JPH07120098A - Engine exhaust heat recovery absorption type hot and chilled water generator - Google Patents

Abstract

PURPOSE:To improve the energy efficiency of a hot and chilled water generator by effectively utilizing engine exhaust heat even of a high temperature or a low temperature and to simplify the structure of an apparatus by integrating a high temperature generator, an intermediate temperature generator and a low temperature generator without forming a shell in a pressure-resistant vessel. CONSTITUTION:A generator-integrated unit B in which a high temperature generator 6, an intermediate temperature generator 7, an exhaust gas cooling water heat exchanger 8 and a low temperature generator 9 are integrated is installed outside a shell A which contains a condenser 2, an evaporator 3 and an absorber 4. Steam is generated from dilute solutions in the generators 6 and 7 by engine exhaust gas, and steam is generated from dilute solution in the generator 9 by engine cooling water heated by the engine exhaust gas by the exchanger 8. Further, the solutions in the generators 7, 9 are heated by the steams generated in the generators 6, 7 thereby to increase the amount of steam generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine exhaust heat recovery absorption chiller-heater which effectively utilizes engine exhaust and engine cooling water to produce chilled water.

[0002]

2. Description of the Related Art A conventional basic single-effect absorption refrigerator is shown in FIG. Then, the basic principle of the single-effect absorption refrigerator will be described with reference to FIG. In the generator 101 of the single-effect absorption refrigerating machine 100, a burner 102 that uses fuel gas, kerosene, high-pressure steam, or the like as a heating source absorbs an absorbing liquid (dilute solution: lithium bromide having a small solubility of about 55% by weight). That is, when an aqueous solution having a large water content) is heated, water vapor is generated from the absorbing liquid. This water vapor is condensed by the condenser 103.
Thus, the cooling water flowing in the cooling water pipe 104 is heated to be condensed water.

This condensed water is transferred to the evaporator 1 in the shell 105.
The cold water pipe 107 constituting 06 is evaporated and evaporated, and heat is taken from the used cold water flowing in the cold water pipe 107 to lower the temperature of the used cold water to 7 ° C to 10 ° C. This used cold water is introduced into the room and is passed through a fan coil unit (not shown) or the like to obtain a cooling effect. The condensed water that has not completely evaporated in the evaporator 106 is stored in the refrigerant pump 108.
And is sprayed again on the cold water pipe 107.

Next, the water vapor evaporated in the evaporator 106 is
The absorption liquid (concentrated solution: one having a high solubility of lithium bromide of about 60% by weight, that is, an aqueous solution having a small water content) is absorbed by the absorber 109 in the shell 105. At this time, since absorbed heat is generated, the cooling water flowing in the cooling water pipe 104 removes the heat.

The concentrated solution is an absorption liquid after steam is generated in the generator 101, and the concentration of lithium bromide is high. Since the higher the concentration of the absorbing solution, the better the water absorption, it is necessary to always send the concentrated solution into the absorber 109. The absorption liquid after absorbing the water, that is, the dilute solution is the absorption liquid pump 110.
Then, it is circulated to the generator 101 again to complete the cycle.
In addition, 111 is a solution heat exchanger which heat-exchanges a concentrated solution and a dilute solution.

Next, a conventional basic double-effect absorption refrigerator 200 is shown in FIG. In addition, 201 is a high temperature generator that heats the absorbing liquid by a burner 202, 203 is a low temperature generator, 204 is a condenser, 205 is a cooling water pipe, and 20
6 is an evaporator in the shell 207, 208 is cold water piping,
209 is a refrigerant pump, 210 is an absorber in the shell 207, 211 is an absorption liquid pump, 212 is a high temperature solution heat exchanger, 213 is a low temperature solution heat exchanger, and 214 is an extraction device.

Such a double-effect absorption refrigerator 200
Compared to the single-effect absorption refrigerator 100, the low temperature generator 203 is heated by the steam generated in the high temperature generator 201. Therefore, the amount of steam generated from the single-effect absorption refrigerating machine 100 is increased, so that the refrigerating effect is increased. However, in the double-effect absorption refrigerating machine 200, the steam generated in the high temperature generator 201 must have a saturation temperature sufficient for heating and absorbing the absorbing solution in the low temperature generator 203. Therefore, the combustion temperature of the burner 202 needs to be higher than the combustion temperature of the burner 102 of the single-effect absorption refrigerator 100.

Therefore, a dual-effect single-effect combined type engine exhaust heat recovery absorption chiller-heater capable of raising the temperature of the heat source from the single-effect absorption chiller 100 (JP-A-58-58).
No. 99661, etc.) is known. This engine exhaust heat recovery absorption-type chiller-heater guides high-temperature engine exhaust (for example, around 500 ° C), which is a heating source, to a high-temperature generator, lowers the exhaust temperature to around 200 ° C, and generates steam at around 140 ° C. , As a heat source for the low temperature generator.

[0009]

However, in the conventional engine exhaust heat recovery absorption and chiller-heater, the high-temperature generator and the low-temperature generator are provided separately, so that it is difficult to make them compact. was there. In addition, it is desirable to use a high-temperature heat source at a temperature as high as possible, but in the conventional engine exhaust heat recovery absorption type chiller-heater, the energy with a high utilization efficiency of originally about 500 ° C is about 200 ° C. Since it is used as a heat source with low utilization efficiency, and since the engine exhaust at around 200 ° C is completely discarded as it is, there is a problem that the energy efficiency is very poor.

As one of the methods for effectively utilizing a high-temperature heat source, exhaust heat is absorbed by dividing it into three stages of temperature zones.
Although a heavy-duty cycle is conceivable, it is necessary to add a high-temperature generator to the conventional engine exhaust heat recovery absorption chiller-heater, which causes a problem of complicated structure. It is also possible to put the high temperature generator in an integrated shell that contains a condenser, evaporator, and absorber, but increasing the temperature of the absorbing liquid will increase the internal pressure. There is also a problem that it is necessary to use a pressure-resistant container and the cost increases.

The present invention makes it possible to improve the energy efficiency by effectively utilizing the engine exhaust heat from high temperature to low temperature, and also, without making the shell into a pressure resistant container, a high temperature generator, a medium temperature generator and a low temperature generator. An object of the present invention is to provide an engine exhaust heat recovery and absorption type chiller-heater which can simplify the structure of the equipment by integrating the generator.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a condenser for condensing steam by heat exchange between steam and cold water that has flowed in, and condensed water and hot water produced by the condenser are heat-exchanged. An evaporator for evaporating condensed water and a shell for accommodating an absorber for absorbing water vapor produced by this evaporator into a concentrated solution, and a shell separately provided for this shell, which is used for the hot engine exhaust and the aqueous solution. A high-temperature generator that heat-exchanges to generate steam from the aqueous solution, steam generated from the high-temperature generator and the medium-temperature engine exhaust heat deprived of heat by the high-temperature generator and the aqueous solution are heat-exchanged to generate steam from the aqueous solution. A medium temperature generator for heating, a cooling water heater for heating the engine cooling water by exchanging heat between the engine exhaust and the engine cooling water deprived of heat by the medium temperature generator, and the medium temperature generator. A generator-integrated unit that integrates a low-temperature generator that heat-exchanges steam and engine cooling water heated by the cooling-water heater with an aqueous solution to generate steam from the aqueous solution, the high-temperature generator, and the intermediate-temperature generation And a condensed water flow path for sending condensed water and steam generated in the low temperature generator to the condenser in the shell, and a concentrated solution remaining in each of the high temperature generator, the intermediate temperature generator and the low temperature generator. A concentrated solution flow path for sending to the absorber in the shell, and a dilute solution flow path for dividing the diluted solution made by the absorber in the shell into each of the high temperature generator, the intermediate temperature generator and the low temperature generator. The technical means with and were adopted.

[0013]

According to the present invention, in the high temperature generator of the generator-integrated unit, when heat is applied to the aqueous solution by the high temperature engine exhaust, steam is generated from the aqueous solution. Then, when heat is applied to the aqueous solution by the medium temperature engine exhaust, which has been deprived of heat by the high temperature generator, steam is generated from the aqueous solution. Furthermore, when heat is given to the engine cooling water by the engine exhaust deprived of heat by the medium temperature generator, the engine cooling water is heated by the cooling water heater. Then, in the low temperature generator, heat is applied to the aqueous solution from the engine cooling water heated by the cooling water heater to generate steam from the aqueous solution.

On the other hand, the steam generated in the high temperature generator or the intermediate temperature generator increases the amount of steam generated by applying heat to the aqueous solution in the intermediate temperature generator or the low temperature generator. Then, the steam generated in the high temperature generator and the steam generated in the intermediate temperature generator give heat to the aqueous solution in the intermediate temperature generator and the low temperature generator to condense. Then, the condensed water and the steam generated by the low temperature generator,
The condensed water is guided to the condenser in the shell through the condensed water flow path, the condensed water is sensible cooled by the cold water, the steam is condensed, and the condensed water is evaporated by the warm water in the evaporator. At this time, the cold water takes heat from the steam to raise the water temperature, and the hot water gives heat to the condensed water to lower the water temperature. Therefore, the cold water or hot water is used to heat or cool the room.

The water vapor evaporated in the evaporator is absorbed by the concentrated solution remaining in the high temperature generator, the intermediate temperature generator and the low temperature generator, which is guided from the concentrated solution flow path in the absorber, and becomes a diluted solution, resulting in a diluted solution flow. A high temperature generator, a medium temperature generator, and a low temperature generator are led through the path. With the above operation, the triple effect absorption cycle is established. In addition, the high temperature generator, the medium temperature generator, the cooling water heater and the low temperature generator are integrated so that it can be made compact, and since the high temperature generator is provided outside the shell, it is necessary to make the shell a pressure resistant container. There is no.

[0016]

【Example】

[Structure of Embodiment] Next, an engine exhaust heat recovery absorption type chiller-heater of the present invention will be described based on an embodiment shown in FIGS. 1 to 3. FIG. 1 is a diagram showing an engine exhaust heat recovery absorption type chiller-heater, and FIGS. 2 and 3 are diagrams showing a generator-integrated unit.

The engine exhaust heat recovery / absorption type chiller-heater 1 is for making cold water and hot water by effectively utilizing the engine exhaust gas of the engine E and engine cooling water.
And a shell A accommodating the absorber 4 and the like, and a generator-integrated unit B in which a high temperature generator 6, a medium temperature generator 7, an exhaust cooling water heat exchanger 8 and a low temperature generator 9 are integrated. These are condensed water pipes 10 and 11 in which condensed water and water vapor flow inside, a concentrated solution in the inside (absorption liquid having a large solubility of lithium bromide of about 60% by weight, that is, an aqueous solution having a small water content). Flowing concentrated solution pipe 1
2, and a dilute solution (with a lithium bromide solubility of 55
They are connected by a dilute solution pipe 13 through which an absorbing liquid having a small weight percentage, that is, an aqueous solution having a large water content) flows.

The condensed water pipe 10 is the condensed water flow passage of the present invention, and collects the steam generated in the high temperature generator 6 and the intermediate temperature generator 7 and the condensed water condensed thereafter to the shell A.
It is a pipe for sending to the condenser 2 inside. The condensed water pipe 11 is the condensed water flow path of the present invention, and is a pipe for sending the steam generated in the low temperature generator 9 to the condenser 2 in the shell A. The concentrated solution pipe 12 is the concentrated solution flow path of the present invention, and is a pipe for collecting the concentrated solution remaining in the high temperature generator 6, the intermediate temperature generator 7 and the low temperature generator 9 and sending the absorber 4 in the shell A. Is. The dilute solution pipe 13 is the dilute solution flow path of the present invention, and is a pipe for dividing the dilute solution remaining in the shell A into the high temperature generator 6, the intermediate temperature generator 7, and the low temperature generator 9.

The engine E is, for example, a 2000 cc engine that drives the generator 5 to rotate, and heat is generated by burning a fuel such as gasoline oil or diesel oil.
The engine E includes an exhaust pipe 14 for exhausting engine exhaust generated during combustion of fuel to the outside, and the engine E.
Cooling water pipe 15 for circulating engine cooling water for cooling the engine
Is equipped with.

As shown in FIG. 2, a plurality of exhaust pipes 16 are provided in the high temperature generator 6 of the generator-integrated unit B, and a plurality of exhaust pipes 14 are provided in the intermediate temperature generator 7. The exhaust passage pipe 17, the plurality of exhaust passage pipes 18 provided in the exhaust cooling water heat exchanger 8, and the connecting pipes 19 and 20 connecting these pipes, respectively.

At the upstream and downstream ends of the plurality of exhaust flow passage pipes 16-18, upstream headers 21-23 for distributing engine exhaust to the respective exhaust flow passage pipes 16-18, and each exhaust flow passage pipe. Downstream headers 24 to 26 for collecting engine exhaust from 16 to 18 are connected to each other. Connection tube 1
Reference numeral 9 connects the downstream header 24 and the upstream header 22, and the connection pipe 20 connects the downstream header 25 and the upstream header 23.

The cooling water pipe 15 connects a water jacket (not shown) of the engine E and the generator-integrated unit B, and the exhaust cooling water heat exchanger 8 and the low temperature generator 9 are connected.
It has a connecting pipe 28 for connecting with a plurality of cooling water flow passage pipes 27 therein.

At the upstream and downstream ends of the plurality of cooling water passage pipes 27, an upstream header 29 for distributing engine cooling water to the plurality of cooling water passage pipes 27 and a plurality of cooling water passage pipes 27.
A downstream header 30 for collecting more engine cooling water is connected.

The condenser 2 is composed of a coil tube 31 into which cold water cooled by a cooling tower or the like (not shown) flows in via a cooling water pipe C, and a shell A
The steam that has flowed into the inside and the cold water that flows inside the coil tube 31 are heat-exchanged to condense the steam.

The evaporator 3 is used in buildings, supermarkets,
Condensed water that is composed of a coil tube 32 that circulates the used water through a circulation pipe D to a fan coil unit (not shown) that cools the inside of a convenience store or the like, and is condensed in the condenser 2 and then decompressed in the throttle portion 33. And the utilization water (warm water) flowing in the coil tube 32 are heat-exchanged to evaporate the condensed water.

The absorber 4 converts the absorbing liquid (concentrated solution) into the evaporator 3
The vaporized water vapor is absorbed by the vaporized water vapor, and absorption heat is generated when the vaporized water vapor is absorbed. Therefore, heat is removed by cold water flowing in the coil tube 34 connected to the upstream side of the coil tube 31 via the cooling water pipe C. I am trying.

Inside the shell A, a storage tray 35 for storing the condensed water condensed in the condenser 2, a partition plate 36 for partitioning the evaporator 3 and the absorber 4 and an upper portion of the partition plate 36 are connected. A mesh plate 37 is provided.

As shown in FIG. 2, the high temperature generator 6 is an engine of high temperature (for example, 500 ° C.) that flows into the exhaust liquid pipes 16 of the exhaust pipe 14 and the absorbing liquid (diluted solution) that has flowed inside. Exhaust gas is generated from the absorbing liquid by exchanging heat with the exhaust gas.

As shown in FIG. 2, the intermediate temperature generator 7 is an intermediate temperature engine (for example, 250 ° C.) that flows through the absorbing liquid (diluted solution) and the exhaust pipes 17 of the exhaust pipe 14 as shown in FIG. Exhaust gas is generated from the absorbing liquid by exchanging heat with the exhaust gas. In addition, as shown in FIG. 3, the intermediate temperature generator 7 includes a plurality of water vapor flow path pipes 38 and the absorbing liquid (dilute solution) flowing therein.
Heat is exchanged with water vapor flowing inside to generate water vapor from the absorbing liquid.

At the upstream and downstream ends of the plurality of steam flow passage pipes 38, an upstream header 39 for distributing steam to the plurality of steam flow passage pipes 38, and condensed water from the plurality of steam flow passage pipes 38 are collected. The downstream header 40 is connected. A communication pipe 41 for communicating with the inside of the high temperature generator 6 is connected to the upstream header 39.

The exhaust cooling water heat exchanger 8 is the cooling water heater of the present invention, and as shown in FIG. 2, the engine cooling water flowing into the inside and a plurality of exhaust passage pipes 18 of the exhaust pipe 14. The engine cooling water is heated by exchanging heat with the low-temperature (for example, 160 ° C.) engine exhaust flowing inside.

As shown in FIG. 2, the low temperature generator 9 includes the absorbing liquid (diluted solution) flowing in and a plurality of cooling water flow pipes 2.
Heat is exchanged with the engine cooling water flowing through the inside of 7 to generate steam from the absorbing liquid. Further, as shown in FIG. 3, the low-temperature generator 9 heat-exchanges the absorbing liquid (diluted solution) that has flowed inside and the steam flowing in the plurality of steam flow path tubes 42 to generate steam from the absorbing liquid. Let

At the upstream and downstream ends of the plurality of steam flow passage pipes 42, an upstream header 43 for distributing steam to the plurality of steam flow passage pipes 42, and condensed water is collected from the plurality of steam flow passage pipes 42. The downstream header 44 is connected. A communication pipe 45 for communicating with the inside of the intermediate temperature generator 7 is connected to the upstream header 44.

The generator-integrated unit B is separately provided for the shell A, and the internal pressure is increased by heating the absorbing liquid in each of the generators 6, 7, and 9 to generate steam, so that the pressure-resistant container. Has been converted.

[Operation of Embodiment] Next, the operation of the engine exhaust heat recovery and absorption type chiller-heater 1 of this embodiment will be described with reference to FIGS.
A brief description will be given based on. Here, FIG. 2 is a diagram showing a flow of engine exhaust and engine cooling water in the generator-integrated unit B, and FIG. 2 is a diagram showing a flow of water vapor in the generator-integrated unit B.

The engine exhaust generated by operating the engine E flows into the high temperature generator 6 and passes through the upstream header 21 → a plurality of exhaust flow passage pipes 16 → downstream header 24 to the outside of the high temperature generator 6. Outflow to. Then, the engine exhaust flowing out of the high temperature generator 6 flows into the intermediate temperature generator 7 through the connecting pipe 19, passes through the upstream header 22 → a plurality of exhaust flow passage pipes 17 → the downstream header 25, and reaches the intermediate temperature. It flows out of the generator 7. Then, the engine exhaust flowing out of the intermediate temperature generator 7 flows into the exhaust cooling water heat exchanger 8 through the connecting pipe 20 and reaches the upstream header 23 → a plurality of exhaust flow passage pipes 18 →
It is discharged to the atmosphere through the downstream header 26.

On the other hand, the engine cooling water warmed in the water jacket of the engine E flows into the exhaust cooling water heat exchanger 8 through the cooling water pipe 15 and flows in the plurality of exhaust passage pipes 18 at an intermediate temperature. After exchanging heat with the engine exhaust and raising the temperature, it flows out of the exhaust cooling water heat exchanger 8. At this time,
The heat of the engine exhaust is taken by the engine cooling water, so that the exhaust temperature becomes extremely low (for example, 90 ° C.).

The engine cooling water flowing out of the exhaust cooling water heat exchanger 8 is connected to the low temperature generator 9 via the connecting pipe 28.
Inflowing into the upstream side header 29 → a plurality of cooling water flow path pipes 2
7 → Outflows to the outside of the low temperature generator 9 through the downstream side header 30 and returns to the inside of the water jacket of the engine E.

The dilute solution remaining in the shell A is
It flows into the high temperature generator 6, the intermediate temperature generator 7, and the low temperature generator 9 through the dilute solution pipe 13. The rare solution flowing into the high temperature generator 6 from the inside of the shell A is heat-exchanged with high temperature (for example, 500 ° C.) engine exhaust flowing in the plurality of exhaust flow passage pipes 16 to be heated to generate water vapor. At this time, the heat of the engine exhaust is deprived of heat by the dilute solution, so that the exhaust temperature becomes a medium temperature (for example, 250 ° C.).

The steam generated in the high temperature generator 6 flows from the ceiling of the high temperature generator 6 into the intermediate temperature generator 7 and is connected to the communication pipe 41 → upstream side header 39 → a plurality of steam flow passage pipes 3
8 → Outflow to the outside of the intermediate temperature generator 7 through the downstream header 40. Thus, the steam generated in the high temperature generator 6 is
When passing through the plurality of water vapor flow path pipes 38, the dilute solution in the intermediate temperature generator 7 is heated to increase the amount of vapor generated from the dilute solution in the intermediate temperature generator 7 and self-condenses (provides latent heat. ). Then, the condensed water flowing out of the intermediate temperature generator 7 is sent to the condenser 2 in the shell A through the condensed water pipe 10.

The steam sent to the condenser 2 is dispersed on the coil tube 31 and gives heat to the cold water cooled by the cooling tower to be condensed and liquefied to become condensed water. This condensed water is stored on the storage tray 35 in the shell A, atomized by the throttle portion 33, sprayed on the coil tube 32 by the evaporator 3, and heat is taken from the utilization water flowing in the coil tube 32. Vaporize to vapor. Here, since the water used lowers the temperature of the condensed water because it gives heat to the condensed water, the room is cooled by circulating the water used to the fan coil unit.

On the other hand, the absorption liquid remaining in the high temperature generator 6 becomes a concentrated solution because the water content in the lithium bromide aqueous solution decreases, and is returned to the shell A through the concentrated solution pipe 12. Then, the concentrated solution returned into the shell A is sprayed by the absorber 4, absorbs the water vapor generated in the evaporator 3 and remains as a diluted solution in the shell A, and moves to the next cycle.

The dilute solution flowing from the shell A into the intermediate temperature generator 7 is heated by exchanging heat with the high-temperature (for example, 250 ° C.) engine exhaust flowing in the plurality of exhaust passage pipes 17 to generate steam. Occur. At this time, the exhaust gas temperature is low (for example, 1
60 ° C.).

The steam generated in the intermediate temperature generator 7 flows from the ceiling of the intermediate temperature generator 7 into the low temperature generator 9 through the communication pipe 45, and the upstream header 43 → the plurality of steam flow passage pipes 42. → It flows out of the low temperature generator 9 through the downstream header 44. As described above, the steam generated in the intermediate temperature generator 7 heats the dilute solution in the low temperature generator 9 when passing through the plurality of steam flow pipes 42 to vaporize the dilute solution in the low temperature generator 9. The self-condenses by increasing the generation amount. Then, the condensed water and steam flowing out of the low temperature generator 9 are sent to the condenser 2 in the shell A through the condensed water pipe 10 and act in the same manner.

Further, the dilute solution flowing from the shell A into the low temperature generator 9 is heated by exchanging heat with the high temperature engine cooling water flowing in the plurality of cooling water passage pipes 27 to generate steam. The steam generated in the low temperature generator 9 flows out of the low temperature generator 9 from the ceiling of the low temperature generator 9,
It is sent to the condenser 2 in the shell A through the condensed water pipe 11 and operates in the same manner.

The above engine exhaust heat recovery absorption type chiller / heater 1
Table 1 below shows the transfer of heat in.

[Table 1]

[Effects of the Embodiment] As described above, the engine exhaust heat recovery and absorption chiller-heater 1 heats the engine exhaust heat, which is a high-temperature heating source, to the high temperature generator 6, the intermediate temperature generator 7, and the low temperature generator. By absorbing heat in three temperature zones of 9, the triple effect absorption cycle can be established.

Further, the engine exhaust heat recovery and absorption type chiller-heater 1 collects the thermal energy of the engine E, which has a high utilization efficiency of about 500 ° C., by the high temperature generator 6, and the engine with a low utilization efficiency of 160 ° C. Since the heat energy of E is given to the engine cooling water and recovered by the low-temperature generator 9, it is possible to effectively use the high-temperature engine exhaust gas to the low-temperature engine exhaust gas in three stages to achieve the conventional dual Energy efficiency can be remarkably improved as compared with the effect absorption refrigerator 200.

The high temperature generator 6 and the intermediate temperature generator 7
Since the steam generated in step 1 heats the dilute solution in the medium temperature generator 7 and the low temperature generator 9, respectively, the amount of steam generated is compared with that in the case where the dilute solution is heated only by the engine exhaust and engine cooling water. Can be increased.

Further, since the high temperature generator 6, the intermediate temperature generator 7, the exhaust cooling water heat exchanger 8 and the low temperature generator 9 are integrated, a generator is added to the conventional double effect absorption refrigerator 200. Compared to the above, the size can be reduced and the arrangement of devices can be simplified.

Further, since the generator-integrated unit B is installed outside the shell A and the generator-integrated unit B is made into a pressure resistant container, the condenser 2, the evaporator 3 and the absorber 4 are accommodated. It is not necessary to make the shell A into a pressure resistant container, and the cost can be reduced.

[Modification] In this embodiment, the absorber 4 is provided with the coil tube 34 for removing the absorption heat generated when absorbing the water vapor in the concentrated solution, but in order to remove the absorption heat. It is not necessary to install the coil tube 34.
In this embodiment, an aqueous lithium bromide solution was used as the absorbing liquid, but another aqueous solution may be used as the absorbing liquid.

Further, by connecting the coil tube 32 of the condenser 2 and the fan coil unit, the cold water flowing in the coil tube 32 takes heat from the steam and the water temperature rises to become hot water. By doing so, the room can be heated. On the cycle of the engine exhaust heat recovery absorption type chiller-heater 1 of this embodiment, a flow rate adjusting means such as a pump and a valve device for adjusting the flow rate of the absorbing solution is installed especially in the concentrated solution pipe 12 and the dilute solution pipe 13. May be. Further, a flow rate adjusting means such as a pump or a valve device for adjusting a flow rate inside the condensed water pipes 10 and 11 in which condensed water and steam flowing out from the low temperature generator 6, the intermediate temperature generator 7, and the high temperature generator 9 flow. May be installed.

[0054]

As described above, according to the present invention, the high temperature engine exhaust to the low temperature engine exhaust can be effectively recovered in three stages, so that the energy efficiency can be improved. Further, since the generator-integrated unit is installed outside the shell, the cost can be reduced without using the shell as a pressure resistant container. Furthermore, since the high temperature generator, the intermediate temperature generator and the low temperature generator are integrated, the structure of the device can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

2 is a perspective view showing the generator-integrated unit of FIG. 1. FIG.

FIG. 3 is a perspective view showing the generator-integrated unit of FIG. 1.

FIG. 4 is a schematic diagram showing a conventional single-effect absorption refrigerator.

FIG. 5 is a schematic view showing a conventional double-effect absorption refrigerator.

[Explanation of symbols]

 A Shell B Generator integrated unit E Engine 1 Engine exhaust heat recovery absorption / cooling water heater 2 Condenser 3 Evaporator 4 Absorber 6 High temperature generator 7 Medium temperature generator 8 Exhaust cooling water heat exchanger (cooling water heater) 9 Low-temperature generator 10 Condensed water pipe (condensed water channel) 11 Condensed water pipe (condensed water channel) 12 Concentrated solution pipe (concentrated solution channel) 13 Dilute solution pipe (diluted solution channel) 14 Exhaust pipe

Claims (1)

[Claims] 1. A condenser for condensing steam by heat exchange between steam and cold water flowing into the inside of the condenser, wherein condensed water and hot water produced by the condenser are heat-exchanged to evaporate the condensed water. An evaporator and a shell inside which contains an absorber for absorbing the water vapor produced by this evaporator into a concentrated solution; and (b) a shell provided separately for this shell, which exchanges heat between the hot engine exhaust and the aqueous solution. A high temperature generator for generating steam from the aqueous solution by heating the steam generated by the high temperature generator and the medium temperature engine exhaust heat deprived of heat by the high temperature generator and the aqueous solution to generate steam from the aqueous solution. A generator, a cooling water heater that heats the engine cooling water by exchanging heat between the engine exhaust water that has been deprived of heat by the intermediate temperature generator, and the steam generated by the intermediate temperature generator; A generator-integrated unit in which a low-temperature generator that heat-exchanges engine cooling water heated by the cooling-water heater with an aqueous solution to generate steam from the aqueous solution is integrated; (c) the high-temperature generator; A condensed water flow path for sending condensed water and steam generated in the generator and the low temperature generator to the condenser in the shell; and (d) remaining in each of the high temperature generator, the intermediate temperature generator and the low temperature generator. A concentrated solution flow path for sending the concentrated solution to the absorber in the shell; and (e) a dilute solution made in the absorber in the shell for the high temperature generator, the intermediate temperature generator and the low temperature generator. An engine exhaust heat recovery absorption type chiller-heater equipped with a dilute solution flow path that divides into each.