KR102816288B1 - A ship surface cooling test device using a seawater nozzle - Google Patents

Abstract

The present invention relates to a vessel surface cooling test apparatus using a seawater nozzle, and comprises: a jig on which a hull to be cooled can be placed; a cooling fluid injection unit which can spray a cooling fluid onto the surface of the hull; a collection unit which is arranged adjacent to the jig and can receive a fluid scattered from the surface of the hull; and a sensing unit which measures the weight and temperature of the fluid collected in the collection unit. The sensing unit is characterized in that it measures the temperature of each scattering location of the scattered fluid during the process of cooling the hull, so that the amount of heat removed from the hull surface through the cooling fluid injection unit can be predicted.
Therefore, according to the present invention, there is an effect in that the heat capacity is measured for each scattered location of a fluid cooling the surface of the hull, thereby allowing the cooling efficiency for the hull to be tested, and the installation of a seawater nozzle for cooling the hull can be optimized.

Description

{A ship surface cooling test device using a seawater nozzle}

The present invention relates to a ship surface cooling test device using a seawater nozzle, and more specifically, to a ship surface cooling test device using a seawater nozzle which collects seawater scattered when cooling the ship surface through a seawater nozzle and analyzes the amount of heat, thereby enabling the nozzle position to be optimized.

In general, the surface temperature of a ship transporting LNG reaches about 60 degrees due to direct sunlight, etc. When this surface temperature of the ship penetrates inside and is transmitted to the tank where the LNG is stored, the liquefied and stored gas evaporates and vaporizes, so the technology to cool the hull is very important. In addition, in a military environment, lowering the temperature of the hull of a ship reduces the infrared signal, which is a matter directly related to survival. There is a method of rapidly lowering the hull temperature by spraying seawater on the hull as a means of lowering the surface temperature of the ship. However, since the heat capacity to be removed varies depending on the season and weather conditions, it is necessary to adjust the amount of seawater sprayed according to the situation and to optimize the operation method.

As a prior art document for testing such cooling technology, Korean Patent No. 10-1243175 discloses a performance test device for a cooling water injection nozzle, including a configuration for reproducing external conditions similar to those in which a solar module is installed externally.

However, according to these conventional technologies, there is a problem in that it is difficult to test ship cooling technology that optimizes seawater pump capacity and pipeline diameter according to season and weather conditions.

(Prior Document 1) Republic of Korea Publication Patent No. 10-2018-0086827 (2018.08.01.)

The present invention has been devised to solve the problems of the prior art as described above, and its purpose is to collect heat capacity information for each splash location of a fluid sprayed and splashed on the surface of a hull so that the installation location of a seawater nozzle can be optimized.

In a preferred embodiment of the present invention, a ship surface cooling test device using a seawater nozzle comprises: a jig on which a hull to be cooled can be placed; a cooling fluid injection unit capable of spraying a cooling fluid onto the surface of the hull; a collection unit disposed adjacent to the jig capable of receiving a fluid scattered from the surface of the hull; and a sensing unit capable of measuring the weight and temperature of the fluid received in the collection unit, wherein the sensing unit is characterized in that it measures the temperature of each scattering location of the scattered fluid during the process of cooling the hull, so that the amount of heat removed from the hull surface through the cooling fluid injection unit can be predicted.

By the means for solving the above problem, the present invention has the effect of allowing the heat capacity to be measured for each location where a fluid for cooling the surface of the hull is sprayed, thereby testing the cooling efficiency for the hull, and optimizing the installation of a seawater nozzle for cooling the hull.

In addition, the present invention has the effect of providing an environment similar to an environment in which fluid is sprayed on an actual ship by allowing the height and angle of the hull to be freely adjusted.

In addition, the present invention has the effect of allowing the nozzle to be installed in various shapes and the cooling efficiency to be tested by adjusting the angle, height, water pressure, and flow rate of the nozzle that sprays seawater.

Figure 1 is a schematic diagram of a ship surface cooling test device using a seawater nozzle according to the first embodiment of the present invention.
FIG. 2 is a drawing showing a hull installed in a ship surface cooling test device using a seawater nozzle according to the first embodiment of the present invention in an inclined state.
FIG. 3 is a drawing showing a state in which the nozzle height and angle of a ship surface cooling test device using a seawater nozzle according to the first embodiment of the present invention are adjusted.
FIG. 4 is a plan view of a ship surface cooling test device using a seawater nozzle according to the first embodiment of the present invention.
FIG. 5 is a drawing showing an example of data collected by a ship surface cooling test device using a seawater nozzle according to the first embodiment of the present invention.

The terms used in this specification will be briefly explained, and the present invention will be described in detail.

The terms used in the present invention are selected from the most commonly used terms in current practice, taking into consideration the functions of the present invention. However, these may vary depending on the intentions of engineers in the field, precedents, the emergence of new technologies, etc. Therefore, the terms used in the present invention should be defined based on the meaning of the terms and the overall content of the present invention, rather than simply the names of the terms.

When a part of a specification is said to “include” a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

The specific details of the present invention, including the problems to be solved, the means for solving the problems, and the effects of the invention, are included in the embodiments and drawings described below. The advantages and features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described below in detail together with the accompanying drawings.

Hereinafter, a ship surface cooling test device using a seawater nozzle of the present invention will be described in detail with reference to the attached drawings.

A ship surface cooling test device using a seawater nozzle according to a preferred first embodiment of the present invention, with reference to FIGS. 1 to 4, includes a jig (100) on which a hull (50) as a cooling target can be placed, a cooling fluid injection unit (200) that allows a cooling fluid to be injected onto the surface of the hull (50), a collection unit (300) that is arranged adjacent to the jig (100) and allows a fluid flying from the surface of the hull (50) to be received, and a sensing unit (400) that measures the weight and temperature of the fluid received in the collection unit (300). In addition, the sensing unit (400) measures the temperature of each flying location of the flying fluid during the process of cooling the hull (50), so that the amount of heat removed from the surface of the hull (50) through the cooling fluid injection unit (200) can be predicted.

More specifically, the present invention relates to a device that enables information on the amount of heat removed from a hull (50) to be collected during the process of cooling the surface of the hull (50) through a cooling fluid injection unit (200) that sprays seawater, thereby enabling the height, angle, flow rate, water pressure, etc. of a nozzle (240) that sprays seawater onto the hull (50) to be optimized.

For example, the jig (100) serves to fix and load the hull (50). The jig (100) is connected to both sides of the hull (50) and supports the hull (50) so that it is separated from the ground. In this embodiment, the jig (100) is described as supporting one side of both sides of the hull (50), but it is obvious that the jig (100) can be prepared in various forms within a range that does not deviate from the embodiment of the present invention. In addition, the jig (100) includes an angle adjustment part (110) that is connected to both sides of the hull (50) and allows the hull (50) to tilt in one direction, a lift (120) that is provided to support the angle adjustment part (110) and allows the angle cutting part (110) to be raised and lowered, and a jig transfer part (130) that is provided at the lower end of the lift (120).

First, the angle adjustment part (110) is provided so that both sides of the jig (100) are connected by a rotatable shaft. In addition, the angle adjustment part (110) is fastened to the jig (100) by a nut, and is provided so that it can be loosened or fixed depending on the tightening of the nut. That is, the angle adjustment part (110) allows the hull (50) to be rotated around one axis, and is selectively fixed so that the hull (50) can be fixed in a state of being tilted at a predetermined angle or upright.

In addition, the lift (120) is provided to support the angle adjustment part (110) and can be raised and lowered. Accordingly, the lift (120) allows the height of the position where the hull (50) is fixed to be set.

In addition, the jig transport unit (130) is provided at the lower end of the jig (50) to support the load of the jig (100) and the hull (50), and is provided with wheels (not shown) so that the jig (100) can be transported by rolling motion in the direction in which it is pressed. Accordingly, the jig (100) has the effect of allowing the hull (50) to be fixed in various positions and heights, thereby providing an environment similar to the hull surface according to the actual position of the ship.

The cooling fluid injection unit (200) above serves to inject cooling fluid for cooling the surface of the hull (50). At this time, the cooling fluid injection unit (200) is for testing so that the equipment for injecting the fluid can be optimized for cooling the surface of an actual ship, and allows the fluid to be injected at various angles, water pressures, and heights. In addition, although the fluid in this embodiment refers to seawater, it is obvious that various fluids other than seawater can be used as long as it is for cooling the surface of the hull (50). In addition, the cooling fluid injection unit (200) includes a tank (210) in which a cooling fluid is stored, a pressure regulating unit (220) for regulating the internal pressure of the tank (210), a pipeline (230) connected to the tank (210) and allowing the fluid to be transported from the tank (210), and a nozzle (240) connected to the pipeline (230) and allowing the fluid to be injected.

First, the tank (210) is provided with a receiving space and is sealed inside. The tank (210) can store a fluid sprayed through the nozzle (240). In addition, the tank (210) is provided with a level gauge (211) that allows the water level inside the tank (210) to be checked. In addition, the pressure control unit (220) is connected to one side of the tank (210) so that the internal pressure can be controlled by injecting gas into the tank (210).

The above pressure regulating unit (220) includes a compressor (221) that compresses air so that compressed air can be supplied, a regulator (222) that is provided between the compressor (221) and the tank (210) so that the pressure of the air supplied into the tank (210) is regulated, and a pressure gauge (223) that measures the internal pressure of the tank (210). That is, the internal pressure of the tank (210) can be maintained at a preset pressure, and the hydraulic pressure of the fluid received by the internal pressure can be set. At this time, by maintaining the flow rate discharged from the tank (210) and the flow rate supplied by the compressor (221) constant, the flow rate of the fluid sprayed through the nozzle (240) can be maintained constant.

In addition, the pipeline (230) extends from one side of the tank (210) and communicates with the nozzle (240). That is, the pipeline (230) functions to allow the fluid in the tank (210) to be delivered to the nozzle (240). In addition, the pipeline (230) includes a valve (231) that opens and closes the pipeline (230), a flexible hose (232) that connects the rear end of the pipeline (230) and the nozzle (240), and a flow meter (233) that measures the flow rate of the fluid flowing in the pipeline (230). Then, when the valve (231) is opened, the fluid in the tank (210) can flow into the pipeline (230) by internal pressure. In addition, the flexible hose (232) can be provided in the form of a flexible rubber hose so that the fluid can be easily delivered even when the height or angle of the nozzle (240) is adjusted. And, the flow meter (233) measures the flow rate of the fluid flowing within the pipeline (230). However, since all the fluid flowing within the pipeline (230) is sprayed through the nozzle (240), the measured flow rate means the flow rate sprayed through the nozzle (240).

The nozzle (240) serves to spray a cooling fluid, which is provided as seawater, toward the hull (50). At this time, a deflector is provided at the end of the nozzle (240) so that the spraying shape of the fluid can be set. In addition, the nozzle (240) is installed on the upper part of a tower (201) that is provided vertically from the ground. In addition, the nozzle (240) includes a height adjustment part (241) that allows the height of the nozzle (240) to be adjusted, a flange part (242) that allows the angle of the nozzle (240) to be adjusted, and a water pressure sensor (243) that measures the water pressure of the nozzle (240). The height adjustment part (241) is provided in a pulley shape so that the height of the nozzle (240) can be precisely adjusted. At this time, the height adjustment part (241) can be provided in various forms, such as an actuator, within a range that does not deviate from the present embodiment. At this time, a rail is formed on the tower (201) so that the nozzle (200) can be naturally raised and lowered, and the direction of movement is guided. In addition, the nozzle (240) can be selectively bolted so that the height can be fixed. In addition, the flange part (242) is provided on one side of the nozzle (240), and has a plurality of holes, and the fluid spray angle by the nozzle (240) can be precisely set through the holes. In addition, a water pressure sensor (243) is provided on one side of the nozzle (240) so that the water pressure of the fluid sprayed on the hull (50) can be measured.

Next, the water collection unit (300) serves to collect the fluid sprayed from the cooling fluid injection unit (200) that touches the hull (50) and is scattered, and the fluid flowing downward along the surface of the hull (50). For example, the water collection unit (300) includes a first water collection tank unit (310) arranged to be in contact with one surface of the hull (50) and arranged in a plurality of rows corresponding to the width of the hull (50), and a second water collection tank unit (320) arranged adjacent to the first water collection tank (310) and arranged in a plurality of rows facing the surface of the hull (50) from which the fluid is scattered. The first water collection tank unit (310) and the second water collection tank unit (320) are configured so that a large number of water collection tanks of the same standard are adjacent to each other, so that the water collection tanks can be arranged in a grid shape. And, the first water collection tanks (310) are arranged in a row so as to correspond to the width of the hull (50). In addition, the first water collection tanks (310) are arranged so that one side touches the surface of the hull (50), so that a fluid flowing down along the surface of the hull (50) or falling vertically can be accommodated. And, the second water collection tanks (320) are arranged in a plurality of rows so as to correspond to the first water collection tanks (310). That is, the water collection tanks (300) are arranged so that a plurality of water collection tanks are arranged in a grid shape between the hull (50) and the cooling fluid injection unit (200), so that all fluids flying from the hull (50) can be accommodated.

Lastly, the sensing unit (400) serves to measure the temperature and weight of the fluid received in the water collection unit (300). More specifically, the sensing unit (400) includes a temperature sensing unit (410) that measures the temperature of the fluid collected in the water collection unit (300) and a weight sensing unit (420) that measures the weight of the fluid collected in the water collection unit (300).

The temperature sensing unit (410) above enables the temperature of each of the plurality of water collection tanks constituting the water collection unit (300) to be individually measured. For example, as shown in FIG. 5, the temperature of the fluid contained in each of the water collection tanks arranged in a grid shape by the temperature sensing unit (410) is measured, so that the temperature of the fluid flying from the surface of the hull (50) can be individually measured.

In addition, the weight sensing unit (420) enables the weight of the fluid contained in each of the plurality of water collection tanks to be measured, similar to the temperature sensing unit (410). That is, according to the measurement result of the sensing unit (400), the temperature and weight of the fluid scattered from the surface of the hull (50) can be measured to determine the heat capacity according to the location of the scattered fluid, thereby enabling the heat removal amount for the hull (50) to be determined.

Therefore, according to the present invention, there is an effect in that the heat capacity is measured for each scattered location of a fluid cooling the surface of the hull, thereby allowing the cooling efficiency for the hull to be tested, and the installation of a seawater nozzle for cooling the hull can be optimized.

It should be understood that the embodiments described above are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

50 : Hull
100 : Jig
110 : Angle adjustment part
120 : Lift
130 : Jig transfer unit
200: Cooling fluid injection unit
201 : Tower
202: Tower Transport Unit
210 : Tank
211 : Level Gauge
220 : Pressure control unit
221 : Compressor
222 : Regulator
223 : Pressure Gauge
230 : Pipeline
231 : Valve
232 : Flexible hose
233 : Flow meter
240 : Nozzle
241: Height adjustment part
242 : Flange
243 : Water pressure sensor
300 : Waterworks Department
310: 1st water tank
320: Second water tank
400 : Sensing part
410: Temperature sensing unit
420: Weight sensing unit

Claims (5)

A jig on which the hull to be cooled can be placed;
A cooling fluid spray unit that enables cooling fluid to be sprayed onto the surface of the hull;
A water collection unit arranged adjacent to the jig and capable of receiving fluid flying from the surface of the hull; and
It includes a sensing unit that measures the weight and temperature of the fluid received in the above-mentioned collection unit;
A ship surface cooling test device using a seawater nozzle, characterized in that the sensing unit measures the temperature of each splash location of the splashed fluid during the process of cooling the hull, so that the amount of heat removed from the hull surface through the cooling fluid injection unit can be predicted. In the first paragraph,
The above jig,
An angle adjusting member connected to both sides of the hull and allowing the hull to tilt in one direction; and
A ship surface cooling test device using a seawater nozzle, characterized in that it includes a lift which is provided to support the angle adjustment unit and allows the angle adjustment unit to be raised and lowered. In the first paragraph,
The cooling fluid injection unit is
A tank in which cooling fluid is stored;
A pressure regulating unit for regulating the pressure inside the tank;
A pipeline connected to the above tank and allowing the fluid to be transported from the tank; and
A ship surface cooling test device using a seawater nozzle, characterized in that it includes a nozzle connected to the pipeline so as to allow the fluid to be sprayed. In the third paragraph,
The above nozzle,
A height adjustment unit for adjusting the height of the nozzle; and
A ship surface cooling test device using a seawater nozzle, characterized in that it includes a flange portion for adjusting the angle of the nozzle. In the first paragraph,
The above collection department is,
A first water collection tube section arranged to be in contact with one side of the hull and arranged in a plurality to correspond to the width of the hull; and
A ship surface cooling test device using a seawater nozzle, characterized by including a second water collection tank section arranged adjacent to the first water collection tank and having a plurality of sections arranged in a direction facing the surface of the hull from which the fluid is sprayed.