JPH06201217A - Absorption / VRC hybrid refrigerator - Google Patents

Abstract

(57) [Abstract] [Objective] Absorption / VRC hybrid refrigeration that can significantly reduce energy consumption in the absorption refrigerator by omitting the condenser in the absorption refrigerator and applying the concentration process by VRC in the regenerator. To the machine. [Structure] In an absorption refrigerator comprising an evaporator, an absorber, a regenerator, and a condenser, steam generated in a regenerator 13 is compressed by a compressor 1, and pressure-raised steam is heat-exchanged in the regenerator 13. In the vessel 2, heat exchange was performed with the diluted solution to condense it, and the generated solution was heated to evaporate and concentrate the diluted solution, and the condensate was refluxed to the evaporator 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention omits a condenser in an absorption chiller and uses VRC (vapor recompression) in a regenerator.
The absorption process is designed to reduce the energy consumption of the absorption refrigerator by applying the concentration process
It relates to a VRC hybrid refrigerator.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, for example, there is an absorption refrigerator using an aqueous solution of lithium bromide. The operation of this absorption refrigerator is performed as follows.
That is, (a) the water w as a refrigerant is
The heat source h is supplied to the heat source h to evaporate by exchanging heat with the heat source h, whereby the heat source h is cooled.

(B) The vaporized vapor v is guided to the absorber 12 and absorbed in the concentrated liquid s of LiBr supplied from the pipe line 23. At this time, the absorption liquid rises in temperature due to the latent heat of steam and the absorption heat, but is cooled by the cooling water W supplied from the conduit 26 to maintain a constant temperature. (c) Dilute solution s of LiBr having a reduced concentration due to absorption of vapor v
Is sent from the line 22 to the regenerator 13 by the pump 21.

(D) In the regenerator, the diluted solution of LiBr is heated / distilled in the heating steam S supplied from the pipe 27, only water is evaporated and concentrated (regenerated), and the diluted solution of LiBr is again passed through the pipe 23. It is returned to the absorber 12. (e) The water vapor v evaporated in the regenerator 13 is the condenser 1
4, the water is cooled by the cooling water W supplied through the pipe line 26 and condensed to become condensed water w.

(F) The condensed water w is returned to the evaporator 11 via the pipe line 24. Although the refrigerator has been described above as an example, if the cooling water is regarded as the heat output, it can be regarded as a heat pump.

[0006]

However, in the absorption type refrigerating machine, in the absorption type heat pump or the refrigerating machine, a primary solution for heating is used when performing a distillation operation to regenerate (concentrate) the dilute solution in the regenerator. Uses energy (heat). This heat energy is carried in the distilled vapor and released in the condenser. In the case of refrigeration operations, this is all cooling loss. In the case of a heat pump, this heat can be used as a heat source in the condenser, but the absorption heat generated when the refrigerant is absorbed by the absorbing liquid, which is a feature of the absorption type, constitutes a refrigeration (or heat pump) cycle. , Have been diminished by this regeneration process. That is, a heat source from the outside is required for the regeneration process, which causes a decrease in the coefficient of performance.

The present invention has been made to overcome the above-mentioned conventional drawbacks, and an object thereof is to omit the condenser in the absorption refrigerator and to apply the VRC concentration process in the regenerator. It is to provide an absorption / VRC hybrid refrigerator that can significantly reduce energy consumption in the absorption refrigerator.

[0008]

The absorption / VRC hybrid refrigerator of the present invention which can achieve the above object is an absorption refrigerator comprising an evaporator, an absorber, a regenerator and a condenser, and a regenerator. The generated vapor is compressed by a compressor, and the pressure-increased vapor is heat-exchanged with a dilute solution in a heat exchanger in the regenerator to be condensed. Is refluxed to the evaporator.

Thus, the vapor generated in the regenerator is compressed by the compressor, the vapor whose pressure is increased is heat-exchanged with the dilute solution in the heat exchanger in the regenerator to be condensed, and the dilute solution is heated by the generated heat. The energy consumption in the absorption chiller can be greatly reduced by evaporating and condensing the liquid and condensing the liquid back into the evaporator.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, according to the present invention, the vapor v evaporated in the regenerator 13 is heated by the compression heat pump 50 and used as a heat source of the regenerator 13. That is, the vapor v evaporated in the regenerator 13 is compressed by the compressor 1, and the pressurized vapor v is heat-exchanged and condensed with the dilute solution s in the regenerator 13 by the heat exchanger 2 installed in the regenerator 13, Using the heat generated at that time as a heat source, the solvent of the dilute solution s is evaporated and concentrated. The concentrated liquid is returned to the absorber 12 again via the line 23.

On the other hand, the condensate condensed in the heat exchanger 2 is returned to the evaporator 11 via the expansion valve 3. Here, reference numerals 5, 6, 7, and 8 are pipes of the compressor heat pump 50. Further, the evaporator 11, the absorber 12, and the devices associated therewith are the same as those of the conventional absorption refrigerator, and thus the description thereof will be omitted.

[0012]

As described above, according to the present invention, the vapor generated in the regenerator is compressed by the compressor and the pressure-increased vapor is heat-exchanged with the dilute solution in the heat exchanger in the regenerator to be condensed, Since the dilute solution is heated by the generated heat to evaporate and concentrate, and the condensate is returned to the evaporator, the energy consumption in the absorption refrigerator can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an absorption / RVC hybrid refrigerator according to the present invention.

FIG. 2 is a conceptual diagram of a conventional absorption refrigerator.

[Explanation of symbols]

 1 Compressor 2 Heat Exchanger 11 Evaporator 12 Absorber 13 Regenerator 14 Condenser

Claims (1)

[Claims] 1. In an absorption refrigerator comprising an evaporator, an absorber, a regenerator, and a condenser, vapor generated in the regenerator is compressed by a compressor, and the pressure-increased vapor is subjected to heat exchange in the regenerator. An absorption / VRC hybrid refrigerator, characterized in that a dilute solution is heat-exchanged and condensed in a container, the dilute solution is heated by the generated heat to evaporate and concentrate, and the condensed liquid is refluxed to the evaporator.