KR20160010805A - Free cooling system with absorption chiller - Google Patents

Abstract

Disclosed is an outdoor air cooling system using an absorption refrigerator. The outdoor air cooling system using the absorption refrigerator includes: an evaporator which is formed in an airtight container including an evaporator storage tank inside, and cools a chilled water coil located therein by generating coolant steam; an absorber which is linked to the evaporator, and is formed with the airtight container accommodating an absorption solution absorbing the coolant steam; a regenerator which regenerates the absorption solution by vaporizing the coolant by heating the absorption solution which is diluted by absorbing the coolant steam from the absorber; a condenser inlet which is inputted with the coolant vaporized in the regenerator; a condenser which condenses the coolant inputted through the condenser inlet and discharges the condensed coolant through a condenser outlet; a cooling water supply part which supplies cooling water to cool absorption heat generated in the absorber; a coolant collection pipe which supplies the coolant discharged from the condenser outlet to the evaporator storage tank; a coolant circulation pipe which supplies the coolant stored in the evaporator storage tank to an evaporation spray located in the evaporator; a coolant branching pipe which connects the condenser outlet and the coolant circulation pipe; a first opening/closing valve which is installed on the coolant branching pipe; a second coolant connection pipe which connects the condenser inlet and the coolant collection pipe; and a third opening/closing valve which is installed on the second coolant connection pipe. Therefore, the outdoor air cooling system can increase cooling efficiency, by performing cooling using the outdoor air when a low load is applied, and can reduce manufacturing costs and space by eliminating the use of an additional heat exchanger to use the outdoor air.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling system using an absorption chiller,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system, and more particularly, to an outside air cooling system using an absorption type refrigerator including an absorption type refrigerator.

The cooling system refers to a system for cooling the load side by cooling and supplying cold water supplied to a load side requiring cooling by using a refrigerator.

Absorption refrigerators are a regenerator that regenerates the dilute solution with a concentrated solution, a condenser that condenses the refrigerant vapor, and an evaporator that evaporates the refrigerant liquid. And is a refrigerator that produces cold water using hot water of a hot water or a medium temperature water supplied from a heat source.

The generator absorbs the condensed absorption liquid produced by heating the diluted absorption liquid introduced from the absorber and discharges the produced condensed absorption liquid to the absorber. The condenser condenses heat exchange of the refrigerant vapor introduced from the regenerator through the cooling medium, And the evaporator discharges the refrigerant liquid into the gaseous state while dispersing the refrigerant liquid into the evaporator and absorbs the latent heat of vaporization required for evaporation from the refrigerant (cold water) and cools the refrigerant to cool the refrigerant.

In recent years, there has been an increase in the number of air-conditioning buildings due to the cooling load during the four seasons, such as Internet data center (IDC), mobile communication switching center, computer center, large department store, Accordingly, there is an increasing demand for air conditioning in the middle season between the winter season where the outdoor air temperature is low and between the winter season and the summer season.

However, since the cooling load generated in the building can be reduced as the outside air temperature lowers, and the cooling load factor of the refrigerator and the cooling tower designed for the cooling load of the summer can be reduced, It is possible to perform cooling even when cold water at a temperature (approximately 8 to 10 ° C) higher than the normal cold water temperature (7 ° C) is supplied.

The term "free cooling system" refers to a system that cools cold water by using low-temperature outside air in a cooling operation environment in a low-temperature outside-season season. It replaces the cold water production of the freezer in low- Cooling system that uses cold water produced as a cooling medium for cooling.

Korean Patent No. 10-1341790 (hereinafter referred to as " Prior Art 1 ") discloses an outside air cooling system using an absorption type refrigerator. However, in the prior art 1, a separate outdoor-air cold water heat exchanger must be provided in order to cool air using the outside air during the low-temperature outside season, which increases the manufacturing cost and occupies a large space.

1. Korean Patent No. 10-1341790 (Ultra E.S type compression chiller and absorption chiller, issued on December 31, 2013)

The embodiments of the present invention have been devised to solve the problems as described above, and it is an object of the present invention to provide an air conditioner that not only improves the cooling efficiency by cooling by using outside air at a low load time but also includes a separate heat exchanger The manufacturing cost can be reduced and the space can be saved.

In order to solve the above-described problems, an embodiment of the present invention provides an evaporator comprising: an evaporator formed of a closed vessel including an evaporator water tank therein to cool a cold water coil located inside the evaporator; An absorber communicating with the evaporator, the absorber being formed of a hermetically sealed container for containing the absorption liquid absorbing the refrigerant vapor; A regenerator for absorbing the refrigerant vapor in the absorber to heat the diluted absorption liquid to vaporize the refrigerant to regenerate the concentrated absorption liquid; A condenser inlet through which the refrigerant evaporated in the regenerator flows, a condenser which condenses the refrigerant introduced through the condenser inlet and discharges the condensed refrigerant through an outlet of the condenser; A cooling water supply unit for supplying cooling water for cooling the absorption heat generated in the absorber; A refrigerant recovery pipe for supplying the refrigerant discharged from the condenser outlet to the evaporator water storage tank; A refrigerant circulation pipe for supplying the refrigerant stored in the evaporator water tank to an evaporation spray located inside the evaporator; A refrigerant branch pipe connecting the condenser outlet and the refrigerant circulation pipe; A first opening / closing valve installed in the refrigerant branch pipe; A second refrigerant connection pipe connecting the condenser inlet and the refrigerant recovery pipe; And a third on-off valve installed in the second refrigerant connection pipe.

The refrigerant pipe may further include a second opening / closing valve installed between the refrigerant branch pipe and the connecting portion of the refrigerant recovery pipe and the second refrigerant connecting pipe.

According to another aspect of the present invention, there is provided a refrigerator comprising: an evaporator formed of a closed container including an evaporator water tank therein to cool a cold water coil disposed inside the evaporator; An absorber communicating with the evaporator, the absorber being formed of a hermetically sealed container for containing the absorption liquid absorbing the refrigerant vapor; A regenerator for absorbing the refrigerant vapor in the absorber to heat the diluted absorption liquid to vaporize the refrigerant to regenerate the concentrated absorption liquid; A condenser inlet through which the refrigerant evaporated in the regenerator flows, a condenser which condenses the refrigerant introduced through the condenser inlet and discharges the condensed refrigerant through an outlet of the condenser; A cooling water supply unit for supplying cooling water for cooling the absorption heat generated in the absorber; A refrigerant recovery pipe for supplying the refrigerant discharged from the condenser outlet to the evaporator water storage tank; A refrigerant circulation pipe for supplying the refrigerant stored in the evaporator water tank to an evaporation spray located inside the evaporator; And a refrigerant branch pipe connecting the condenser inlet and the refrigerant circulation pipe; And a seventh opening / closing valve installed on the refrigerant branch pipe.

Here, it is effective to further include an eighth opening / closing valve installed between the condenser inlet and the regenerator.

Preferably, the condenser is installed in one cooling tower together with the cooling water supply unit.

The cooling tower includes a cooling tower frame having an air inlet and an air outlet, and a flow path communicating the air inlet and the air outlet is formed. A cooling fan for generating an air flow in the flow path; A cooling water heat exchanger installed on the flow path for cooling the cooling water; And a condenser refrigerant heat exchanger installed on the flow path and cooling the refrigerant introduced into the condenser.

Wherein the condenser refrigerant heat exchanger comprises: a condenser refrigerant coil through which the refrigerant circulates; A condenser spray for dispensing cooling water to the condenser refrigerant coil; And a cooling water branch pipe connecting the condenser spray and an outlet of the cooling water heat exchanger.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects.

When the cooling load is small, the cooling can be efficiently performed by using the outside air without using the regenerator and the absorber.

Also, unlike the prior art, cooling can be performed without branching a separate line from the cold water line to the cooling tower. Therefore, it is not necessary to separately provide the cooling tower with a heat exchanger for cooling the line branched from the cold water line.

Since the cold water, the cooling water and the refrigerant are not mixed at all, it is possible to prevent the cold water and the refrigerant from being contaminated by the cooling water exposed to the outside.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an outdoor cooling system using an absorption refrigerator according to a first embodiment of the present invention;
2 to 4 are schematic diagrams showing the operating relationship of the outdoor air cooling system using the absorption type refrigerator of the first embodiment of the present invention,
Fig. 2 is a graph showing the relationship between the flow rate
Fig. 3 is a graph showing the relationship between the air-
Fig. 4 is a graph
5 is a schematic diagram of an outside air cooling system using the absorption type refrigerator according to the second embodiment of the present invention.
6 to 8 are schematic diagrams showing the operating relationship of the outdoor air cooling system using the absorption type refrigerator of the second embodiment of the present invention,
Fig. 6 is a graph showing the relationship between the flow rate
Fig. 7 is a graph showing the relationship between the air-
8 is a flowchart

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

1 is a schematic diagram of an outdoor air cooling system using an absorption refrigerator according to a first embodiment of the present invention.

1, the outdoor air cooling system using the absorption type refrigerator according to the first embodiment of the present invention is formed by a closed container 110 including an evaporator water reservoir 121 therein to generate refrigerant vapor, An absorber 130 connected to the evaporator 120 and formed of a hermetically sealed vessel 110 for receiving the absorption liquid 131 absorbing the refrigerant vapor, A regenerator 200 for absorbing the refrigerant vapor in the absorber to heat the absorbed liquid 131 so as to evaporate the refrigerant to regenerate the absorbed liquid as the absorbed liquid in the regenerator 200; A condenser 300 for condensing the refrigerant introduced through the condenser inlet 302 and discharging the condensed refrigerant through the condenser outlet 302; a condenser 300 for cooling the absorption heat generated in the absorber 130; Cold for The number and a cooling water supply unit 500 for supplying.

The cold water coil 11 is connected to the side of the load 10 and the cold water cooled by the evaporator is supplied to the side of the load 10 through the cold water coil 11 to cool the load side.

The evaporator 120 includes an evaporator water storage tank 121 for storing a liquid refrigerant, an evaporation spray 122 for spraying a coolant to the cold water coil 11, and an evaporator 122 for storing the refrigerant stored in the evaporator water storage tank 121, And a refrigerant pump 124 installed on the refrigerant circulation pipe 123 and forcing the refrigerant to circulate through the refrigerant circulation pipe 123. The refrigerant circulation pipe 123 supplies the evaporation spray 122,

The closed container 110 of the evaporator 120 is maintained at a vacuum (about 6. mmHg), and the refrigerant evaporates at about 5 degrees in a vacuum state, and the cold water coil 11 is cooled by the evaporation heat. If the evaporation continues in the evaporator, the steam partial pressure becomes higher and the evaporation temperature rises, and the proper cooling capacity can not be obtained. At this time, the absorption liquid stored in the absorber 130 absorbs the refrigerant vapor, and the evaporation pressure and the evaporation temperature can be kept constant.

Although the absorber 130 is disposed in the same hermetically sealed container 110 as the evaporator 120, the absorber 130 is not limited thereto. The absorber 130 may be formed in a separate container and communicate with the hermetic container.

The absorber 130 stores an absorption liquid (for example, LiBr aqueous solution) capable of absorbing the refrigerant vapor evaporated in the evaporator. That is, the absorbing liquid is stored on the lower side of the closed container 110. To increase the absorption effect, the absorber 130 further includes an absorber spray 132 for spraying the absorbing liquid into the closed vessel 110.

Further, a cooling heat exchanger 133 is installed in the absorber to remove absorption heat generated when the refrigerant vapor is absorbed. The cooling heat exchanger 133 is connected to the cooling water supply part 500.

If the absorbing action is continued in the absorber 130, the absorbing liquid contains a large amount of refrigerant vapor, becomes thinner and can not continue the absorbing action. Therefore, in order to concentrate the diluted absorption liquid, the diluted absorption liquid is sent to the regenerator 400, which is heated to an external heat source in the regenerator and concentrated.

The absorbed liquid absorbed at the lower side of the closed vessel 110 is supplied to the regenerator 200 through the regenerator delivery line 151 whose one end is connected to the lower end side of the closed container 110 and the other end is connected to the regenerator 200 . A first solution pump 152 is provided in the regenerator delivery line 151 to supply the diluted absorption liquid to the regenerator 400 side.

The regenerator 400 heats and dilutes the diluted absorbent liquid as described above, and then the concentrated absorbent liquid is supplied to the absorber spray 132 through the absorber delivery line 153. The absorber delivery line 153 is provided with a second solution pump 154.

At this time, it is preferable that the high-temperature concentrated absorption liquid passing through the absorber delivery line 153 is cooled in the process of being transferred to the absorber spray 130, and the cooled dilute absorption liquid passing through the regenerator delivery line 151 is cooled by the regenerator 200, It is possible to further increase the efficiency. Therefore, it is preferable that the absorber delivery line 153 and the regenerator delivery line 151 are designed to be able to exchange heat with each other through a separate heat exchanger (not shown).

On the other hand, the refrigerant vapor separated from the absorption liquid in the regenerator 400 flows into the condenser inlet 301 through the condenser delivery line 311. At this time, the condenser sending line 311 and the regenerator sending line 151 requiring preheating may be configured to perform heat exchange in advance through a heat exchanger (not shown) separately provided.

It is natural that the structure of the regenerator 400 of the present invention includes the regenerator applied to the dual efficiency absorption refrigerator system divided into the high temperature regenerator and the low temperature regenerator as well as the single-use absorption refrigerator system using only one regenerator.

The condenser 300 is installed together with the cooling water supply part 500 in one cooling tower.

The cooling tower includes a cooling tower frame 501 in which an air inlet 511 and an air outlet 512 are formed and in which a flow path for communicating the air inlet and the air outlet is formed and a cooling fan And a condenser refrigerant heat exchanger (530) installed on the flow path and cooling the refrigerant introduced into the condenser, wherein the refrigerant heat exchanger (520) is installed on the flow path do.

The condenser refrigerant heat exchanger 530 includes a condenser refrigerant coil 531 through which the refrigerant circulates, a condenser spray 532 that sprays cooling water to the condenser refrigerant coil 531, the condenser spray 532, And a cooling water branch pipe 533 for connecting the outlet of the cooling water heat exchanging unit 520.

The cooling water heat exchanging part 520 includes a cooling water spray 521 for spraying cooling water to the flow path and a filler 522 for allowing the cooling water sprayed by the cooling water spray 521 to stay and exchange heat by the air flowing in the flow path.

The cooling water cooled in the cooling water heat exchanging part 520 is supplied to the cooling water heat exchanger part outlet 523 at one end and is connected to the cooling water heat exchanger 133 at the other end by a cooling water supply line 524, The cooling water is supplied to the cooling water spray 521 through the cooling water inflow line 526 connected to the cooling water heat exchanger 132 and the other end connected to the cooling water spray 521 do.

The outdoor air cooling system using the absorption type refrigerator according to the present invention includes a refrigerant recovery pipe 125 for supplying the refrigerant discharged from the condenser outlet 302 to the evaporator water storage tank 121, A first opening and closing valve 127 installed in the refrigerant branch pipe 126 and a refrigerant pipe 126 connecting the refrigerant circulating pipe 123 and the refrigerant return pipe 125 to the condenser inlet 301 and the refrigerant return pipe 125, A third opening and closing valve 129 installed in the second refrigerant connecting pipe 128 and a refrigerant pipe connecting the refrigerant branch pipe and the connecting portion 304 of the refrigerant return pipe 125. The second refrigerant connecting pipe 128, And a second on-off valve (303) installed between the second refrigerant connection pipe connection part (305).

Separately, for heating, a high-temperature refrigerant vapor inflow line 601, one end of which is connected to the condenser delivery line 311 and the other end thereof is connected to the hermetically sealed container 110, and a fourth opening / A high temperature absorbing liquid inflow line 603 connected to the absorber sending line 153 at one end and connected to the hermetically sealed container 110 and a fifth open / close valve 604 provided at the high temperature absorbing liquid inflow line 603 A refrigerant absorption liquid joining line 605 connected at one end to the evaporator water storage tank 121 and at the other end to the regenerator delivery line 151 and a sixth opening and closing valve 606 installed at the refrigerant absorption liquid joining line 605 do.

FIG. 2 is a system diagram when the cooling load is large. FIG. 3 is a schematic diagram showing a state in which the cooling load is small and the outdoor air is used when the outdoor air is used. Fig. 4 is a flowchart of heating. Fig.

In FIGS. 2 to 4, the dotted line indicates that no refrigerant, cooling water, or absorbing liquid flows, and a solid line indicates a state in which refrigerant, cooling water, or absorbing liquid flows.

First, the flow chart of the cooling load load will be described with reference to Fig. 2. The first opening / closing valve 127, the third opening / closing valve 129, the fourth opening / closing valve 602, the fifth opening / closing valve 604, And the sixth open / close valve 606 are closed, the second open / close valve 303 is opened, and the various pumps 525, 124, 152, and 154 are in an operating state.

The cooling water cooled in the cooling tower is supplied to the cooling heat exchanger 133 through the cooling water supply line 524 to cool the absorption heat and then to the cooling tower again through the cooling water inflow line 526 and cooled.

The cooling water supplied through the cooling water branch pipe 533 branched from the cooling water supply line 524 cools the evaporative condenser 300 and then circulates again.

In the closed vessel 110 on the evaporator side, the cold water coil 11 is cooled while the refrigerant evaporates, and the vaporized refrigerant vapor is absorbed into the absorbing liquid inside the closed vessel 110 on the absorber side. The refrigerant stored in the evaporator water tank 121 is supplied to the evaporation spray 122 through the refrigerant pump 124 and the refrigerant discharged from the evaporation spray 122 is evaporated to further increase the cooling efficiency.

On the other hand, the dilute absorption liquid absorbing the refrigerant vapor is supplied to the regenerator 200 through the regenerator delivery line 151 by the first solution pump 152, heated by the regenerator 200, and the refrigerant evaporates again, And the concentrated absorption liquid is supplied to the absorber 130 through the absorber spraying line 153 through the absorber spraying line 153.

The high-temperature refrigerant vapor delivered through the condenser delivery line 311 is cooled in the condenser 300 and then supplied to the evaporator water reservoir 121 again.

Finally, the cold water cooled in the cold water coil 11 inside the evaporator is supplied to the load 10 side of the room to be used for cooling, and the cold water used for cooling is again supplied to the cold water coil 11 and circulated.

As described above, the first embodiment of the present invention makes it possible to maximize the cooling by using both the absorber and the regenerator when the cooling load is large.

Referring to Fig. 3, a case where the cooling load is small, such as spring, autumn, etc., will be described.

The first on-off valve 127 and the third on-off valve 129 are open and the second on-off valve 303, the fourth on-off valve 602, the fifth on- And the sixth on-off valve 606 are closed. The cooler pump 525, the coolant pump 124 and the cooling fan 513 are in an operating state and the first solution pump 152 and the second solution pump 154 ) Stops operating.

Looking at the operating relationship, the circulation of the cooling water circulates in the same manner as in Fig. That is, the cooling water cooled in the cooling tower is recovered to the cooling tower after cooling the sealed vessel 110 through the cooling water supply line 524, and the cooling water branched through the cooling water branch pipe 533 cools the evaporation condenser 300 .

The refrigerant flowing through the evaporative condenser 300 is cooled by the cooling water and then discharged through the condenser inlet 301 and then flows through the second refrigerant connection pipe 128 and the refrigerant recovery pipe 125 to the evaporator water storage tank 121, And the refrigerant supplied to the evaporator water storage tank 121 is supplied to the evaporation spray 122 which is supplied through the refrigerant pump 124 to cool the cold water coil 11, Pipe 126, and condenser outlet 302 to the condenser and cooled again.

The cold water cooled in the cold water coil (11) is used for cooling the load (10).

Thus, when the cooling load is small, the cooling can be efficiently performed by using the outside air without using the regenerator and the absorber.

Also, unlike the prior art, cooling can be performed without branching a separate line from the cold water line to the cooling tower. Therefore, it is not necessary to separately provide the cooling tower with a heat exchanger for cooling the line branched from the cold water line.

Since the cold water, the cooling water and the refrigerant are not mixed at all, it is possible to prevent the cold water and the refrigerant from being contaminated by the cooling water exposed to the outside.

The heating operation will be described with reference to FIG.

During heating, the fourth valve 602, the fifth valve 604 and the sixth valve 606 are opened, and the first solution pump 152? And the remaining pumps are all stationary.

The refrigerant and the absorption liquid stored in the closed vessel 110 are supplied to the regenerator 200 through the refrigerant absorption liquid confluence line 605 and the regenerator delivery line 151. After the refrigerant supplied to the regenerator 200 is heated, The high-temperature absorbing liquid heated by the regenerator 200 is supplied to the absorber sending line 153, the high-temperature absorbing liquid inflow line (high-temperature absorbing liquid inflow line) 603 to the hermetically sealed container 110.

The high-temperature refrigerant vapor and the high-temperature absorbing liquid introduced into the hermetically sealed container 110 heat the cold-water coil 11 to send high-temperature cold water to the load 10 to be used for heating.

As described above, the first embodiment of the present invention can be used for cooling and heating by using an absorption type refrigerator, and it is also possible to use the outside air for cooling in a small load season without providing a separate cold water heat exchanger in the cooling tower So that the energy efficiency can be increased.

5 is a flow diagram of an outside air cooling system using the absorption type refrigerator of the second embodiment of the present invention.

5, the outdoor air cooling system using the absorption type refrigerator according to the second embodiment of the present invention is formed of a closed container 110 including an evaporator water reservoir therein to generate refrigerant vapor, An absorber 130 connected to the evaporator 120 and formed of a hermetically sealed vessel 110 for receiving an absorbing liquid for absorbing the refrigerant vapor and an evaporator 120 for cooling the evaporator 120, A regenerator 200 which absorbs the refrigerant vapor and heats the absorbed liquid and evaporates the refrigerant to regenerate the absorbed liquid as the concentrated absorption liquid; a condenser inlet 301 into which the refrigerant evaporated in the regenerator 200 flows, A condenser 300 for condensing the refrigerant introduced through the condenser inlet 301 and discharging the condensed refrigerant through the condenser outlet 302 and a cooling water for cooling the absorption heat generated in the absorber 130 A refrigerant recovery pipe 125 for supplying the refrigerant discharged from the condenser outlet 302 to the evaporator water storage tank 121 and a refrigerant recovery pipe 125 for discharging the refrigerant stored in the evaporator water storage tank to the evaporator A refrigerant circulation pipe 123 for supplying the evaporation spray 122 located inside the refrigerant circulation pipe 122 and a refrigerant branch pipe 1126 connecting the condenser inlet 301 and the refrigerant circulation pipe; A seventh opening / closing valve 1127, and an eighth opening / closing valve 1128 installed between the condenser inlet 301 and the regenerator.

The second embodiment removes the refrigerant branch pipe 126, the first on-off valve 127, the second refrigerant connecting pipe 128, the third on-off valve 129 and the second on-off valve 303 of the first embodiment And a refrigerant branch pipe 1126, a seventh open / close valve 1127 and an eighth open / close valve 1128 are provided, and the remaining components are the same.

6 to 8 are schematic diagrams showing an operating relationship of the outdoor air cooling system using the absorption type refrigerator of the second embodiment of the present invention. Fig. 6 is a system diagram when the cooling load is large. Fig. And Fig. 8 is a flowchart of heating.

6 to 8 indicate that no refrigerant, cooling water, or absorbing liquid flows, and a portion indicated by a solid line indicates a state in which refrigerant, cooling water, or absorbing liquid flows.

6, a seventh open / close valve 1127, a fourth open / close valve 602, a fifth open / close valve 604, and a sixth open / close valve 606, The eighth open / close valve 1128 is in the open state, and the various pumps 525, 124, 152 and 154 are in the operating state.

The operation is the same as that shown in Fig. 2, except for the portion indicated by the broken line in Fig. 6, which is the same as Fig. Therefore, detailed description is omitted.

Referring to Fig. 7, a case in which the cooling load is small, such as spring or autumn, will be described.

The seventh open / close valve 604 and the sixth open / close valve 606 are opened when the cooling load is small, and the seventh open / close valve 1127 is opened. Is in a closed state. The cooler pump 525, the coolant pump 124 and the cooling fan 513 are in an operating state and the first solution pump 152 and the second solution pump 154 ) Stops operating.

Looking at the operating relationship, the circulation of the cooling water circulates in the same manner as in Fig. That is, the cooling water cooled in the cooling tower is recovered to the cooling tower after cooling the sealed vessel 110 through the cooling water supply line 524, and the cooling water branched through the cooling water branch pipe 533 cools the evaporation condenser 300 .

The refrigerant flowing in the evaporative condenser 300 by the cooling water is cooled and then discharged through the condenser outlet 302 and then supplied to the evaporator water storage tank 121 through the refrigerant recovery pipe 125. In the evaporator water storage tank 121, A portion of the refrigerant is supplied to the evaporation spray 122 through the refrigerant pump 124 to cool the cold water coil 11 and a part of the refrigerant is supplied to the refrigerant branch pipe 1126 and the condenser inlet 302 Lt; / RTI > into the condenser and cooled again.

The cold water cooled in the cold water coil (11) is used for cooling the load (10).

Thus, when the cooling load is small, the cooling can be efficiently performed by using the outside air without using the regenerator and the absorber.

Also, unlike the prior art, cooling can be performed without branching a separate line from the cold water line to the cooling tower. Therefore, it is not necessary to separately provide the cooling tower with a heat exchanger for cooling the line branched from the cold water line.

Since the cold water, the cooling water and the refrigerant are not mixed at all, it is possible to prevent the cold water and the refrigerant from being contaminated by the cooling water exposed to the outside.

The heating operation will be described with reference to Fig.

During heating, the fourth valve 602, the fifth valve 604 and the sixth valve 606 are opened, and the first solution pump 152? And the remaining pumps are all stationary. Since the actual operation is the same as that of FIG. 5, detailed description is omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, 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 equivalent arrangements included within the spirit and scope of the invention.

121: evaporator water tank 110: airtight container
11: Cold water coil 120: Evaporator
130: absorber 200: regenerator
301: condenser inlet 302: condenser outlet
300: condenser 400: cooling water supply part
125: Refrigerant recovery pipe 122: Evaporation spray
123: Refrigerant circulation pipe 126, 1126: Refrigerant branch pipe
127: first opening / closing valve 128: second refrigerant connecting pipe
129: third open / close valve 303: second open / close valve
1127: seventh opening / closing valve 1128: eighth opening / closing valve
500: cooling tower 511: air inlet
512: air outlet 501: cooling tower frame
513: Cooling fan 510: Cooling water heat exchanger
530: condenser refrigerant heat exchanger 531: condenser refrigerant coil
532: Condenser Spray 533: Cooling water branch pipe

Claims (7)

An evaporator formed as a hermetically sealed container including an evaporator water reservoir therein for generating a refrigerant vapor to cool a cold water coil disposed therein;
An absorber communicating with the evaporator, the absorber being formed of a hermetically sealed container for containing the absorption liquid absorbing the refrigerant vapor;
A regenerator for absorbing the refrigerant vapor in the absorber to heat the diluted absorption liquid to vaporize the refrigerant to regenerate the concentrated absorption liquid;
A condenser inlet through which the refrigerant evaporated in the regenerator flows, a condenser which condenses the refrigerant introduced through the condenser inlet and discharges the condensed refrigerant through an outlet of the condenser;
A cooling water supply unit for supplying cooling water for cooling the absorption heat generated in the absorber;
A refrigerant recovery pipe for supplying the refrigerant discharged from the condenser outlet to the evaporator water storage tank;
A refrigerant circulation pipe for supplying the refrigerant stored in the evaporator water tank to an evaporation spray located inside the evaporator;
A refrigerant branch pipe connecting the condenser outlet and the refrigerant circulation pipe;
A first opening / closing valve installed in the refrigerant branch pipe;
A second refrigerant connection pipe connecting the condenser inlet and the refrigerant recovery pipe; And
A third opening / closing valve installed in the second refrigerant connecting pipe;
And an outdoor air cooling system using the absorption refrigerator.
The method according to claim 1,
A second on-off valve installed between the refrigerant branch pipe and the connecting portion of the refrigerant recovery pipe and the second refrigerant connection pipe;
Wherein the outdoor air cooling system further comprises an absorption refrigerator.
An evaporator formed as a hermetically sealed container including an evaporator water reservoir therein for generating a refrigerant vapor to cool a cold water coil disposed therein;
An absorber communicating with the evaporator, the absorber being formed of a hermetically sealed container for containing the absorption liquid absorbing the refrigerant vapor;
A regenerator for absorbing the refrigerant vapor in the absorber to heat the diluted absorption liquid to vaporize the refrigerant to regenerate the concentrated absorption liquid;
A condenser inlet through which the refrigerant evaporated in the regenerator flows, a condenser which condenses the refrigerant introduced through the condenser inlet and discharges the condensed refrigerant through an outlet of the condenser;
A cooling water supply unit for supplying cooling water for cooling the absorption heat generated in the absorber;
A refrigerant recovery pipe for supplying the refrigerant discharged from the condenser outlet to the evaporator water storage tank;
A refrigerant circulation pipe for supplying the refrigerant stored in the evaporator water tank to an evaporation spray located inside the evaporator; And
A refrigerant branch pipe connecting the condenser inlet and the refrigerant circulation pipe;
A seventh open / close valve installed in the refrigerant branch pipe;
And an outdoor air cooling system using the absorption refrigerator.
The method of claim 3,
An eighth opening / closing valve installed between the condenser inlet and the regenerator;
Wherein the outdoor air cooling system further comprises an absorption refrigerator.
5. The method according to any one of claims 1 to 4,
Wherein the condenser is installed in one cooling tower together with the cooling water supply unit.
6. The method of claim 5,
The cooling tower comprises:
A cooling tower frame in which an air inlet and an air outlet are formed, and a flow path communicating the air inlet and the air outlet is formed;
A cooling fan for generating an air flow in the flow path;
A cooling water heat exchanger installed on the flow path for cooling the cooling water; And
A condenser refrigerant heat exchanger installed on the flow path for cooling the refrigerant introduced into the condenser;
And an outdoor air cooling system using the absorption refrigerator.
The method according to claim 6,
The condenser refrigerant heat-
A condenser refrigerant coil through which the refrigerant circulates;
A condenser spray for dispensing cooling water to the condenser refrigerant coil; And
A cooling water branch pipe connecting the condenser spray and an outlet of the cooling water heat exchanger;
And an outdoor air cooling system using the absorption refrigerator.

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