JPH1047806A - Absorption refrigerating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption refrigerating machine capable of using 100% of intermediate and low temperature hot water by providing a heat exchanger only for hot water. SOLUTION: An absorption refrigerating machine using hot water as the heat source of a low temperature regenerator 2 comprises an absorber 4, an evaporator 3, a condenser 1, the low temperature regenerator 2, solution heat exchangers 7A and 7B, a solution pump P2, a refrigerant pump P1 and a pipeline for connecting them together. The absorption refrigerating machine is provided with a heat exchanger 6 only for hot water for heating hot water which is the heat source of the low temperature regenerator 2 and a high temperature regnerator 5 which uses gas, oil or high potential energy as a heat source, concentrates solution from the low temperature regenerator and supplies generated refrigerant steam to the hot water heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to solar heat, industrial waste heat,
The present invention relates to an absorption chiller that makes full use of medium- and low-temperature hot water for air conditioning of a garbage incineration plant and a building.

[0002]

2. Description of the Related Art Conventionally, a medium-temperature exhaust heat is generally used by using a single-effect absorption refrigerator shown in FIG. The absorption refrigerator using hot water will be described with reference to FIG. 3. The condenser 1, the low-temperature regenerator 2, the evaporator 3, the absorber 4, and the solution heat exchanger 7A are provided. A solution channel and a coolant channel are provided.

The refrigerant is sent from the pump P 1 to the refrigerant liquid pipe 13, is sprayed on the heat exchange tube 18 A in the evaporator 3, and is heated and evaporated by the cold water flowing in the cold water pipe 9. Chilled water is deprived of heat by evaporation of the refrigerant and cooled.
The cooling of the cold water by the evaporation of the refrigerant is the refrigeration capacity of the absorption refrigerator. The evaporated refrigerant is absorbed and diluted in the absorber 4 by the concentrated solution (hereinafter, referred to as “concentrated solution”) sprayed from the concentrated solution pipe 20 to become a dilute solution.

[0004] The dilute solution is sent from the solution pump P2 to the low temperature regenerator 2 through the dilute solution pipe 19, and is heated and concentrated by the low temperature water flowing in the heat exchanger tube 18C.
The concentrated dilute solution becomes a concentrated solution. The concentrated solution is sent to the absorber 4 through the concentrated solution pipe 20, and is used for absorbing the refrigerant evaporated in the evaporator 3. Further, the refrigerant vapor generated by the concentration of the dilute solution in the low-temperature regenerator 2 is cooled by the cooling water flowing to the condenser 1 and flowing through the heat exchange tube 18B and condensed. The condensed refrigerant is sent to the evaporator 3 through the refrigerant drain pipe 12 and is used to cool the chilled water flowing through the chilled water pipe 9.

In FIG. 3, a solution heat exchanger 7A is a heat exchanger for exchanging heat between a dilute solution passing through a dilute solution pipe 19 and a concentrated solution passing through a concentrated solution pipe 20. Also, 17
Is a capacity control valve.

Further, as shown in FIG. 4, there has been proposed a system utilizing hot water in a low-temperature regenerator of a double effect absorption refrigerator. In the system shown in FIG. 4, a regenerator for concentrating the diluted solution includes a high-temperature regenerator 5 and a low-temperature regenerator 2, and the low-temperature regenerator 2 is provided with a heat exchange tube 18F for medium-low temperature heat. Dilute solution piping 1 from absorber 4 to solution pump P2
9 and sent to the high temperature regenerator 5 where the heat exchange tubes 18
It is heated by a heating medium (mainly steam) flowing through E, and is concentrated to an intermediate concentration solution (hereinafter, referred to as “intermediate concentration solution”).

The intermediate concentration solution is sent to the low temperature regenerator 2 through the intermediate concentration solution pipe 14. The refrigerant vapor generated in the high-temperature regenerator 5 is sent to the low-temperature regenerator 2, and heats and concentrates the intermediate-concentration solution in the low-temperature regenerator 2. At this time, the exhaust heat recovery is performed by flowing the medium / low temperature heat into the heat exchange tube 18F and heating the intermediate concentration solution in the low temperature regenerator 2. The intermediate-concentration solution is concentrated in the low-temperature regenerator 2 to become a concentrated solution. The concentrated solution is sent to the absorber 4 and used to absorb refrigerant vapor generated when producing cold water.

In FIG. 4, portions denoted by the same reference numerals as those in FIG. 3 indicate the same or corresponding portions. The solution heat exchanger 7B is connected to the dilute solution passing through the dilute solution pipe 19 and the concentrated solution pipe 20.
A heat exchanger for performing heat exchange between the concentrated solution passing through the heat exchanger, and a solution heat exchanger 7A for performing heat exchange between the intermediate concentration solution passing through the intermediate concentration solution pipe and the dilute solution passing through the dilute solution pipe 19 It is.

[0009]

In the above-mentioned conventional absorption chiller, it is rare to balance the refrigeration load with the amount of heat and the temperature of the medium- and low-temperature exhaust heat corresponding to the refrigeration load. The absorption chiller was prepared, but if a shortage was added by adding another heat source or using a refrigerator with an auxiliary heat source, the heat of another heat source and the auxiliary heat source would be used, and the medium and low temperature exhaust heat would be used effectively. There was a problem that it was not possible.

[0010] The present invention has been made in view of the above points, and an object of the present invention is to provide an absorption refrigerator capable of using 100% of medium-low temperature water by providing a heat exchanger exclusively for hot water.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to an absorber, an evaporator, a condenser, a low-temperature regenerator, a solution heat exchanger, a solution pump, a refrigerant pump and the like. In an absorption refrigerator using hot water as a heat source of a regenerator, a hot water heat exchanger for heating hot water that is a heat source of the regenerator, and the regenerator using high potential energy such as gas, oil, or steam as a heat source. And a high-temperature regenerator for supplying the generated refrigerant vapor to the hot water heat exchanger while concentrating the refrigerant solution from the heat exchanger.

According to a second aspect of the present invention, in the absorption refrigerator of the first aspect, a mode in which the high-temperature regenerator is used as a heat source and the high-temperature regenerator is used as a heat source is used for heating the hot water. It is characterized by having a mode of driving while driving.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of an absorption refrigerator according to the present invention. In FIG. 1, FIG. 3 and FIG.
The same reference numerals denote the same or corresponding parts. 6
Is a heat exchanger exclusively for hot water. The refrigerant evaporated in the evaporator 3 is absorbed by the concentrated solution in the absorber 4, and the concentrated solution is diluted with the refrigerant vapor to become a dilute solution. The dilute solution is sent to the low-temperature regenerator 2 through the dilute solution pipe 19 by the pump P2, and is heated and cooled by the low-temperature water flowing through the heat exchange tube 18C.
It is concentrated to an intermediately concentrated solution. The refrigerant vapor generated at that time moves to the condenser 1 and is cooled and condensed by the cold water flowing in the heat exchange tube 18B to become a refrigerant drain.

A part of the intermediate concentrated solution in the low temperature regenerator 2 is sent to the high temperature regenerator 5 by the pump 3 through the intermediate concentrated solution pipe 14B. When the amount of heat and the temperature of the low-temperature water in the low-temperature water pipe 10 are low, the high-concentration solution is heated and concentrated in the high-temperature regenerator 5 using high potential energy such as gas, oil, or steam as a heat source.

The refrigerant vapor generated during the concentration of the intermediate concentrated solution passes through the refrigerant vapor pipe 15 and enters the heat exchanger 6 exclusively for hot water, and condenses on the heat exchange tube 18E. Gives heat to flowing low-temperature water. The condensed refrigerant is sent to the condenser 1 through the refrigerant drain pipe 11, and is sent to the evaporator 3 through the refrigerant drain pipe 12 together with the refrigerant generated in the condenser 1. When the calorific value and temperature of the intermediate hot water can cover the refrigeration load, the high temperature regenerator 5 is not operated.

The concentrated solution or the intermediate concentrated solution concentrated in the high-temperature regenerator 5 passes through the concentrated solution pipe 20, and is mixed with the intermediate concentrated solution generated in the low-temperature regenerator 2 in the intermediate concentrated solution pipe 14A. And is used to absorb refrigerant vapor.

In the embodiment shown in FIG. 2, the refrigerant condensed in the heat exchanger 6 dedicated to hot water in FIG. 1 is introduced into the heat exchange tube 18F installed in the low-temperature regenerator 2, and the refrigerant is diluted. It is a configuration of an absorption refrigerator with a hot water generator used for heating and concentrating a solution. The refrigerant used for heating and concentrating the dilute solution in the heat exchange tube 18F is the refrigerant drain pipe 11
To the condenser 1 and cooled and condensed by cold water flowing in the heat exchange tube 18B to become a refrigerant drain.

[0018]

As described above, according to the present invention, an absorption refrigerator having the following excellent effects can be provided.

(1) By using a high-temperature regenerator having a heat exchanger exclusively for hot water, when applied to an absorption refrigerator using low-medium-temperature water, the basic internal cycle conditions of the single-effect absorption refrigerator are basically changed. 100% medium and low temperature water without
Can be used.

(2) Further, the design is easy because the single-effect absorption refrigerating machine is based on the above (1).

(3) In addition, since a stable refrigerating capacity can be exhibited with almost no increase in the heat transfer area as compared with the above (1), miniaturization is easy.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of an absorption refrigerator according to the present invention.

FIG. 2 is a diagram showing a configuration example of an absorption refrigerator according to the present invention.

FIG. 3 is a diagram showing a configuration example of a conventional single-effect absorption refrigerator.

FIG. 4 is a diagram showing a configuration example of a conventional double effect absorption refrigerator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Condenser 2 Low temperature regenerator 3 Evaporator 4 Absorber 5 High temperature generator 6 Heat exchanger only for hot water 7A, 7B Solution heat exchanger 8 Cooling water pipe 9 Cold water pipe 10 Medium / low temperature water pipe 11 Refrigerant drain pipe 12 Refrigerant drain pipe 13 Refrigerant liquid piping 14 Intermediate concentrated solution piping 15 Refrigerant vapor piping 16 Refrigerant control valve 17 Heating medium control valve 18A, 18B, 18C, 18D, 18E, 18F
Heat exchange tube 19 Dilute solution pipe 20 Concentrated solution pipe P1, P2, P3 Pump

Claims (2)

[Claims] 1. An absorber, an evaporator, a condenser, a low-temperature regenerator,
An absorption refrigerator comprising a solution heat exchanger, a solution pump, a refrigerant pump and piping connecting them, and using hot water as a heat source of the regenerator, wherein a hot water heat exchanger for heating hot water as a heat source of the regenerator, An absorption refrigerator comprising: a high-temperature regenerator for concentrating a refrigerant solution from the regenerator using energy as a heat source and supplying generated refrigerant vapor to the hot water heat exchanger. 2. The apparatus according to claim 1, wherein the apparatus has a mode in which the high-temperature regenerator is operated alone without using the hot water as a heat source and a mode in which the high-temperature regenerator is used as a heat source while heating the hot water. Absorption refrigerator