JPH06201209A - Absorptive refrigeration machine and hot water and chilled water making machine provided with double heating low temperature regenerator - Google Patents

Abstract

PURPOSE:To improve the performance coefficients of an absorptive refrigeration machine and a hot water and chilled water making machine and prevent temperature rise of atmospheric air by adequately performing heat recovery on a combustion exhaust gas. CONSTITUTION:A high temperature regenerator 64 and a low temperature regenerator 62 are connected to each other through a combustion exhaust gas duct 66 so as to heat the low temperature regenerator 62 by means of a combustion exhaust gas having been used in concentration of an absorbing liquid in the high temperature regenerator 64 and to introduce a refrigerant vapor generated in the high temperature regenerator 64 into a heat-transfer pipe 63 of the low temperature regenerator 62 for concentration of a dilute solution fed from an absorber 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating machine or an absorption chiller-heater, wherein the low-temperature regenerator is a double-heating low-temperature regenerator, and an apparatus provided with a cycle using the double-heating low-temperature regenerator. Regarding

[0002]

2. Description of the Related Art Conventionally, an absorption chiller-heater using, for example, lithium bromide as an absorbent and water as a refrigerant is generally known. The conventional absorption chiller-heater has, for example, a configuration as shown in FIG. Reference numeral 1 denotes an upper low temperature cylinder, which is composed of a low temperature regenerator 2 and a condenser 3, and a refrigerant reservoir 4 is provided in the lower portion of the condenser 3. Reference numeral 5 denotes a lower cold cylinder, which is composed of an evaporator 6 and an absorber 7. 8 is a high temperature regenerator, which is a combustion chamber 9, a heat recovery device 10, a gas-liquid separator 1.
1, an exhaust stack 12 and a combustion device 13. In addition, the low temperature heat exchanger 14, the high temperature heat exchanger 15 and the like are constituent devices. The dilute liquid in the lower liquid pool 16 in the absorber 7 is
Pipes 18, 19 by the low-temperature pump 17, low-temperature heat exchanger 1
4, sent to the low temperature regenerator 2 via the pipe 20. This dilute liquid is heated by the high temperature refrigerant vapor flowing from the pipe 21 and concentrated to an intermediate concentration.

The liquid having this intermediate concentration is divided into two. One of the two halves of the liquid is supplied by the high temperature pump 22 to the pipe lines 23, 24,
It is sent to the high temperature regenerator 8 via the high temperature heat exchanger 15 and the pipe 25. The intermediate concentration liquid is heated by the combustion device 13, rises in the heat recovery device 10, enters the gas-liquid separator 11, and is separated into a refrigerant vapor and a concentrated liquid. This concentrated liquid is a high temperature regenerator 8
Due to the pressure difference between the internal pressure of approximately 650 mmHg and the internal pressure of the lower low temperature cylinder 5 of approximately 6 mmHg, the concentrated liquid pipe line 26 and the high temperature heat exchanger 1
5. After passing through the pipe line 27, it is mixed with the intermediate liquid (the other of the two divided liquids) from the pipe line 28 which has been previously branched, and becomes a mixed concentrated liquid and enters the low temperature heat exchanger 14, and the pipe line 29 is passed. The passing spraying device 30 sprays the heat transfer tubes of the absorber 7 to form the liquid pool 1
The circulation returning to 6 is made.

On the other hand, the refrigerant vapor separated in the gas-liquid separator 11 enters the low temperature regenerator 2 via the pipe 21, heats the liquid to condense and liquefy, and then enters the condenser 3 from the pipe 46. Further, in the low temperature regenerator 2, the refrigerant vapor generated when the dilute liquid is concentrated to the intermediate concentration liquid enters the condenser 3 from the upper space and is condensed to become the refrigerant liquid. These condensed refrigerant waters are
It enters the evaporator 6 via the pipe 31 and is accumulated in the lower pool 32. This refrigerant water is supplied to the pipelines 34 and 3 by the refrigerant pump 33.
After 5, the spraying device 36 sprays the heat on the heat transfer tubes of the evaporator 6.

Cold water to be used for cooling enters the evaporator 6 from the pipe 37, is cooled by the latent heat of vaporization of the dropping refrigerant, and flows out from the pipe 38. The cooling water is supplied to the pipes 39, 40,
After passing through 41, it flows out and the absorption heat in the absorber 7 and the condensation heat in the condenser 3 are taken away and taken out of the system. Further, by opening the cooling / heating switching valve 60 and stopping the cooling water supplied to the pipe 39, hot water can be obtained from the pipe 38.

[0006]

As described above, in the conventional absorption chiller-heater, the diluted solution (diluted liquid) flowing out from the absorber 7 is mainly heat-exchanged with the refrigerant steam from the high-temperature regenerator 8 and is mainly used. The dilute liquid was concentrated by the latent heat of the refrigerant vapor to recover the amount of heat. On the other hand, the combustion exhaust gas discharged from the exhaust stack 12 of the high temperature regenerator 8 has a high temperature and causes white smoke. In addition, the atmospheric temperature rises, which is not preferable in terms of environmental measures.

The present invention has been made in view of the above points,
An object of the present invention is to concentrate the dilute liquid from the absorber flowing into the low temperature regenerator with both the refrigerant vapor generated in the high temperature regenerator and the combustion exhaust gas used in the high temperature regenerator. By doing so, it is to provide a cycle system in which the temperature of the combustion exhaust gas discharged to the atmosphere is lowered and the coefficient of performance of the refrigeration cycle is improved.

[0008]

In order to achieve the above object, an absorption refrigerator / cooler / heater equipped with a dual heating type low temperature regenerator according to the present invention, as shown in FIG. 1 and FIG. In an absorption refrigerator / cooler / heater equipped with a low temperature regenerator, a condenser, an absorber, an evaporator and a high temperature regenerator, the high temperature regenerator 64 and the low temperature regenerator 62 are connected via a combustion exhaust gas duct 66,
The combustion exhaust gas used for concentrating the absorbing liquid in the high temperature regenerator 64 is introduced into the low temperature regenerator 62 to heat the low temperature regenerator 62, and the refrigerant vapor generated in the high temperature regenerator 64 is transferred to the heat transfer tube of the low temperature regenerator 62. It is characterized in that it is introduced into 63 to concentrate the diluted solution sent from the absorber 7.

In the above absorption refrigerator / cooler / cooler / heater, it is desirable to provide a large number of fins 74 in the heat recovery portion of the high temperature regenerator 64 and a large number of fins 76 on the outer surface of the low temperature regenerator 62. Further, it is desirable that the absorber 7 and the condenser 3 are connected via an air duct 78, the absorber 7 is cooled with air, and then the condenser 3 is cooled with this exhaust air.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings. However, the shape of the constituent devices described in this embodiment, the relative arrangement thereof, and the like, unless otherwise specified, are not intended to limit the scope of the present invention only to them, but merely illustrative examples. Nothing more. FIG. 1 shows an embodiment of the present invention. 62 is a double heating low temperature regenerator, 63 is a heat transfer tube of a low temperature regenerator, and 64 is a high temperature regenerator. The high temperature regenerator 64 and the low temperature regenerator 62 are connected via a combustion exhaust gas duct 66. Reference numeral 68 is an air feeding fan, and 70 is an exhaust stack.

A large number of fins 74 are provided substantially horizontally in the heat recovery section of the high temperature regenerator 64, for example, the liquid rising pipe 72, and a large number of fins 7 are also provided on the outer surface of the low temperature regenerator 62.
6 is provided substantially horizontally. Further, the absorber 7 and the condenser 3 are connected via an air duct 78. 80
Is an air inlet and 82 is an air outlet.

Next, the operation of this embodiment will be described. In the high temperature regenerator 64, the combustion exhaust gas from the combustion device 13 is heated from the inside and the outside of the liquid rising pipe 72,
The dilute liquid that enters from absorber 7 via line 25 is concentrated. The concentrated liquid passes through the high temperature heat exchanger 15 and the low temperature heat exchanger 14 and is sprayed onto the heat transfer tubes of the absorber 7. The refrigerant vapor generated in the liquid rising pipe 72 is sent to the heat transfer pipe 63 of the low temperature regenerator 62 through the pipe line 21. The combustion exhaust gas used for concentrating the absorbing liquid in the high temperature regenerator 64 is introduced into the low temperature regenerator 62 via the exhaust gas duct 66 to heat the low temperature regenerator 62 from the outside, and the exhaust gas is cooled and discharged from the exhaust stack 70 to the atmosphere. Is released to.

On the other hand, the absorber 7 is cooled by the air introduced from the air inlet 80, and the cooled exhaust air is discharged from the air outlet 82 after cooling the condenser 3 through the air duct 78. Other configurations and operations are similar to those in the case of FIG.

FIG. 2 shows another embodiment of the absorption refrigerator / cooler / heater equipped with the double heating type low temperature regenerator of the present invention. In the present embodiment, instead of the double-structured so-called L-type low temperature heat exchanger 14 and high temperature heat exchanger 15 shown in FIG. 1, a so-called H having a structure in which two heat transfer tubes are incorporated as shown in FIG. The mold type low temperature heat exchanger 90 and the high temperature heat exchanger 92 are used. Other configurations and operations are similar to those in FIG.

[0015]

Since the present invention is configured as described above, it has the following effects. (1) Since the diluted liquid from the absorber flowing into the low temperature regenerator is concentrated by both the refrigerant vapor generated in the high temperature regenerator and the combustion exhaust gas used in the high temperature regenerator, the combustion exhaust gas is retained. In addition to being able to efficiently recover heat, the temperature of the combustion exhaust gas discharged to the atmosphere becomes low, so white smoke can be prevented and the rise in atmospheric temperature can be prevented, and moreover,
It is possible to improve the coefficient of performance of the refrigeration cycle and save fuel. (2) When the absorber and the condenser are air-cooled, the coefficient of performance can be further improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a flow of an embodiment of an absorption refrigerator / cooler / heater equipped with a double heating low-temperature regenerator of the present invention.

FIG. 2 is an explanatory view showing a flow of another embodiment of the absorption refrigerator / cooler / cooler / heater equipped with the double heating type low temperature regenerator of the present invention.

FIG. 3 is an explanatory diagram showing a flow of a conventional absorption chiller-heater.

[Explanation of symbols]

 2 Low temperature regenerator 3 Condenser 6 Evaporator 7 Absorber 8 High temperature regenerator 14 Low temperature heat exchanger 15 High temperature heat exchanger 62 Low temperature regenerator 63 Heat transfer tube 64 High temperature regenerator 66 Combustion exhaust gas duct 74 Fin 76 Fin 78 Air duct 90 Low temperature heat exchanger 92 High temperature heat exchanger

Claims (3)

[Claims] 1. An absorption refrigerator / cooler / heater equipped with a low temperature regenerator, a condenser, an absorber, an evaporator and a high temperature regenerator, wherein a high temperature regenerator (64) and a low temperature regenerator (62) are used as combustion exhaust gas. High temperature regenerator (6
The combustion exhaust gas used for the concentration of the absorption liquid in 4) is introduced into the low temperature regenerator (62) to heat the low temperature regenerator (62), and the refrigerant vapor generated in the high temperature regenerator (64) is cooled to the low temperature regenerator. An absorption chiller equipped with a double heating low-temperature regenerator, characterized by being introduced into the heat transfer tube (63) of (62) to concentrate the diluted solution sent from the absorber (7). -Cold and hot water machine. 2. The heat recovery section of the high temperature regenerator (64) is provided with a large number of fins (74) and the low temperature regenerator (62).
2. An absorption chiller / cooler / heater equipped with a double heating low-temperature regenerator according to claim 1, characterized in that a large number of fins (76) are provided on the outer surface of said. 3. The absorber (7) and the condenser (3) are connected via an air duct (78), the absorber (7) is cooled by air, and the exhaust air is used to cool the condenser (3). The absorption refrigerator / cooler / heater equipped with the double heating low-temperature regenerator according to claim 1 or 2, characterized in that it is cooled.