JPH09217971A - Absorption water cooler water warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a flying mixture resulting from arrival of a solution, brought into mist, being rolled in steam and arriving at a condenser by a method wherein the solution brought into mist is prevented from being rolled in steam in the vicinity of a spot wherein a line having an intermediate reproducer located therein is connected to a low temperature reproducer. SOLUTION: A branch line L3 running toward a low temperature reproducer 12 is branched from a branch point 16 located between a high temperature solution heat-exchanger 14 and a low temperature solution heat-exchanger 15 of a dilute solution line L1. A pressure reducing valve 17, being a pressure regulating means, and an intermediate reproducer 18 are located in the branch line L3 from the branch 16 side. A sensitive heat and a latent heat are exchanged between a exhaust head line L2 connected to the intermediate reproducer 18 and a dilute solution in the branch line L3. A mist roll-in preventing means A is arranged at a connection part between the branch line L3 and the low temperature reproducer 12. This constitution prevents the absorption solution, brought into mist, from arriving at the condenser in such a state to be rolled in a flow of steam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a pressure adjusting means and an intermediate regenerator at predetermined positions of a solution line, and the intermediate regenerator is a fluid supplied from an external heat source and the intermediate concentration solution line. The present invention relates to an absorption chiller-heater of a type that performs sensible heat / latent heat exchange with a fluid inside and recycles the amount of heat possessed by a fluid supplied from a heat source more efficiently.

[0002]

2. Description of the Related Art In an absorption chiller-heater of this type, a heat exchanger for supplying waste heat is provided in a dilute solution line connecting a high temperature solution heat exchanger and a low temperature solution heat exchanger. In the exchanger, heat exchange (sensible heat / sensible heat exchange) is performed between the exhaust heat from the external heat source (for example, hot waste water) and the dilute solution flowing through the dilute solution line, thus effectively using the exhaust heat. A technique for achieving the above has been proposed by the present applicant (Japanese Patent Application No. 6-73).
428).

Here, as a result of various researches and developments, the present applicant has conducted sensible heat / sensible heat exchange between exhaust heat (warm waste water) and a dilute solution in order to meet recent strict demands for energy saving. A technique in which an intermediate regenerator, which reduces the pressure of the dilute solution and exchanges sensible heat and latent heat with the exhaust heat (warm waste water), is provided in the dilute solution line instead of the heat exchanger for inputting the exhaust heat. Was newly developed.

[0004]

Here, when the refrigerant solution flows into the low temperature regenerator, the pressure decreases,
A gas-liquid two-phase flow (mixed-phase flow) flows into the low-temperature regenerator, and as a result, the mist-ized solution is entrained in water vapor (gas-phase flow) and reaches the condenser (scatters and mixes). And
If the absorbing solution mixes into the condenser for the refrigerant or reaches the evaporator, it adversely affects the performance of the absorption chiller-heater.

Particularly, in an absorption chiller-heater equipped with an intermediate regenerator, the refrigerant solution after sensible heat / latent heat exchange in the intermediate regenerator flows into the low temperature regenerator as a gas-liquid two-phase flow.
The degree of scattering and mixing is high, and the effect of this is large.

[0006] Such a problem is not recognized in the conventional absorption chiller-heater, and therefore there is no solution to it.

The present invention has been proposed in view of the above problems of the prior art, and in an absorption chiller-heater equipped with an intermediate regenerator, the mistized solution is entrained in steam and reaches the condenser. It is an object of the present invention to provide an absorption chiller / heater capable of preventing the generation of scattered mixture.

[0008]

In the absorption chiller-heater of the present invention, a dilute solution line connecting a high temperature solution heat exchanger and a low temperature solution heat exchanger is connected to a high temperature regenerator line and a low temperature regenerator line. In the absorption chiller-heater of the type provided with a branch of, a line directed to the low temperature regenerator flows through a pressure adjusting means, a fluid supplied from an external heat source and a line directed to the low temperature regenerator. An intermediate regenerator that exchanges sensible heat / latent heat with the dilute solution is installed, and a mist is formed near the point where the line in which the intermediate regenerator is installed is connected to the low temperature regenerator. Mist entrainment prevention means for preventing the entrained solution from being entrained in water vapor is provided.

Further, the absorption chiller-heater of the present invention is an absorption chiller-heater of a type in which all the dilute solution discharged from the regenerator is sent to the high-temperature heat exchanger. A pressure adjusting means and an intermediate regenerator are provided between the high temperature solution heat exchanger and the low temperature regenerator of the solution line, and the intermediate regenerator is a fluid supplied from an external heat source and the intermediate concentration solution line. Sensible / latent heat exchange is performed with the fluid to prevent the mist solution from being entrained in water vapor near the location where the line in which the intermediate regenerator is inserted is connected to the low temperature regenerator. Mist entrainment prevention means is provided.

In the absorption chiller-heater of the present invention, the dilute solution line from the absorber to the low temperature regenerator via the low temperature solution heat exchanger and the high temperature via the solution pump and the high temperature solution heat exchanger from the low temperature regenerator. In an absorption chiller-heater of a type having an intermediate concentration solution line toward a regenerator, a pressure adjusting means and an intermediate regenerator are provided between the low temperature solution heat exchanger and the low temperature regenerator of the dilute solution line, and the intermediate The regenerator performs sensible heat / latent heat exchange between the fluid supplied from the external heat source and the fluid in the intermediate concentration solution line, and the line in which the intermediate regenerator is interposed is connected to the low temperature regenerator. Near the point where
Mist entrainment prevention means for preventing the mist-ized solution from being entrained in water vapor is provided.

By providing such a mist entrainment preventing means, the dilute solution, which has undergone sensible heat / latent heat exchange in the intermediate regenerator and becomes a gas-liquid two-phase flow (multiphase flow), flows into the low-temperature regenerator. However, the mist-ized solution is not caught in the water vapor (gas phase flow), and therefore the absorbing solution does not reach the condenser (scatter and mix) and adversely affect the performance of the absorption chiller-heater.

Here, a gas-liquid separation device can be adopted as the mist entrainment preventing means. By separating the vaporized refrigerant and the liquid phase absorption solution by the gas-liquid separator, it is possible to prevent the misted absorption solution from being caught in the refrigerant vapor.

As the mist entrainment preventing means,
It is also possible to construct a mechanism for branching the gas-liquid two-phase flow from the intermediate regenerator into a plurality of flows. If the gas-liquid two-phase flow is branched into multiple flows, the momentum retained when each branched gas-liquid two-phase flow flows into the low temperature regenerator is reduced and the mist formation is weakened. Are less likely to be entrained in the flow of refrigerant vapor.

Further, the mist entrainment preventing means can be constituted by a baffle plate. By providing the baffle plate, the momentum of the gas-liquid two-phase flow is reduced, and mist formation is less likely to occur.

The phrase "around the point where the line in which the intermediate regenerator is interposed is connected to the low temperature regenerator" means that the line is connected to the low temperature regenerator, and the intermediate regeneration is performed slightly from the connection point. It is used for the purpose of including all the region on the device side (upstream side) and the region (downstream side) that has entered the low temperature regenerator from the connection point.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an absorption chiller-heater of a type called "parallel flow" (a concept including a modification of a type called a series flow) which is a first embodiment of the present invention. ing. In FIG. 1, the absorption chiller / heater includes an evaporator 9, an absorber 10, a high temperature regenerator 11, a low temperature regenerator 12, a condenser 13, a high temperature solution heat exchanger 14, a low temperature solution heat exchanger 15, and a refrigerant pump P9. , Solution pump P10
And various lines connecting these members, a cold water line 6 for supplying cold water to a cooling load (not shown), and a fuel line 7 for supplying high quality fuel to a heating source (for example, a gas burner) to the high temperature regenerator 11. A high quality fuel system consisting of Further, an exhaust heat utilization system is further provided.

That is, a branch point 16 is provided between the high temperature solution heat exchanger 14 and the low temperature solution heat exchanger 15 in the dilute solution line L1.
Is provided, and a branch line L3 is branched from the branch point 16 toward the low temperature regenerator 12. In the branch line L3, from the branch point 16 side, a pressure reducing valve 17 which is pressure adjusting means,
The intermediate regenerator 18 is interposed. A waste heat line L2 is connected to the intermediate regenerator 18, and sensible heat is generated between the warm waste water in the waste heat line L2 and the dilute solution in the branch line L3.
It is configured to perform latent heat exchange. Mist entrainment prevention means A is provided at the connection between the branch line L3 and the low temperature regenerator 12.

FIG. 2 shows a so-called "series flow type" absorption chiller-heater which is a second embodiment of the present invention. In FIG. 2, a pressure adjusting means is provided between the high temperature solution heat exchanger 14 and the low temperature regenerator 12 in the intermediate concentration solution line L4 from the high temperature regenerator 11 to the low temperature regenerator 12 via the high temperature solution heat exchanger 14. The pressure reducing valve 17 and the intermediate regenerator 18 are interposed, and the control unit 3
The configuration is the same as that of FIG. 1 except 0A. And, at the connecting portion between the intermediate concentration solution line L4 and the low temperature regenerator 12,
Mist entrainment prevention means A is provided.

FIG. 3 shows a so-called "reverse flow type" absorption cold / hot water machine according to a third embodiment of the present invention. In FIG. 3, the dilute solution line L from the absorber 10 to the low temperature regenerator 12 via the low temperature solution heat exchanger 15 is shown.
1A, an intermediate concentration solution line L3A from the low temperature regenerator 12 to the high temperature regenerator 11 via the solution pump P12 and the high temperature solution heat exchanger 14, and a high temperature solution heat exchanger 14 and the low temperature solution heat exchange from the high temperature regenerator 11. Absorber 15 via the container 15
And a high-concentration solution line L5 facing the low-temperature solution heat exchanger 15 and the low-temperature regenerator 12 in the dilute solution line L1A. And the control unit 30B
Except for this, the configuration is similar to that of FIG. A mist entrainment prevention unit A is provided at the connection between the dilute solution line L1A and the low temperature regenerator 12.

Next, details of the mist entrainment prevention means A will be described.

The branch line L3, the intermediate concentration solution line L4, and the dilute solution line L in which the intermediate regenerator 18 is provided.
1A is collectively referred to as an intermediate regenerator line L.

In FIG. 4, a mist entrainment prevention means A
1 is a gas-liquid separation device 20 provided in the low temperature regenerator 12.
It is composed of This device 20 is provided with a plurality of (four in the illustrated example) slits 22 and a reversing plate 23 on the upper surface of one surface of a box body 21 which is vertically long and has a downward opening, and an intermediate regenerator line L faces the slit 22. It is inserted into the box body 21 from the side, and a downward bent portion 24 is formed at the tube end.
According to this means A1, the gas-liquid separation device 20 separates the gas-liquid two-phase flow in the intermediate regenerator line L into a gas phase and a liquid phase, the liquid phase flows down, and air is discharged from the slit 22. Mist will not scatter. Therefore, inclusion of mist due to water vapor in the low temperature regenerator 12 is prevented.

In FIG. 5, a mist entrainment prevention means A
2 is composed of a plurality of (four in the illustrated example) branch pipes 25a to 25d that connect the intermediate regenerator line L and the low temperature regenerator 12. According to this means A2, the gas-liquid two-phase flow is finely flowed down in the branch pipes 25a to 25d, and as a result, the momentum held by each branch flow becomes small, so that the scattering of mist is reduced and the flow of water vapor is reduced. Entrapment is prevented.

In FIG. 6, a mist entrainment prevention means A
3 is an intermediate regenerator line L protruding into the low temperature regenerator 12.
It is composed of a baffle plate 27 that covers the upper bent portion 26, that is, a cylindrical baffle 27 that is open at the bottom. In this means A3, the momentum possessed by the gas-liquid two-phase flow decreases due to the collision with the top surface of the baffle cylinder 27, the mist becomes less likely to scatter, and the mist is prevented from being caught.

7 to 14 show modified examples of the embodiment shown in FIG. 6 and have the same effects as those of FIG.

Mist entrainment prevention means A3A shown in FIG.
Then, the baffle cylinder 27A is provided with a plurality of downward slits 28 and is otherwise configured similarly to FIG.

Mist entrainment prevention means A3B shown in FIG.
Then, a plurality of through holes 29 are provided in the baffle cylinder 27B, and the other parts are configured similarly to FIG.

Mist entrainment prevention means A3C shown in FIG.
Then, the mesh filler 30 is filled inside the baffle cylinder 27B in FIG.

The mist entrainment prevention means A3D shown in FIGS. 10 and 11 is constituted by a baffle cylinder 27D provided on the peripheral wall 12a of the low temperature regenerator 12, and the tube end of the intermediate regenerator line L is placed in the baffle cylinder 27D. It is projected.

Mist entrainment prevention means A3 shown in FIG.
E is composed of a baffle rectangular tube 31 having a lower opening, and the upper bent portion 26 of the line L is inserted therein.

Mist entrainment prevention means A3 shown in FIG.
At F, the pipe end of the line L is projected into the baffle rectangular tube 31.

Mist entrainment prevention means A3 shown in FIG.
In G, the mesh filling 30 is filled in the baffle prism 31 in FIG.

[0034]

Since the present invention is configured as described above, in the absorption chiller-heater of the type in which the above-mentioned intermediate regenerator is interposed, the misted absorption solution flows as steam (refrigerant vapor). Can be prevented from reaching the condenser.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a perspective view showing an example of mist entrainment prevention means.

FIG. 5 is a side view showing another example of the mist entrainment prevention means.

FIG. 6 is a perspective view showing another example of the mist entrainment prevention means.

FIG. 7 is a perspective view showing another embodiment of FIG.

FIG. 8 is a perspective view showing another embodiment of FIG.

9 is a perspective view showing another embodiment of FIG.

FIG. 10 is a side sectional view showing another embodiment of FIG.

FIG. 11 is a front view of FIG. 10;

FIG. 12 is a perspective view showing another embodiment of FIG.

13 is a perspective view showing another embodiment of FIG.

FIG. 14 is a perspective view showing another embodiment of FIG.

[Explanation of symbols]

A, A1 to A3, A3A to A3G ... Mist entrainment prevention means L ... Intermediate regenerator line L1, L1A ... Dilute solution line L2 ... Exhaust heat line L3 ... Branch line L4, L4A. ..Intermediate concentration solution line L5 ... High concentration solution line P9 ... Refrigerant pump P10, P12 ... Solution pump 6 ... Cold water line 7 ... Fuel line 9 ... Evaporator 10 ... Absorber 11 ... High temperature regenerator 12 ... Low temperature regenerator 13 ... Condenser 14 ... High temperature solution heat exchanger 15 ... Low temperature solution heat exchanger 16 ... Branch point 17 ... Pressure reducing valve 18 ... Intermediate regenerator 20 ... Gas-liquid separating device 21 ... Box 22 ... Slit 23 ... Inverting plate 24 ... Lower bent portion 25a-25d ... Branch pipe 26 ... Upward bent portions 27, 27A- 27D ... Baffle tube 28 ... Slit 29 ... Through hole 30 ... Reticulated filling 31 ... Baffle square tube

Claims (6)

[Claims] 1. Absorption cold / hot water of a type in which a dilute solution line connecting a high temperature solution heat exchanger and a low temperature solution heat exchanger is provided with a branch line to a high temperature regenerator and a line to a low temperature regenerator. In the machine, sensible heat / latent heat exchange is performed in the line toward the low temperature regenerator between the pressure adjusting means and the fluid supplied from the external heat source and the dilute solution flowing in the line toward the low temperature regenerator. The intermediate regenerator, and the line in which the intermediate regenerator is interposed are connected to the low temperature regenerator in the vicinity of the place where the mist solution is prevented from being entrained in water vapor. An absorption chiller-heater equipped with a prevention means. 2. A high-temperature solution heat exchanger in an intermediate-concentration solution line that connects a high-temperature regenerator and a low-temperature regenerator in an absorption chiller-heater of a type in which all the dilute solution discharged from the regenerator is sent to the high-temperature heat exchanger A pressure adjusting means and an intermediate regenerator are interposed between the low temperature regenerator and the low temperature regenerator, and the intermediate regenerator generates sensible heat between the fluid supplied from the external heat source and the fluid in the intermediate concentration solution line.・ Mist entrainment prevention means for preventing the entrained solution from being entrained in water vapor is provided near the location where the line in which the intermediate regenerator is inserted is connected to the low temperature regenerator by performing latent heat exchange. An absorption chiller / heater characterized by being installed. 3. A dilute solution line from the absorber to the low temperature regenerator via the low temperature solution heat exchanger and an intermediate concentration solution line from the low temperature regenerator to the high temperature regenerator via the solution pump and the high temperature solution heat exchanger. In the absorption chiller-heater of the type having, a pressure adjusting means and an intermediate regenerator are provided between the low temperature solution heat exchanger and the low temperature regenerator of the dilute solution line, and the intermediate regenerator is an external heat source. Sensible heat / latent heat exchange is performed between the fluid supplied from the above and the fluid in the intermediate concentration solution line, and a mist is provided near the point where the line in which the intermediate regenerator is inserted is connected to the low temperature regenerator. An absorption chiller-heater comprising: a mist entrainment prevention means for preventing the atomized solution from being entrained in water vapor. 4. The absorption chiller-heater according to claim 1, wherein the mist entrainment prevention means is a gas-liquid separator. 5. The absorption chiller-heater according to claim 1, wherein the mist entrainment prevention means constitutes a mechanism for branching the gas-liquid two-phase flow from the intermediate regenerator into a plurality of flows. 6. The absorption chiller-heater according to claim 1, wherein the mist entrainment prevention means is a baffle plate.