JPH06185830A - Absorption type refrigerator, cold/warm water machine and heat pump provided with steam turbine and compressor at absorber - Google Patents

Abstract

PURPOSE:To reduce in size by forcibly sucking refrigerant vapor evaporated by an evaporator, compressing it, enhancing a pressure in a room of an absorber so that the refrigerant vapor is absorbed into absorption liquid, and reducing heat transfer areas of a low temperature regenerator, absorber, a high temperature heat exchanger, a low temperature heat exchanger, etc., for constituting an absorption refrigerator, cold/warm water machine and heat pump. CONSTITUTION:A compressor 70 and a steam turbine 72 of the same axis as that of the compressor are provided at an intermediate between an evaporator 6 and an absorber 7, part of refrigerant vapor generated from a high temperature regenerator 8 is introduced to the turbine 72 to drive the compressor 70, and refrigerant vaporized by the evaporator 6 is compressed by the compressor 70.

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, an absorption chiller-heater or a heat pump having a compressor provided between an evaporator and an absorber and a steam turbine coaxial with the compressor. is there.

[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 a structure as shown in FIG. 2 as an example. 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, the conventional absorption chiller-heater is of a system in which the refrigerant vapor evaporated in the evaporator 6 is absorbed by the absorbing liquid without increasing the pressure inside the absorber 7. The heat transfer area of the low temperature regenerator 2, the absorber 7, the high temperature heat exchanger 15, the low temperature heat exchanger 14 and the like becomes large, and there is a problem that the device becomes large and the weight increases.

The present invention has been made in view of the above points,
Refrigerant vapor evaporated in the evaporator is forcibly sucked and compressed,
To reduce the heat transfer area of the low-temperature regenerator, absorber, high-temperature heat exchanger, low-temperature heat exchanger, etc. that compose the absorption refrigerator by increasing the indoor pressure of the absorber and absorbing it in the absorbing liquid It is an object of the present invention to provide an absorption refrigerator / cooler / heater / heat pump having a steam turbine and a compressor as an absorber.

[0008]

In order to achieve the above object, an absorption refrigerator / cooler / heater / heat pump having a steam turbine and a compressor in the absorber of the present invention will be described with reference to FIG. For example, in an absorption type refrigerator / cooler / heater equipped with a low temperature regenerator 2, a condenser 3, an absorber 7, an evaporator 6 and a high temperature regenerator 8, a compressor 70 and a compressor 70 are provided between the evaporator 6 and the absorber 7. A steam turbine 72 coaxial with this compressor is provided, a part of the refrigerant vapor generated in the high temperature regenerator 8 is introduced into the steam turbine 72 to drive the compressor 70, and the refrigerant vaporized in the evaporator 6 is compressed by the compressor 70. It is characterized by doing so.

[0009]

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. In addition, in an Example, the case of an absorption chiller-heater is demonstrated as an example. FIG. 1 shows an embodiment of the present invention.
In FIG. 1, reference numeral 70 denotes a compressor (for example, a turbo compressor), which is provided between the evaporator 6 and the absorber 7. 72 is a steam turbine coaxial with this turbo compressor. Part of the refrigerant vapor generated in the high temperature regenerator 8 is introduced into the steam turbine 72, the turbine rotates, and the turbo compressor 70 drives. And the evaporator 6
The refrigerant vaporized in (1) is compressed by the turbo compressor 70, and the compressed refrigerant liquid is supplied to the absorber 7. In addition to the refrigerant vapor, other vapor may be used as the working medium of the steam turbine 72.

That is, a turbo compressor 70 is provided between the evaporator 6 and the absorber 7 of the absorption refrigerator / cooler / heater,
The same type or different type of steam as the refrigerant of the absorber 7 is used as a working fluid, the turbo compressor 70 is driven by the steam turbine 72, and the vaporized refrigerant is compressed by the evaporator 6,
It employs a method of increasing the pressure to enhance the capacity of the absorbing liquid.

Next, the operation of this embodiment will be described. As shown in FIG. 1, a part of the steam g _T generated in the high temperature regenerator 8 is introduced into the steam turbine 72 via the pipe 74 to drive the turbo compressor 70. on the other hand,
Similarly, of the steam generated in the high temperature regenerator 8, the remaining steam g
₂ flows into the low temperature regenerator _{2 and} is cooled by the diluted solution G ₂ flowing out of the absorber 7 and condensed to become refrigerant water. The steam g _T that has flowed into the steam turbine 72 passes through the steam turbine 72, is cooled by the condenser 3 to become refrigerant water, and is used by the evaporator 6. The turbo compressor 70 driven by the steam turbine 72 uses the refrigerant vapor g ₁ evaporated in the evaporator 6 from the pressure P _S1 to the pressure P _SC.
Since it is pressurized up to and is forcedly inserted into the absorber 7, the absorption amount in the absorber 7 is overwhelmingly increased, and the difference in solution concentration between the absorption solution G ₁ and the diluted solution G ₂ is greatly increased. It is possible to reduce the size of refrigerators, chiller / heaters, and heat pumps and reduce their weight. Other configurations and operations are similar to those in the case of FIG.

[0012]

Since the present invention is configured as described above, it has the following effects. (1) Refrigerant vapor that has evaporated in the evaporator is forcibly sucked and compressed, and the indoor pressure of the absorber is increased to be absorbed by the absorbing liquid, so low-temperature regeneration that constitutes an absorption refrigerator / cooler / heater / heat pump. The heat transfer area of the heat exchanger, the absorber, the high temperature heat exchanger, the low temperature heat exchanger, etc. can be reduced and the size can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a flow of an embodiment of an absorption refrigerator / cooler / heater / heat pump having a steam turbine and a compressor in an absorber of the present invention.

FIG. 2 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 70 Compressor 72 Steam turbine

Claims (1)

[Claims] 1. An absorption refrigerating machine, a cold / hot water machine, comprising: a low temperature regenerator (2), a condenser (3), an absorber (7), an evaporator (6) and a high temperature regenerator (8). A compressor (70) and a steam turbine (72) coaxial with the compressor (70) are provided between the compressor (6) and the absorber (7), and a part of the refrigerant steam generated in the high temperature regenerator (8) is steam turbine ( 72) is driven to drive the compressor (70), and the refrigerant vaporized in the evaporator (6) is compressed in the compressor (70). An absorption type having a steam turbine and a compressor in the absorber. Refrigerator, hot and cold water machine, heat pump.