CN116428138A - Wind turbine integrated heat exchange nacelle cover and wind turbine cooling system - Google Patents

Abstract

The invention proposes a wind turbine integrated heat exchange nacelle cover and a wind turbine heat dissipation system, wherein the wind turbine integrated heat exchange nacelle cover includes a shell, an internal heat-absorbing pipe and an external heat-dissipating pipe. The heat-absorbing pipe is arranged on the inner surface of the shell, and the external heat-dissipating pipe is arranged on the outer surface of the shell. The internal heat-absorbing pipe is connected with the external heat-dissipating pipe to form a circulation channel. Coolant flows in the circulation channel, and the coolant flows through the internal The heat-absorbing pipe absorbs the heat in the inner cavity and then flows into the external heat-dissipating pipe, and then flows back to the internal heat-absorbing pipe after dissipating heat through the external heat-dissipating pipe. The present invention utilizes the characteristics of the large outer surface area of the nacelle cover, and improves the heat dissipation efficiency by arranging an external heat dissipation pipe on the outer surface of the nacelle cover; at the same time, it also reduces the use of cooling fans and reduces the failure rate of the wind turbine; and the nacelle cover itself It is only the shell of the wind turbine, which does not take up space, and also saves the limited space inside the nacelle.

Description

Wind turbine integrated heat exchange nacelle cover and wind turbine cooling system

technical field

The invention relates to the technical field of wind power generation, in particular to a wind turbine integrated heat exchange nacelle cover and a wind turbine cooling system.

Background technique

Wind power refers to the conversion of wind kinetic energy into electrical energy. Wind energy, as a clean and renewable energy, has huge reserves and has been paid more and more attention by countries all over the world.

With the further development of wind power generation, the power of wind turbines used in wind power generation is also increasing, and the heat dissipation requirements of the units are also increasing. The outermost casing of the wind turbine used in wind power generation is the nacelle cover. The traditional cooling solution for the nacelle mainly dissipates the heat collected by the water-cooled pump to the outside of the nacelle cover through the combination of cooling fans and cooling plates. With the improvement of the heat dissipation requirements of the cabin, the number of fans required will also increase, and too many cooling fans will occupy the limited space in the cabin, and there are resonance problems between fans and between fans and the cabin cover , is difficult to solve. At the same time, the use of cooling fans is costly, wastes electric energy, and has a high failure rate. The plate radiator used has higher requirements for brazing and requires regular cleaning and maintenance.

The above heat dissipation problems are not conducive to reducing the design cost and maintenance frequency of wind turbines, especially offshore wind turbines.

Contents of the invention

Aiming at the problem that the heat dissipation requirement of the current wind turbine cannot be satisfied by using the traditional heat dissipation fan and heat dissipation plate, the invention proposes a wind turbine integrated heat exchange nacelle cover and a wind turbine heat dissipation system.

In the first aspect, the present invention first proposes a wind turbine integrated heat exchange nacelle cover, which includes a shell, an internal heat-absorbing pipe, and an external heat-dissipating pipe. The shell is provided with an inner cavity, and the internal heat-absorbing pipe is provided On the inner surface of the housing, the external heat dissipation pipe is arranged on the outer surface of the housing, the internal heat absorption pipe communicates with the external heat dissipation pipe and forms a circulation channel, and the circulation channel flows Cooling liquid, the cooling liquid flows through the internal heat-absorbing pipe and absorbs heat in the inner cavity, then flows into the external heat-dissipating pipe, and flows back to the internal heat-absorbing pipe after dissipating heat through the external heat-dissipating pipe.

Preferably, the external heat dissipation pipe includes a pipe body and heat dissipation bosses, the heat dissipation bosses are arranged at intervals on the outer surface of the pipe body, and the heat dissipation bosses are arranged at intervals along the axis of the pipe body Multiple.

Preferably, the heat dissipation boss is set as a sheet metal part.

Preferably, an anti-corrosion layer is provided on the outer surface of the pipe body and the heat dissipation boss.

Preferably, the external heat dissipation pipes and the internal heat absorption pipes are both arranged in an S shape on the surface of the housing.

In the second aspect, the present invention also proposes a wind turbine cooling system, which includes the above-mentioned wind turbine integrated heat exchange nacelle cover, and also includes a water-cooled pump, the water-cooled pump has a water inlet and a water outlet, and the water inlet is connected to a The internal heat-absorbing pipe, the water outlet is connected to the external heat-dissipating pipe, and the water-cooling pump can pump the cooling liquid in the internal heat-absorbing pipe into the external heat-dissipating pipe.

Preferably, a rear frame is fixed on the lower inner surface of the casing, and the water cooling pump is fixed to the rear frame.

Preferably, the rear frame is also fixed with a generator, and a first connecting pipe is connected between the generator and the water inlet of the water-cooled pump, and the coolant flows through the generator and absorbs the power generated The heat of the machine enters the water-cooling pump from the first connecting pipe, and is pumped into the external cooling pipe for heat dissipation under the action of the water-cooling pump.

Preferably, it also includes a second connecting pipe and a third connecting pipe located in the inner cavity, the external heat dissipation pipe is connected to the water outlet of the water cooling pump through the second connecting pipe, and the internal suction The heat pipe is connected to the water inlet of the water cooling pump through the third connecting pipe.

Preferably, the internal heat-absorbing pipe is fixed to the inner surface of the upper end of the housing.

The beneficial effects of the present invention are:

The technical scheme of the present invention makes full use of the characteristics of large outer surface area of the nacelle cover, and improves the heat dissipation efficiency by arranging an external heat dissipation pipe on the outer surface of the nacelle cover; at the same time, it also reduces the use of cooling fans and reduces the failure rate of the wind turbine ; and the nacelle cover itself is only a shell of the wind turbine, does not take up space, and also saves the limited space inside the nacelle.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a three-dimensional structural schematic diagram of the heat dissipation system of a wind turbine according to the present invention.

Fig. 2 is a schematic perspective view of the three-dimensional structure of the wind turbine integrated heat exchange nacelle cover according to the present invention.

Fig. 3 is a schematic structural diagram of the external piping in the heat dissipation system of the wind turbine according to the present invention.

In the figure: 1. Shell, 2. Internal heat-absorbing pipe, 3. External heat-dissipating pipe, 4. Inner cavity, 5. Pipe body, 6. Radiating boss, 7. Water-cooling pump, 8. Rear frame, 9. Generator, 10, first connecting pipe, 11, second connecting pipe, 12, third connecting pipe.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in this specific embodiment. Obviously, the implementation described below Examples are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this patent.

Embodiment one

The nacelle is the outermost shell of the entire wind turbine. If the large outer surface area of the nacelle is fully utilized, there are no windows on the outer surface of the nacelle. The huge outer surface becomes a heat sink with excellent performance. At the same time, the tubular cooling device has a low failure rate, no need for cleaning and maintenance, and a simple structure, which can greatly reduce the cost of the unit and the frequency of maintenance.

Based on the above considerations, as shown in Fig. 2 to Fig. 3, in this embodiment, the present invention first proposes a wind turbine integrated heat exchange nacelle cover, which includes a shell 1, an internal heat-absorbing pipe 2 and an external heat-dissipating pipe 3, The interior of the shell 1 is provided with an inner cavity 4, the internal heat-absorbing pipe 2 is arranged on the inner surface of the shell 1, the external heat-dissipating pipe 3 is arranged on the outer surface of the shell 1, and the internal heat-absorbing pipe 2 communicates with the external heat-dissipating pipe 3 A circulation channel is formed, and cooling liquid flows in the circulation channel. The cooling liquid flows through the internal heat-absorbing pipe 2 and absorbs the heat in the inner cavity 4, then flows into the external heat-dissipating pipe 3, and then flows back to the internal heat-absorbing pipe after passing through the external heat-dissipating pipe 3 pipe 2. Specifically, the external heat dissipation pipe 3 can be fixed on the outer surface of the housing 1 in any effective and reliable manner, where there is no window and an external accessory can be hung. The number and arrangement density of the external heat dissipation pipe 3 can be adjusted according to the amount of heat dissipation. No restrictions. The present invention makes full use of the characteristics of large inner and outer surfaces of the housing 1, and by fixing the inner heat-absorbing pipe 2 and the outer heat-dissipating pipe 3 on the inner and outer surfaces of the housing 1, the housing 1 is covered with its huge outer surface and outer surface. The external heat dissipation pipe 3 becomes an efficient radiator, which improves the heat dissipation efficiency; at the same time, it also reduces the use of heat dissipation fans and reduces the failure rate of the wind turbine; and the nacelle cover itself is only a shell of the wind turbine, which does not occupy space. It also saves the limited space inside the cabin.

In order to further increase the heat dissipation efficiency of the external heat dissipation pipe 3, as shown in Figure 3, the external heat dissipation pipe 3 includes a pipe body 5 and a heat dissipation boss 6, and the outer surface of the pipe body 5 is provided with heat dissipation bosses 6 at intervals in the circumferential direction, and A plurality of cooling bosses 6 are arranged at intervals along the axis of the pipe body 5 . The existence of the heat dissipation boss 6 can increase the heat dissipation area of the external heat dissipation pipe 3 and improve the heat dissipation area. Wherein, the external heat dissipation pipe 3 can be made of any metal with good thermal conductivity, and the heat dissipation boss 6 can be set as a sheet metal part and Any metallic material that conducts heat well.

The outer surfaces of the pipe body 5 and the heat dissipation boss 6 are both provided with an anti-corrosion layer. The pipe body 5 and the heat dissipation boss 6 outside the pipe can be anti-corrosion, moisture-proof and salt spray-proof in any effective way.

As shown in FIG. 1 , the external heat dissipation pipes 3 and the internal heat absorption pipes 2 are arranged in an S shape on the surface of the housing 1 . The S-shaped arrangement can further increase the length of the external heat dissipation pipe 3 and the internal heat absorption pipe 2, and indirectly increase the heat absorption and heat dissipation area.

Embodiment two

As shown in Figure 1, the present invention also proposes a wind turbine heat dissipation system, which includes the above-mentioned wind turbine integrated heat exchange nacelle cover, and also includes a water-cooled pump 7, the water-cooled pump 7 has a water inlet and a water outlet, and the water inlet is connected to an internal The heat-absorbing pipe 2 and the water outlet are connected with an external heat-dissipating pipe 3 , and the water-cooling pump 7 can pump the coolant in the internal heat-absorbing pipe 2 into the external heat-dissipating pipe 3 . A rear frame 8 is fixed on the lower inner surface of the casing 1 , and the water cooling pump 7 is fixed on the rear frame 8 .

In addition to the water-cooled pump 7, the rear frame 8 is also fixed with a generator 9 and a gear box. A first connecting pipe 10 is connected between the generator 9 and the water inlet of the water-cooled pump 7, and the coolant flows through the power generator. Engine 9 and absorbs the heat of generator 9 and enters water-cooling pump 7 from first connection pipe 10, and is pumped into external cooling pipe 3 to dissipate heat under the effect of water-cooling pump 7. Therefore, the heat inside the generator 9 can be input into the water-cooling pump 7 through the first connecting pipe 10 and enter the external cooling pipe 3 through the water-cooling pump 7 so as to be dissipated to the external environment.

As shown in Figure 1, it also includes a second connecting pipe 11 and a third connecting pipe 12 located in the inner cavity 4, the external heat dissipation pipe 3 is connected to the water outlet of the water-cooling pump 7 through the second connecting pipe 11, and the internal heat-absorbing pipe 2 It is connected with the water inlet of the water cooling pump 7 through the third connecting pipe 12 .

Since the hot air in the cavity 4 generally moves toward the top of the cavity 4, in order to make the internal heat-absorbing pipeline 2 better absorb the heat in the air in the cavity 4, the internal heat-absorbing pipeline 2 is fixed on the shell 1 the inner surface of the upper end.

The working principle of the cooling system of the wind turbine is as follows:

The internal heat-absorbing pipe 2 is located at the top of the housing 1 and is connected to the water-cooling pump 7 on the rear frame 8. The internal heat-absorbing pipe 2 collects the heat in the environment of the housing 1 and transfers the heat with the internal heat-absorbing pipe 2. The coolant circulates to the water-cooling pump 7, and the heat is transferred to the water-cooling pump 7 installed on the rear frame 8. The water-cooling pump 7 circulates heat to a large number of external heat dissipation pipes 3 in the integrated heat exchanger cabin cover, and the heat dissipation bosses 6 of the external heat dissipation pipes 3 will increase the heat dissipation area of the pipe body 5 and dissipate the heat of the cavity 4 into the atmosphere .

And the heat of the large parts (generator 9 and gear box and other structures) in the nacelle and the ambient heat in the cavity 4 are circulated to the water-cooled pump 7 installed in the rear frame 8, and the heat is transferred to the water-cooled pump installed in the rear frame 8. Pump 7. The water-cooling pump 7 circulates heat to a large number of external heat dissipation pipes 3 in the integrated heat exchanger cabin cover, and the heat dissipation bosses 6 of the external heat dissipation pipes 3 will increase the heat dissipation area of the pipe body 5 and dissipate the heat of the cavity 4 into the atmosphere .

As can be seen from the foregoing embodiments, the beneficial effects of the present invention are:

The technical scheme of the present invention makes full use of the characteristics of large outer surface area of the nacelle cover, and improves the heat dissipation efficiency by arranging an external heat dissipation pipe on the outer surface of the nacelle cover; at the same time, it also reduces the use of cooling fans and reduces the failure rate of the wind turbine ; and the nacelle cover itself is only a shell of the wind turbine, does not take up space, and also saves the limited space inside the nacelle.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A wind turbine integrated heat exchange nacelle cover, characterized in that it includes a shell, an internal heat-absorbing pipe and an external heat-dissipating pipe, the inside of the shell is provided with an inner cavity, and the internal heat-absorbing pipe is arranged on the The inner surface of the housing, the external heat dissipation pipe is arranged on the outer surface of the housing, the internal heat absorption pipe communicates with the external heat dissipation pipe and forms a circulation channel, and cooling liquid flows in the circulation channel, The coolant flows through the internal heat-absorbing pipe and absorbs heat in the inner cavity, then flows into the external heat-dissipating pipe, and flows back to the internal heat-absorbing pipe after dissipating heat through the external heat-absorbing pipe. 2. The wind turbine integrated heat exchange nacelle cover according to claim 1, characterized in that, the external heat dissipation pipe includes a pipe body and a heat dissipation boss, and the outer surface of the pipe body is provided with the heat dissipation pipe at intervals in the circumferential direction. bosses, and a plurality of heat dissipation bosses are arranged at intervals along the axis of the pipe body. 3. The nacelle cover of wind turbine integrated heat exchange according to claim 2, characterized in that, the heat dissipation boss is set as a sheet metal part. 4 . The wind turbine integrated heat exchanger nacelle cover according to claim 2 , wherein an anti-corrosion layer is provided on the outer surface of the pipe body and the heat dissipation boss. 5 . 5 . The wind turbine integrated heat exchange nacelle cover according to claim 1 , wherein the external heat dissipation pipes and the internal heat absorption pipes are both arranged in an S shape on the surface of the casing. 6 . 6. A heat dissipation system for a wind turbine, comprising the wind turbine integrated heat exchange nacelle cover according to any one of claims 1 to 5, characterized in that it also includes a water-cooled pump, the water-cooled pump has a water inlet and a water outlet, the The water inlet is connected to the internal heat-absorbing pipe, the water outlet is connected to the external heat-dissipating pipe, and the water-cooling pump can pump the coolant in the internal heat-absorbing pipe into the external heat-dissipating pipe. 7 . The heat dissipation system for wind turbines according to claim 6 , wherein a rear frame is fixed on the lower inner surface of the casing, and the water-cooling pump is fixed on the rear frame. 8 . 8. The heat dissipation system for wind turbines according to claim 7, wherein a generator is also fixed on the rear frame, and a first connection is connected between the generator and the water inlet of the water cooling pump. The coolant flows through the generator and absorbs the heat of the generator, and then enters the water-cooling pump from the first connecting pipe, and is pumped into the external cooling pipe under the action of the water-cooling pump for cooling. Heat dissipation. 9. The heat dissipation system for wind turbines according to claim 7, further comprising a second connecting pipe and a third connecting pipe located in the inner cavity, and the external heat dissipation pipe connects with the second connecting pipe through the second connecting pipe. The water outlet of the water-cooled pump is connected, and the internal heat-absorbing pipe is connected with the water inlet of the water-cooled pump through the third connecting pipe. 10 . The heat dissipation system for wind turbines according to claim 7 , wherein the internal heat absorption pipe is fixed to the inner surface of the upper end of the housing. 11 .

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