KR19990047287A - Regenerator of Absorption Heating System - Google Patents

Abstract

The present invention relates to a regenerator of an absorption type heating and cooling system, and an object thereof is particularly to maximize the effective energy of the combustion gas.

In order to achieve the above object, the present invention provides a boiler type burner in a combustion chamber and a regenerator structure of an absorption type heating and cooling system equipped with a fin tube heat exchanger, wherein the inside of the combustion chamber is free for preheating a steel solution introduced from a solution heat exchanger. Heating device is installed.

Description

Regenerator of Absorption Heating System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type air conditioning system using a burner of a boiler type and a heat exchanger as a regenerator, and more particularly, to a regenerator of an absorption type air conditioning system for obtaining a large amount of effective energy.

The general absorption type heating and cooling system is classified into ammonia absorption type and LiBr absorption type. The difference is that the working fluid is aqueous ammonia solution in case of ammonia absorption type, and the working fluid is aqueous LiBr solution in case of LiBr absorption type. Ammonia is used, and LiBr absorption is water.

In the case of ammonia absorption in the regenerator, a low concentration of a chemical solution is made of ammonia and an absorption medium as the refrigerant, and in the case of LiBr absorption, a concentrated solution of high concentration is separated into water and an absorption medium as the refrigerant.

In addition, the operating pressure range is different in that it is formed at high pressure in the case of ammonia absorption and at low pressure in the case of LiBr absorption.

The following description will be based on the ammonia absorption formula, and in the case of LiBr absorption, each fluid may be considered to match the case of ammonia absorption.

As shown in FIG. 1, the ammonia absorption type air-conditioning system in the case of using a boiler type burner and a heat exchanger as a regenerator includes a burner 1 for generating heat and a refrigerant from the steel solution by applying heat generated from the burner 1. A regenerator 2 for generating steam and a medicinal solution, a rectifier 3 for condensing water evaporated together with the refrigerant vapor generated in the regenerator 2 and rectifying it with a high concentration of refrigerant vapor, and from the rectifier 3 A condenser 4 for cooling the delivered high concentration refrigerant vapor and condensing it into a liquid refrigerant, a refrigerant heat exchanger 5 for further subcooling the liquid refrigerant condensed from the condenser 4, and the refrigerant heat exchanger 5 Evaporator 6 which boils the liquid refrigerant further subcooled with the refrigerant in the two-phase state (liquid + gaseous phase) and the refrigerant in the two-phase state evaporated from the evaporator 6 passes through the refrigerant heat exchanger 5. In the condenser (5) After the heat exchange with the relatively high temperature liquid refrigerant flowing to the erection (6), it is further boiled into a refrigerant vapor state, the absorber (7) into which the refrigerant vapor generated from the refrigerant vapor and the regenerator (2) flows, and the absorber Absorption occurs due to the contact between the refrigerant vapor introduced into (7) and the medicinal solution to generate a strong solution of the original regenerator (2), and a solution pump (8) for pumping the strong solution into the rectifier (3). And a solution heat exchanger 9 in which the medicinal solution generated in the regenerator 2 and the strong solution generated in the absorber 7 exchange heat.

In addition, a restrictor 10 is disposed between the refrigerant heat exchanger 5 and the evaporator 6 and between the absorber 7 and the solution heat exchanger 9 to compensate the pressure difference between the high pressure portion and the low pressure portion. The indoor unit 11 and the outdoor unit coil (cooling on the drawing) in which the cooling water or the heating water is cooled or cooled by exchanging heat with the refrigerant from the condenser 4, the evaporator 6, and the absorber 7. H) is provided.

In addition, the regenerator 2 has a fin-tube heat exchanger shape consisting of a tube 2a through which a strong solution flows and a fin 2b vertically installed in contact with the outer diameter of the tube 2a, as shown in FIG. On the discharge side of the tube 2a, a gas-liquid separator 12 for separating the two-phase refrigerant generated from the regenerator 2 into a refrigerant vapor and a medicinal solution is connected, and the vapor tube 12a of the gas-liquid separator 12 and The liquid pipe 12b is connected to the solution heat exchanger 9.

In the drawings, reference numeral 13 is a combustion chamber, 14 is a combustion gas exhauster, and 15 is a combustion gas exhaust pipe.

In the conventional ammonia absorption type air-conditioning system configured as described above, first, when a strong solution flows into the regenerator 2, the strong solution flows through the tube 2a and is heated by the burner 1, which is a combustion part, to produce a two-phase refrigerant (refrigerant vapor + weak). Solution) and flows into the gas-liquid separator 12 connected to the discharge side of the tube 2a to separate the refrigerant vapor and the chemical solution.

Among them, the refrigerant vapor is introduced into the solution heat exchanger (9) through the vapor tube (12a) of the gas-liquid separator 12, and through the liquid tube (12b) of the gas-liquid separator (12).

The solution heat exchanger 9 has a shape in which a coil 9b for heat exchange is inserted into the cylinder 9a. The liquid pipe 12b of the gas-liquid separator 12 is connected to the coil 9b, and the steam pipe 12a. Is connected to the cylinder 9a.

As such, the medicinal solution separated from the gas-liquid separator 12 flows into and flows into the coil 9b of the solution heat exchanger 9, and the refrigerant vapor rises in contact with the outside of the coil 9b.

At this time, when the strong solution (from the rectifier) is supplied to the upper portion of the solution heat exchanger (9), the surface of the coil (9b) is soaked and flows in a thin film form, and the chemical solution is heated to the highest temperature in the system. To generate the refrigerant vapor, and the refrigerant vapor flowing from the gas-liquid separator 12 and rising inside the cylinder 9a is introduced into the rectifier 3 in a state where the purity thereof is increased.

The refrigerant vapor introduced into the rectifier 3 exchanges heat with the strong solution flowing into the rectifier 3 through the pumping of the solution pump 8 from the absorber 7 and then evaporated together in the regenerator 2. By condensation, it is rectified to a high concentration of refrigerant vapor.

On the other hand, the drug solution separated in the gas-liquid separator 12 is introduced into the absorber (7).

The high concentration refrigerant vapor rectified by the rectifier (3) flows into the condenser (4) and heat exchanges with the low temperature cooling water flowing in the flow path isolated from the condenser (4) to condense in the liquid refrigerant state, the liquid refrigerant is refrigerant heat exchange By passing through the gas (5) and heat exchange with the relatively low temperature refrigerant vapor generated in the evaporator (6) becomes a liquid refrigerant in a more subcooled state is introduced into the evaporator (6).

The liquid refrigerant introduced into the evaporator (6) heats up with the relatively high temperature cold water flowing around the evaporator (6) and boils in two-phase refrigerant, and the two-phase refrigerant again passes through the refrigerant heat exchanger (5). Heat exchange with the high temperature liquid refrigerant and further boiling to enter the absorber (7).

The refrigerant vapor introduced into the absorber (7) is absorbed into the medicinal solution introduced from the gas-liquid separator (12) to form a strong solution, and the heat of absorption generated at this time is offset by the low temperature cooling water flowing around the absorber (7). do.

At this time, the steel solution generated in the absorber 7 flows into the rectifier 3 by pumping the solution pump 8 and then into the solution heat exchanger 9, and the steel solution flows into the coil 9b. After heat exchange with the flowing medicinal solution, the temperature is increased, and then flowed back into the regenerator 2 to repeat the above operation sequentially.

Here, the regenerator 2 and the condenser 4 form a high pressure part, and the evaporator 6 and the absorber 7 form a low pressure part due to the characteristics of the system, and the difference in pressure is obtained by using a plurality of restrictors 10. Will be solved.

As described above, the restrictor 10 causes a pressure difference by reducing the cross-sectional area of the flow path so that the pressure difference between both ends occurs.

This absorption cooling and heating cycle is a heat pump with cooling and heating functions. In the case of cooling, cooling water can be obtained from the latent heat of evaporation of the refrigerant in the evaporator 6, and in the case of heating, the latent heat and condenser of the condenser 4 Heating water can be obtained from the heat of absorption.

This is accomplished by continuously cycling in equilibrium while the system is operating.

However, in the conventional absorption type heating and cooling system, when the self regenerator combustion part is manufactured, the existing production part of the combustion part of the other products must be greatly modified. Therefore, due to the enormous cost, the same type of boiler type burner and heat exchanger are used. When using the combustion section, there is a limit in the size of the heat exchanger according to the existing production specifications, which makes it difficult to bring the refrigerant vapor and the medicinal solution to the desired state at the outlet of the regenerator.

In addition, there is a problem that can not make full use of the thermal energy of the high-temperature combustion gas in the regenerator combustion unit.

In view of this point, an object of the present invention is to make the most of the high-temperature combustion gas effective energy by forming a preheating part on the top of the combustion chamber of the regenerator.

1 is a cycle diagram of a typical absorption air-conditioning system.

2 is a regenerator of a conventional absorption air-conditioning system,

(A) Configuration diagram of the combustion section.

(B) is a detailed view of the heat exchanger.

3 is a regenerator of the absorption type heating and cooling system according to the present invention,

(A) Configuration diagram of the combustion section.

(B) is a perspective view of the heat exchanger.

(C) is a side view of the heat exchanger.

*** Explanation of symbols for the main parts of the drawing ***

101: combustion chamber 102: burner

103: fin tube heat exchanger 104: preheating unit

105: solution heat exchanger 106: strong solution distribution capillary

107: solution branch pipe 108: solution confluence pipe

109: refrigerant steam tank 110: refrigerant steam outlet

111: gas-liquid separator 112: combustion gas discharger

113: combustion gas exhaust pipe

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating a regenerator of an absorption type air conditioning system according to the present invention, wherein a burner 102 serving as a heating means in the combustion chamber 101 and a fin tube heat exchanger 103 are heated by combustion heat generated from the burner 102. And a preheating part 104 installed on the upper end of the fin tube heat exchanger 103.

The preheating unit 104 is largely divided into three parts, a steel solution distribution capillary 106 for collecting the steel solution flowing from the solution heat exchanger 105 and distributing it in a plurality of directions, and the steel solution distribution capillary 106. Finned tube heat exchanger (104) by collecting a plurality of solution branch pipe 107 is heated by the combustion gas rising from the lower portion while flowing in a plurality of directions from) It consists of a solution confluence pipe 108 to be transferred to.

At this time, the strong solution distribution capillary 106 is positioned higher than the solution confluence outlet 108 for the smooth flow of the strong solution, whereby a plurality of solution branch pipes 107 are inclined by about 15 ° so that the strong solution distribution capillary ( 106) and the solution confluence tube (108).

In addition, on one side of the strong solution distribution capillary 106, a refrigerant vapor tank 109 for collecting refrigerant vapors generated from a plurality of solution branch pipes 107, and a refrigerant heat collected in the refrigerant vapor tank 109 is a solution heat exchanger. A refrigerant vapor outlet pipe 110 connecting the solution heat exchanger 105 and the refrigerant steam tank 109 to be transferred to the 105 is provided.

Reference numeral 111 in the drawings is a gas-liquid separator, 112 is a combustion gas exhauster, 113 is a combustion gas exhaust pipe.

Referring to the operation of the present invention configured as described above is as follows.

First, the steel solution accumulated at the bottom of the solution heat exchanger 105 flows into the steel solution distribution capillary 106 of the preheating unit 104 installed at the upper end of the combustion chamber, and the steel solution collected therein is transferred to the plurality of solution branch tubes 107. It is distributed and flows, and performs most of the heat exchange with the hot combustion gas which has completed heat exchange with the fin tube heat exchanger 103 of the regenerator.

In this case, the refrigerant vapor tank 109 and the refrigerant steam outlet 110 are provided such that the refrigerant vapor generated in the solution branch pipe 107 does not interfere with the flow of the strong solution flowing from the solution heat exchanger 105.

That is, when the strong solution flowing through the solution branch pipe 107 is heated by the high temperature combustion gas rising from the lower portion, and the refrigerant vapor is generated, the refrigerant vapor is collected in the refrigerant vapor tank 109 and the refrigerant vapor outlet pipe 110 is opened. By allowing the refrigerant vapor introduced into the solution heat exchanger 105 to be combined, the flow of the strong solution flowing to the preheating unit 104 does not interfere with the refrigerant vapor generated at the preheating unit 104.

The steel solution flowing into the solution branch pipe 107 and saturating through the heat exchange with the hot combustion gas is collected again in the solution confluence pipe 108, and the steel solution is transferred to the fin tube heat exchanger 103. This process is repeated while the system is in equilibrium.

Since the following operation is the same as the conventional one, it will be omitted.

As described above, the present invention is commonly used when a boiler-type combustion unit and a heat exchanger are used for the regenerator of an absorption type heating and cooling system by installing a preheating unit capable of preheating the steel solution introduced into the regenerator in an empty space at the top of the combustion chamber. Therefore, when using the existing boiler burner type for the regenerator, it is possible to secure the heat exchange heat transfer area required in the regenerator of the system without increasing the size of the combustion section space. Can be utilized to increase the efficiency of the system.

Claims (9)

In the regenerator structure of the absorption type heating and cooling system equipped with a boiler type burner and a fin tube heat exchanger in a combustion chamber, Regenerator of the absorption heating and heating system, characterized in that the preheating device for preheating the steel solution flowing from the solution heat exchanger is installed inside the combustion chamber. The method of claim 1, The preheating device is a distribution unit for collecting the strong solution flowing from the solution heat exchanger in a plurality of directions, and A heating part heated by the combustion gas rising from the lower portion while the steel solution distributed in the plurality of directions from the distribution part flows; The regenerator of the absorption type heating and cooling system, characterized in that consisting of a transfer unit for conveying the steel solution from the heating unit to the fin tube heat exchanger again. The method of claim 1, The preheating device is a regenerator of the absorption type heating and cooling system, characterized in that formed on top of the combustion chamber to use the waste heat of the combustion gas. The method of claim 2, The distributor is tubular, one end in communication with the solution heat exchanger, the other end is closed, the regenerator of the absorption air-conditioning system, characterized in that in communication with the heating portion along the side. The method of claim 2, And the heating part is inclined about 15 ° between the distribution part and the conveying part. The method of claim 5, And the distribution unit is configured to be higher than the conveying unit for smooth flow of the strong solution. The method of claim 2, And said conveying portion is tubular in shape, in communication with the heating portion along a side thereof, and in communication with one end of the tube of the fin tube heat exchanger, the other end of which is closed. The method according to claim 1 or 2, One side of the distribution unit is a regenerator of the absorption type heating and cooling system, characterized in that the refrigerant vapor tank for storing the refrigerant vapor generated from the heating unit is installed. The method of claim 7, wherein And a refrigerant vapor discharge pipe communicating with the refrigerant vapor tank and the solution heat exchanger to discharge the refrigerant vapor to the solution heat exchanger.