KR960005668B1 - Double effective absorption type refrigerator - Google Patents

Abstract

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Description

Double-Day Absorption Chiller

1 is a schematic diagram of a double-effect absorption hot and cold water heater showing an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: evaporator 2: absorber

3: evaporator absorber body 4: high temperature regenerator

6: low temperature regenerator 7: first condenser

8: low temperature regenerator condenser body 9: low heat regenerator

10 second condenser 11 low heat source regenerator condenser body

12: low temperature heat exchanger 13: high temperature heat exchanger

16: dilute absorbent liquid pump 19: dilute absorbent liquid piping

22: intermediate absorption liquid pump 25: intermediate absorption liquid piping

31: concentrated absorbent liquid 50: concentrated absorbent pump

51: absorption liquid pump

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorption chillers, and more particularly, to a double-duplex absorption chiller having a low heat source regenerator condenser containing a low heat source regenerator and a condenser.

For example, Japanese Patent Application Laid-Open No. 61-13546 discloses a refrigeration cycle by connecting a high temperature regenerator, a low temperature regenerator, a condenser, an evaporator, an absorber, a low temperature heat exchanger, and a high temperature heat exchanger using a high temperature heat source as a heating source. An absorption chiller for a double-use dual-use bottle is disclosed, in which a condenser is provided with an auxiliary regenerator (auxiliary generator) using a low temperature heat source as a heating source, a thin absorbent liquid tube is connected to the upper part of the auxiliary regenerator, and a dark absorbent liquid tube is connected to the lower part. .

In the prior art, when the auxiliary regenerator, the low temperature regenerator and the condenser are housed in a single fuselage, the volume of the fuselage is increased, and the pipe is connected by installing the fuselage in place of the cold regenerator condenser fuselage of the conventional dual-effect absorption chiller. As a result, it is necessary to operate the control valve and the shut-off valve installed in the pipe to switch between the single-use operation and the double-use operation, resulting in a complicated configuration and switching to the single-use operation and the double-use operation.

An object of the present invention is to provide a single-double absorption absorption chiller which can simplify the configuration and facilitate the switching between the single-effect operation and the double-effect operation.

In order to solve the above problems, the present invention provides an evaporator absorber 3, a high temperature regenerator 4, a low temperature regenerator condenser actuator 8, a low temperature heat exchanger 12, a high temperature heat exchanger 13 and a thin absorbent liquid pump 16. ), A low heat source regenerator 9 having a low temperature heat source as a heat source, and a low heat source regenerator condenser body 11 containing the condenser 10, and a thin absorbent liquid pump 16 from the absorber 2. The intermediate absorbent liquid pipe (25) from the low heat source regenerator (9) to the high temperature regenerator (4) having a thin absorbent liquid pipe (19) passing through the low heat source regenerator (9) and the intermediate absorbent liquid pump (22), and a low temperature. The thick absorbent liquid pipe 31 from the regenerator 6 to the absorber 2 through the low temperature heat exchanger 12, the intermediate absorbent liquid pipe 25 and the low temperature heat exchanger 12 on the suction side of the intermediate absorbent liquid pump 22. The double-duplex absorption chiller having an absorbent liquid pipe 32 for connecting with the deeper absorbent liquid pipe 31 on the upstream side. The ball, simplifying the structure of the daytime dual utility absorption refrigerating machine, and at the same time to facilitate conversion of the Japanese-Chinese utility operation and, singlet double combined operation.

In addition, the absorption liquid pipe 32 is lower than the low temperature regenerator condensate body 8, and is connected to the position where the U seal between the low temperature regenerator condenser body 8 and the low heat source regenerator condenser body 11 is maintained. The refrigerator is provided to stabilize the single-use operation.

In addition, low temperature heat exchanger 12 from the low heat source regenerator condenser body 11, the thin absorbent liquid pipe 19, the intermediate absorbent liquid pipe 25, and the low temperature regenerator 6 through the low temperature heat exchanger 12 to the absorber 2 Absorbent liquid pipe (32) connecting the concentrated absorbent liquid pipe (31) provided with the concentrated absorbent liquid pump (50) on the upstream side of the pump), and the suction side of the concentrated absorbent liquid pump (50) and the suction side of the intermediate suction liquid pump (22). The dual-effect absorption chiller provided with () facilitates the switching between the single-effect operation and the double-effect operation, and at the same time makes the single-effect operation more stable.

The operation of the present invention configured as described above allows the intermediate absorbent liquid from the low heat source regenerator 9 to the intermediate absorbent liquid pipe 25, the absorbent liquid pipe 32, the concentrated absorbent liquid pipe 31, and the low temperature when the intermediate absorbent liquid pump 22 is stopped. After the heat exchanger 12 flows to the absorber 2, the single-use nuclear power plant is operated, and when the intermediate absorbent liquid pump 22 is operated, the intermediate absorbent liquid passes from the low heat source regenerator 9 to the intermediate absorbent liquid pipe 25 and is a high temperature regenerator. Flowing to (4) is performed, the single-duplex operation is performed, and it is possible to easily switch between the single-use operation and the double-duplex operation by stopping or driving the intermediate absorbent liquid pump 22.

In the single-use operation, the U seal between the low temperature regenerator condensate body 8 and the low heat source regenerator condensate body 11 is completely made by the absorption liquid pipe 32 installed at a lower position than the low temperature regenerator condensate body 8. Driving can be stabilized.

In addition, the intermediate absorbent liquid is operated from the low heat source regenerator 9 to the intermediate absorbent liquid pipe 25, the absorbent liquid pipe 32, the concentrated absorbent liquid pump 50 and the concentrated absorbent liquid pipe 31 by operating the concentrated absorbent liquid pump 50. After passing through the absorber 2, the absorbing liquid of the absorber 2 is ensured, and operation | movement can be made more stable.

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

1 is a schematic configuration diagram of a double-duplex absorption cold / hot water machine using a lithium embrittlement (LiBr) solution in a refrigerant, for example, water and an absorbent liquid (solution), (1) is an evaporator, (2) is an absorber, and (3) Is an evaporator absorbent body containing the evaporator 1 and the absorber 2 (hereinafter referred to as a "lower body"). (4) shows, for example, a high temperature regenerator heated by a high temperature heat source with a gas burner (5), (6) a low temperature regenerator, and (7) a condenser for the low temperature regenerator 6 (hereinafter referred to as "first condenser"). Is called). Denoted at 8 is a low temperature regenerator condenser body containing the low temperature regenerator 6 and the first condenser 7 (hereinafter referred to as "first homolog"). (9) is, for example, a low heat source regenerator using a hot water source having a temperature of approximately 80 ° C. as a low temperature heat source, (10) a condenser for the low heat source regenerator 9 (hereinafter referred to as a "second condenser"), and (11) The low heat source regenerator condenser body (hereinafter referred to as the second homogenous body), which houses the low heat source regenerator 9 and the second condenser 10, 12 is a low temperature heat exchanger, and 13 is a high temperature heat exchanger.

(14) is a thin absorbent liquid pool portion formed below the absorber (2) under the absorber (2), and the low heat source regenerator (9) of the thin absorbent liquid pool (14) and the second homology body (11). The upper gaseous part of the pipe is connected by a thin absorbent liquid pipe (19) consisting of a thin absorbent liquid pipe (15), a thin absorbent liquid pump (16), and a thin absorbent liquid pipe (17). In addition, the intermediate absorbent liquid pump part 20 and the intermediate absorbent liquid pipes 21, 23, and 34 are formed between the intermediate absorbent liquid pool 20 and the gas phase part of the high temperature regenerator 4 formed under the second homolog 11. The pipe is connected by an intermediate absorption liquid pipe (25).

Reference numeral 26 denotes an intermediate absorption liquid pool formed in the high temperature regenerator 4, and the intermediate absorption liquid pool 26 and the gas phase part of the low temperature regenerator 6 are connected to each other by intermediate absorption liquid pipes 27 and 28. have. Further, below the low temperature regenerator 6, the thick absorbent liquid pool portion 29 formed in the lower portion of the first homolog 8 and the thick absorbent liquid spraying device 30 in the upper portion of the absorber 2 are concentrated. Is connected by a thick absorption liquid piping (31). The absorbent liquid tube 32 is connected to the intermediate absorbent liquid tube 21 on the suction side of the intermediate absorbent liquid pump 22 and the thick absorbent liquid tube 31A on the upstream side of the low temperature heat exchanger 12. The absorbing liquid pipe 32 is lower than the height of the low temperature regenerator condenser body 8, and even if a difference between the pressure in the low heat source regenerator condenser 11 and the pressure in the low temperature regenerator condenser 8 occurs, the respective bodies are U-shaped. It is connected to the position which can be sealed.

Reference numeral 33 denotes an intermediate absorption liquid pipe, and the intermediate absorption liquid pipe 33 is connected to the intermediate absorption liquid pipe 27 and the absorber 2 on the upstream side of the high temperature heat exchanger 13. 34 is an on-off valve provided in the intermediate absorption liquid pipe 33, and this on-off valve 34 is closed at the time of cold water supply and open at the time of hot water supply. Reference numeral 35 denotes a coolant tube, which is connected to the first condenser 7 from the gas phase part of the high temperature regenerator 4 through the low temperature regenerator 6. The 35A is a refrigerant increasing engine connected between the refrigerant pipe 35 on the inlet side of the low temperature regenerator 6 and the absorber 2, and the opening / closing valve 35B is provided in the middle of the refrigerant increasing pipe 35A. (36) (37) and (38) are refrigerant liquid tubes, respectively, and the refrigerant liquid tubes (36) (37) and (38) between the first condenser (7) and the second condenser (10) and the evaporator (1). Piping is connected. Numeral 39 denotes a refrigerant liquid circulation tube piped between the refrigerant liquid solidification part 1A of the evaporator 1 and the refrigerant spray device 1B, and the refrigerant pump 40 is in the middle of the refrigerant liquid circulation tube 39. It is installed. Reference numeral 41 denotes a coolant liquid drain tube connected between the coolant liquid collecting part 1A and the thin absorbent liquid collecting part 14, and an opening / closing valve 42 is provided in the middle of the coolant liquid drain pipe 41. .

Reference numeral 43 denotes a cold / hot water heat exchanger installed in the evaporator 1, and 44 and 45 are cold / hot water pipes connected to the cold / cold water heat exchanger 43. Reference numeral 66 denotes a cooling water pipe, and the cooling water pipe 46 passes from the cooling tower (not shown) to the cooling tower after passing through the absorber heat exchanger 2A, the first condenser heat exchanger 7A, and the second condenser heat exchanger 10A. The cooling water circulation path is formed. Reference numeral 47 denotes a cooling water pipe, and the cooling water pipe 47 is disposed between the cooling water pipe 46A and the cold / hot water pipe 45 extending from the first condenser heat exchanger 7A to the second condenser heat exchanger 10. Connected. In the absorption chiller operation, the coolant flows in the order of the absorber 2, the first condenser 7, and the second condenser 10. 48 is an open / close valve provided in the middle of the coolant pipe 47, and the open / close valve 48 is opened at the time of hot water supply and at the same time storing the cooling water path in the cooling drain pipe 46.

Reference numeral 49 denotes a heat source flow rate control valve, and the opening degree of the control valve 49 is adjusted by the outlet temperature of the cold / hot water heat exchanger 43.

Next, the operation of the single-double absorption absorption cold / hot water machine will be described.

(a) Single-use effect (一 重 效用 運轉)

When a sufficient amount of heat is obtained from the warm wastewater, which is a low temperature heat source, the intermediate absorption liquid pump 22 stops operation. At this time, when cold water is supplied from the cold / hot water heat exchanger 43 to the load, each of the on / off valves 34, 35B, 42, and 48 is opened. In addition, the thin absorbent liquid pump 16 and the refrigerant pump 40 are operated to operate the low heat source regenerator 9, the second condenser 10, the evaporator 1, the absorber 2, and the low temperature heat exchanger 12, respectively. This constitutes a refrigeration cycle. Here, the thin absorbent liquid discharged from the thin absorbent liquid pump 16 is sent to the low heat source regenerator 9 through the low temperature heat exchanger 12. In the low heat source regenerator 9, the thin absorbent liquid is heated by warm drainage to separate the refrigerant from the thin absorbent liquid.

The intermediate absorbent liquid whose concentration was increased by separating the refrigerant with the low heat source regenerator 9 was the intermediate absorbent liquid tube 21, the absorbent liquid tube 32, the concentrated absorbent liquid tube 31A, the low temperature heat exchanger 12, and the concentrated absorption tube 31B. Sprayed into the absorber (2). The refrigerant separated by the low heat source regenerator 9 flows into the second condenser 10 to be cooled and condensed. The refrigerant liquid then flows through the refrigerant liquid pipes 37 and 38 to the evaporator 1. The refrigerant liquid accumulated in the refrigerant liquid holding part 1A of the evaporator 1 is sprayed on the cold / hot water heat exchanger 43 by the operation of the refrigerant pump 40. The cold water cooled by latent heat when the refrigerant liquid vaporizes is supplied to the load from the cold / hot water heat exchanger (43). The refrigerant evaporated in the evaporator 1 flows into the absorber 2 and is absorbed by the concentrated absorption liquid.

(b) Dual-China Combined Operation (一 重 二 重 倂 用 運轉)

When the temperature of the warm water is lowered and the outlet temperature of the cold water becomes higher than the set temperature only by the single-use effect, the intermediate absorbent liquid pump 22 operates and the burner 5 of the high temperature regenerator 4 burns. Then, the absorber 2, the low heat source regenerator 9, the high temperature regenerator 4, the high temperature heat exchanger 13, the low temperature regenerator 6, the low temperature heat exchanger 12, the first condenser 7 and the second condenser The refrigeration cycle is comprised by 10 and the evaporator 1. The intermediate absorption liquid of the low heat source regenerator 9 is sent to the high temperature regenerator 4 by the intermediate absorption liquid pump 22 and heated to separate the refrigerant. The intermediate absorbent liquid whose concentration is increased in the high temperature regenerator 4 is sent to the low temperature generator 6 through the high temperature heat exchanger 13 like the conventional dual-effect absorption chiller. The intermediate absorbent liquid is heated by the low temperature regenerator 6 to further separate the refrigerant to increase the concentration, and the concentrated absorbent liquid is passed through the low temperature heat exchanger 12 to the absorber 2 and sprayed.

The refrigerant separated by the low heat source regenerator 9 is condensed by the second condenser 10, and the refrigerant separated by the low temperature regenerator 6 is condensed by the first condenser 7. Then, the refrigerant flows from the first condenser 7 and the second condenser 10 to the evaporator 1 through the refrigerant liquid pipes 36, 37, 38. The cold water cooled by the cold / hot water heat exchanger 43 is supplied to the load. In addition, the refrigerant evaporated in the evaporator 1 flows into the absorber 2 and is absorbed by the concentrated absorption liquid. In addition, when hot water is supplied to a load, open / close valves 34, 35B, 42 and 48 are opened to supply a high-temperature refrigerant to the lower body 3 to remove hot water from the evaporator 1.

According to this embodiment, the second homogenizer 11 containing the low heat source regenerator 9 and the second condenser 10 is installed on the first homolog of the conventional dual-effect absorption chiller, and the thin absorption pipe 17 (19), intermediate absorbent liquid pipes 21, 23, 24, intermediate absorbent liquid pumps 22, refrigerant liquid pipes 37, cooling water pipes 46, etc. It is possible to simply configure the dual-effect absorption hot and cold water heater without installing a. In addition, by controlling the operation or stop of the intermediate absorbent liquid pump 22 according to the capacity of the low heat source generator 9, that is, the heat quantity of the hot water, the absorbed liquid flow of the absorbent liquid pipe 32 is switched, and the operation of the high temperature regenerator 4 is performed. By controlling this, it is possible to easily switch between the single-use operation and the double-duplex operation.

Also, the position where the absorbent liquid tube 32 is lower than the first homology body 8 to hold the U seal between the first homology body 8 and the second homology body 11 during the single-effect operation. In the case where the pressure in the first homogeneous body 8 decreases, the intermediate absorbent liquid can be prevented from flowing into the low temperature regenerator 6 from the low heat source regenerator 9, and the water in the absorber 2 can be prevented. Absence of absorbent liquid can be avoided. As a result, cavitation and the like of the thin absorbent liquid pump 16 can be prevented, so that the single-effect operation can be stabilized.

In addition, as shown by the dotted line in FIG. 1, the concentrated absorbent liquid pump 50 is provided in the concentrated absorbent liquid pipe 31A upstream of the low temperature heat exchanger 12. As shown in FIG. Further, the concentrated absorbent liquid tube 31A and the concentrated absorbent liquid tube 31B on the suction side of the concentrated absorbent liquid pump are connected to the absorbent liquid tube 51. In this way, the thick absorbent liquid pump 50 and the absorbent liquid tube 51 are installed, and the concentrated absorbent liquid pump 50 is operated to convert the intermediate absorbent liquid of the low heat source regenerator 9 into the intermediate absorbent liquid tube 21 and the absorbent liquid during single-use operation. The tube 32, the concentrated absorbent liquid pump 50, the low temperature heat exchanger 12, and the concentrated absorbent liquid tube 31B can be reliably returned to the absorber 2, and the absorbent liquid tube 51 allows the low temperature regenerator ( 29) can be reliably U-sealed between the absorber 2, and the single-effect operation can be made more stable by avoiding the lack of the thin absorbent liquid of the absorber 2.

In addition, in the above embodiment, the description was made based on the double-effect absorption cold water heater for supplying cold water or hot water, but the second homology body 11 is similarly used in the double-effect absorption chiller for supplying only cold water. The same effect can be obtained by installing and connecting the pipes.

The present invention is a dual-duplex absorption chiller configured as in the above embodiment, and unlike the low temperature regenerator condenser, the reheat source regenerator condenser is installed, and the thin absorbent pipe connected to the low heat source regenerator from the absorber to the dilute absorbent pump, The intermediate absorbent pipe from the low heat source regenerator through the intermediate absorbent pump to the high temperature regenerator; and the absorbent pipe connecting the intermediate absorbent pipe from the suction side of the intermediate absorbent pump to the dark absorbent pipe from the low temperature regenerator to the low temperature heat exchanger. As a result, the structure of the single-effect dual-purpose absorption chiller can be simplified, and the switching between the single-use operation and the double-duplex operation can be easily performed by the operation of the intermediate absorbent pump, the stop, and the operation control of the high temperature regenerator. .

In addition, the absorbent liquid pipe connecting the intermediate absorbent liquid pipe and the concentrated absorbent liquid pipe on the suction side of the intermediate absorbent liquid pump is lower than the low temperature regenerator condenser body in a position where U seal is maintained between the low temperature regenerator condenser body and the low heat source regenerator condenser body. By connecting, it is possible to prevent the absorbent liquid from flowing to the low temperature regenerator during the single-use operation, and to accumulate in a large amount, and to stabilize the operation by avoiding the lack of the absorbent liquid of the absorber.

In addition, by installing a thick absorbent pump in the thick absorbent pipe upstream of the low temperature heat exchanger, and connecting the suction side of the concentrated absorbent pump and the suction side of the intermediate absorbent pump to the absorbent liquid pipe, The absorbent liquid can be reliably returned to the absorber by the thick absorbent liquid pump, and the operation of the single-duplex dual-effect absorption chiller can be made more stable.

In addition, the operation cost can be reduced by stopping the intermediate absorbent liquid pump 22 during the single-use operation, and the absorbent liquid is supplied from the low heat source regenerator 9 to the high temperature generator 4 and the low temperature generator 6. Passes and flows to the absorber 2, the circulation path of the absorbing liquid is shortened to reduce the flow path resistance can improve the operating efficiency.

Claims (3)

An evaporator absorber body 3 containing the evaporator 1 and the absorber 2, a high temperature regenerator 4, a low temperature regenerator 6, a low temperature regenerator condenser body 8 containing a condenser, a low temperature heat exchanger 12, In an absorption chiller in which a high temperature heat exchanger (13) and a thin absorbent liquid pump (16) are connected to each other, a low heat source regenerator (9) using a low temperature heat source as a heat source, and a low heat source regenerator condenser body (11) containing the condenser (10) ), A thin absorbent liquid pipe (19) from the absorber (2) through the thin absorbent liquid pump (16) to the low heat source regenerator (9), and an intermediate absorbent liquid pump (22), and a high temperature regenerator (from the low heat source regenerator (9)). 4) on the suction side of the intermediate absorbent liquid pipe 25 leading to the absorber 2 from the low temperature regenerator 6 to the absorber 2 through the low temperature heat exchanger 12, and the intermediate absorbent liquid pump 22; The absorbent liquid pipe 32 which connects the intermediate absorbent liquid pipe 25 and the thick absorbent liquid pipe 31 upstream than the low temperature heat exchanger 12 Double-effect absorption chiller, characterized in that. 2. The absorbent liquid pipe (32) according to claim 1, wherein the absorbent liquid pipe (32) is lower than the low temperature regenerator condensation body (8) and is positioned at a position for holding a U seal between the low temperature regenerator condenser body (8) and the low heat source regenerator condenser body (11). Single-duplex absorption chiller, characterized in that connected. An evaporator absorber body 3 containing the evaporator 1 and the absorber 2, a high temperature regenerator 4, a low temperature regenerator 6, a low temperature regenerator condenser body 8 containing a condenser, a low temperature heat exchanger 12, In an absorption chiller in which a high temperature heat exchanger (13) and a thin absorbent liquid pump (16) are connected to each other, a low heat source generator (9) having a low temperature heat source as a heat source and a low heat source regenerator condenser body (11) containing the condenser (10) And a thin absorbent liquid pipe (19) from the absorber (2) through the thin absorbent liquid pump (16) to the low heat source regenerator (9), and the intermediate absorbent liquid pump (22), and the high temperature generator (4) from the low heat source regenerator (9). And a thick absorbent liquid pump (50) upstream of the low temperature heat exchanger (12) from the low temperature regenerator (6) through the low temperature heat exchanger (12) to the absorber (2). Absorption liquid pipe (3) connecting the concentrated absorbent liquid pipe (31) and the suction side of the concentrated absorbent liquid pump (50) and the suction side of the intermediate suction liquid pump (22). Double-effect absorption chiller, characterized in that provided with 2).