KR200445537Y1 - Hybrid Absoption Cooling System - Google Patents

Abstract

The present invention relates to a hybrid absorption type cooling system that uses solar heat as the main heat source and can be supplemented with its own heat source when the solar radiation is insufficient. The hybrid absorption type cooling system according to the present invention is generated in a heat storage tank storing hot water heated in a solar collector, an absorption air conditioner generating cold water using hot water supplied from a heat storage tank, a cooling tower supplying cooling water to an absorption air conditioner, and an absorption air conditioner. And an air conditioner for cooling the air by using the cold water. Absorption air conditioners are absorbers, solar regenerators that separate the refrigerant vapor from the absorption solution delivered from the absorber using hot water supplied from the heat storage tank, and high temperature regenerators that separate the hot refrigerant vapor from the absorption solution delivered from the absorber using a heating source. A low temperature regenerator which separates the refrigerant vapor from the absorbent solution transferred from the absorber using the high temperature refrigerant vapor transferred from the high temperature regenerator, a condenser which condenses the refrigerant vapor transferred from the solar regenerator or the low temperature regenerator using the cooling water, And an evaporator which evaporates the refrigerant and generates cold water. The hot regenerator, cold regenerator and condenser operate when the temperature of the hot water stored in the heat storage tank is below the first reference temperature.

 Hybrid, Absorption Chiller, Solar, Self Heat Source

Description

Hybrid Absoption Cooling System

The present invention relates to a hybrid absorption type cooling system, and more particularly, to a hybrid absorption type cooling system that can be used by supplementing with its own heat source when solar heat is used as the main heat source and the amount of insolation is insufficient.

Absorption cooling systems use solar heat or heat sources such as gas and oil to perform cooling of buildings. In particular, the use of solar heat in the summer with high solar intensity saves driving costs and eliminates fossil fuels, which reduces global warming and reduces environmental pollution.

1 shows a simplified illustration of a cooling system 10 using solar heat according to the prior art. Referring to FIG. 1, the hot water raised in the solar collector 11 is stored in the heat storage tank 12. The hot water stored in the heat storage tank 12 is supplied to the absorption type cooler 13 and used as an energy source for generating cold water. At this time, the cooling tower 14 supplies the cooling water to the absorption type air conditioner (13). The cold water generated by the absorption air conditioner 13 is supplied to an air handling unit (AHU) or a fan coil unit (FCU) 15 to cool the room.

In order for the absorption chiller 13 to operate in the cooling system 10 according to FIG. 1, the temperature of the hot water supplied to the absorption chiller 13 must be greater than or equal to a predetermined minimum temperature (eg, 88 ° C.). When the temperature of the hot water is less than the minimum temperature, the refrigerant vapor (water vapor) is not smoothly separated from the regenerator in the absorption chiller 13, and the absorption chiller 13 is not driven.

Therefore, when the amount of insolation is insufficient, the cooling system 10 cannot be driven when the temperature of the hot water cannot be raised above the minimum temperature through the solar collector 11 such as during rainy weather or after sunset. In such a case, an auxiliary heat source such as auxiliary boiler 16 may be used to raise the temperature of the hot water above the minimum temperature. The water heated by the auxiliary boiler 16 is stored in the auxiliary tank 17, and the heated water stored in the auxiliary tank 17 is made above the minimum temperature when the temperature of the hot water in the heat storage tank 12 is below the minimum temperature. Used to elevate.

However, since the thermal efficiency of the auxiliary boiler 16 is about 0.85 and the coefficient of performance COP of the absorption chiller 13 is about 0.7, the efficiency of the overall cooling system 10 is significantly reduced. In addition, the configuration of additional devices such as auxiliary boiler 16 and auxiliary tank 17 is required.

On the other hand, when there is a large amount of solar radiation, the solar collector 11 may be overheated. This occurs when the energy absorbed by the solar collector 11 is higher than the energy required to drive the absorption air conditioner 13. However, the cooling system 10 according to the prior art cannot cool the overheated solar collector 11 to an appropriate temperature.

The present invention was devised to overcome the above-mentioned problems, when the solar radiation and lack of solar radiation to drive the air conditioner using its own heat source equipment, if there is no solar radiation hybrid absorption type cooling system for driving the air conditioner using only its own heat source equipment. It aims to provide.

In addition, another object of the present invention is to provide a hybrid absorption cooling system capable of preventing overheating of a solar collector.

In order to achieve the above object, the present invention is a heat storage tank for storing hot water heated in a solar collector, an absorption chiller for generating cold water using hot water supplied from the heat storage tank, a cooling tower for supplying cooling water to an absorption chiller, an absorption chiller A hybrid absorbent cooling system comprising an air conditioner that cools air by using cold water generated by the absorbent air conditioner, wherein the absorber cooler includes: an absorber; A solar regenerator separating the refrigerant vapor from the absorbent solution transferred from the absorber using hot water supplied from the heat storage tank; A hot regenerator for separating hot refrigerant vapor from the absorbent solution delivered from the absorber using a heating source; A low temperature regenerator separating the refrigerant vapor from the absorbent solution delivered from the absorber using the high temperature refrigerant vapor delivered from the high temperature regenerator; A condenser to condense the refrigerant vapor delivered from the solar or low temperature regenerator using cooling water; The evaporator, which evaporates the refrigerant delivered from the condenser and generates cold water, includes a high temperature regenerator, a low temperature regenerator and a condenser to provide a hybrid absorption cooling system that operates when the temperature of the hot water stored in the heat storage tank is below the first reference temperature.

The absorption chiller may further include a first heat exchanger for transferring heat from the hot refrigerant vapor delivered from the hot regenerator to the hot water supplied from the heat storage tank.

In addition, the hybrid absorption cooling system may further include a second heat exchanger for transferring heat from the hot water supplied from the heat storage tank to the cooling water supplied from the cooling tower when the temperature of the hot water stored in the heat storage tank is greater than or equal to the second reference temperature.

According to the present invention described above, when the temperature of the hot water heated by the solar heat collector is difficult to drive the absorption type cooler, it is possible to drive the absorption type cooler by driving the high temperature regenerator using its own heating source. The hot refrigerant vapor generated in the hot regenerator may be used to circulate separately from the solar heat drive through the cold regenerator or to reheat the hot water through the heat exchanger.

In addition, according to the present invention, when the solar collector is overheated, the superheated hot water may be cooled using a cooling tower.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

Figure 2 shows the overall configuration of the hybrid absorption type cooling system according to the present invention, Figure 3 shows the configuration of the absorption type air conditioner 100 in the hybrid absorption type cooling system of Figure 2 in detail.

Referring to FIG. 2, the hybrid absorption type cooling system according to the present invention includes an absorption type air conditioner (100), a solar collector (200) for heating hot water using solar heat, and stored hot water heated in the solar collector (200). Air handling unit for cooling the indoor air by using the cold water supplied from the heat storage tank 300 to supply the 100, the cooling tower 400 for supplying the cooling water to the absorption type air conditioner (100), the absorption type air conditioner (100). , AHU) or a fan coil unit (FCU) 500. Absorption air conditioner 100 is a gas, oil, electricity or the like to generate heat itself.

Referring to FIG. 3, the absorption air conditioner 100 includes an absorber 110, a solar regenerator 120, a high temperature regenerator 130, a low temperature regenerator 140, a condenser 150, an evaporator 160, and a heat exchanger 170. It includes.

The absorber 100 sprays the concentrated solution (eg, LiBr solution) supplied from the solar regenerator 120, the high temperature regenerator 130, the low temperature regenerator 140, and the like, and the refrigerant vapor supplied from the evaporator 160 (eg, For example, water vapor) when using LiBr solution. In order to prevent the absorption rate of the refrigerant vapor from decreasing while the temperature inside the absorber 100 is increased by the latent heat generated while absorbing the refrigerant vapor, the absorber 100 is cooled by the cooling water supplied from the cooling tower 400.

The diluted solution of the absorber 110 is supplied to the solar regenerator 120, the high temperature regenerator 130, the low temperature regenerator 140, and the like.

Minimum amount of solar radiation is heated by the solar collector 200 and the temperature of the hot water stored in the heat storage tank 300 is a minimum temperature (first reference temperature, for example, about 88 ℃) sufficient to drive the absorption air conditioner 100 ), The diluted solution of the absorber 100 is supplied only to the solar regenerator 120 and not to the hot regenerator 130 and the low temperature regenerator 140. The dilute solution introduced into the solar regenerator 120 is heated by hot water supplied from the heat storage tank 300. The refrigerant vapor (water vapor) evaporated in the solar regenerator 120 is supplied to the condenser 150, and the concentrated solution is supplied to the absorber 110 by evaporation of the refrigerant vapor. This process is the same as a conventional absorption air conditioner using solar heat.

When the amount of solar radiation is insufficient and the temperature of the hot water is lower than the first reference temperature, the diluted solution of the absorber 100 is supplied to the high temperature regenerator 130 and / or the low temperature regenerator 140.

According to one embodiment of the present invention, when the temperature of the hot water is lower than the first reference temperature due to the insufficient amount of solar radiation, the diluted solution of the absorber 100 is the solar regenerator 120, the high temperature regenerator 130 and the low temperature regenerator 140. Is supplied. The solar regenerator 120 generates the refrigerant vapor and the diluted solution using hot water, but the amount is not sufficient because the temperature of the hot water is lower than the first reference temperature. The diluted solution introduced into the hot regenerator 130 is heated using gas combustion or the like. The solution vapor generated in the high temperature regenerator 130 is condensed while passing through the low temperature regenerator 140 and flows into the condenser 150 in a liquid state. In this process, the diluted solution introduced into the low temperature regenerator 140 is heated. The refrigerant vapor generated while the solution in the low temperature regenerator 140 is heated is supplied to the condenser 150. In this process, the refrigerant vapor generated from the solar regenerator 120 and the low temperature regenerator 140 flows into the condenser 150, and the concentrated solution generated from the solar regenerator 120, the high temperature regenerator 130, and the low temperature regenerator 140 is Flows into the absorber 110. That is, a refrigeration cycle using the solar regenerator 120 and a refrigeration cycle using the high temperature regenerator 130 and the low temperature regenerator 140 are simultaneously executed. Thus, insufficient solar heat can be compensated for by using a heat source such as gas combustion.

According to another embodiment of the present invention, when the temperature of the hot water is lower than the first reference temperature due to insufficient solar radiation amount, the diluted solution of the absorber 100 is supplied to the solar regenerator 120 and the high temperature regenerator 130. The diluted solution introduced into the hot regenerator 130 is heated using gas combustion or the like. The solution vapor generated in the hot regenerator 130 is condensed while passing through the heat exchanger 170 and flows into the condenser 150 in a liquid state. Meanwhile, some or all of the hot water supplied from the heat storage tank 300 passes through the heat exchanger 170, and absorbs heat from the solution vapor from the high temperature regenerator 130 in the heat exchanger 170 to be equal to or greater than the first reference temperature. Heated to. The hot water further heated in the heat exchanger 170 flows into the solar regenerator 120 to heat the solution, generating refrigerant vapor and concentrated solution. In this process, the refrigerant vapor generated in the solar regenerator 120 is introduced into the condenser 150, and the concentrated solution generated in the solar regenerator 120 and the high temperature regenerator 130 is introduced into the absorber 110. Thus, insufficient solar heat can be compensated for by using a heat source such as gas combustion.

On the other hand, when there is no solar radiation at all, the temperature of the hot water is much lower than the first reference temperature, the solar regenerator 120 may not contribute to the driving of the absorption type air conditioner 100 at all. In this case, the diluted solution of the absorber 100 is supplied to the hot regenerator 130 and the cold regenerator 140, and not to the solar regenerator 120. The diluted solution introduced into the hot regenerator 130 is heated using gas combustion or the like. The solution vapor generated in the high temperature regenerator 130 is condensed while passing through the low temperature regenerator 140 and flows into the condenser 150 in a liquid state. In this process, the diluted solution introduced into the low temperature regenerator 140 is heated. The refrigerant vapor generated while the solution in the low temperature regenerator 140 is heated is introduced into the condenser 150, and the concentrated solution generated in the high temperature regenerator 130 and the low temperature regenerator 140 is introduced into the absorber 110.

The refrigerant vapor introduced into the condenser 150 from the solar regenerator 120 and the low temperature regenerator 140 transfers heat to the cooling water supplied from the cooling tower 400 and is condensed.

The refrigerant liquid condensed in the condenser 150 flows into the evaporator 160, is injected, and evaporates in the evaporator 160. As the refrigerant liquid evaporates, heat is removed from the cold water (eg, about 12 ° C.) introduced from the AHU or FCU 500. Cold water cooled at evaporator 160 (eg, about 7 ° C.) is directed to AHU or FCU 500 and used to cool the room air. In addition, the refrigerant vapor evaporated in the evaporator 160 is moved to the absorber 110 and absorbed by the concentrated solution injected from the absorber 110. Thus, the solution and the refrigerant circulate in the absorption chiller 100.

Referring back to FIG. 2, the absorption refrigeration system according to the present invention may further include a heat exchanger 600. When the hot water of the solar collector 200 and the heat storage tank 300 is overheated (above the second reference temperature), and the absorption chiller 100 does not sufficiently use the hot water stored in the heat storage tank 300, the heat storage tank ( Some or all of the hot water stored in 300 circulates through the heat exchanger 600, and some or all of the cooling water of the cooling tower 400 also circulates through the heat exchanger 600. The hot water passing through the heat exchanger 600 transfers heat to the cooling water passing through the heat exchanger 600 so that the hot water is cooled and the cooling water is heated. Thus, the hot water is prevented from overheating.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the present invention, and all such changes and modifications are It is obvious that it belongs to the scope of the attached utility model registration request.

1 is a block diagram of an absorption type cooling system using solar heat according to the prior art,

2 is a block diagram of a hybrid absorption type cooling system according to the present invention, and

3 is a configuration diagram of the absorption type air conditioner of FIG. 2.

<Description of Drawing>

100: Absorption air conditioner

110: absorber

120: solar regenerator

130: high temperature regenerator

140: low temperature regenerator

150: condenser

160: evaporator

170: heat exchanger

200: solid color

300: heat storage tank

400: cooling tower

500: AHU, FCU

600: heat exchanger

Claims (3)

A heat storage tank 300 for storing the hot water heated by the solar collector, an absorption chiller 100 for generating cold water using the hot water supplied from the heat storage tank 300, and a cooling tower for supplying cooling water to the absorption chiller 100. (400), a hybrid absorption type cooling system including an air conditioner (500) for cooling the air by using the cold water generated in the absorption type air conditioner, the absorption type air conditioner (100), Absorber 110; A solar regenerator (120) separating the refrigerant vapor from the absorption solution transferred from the absorber (110) by using hot water supplied from the heat storage tank (300); A high temperature regenerator 130 for separating the high temperature refrigerant vapor from the absorbent solution transferred from the absorber 110 using a heating source; A low temperature regenerator (140) for separating the refrigerant vapor from the absorbent solution transferred from the absorber (110) by using the high temperature refrigerant vapor transferred from the high temperature regenerator (130); A condenser (150) for condensing the refrigerant vapor delivered from the solar regenerator (120) or the low temperature regenerator (140) using the cooling water; An evaporator 160 for evaporating the refrigerant delivered from the condenser 150 and generating the cold water; And And a first heat exchanger (170) for transferring heat from the high temperature refrigerant vapor transferred from the high temperature regenerator (130) to the hot water supplied from the heat storage tank (300). delete The method of claim 1, And a second heat exchanger (600) for transferring heat from the hot water supplied from the heat storage tank (300) to the cooling water supplied from the cooling tower (400).

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