KR980008272A - Condenser of ammonia absorption cycle - Google Patents

Abstract

A condenser of an ammonia absorption type cycle in which refrigerant vapor introduced from a regenerator is heat-exchanged with a cooling medium to discharge it as liquid refrigerant to an evaporator, the condenser having a plate type case in which a cooling medium flows in and out, And a plate-like refrigerant heat transfer plate into which refrigerant gas flows and which is heat-exchanged with the cooling medium to flow out.

Description

Condenser of ammonia absorption cycle

Figure 1 shows the cycle diagram of an ammonia absorption system.

FIG. 2 is a schematic view of a conventional condenser of an ammonia absorption cycle

FIG. 3 is a schematic view of the condenser of the ammonia absorption cycle according to the present invention. FIG.

FIG. 4 is a schematic view of a condenser of an ammonia absorption cycle according to the present invention in a case-removed state; FIG.

FIG. 5 is a plan view, a front view, and a side view of the inner insertion plate according to the present invention. FIG.

6 is a plan view, a front view, and a side view of an external insertion plate according to the present invention;

Description of Reference Numerals in Major Parts of the Drawings

1: regenerator 3: rectifier

6: Evaporator 9: Absorber

40, 50: condenser 51: case

52: heat transfer plate 53: cooling water side

54: Refrigerant vapor header 55: Liquid refrigerant header

56: Inner insertion plate 57: Outer insertion plate

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ammonia absorption type cycle, and more particularly to a condenser of an ammonia absorption type cycle which has good workability and can be downsized.

1 shows an ammonia absorption system comprising a regenerator 1, an analyzer 2, a rectifier 3, a condenser 4, an evaporator 6, an absorber 9, a hydronically-cooled absorber, (7), a solution-cooled absorber (8), and a solution pump (10).

In the operation of this system, first, the concentration of ammonia is changed into a strong steel solution by continuous absorption action in the absorber 9, and this steel solution is sent to the regenerator 1 by the solution pump 10. This steel solution is heated by the burner 11 which is a combustion part of the regenerator 1 and is converted into a weak solution by evaporation of the ammonia refrigerant and flows into the upper part of the absorber 9 of the low pressure part through the restrictor 13 on the solution flow path 12 ≪ / RTI > On the other hand, the vaporized ammonia refrigerant vapor flows through the analyzer 2 and the rectifier 3 to become the ammonia vapor having a higher purity and a lower temperature and enters the condenser 4 via the refrigerant vapor passage 15 to enter the cooling water inlet 20, The refrigerant is cooled by the intermediate medium such as cooling water or the like introduced into the liquid refrigerant flow path 16 through the cooling water outlet 21 and the liquid refrigerant flows into the liquid refrigerant flow path 16, The ammonia liquid refrigerant flows through the external conduit of the precooler 5 and mutual heat exchange is performed between the low temperature steam refrigerant (heavy gasifier 6) flowing through the inner tube to increase the efficiency by supercooling the liquid refrigerant and overheating the vapor refrigerant . The supercooled liquid refrigerant that has passed through the precooler 5 is pressure-reduced in the restrictor 17 and flows into the evaporator 6. At this time, the cold water flows from the upper part of the evaporator and evaporates the refrigerant. The vapor refrigerant evaporated in the evaporator 6 enters the interior of the precooler 5 to subcool the liquid refrigerant flowing in the outer tube and then flows into the absorber and is absorbed by the solution coming from the upper part to form a slight low pressure, . The high-temperature weak solution flowing out of the regenerator 1 flows into the spray plate on the upper part of the absorber 9 and then falls and falls on the surface of the heat-exchange coil of the solution-cooling absorber 8 through which the low- Accelerates the absorption rate and increases the efficiency. Further, the absorption continues in the solution-cooling absorber 7 to become a strong solution. At this time, the cooling water 18 exchanges heat with the solution that falls and falls on the surface of the heat-exchanging coil of the solution-cooling absorber 7, and the temperature rises, which causes heat exchange with the outside air in the fan coil unit (not shown). The steel solution flows into the rectifier 3 through the steel solution flow path 14 by the solution pump 10 at a relatively low temperature while exchanging heat with the hot steam refrigerant and again into the heat exchange coil side of the solution cooling absorber 8 Exchanges heat with the high temperature drug solution, and is supplied to the upper part of the analyzer 2 after the temperature is raised. The preheating effect of the temperature rise of the steel solution serves to increase the efficiency of the system. The river solution introduced into the regenerator 1 repeats the above-mentioned operations sequentially so that the operation is maintained.

2 shows a structure of an existing condenser. The condenser includes a shell 41, a heat transfer pipe 42 through which refrigerant flows, a micelle 43, a cooling water flow passage 44, a refrigerant vapor inlet 45, a liquid refrigerant outlet 46 ), A cooling water inlet (47), and a cooling water outlet (48). The refrigerant vapor having a high purity and a high temperature in the regenerator 1 flows through the refrigerant vapor inlet 45 and is heat-exchanged with the cooling water introduced through the cooling water inlet 47 to be cooled.

Such a conventional condenser is designed and manufactured symmetrically in consideration of the heat transfer effect by allowing the cooling medium to flow between the micelle and the inner surface of the shell by inserting the micelle 43 considering the area of the space inside the shell excluding the heat transfer tube . However, it is difficult to make the gap between the heat transfer tube 42 and the shell 41 and the gap between the heat transfer tube and the michelle accurately, and the micelles are necessary because the condenser is manufactured in the form of a shell. Also, the heat pipe is also limited by the minimum coil diameter to be compact due to the coil bending. Further, when the flow path of the cooling water is made more than two paths, it is difficult to make the intervals between the coils constant, and it is also difficult to set the gap even at the time of manufacture.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a condenser of an ammonia absorption type cycle in which the shape thereof is formed into a plate shape so that the workability is good and can be downsized.

In order to accomplish the above object, the present invention provides a condenser of an ammonia absorption type cycle in which a refrigerant vapor introduced from a regenerator is heat-exchanged with a cooling medium to discharge it as liquid refrigerant to an evaporator, And a plate-like refrigerant heat transfer plate provided inside the case, the refrigerant gas flowing from the regenerator flowing into the heat exchange plate, and being heat-exchanged with the cooling medium to flow out.

On the other hand, an external insertion plate having a continuous v-shaped internal insertion plate is provided so as to be in contact with the internal surface of the heat transfer plate, and the external heat transfer plate has a continuous fin spaced apart from the external heat transfer plate, .

Hereinafter, the condenser of the ammonia absorption cycle of the present invention will be described in detail with reference to the accompanying drawings.

3 shows a structure of a condenser of the ammonia absorption type cycle according to the present invention. The condenser 50 includes a plate-shaped case 51 having a cooling water inlet 58 and a cooling water outlet 59 formed therein to allow cooling water to flow in and out. A refrigerant side heat transfer plate 52 provided inside the case and formed with a refrigerant vapor inlet 52a and a liquid refrigerant outlet 52b for allowing a refrigerant gas from the regenerator to flow therethrough and to cause heat exchange with the cooling water to flow out, And a cooling-water-side flow path 53 flowing outside the heat transfer plate.

The refrigerant-side heat transfer plate 52 is provided so that a continuous v-shaped internal insertion plate (56 of the scheme) is brought into contact with the inner surface of the heat transfer plate for improving the heat transfer effect of condensation, An outer insertion plate 57 having an inner tube 57b is fitted to the outer surface of the heat transfer plate and a refrigerant vapor header 54 is formed thereon and a liquid refrigerant header 55 is formed thereunder.

The heat transfer plate 52, the inner insertion plate 56, and the outer insertion plate 57 are made of an iron-based material.

The inner insertion plate 56 is spot welded between the refrigerant vapor head 54 and the liquid refrigerant header 55 at a height not obstructing the refrigerant vapor and liquid refrigerant flow paths. Further, the outer insertion plate 57 is welded to the upper surface of the upper plate 57a and the branch plates 57b continuous to the upper plate with intervals therebetween to fit the outer surface of the refrigerant side heat transfer plate.

And the width of the plate is equal to the distance of the flow path on the side of the cooling water, so that the plates welded to the upper plate of the external insertion plate serve to divide the cooling water side flow path into various paths.

Hereinafter, the operation of the condenser of the present invention will be described.

The cooling water flows into the case 51 through the cooling water inlet 58 and enters the lower portion of the refrigerant side heat transfer plate 52. The refrigerant water is branched and moved upward by the branch plate of the external insertion plate from there, Flows into the refrigerant side heat transfer plate (52) through the steam inlet (52) and moves downward. The cooling water, which moves from the lower side to the upper side along the cooling water-side flow path outside the refrigerant side heat transfer plate 52, is heat-exchanged with the refrigerant vapor moving from the upper side to the lower side in the refrigerant side heat transfer plate, And the liquid refrigerant cooled by heat exchange flows out to the evaporator through the liquid refrigerant outlet 52b.

On the other hand, when the casing surrounding the cooling water-side flow path serves to support the refrigerant vapor flow path and the liquid refrigerant flow path by using a light material such as acryl or the like and is processed with a transparent material such as acrylic, It is possible to know when to clean easily.

As described above, according to the present invention, when the condenser is formed into a plate shape, a countercross flow method can be obtained, the heat exchange contact area can be easily increased compared with the conventional shell / tube method, In the shell / tube method, there is a limit in the size of the coil diameter that can be manufactured for the tube diameter when the coil is machined. However, if the plate is formed, it can be freely adjusted by controlling the width in the longitudinal direction. Therefore, it is possible to manufacture compactly with good processability.

Claims (4)

A condenser of an ammonia absorption type cycle in which refrigerant vapor introduced from a regenerator is heat-exchanged with a cooling medium to discharge it as liquid refrigerant to an evaporator, the condenser having a plate type case in which a cooling medium flows in and out, And a refrigerant heat transfer plate of a plate type in which a refrigerant gas flows in and exits the heat exchanger with the cooling medium, The heat exchanger according to claim 1, wherein an inner insertion plate of a continuous V shape is provided in the interior of the refrigerant heat transfer plate so as to be in contact with an inner surface of the heat transfer plate, and an outer insertion plate having a branch plate continuous with an interval outside the heat transfer plate Wherein the condenser is fitted to the condenser. The condenser according to claim 2, wherein the heat transfer plate, the inner insertion plate, and the outer insertion plate are made of iron, and the case is made of a transparent material. The condenser of claim 1 or 2, wherein the flow direction of the refrigerant medium and the flow direction of the refrigerant are opposite to each other. ※ Note: It is disclosed by the contents of the first application.