JP2543258B2 - Absorption heat source device - Google Patents

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]

2. Description of the Related Art As a heat source device used for air conditioning equipment,
There is an absorption type. Conventionally, this type of absorption heat source device (more specifically, a chiller / heater) has an evaporator, an absorber, a regenerator, a condenser, and the like, and during cooling, a refrigeration cycle is performed and heating is performed. At times, a heating cycle was taking place.

Further, in the above cooling cycle, the operations of evaporation of refrigerant → absorption → regeneration → condensation are performed to produce cold water for cooling by the absorption refrigeration cycle. On the other hand, in the heating cycle, the absorbent is heated in the regenerator by fuel, high-temperature steam, and water, and the generated steam directly heats and produces hot water for warming.

[0004]

According to the above conventional structure, in the heating cycle, although the device itself has the function of the heat pump, the heat is pumped from the low temperature heat source due to the crystallization limit of the absorbing liquid. However, there is a problem that it is uneconomical because the heat efficiency is poor because it cannot be used for heating.

Therefore, an object of the present invention is to provide an absorption heat source device which can utilize a low temperature heat source even in a heating cycle.

[0006]

In order to solve the above-mentioned problems, an absorption heat source device of the present invention comprises an evaporator to which a heat exchange fluid is supplied, an evaporation / absorber, an absorber, a regenerator, A regeneration / condenser, a condenser, a communication pipe for communicating the inside of the condenser with the regeneration / condenser, and a refrigerant evaporated in the regenerator into a heat transfer tube in the regeneration / condenser. And a refrigerant transfer pipe for transferring the refrigerant from the heat transfer pipe in the regeneration / condenser to the condenser, and the refrigerant from the condenser in the evaporator and the heat transfer pipe of the evaporator / absorber. A refrigerant transfer pipe for transferring the concentrated absorption liquid separated by the regenerator into the absorber and the regeneration / condensation device, and a concentrated absorption liquid from the regeneration / condenser A concentrated absorption liquid transfer pipe for transferring the gas into the absorber and the evaporation / absorber, and the absorber. A rare absorbent transfer pipe for absorbing the refrigerant and transferring the diluted diluted absorbent to the regenerator, and a diluted absorbent absorbed by the refrigerant in the evaporator / absorber and transferred to the regenerator / condenser And a heat exchange fluid transfer pipe for transferring a heat exchange fluid into each heat transfer pipe in the absorber and the condenser, and at the time of heating cycle operation, the regenerator and the absorber. The absorption liquid is circulated between the regeneration / condenser and the evaporation / absorption device, and is evaporated in the evaporator during the cooling cycle operation. The refrigerant is directly transferred to the absorber, and the concentrated absorbent separated by the regenerator is transferred into the absorber via the regeneration / condenser.

[0007]

In the above structure, during the heating operation, the absorbing liquid is circulated independently between the absorber and the regenerator and between the evaporation / absorber and the regeneration / 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, for example, the low temperature river water evaporates the refrigerant, and the evaporated refrigerant is transferred into the evaporation / absorber where it is absorbed by the absorbing liquid to generate heat and passes through the heat transfer tube due to this heat generation. Evaporate the refrigerant. Then, the refrigerant discharged from the heat transfer tube is transferred into the absorber, where the original absorbing action is performed to heat the hot water that is the heat exchange fluid passing through the heat transfer tube. Further, the hot water heated here takes away the heat of condensation when passing through the heat transfer tube in the condenser, and is further heated.

Thus, since the absorption is performed in two stages,
Heating can be performed using a low-temperature heat source such as river water as a heat source fluid of the evaporator. Also, during cooling operation, the normal cooling cycle is performed by using only the regenerator, condenser, evaporator, low temperature regenerator and absorber to perform the absorption cycle without using the evaporator / absorber. Let

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The absorption heat source device according to the present embodiment has an evaporator 1 having a heat transfer tube 11 and a heat exchange fluid being supplied into the heat transfer tube 11, and an evaporator / absorber 2 having a heat transfer tube 12 arranged therein. An absorber 3 in which a heat transfer 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 the condenser 6 and the regenerator / condenser 5 are communicated with each other. A communication pipe 21 for allowing the refrigerant to evaporate, a first refrigerant transfer pipe 22 for transferring the refrigerant evaporated in the regenerator 4 into the heat transfer tube 15 in the regeneration / condenser 5, and a refrigerant from the heat transfer tube 15 in the regeneration / condenser 5 Second refrigerant transfer pipe 23 for transferring the refrigerant to the condenser 6, a third refrigerant transfer pipe 24 for transferring the refrigerant from the condenser 6 into the heat transfer tubes 12 of the evaporator 1 and the evaporator / absorber 2, and opening / closing in the middle thereof A fourth refrigerant transfer pipe 25, in which a valve 41 is interposed, one end of which is connected to the middle of the third refrigerant transfer pipe 24 and the other end of which is connected to the heat transfer pipe 12 in the evaporator / absorber 2, A fifth valve which is provided with an on-off valve 42 and transfers the refrigerant in the evaporator 1 to the evaporator / absorber 2.
The refrigerant transfer pipe 26 and the heat transfer pipe 12 in the evaporation and absorber 2
A sixth refrigerant transfer pipe 27 for transferring the refrigerant in the absorber 3 into the absorber 3.
And a first concentrated absorbent transfer pipe 31 for transferring the concentrated absorbent separated by the regenerator 4 into the absorber 3, and an on-off valve 44 installed on the way. A second concentrated absorbent transfer pipe 32, one end of which is connected to the first concentrated absorbent transfer pipe 31 and the other end of which is connected to the regeneration / condenser 5, and an on-off valve 45 is interposed in the middle. A third concentrated absorbent transfer pipe 33 for transferring the concentrated absorbent regenerated by the regeneration / condenser 5 to the evaporator 3 and an opening / closing valve 46 in the middle, and one end of the third concentrated absorbent transfer The fourth concentrated absorbent transfer pipe 34, which is connected to the middle of the pipe 33 and the other end of which is connected to the evaporator / absorber 2, the solution pump 71 and the on-off valve 47 are interposed, and the refrigerant is absorbed by the absorber 3. The first rare absorbent transfer pipe 36 that transfers the diluted rare earth absorbing solution to the regenerator 4
And a solution pump 72 and opening / closing valves 48, 49 on the way, and a second rare absorption liquid which transfers the diluted rare absorption liquid which has absorbed the refrigerant in the evaporation / absorber 2 to the regeneration / condenser 5. The transfer pipe 37 and opening / closing valves 51, 52 are provided in the middle of the transfer pipe 37, and the first rare absorbent transfer pipe 36 and the second rare absorbent transfer pipe 37 are connected to each other at two points. A refrigerant bypass pipe in which the second absorbing liquid bypass pipes 61 and 62 and an opening / closing valve 53 are provided in the middle to connect the fifth refrigerant transfer pipe 26 and the sixth refrigerant transfer pipe 27 to bypass the vaporizer / absorber 2. 63, a first heat exchange fluid transfer pipe 38 for transferring a heat exchange fluid into the heat transfer pipe 11 of the evaporator 1, and a heat exchange fluid into the heat transfer pipes 13 and 16 of the absorber 3 and the condenser 6, respectively. The second heat exchange fluid transfer pipe 39 and the refrigerant pump 73 are installed in the middle. A refrigerant circulation pipe 28 for circulating moving refrigerant in the evaporator 1 Te, the first concentrated absorption liquid flow pipe 31
And the first absorption liquid transfer pipe 36, and between the third concentrated absorption liquid transfer pipe 33 and the second diluted absorption liquid transfer pipe 37, heat is exchanged with each other, and the heat of the concentrated absorption liquid is exchanged. And heat exchangers 7 and 8 for recovery.

Next, the operation of the above structure will be described. During heating operation (during heating cycle operation) During heating operation, the on-off valves 44, 45, 51, 52, 53
Is closed (in the figure, it is painted out in black), and the remaining on-off valve is opened to absorb the absorbing liquid into the absorber 3.
And the regenerator 4, and between the evaporator / absorber 2 and the regenerator / condenser 5 are independently circulated.

That is, the refrigerant evaporated and separated in the regenerator 4 is double condensed in the regeneration / condenser 5 and the condenser 6, and then the evaporator 1 is passed through the third and fourth refrigerant transfer pipes 24 and 25. And transferred to the evaporation / absorber 2.

In the evaporator 1, a low-temperature heat source which is a heat exchange fluid, for example, low-temperature river water evaporates the refrigerant, and the evaporated refrigerant is transferred into the evaporation / absorber 2 where it is absorbed by the absorbing liquid. The heat transfer tube 12 is generated by this heat generation.
The refrigerant passing through is evaporated. And this heat transfer tube 1
The refrigerant discharged from 2 is transferred into the absorber 3, where the original absorbing action is performed and the hot water that is the heat exchange fluid passing through the heat transfer tube 13 is heated. Further, the hot water heated here removes the heat of condensation when passing through the heat transfer tube 16 in the condenser 6, and is further heated. For example, warm water at 40 ° C is 47
Heated to ℃. In addition, river water is, for example, 12 ℃ to 7 ℃
To be cooled.

As described above, since the absorption is performed in two stages, it is possible to perform heating by using a low temperature heat source, for example, river water, and in combination with the double-effect regeneration, the drive is performed. Heat source calorific value is 1.0, but output hot water calorific value is 1.
It becomes 5.

On the other hand, the diluted absorbent absorbed by the absorber 3 and diluted is transferred to the regenerator 4 through the first diluted absorbent transfer pipe 36 to be heated and regenerated, and the evaporation / absorber is also used. The rare absorbent similarly generated in 2 is transferred to the regeneration / condenser 5 via the second rare absorbent transfer pipe 37, where it is heated by the heat of the refrigerant vapor from the regenerator 4 to be regenerated. .

Of course, the refrigerant evaporated in the regeneration / condenser 5 is transferred into the condenser 6 through the communication pipe 21 and condensed therein. During cooling operation (during cooling cycle operation) During the cooling operation, unlike the above-described heating operation, only the on-off valves 44, 45, 51, 52, 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 is condensed through the regeneration / condenser 5 and the condenser 6, and the evaporator 1
Be transferred to. Then, here, cold water that is a heat exchange fluid passing through the heat transfer tube 11 is cooled. On the other hand, the refrigerant evaporated in the evaporator 1 passes through the refrigerant bypass pipe 63 and the absorber 3
Is directly transferred to and absorbed by the absorption liquid. The absorption liquid generated here passes through the first diluted absorption liquid transfer pipe 36, the first absorption liquid bypass pipe 61, the second diluted absorption liquid transfer pipe 37, the second absorption liquid bypass pipe 62 and the first diluted absorption liquid transfer pipe 36. It is transferred into the regenerator 4 via. The refrigerant evaporated in the regenerator 4 is transferred to the regeneration / condenser 5 as described above, while the concentrated absorbent in the regenerator 4 is transferred to the first concentrated absorbent transfer pipe 31 and the second concentrated absorbent transfer. It is transferred into the regeneration / condenser 5 via the pipe 32, and then transferred to the absorber 3 via the third concentrated absorbent transfer pipe 33.

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

[0019]

As described above, according to the configuration of the present invention, when performing the heating operation, the evaporator / absorber and the regenerator / condenser are provided between the absorber and the evaporator to circulate the absorbing liquid. Therefore, since the absorption can be performed in two stages and therefore the heat source of the evaporator can be heated by using a low temperature heat source such as river water, the thermal efficiency can be improved. It is economical.

[Brief description of drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 evaporator 2 evaporation-and-absorber 3 absorber 4 regenerator 5 regeneration-condenser 6 condenser 11-13 heat transfer tube 15,16 heat transfer tube 21 communication tube 22-27 refrigerant transfer tube 31-34 concentrated absorbent transfer tube 36 , 37 Absorbing liquid transfer pipe 41-49 Open / close valve 51-53 Open / close valve 61-63 Bypass pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sanae Omori 5-3-8 Nishikujo 5-chome, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd.

Claims (1)

(57) [Claims] 1. An evaporator to which a heat exchange fluid is supplied, an evaporator / absorber, an absorber, a regenerator, a regenerator / condenser, a condenser, the inside of the condenser and the regenerator / condenser. A communication pipe for communicating with the inside, a refrigerant transfer pipe for transferring the refrigerant evaporated in the regenerator into the heat transfer pipe in the regeneration / condenser, and the refrigerant from the heat transfer pipe in the regeneration / condenser A refrigerant transfer pipe for transferring to the condenser, and a refrigerant transfer pipe for transferring the refrigerant from the condenser into the heat transfer pipe of the evaporator and the evaporator / absorber,
A concentrated absorbent transfer pipe for transferring the concentrated absorbent separated in the regenerator into the absorber and the regeneration / condenser, and the concentrated absorbent from the regeneration / condenser in the absorber and the evaporator. A concentrated absorbent transfer pipe for transferring into the absorber, a rare absorbent transfer pipe for transferring a diluted absorbent diluted by absorbing the refrigerant in the absorber to the regenerator, and a refrigerant in the evaporator / absorber Rare absorption liquid transfer pipe for transferring the absorbed and diluted rare absorption liquid to the regeneration / condenser, and heat exchange fluid transfer pipe for transferring the heat exchange fluid into each heat transfer pipe in the absorber and the condenser In addition, while the heating cycle is in operation, the absorbent is circulated between the regenerator and the absorber, and the absorbent is circulated between the regenerator / condenser and the evaporator / absorber. And when the cooling cycle is operating,
The refrigerant evaporated in the evaporator is directly transferred to the absorber, and the concentrated absorbent separated in the regenerator is transferred into the absorber through the regeneration / condenser. Absorption type heat source device.