KR101920156B1 - Suction air cooling module and suction air cooling system for gas turbine using the same - Google Patents

Abstract

The present invention provides a suction air cooling module and a suction air cooling system for a gas turbine using the same. The suction air cooling module comprises: a frame unit in which an air inlet and an air outlet are formed, and a hollow portion connecting the air inlet and the air outlet is formed; a cooling pad unit mounted in the air inlet of the frame unit, connected to a cooling water supply unit supplying cooling water, and cooling air flowing by absorbing moisture supplied from the cooling water supply unit; and a scattering prevention pad unit mounted in the air outlet of the frame unit, forming a space portion by being spaced from the cooling pad unit at a predetermined separation distance, and absorbing moisture passing through the space portion to prevent moisture flowing into the space portion from scattering to the outside through the air outlet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an intake air cooling module and a gas turbine intake air cooling system using the same,

The present invention relates to an intake air cooling module and a gas turbine intake air cooling system using the same, and more particularly, to an intake air cooling module for blocking moisture introduced into a gas turbine when cooling air sucked into a gas turbine, To a gas turbine inlet air cooling system.

Generally, a gas turbine is a rotary power engine that extracts energy from the flow of combustion gases. The gas turbine is composed of an air compressor, a turbine, and a combustion chamber. The air compressed in the air compressor is mixed with the fuel and burned in the combustion chamber, so that the gas of high temperature and high pressure is expanded and the turbine is driven by this force. The energy generated by the driving of the turbine is transmitted through the turbine shaft as a torque or in the form of thrust or compressed air. This energy is used to drive generators, aircraft, trains, ships, and so on. The higher the efficiency of the compressor and the turbine, the better the thermal efficiency of the gas turbine. The higher the compression pressure, the better. The higher the temperature of the combustion gas entering the turbine, the better the thermal efficiency.

These gas turbine power plants are used for power supply to the peak load in summer because of high cost of power generation compared to nuclear power and coal power generation facilities.

However, since the gas turbine is an engine that sucks a certain volume of air regardless of the atmospheric temperature, when the atmospheric temperature increases in summer, the temperature of the air flowing into the gas turbine increases to become bulky, The absolute amount of air flowing into the combustion chamber decreases. As a result, more energy is consumed to compress the air.

Therefore, as the temperature of summer increases, the power load increases while the output and efficiency of the gas turbine decrease.

In order to solve this problem, various methods have been developed as Turbine Inlet Air Cooling (TIAC) systems of gas turbines in order to cool the intake air of the gas turbine to increase the output of the gas turbine which is reduced in the summer .

Among them, the evaporative cooling method is a method of directly spraying water onto a pad (a cooling pad) capable of absorbing water to cool the air passing through the pad. However, according to the vaporization cooling method, there may arise operational problems such as jetting water to the gas turbine, damaging the compressor and the blade, and increasing the filter differential pressure due to moisture.

Further, in the case of a gas turbine, dust or water droplets contained in the air may cause damage to the blades of the gas turbine and the compressor. Therefore, a filter house may be installed at the inlet of the gas turbine to minimize the inflow of foreign matter have. Then, this vaporization cooler is installed in the filter house of the gas turbine.

However, when the vapor cooler is installed in the filter house, the inflow of the foreign matter is minimized, but the differential pressure may increase and the turbine output may decrease. Therefore, when the filter house is provided with a mist eliminator separately from the cooling device, The differential pressure may further increase. Further, if the dehumidifier is installed separately, the total pressure difference of the filter house is increased, the production cost is expensive, and various problems such as space restriction may occur at the time of installation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an intake air cooling module and a gas turbine intake air cooling system using the same, which minimizes the inflow of moisture into a gas turbine to operate a stable gas turbine .

Another object of the present invention is to provide an intake air cooling module and a gas turbine intake air cooling system using the same, which minimizes the investment cost and installation cost in installation of the gas turbine, efficiently utilizes the space, and reduces the differential pressure effect do.

In order to achieve the above object, an intake air cooling module according to the present invention comprises: a frame part formed with an air inflow part and an air outflow part and having a hollow communicating the air inflow part and the air outflow part; A cooling pad unit that is mounted on the sub-side and is connected to a cooling water supply unit that supplies cooling water, and that absorbs moisture supplied from the cooling water supply unit to cool the introduced air; , And a scattering-preventing pad portion that is spaced apart from the cooling pad portion by a predetermined gap distance (L) to form a space portion and absorbs moisture passing through the space portion, the moisture introduced into the space portion is absorbed by the air outflow Preventing pad portion is formed inside the frame portion together with the cooling pad portion so as to prevent the scattering pad portion from being scattered to the outside, And the moisture absorbing pad portion is configured to absorb the moisture introduced into the space portion without passing through the scattering preventing pad portion as it is, Wherein the frame portion is fixed based on a flow rate and an amount of water introduced into the cooling pad portion and the scattering prevention pad portion so that the cooling pad portion and the scattering- The first pad guide is provided in the space and is protruded in the direction toward the hollow, and the movement of the cooling pad toward the space is limited, And the second pad guide is disposed on the space portion facing the space portion of the cooling pad portion so that the second pad guide is spaced apart from the first pad guide And a surface of the scatter preventive pad portion facing the space is hooked so as to protrude in a direction toward the hollow and restrict movement of the scatter preventive pad toward the space.

According to another aspect of the present invention, there is provided a gas turbine intake air cooling system using a cooling module, the system comprising: a filter house installed at an inlet of a gas turbine into which air is introduced; And a suction air cooling module for cooling the air sucked into the suction air cooling module, wherein the suction air cooling module comprises: a frame part in which an air inlet part and an air outlet part are formed and in which a hollow for communicating the air inlet part and the air outlet part is formed; A cooling pad portion mounted on the air inlet portion side in the frame portion and connected to a cooling water supply portion for supplying cooling water to cool the incoming air by absorbing moisture supplied from the cooling water supply portion; And a space portion formed to be spaced apart from the cooling pad portion by a predetermined distance L, The air intake cooling system according to claim 1, wherein the intake air cooling module includes: a first air intake port for introducing air into the space, And the cooling pad portion and the shatterproof pad portion are additionally mounted so as to be modularized into a double pad structure, and the separation distance L is set such that the moisture introduced into the space portion does not pass through the shatterproof pad portion as it is, And the frame portion is set on the basis of the flow rate and amount of the moisture introduced into the space portion so as to be absorbed by the scattering prevention pad portion so that the space between the cooling pad portion and the scattering- Further comprising a first pad guide and a second pad guide for fixing the position of the pad portion and the scattering prevention pad portion, A surface of the cooling pad portion facing the space is hooked so as to protrude in a direction toward the hollow and restrict the movement of the cooling pad toward the space, The surface of the scattering-preventing pad portion facing the space portion is hooked so that the scattering-preventing pad portion is protruded in the direction toward the hollow and is restricted from moving toward the space portion .

As described above, the suction air cooling module according to the present invention differs from the prior art in that a moisture eliminator is separately provided separately from a cooler, a cooling pad is additionally mounted on one cooling module to form a modularized form, It is possible to minimize the inflow of water into the gas turbine and maintain stable operation of the gas turbine by maintaining a proper separation distance between the cooling pad portion and the scatter preventive pad portion.

Further, according to the present invention, there is no need to separately install a dehumidifier, it is possible to minimize the investment cost and installation cost when installing the gas turbine, and to utilize the space efficiently. Further, the effect of reducing the differential pressure effect can be obtained as compared with the case where the conventional moisture eliminator is installed.

1 is a perspective view illustrating an intake air cooling module according to an embodiment of the present invention.
2 is a side sectional view of Fig.
3 is a cross-sectional view showing the cooling pad portion and the scattering-preventing pad portion in FIG.
4 is a conceptual view of a cooling pad portion applied to an embodiment of the present invention.
5 is a front view showing an embodiment of a gas turbine intake air cooling system using a cooling module according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the embodiments described below are embodiments suitable for understanding the technical characteristics of the intake air cooling module of the present invention and the gas turbine intake air cooling system using the same. However, the technical features of the present invention are not limited by the embodiments to which the present invention is applied or explained in the following embodiments, and various modifications are possible within the technical scope of the present invention.

1 to 3, the suction air cooling module 100 according to an embodiment of the present invention includes a frame part 200, a cooling pad part 400, (600).

The frame portion 200 is formed with an air inflow portion 201 and an air outflow portion 203 and a hollow for communicating the air inflow portion 201 and the air outflow portion 203.

Specifically, the frame part 200 may be provided as a frame having a shape opened frontward and rearward, as in the embodiment shown in FIG. 1, and an air inflow part 201 is provided at one opening part And the air outlet 203 may be provided in the opening of the other side. The frame part 200 may be installed in a filter house (not shown) provided at the gas turbine inlet, for example, as described later. Air introduced into the gas turbine can be introduced into the air inlet 201 and air passing through the hollow provided in the frame 200 can be flowed out to the air outlet 203.

The cooling pad unit 400 is mounted on the air inflow unit 201 side of the frame unit 200 and is connected to a cooling water supply unit 300 for supplying cooling water and absorbs moisture supplied from the cooling water supply unit 300 To cool the incoming air.

2 and 4, the cooling pad unit 400 may be mounted on the side of the air inlet 201 to cool the incoming air. In addition, the cooling pad unit 400 can absorb the moisture supplied from the cooling water supply unit 300, collide the absorbed moisture with the inflow air, and cool the air. In Fig. 2, A1 is air supplied to the air inlet 201, and may be room temperature or high temperature air depending on the temperature of the outside air. In FIG. 2, A2 may be air that has passed through the cooling pad unit 400 and has been cooled.

The scattering prevention pad portion 600 is mounted on the air outlet portion 203 side of the frame portion 200 and spaced apart from the cooling pad portion 400 by a predetermined distance to form a space portion, Absorbs moisture passing through the space portion so as to prevent moisture that has flowed into the space portion from being scattered to the outside through the air outlet portion 203. [

Specifically, the scattering-preventing pad unit 600 may be provided on the frame unit 200 so as to be disposed on the air outlet unit 203 side separately from the cooling pad unit 400. The scattering-preventing pad portion 600 may be spaced apart from the cooling pad portion 400 to form a space between the cooling pad portion 400 and the cooling pad portion 400.

The air A2 cooled by the cooling pad unit 400 and the water W supplied to the cooling pad unit 400 by the cooling water supply unit 300 may be introduced into such a space part together. In this case, when the moisture introduced from the cooling pad unit 400 passes through the scattering prevention pad unit 600 as it is, an apparatus (for example, a blade (not shown) and a gas turbine A compressor (not shown), and the like). In order to solve such a problem, the cooling module according to the present invention is provided with a scattering-preventing pad portion 600 separately from the cooling pad portion 400 so that water introduced into the space portion is not scattered to the outside through the airflow outlet portion 203 . The material of the scattering-prevention pad unit 600 may be made of the same material as the cooling pad unit 400, but is not limited thereto.

At this time, the separation distance L, which is the distance between the cooling pad part 400 and the scattering-prevention pad part 600, is set such that the moisture introduced into the space part does not pass through the scattering- And may be a distance that can be absorbed by the pad unit 600. [

Specifically, the water W injected from the cooling water supply part 300 to the cooling pad part 400 moves from the cooling pad part 400 to the space part by the flow velocity of the introduced air. At this time, if the distance between the cooling pad portion 400 and the scattering-preventing pad portion 600 is too close, the water W flowing into the space portion can pass through the scattering-preventing pad portion 600 as it is. When the scattering-preventing pad unit 600 and the cooling pad unit 400 are installed apart from each other by an appropriate separation distance L, at least a part of the water droplets as the introduced water W moves along the air flow, And can move toward the bottom of the frame portion 200 or the lower end of the scattering prevention pad portion 600 within the space portion. Accordingly, when the amount of water (W, water droplets) approaching the scattering-prevention pad unit 600 decreases or the flow rate of water decreases, the moisture approaching the scattering- Most of which can be absorbed. That is, due to the separation distance L forming the appropriate space portion, the moisture introduced into the space portion can be absorbed by the scattering-preventing pad portion 600, and water is scattered to the outside of the air outlet portion 203 .

However, if the separation distance L is too long, the space occupied in the cooling module 100 may increase, or the size of the entire cooling module 100 may increase. Therefore, it is preferable that the separation distance L is in a range where the moisture introduced into the space portion can be absorbed by the scattering-prevention pad portion 600, and the space charge ratio is not too large. Such a separation distance L can be variously applied depending on the installation environment of the cooling module and the work process.

Here, the size of the cooling pad unit 400 and the scattering-preventing pad unit 600 may be variously adapted to the size of the frame unit 200. [ The thickness of the cooling pad portion 400 and the scattering prevention pad portion 600 can be variously changed according to the characteristics of the installed environment and the cooling efficiency, the target cooling temperature, the amount of cooling water supplied, and the like.

As described above, the suction air cooling module 100 according to the present invention is different from the prior art in that the moisture eliminator is separately provided separately from the cooler, and the scattering prevention pad portion 600 is added to one cooling module in addition to the cooling pad portion 400 And a proper separation distance L is maintained between the cooling pad portion 400 and the scattering prevention pad portion 600 to minimize the inflow of water into the gas turbine and to operate the stable gas turbine .

In addition, since there is no need to provide a separate desulfurizer, the investment cost and the installation cost for installing the gas turbine can be minimized, and the space can be utilized efficiently. Further, the effect of reducing the differential pressure effect can be obtained as compared with the case where the conventional moisture eliminator is installed.

Meanwhile, the cooling pad unit 400 and the scattering-preventing pad unit 600 may be detachably attached to the frame unit 200. There are no limitations on the installation method of the cooling pad part 400 and the scattering prevention pad part 600. Various mounting methods can be applied as long as they can be easily separated after being assembled or coupled to the frame part 200 .

Since the cooling pad unit 400 and the scattering prevention pad unit 600 are detachably installed in this manner, the cooling pad unit 400 can be removed in the winter when the air is not cooled. In the maintenance of the cooling module 100, 400 and the shatterproof pad unit 600 can be replaced.

The cooling pad part 400 and the scattering prevention pad part 600 include a sponge shape having a plurality of voids to allow the inflow air to pass therethrough, Can be formed larger than the void.

Specifically, the scattering-preventing pad portion 600 may be formed of a material that is thicker than the cooling pad portion 400. Accordingly, even if the cooling module 100 is formed of a double pad, it is possible to minimize the increase of the differential pressure and to prevent the turbine output from decreasing due to the increase of the differential pressure.

1 and 2, the frame unit 200 may further include an upper cover 210 and a lower cover 230.

The upper cover 210 may be formed with a cooling water injection pipe 212 connected to the cooling water supply unit 300 and provided to inject moisture into the cooling pad unit 400. The communication hole 213 may be formed in the upper cover 210 so that the water sprayed from the cooling water injection pipe 212 is supplied to the cooling pad unit 400. The lower cover 230 may include a cooling pad portion 400 and a trough 231 through which the water absorbed by the scattering prevention pad portion 600 is drained.

The cooling water supply unit 300 may include a water supply line 310 and a drain line 330.

The water supply line 310 is connected to the cooling water injection pipe 212 to supply water. The drain line 330 is connected to the gutter 231 to process the water to be drained. Here, the water supply line 310 may be connected to the cooling water injection pipe 212 through an inlet 211 provided in the cooling water injection pipe 212. The trough 231 may be inclined at the bottom so as to facilitate the treatment of the discharged water.

3, the frame unit 200 may further include a first pad guide 251 and a second pad guide 253. The first pad guide 251 and the second pad guide 253 may be formed separately from each other.

The first pad guide 251 is formed to protrude in the hollow direction to fix the position of the cooling pad unit 400 so as to maintain a spacing L between the cooling pad unit 400 and the scattering- . The second pad guide 253 may be formed to protrude in the hollow direction to fix the position of the scattering prevention pad unit 600.

The first pad guide 251 and the second pad guide 253 fix the position of the cooling pad portion 400 and the scattering prevention pad portion 600 to each other, (L) can be prevented from being changed.

The protruded shapes of the first pad guide 251 and the second pad guide 253 are not limited to the illustrated embodiment and may be different from the positions of the cooling pad unit 400 and the scattering- It is possible to implement various modifications.

Hereinafter, the intake air cooling process and the moisture removal process of the intake air cooling module 100 according to the present invention will be described.

The water supplied from the water supply line 310 flows into the cooling water injection pipe 212 through the inlet 211 and the water introduced into the cooling water injection pipe 212 is injected into the cooling pad unit 400, And may be supplied to a substantial portion of the cooling pad unit 400 while moving in the direction D shown in FIG.

The external air A1 flows through the air inlet 201 and passes through the cooling pad unit 400 so that it can collide with the water absorbed by the cooling pad unit 400 and can be cooled. The cooled air (A2) and the water (W) supplied to the cooling pad unit (400) can move to the space part by the flow rate of the outside air.

The water W supplied to the cooling pad unit 400 is transferred to the cooling pad unit 400 in a downward direction due to its own weight while passing through the space formed by the cooling pad unit 400 and the scattering prevention pad unit 600 separated by the separation distance L It may move and weaken the flow rate or fall to the bottom. Accordingly, the moisture W approaching the scattering-preventing pad unit 600 can be mostly absorbed by the scattering-preventing pad unit 600. Therefore, the moisture content in the air A3 flowing out through the air outlet 203 is small, and damage to the equipment installed at the rear end can be prevented.

1 to 5, a gas turbine intake air cooling system 10 using a cooling module according to another aspect of the present invention will be described.

The gas turbine inlet air cooling system 10 using the cooling module according to the present invention may include a filter house and an intake air cooling module 100.

The filter house may be installed at the inlet of the gas turbine into which air is introduced.

The intake air cooling module 100 can be installed inside the filter house to cool the air sucked into the compressor of the gas turbine.

Specifically, the intake air cooling module 100 includes an air inlet portion 201 and an air outlet portion 203. The hollow air inlet portion 201 and the air outlet portion 203 are communicated with each other. The cooling water supply unit 300 is connected to the air inlet 201 of the frame unit 200 and is connected to a cooling water supply unit 300 for supplying cooling water. And a cooling pad unit 400 mounted on the side of the air outflow unit 203 of the frame unit 200 and spaced apart from the cooling pad unit 400 by a predetermined distance L, Scattering pad portion 600 for absorbing moisture passing through the space portion so as to prevent moisture that has flowed into the space portion from being scattered to the outside through the air outlet portion 203.

5, the intake air cooling module 100 may be provided in a plurality of stacked layers in at least one of the longitudinal direction and the transverse direction inside the filter house.

In particular, the intake air cooling module 100 may be installed in an appropriate number of layers stacked or arranged in the longitudinal and transverse directions to suit the area of the filter house and the size and usability of the gas turbine. The suction air cooling module 100 constructed as described above can be manufactured in advance and installed in an appropriate number in accordance with the installation environment, so that field applicability can be improved and the working time can be shortened.

Here, the water supply line 310 and the drain line 330 may be separately provided according to the respective intake air cooling modules 100. However, as shown in the illustrated embodiment, one water supply line 310 and one A plurality of intake air cooling modules 100 may be connected to the drain line 330.

As described above, the suction air cooling module according to the present invention differs from the prior art in that a moisture eliminator is separately provided separately from a cooler, a cooling pad is additionally mounted on one cooling module to form a modularized form, It is possible to minimize the inflow of water into the gas turbine and maintain stable operation of the gas turbine by maintaining a proper separation distance between the cooling pad portion and the scatter preventive pad portion.

In addition, since there is no need to provide a separate desulfurizer, the investment cost and the installation cost for installing the gas turbine can be minimized, and the space can be utilized efficiently. Further, the effect of reducing the differential pressure effect can be obtained as compared with the case where the conventional moisture eliminator is installed.

While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made without departing from the scope of the present invention.

100: Suction air cooling module 200:
201: air inlet 203: air outlet
210: upper cover 212: cooling water injection pipe
230: lower cover 231:
251: first pad guide 253: second pad guide
300: Cooling water supply part 310: Water supply line
330: Drain line 400: Cooling pad section
600: Shatterproof pad portion
10: Gas turbine intake air cooling system using cooling module

Claims (9)

A frame part having an air inflow part and an air outflow part and having a hollow for communicating the air inflow part and the air outflow part;
A cooling pad unit mounted on the air inlet side of the frame unit and connected to a cooling water supply unit for supplying cooling water, the cooling pad unit absorbing moisture supplied from the cooling water supply unit to cool the introduced air; And
A scattering prevention pad portion mounted on the side of the air outlet portion in the frame portion and spaced apart from the cooling pad portion by a predetermined distance L to form a space portion and absorbing moisture passing through the space portion So,
Preventing pad portion is additionally mounted together with the cooling pad portion in the frame portion so as to prevent moisture that has flowed into the space portion from being scattered to the outside through the air outlet portion,
The separation distance L is set based on the flow rate and amount of the water introduced into the space portion so that the moisture introduced into the space portion can be absorbed by the scattering prevention pad portion without passing through the scattering prevention pad portion as it is And,
The frame portion may further include a first pad guide and a second pad guide for fixing a position of the cooling pad portion and the scattering-prevention pad portion so as to maintain a separation distance between the cooling pad portion and the scattering- ,
Wherein the first pad guide is provided in the space portion and is protruded in a direction toward the hollow portion so that the surface of the cooling pad portion facing the space portion is restricted so that the movement of the cooling pad portion toward the space portion is restricted,
The second pad guide is provided in the space portion so as to be spaced apart from the first pad guide and protrudes in a direction toward the hollow portion so that movement of the shatterproof pad portion toward the space portion is restricted, And a surface facing the space is hooked. delete The method according to claim 1,
Wherein the cooling pad portion and the scattering-prevention pad portion are detachably installed in the frame portion. The method according to claim 1,
Wherein the cooling pad portion and the scatter preventive pad portion include a sponge shape having a plurality of voids to allow the inflow air to pass therethrough and the air gap of the scatter preventive pad portion is formed larger than the air gap of the cooling pad portion. The method according to claim 1,
The frame unit includes:
An upper cover connected to the cooling water supply unit and having a cooling water injection pipe for spraying moisture to the cooling pad unit; And
And a lower cover having a trough through which the water absorbed by the cooling pad portion and the scatter preventive pad portion is drained. 6. The method of claim 5,
The cooling water supply unit
A water supply line connected to the cooling water injection pipe to supply water; And
And a drain line connected to the trough for processing water to be drained. delete A filter house installed at an inlet of a gas turbine into which air flows; And
And an intake air cooling module installed inside the filter house for cooling the air sucked into the compressor of the gas turbine,
The intake air cooling module includes:
A frame part having an air inflow part and an air outflow part and having a hollow for communicating the air inflow part and the air outflow part;
A cooling pad unit mounted on the air inlet side of the frame unit and connected to a cooling water supply unit for supplying cooling water, the cooling pad unit absorbing moisture supplied from the cooling water supply unit to cool the introduced air; And
A scattering prevention pad portion mounted on the side of the air outlet portion in the frame portion and spaced apart from the cooling pad portion by a predetermined distance L to form a space portion and absorbing moisture passing through the space portion So,
The intake air cooling module is further equipped with the cooling pad portion and the scattering-preventing pad portion inside the frame portion so as to prevent moisture introduced into the space portion from being scattered to the outside through the air outlet portion, Modularized into a pad structure,
The separation distance L is set based on the flow rate and amount of the water introduced into the space portion so that the moisture introduced into the space portion can be absorbed by the scattering prevention pad portion without passing through the scattering prevention pad portion as it is And,
The frame portion may further include a first pad guide and a second pad guide for fixing a position of the cooling pad portion and the scattering-prevention pad portion so as to maintain a separation distance between the cooling pad portion and the scattering- ,
Wherein the first pad guide is provided in the space portion and is protruded in a direction toward the hollow portion so that the surface of the cooling pad portion facing the space portion is restricted so that the movement of the cooling pad portion toward the space portion is restricted,
The second pad guide is provided in the space portion so as to be spaced apart from the first pad guide and is protruded in the direction toward the hollow portion so that movement of the shatterproof pad portion toward the space portion is restricted, And a surface facing the space is hooked on the gas turbine inlet air cooling system. 9. The method of claim 8,
Wherein the intake air cooling module is installed in a plurality of stacked layers in at least one of a longitudinal direction and a transverse direction inside the filter house.

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