Patent Application
20240190534
This application claims priority to Chinese Patent Application No. 202110195731.6 filed with the China National Intellectual Property Administration (CNIPA) on Feb. 19, 2021, the disclosure of which is incorporated herein by reference in its entirety.
The present application relates to the technical field of air layer drag reduction ships, for example, an air supply system applicable to an air layer drag reduction ship and a ship.
An air layer drag reduction system of a ship includes subsystems, such as air supply, pressure stabilization, air injection, control. An air supply system uses multiple air compressors for air supply. When the number of air compressors is relatively large, the multiple air compressors interfere with each other, complex pipeline structures affect each other, and a pipeline connection has a relatively great loss, resulting in the unstable output of the air supply system and an unstable gas in a pipeline. Meanwhile, a conventional low-pressure air compressor, such as an oil-free screw air compressor, discharges a gas with a relatively high temperature which can reach more than 100° C. or even 200° C. When a high-temperature gas runs in the pipeline, damage or danger is caused.
The present application provides an air supply system applicable to an air layer drag reduction ship and a ship to connect air compressors, stabilize output air, and reduce the temperature of the output air, thereby improving the applicability and stability of the air supply system.
An air supply system applicable to an air layer drag reduction ship is provided. The air supply system includes an air tank and a cooling assembly.
The air tank is provided with an air outlet pipeline and multiple air inlet pipelines, where the air outlet pipeline and the multiple air inlet pipelines are each provided with a first monitoring assembly and a first remote control valve, the first monitoring assembly is configured to monitor a temperature, pressure, and a flow of air in the air outlet pipeline or one of the multiple air inlet pipelines corresponding to the first monitoring assembly, and the first remote control valve is configured to control an air flow through the air outlet pipeline or one of the multiple air inlet pipelines corresponding to the first remote control valve.
The cooling assembly is disposed inside the air tank and configured to reduce a temperature of air in the air tank; where the cooling assembly includes a liquid inlet pipe and a liquid outlet pipe, the liquid outlet pipe is provided with a second monitoring assembly, the second monitoring assembly is configured to monitor a temperature and a flow of a fluid in the liquid outlet pipe, the liquid inlet pipe is provided with a second remote control valve, the second monitoring assembly and the first monitoring assembly are communicatively connected to the second remote control valve, and the second remote control valve is configured to control a liquid flow through the liquid inlet pipe according to monitoring results of the second monitoring assembly and the first monitoring assembly.
A ship including the preceding air supply system is further provided.
Hereinafter technical solutions in embodiments of the present application are described in conjunction with the drawings in the embodiments of the present application. Generally, components of embodiments of the present application described and illustrated in the drawings may be arranged and designed through various configurations.
Similar reference numerals and letters indicate similar items in the drawings. Therefore, once an item is defined in one drawing, the item no longer needs to be defined and explained in subsequent drawings.
In the description of the present application, orientations or position relations indicated by terms such as “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “in”, and “out” are based on the drawings or those of the product of the present application usually placed during use. These orientations or position relations are intended only to facilitate and simplify the description of the present application and not to indicate or imply that a device or element referred to must have such particular orientations or must be configured or operated in such particular orientations. Thus, these orientations or position relations are not to be construed as limiting the present application. Moreover, terms such as “first”, “second”, and “third” are used only for distinguishing description and are not to be construed as indicating or implying relative importance. In the description of the present application, unless otherwise noted, the term “a plurality of” or “multiple” means two or more.
In the description of the present application, terms “disposed” and “connected” are to be understood in a broad sense unless otherwise specified and limited. For example, the term “connected” may refer to “securely connected”, “detachably connected”, or “integrally connected” or may refer to “mechanically connected” or “electrically connected”. Meanings of the preceding terms in the present application may be understood based on specific situations.
In the present application, unless otherwise specified and limited, when a first feature is described as “on” or “under” a second feature, the first feature and the second feature may be in direct contact or be in contact via another feature between the two features instead of being in direct contact. Moreover, when the first feature is described as “on”, “above”, or “over” the second feature, the first feature is right on, above, or over the second feature, the first feature is obliquely on, above, or over the second feature, or the first feature is simply at a higher level than the second feature. When the first feature is described as “under”, “below”, or “underneath” the second feature, the first feature is right under, below, or underneath the second feature, the first feature is obliquely under, below, or underneath the second feature, or the first feature is simply at a lower level than the second feature.
The embodiments of the present application are described below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.
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In an embodiment, multiple air outlet pipelines 12 may be provided.
The air supply system may also include multiple air compressors 3 corresponding to the multiple air inlet pipelines 11 one to one, where an end of the air inlet pipeline 11 is connected to the corresponding air compressor 3.
In this embodiment, the designed air tank 1 and connection form are used, as a buffer module between the air compressors 3 and an air transportation pipeline, to connect the air compressors 3, stabilize the output air, adjust an air supply form, and reduce the temperature of the output air, thereby improving the applicability and stability of the air supply system. The liquid outlet pipe 22 and the air outlet pipeline 12 are monitored in real time so that whether to add the cooling liquid from the outside and a flow rate at which the cooling liquid is added are carefully adjusted, so as to provide air with a suitable temperature and save energy.
In this embodiment, three air inlet pipelines 11 are provided. Each air inlet pipeline 11 includes an end connected to one air compressor 3 and the other end communicating with the inside of the air tank 1. The air tank 1 is used as a buffer module between the air compressors 3 and the air outlet pipeline 12 to connect the air compressors 3, stabilize the output air, and reduce the temperature of the output air, thereby improving the applicability and stability of the air supply system. The air inlet pipelines 11 and the air outlet pipeline 12 are disposed on two sides of the air tank 1 respectively so that the air enters the air tank 1 through the air inlet pipelines 11, fully exchanges heat with the cooling assembly 2, and then is discharged out of the air tank 1 through the air outlet pipeline 12.
The cooling assembly 2 may include multiple first cooling coils 23, the first cooling coil 23 is disposed between every two adjacent air inlet pipelines 11, each first cooling coil 23 extends along a length direction of the air tank 1, and the first cooling coil 23 has an end communicating with the liquid inlet pipe 21 and the other end communicating with the liquid outlet pipe 22. The first cooling coil 23 is disposed at the center of the air tank 1, is in the shape of a helix, and extends along the length direction of the air tank 1.
The cooling assembly 2 may also include a second cooling coil 24 disposed along the inner wall 16 of the air tank 1. The second cooling coil 24 includes an end communicating with the liquid inlet pipe 21 and the other end communicating with the liquid outlet pipe 22. The second cooling coil 24 is wound along the inner wall 16 of the air tank 1 to surround the air in the air tank 1 and provides a better cooling effect in conjunction with the first cooling coils 23 at the center of the air tank 1.
The air supply system also includes a cooling liquid circulation device. The cooling liquid enters the first cooling coil 23, the second cooling coil 24, and the third cooling coil 18 through the liquid inlet pipe 21, is circulated, and returns to the cooling liquid circulation device through the liquid outlet pipe 22 for reuse.
The first monitoring assembly 13 includes a first temperature sensor 131, a first pressure sensor 132, and a first flow sensor 133 for monitoring the temperature, the pressure, and the flow of the air in the corresponding air outlet pipeline 12 or air inlet pipeline 11, respectively.
The second monitoring assembly 221 includes a second temperature sensor 2211 and a second flow sensor 2212 for monitoring the temperature and the flow of the fluid in the liquid outlet pipe 22, respectively.
As shown in
When the ship is fully loaded, the control center controls all three air compressors 3 to turn on and controls rotational speeds of the air compressors 3. The air compressors 3 discharge air with certain pressure and a certain flow. The control center detects the flow and the temperature of air discharged from the air compressor 3 through the first monitoring assembly 13 on each of the three air inlet pipelines 11, calculates the flow and temperature of intake air, and controls an amount and a flow rate of the cooling liquid through the second remote control valve 211. When the ship is in ballast, the control center turns only one air compressor 3 on to reduce the flow and then controls the second remote control valve 211 to reduce the opening of the second remote control valve 211 so that the amount and the flow rate of the cooling liquid can be reduced. After an air layer drag reduction system of the ship operates for a long term, the required flow decreases, one or two air compressors 3 may be turned off to reduce the air flow, and then the second remote control valve 211 is controlled to reduce the opening of the second remote control valve 211 so that the amount and the flow rate of the cooling liquid are reduced, thereby reducing an energy loss. When the air compressor 3 is turned off, the first remote control valve 14 on the corresponding air inlet pipeline 11 is also turned off, so as to prevent the backflow of air.
The control center monitors the temperature, flow, and pressure of air in the air outlet pipeline 12 through the first monitoring assembly 13 on the air outlet pipeline 12, monitors the temperature and the flow of the returning cooling waste liquid through the second monitoring assembly 221 on the liquid outlet pipe 22, and controls, according to monitoring results, the second remote control valve 211 to turn on or off or increase or decrease the opening, so as to adjust the flow rate at which the cooling liquid enters and adjust a cooling capability. When it is monitored that the temperature of the air in the air outlet pipeline 12 is relatively high, the opening of the second remote control valve 211 is increased, so as to increase the amount and the flow rate of the cooling liquid, improve the cooling capability of the cooling assembly 2, and rapidly cool the air in the air tank 1. When it is monitored that the temperature of the air in the air outlet pipeline 12 is relatively low, the opening of the second remote control valve 211 is decreased, so as to reduce the amount and the flow rate of the cooling liquid and reduce the energy loss.
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This embodiment further provides a ship including the preceding air supply system. The preceding air supply system is used to avoid mutual interference between multiple air compressors, stabilize air in a pipeline, prolong the service life of the pipeline, and ensure the normal operation of the ship.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110195731.6 | Feb 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/079052 | 3/4/2021 | WO |
