscillating thermal jet under the same Reynolds number and the same hydraulic diameter;

[0027] Figure 5 It is a curve graph of the flow direction decay rate indexes of a steady jet, an oscillating jet, and a pulsating jet;

[0028] Figure 6 It is a curve graph of the lateral diffusion rate indexes of a steady jet, an oscillating jet, and a pulsating jet;

[0029] Figure 7 It is a curve graph of the mixing rate indexes of a steady jet, an oscillating jet, and a pulsating jet;

[0030] Among them, 100 - mother board oscillator, 200 - daughter board oscillator, 300 - control channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe the specific embodiments of the present invention in more detail with reference to the schematic diagrams. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] Please refer to Figures 1 to 7 , the present invention provides a jet cooling control device, including a motherboard oscillator 100, a daughterboard oscillator 200, and a control channel 300;

[0035] The motherboard oscillator 100 is provided with a first inlet, and the daughterboard oscillator 200 is provided with a second inlet. Both the first inlet and the second inlet are used to receive high-temperature working medium from a hot jet pipeline;

[0036] The output end of the motherboard oscillator 100 is communicated with one end of the control channel 300, and the other end of the control channel 300 is communicated with the inside of the daughterboard oscillator 200;

[0037] The output end of the daughterboard oscillator 200 serves as the output end of the jet cooling control device and is used for cooling the oscillating jet.

[0038] Different from the prior art, the jet cooling control device proposed by the present invention can generate oscillating jets with different frequencies and amplitudes without any mechanical motion device through the cooperation of the motherboard oscillator 100 and the daughterboard oscillator 200. Thus, appropriate oscillating control effects can be generated according to different cooling occasions, the jet coverage area can be significantly broadened, and heat transfer and mass transfer can be enhanced. Compared with the traditional steady jet, the solution of the present invention can increase the cooling efficiency by more than 3 times. Compared with the steady jet, the oscillating jet generated by the cooperation of the motherboard oscillator 100 and the daughterboard oscillator 200 in the solution of the present invention can broaden the hot jet coverage area and effectively improve the heat transfer and mass transfer performance and temperature diffusion effect of the hot jet.

[0039] This patent proposes a jet cooling control device that can generate oscillating jets with different frequencies and amplitudes without any mechanical motion device. Thus, appropriate oscillating control effects can be generated according to different cooling occasions, the jet coverage area can be significantly broadened, and heat transfer and mass transfer can be enhanced.

[0040] Compared with the traditional steady jet, a jet cooling control device proposed by this patent can increase the cooling efficiency by more than 3 times. The time-averaged temperature fields of the steady hot jet and the oscillating hot jet under the same Reynolds number and the same hydraulic diameter are respectively as Figure 3 , Figure 4The jet attenuation rate, jet diffusion rate, and jet mixing rate curves of steady jet, oscillating jet, and pulsating jet are shown in Figure 5 , Figure 6 , Figure 7 As shown in the figure, all three indicators show that the temperature dilution performance of the oscillating jet is significantly better than that of the steady jet.

[0041] The jet oscillator is one of the methods to generate an oscillating jet. The basic principle of generating an oscillating jet is as follows: inside the oscillator, due to the Coanda effect, the main jet entering through the inlet is adsorbed onto the side wall on one side of the oscillator. Then, in the area near the outlet, a part of the mainstream returns to the inlet through the feedback channel, pushing the main jet so that it is adsorbed onto the side wall on the other side of the oscillator. As a result, what is ejected from the jet oscillator is a periodic oscillating jet. Based on the size, structure, working fluid properties and supply rate of the jet oscillator, the oscillation frequency of the oscillating jet ranges from one hertz to thousands of hertz. However, in a traditional jet oscillator, when the internal structure of the oscillator is determined, the diffusion angle and oscillation frequency of the generated oscillating jet depend on the working fluid supply rate and cannot be flexibly adjusted according to the application scenario. This feature limits the application of traditional jet oscillators.

[0042] The present invention relates to a hot jet control device based on a jet oscillator, such as Figure 1 As shown, the jet oscillator is a new type of mother-and-child jet oscillator. The mother-and-child jet oscillator used in the present invention adopts a layered structure. The structure of the interior of the mother plate is similar to that of a traditional jet oscillator, and the interior of the child plate is similar to the injection channel of a steady jet. The mother plate and the child plate are each provided with separate inlets. The high-temperature working fluid flows into the oscillator from the mother plate inlet and the child plate inlet respectively, and after merging inside the child plate through the control channel 300, flows out of the oscillator through the child plate outlet, thereby generating an oscillating hot jet. By changing the ratio of the working fluid flow rate at the mother plate inlet to the working fluid flow rate at the child plate inlet, the diffusion angle and oscillation frequency of the oscillating hot jet can be adjusted, thereby achieving the flow control of the hot jet. Compared with the prior art, the present invention has the characteristics of not requiring any mechanical moving parts, strong adaptability, safety and reliability, and independent adjustment of the hot jet diffusion angle and oscillation frequency. Figure 2 As shown, by adjusting the distribution between the motherboard inlet and the daughterboard inlet while keeping the total working fluid supply rate unchanged, oscillating jets with different diffusion angles and oscillation frequencies can be obtained, thereby eliminating the dependence of the diffusion angle and the oscillation frequency on the total working fluid supply rate and achieving decoupling of their relationship, which is more conducive to realizing the flow control of the hot jet under various working conditions.

[0043] Optionally, the jet cooling control device further comprises a first flow control device;

[0044] The first flow control device is arranged at a position of the hot jet pipe close to the first inlet for adjusting the flow rate of the high-temperature working mode flowing into the motherboard oscillator 100.

[0045] Optionally, the first flow control device is a first control valve.

[0046] Optionally, the jet cooling control device further includes a second flow control device;

[0047] The second flow control device is arranged at a position of the hot jet pipe close to the second inlet for adjusting the flow rate of the high-temperature working mode flowing into the daughter board oscillator 200.

[0048] Optionally, the second flow control device is a second control valve.

[0049] Optionally, the oscillation jet diffusion angle and the oscillation frequency are adjusted by adjusting the flow rate ratio of the high-temperature working medium flowing into the first inlet and the second inlet.

[0050] Optionally, the motherboard oscillator 100 is a jet oscillator.

[0051] Optionally, the interior of the daughter board oscillator 200 includes a jet channel for steady jet.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The jet cooling control device proposed by the present invention, through the cooperation of the motherboard oscillator and the daughter board oscillator, can generate oscillation jets with different frequencies and amplitudes without any mechanical motion device. Thus, appropriate oscillation control effects can be generated according to different cooling occasions, the jet coverage area can be significantly broadened, and heat transfer and mass transfer can be strengthened. Compared with the traditional steady jet, the solution of the present invention can increase the cooling efficiency by more than 3 times. Compared with the steady jet, the oscillation jet generated by the cooperation of the motherboard oscillator and the daughter board oscillator in the solution of the present invention can broaden the hot jet coverage area, effectively improve the heat transfer and mass transfer performance and the temperature diffusion effect of the hot jet.

[0054] 2. Compared with the traditional jet oscillator, the cooperation of the motherboard oscillator and the daughter board oscillator in the solution of the present invention can realize the independent adjustment of the oscillation jet diffusion angle and the oscillation frequency, which is more conducive to realizing the flow control of the hot jet under various working conditions.

[0055] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example" or "specific example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0056] The above are only the preferred embodiments of the present invention and do not impose any limitation on the present invention. Any person skilled in the art, within the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification and other changes to the technical solution and technical content disclosed in the present invention, which are all within the content of the technical solution of the present invention and still belong to the protection scope of the present invention.

Claims

1. A jet cooling control device, characterized in that, It includes a motherboard oscillator, a daughterboard oscillator, and a control channel; The motherboard oscillator is provided with a first inlet, and the daughterboard oscillator is provided with a second inlet. Both the first inlet and the second inlet are used to receive high-temperature working medium from a hot jet pipeline; The output end of the motherboard oscillator is communicated with one end of the control channel, and the other end of the control channel is communicated with the inside of the daughterboard oscillator; The output end of the daughterboard oscillator serves as the output end of the jet cooling control device for cooling the oscillating jet.

2. The jet cooling control device according to claim 1, wherein, The jet cooling control device further includes a first flow control device; The first flow control device is arranged at a position of the hot jet pipeline close to the first inlet for adjusting the flow rate of the high-temperature working medium flowing into the motherboard oscillator.

3. The jet cooling control device according to claim 2, characterized in that, The first flow control device is a first control valve.

4. The jet cooling control device according to claim 1, wherein, The jet cooling control device further includes a second flow control device; The second flow control device is arranged at a position of the hot jet pipeline close to the second inlet for adjusting the flow rate of the high-temperature working medium flowing into the daughterboard oscillator.

5. The jet cooling control device according to claim 4, characterized in that, The second flow control device is a second control valve.

6. The jet cooling control device according to claim 1, wherein The adjustment of the diffusion angle and oscillation frequency of the oscillating jet is achieved by adjusting the flow rate ratio of the high-temperature working medium flowing into the first inlet and the second inlet.

7. The jet cooling control device according to claim 1, characterized in that, The motherboard oscillator is a jet oscillator.

8. The jet cooling control device according to claim 1, wherein, The inside of the daughterboard oscillator includes a jet channel for steady jet.

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