KR101914487B1 - Hybrid system of absorption type refrigeration and heat pupm for supplying cooling and steam simultaneously - Google Patents

Abstract

[0001] The present invention relates to an absorption type refrigeration / heat pump hybrid system for cooling and steam supply, which combines a single-effect absorption refrigerator system and a two-stage single-stage absorption heat pump system, comprising a condenser (CON) (CON) and regenerator (GEN) operating region (absorption liquid temperature, concentration, pressure) of the two-stage single-stage absorption heat pump system have similar operating ranges. A hybrid type absorption system in which a single-effect absorption-type refrigerator system and a two-stage single-stage absorption heat pump are combined.
It is intended to provide an absorption type hybrid system capable of supplying industrial processes with simultaneous simultaneous 7 ° C cold water and 120 ° C steam required in industrial processes with waste water of 80 ° to 90 ° C, which is abandoned in industrial processes .

Description

[0001] The present invention relates to an absorption type refrigeration / heat pump hybrid system,

[0001] The present invention relates to an absorption type refrigeration / heat pump hybrid system for cooling and steam supply, which combines a single-effect absorption refrigerator system and a two-stage single-stage absorption heat pump system, comprising a condenser (CON) (CON) and regenerator (GEN) operating region (absorption liquid temperature, concentration, pressure) of the two-stage single-stage absorption heat pump system have similar operating ranges. A hybrid type absorption system in which a single-effect absorption-type refrigerator system and a two-stage single-stage absorption heat pump are combined.

It is intended to provide an absorption type hybrid system capable of supplying industrial processes with simultaneous simultaneous 7 ° C cold water and 120 ° C steam required in industrial processes with waste water of 80 ° to 90 ° C, which is abandoned in industrial processes .

It is necessary to recover or recycle the energy heat source that is abandoned by the industry, and development of the utilization technology of the waste heat of the factory and the waste heat of the cogeneration is carried out in various directions, and the effective use of waste heat is recovering. For this purpose, waste heat, which is consumed by some industries such as hot water or steam, is actively recycled using an absorption type heat pump.

A general absorption heat pump uses a high pressure evaporation process of a refrigerant by heating an absorption liquid instead of a compression stroke in a compression heat pump. Generally, water is used as a refrigerant, and lithium bromide (LiBr: Lithium Bromide) is mainly used as an absorption liquid. The LiBr aqueous solution, which is absorbed by the refrigerant (water) vapor, is transported to the regenerator by the pump, where heat is applied (burner, waste heat, etc.) to evaporate the refrigerant (water) and the aqueous solution is concentrated again. This concentrated aqueous solution is then repeated to absorb the vapor again in the evaporator.

Absorption type heat pumps are characterized by the fact that unlike compression heat pumps which are driven by electric energy, heat is pumped by using heat of combustion, heat of hot water or steam of gas and it is mainly used for recovering heat of large capacity. It is possible to save 40% of the energy cost, and the temperature of the hot water to be supplied can be increased by 95 ° C hot water and 120 ° C, it can be widely used for heating, hot water supply, and industrial process.

As shown in FIG. 1A, a general single-effect absorption refrigerator includes five main heat exchangers: a generator, a condenser, an evaporator, an absorber, and a solution heat exchanger And operates on the following operating principle.

The vapor generated in the evaporator is absorbed in the LiBr aqueous solution in the absorber, and the LiBr aqueous solution becomes a high concentration solution (concentrated solution) in the low concentration solution (dilution solution). At this time, absorption heat is generated in the absorption process and the temperature of the solution is increased, so that the absorption power of the vapor is decreased. Therefore, for a continuous absorption process, the absorber needs continuous cooling by cooling water or zero air. Therefore, cooling water is required. Generally, the cooling water exits the cooling tower and undergoes the process of cooling the absorber and condenser at 25 ° C to 32 ° C and then going back to the cooling tower.

The high-concentration solution in the absorber flows through the solution pump to the regenerator after the temperature rises in the solution heat exchanger. In the regenerator, a low concentration solution is heated using a heat source of 80 ° C to 90 ° C to generate a refrigerant vapor using the difference between the boiling point of LiBr, which is an absorbent, and water, which is a refrigerant. The high-temperature and high-concentration LiBr aqueous solution is cooled in the solution heat exchanger and then returned to the absorber through the throttling valve (EV). The refrigerant vapor generated in the regenerator emits heat in the condenser to become a liquid, and then evaporates in the evaporator to produce a refrigerating effect.

As shown in FIG. 1B, the process of FIG. 1A is shown in the diagram of the dewing line, and the whole flow and the state of each part show a cycle showing the relationship between the temperature, the concentration, and the vapor pressure of the LiBr aqueous solution.

In Fig. 1B, 1-2-5-3 represents the path of water as a refrigerant, and 6-2-5-4 represents the path of aqueous solution of lithium bromide. The absorption liquid is circulated in the clockwise direction. The regenerator, condenser pressure, evaporator and absorber pressure are about 5 ~ 7mmHg and 45 ~ 60mmHg, respectively. The concentrations of the dilute solution and the concentrated solution are about 56 to 58% and about 60 to 62%, respectively.

The absorption heat pump of the first type is a first type absorption heat pump. As shown in FIG. 2, the first type absorption heat pump has a solution cycle in a clockwise direction on a dewing line showing the equilibrium temperature relationship between the refrigerant and the solution Respectively.

    The first type absorption heat pump, which has a higher temperature level than the absorption type refrigerator, has a waste heat temperature elevated by using a high temperature heat source, and is moving toward the high temperature side throughout the cycle of the absorption refrigerator.

For example, if the evaporator is supplied with waste water of about 35 ° C and the heat source is made of gas or steam at a temperature of about 75 ° C, it can heat 1.5 to 1.6 times as much heat as the fuel, Is used as an increase type absorption heat pump.

The lower part of FIG. 2 shows the temperature of the hot water obtained from the waste heat source in the system configuration diagram. As shown in the figure, in the absorption type heat pump system, a high temperature water of about 75 ° C can be obtained by using the waste heat source of about 38 ° C, and the efficiency of the whole system can be obtained as COP = 1.7, which is a very useful heat recovery system.

Heat recovery and coefficient of performance of Type 1 absorption heat pump

:증발기의 폐열 회수열량

: Heat recovery calorific value of evaporator

:흡수기에서 온수 가열에 쓰이는 열량

: The calorie used to heat the hot water in the absorber

:재생기에서 필요한 열량

: The amount of heat required in the regenerator

:응축기에서 온수 가열에 쓰이는 열량

: Calories used for hot water heating in a condenser

In the case of the first type absorption type heat pump, the drive heat source applied from outside is Q _G , and the heat used for hot water heating is Q _A and Q _C , and the coefficient of performance is as follows.

= 1.6 내지 1.7

= 1.6 to 1.7

Here, the coefficient of performance of the first type absorption heat pump is always larger than 1 and the coefficient of performance is Q _E / Q _G , that is, the calorific value of the low-temperature heat absorbed by the evaporator becomes large.

In general, Q _E accounts for 40% to 45% of the total heat, and using a heat pump can save about 40% to 45% of energy compared to using a conventional boiler.

2) The second type absorption type heat pump is a system for producing high-temperature energy and low-temperature energy by using the waste heat energy of the middle temperature as drive heat energy, and discharges low-temperature energy by using high-temperature energy.

   As shown in FIG. 3, when heat is supplied at an intermediate temperature, a part of the heat is converted to a high temperature and the remainder is converted to a low temperature. Thus, the two-kind absorption heat pump is very useful for recovering industrial waste heat to be. It is particularly advantageous for obtaining high temperature steam.

As for the operating principle and cycle, as shown in FIG. 4, the working principle is that the diluent solution in the regenerator is heated by the waste water of 80 to 90 degrees to generate the refrigerant vapor. The generated refrigerant vapor flows to the condenser and is condensed by the cooling water in the condenser. The condensed refrigerant liquid is sent to the evaporator by the refrigerant pump and the refrigerant evaporates by a part of the waste hot water in the evaporator.

When the concentrated solution supplied from the high-temperature regenerator absorbs the vapor generated in the evaporator in the absorber, heat of vapor absorption is generated. At this time, the hot water passing through the absorber heat pipe is heated to a high temperature and converted into high-grade usable heat. The absorption liquid which absorbs the refrigerant vapor in the absorber and becomes low concentration is supplied to the regenerator through the solution heat exchanger. The concentrated solution in the regenerator is sent to the absorber by the absorptive pump.

  When the waste water is used to generate the refrigerant in the regenerator, the temperature of the regenerator is lowered, and the remaining waste water is supplied to the evaporator to generate the refrigerant vapor, and the temperature is lowered . In the case of hot water passing through the absorber, the temperature is high and converted into high-grade heat, and the hot water is raised according to the purpose of the industrial field, and the hot water can be self-evaporated through the flash tank with a predetermined pressure steam to supply low pressure steam. By using a horizontal shell and a tubular absorber, the water in the vapor mixture in the tube is heated by the absorption heat of the extracellular solution to generate steam directly in the absorber tube. In order to increase the amount of generated steam, the steam is separated from the gas-liquid separator after having a certain amount of moisture, and the liquid is recycled

 5, the overall flow and the state of each part show a cycle showing the relationship between the temperature, the concentration, and the vapor pressure of the LiBr aqueous solution. The absorption liquid is circulated counterclockwise. The regenerator, condenser pressure, evaporator and absorber pressure are about 45 ~ 60mmHg and 350 ~ 400mmHg respectively. Concentrations of dilute and concentrated solutions are 56 ~ 58% and 60 ~ 62%, respectively.

  The second type heat pump supplies hot water waste heat of 80 ° C to 90 ° C to the regenerator and the evaporator and the condenser is supplied with cooling water of 25 ° C to 32 ° C in the cooling tower to generate steam of 120 at the absorber and 0.2 MPa .

As the heat output and the coefficient of performance of the second type absorption heat pump, the overall heat recovery of the second type absorption heat pump is made between the heat amount Q _E + Q _G entering the heat pump and the heat amount Q _A + Q _C exiting the heat pump.

:증발기의 폐온수 회수 열량(구동열원)

: Waste heat recovery heat of the evaporator (driving heat source)

:흡수기에서 온수 가열에 쓰이는 열량

: The calorie used to heat the hot water in the absorber

:재생기에 필요한 폐온수 회수열량(구동열원)

: Waste heat recovery heat required for regenerator (driving heat source)

:응축기에서 냉각수에 의해 방열되는 열량

: Heat released by the cooling water in the condenser

이고, 온수가열에 이용하는 열은

이다.

는 냉각수에 의해 방열되는 열량으로, 이때 성적계수는 다음과 같다.In the case of the second type absorption type heat pump,

And the heat used for hot water heating is

to be.

Is the heat quantity radiated by the cooling water, and the coefficient of performance is as follows.

Korean Patent Publication No. 10-0337208 Korean Patent Publication No. 10-1052776

The present invention has been made to solve the above problems, and it is an object of the present invention to provide an absorption type refrigeration / heat pump hybrid system for simultaneous supply of cooling and steam, which combines a single-effect absorption refrigerator system and a two- (CON), regenerator (GEN) and condenser (CON) and regenerator (GEN) operating area (absorption liquid temperature, concentration and pressure) of the two-stage single stage absorption heat pump system have similar operating ranges A hybrid type absorption system in which a condenser (CON) and a regenerator (GEN) are commonly used and a one-stage absorption type refrigerator system and a two-kind single stage absorption type heat pump are combined.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, the objects and advantages of the present invention can be realized by the means and the combination shown in the claims.

As a means for solving the above problems, the present invention is characterized in that steam generated in a low-temperature evaporator containing a refrigerant is absorbed into a LiBr aqueous solution in a low-temperature absorber and is converted from a high-concentration solution to a low- concentration solution; The low concentration solution in the low temperature absorber is supplied to the regenerator through the low temperature solution heat exchanger by the solution pump 3; A portion of the concentrated solution of the regenerator passes through the low temperature solution heat exchanger and then through the first throttling valve to the low temperature absorber and the remaining concentrated solution flows into the high temperature absorber through the high temperature solution heat exchanger by the solution pump 2; The solution in the high-temperature absorber flows into the regenerator again via the hot solution heat exchanger; The refrigerant vapor generated in the regenerator discharges heat from the condenser to become liquid refrigerant, flows into the low temperature evaporator through the expansion valve, and the remaining refrigerant is introduced into the high temperature evaporator by the refrigerant pump 1; The vapor generated in the high-temperature evaporator is absorbed in the LiBr aqueous solution in the high-temperature absorber so as to be converted from the high-concentration solution to the low-concentration solution; And to provide a combined cooling and steam simultaneous absorption refrigeration / heat pump hybrid system.

As described above, the present invention can be applied to the industrial process by simultaneously supplying the 7 ° C cold water and the 120 ° C steam, which are necessary in the industrial process, to the waste water of 80 ° to 90 ° C, Absorption type hybrid system.

It is also an object of the present invention to provide an efficient system for selectively using a refrigerator system or a heat pump system separately or by connecting the two systems to a hybrid system at the same time, will be.

FIG. 1A is a schematic diagram showing a general single-effect absorption refrigerator system. FIG.
1B is a schematic diagram showing the dewing cycle diagram of a single-effect absorption refrigerator system;
2 is a schematic view showing a general type 1 heat pump energy balance and a dewing cycle diagram.
3 is a schematic view showing energy balance of a second type heat pump.
4 is a schematic diagram illustrating a typical two-stage single stage absorption heat pump system.
5 is a schematic diagram showing a two-stage single stage absorption pump system dewing cycle diagram;
6 is a schematic view showing Embodiment 1 of a cooling and steam supply absorption refrigeration and heat pump hybrid system of the present invention.
7 is a schematic diagram illustrating the cooling and steam-fed absorption refrigeration and heat pump hybrid system dewing cycle diagram of the present invention.
8 is a schematic view showing Embodiment 2 of a cooling and steam supply absorption type refrigeration and heat pump hybrid system of the present invention.
9 is a schematic view showing Embodiment 3 of a cooling and steam supply absorption refrigeration and heat pump hybrid system of the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as " left, " " right, " " lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first " and " second " are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

The absorption type refrigeration / heat pump hybrid system according to the present invention will now be described.

The vapor generated in the low temperature evaporator 100 containing the refrigerant is absorbed into the LiBr aqueous solution in the low temperature absorber 110 and is converted from the high concentration solution to the low concentration solution;

The low concentration solution in the low temperature absorber 110 is supplied to the regenerator 130 through the low temperature solution heat exchanger 120 by the solution pump 3 115;

A portion of the concentrated solution of the regenerator 130 flows into the low temperature absorber 110 through the first throttling valve 131a and the remaining concentrated solution flows into the solution pump 2 135, Is introduced into the hot absorber (150) through the hot solution heat exchanger (140);

The solution in the high temperature absorber 150 flows through the hot solution heat exchanger 140, the second throttling valve 131b, and the regenerator 130 again;

The refrigerant vapor generated in the regenerator 130 is discharged into the liquid refrigerant by the condenser 160 and flows into the low temperature evaporator 100 through the expansion valve 162. The remaining refrigerant flows into the refrigerant pump 165 ) Into the high-temperature evaporator (170);

The vapor generated in the high-temperature evaporator 170 is absorbed in the LiBr aqueous solution in the high-temperature absorber 150 to be converted from the high-concentration solution to the low-concentration solution; And more particularly, to a combined cooling and steam simultaneous absorption refrigeration / heat pump hybrid system.

A refrigerant storage tank 180 is formed below the low-temperature evaporator 100 and the high-temperature evaporator 17 to circulate the refrigerant to the circulation pumps 4 and 5 (175, 105), thereby supplying refrigerant to the heat- Thereby promoting the heat transfer of the evaporator.

In addition, a capacity control valve 133 is added to the lower part of the regenerator 130 to adjust the supply amount of the absorbing liquid flowing into the low temperature absorber 110,

A refrigerant regulating valve 161 is provided under the condenser 160 to regulate a flow rate of the refrigerant flowing into the low temperature evaporator 100.

A refrigerant heat exchanger 190 is added between the high temperature evaporator 170 and the condenser 160 to exchange heat with the refrigerant flowing from the condenser 160 to the high temperature evaporator 170, So that the amount of evaporation can be increased.

Further, cooling water or air of a low-temperature heat source flows into the low-temperature absorber 110 and the condenser 160 in series, or flows in parallel to the respective structures,

The regenerator 130 and the high-temperature evaporator 170 are so designed that the cooling water or air of the high-temperature heat source flows in series or in parallel in each configuration; .

Further, the performance of the hybrid system is changed by the operating capacity of the refrigerant pump 1 165 and the solution pump 2 135, and the supply amount of the absorption liquid is controlled proportionally according to the amount of cooling heat or steam required in the customer, To enable capacity control of the battery; .

The component including the low temperature evaporator 100, the low temperature absorber 110, the regenerator 130, and the condenser 160 is a single effect absorption refrigerator system,

A component comprising the high temperature evaporator 170, the hot absorber 150, the regenerator 130, and the condenser 160 is a two stage single stage absorption heat pump system,

Since the operation range of the condenser 160 and the regenerator 130 is the same as that of the single-stage absorption-type refrigerant system and the dual-stage single-stage absorption heat pump system, , A regenerator (130), and a two-stage single-stage absorption heat pump;

The present invention relates to a combined cooling and / or steam supply absorption refrigeration / heat pump hybrid system in which the refrigerator system or the heat pump system is selected and used separately, or the two systems are connected to each other to be used as a hybrid type absorption system .

Hereinafter, a hybrid system according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 6 to 9. FIG.

As shown in FIG. 6, this is an embodiment 1 of the present invention, in which a system combining an absorption type refrigeration / heat pump hybrid system for cooling and steam simultaneously, which combines a single effect absorption type refrigerator system and a double type single stage absorption type heat pump system .

(CON), regenerator (GEN) and condenser (CON) and regenerator (GEN) operating area (absorption liquid temperature, concentration, pressure) of the two-stage single stage absorption heat pump system of the single- Type absorption type refrigeration system in which a condenser (CON) and a regenerator (GEN) are commonly used, and a two-stage single-stage absorption type heat pump.

A more specific system will now be described.

A low-temperature heat source of about 12 ° C is supplied from the low-temperature evaporator 100 that houses the refrigerant, and the resulting steam is absorbed into the LiBr aqueous solution by the low-temperature absorber 110, and is converted from the high- The heat source generates cold water of about 7 ° C and supplies it to the external supply source and the cooling load.

The low concentration solution made in the low temperature absorber 110 is supplied to the regenerator 130 through the low temperature solution heat exchanger 120 by the solution pump 3 115;

A part of the concentrated solution of the regenerator 130 flows into the low temperature absorber 110 through the first throttling valve 131a after passing through the low temperature solution heat exchanger 120. As a result, the aqueous solution is mutually heat exchanged, .

The remaining concentrated solution is introduced into the hot absorber 150 through the hot solution heat exchanger 140 by the solution pump 2 (135);

The solution in the high temperature absorber 150 flows through the hot solution heat exchanger 140 and then through the second throttling valve 131b to the regenerator 130. The hot water in the outside is heated to a high temperature of 110 캜, And is supplied to a supply source or a necessary place where a heating load is generated.

The refrigerant vapor generated in the regenerator 130 is discharged into the liquid refrigerant by the condenser 160 and flows into the low temperature evaporator 100 through the expansion valve 162. The remaining refrigerant flows into the refrigerant pump 165 And is introduced into the high-temperature evaporator 170 by the high-temperature evaporator 170.

The vapor generated in the high-temperature evaporator 170 is absorbed in the LiBr aqueous solution in the high-temperature absorber 150 to be converted from the high-concentration solution to the low-concentration solution; And more particularly, to a combined cooling and steam simultaneous absorption refrigeration / heat pump hybrid system.

The water / LiBr absorption liquid is introduced into the low-temperature absorber 110 through the inlet of the low-temperature solution heat exchanger 120 to partially form the concentrated solution outlet of the regenerator 130 to form a single-effect absorption-type refrigerator system.

 On the other hand, the remaining flow rate of the concentrated solution outlet of the regenerator (GEN) 130 passes through the inlet of the high temperature solution heat exchanger (HHX, 140) by the absorption liquid pump (P2, 135) to form a two stage single stage absorption heat pump system, ABS (H), 150, respectively.

A portion of the condenser (CON) 160 is introduced into the evaporator (EVA (L) 100) through the expansion valve (EV) 161 to form a single-effect absorption refrigerator system.

On the other hand, the remaining flow rate of the refrigerant at the outlet of the condenser (CON) 160 is introduced into the high-temperature evaporator (EVA (H) 170) by the refrigerant pump P1,162 to form a two-stage single stage absorption heat pump system.

The refrigerant pump (P1,162) and the solution pump 2 (P2,135) determine the amount of refrigerant and absorption liquid in the two-stage single-stage absorption heat pump system, which is an important parameter for the performance of the two-stage single stage absorption heat pump system.

As shown in FIG. 6, the coolant and regenerator (GEN) and the high-temperature evaporator (EVA (H)) of the condenser and the low-temperature absorber (ABS The supply may be supplied in series by bundling two elements, or may be supplied in parallel by elements.

As shown in FIG. 7, it can be divided into a lower end portion and an upper end portion. The lower end portion represents a single effect absorption type refrigerator system, and the solution circulation between the regenerator and the absorber on the basis of the absorbed liquid is clockwise circulated. The pressure of the low pressure evaporator and the low temperature absorber forms a low pressure of about 5 ~ 7mmHg, and the condenser and the regenerator form an intermediate pressure of 45 ~ 60mmHg. Concentration is about 56% ~ 58% for diluted solution and about 60 ~ 62% for concentrated solution.

In addition, the upper part represents a two-stage single stage absorption heat pump system, and the solution circulation between the regenerator and the hot absorber on the basis of the absorption liquid is counterclockwise circulated. The pressure of the high-pressure evaporator and the high absorber forms a low pressure of about 350 to 400 mmHg, and the condenser and the regenerator form a high pressure of 45 to 60 mmHg. Concentration is about 56% ~ 58% for diluted solution and about 60 ~ 62% for concentrated solution. The concentration and temperature of the absorber solution in each cycle flowing into the regenerator may be different, but the concentration and temperature of the regenerator outlet are the same.

FIG. 8 is a schematic view showing Embodiment 2 of the present invention. In the configuration of the high-temperature evaporator and the low-temperature evaporator, the refrigerant introduced into the evaporator is not directly introduced into the evaporator heat transfer tube or heat exchanger but is formed into a refrigerant storage tank below the evaporator P4, and P5) so as to facilitate the heat transfer of the evaporation heat transfer pipe by appropriately supplying the refrigerant to the heat transfer pipe like the falling film evaporator.

For this, a refrigerant storage tank 180 is formed below the low-temperature evaporator 100 and the high-temperature evaporator 17 to circulate the refrigerant to the circulation pumps 4 and 5 (175, 105) Supply.

In addition, a capacity control valve 133 is added to the lower part of the regenerator 130 to regulate the supply amount of the absorption liquid flowing into the low temperature absorber 110; A refrigerant regulating valve 161 is provided under the condenser 160 to regulate a flow rate of the refrigerant flowing into the low temperature evaporator 100.

As shown in Fig. 9, this is an embodiment 3 of the present invention for increasing the cycle performance coefficient (COP) of the cooling / steam supply absorption refrigeration and heat pump hybrid system.

9, when the refrigerant heat exchanger (RHX, 190) is installed between the condenser and the high-temperature evaporator, the temperature of the refrigerant supplied to the high-temperature evaporator in the heat pump system can be increased to increase the evaporation amount of the refrigerant, The coefficient can be increased.

A refrigerant heat exchanger 190 is added between the high temperature evaporator 170 and the condenser 160 to exchange heat with the refrigerant flowing into the high temperature evaporator 170 from the condenser 160, To increase the evaporation amount by increasing the temperature of the refrigerant supplied to the evaporator.

In Examples 1 to 3, cooling water or air of a low-temperature heat source is introduced into the low-temperature absorber 110 and the condenser 160 in series or in parallel in each configuration (not shown)

The regenerator 130 and the high-temperature evaporator 170 are arranged so that the cooling water or air of the high-temperature heat source flows in series or in parallel (not shown) in each configuration; .

Further, the performance of the hybrid system is changed by the operating capacity of the refrigerant pump 1 (165) and the solution pump 2 (135); .

This is because the amount of refrigerant and absorption liquid of the two-stage single-stage absorption heat pump system is determined by the solution pumps 1 and 2 (P1 and P2), which is an important control parameter for the performance of the two-stage single stage absorption heat pump system.

The component including the low temperature evaporator 100, the low temperature absorber 110, the regenerator 130, and the condenser 160 is a single effect absorption refrigerator system,

A component comprising the high temperature evaporator 170, the hot absorber 150, the regenerator 130, and the condenser 160 is a two stage single stage absorption heat pump system,

Since the operation range of the condenser 160 and the regenerator 130 is the same as that of the single-stage absorption-type refrigerant system and the dual-stage single-stage absorption heat pump system, , A regenerator (130), and a two-stage single-stage absorption heat pump;

The present invention relates to a combined cooling and / or steam supply absorption refrigeration / heat pump hybrid system in which the refrigerator system or the heat pump system is selected and used separately, or the two systems are connected to each other to be used as a hybrid type absorption system .

It is possible to select the refrigerator or heat pump system or to use it at the same time by controlling the degree of opening of the valve installed in each component shown in the system as needed, and it is possible to control the heat load load weight of the refrigerator and the heat pump.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

100: low temperature evaporator 110: low temperature absorber
105: circulation pump 5 115: solution pump 3
120: low temperature solution heat exchanger 130: regenerator
131a: first throttling valve
131b: second throttling valve 133: capacity control valve,
135: solution pump 2
140: high temperature solution heat exchanger 150: high temperature absorber
160: condenser 162: expansion valve
161: Refrigerant control valve 165: Refrigerant pump 1
170: high temperature evaporator
175: circulation pump 4
180: refrigerant storage tank 190: refrigerant heat exchanger

Claims (7)

The vapor generated in the low temperature evaporator 100 containing the refrigerant is absorbed into the LiBr aqueous solution in the low temperature absorber 110 and is converted from the high concentration solution to the low concentration solution,
The low concentration solution in the low temperature absorber 110 is supplied to the regenerator 130 through the low temperature solution heat exchanger 120 by the solution pump 3 115,
A portion of the concentrated solution of the regenerator 130 flows into the low temperature absorber 110 through the first throttling valve 131a and the remaining concentrated solution flows into the solution pump 2 135, Temperature solution heat exchanger 140 to the high-temperature absorber 150,
The solution in the high temperature absorber 150 passes through the hot solution heat exchanger 140, passes through the second throttling valve 131b, flows into the regenerator 130 again,
The refrigerant vapor generated in the regenerator 130 is discharged into the liquid refrigerant by the condenser 160 and flows into the low temperature evaporator 100 through the expansion valve 162. The remaining refrigerant flows into the refrigerant pump 165 ) Into the high-temperature evaporator (170);
The vapor generated in the high-temperature evaporator 170 is absorbed in the LiBr aqueous solution in the high-temperature absorber 150 to be converted from the high-concentration solution to the low-concentration solution,
A refrigerant storage tank 180 is formed below the low-temperature evaporator 100 and the high-temperature evaporator 170 to circulate the refrigerant to the circulation pumps 4 and 5 (175, 105) to supply the refrigerant to the heat- To promote the heat transfer of the evaporator,
A capacity control valve 133 is added to the lower part of the regenerator 130 to regulate the supply amount of the absorption liquid flowing into the low temperature absorber 110 and a refrigerant regulating valve 161 is added to the lower part of the condenser 160, The flow rate of the refrigerant flowing into the evaporator 100 is controlled,
A refrigerant heat exchanger 190 is added between the high temperature evaporator 170 and the condenser 160 to exchange heat with the refrigerant flowing into the high temperature evaporator 170 from the condenser 160 and supplied to the high temperature evaporator 170 The temperature of the refrigerant is increased to increase the evaporation amount,
The regenerator 130 and the high temperature evaporator 170 are connected to the cooling water of the high temperature heat source and the cooling water or air of the low temperature heat source are introduced into the low temperature absorber 110 and the condenser 160 in series, Or air to be introduced in series, or in parallel in each configuration,
The performance of the hybrid system is changed by the operating capacity of the refrigerant pump 1 (165) and the solution pump 2 (135), and the supply amount of the absorption liquid is controlled proportionally according to the amount of cooling heat or steam required in the customer, Wherein the control unit is configured to control the refrigerant / heat pump hybrid system.
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