KR101712741B1 - Apparatus and method for indirect evaporative cooling - Google Patents

Abstract

Disclosed are an indirect evaporative cooling apparatus and a method. The indirect evaporative cooling apparatus comprises: a first dry channel introducing outside air to be cooled, and supplying the cooled outside air indoors; a second dry channel primarily cooling exhaust discharged from the inside; and a wet channel connected to the second dry channel, secondarily cooling the primarily cooled exhaust, and discharging the secondarily cooled exhaust to the outside. The first dry channel and the wet channel are arranged to be adjacent to each other through a partition wall, and outside air is cooled by the secondarily cooled exhaust.

Description

[0001] Apparatus and method for indirect evaporative cooling [0002]

The present invention relates to an indirect evaporative cooling apparatus and method.

In recent years, we have been working to develop and commercialize energy saving and carbon emission reduction technologies in almost all industries. Especially, in the building sector, which accounts for more than 30% of the total energy consumption in Korea, we will reduce the energy consumed by ventilation and heating and cooling to develop a high-efficiency and high-performance system that can drastically reduce GHG emissions in the building sector. We are working hard.

As a part of this, various advanced countries in North America and Europe actively carry out researches on pollution free cooling system that uses only the latent heat of evaporation of water to supply cooling air. Therefore, Korea has recently been promoting environmental conservation and energy conservation There is a growing interest in pursuing eco-friendly cooling systems.

Evaporation of water The cooling system using latent heat has been regarded as a system that can only be used in a European or dry climate region where the temperature of the summer is high but the humidity is relatively low. However, when the indirect evaporative cooling method in which the air supplied to the air supply side and the water sprayed for evaporative cooling do not directly contact with each other is used, economical cooling effect can be obtained even in a hot and humid climate region such as Korea Cooling system using evaporative cooling has attracted attention.

In addition, when a cooling system using evaporative cooling is further combined with a dehumidifying rotor, the cooling effect is further improved, the carbon emission is reduced through reduction of energy consumption, and water which does not cause environmental destruction unlike conventional refrigerants is used , The research and development on cooling system using latent heat of evaporation will gain more strength in the future.

FIG. 1 is a view showing an operation concept of a conventional indirect evaporative cooling apparatus, and FIG. 2 is a view showing an operation concept of a conventional regenerative evaporative cooling apparatus.

Referring to FIG. 1, a conventional indirect evaporative cooling device introduces exhaust air (RA) or outside air discharged from a room into a wet channel in order to cool an outside air OA introduced into a dry channel. The conventional indirect evaporative cooling apparatus has a simple structure and can be used for recovering waste heat in cold weather or in winter when compared to room air. However, when introducing outside air into a wet channel, There is a problem that the cooling efficiency is rapidly lowered. In order to solve this problem, as shown in FIG. 2, a regenerative evaporative cooling apparatus has been developed in which the outside air of the cooled dry channel is introduced into a part of the wet channel to increase the cooling efficiency.

However, in the conventional regenerative evaporative cooling apparatus, it is necessary to dehumidify the outside air first and then introduce it in order to ensure sufficient cooling efficiency and cooling amount in the summer when the outside air is very humid. At this time, There is a problem that the volume of the cooling system becomes large and part of the energy used for dehumidification is discarded and energy is wasted.

On the other hand, the conventional indirect evaporative cooling apparatus can be used for recovering waste heat like a sensible heat exchanger without spraying water on the wet channel in the winter or during the winter. However, the conventional regenerative evaporative cooling apparatus has a disadvantage in that it can not be used during the winter or the winter because there is no part for introducing exhaust gas.

In order to compensate for the disadvantages of the conventional indirect evaporative cooling device and the regenerative evaporative cooling device, the present invention utilizes the exhaust gas discharged from the room to partially discharge the outside air introduced into the dry channel as in the conventional regenerative evaporative cooling device The present invention proposes an indirect evaporative cooling apparatus and method which can improve the cooling efficiency without using the evaporator and can be used during the winter or the winter.

According to an aspect of the present invention, an indirect evaporative cooling apparatus is disclosed.

The indirect evaporative cooling device according to the embodiment of the present invention includes a first dry channel for introducing and cooling outside air and supplying cooled outside air to the room, a second dry channel for first cooling the exhaust discharged from the room, And a wet channel connected to the first and second dry channels for cooling the first cooled exhaust and discharging the second cooled exhaust to the outside, wherein the first dry channel and the wet channel are disposed adjacent to each other And the outside air is cooled by the secondary cooled exhaust.

Wherein the outdoor air introduced into the first dry channel and the exhaust introduced into the second dry channel are subjected to the secondary cooling in the wet channel, And indirectly evaporated and cooled by the exhaust gas.

Wherein the first dry channel, the second dry channel and the wet channel are formed by partition walls inside a tubular body having an inner space, and at both ends of the first dry channel, an outer air inlet and an air outlet A plurality of through holes are formed at one end of the second dry channel to form an exhaust inlet and at the other end to allow air to flow through the wet channel, And an exhaust outlet are formed.

The first and second dry channels and the wetting channel are formed in the body so that the first and second dry channels and the wetting channel are divided into two spaces in the body and the contact area is maximized. And a second bulkhead separating one of the two spaces defined by the upper and lower spaces to form the first and second dry channels.

And a guide plate for guiding the exhaust so that the exhaust introduced into the wetting channel spreads throughout the wetting channel is formed inside the wetting channel.

The guide plate defines a wall in the wet channel such that the through hole is divided into an upper through hole and a lower through hole and the wet channel is divided into upper and lower portions. The part is opened.

The guide plate is formed with a plurality of through holes for allowing the water injected through the water inlet to be transferred to the exhaust passing through the lower side of the wet channel.

Wherein the indirect evaporative cooling device is a device for introducing cool outdoor air and warm exhaust into the first dry channel and the second dry channel respectively when operated in the winter season and during the winter season, So that the temperature of the outside air is increased by exchange of sensible heat with the first dry channel.

According to another aspect of the present invention, an indirect evaporative cooling apparatus is disclosed.

The indirect evaporative cooling apparatus according to the embodiment of the present invention includes a first module including a first dry channel, a second dry channel and a first wet channel, and a third dry channel, a fourth dry channel, and a second wet channel Wherein the first module and the second module are connected in parallel so that the first wet channel, the third dry channel and the fourth dry channel are adjacent to each other, and the first dry channel and the third dry channel The second dry channel and the fourth dry channel first cool the exhaust gas discharged from the room, and the first wet channel and the second wet channel communicate with each other, Each of which is connected to a second dry channel and a fourth dry channel, wherein the first cooled exhaust is secondarily cooled, the second cooled exhaust is discharged to the outside, and the first dry channel and the first wet channel Wherein the third dry channel and the second wet channel are disposed adjacent to each other through a partition wall, A group outside air is cooled.

According to another aspect of the present invention, there is provided an indirect evaporative cooling method performed in an indirect evaporative cooling apparatus including a first dry channel, a second dry channel and a wetting channel.

The indirect evaporative cooling method according to an embodiment of the present invention includes the steps of introducing outside air into the first dry channel and introducing exhaust discharged from the room into the second dry channel, Cooling the outside air of the first dry channel by introducing exhaust gas of the second dry channel into the wet channel, cooling the outside air of the first dry channel, and supplying the cooled outside air to the room.

Wherein the second cooling step is such that the first cooled exhaust is evaporatively cooled by water in the wet channel to be second cooled, and the first cooling of the exhaust of the second dry channel is performed by heating the second Cooling the outside air of the first dry channel by indirectly evaporating and cooling the exhaust of the second dry channel by the cold cooled exhaust, the step of cooling the outside air of the first dry channel by the second cooled exhaust in the wet channel, The outside air is indirectly evaporated and cooled.

Introducing cold outside air and warm exhaust into the first dry channel and the second dry channel, respectively, when the indirect evaporative cooling unit is operated during the snowy and winter seasons, and introducing water into the wet channel into which the warm exhaust is introduced And the temperature of the outside air is increased by exchange of sensible heat with the first dry channel without spraying.

The indirect evaporative cooling device according to the present invention is an indirect evaporative cooling device of the conventional indirect evaporative cooling device and the regenerative evaporative cooling device, It is possible to improve the cooling efficiency without discarding a part of the outside air introduced into the room, and to use it in the winter or the winter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an operation concept of a conventional indirect evaporative cooling apparatus; FIG.
2 is a view showing an operation concept of a conventional regenerative evaporative cooling apparatus;
3 is a view illustrating an operation concept of an indirect evaporative cooling apparatus according to a preferred embodiment of the present invention.
FIG. 4 and FIG. 5 illustrate a structure of an indirect evaporative cooling apparatus according to an embodiment of the present invention; FIG.
FIG. 6 is a view showing an example in which the indirect evaporative cooling device according to an embodiment of the present invention shown in FIGS. 4 and 5 is applied to a cooling system; FIG.
FIG. 7 is a flowchart showing a indirect evaporative cooling method of the indirect evaporative cooling device of FIGS. 3 to 5. FIG.
8 is a view showing a temperature measurement result according to the operation of the conventional indirect evaporative cooling device of FIG.
9 is a view showing a temperature measurement result according to the operation of the conventional regenerative evaporative cooling apparatus of FIG.
10 is a view showing a temperature measurement result according to the operation of the indirect evaporative cooling apparatus according to the embodiment of the present invention.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

3 is a view illustrating an operation concept of the indirect evaporative cooling apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the indirect evaporative cooling device introduces the outside air OA and the exhausted air RA from the room into the separated first and second dry channels, respectively, Is introduced into the room as the supply air (SA), the exhaust (RA) that has passed through the second dry channel is introduced into the wet channel, evaporated and cooled, and then discharged as the exhaust (EA).

At this time, the exhaust introduced into the second dry channel is indirectly evaporated and cooled by the exhaust introduced into the wet channel and evaporatively cooled, while passing through the second dry channel before being introduced into the wet channel. The primary cooled exhaust is introduced into the wetting channel and evaporatively cooled as described above, thereby being secondarily cooled.

Also, the outside air introduced into the first dry channel is indirectly evaporated and cooled by the exhaust introduced into the wet channel and evaporatively cooled, like the exhaust introduced into the second dry channel. Here, since the exhaust introduced into the wet channel and evaporatively cooled is, as described above, the second cooled exhaust, the outside air of the first dry channel can be cooled more strongly.

Of course, in the configuration of the apparatus, the exhaust gas is evaporated and cooled in the wet channel, whereby indirect evaporative cooling is performed in each dry channel. That is, when the secondary cooling of the exhaust gas is performed in the wetting channel, the primary cooling of the exhaust of the second dry channel and the cooling of the outside air of the first dry channel are performed.

4 and 5 are views illustrating a structure of an indirect evaporative cooling apparatus according to an embodiment of the present invention, and FIG. 6 is a schematic view of an indirect evaporative cooling apparatus according to an embodiment of the present invention shown in FIGS. 1 is a view showing an example applied to a cooling system.

Referring to FIGS. 4 and 5, the indirect evaporative cooling apparatus has a tubular body 100 having an inner space. For example, the body 100 may be formed in a rectangular tube shape, as shown in FIGS.

A first dry channel 110, a second dry channel 120 and a wetting channel 130 are formed in the inner space of the body 100. The first dry channel 110, the second dry channel 120, and the wetting channel 130 are formed in the inner space of the body 100 do.

For example, as shown in FIGS. 4 and 5, the first partition 140 is formed such that two dry channels 110 and 120 and a wetting channel 130 are formed in two spaces Shaped body 100 so that the contact area between the two channels 110 and 120 and the wetting channel 130 is maximized and the second barrier rib 150 May be formed such that one of the two spaces partitioned by the first partition 140 is divided into an upper portion and a lower portion. That is, the upper space may be the first dry channel 110, the lower space may be the second dry channel 120, and the remaining space may be the wet channel 130.

The first key channel 110 has an open shape, and at both ends of the first key channel 110, an outside air inlet 111 and an air outlet 112 are formed. Thus, the outside air is introduced into the first dry channel 110 through the open air inlet 111, indirectly evaporated and cooled by the wet channel 130 while passing through the first dry channel 110, And can be discharged through the discharge port 112 and supplied to the room.

The second dry channel 120 is formed at one end thereof with a part of the exhaust port 121 and at the other end thereof with a plurality of through holes 125 are formed. Thus, the exhaust is introduced into the second dry channel 120 through the exhaust inlet 121, indirectly evaporated and cooled by the wet channel 130 while passing through the second dry channel 120, May be introduced into the wetting channel (130) through the through hole (125).

A plurality of water inlet ports (131) and an exhaust outlet port (132) are formed in the upper part of the wet channel (130).

For example, a plurality of water inlet ports 131 and an exhaust outlet port 132 are formed in a row along the longitudinal direction of the wetting channel 130 at the upper part of the wetting channel 130, as shown in FIGS. 4 and 5 . Particularly, the exhaust outlet 132 is formed in the through-hole 125 so as to form an air flow as shown in Fig. 5 so that the exhaust introduced through the through-hole 125 is evaporatively cooled by water in the wetting channel 130. [ May be formed on the wetting channel 130 corresponding to the other end of the formed wetting channel 130.

When the water is injected through the water inlet 131, the exhaust introduced into the wet channel 130 through the through hole 125 is evaporated and cooled by reacting with the jetted water. At the same time, The exhaust of the two-gas channel 120 can be indirectly evaporated and cooled.

At this time, a guide plate 133 for guiding the exhaust is formed inside the wetting channel 130 so that the exhaust introduced into the wetting channel 130 spreads evenly throughout the wetting channel 130.

5, the guide plate 133 includes a guide channel 133 and a guide channel 133 so that the through hole 125 is divided into the upper through hole 135 and the lower through hole 136 and the wet channel 130 is divided into upper and lower portions. 130 and one end of the guide plate 133 may be opened so that upper and lower portions of the wetting channel 130 are communicated with each other. Therefore, the exhaust introduced into the wetting channel 130 through the through hole 125 is guided by the guide plate 133 and is divided into the upper side and the lower side on the wetting channel 130 and flows into the exhaust outlet 132 . At this time, the exhaust flowing from the lower side flows through the open portion of the guide plate 133 and can be discharged to the exhaust outlet 132.

A plurality of through holes 134 may be formed in the guide plate 133 to allow the water injected through the water inlet 131 to be transmitted to the exhaust passing through the lower side of the wet channel 130. Through the through holes 134, water is also sprayed to the exhaust passing through the lower side, so that evaporative cooling can take place.

Thus, the exhaust introduced into the wet channel 130 is evaporated and cooled, and then discharged to the outside through the exhaust outlet 132 in a state of high temperature and high humidity.

When this indirect evaporative cooling apparatus is applied to a cooling system, as shown in FIG. 6, a plurality of indirect evaporative cooling apparatuses can be applied to a cooling system in a connected state. That is, a plurality of indirect evaporative cooling units may be connected in parallel so that the wet channel 130 of the indirect evaporative cooling unit and the dry channels 110 and 120 of the indirect indirect evaporative cooling unit are adjacent to each other.

On the other hand, the indirect evaporative cooling system can be operated in both the winter season and the winter season in a manner similar to that described above. For example, the indirect evaporative cooling device introduces the cold outside air and the warm exhaust into the first dry channel 110 and the second dry channel 120, respectively, and then exhausts the exhaust through the wet channel 130 At this time, by exchanging only the sensible heat with the first dry channel 110 without spraying water in the wet channel 130, the ambient air can recover the waste heat of the exhaust. As a result, the indirect evaporative cooling apparatus can increase the temperature of the outside air and consequently reduce the heating energy due to the introduction of the cold outside air during the winter season and the winter season.

Fig. 7 is a flowchart showing a indirect evaporative cooling method of the indirect evaporative cooling device of Figs. 3 to 5. Fig.

In the step S710, the indirect evaporative cooling device introduces outside air into the first dry channel 110 and introduces the exhaust into the second dry channel 120. [

In the step S720, the indirect evaporative cooling device firstly cools the exhaust of the second dry channel 120 to the evaporatively cooled exhaust in the wet channel 130. [ That is, the exhaust gas of the second dry channel 120 is indirectly evaporated and cooled by the exhaust gas that is evaporatively cooled in the wet channel 130.

In the step S730, the indirect evaporative cooling device introduces the exhaust gas of the second dry channel 120 into the wet channel 130 to cool it secondarily. That is, the exhaust introduced into the wetting channel 130 is evaporatively cooled by water. At this time, the exhaust gas is evaporated and cooled in the wet channel 130, and indirect evaporative cooling is performed in the respective dry channels 110 and 120

In step S740, the indirect evaporative cooling device cools the outside air of the first dry channel 110 with the second cooled exhaust. That is, the outside air of the first dry channel 110 is indirectly evaporated and cooled by the exhaust which is evaporatively cooled in the wet channel 130.

In step S750, the indirect evaporative cooling device supplies the cooled outside air to the room.

FIG. 8 is a view showing a temperature measurement result according to the operation of the conventional indirect evaporative cooling device of FIG. 1, FIG. 9 is a view showing a temperature measurement result according to the operation of the conventional regenerative evaporative cooling device of FIG. FIG. 10 is a view showing a temperature measurement result according to the operation of the indirect evaporative cooling apparatus according to the embodiment of the present invention. Hereinafter, an indirect evaporative cooling device according to an embodiment of the present invention and a conventional evaporative cooling device will be described with reference to FIGS. 8 to 10. FIG. 8 to 10, T represents dry bulb temperature, RH represents relative humidity, DP represents dew point temperature, and WB represents wet bulb temperature.

The conventional indirect evaporative cooling device can cool the outside air supplied to the room only up to the wet bulb temperature of the exhaust introduced into the wet channel. Thus, as shown in Fig. 8, the maximum cooling temperature of the outside air can be the wet bulb temperature of the exhaust (18.7 deg. C). However, since the outside air supplied to the room has a temperature of 23 ° C, it exceeds the temperature of 11 to 16 ° C, which is the temperature of the air supply used in a general air conditioning system, so that the conventional indirect evaporative cooling apparatus has a limit.

On the other hand, the conventional indirect evaporative cooling apparatus can perform the function of warming the outside air by sensible heat exchange between the cold outside air and the warm exhaust air without spraying water from the wet channel during the winter season and the winter season. This is a method that can not be used in the conventional regenerative evaporative cooling apparatus of FIG.

Referring to FIG. 9, since the conventional regenerative evaporative cooling apparatus introduces the supply air (SA) discharged after the outside air is cooled into the wet channel, the outside air can be cooled to the wet bulb temperature (15.3 ° C) It is possible to cool the outside air to a temperature lower than that of the indirect evaporative cooling apparatus of the second embodiment. However, since the conventional regenerative evaporative cooling apparatus uses a part of the air supply unit, the size of the air is increased. In the case of a wet summer season (for example, when the temperature and humidity of the outside air are higher than 32 캜 and higher than 35% The dehumidifying air needs to be dehumidified and the dehumidified outside air is cooled, and then a part of the dehumidified air is discharged to the outside through the wet channel, resulting in waste of energy. In addition, as described above, there is also a disadvantage that it can not be used during the winter and during the winter without cooling.

The indirect evaporative cooling apparatus according to an embodiment of the present invention utilizes the exhaust as in the conventional indirect evaporative cooling apparatus of FIG. 1, and performs the primary cooling in the exhaust-gas channel as in the conventional regenerative evaporative cooling apparatus of FIG. And then introduced into the wet channel to perform secondary cooling.

Referring to FIG. 10, the exhaust and the outside air are introduced into respective dry channels, and sensible heat is cooled by indirect evaporative cooling. Here, when the exhausted air (RA) cooled in the dry channel is introduced into the wetting channel, the exhausted air RA2 introduced into the wetting channel is cooled down to 18 占 폚 and the wetting temperature of the exhausted air RA2 introduced into the wetting channel It is possible to cool the supply air.

Therefore, the indirect evaporative cooling device according to the embodiment of the present invention can overcome the discontinuity of the supply air, which is a limit of the regenerative evaporative cooling device, and can exhibit the cooling performance corresponding to the regenerative evaporative cooling device, Such as an indirect evaporative cooling device of the present invention, it is possible to heat the outside air using the exhaust during the winter and during the winter.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: Body
110: 1st channel
111: outside air inlet
112: Supply air outlet
120: 2nd channel
121: Exhaust inlet
125: Through hole
130: Wet channel
131: Water inlet
132: exhaust outlet
140, 150:

Claims (12)

In an indirect evaporative cooling apparatus,
A first gun channel for introducing and cooling outside air and supplying the cooled outside air to the room;
A second dry channel for first cooling the exhaust gas discharged from the room; And
A wet channel connected to the second dry channel for cooling the primary cooled exhaust and discharging the secondary cooled exhaust to the outside,
Wherein the first dry channel and the wetting channel are disposed adjacent to each other through a partition wall, the outside air is cooled by the second cooled exhaust,
Wherein the indirect evaporative cooling device is a device for introducing cool outdoor air and warm exhaust into the first dry channel and the second dry channel respectively when operated in the winter season and during the winter season, Wherein the temperature of the outside air is increased by exchanging sensible heat with the first dry channel without spraying the first dry channel.
The method according to claim 1,
Wherein the primary cooled exhaust is evaporatively cooled by water in the wetting channel to be secondarily cooled,
Wherein the outside air introduced into the first dry channel and the exhaust introduced into the second dry channel are indirectly evaporated and cooled by the secondary cooled exhaust in the wet channel.
The method according to claim 1,
The first dry channel, the second dry channel, and the wet channel are defined by partition walls in a tubular body having an internal space,
At both ends of the first dry channel, an outside air inlet and an air outlet are formed,
A plurality of through holes are formed in the other end of the second dry channel to allow air to flow through the wet channel,
And a plurality of water inlet ports and an exhaust outlet port are formed in the upper part of the wet channel.
The method of claim 3,
Wherein,
A first partition wall formed in the longitudinal direction of the body so that the first and second dry channels and the wet channel are divided into two spaces inside the body and a contact area is maximized; And
And a second partition wall separating one of the two spaces partitioned by the first partition wall into an upper part and a lower part to form the first and second dry channels.
The method of claim 3,
Wherein a guide plate for guiding the exhaust gas is formed in the wet channel so that the exhaust introduced into the wet channel is uniformly distributed throughout the wet channel.
6. The method of claim 5,
The guide plate defines a wall in the wet channel such that the through hole is divided into an upper through hole and a lower through hole and the wet channel is divided into upper and lower portions. And the second evaporator cooling unit is opened.
The method according to claim 6,
Wherein the guide plate is formed with a plurality of through holes for allowing the water injected through the water inlet to be transmitted to the exhaust passing through the lower side of the wet channel.
delete In an indirect evaporative cooling apparatus,
A first module including a first dry channel, a second dry channel and a first wet channel; And
A second module including a third key channel, a fourth key channel, and a second wet channel,
The first module and the second module
Wherein the first wet channel, the third dry channel and the fourth dry channel are connected in parallel so as to be adjacent to each other,
The first and third dry channels are cooled by introducing ambient air, and the cooled ambient air is supplied to the room,
The second dry channel and the fourth dry channel first cool the exhaust gas discharged from the room,
Wherein the first wet channel and the second wet channel are connected to a second dry channel and a fourth dry channel, respectively, wherein the first cooled exhaust is secondarily cooled, the second cooled exhaust is discharged to the outside,
Wherein the first dry channel, the first wet channel, the third dry channel and the second wet channel are disposed adjacent to each other through a partition wall, the ambient air is cooled by the secondary cooled exhaust,
Wherein the indirect evaporative cooling device introduces cold outside air to the first dry channel and the third dry channel when operated during the winter season and during the winter season and introduces warm exhaust into the second dry channel and the fourth dry channel The temperature of the outside air is increased by exchanging heat with the first dry channel and the third dry channel without spraying water from the first wet channel and the second wet channel into which the warm exhaust is introduced, Indirect evaporative cooling device.
1. An indirect evaporative cooling method performed in an indirect evaporative cooling apparatus comprising a first dry channel, a second dry channel and a wetting channel,
Introducing outside air into the first dry channel and introducing exhaust discharged from the room into the second dry channel;
First cooling the exhaust of the second dry channel;
Introducing the exhaust gas of the second dry channel into the wet channel to perform secondary cooling;
Cooling the outside air of the first dry channel; And
And supplying the cooled outside air to the room,
When the indirect evaporative cooling device is operated during the winter season and the winter season,
Introducing cold outside air and warm exhaust into the first dry channel and the second dry channel, respectively; And
And increasing the temperature of the outside air by sensible heat exchange with the first dry channel without spraying water from the wet channel into which the warm exhaust is introduced.
11. The method of claim 10,
Wherein the secondary cooling comprises:
The primary cooled exhaust is evaporatively cooled by water in the wetting channel to be secondarily cooled,
The step of first cooling the exhaust gas of the second dry channel includes:
The exhaust of the second dry channel is indirectly evaporated and cooled by the second cooled exhaust in the wetting channel,
Wherein cooling the outside air of the first dry channel comprises:
And indirectly evaporating and cooling the outside air of the first dry channel by the second cooled exhaust in the wetting channel.


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