JPH0354377Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a dual-effect absorption chiller/heater, and more particularly to a dual-effect absorption chiller/heater with an improved low-temperature regenerator.

[Background of the idea]

First, the configuration of the dual-effect absorption chiller/heater will be explained using FIG. The high temperature regenerator 1 heats a dilute solution using a heat source 2 such as a burner to generate refrigerant vapor. The high temperature regenerator separator 3 separates the refrigerant vapor from the high temperature regenerator 1 and the intermediate concentration solution after the refrigerant vapor separation. The low-temperature regenerator 4 uses the refrigerant vapor sent out from the separator 3 as a heat source to
Heat and concentrate the intermediate concentration solution sent from the
Generates refrigerant vapor. The low temperature regenerator separator 5 is
The refrigerant vapor generated in the low temperature regenerator and the concentrated solution are separated. The condenser 6 condenses and cools the refrigerant vapor and liquid refrigerant flowing from the regenerators 1 and 4 through the cooling water heat exchanger 7 . The evaporator 8 uses latent heat when the liquid refrigerant from the condenser 6 evaporates to obtain heat from the cold/hot water heat exchanger 9 . Absorber 10
cools the solution and absorbs refrigerant vapor from the evaporator 8. Reference numerals 11 and 12 denote a low temperature heat exchanger and a high temperature heat exchanger for exchanging heat of the solution, and these are connected by piping to form a cooling circuit.

In the above configuration, there are two types of low temperature regenerator 4, one shown in FIG. 3 and the other shown in FIG. 4. The low-temperature regenerator shown in FIG. 3 is of the shell-and-coil type, in which refrigerant vapor as a heating medium flows through a spiral coil 16 installed in the container of the low-temperature regenerator 4 and heats up. After being replaced, it condenses into liquid refrigerant and flows out of the low-temperature regenerator 4. Further, the solution as the medium to be heated flows in through the pipe 17 and is heated and condensed, and the refrigerant vapor flows through the pipe 18.
The high concentration solution passes through the pipe 19 to the low temperature regenerator 4.
This method allows the water to flow out of the room.

The low-temperature regenerator shown in Fig. 4 is a shell-and-tube system, in which the heated refrigerant vapor entering the low-temperature regenerator 4 is diverted to a tube 21 installed in the shell by an inlet header 20, and heats up. After the exchange, it becomes condensed water and flows out from the outlet header 22. On the other hand, the solution on the heated side flows into the shell from the inlet pipe 23, is heated and concentrated by the refrigerant vapor flowing inside the tube 21, and flows out of the shell from the outlet pipe 24. Here, reference numeral 25 is a diagonal board for disturbing the flow of the solution and improving heat exchange efficiency.

Now, since the low-temperature regenerator 4 of the above-mentioned type all heats and condenses the solution by the liquid reservoir method, the volume of the low-temperature regenerator 4 becomes large and the amount of accumulated solution increases. As a result, the space occupied by the low-temperature regenerator increases, making it inevitable to increase the size of the absorption refrigerator, resulting in increased costs.

[Purpose of invention]

An object of the present invention is to provide a dual-effect absorption chiller-heater in which the low-temperature regenerator in the dual-effect absorption chiller-heater can be downsized and the amount of accumulated solution can be reduced.

[Summary of the idea]

In order to achieve the above object, the dual-effect absorption chiller/heater according to the present invention is a low-temperature absorption water cooler that performs heat exchange between high-temperature steam from the gas-liquid separator on the high-temperature regenerator side and intermediate concentrated solution from the high-temperature heat exchanger. In a dual-effect absorption chiller/heater equipped with a regenerator, the low-temperature regenerator includes a plurality of plate channel bodies formed by a pair of plates stacked at intervals, and communicating with each branch channel body. A heat exchange unit is provided with a main flow path provided at one end and the other end of the branch flow path body, respectively, and a box-like container housing the heat exchange unit, and the high temperature is provided on one side of the main flow path. It is characterized in that piping is provided for supplying either the steam or the intermediately concentrated solution, and the other side of the container is provided with piping for supplying the other of the high temperature steam or the intermediately concentrated solution, resulting in a so-called plate fin system. The plate preferably has a corrugated or hemispherical protrusion in order to improve the efficiency of heat exchange.

[Example of idea]

Next, an embodiment of the dual-effect absorption chiller/heater according to the present invention will be described based on the drawings.

FIG. 1 shows the configuration of a low-temperature regenerator used in a dual-effect absorption chiller/heater according to the present invention. Note that the configuration other than the low-temperature regenerator is the same as that in FIG. 2, so the explanation will be omitted.

As shown in FIG. 1, the low temperature regenerator 4 is roughly divided into a heat exchange unit 100 and a heat exchange unit 100.
It consists of a container 200 that stores 00. The heat exchange unit 100 has a main channel body 26 which has a plurality of branch passage bodies 25 each formed by a pair of plates arranged in parallel, stacked one on top of the other at a predetermined interval, and which communicates the branch passage bodies 25 together. , 27 are provided at one end and the other end of the branch channel body 25, respectively, and are integrated.
This heat exchange unit 100 is housed in a container 200, and a solution inlet pipe 28 and a solution outlet pipe 29 are provided at one end and the other end of the container 200, respectively.
is installed.

Now, the gas-liquid separator 3 is connected to the inlet 30 of the main channel body 26.
When the high-pressure refrigerant vapor separated by is supplied, it is sent in the direction of flow A shown in FIG. 1, flows through each branch channel body 25, and is discharged from the outlet 31. At this time, when the intermediate concentrated solution from the high temperature heat exchanger 12 is supplied to the solution inlet pipe 28, the flow B shown in FIG.
The solution is sent in the direction of the solution, passes between the branch channels 25 and is discharged from the solution outlet pipe 29. In this way, heat exchange is performed by the refrigerant vapor flowing in the direction A and the intermediate concentrated solution flowing in the opposite direction in the direction B. Therefore, in order to improve the efficiency of heat exchange, it is preferable to make the plate corrugated in cross section or provide a hemispherical protrusion to increase the contact area and generate turbulent flow. Note that the refrigerant is condensed and discharged from the outlet 31 as a liquid refrigerant, and is sent to the condenser 6. On the other hand, the intermediate concentrated solution is heated and concentrated while flowing in the direction of B.
The concentrated solution and refrigerant vapor are discharged from the solution outlet pipe 29 and rise through the solution outlet pipe 29 in a gas-liquid mixed state due to the bubble pump action, and are separated into a concentrated solution and refrigerant vapor in the low temperature regenerator separator 5. . The refrigerant vapor then flows into the condenser 6 and the concentrated solution flows into the low temperature heat exchanger 11. Thereafter, cold water will be obtained from the cold/hot water heat exchanger 9 by the same operation as in the conventional case.

[Effect of idea]

As described above, according to the present invention, since the low-temperature regenerator is configured by the so-called plate fin system, the heat transfer area per unit volume is large, and as a result, the installation space is small. Furthermore, the amount of solution retained can be reduced.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the low temperature regenerator according to the present invention, Figure 2 is a system diagram showing the general configuration of a dual-effect absorption chiller/heater, and Figure 3 is a diagram of a conventional low temperature regenerator. FIG. 4 is a sectional view showing another conventional example. 3...High temperature regenerator separator, 4...Low temperature regenerator,
5...Low temperature regenerator separator, 6...Condenser, 12...
...High temperature heat exchanger, 100...Heat exchange unit, 2
00... Container, 25... Branch channel body, 26, 27...
... Main channel body, 28 ... Solution inlet pipe, 29 ... Solution outlet pipe, 30 ... Inlet, 31 ... Outlet, A ... Steam flow direction, B ... Solution flow direction.

Claims (1)

[Claims for Utility Model Registration] (1) Double-effect absorption system equipped with a low-temperature regenerator that exchanges heat between the high-temperature steam from the gas-liquid separator on the high-temperature regenerator side and the intermediate concentrated solution from the high-temperature heat exchanger. In the cold/hot water machine, the low temperature regenerator has a plurality of branch passage bodies formed by a pair of plates stacked at intervals, and a main passage communicating with each branch passage body is connected to the branch passage body. It is equipped with a heat exchange unit provided at one end and the other end, and a box-like container for storing the heat exchange unit, and has either the high temperature steam or the intermediate concentrated solution on one side of the main flow path. A dual-effect absorption chiller-heater, characterized in that one side of the container is provided with piping for supplying the other of the high-temperature steam or the intermediate concentrated solution. (2) Utility Model Registration The dual-effect absorption chiller/heater according to claim 1, wherein the pair of plates have a corrugated cross section. (3) Utility Model Registration The dual-effect absorption chiller/heater according to claim 1, wherein the pair of plates have protrusions having a hemispherical cross section.