Cooling device for radiator

Abstract

The utility model discloses a cooling device for a radiator, which comprises a radiator and a cooling device, and the cooling device comprises a water supply pipe, a water supply tank, a water supply pump, a water collecting pipe, a high-pressure atomizing nozzle and a water collecting tank, the water supply tank is located on one side of the radiator, water is conveyed to all positions of the water supply pipes from the water supply tank through the water supply pump, the water supply pipes are distributed on the two sides of the radiator in a forked mode, high-pressure atomizing nozzles are arranged on the wall faces of the water supply pipes on the two sides of the radiator respectively, and water is sprayed to the surface of the radiator from the high-pressure atomizing nozzles. Water flows down along the surface of the radiator and drips into the water collecting tank at the lower end through the filter screen, the water collecting tank is connected with the water supply tank through a water collecting pipe and flows back into the water supply tank again, and water circulation is formed; the temperature of forced convection air is reduced through the high-pressure atomization nozzle, the temperature difference between the forced convection air and the high-pressure atomization nozzle is increased, meanwhile, liquid water vapor takes away a large amount of heat through the sensible heat and gasification latent heat process, and safe and stable operation of an electric power system and power generation equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radiators and related heat dissipation technologies of SVG dynamic reactive power compensation devices in power plants, and specifically relates to a temperature reduction device for radiators. Background Art

[0002] With the arrival of high-temperature weather, the heat exchange pressure of the outdoor radiator of the reactive power compensation device increases under high output conditions, and the cooling effect of the cooling water is not obvious, resulting in the cooling water temperature at the water inlet of the SVG room reaching the set value, causing the cooling device to trip frequently, and thus causing the SVG dynamic reactive power compensation device in the booster station to trip. After the SVG dynamic reactive power compensation device in the booster station trips, it is impossible to effectively regulate the voltage at the power plant grid connection point. Especially when the grid voltage is unstable, the power plant must provide capacitive or inductive reactive power through the SVG dynamic reactive power compensation device to assist in regulating the grid voltage. If the SVG dynamic reactive power compensation device does not have reactive power compensation ability at this time, when the grid voltage is too low or too high, it may cause the power plant to trip off the grid, increasing the probability of large-area grid disconnection accidents of power generation equipment and affecting the safe and stable operation of the power system and power generation equipment.

[0003] The existing radiator of the SVG dynamic reactive power compensation device is of the finned tube heat exchanger type. The surface of the copper pipe is covered with finned metal sheets. These fins can effectively increase the heat exchange area of the copper pipe and improve the heat exchange capacity. The air in the environment and the fluid in the pipe are forced to convect and exchange heat under the suction of the fan. The air in the environment passes through between the fins and the copper pipe, and these two fluids do not come into direct contact. Since the temperature of the cooling water in the pipe is much higher than the temperature of the external air fluid, under the action of the temperature difference, the heat of the cooling water in the pipe will be transferred to the ambient air through the copper pipe wall and the fins. The fins increase the contact area with the air, making the heat exchange between the air and the cooling water in the copper pipe more efficient. When the external temperature is too high, the temperature difference between the air fluid in the environment and the fluid in the copper pipe is too small, and less heat is transferred, resulting in an unobvious heat dissipation effect.

[0004] Therefore, it is crucial to develop a device that can quickly cool the radiator in high-temperature weather to avoid the occurrence of tripping events of the SVG dynamic reactive power compensation device. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model discloses a temperature reduction device for radiators to solve the problem that the heat dissipation effect of the radiator is not obvious due to high-temperature weather and high output conditions.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for a radiator, comprising a radiator and a cooling device, wherein the cooling device comprises a water supply pipe, a water supply tank, a water supply pump, a water collecting pipe, a high-pressure atomizing nozzle and a water collecting tank; the water supply tank is located on one side of the radiator, and one end of the water supply pipe is connected to a water supply pump provided inside the water supply tank, water is transmitted from the water supply tank to various places of the water supply pipe via the water supply pump, and the water supply pipe is distributed in a bifurcated manner on both sides of the radiator, and high-pressure atomizing nozzles are respectively provided on the wall surfaces of the water supply pipes on both sides of the radiator, and water is sprayed from the high-pressure atomizing nozzle to the surface of the radiator under the pressure of the water supply pump;

[0007] The water collecting tank is located at the lower end of the radiator. Liquid water vaporizes and evaporates, taking away part of the heat. Under the action of gravity, the water flows down along the surface of the radiator, passes through the filter screen and drips into the water collecting tank. The water collecting tank is connected to the water supply tank through a water collecting pipe, and flows back into the water supply tank, thereby forming a water cycle.

[0008] Preferably, a magnetic temperature sensor is provided at the water inlet pipe of the radiator, and the magnetic temperature sensor is closely attached to the water inlet pipe of the radiator.

[0009] Preferably, when the water inlet temperature reaches 40° C., the temperature at the water inlet pipe is received by the temperature sensor, and the signal is transmitted to the temperature control switch cabinet provided on one side, thereby starting the water supply pump.

[0010] Preferably, a precision filter is provided between the water collecting tank and the water collecting pipe, and the water flowing into the water collecting tank is filtered by the precision filter and flows back into the water supply tank.

[0011] Preferably, a filter is also provided at the water inlet of the water supply pump, and the water after triple filtration ensures that the high-pressure atomizing nozzle continues to work.

[0012] Preferably, the water supply pipes are distributed at the upper edge of the radiator.

[0013] Preferably, the water supply tank is buried underground so that heat is transferred between the water supply tank and the ground to reduce the temperature of the water in the water supply tank.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In this utility model, the temperature of the outlet pipe of the radiator is monitored in real time through a temperature control system, and atomized liquid water vapor is sprayed through a high-pressure atomizing nozzle to cover the surface of the radiator, reducing the temperature of the forced convection air, increasing the temperature difference between the two, and increasing heat transfer. At the same time, the liquid water vapor also takes away a large amount of heat through the sensible heat and latent heat of vaporization processes, further enhancing the heat dissipation effect, and finally achieving the effect of rapidly reducing the temperature of the coolant.

[0016] 2. According to the principle of forced convection heat transfer of the radiator, this utility model enhances the heat transfer effect by reducing the temperature of the incoming air and increasing the humidity. At the same time, using the principles of sensible heat and latent heat of vaporization of water, it further reduces the temperature of the heat exchanger surface, improves the heat transfer effect for the second time, effectively avoids the risk of tripping of the SVG dynamic reactive power compensation device in the power plant, reduces the probability of large-area disconnection accidents of power generation equipment, and improves the safe and stable operation of the power system and power generation equipment.

[0017] 3. In this utility model, the liquid water sprayed by the high-pressure atomizing nozzle plays a cleaning role on the finned heat exchanger, and thus can extend the service life of the SVG radiator fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0019] In the drawings:

[0020] Figure 1 is a schematic diagram of the working principle of the SVG outdoor radiator device of the present utility model;

[0021] Figure 2 is a spraying schematic diagram of the cooling device of the present utility model;

[0022] Figure 3 is a schematic diagram of the working principle of the cooling device of the present utility model;

[0023] Figure 4 is a schematic diagram of the structure of the cooling device of the present utility model;

[0024] Figure 5 is a schematic diagram of the installation structure of the cooling device of the present utility model;

[0025] Reference numerals in the figures: 1, magnetic adsorption temperature sensor; 2, temperature control switch cabinet; 3, water supply pipe; 4, water supply tank; 5, water supply pump; 6, collecting pipe; 7, precision filter; 8, high-pressure atomizing nozzle; 9, collecting tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example: Figures 1-5 As shown, a cooling device for a radiator includes a radiator and a cooling device, wherein the cooling device includes a water supply pipe 3, a water supply tank 4, a water supply pump 5, a water collecting pipe 6, a high-pressure atomizing nozzle 8 and a water collecting tank 9; the water supply tank 4 is located on one side of the radiator, and the water supply tank 4 is buried underground, so that heat is transferred between the water supply tank 4 and the earth to reduce the temperature of the water in the water supply tank 4, and one end of the water supply pipe 3 is connected to the water supply pump 5 provided inside the water supply tank 4, and a filter is also provided at the water inlet of the water supply pump 5. The water after triple filtration ensures that the high-pressure atomizing nozzle 8 continues to work, and the water is transmitted from the water supply tank 4 to various places of the water supply pipe 3 via the water supply pump 5, and the water supply pipe 3 is distributed in a forked manner at the upper edge of the radiator. , and the walls of the water supply pipes 3 on both sides of the radiator are respectively provided with high-pressure atomizing nozzles 8. Under the pressure of the water supply pump 5, water is sprayed from the high-pressure atomizing nozzles 8 to the surface of the radiator; the water collecting tank 9 is located at the lower end of the radiator, and the liquid water vaporizes and evaporates to take away part of the heat. The water flows down along the surface of the radiator under the action of gravity, is filtered through the filter net, and drips into the water collecting tank 9, and then is filtered for the second time through the precision filter 7 under the action of gravity potential difference. The filtered water flows through the water collecting pipe 6 provided between the water collecting tank 9 and the water supply tank 4, and finally flows back into the water supply tank 4 on one side, thereby forming a water cycle, and a filter is provided at the water inlet of the water supply pump 5 for the third filtration to ensure the continuous operation of the high-pressure atomizing nozzle 8.

[0028] The present application also includes a temperature control system based on the ST89C51 chip. When the temperature reaches the set value, the temperature control switch cabinet 2 starts the water supply pump 5. The temperature sensor probe takes into account the actual situation of the SVG's water inlet pipe and determines to use a magnetic temperature sensor 1. The placement position takes into account the influence of outdoor direct sunlight, which will shorten the service life of the probe, and determines to be placed at the SVG indoor water inlet pipe. The SVG room has air conditioning and refrigeration, which will have a certain impact on the measurement of the water inlet pipe temperature. After actual measurement and comparison, the water inlet pipe temperature setting value is set to 40°C to start the water pump; the magnetic temperature sensor 1 is close to the water inlet pipe of the radiator of the SVG dynamic reactive power compensation device. When the water inlet temperature reaches 40°C, the temperature at the water inlet pipe is received by the magnetic temperature sensor 1, and the signal is transmitted to the temperature control switch cabinet 2 on one side, thereby starting the water supply pump 5.

[0029] This application takes the radiator of the SVG dynamic reactive power compensation device of a certain wind farm as an example, that is, a fin-tube heat exchanger is selected, and the surface of the copper pipe is covered with fin-like metal sheets, which is 3240mm long, 1100mm wide and 1750mm high. There are eight fin heat exchange plates, four in the front and four in the back, and the area of ​​each plate is 600mm×1100mm.

[0030] Among them, in order to achieve one nozzle covering two fin-type heat exchange surfaces, the present application requires that the spray coverage area of ​​the high-pressure nozzle be 1200mm×1100mm, and an upward spray type high-pressure atomizing nozzle 8 with an aperture of 0.6mm is selected, the nozzle angle is 80°, and the water spray coverage range is approximately 1.2㎡. The spray volume of one high-pressure atomizing nozzle 8 is 135-200cc / min.

[0031] Among them, the model selected for the water supply pump 5 is a 12V100W booster submersible pump, the pump head h2-h1 is 1.2m, the outlet pressure P1 is 0.8MPa, and the flow rate q1 is 32-48L / h.

[0032] The water supply pipe 3 and the water collecting pipe 6 are soft rubber pipes with a diameter of 20 mm and a material of polyvinyl chloride.

[0033] In actual use, when the external environment temperature is too high and the SVG dynamic reactive power compensation device is in high output condition, the cooling effect of the finned heat exchanger is not obvious, causing the temperature of the water outlet pipe of the finned heat exchanger to be higher than 40°C. At this time, the temperature control switch cabinet 2 in the utility model receives the electrical signal of the magnetic temperature sensor 1, starts the water supply pump 5, and then the high-pressure atomizing nozzle 8 sprays atomized liquid water vapor to cover the surface of the finned heat exchanger, thereby reducing the temperature of the forced convection air, increasing the temperature difference between the two, and increasing the heat transfer. At the same time, the liquid water vapor also takes away a large amount of heat through the sensible heat and latent heat of vaporization process, further enhancing the heat dissipation effect. At the same time, the liquid water can also clean the finned heat exchanger, ultimately achieving the effect of rapidly reducing the temperature of the coolant, while extending the service life of the indoor SVG dynamic reactive power compensation device radiator fan.

[0034] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A cooling device for a radiator, characterized in that: It comprises a radiator and a cooling device, wherein the cooling device comprises a water supply pipe, a water supply tank, a water supply pump, a water collecting pipe, a high-pressure atomizing nozzle and a water collecting tank; the water supply tank is located on one side of the radiator, and one end of the water supply pipe is connected to a water supply pump provided inside the water supply tank, water is transmitted from the water supply tank to various places of the water supply pipe via the water supply pump, and the water supply pipe is distributed in a bifurcated manner on both sides of the radiator, and high-pressure atomizing nozzles are respectively provided on the walls of the water supply pipes on both sides of the radiator, and water is sprayed from the high-pressure atomizing nozzles onto the surface of the radiator under the pressure of the water supply pump; The water collecting tank is located at the lower end of the radiator. Liquid water vaporizes and evaporates, taking away part of the heat. Under the action of gravity, the water flows down along the surface of the radiator, passes through the filter screen and drips into the water collecting tank. The water collecting tank is connected to the water supply tank through a water collecting pipe, and flows back into the water supply tank, thereby forming a water cycle.

2. A cooling device for a radiator according to claim 1, characterized in that: A temperature sensor is arranged at the water inlet pipe of the radiator.

3. A cooling device for a radiator according to claim 2, characterized in that: The temperature at the water inlet pipe is received by the temperature sensor, and a signal is transmitted to a temperature control switch cabinet provided on one side, thereby starting the water supply pump.

4. A cooling device for a radiator according to claim 1, characterized in that: A precision filter is provided between the water collecting tank and the water collecting pipe. The water flowing into the water collecting tank is filtered by the precision filter and flows back into the water supply tank.

5. The cooling device for a radiator according to claim 1, characterized in that: A filter is also provided at the water inlet of the water supply pump, and the water after triple filtration ensures that the high-pressure atomizing nozzle continues to work.

6. A cooling device for a radiator according to claim 1, characterized in that: The water supply pipes are distributed at the upper edge of the radiator.

7. The cooling device for a radiator according to claim 1, characterized in that: The water supply tank is buried underground, so that heat is transferred between the water supply tank and the ground to reduce the temperature of the water in the water supply tank.

Images