JPH04268175A - Absorption heat source device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption heat source device.

0002

[Prior Art] As a heat source device used in air conditioning equipment,
There are absorption types. Conventionally, this type of absorption heat source device (
More specifically, a water cooler/heater (water cooler/heater) has an evaporator, an absorber, a regenerator, a condenser, etc., and performs a refrigeration cycle during cooling, and a heating cycle during heating.

[0003] Furthermore, in the above-mentioned cooling cycle, the following actions of evaporation, absorption, regeneration, and condensation of the refrigerant are carried out to produce cold water for cooling through the absorption refrigeration cycle. On the other hand, in the heating cycle, the absorption liquid is heated in a regenerator using fuel, high-temperature steam, and water, and the generated steam is used to directly heat and produce hot water for warming purposes.

0004

[Problems to be Solved by the Invention] According to the above-mentioned conventional configuration, in the heating cycle, although the device itself has the function of a heat pump, heat is pumped up from a low-temperature heat source due to the crystallization limit of the absorption liquid. Therefore, there was a problem that the heat efficiency was poor and it was uneconomical.

[0005] Accordingly, an object of the present invention is to provide an absorption type heat source device that can utilize a low-temperature heat source even in a heating cycle.

[0006]

[Means for Solving the Problems] In order to solve the above problems, an absorption type heat source device of the present invention includes an evaporator to which a heat exchange fluid is supplied, an evaporator/absorber, an absorber, a regenerator, a regenerator and condenser, a condenser, a communication pipe that communicates the inside of the condenser with the inside of the regenerator and condenser, and transfers the refrigerant evaporated in the regenerator to a heat transfer tube in the regenerator and condenser. A refrigerant transfer pipe that transfers the refrigerant from the heat transfer tube in the regeneration/condenser to the condenser, and a refrigerant transfer pipe that transfers the refrigerant from the condenser to the evaporator and the heat transfer tube of the evaporator/absorber. A refrigerant transfer pipe that transfers the concentrated absorption liquid separated by the regenerator to the absorber and the regeneration/condenser, and a concentrated absorption liquid transfer pipe that transfers the concentrated absorption liquid separated by the regenerator to the regeneration/condenser. a concentrated absorption liquid transfer pipe that transfers the refrigerant into the absorber and the evaporator/absorber, and a dilute absorption liquid transfer pipe that transfers the diluted diluted absorption liquid by absorbing the refrigerant in the absorber to the regenerator. A dilute absorption liquid transfer pipe that absorbs the refrigerant in the evaporator/absorber and transfers the diluted diluted absorption liquid to the regeneration/condenser, and a heat exchange fluid in each heat transfer tube in the absorber and the condenser. and a heat exchange fluid transfer pipe for transferring the heat exchange fluid to the regenerator and absorber, and when the heating cycle is in operation, the absorption liquid is circulated between the regenerator and the absorber, and the regenerator/condenser and the evaporator/absorber During the operation of the cooling cycle, the refrigerant evaporated in the evaporator is directly transferred to the absorber, and the concentrated absorption liquid separated in the regenerator is regenerated and condensed. The liquid is transferred into the absorber through a container.

[0007]

[Operation] In the above structure, during heating operation, the absorption liquid is circulated independently between the absorber and the regenerator, and between the evaporator/absorber and the regenerator/condenser.

That is, the refrigerant evaporated and separated in the regenerator is condensed in the regenerator/condenser and the condenser, and then transferred to the evaporator and the evaporator/absorber via the refrigerant transfer pipe. In the evaporator, the refrigerant is evaporated by, for example, low-temperature river water, and the evaporated refrigerant is transferred to the evaporator/absorber, where it is absorbed by the absorption liquid and generates heat, which causes it to pass through the heat transfer tube. Evaporate the refrigerant. The refrigerant discharged from the heat transfer tube is transferred into the absorber, where the original absorption action takes place and heats the hot water, which is the heat exchange fluid, that passes through the heat transfer tube. Furthermore, when the hot water heated here passes through a heat transfer tube in the condenser, it absorbs condensation heat and is further heated.

[0009] In this way, since absorption is performed in two stages,
Heating can be performed using a low-temperature heat source, such as river water, as the heat source fluid for the evaporator. In addition, during cooling operation, the normal cooling cycle is performed by performing the absorption cycle using only the regenerator, condenser, evaporator, low-temperature regenerator, and absorber without using the evaporator/absorber. let

0010

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. The absorption type heat source device according to this embodiment includes an evaporator 1 having a heat exchanger tube 11 and into which a heat exchange fluid is supplied, an evaporator/absorber 2 having a heat exchanger tube 12 disposed therein, an absorber 3 in which a heat exchanger tube 13 is arranged;
The regenerator 4, the regenerator/condenser 5 in which the heat transfer tube 15 is arranged, the condenser 6 in which the heat transfer tube 16 is arranged, and the inside of this condenser 6 and the inside of the regenerator/condenser 5 are communicated. a first refrigerant transfer pipe 22 that transfers the refrigerant evaporated in the regenerator 4 into the heat exchanger tube 15 in the regenerator/condenser 5; A second refrigerant transfer pipe 23 transfers the refrigerant to the condenser 6, and a third refrigerant transfer pipe 24 transfers the refrigerant from the condenser 6 into the heat transfer tubes 12 of the evaporator 1 and the evaporator/absorber 2. A fourth refrigerant transfer pipe 25 is provided with a valve 41, and one end is connected to the third refrigerant transfer pipe 24 midway, and the other end is connected to the heat transfer pipe 12 in the evaporator/absorber 2; A fifth valve is provided with an on-off valve 42 to transfer the refrigerant in the evaporator 1 to the evaporator/absorber 2.
A refrigerant transfer pipe 26 and a heat transfer pipe 12 in the evaporator/absorber 2
a sixth refrigerant transfer pipe 27 that transfers the refrigerant inside the absorber 3 into the absorber 3; and a first refrigerant transfer pipe 27 with an on-off valve 43 interposed in the middle to transfer the concentrated absorption liquid separated in the regenerator 4 into the absorber 3. A second condensed liquid transfer pipe 31 and a second condensed liquid transfer pipe 31 having an on-off valve 44 interposed therebetween, one end of which is connected to the first concentrated absorption liquid transfer pipe 31 and the other end connected to the regenerator and condenser 5. Concentrated absorption liquid transfer tube 3
2, a third concentrated absorption liquid transfer pipe 33 with an on-off valve 45 interposed in the middle to transfer the concentrated absorption liquid regenerated in the regeneration/condenser 5 to the evaporator 3, and a third concentrated absorption liquid transfer pipe 33 with an on-off valve 46 interposed in the middle. A fourth concentrated absorption liquid transfer pipe 34 is installed, and one end is connected to the middle of the third concentrated absorption liquid transfer pipe 33, and the other end is connected to the evaporator/absorber 2, and a solution pump 71 and an on-off valve are connected to the middle of the fourth concentrated absorption liquid transfer pipe 34. 47 is interposed, and a first dilute absorption liquid transfer pipe 36 that transfers the diluted diluted absorption liquid by absorbing the refrigerant in the absorber 3 to the regenerator 4;
A second dilute absorption liquid transfer pipe, in which a solution pump 72 and on-off valves 48 and 49 are interposed, and which transfers the diluted diluted absorption liquid by absorbing the refrigerant in the evaporator/absorber 2 to the regeneration/condenser 5 37, and a first diode, in which on-off valves 51 and 52 are interposed in the middle, respectively, and the first dilute absorbent liquid transfer pipe 36 and the second dilute absorbent liquid transfer pipe 37 are connected to each other at two points in the middle.
and a refrigerant bypass that bypasses the evaporator/absorber 2 by connecting the second absorption liquid bypass pipes 61 and 62 and the fifth refrigerant transfer pipe 26 and the sixth refrigerant transfer pipe 27 with an on-off valve 53 interposed therebetween. a first heat exchange fluid transfer tube 38 for transferring the heat exchange fluid into the heat exchange tube 11 of the evaporator 1 and a first heat exchange fluid transfer tube 38 for transferring the heat exchange fluid into each heat exchange tube 13, 16 of the absorber 3 and condenser 6; a second heat exchange fluid transfer pipe 39, a refrigerant circulation pipe 28 having a refrigerant pump 73 interposed therebetween to circulate and move the refrigerant in the evaporator 1, Heat exchange is performed between the absorbent liquid transfer pipe 36 and between the third concentrated absorbent liquid transfer pipe 33 and the second dilute absorbent liquid transfer pipe 37, and the heat of the concentrated absorbent liquid is recovered to the dilute absorbent liquid. It consists of heat exchangers 7 and 8 for.

Next, the operation of the above configuration will be explained. ■During heating operation (during heating cycle operation) During heating operation, on-off valves 44, 45, 51, 52, 53
is closed (blacked out area in the diagram), and the remaining on-off valves are opened, allowing the absorption liquid to flow into the absorber 3.
and the regenerator 4, and between the evaporator/absorber 2 and the regenerator/condenser 5.

That is, the refrigerant evaporated and separated in the regenerator 4 is doubly condensed in the regenerator/condenser 5 and the condenser 6, and then transferred to the evaporator 1 via the third and fourth refrigerant transfer pipes 24 and 25. and transferred to the evaporator/absorber 2.

In the evaporator 1, the refrigerant is evaporated by a low-temperature heat source that is a heat exchange fluid, such as low-temperature river water, and the evaporated refrigerant is transferred to the evaporator/absorber 2, where it is absorbed by an absorption liquid. This heat generation causes the refrigerant passing through the heat transfer tubes 12 to evaporate. And this heat exchanger tube 12
The refrigerant discharged from the absorber 3 is transferred to the absorber 3, where the original absorption action takes place and heats the hot water, which is the heat exchange fluid, passing through the heat exchanger tubes 13. Moreover, when the hot water heated here passes through the heat transfer tube 16 in the condenser 6, it absorbs condensation heat and is further heated. For example, 40℃ hot water is 47℃
is heated to. Note that the river water is cooled, for example, from 12°C to 7°C.

[0014] Since absorption is performed in two stages in this way, heating can be performed using a low-temperature heat source, such as river water. Heat source heat amount is 1.0, output hot water heat amount is 1.5
becomes.

On the other hand, the diluted absorption liquid that has been diluted by absorbing the absorption liquid in the absorber 3 is transferred to the regenerator 4 via the first diluted absorption liquid transfer pipe 36 to be heated and regenerated. The diluted absorption liquid similarly generated in step 2 is transferred to the regeneration/condenser 5 via the second diluted absorption liquid transfer pipe 37, where it is heated by the heat of the refrigerant vapor from the regenerator 4 and regenerated. .

Of course, the refrigerant evaporated in the regeneration/condenser 5 is transferred to the condenser 6 via the communication pipe 21 and condensed there. ■During cooling operation (during cooling cycle operation) During cooling operation, unlike during heating operation described above, only the on-off valves 44, 45, 51, 52, and 53 are opened, and the remaining on-off valves are closed. and the absorption liquid is transferred only to the absorber 3.

That is, the refrigerant evaporated in the regenerator 4 passes through the regenerator/condenser 5 and the condenser 6, and is condensed.
will be transferred to. Then, the cold water that is the heat exchange fluid passing through the heat exchanger tube 11 is cooled. On the other hand, the refrigerant evaporated in the evaporator 1 is transferred to the absorber 3 via the refrigerant bypass pipe 63.
and absorbed into the absorption liquid. The absorption liquid generated here passes through the first dilute absorption liquid transfer pipe 36, the first absorption liquid bypass pipe 61, the second dilute absorption liquid transfer pipe 37, the second absorption liquid bypass pipe 62, and the first dilute absorption liquid transfer pipe 36. It is transferred into the regenerator 4 through the regenerator 4. The refrigerant evaporated in the regenerator 4 is transferred to the regenerator/condenser 5 as described above, while the concentrated absorption liquid in the regenerator 4 is transferred to the first concentrated absorption liquid transfer pipe 31 and the second concentrated absorption liquid transfer pipe. It is transferred to the regenerator/condenser 5 via the pipe 32 and then transferred to the absorber 3 via the third concentrated absorption liquid transfer line 33.

Note that the cooling water such as river water cools the inside of the absorber 3 and the condenser 6 via the second heat exchange fluid supply pipe 39.

[0019]

As described above, according to the configuration of the present invention, when performing heating operation, an evaporator/absorber and a regenerator/condenser are installed between the absorber and the evaporator, and the absorption liquid is circulated. As a result, absorption can be carried out in two stages, and therefore, heating can be performed using a low-temperature heat source, such as river water, as the heat source fluid for the evaporator, which can greatly improve thermal efficiency. Economical.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an absorption heat source device according to an embodiment of the present invention.

[Explanation of symbols]

1 Evaporator 2 Evaporator and absorber 3
Absorber 4 Regenerator 5 Regenerator and condenser 6
Condensers 11-13 Heat transfer tubes 15, 16 Heat transfer tubes 21 Communication tubes 22-27 Refrigerant transfer tubes 31-34 Concentrated absorption liquid transfer tubes 36, 37 Absorption liquid transfer tubes 41-49 On-off valves 51-53 On-off valves 61-63 Bypass tube

Claims (1)

[Claims] Claims 1: An evaporator to which a heat exchange fluid is supplied, an evaporator/absorber, an absorber, a regenerator, a regenerator/condenser, a condenser, and the inside of the condenser and the regenerator/condenser. a refrigerant transfer pipe that transfers the refrigerant evaporated in the regenerator to the heat transfer tube in the regenerator and condenser, and a refrigerant transfer tube that transfers the refrigerant from the heat transfer tube in the regenerator and condenser to the a refrigerant transfer pipe that transfers the refrigerant to the condenser; a refrigerant transfer pipe that transfers the refrigerant from the condenser into the evaporator and the heat transfer tube of the evaporator and absorber;
A concentrated absorption liquid transfer pipe for transferring the concentrated absorption liquid separated by the regenerator into the absorber and the regeneration/condenser, and a concentrated absorption liquid transfer pipe for transferring the concentrated absorption liquid from the regeneration/condenser to the absorber and the evaporation/condenser. A concentrated absorption liquid transfer pipe that transfers the refrigerant into the absorber, a dilute absorption liquid transfer pipe that transfers the diluted diluted absorption liquid by absorbing the refrigerant in the absorber to the regenerator, and a dilute absorption liquid transfer pipe that transfers the refrigerant to the regenerator. A dilute absorption liquid transfer tube for transferring the absorbed and diluted diluted absorption liquid to the regeneration/condenser, and a heat exchange fluid transfer tube for transferring the heat exchange fluid to each heat transfer tube in the absorber and the condenser. and when the heating cycle is activated, the absorption liquid is circulated between the regenerator and the absorber, and the absorption liquid is circulated between the regeneration/condenser and the evaporator/absorber. There is no such thing, and when the cooling cycle is activated,
The refrigerant evaporated by the evaporator is directly transferred to the absorber, and the concentrated absorption liquid separated by the regenerator is transferred to the absorber via the regenerator/condenser. absorption type heat source device.