JP4566919B2 - Double-effect absorption chill generation / output device - Google Patents

Description

  The present invention relates to a double-effect absorption-type cold heat generation / output device, and in particular, a volatile secondary refrigerant cold-heat output method, an evaporator, a combined use of a falling liquid film type regenerator and a falling liquid film type regenerative condenser, or a single use. Thus, the present invention relates to a new improvement for improving the coefficient of performance and simplifying the apparatus.

Conventional general-purpose lithium / hydrogen double-effect absorption refrigerators are classified into those that apply series, parallel and reverse flow, depending on the regeneration method of the absorption liquid, and further, two-stage absorption, evaporation cycle application, regenerator part, absorption Different types of heat exchangers in the evaporator and evaporator sections, and different types depending on the application of different heat exchange methods and the configuration and arrangement of different heat exchangers.
In addition, any type of double-effect absorption chiller employs an output system for generating cold heat using circulating chilled water in the evaporator section, that is, such an evaporator is a refrigerant for generating and outputting cold heat. It is a heat exchanger for circulating cold water. Here, the output method of generating cold heat by circulating cold water is to cool the circulating cold water flowing into the evaporator heat transfer tube by the generated cold heat due to the evaporation heat absorption of the refrigerant liquid sprayed on the outer wall surface of the evaporator heat transfer tube. In this way, the circulating cold water whose temperature has been lowered is sent to the air conditioner by the circulating cold water pump, where the air for air conditioning is cooled to produce a cold output. That is, the output of the generated cold heat in the evaporator is made by utilizing the sensible heat change of the circulating cold water that cools the circulating cold water and thereby cools the air.
In general, a pool heating method in which a heat transfer tube is arranged horizontally is adopted for a low temperature regenerator or a high temperature regenerator.

FIG. 9 shows a configuration example of a volatile secondary refrigerant cold heat generation / output device that has been invented so far by the present inventor, although patent documents and the like are not particularly shown.
The illustrated volatile secondary refrigerant cold heat generating / outputting device 500 disperses the refrigerant condensate from the condenser (not shown) on the outer wall surface of the heat transfer tube of the evaporator 501, and the evaporator 501 generates cold heat generated by the evaporation heat absorption. Volatile secondary refrigerant vapor flowing inside the heat transfer tube is condensed, and then such volatile secondary refrigerant condensate is once accumulated in the receiver 6 and then stored in the air conditioner 7 by the volatile secondary refrigerant liquid pump 503. The air passing through the air conditioner 7 is cooled by the evaporation heat absorption, and a cold output is obtained.
As the volatile secondary refrigerant for cold output, HFE refrigerant, hydrocarbon refrigerant, alternative chlorofluorocarbon refrigerant, ammonia, carbon dioxide, or the like can be applied.

FIG. 10 shows a configuration example of an evaporator 600 for volatile secondary refrigerant cold output that has been invented so far.
The illustrated evaporator heat transfer tube is composed of a plate tube heat transfer tube 601 in which a plate portion thinner than the outer diameter of the heat transfer tube is provided between the heat transfer tubes, and the in-pipe fluid initial distributor 602 in FIG. The secondary refrigerant fluid (steam) is distributed into the plurality of tube tubes of each of the plurality of plate tube heat transfer tubes 601.
The in-pipe fluid sub-distributor 603 in FIG. 10 has a function of mixing steam or two-phase fluid of steam and fluid from a plurality of in-pipe channels of an upstream plate tube (not shown) and distributing it to a plurality of parallel channels in the downstream plate tube. Is provided.
Further, the extra-liquid sub-distributor 604 has a function of receiving the liquid fluid flowing down along the outer wall surface of the plate tube and then re-spraying it on the outer wall surface of the downstream side plate tube.
The outlet header 605 in FIG. 10 collects and extracts the in-tube fluid from the plurality of plate tubes.
Therefore, the heat exchanger shown in FIG. 10 is a compact heat composed of the above-described in-pipe fluid initial distributor 602, in-pipe fluid sub-distributor 603, extra-tube liquid sub-distributor 604, outlet header 605 and plate tube heat transfer tube 601. It is an exchanger.
FIG. 11 shows a configuration example of an air conditioner heat exchanger 700 included in a volatile secondary refrigerant cold output device applied to the absorption cold heat generator invented by the present inventors so far. The air conditioner heat exchanger 700 shown in the figure flows the volatile secondary refrigerant liquid 703 in the heat transfer tube 702, flows the air-conditioning air to the flow path between the plate fins 701 outside the tube, and uses the volatile secondary refrigerant for air-conditioning. It is a three-layer panel type compact heat exchanger for cooling air.

Conventional double-effect absorption refrigerators have the following problems.
(1) Since the circulating chilled water cooling output uses the sensible heat of the circulating chilled water, the lowest possible cold heat generation temperature, for example, 5 ° C. is required in the evaporator section. Therefore, generally, the concentration of the diluted absorbent and the regenerated absorbent is set in the range of 58 to 64 wt%. When the cold heat generation temperature is low and the concentration of the regenerated absorbent is high, a crystal phenomenon occurs due to a local temperature drop at the absorbent outlet or the absorbent return pipe downstream of the low-temperature solution heat exchanger when it is first returned to the absorber. It is easy and driving trouble may be caused by this.
(2) When the setting of the generated cold heat temperature in the evaporator section is low, the absorption liquid regeneration operation temperature in the regenerator section or the high temperature regenerator becomes high, and the required heat source fluid can be used to a lower temperature or lower quality. There is no primary energy utilization efficiency.
(3) Because the local heat transfer coefficient on the circulating cold water side in the evaporator section is relatively low, the required evaporator heat transfer area or heat exchanger size is large, and there are many necessary materials.
(4) Since the circulating cold water side local heat transfer coefficient in the air conditioner section is relatively low and the air side local heat transfer coefficient is low, it is difficult to make the heat exchanger compact, and there are many necessary materials.
(5) Since the amount of circulating chilled water is large, the required circulating chilled water pump power or electric power is large.
(6) There are many materials for circulating chilled water equipment.
(7) Periodic cleaning of dirt in the evaporator heat exchanger tube with makeup water is necessary.
(8) The absorption pool side local heat transfer coefficient in the regenerator is low, and the local heat transfer coefficient in the pipe is often inferior due to the flow of the condensed refrigerant liquid in the heat transfer pipe. It seems that there are many.

The double-effect absorption-type cold generator / output device according to the present invention comprises at least a low-temperature regenerator, a high-temperature regenerator, a condenser, an absorber and an evaporator for volatile secondary refrigerant cold-heat output, and regenerates the absorbing liquid. The low-temperature regenerator and the high-temperature regenerator are used to supply the generated refrigerant vapor from the high-temperature regenerator to the low-temperature regenerator and use it as a heat source for absorbing liquid regeneration there, and the generated refrigerant vapor from the low-temperature regenerator is The condenser is flushed and condensed into a refrigerant liquid by cooling water, and the refrigerant condensate generated by heating the absorption liquid with the refrigerant vapor in the low-temperature regenerator is heat-exchanged with the rare absorption liquid or the regenerated absorption liquid to be heated. Regardless of whether the condenser is flushed after recovery or whether the condenser is flushed immediately thereafter, the generated refrigerant vapor is condensed with cooling water, and the condensation is performed. The refrigerant condensate is supplied into the evaporator through a U-tube due to a pressure difference, and the refrigerant liquid in the refrigerant liquid storage chamber at the bottom of the evaporator is circulated by the circulation refrigerant liquid pump. And the refrigerant condensate from the condenser are sprayed on the outer wall surface of the heat transfer tube of the evaporator, and the volatile secondary refrigerant vapor that enters the heat transfer tube of the evaporator is condensed by the cold heat generated by the evaporation heat absorption. The obtained volatile secondary refrigerant liquid is allowed to flow into the receiver and is temporarily stored. Then, the volatile secondary refrigerant liquid is sent to a volatile secondary refrigerant / air heat exchanger (hereinafter referred to as an air conditioner) by a volatile secondary refrigerant liquid pump, and blown there. The cooling air is cooled and the cooling output is made. In the absorber, the diluted absorbent from the diluted absorbent storage chamber at the bottom of the absorber is circulated by the circulating diluted absorbent pump, and the low temperature solution heat exchanger is exited. Heat exchanger tube of the absorber together with regenerated absorbent While flowing down sprayed on the wall absorbs the generated refrigerant vapor from the evaporator, the double effect absorption cold energy is configured to be removed by the cooling water flowing the absorption heat of the heat transfer tube of the absorber in generating and outputting equipment, the refrigerant condensate hot occurrence refrigerant vapor generated by using the playback is supplied to the low-temperature regenerator absorbing solution from the high temperature generator, near the dilute absorbent liquid outlet of the low-temperature solution heat exchanger using said re-preheating the dilute absorbent solution, wherein exiting the low-temperature solution heat exchanger from the low-temperature regenerator in a dilute absorbent solution / refrigerant liquid heat exchanger provided in a configuration heat recovery is carried out, also, at least It is composed of a low temperature regenerator, a high temperature regenerator, a condenser, an absorber and an evaporator for volatile secondary refrigerant cold output, and the absorption liquid is regenerated by the low temperature regenerator and the high temperature regenerator. Supply generated refrigerant vapor to the low-temperature regenerator Then, the refrigerant vapor generated from the low-temperature regenerator is flushed to the condenser and condensed into a refrigerant liquid by cooling water. Regardless of whether the refrigerant condensate produced by heating is heat-recovered by exchanging heat with the dilute absorbent or the regeneration-needed absorbent, and then the condenser is flushed or immediately after the condenser is flushed. However, the generated refrigerant vapor is condensed by cooling water, and the refrigerant condensate in the condenser is supplied into the evaporator through a U-shaped pipe due to a pressure difference, and the circulating refrigerant liquid pump The refrigerant liquid in the refrigerant liquid storage chamber is circulated, and both the circulating refrigerant liquid and the refrigerant condensate from the condenser are sprayed on the outer wall surface of the heat transfer tube of the evaporator, and the generated cold heat due to the evaporation heat absorption. Therefore, the volatile secondary refrigerant liquid obtained by condensing the volatile secondary refrigerant vapor that enters the heat transfer tube of the evaporator flows into the receiver and is temporarily stored, and then volatile by the volatile secondary refrigerant liquid pump. The refrigerant is sent to a secondary refrigerant / air heat exchanger (hereinafter referred to as an air conditioner), where the air-conditioning air blown there is cooled to produce a cold output. Circulating dilute absorbent from the dilute absorbent storage chamber and generating refrigerant vapor from the evaporator while spraying and flowing down the outer wall surface of the heat transfer tube of the absorber together with the regenerated absorbent exiting the low temperature solution heat exchanger absorb, in the double effect absorption cold generating and output equipment for the absorption heat and the structure is removed by cooling water flowing to the heat transfer tube of the absorber at that time, a dilute absorbent solution / refrigerant liquid heat exchanger Near the low-temperature solution heat exchanger. Installed in the diversion flow path of the collected liquid, and in the case of series flow, dilute absorption liquid sent from the dilute absorption liquid storage chamber at the bottom of the absorber is diverted by the dilute absorption liquid pump, and the main dilute absorption liquid is converted into low-temperature solution heat. It is sent to the exchanger and preheated with the regenerated absorbent from the low temperature regenerator, and in the case of reverse flow, the mainstream dilute absorbent is preheated with the regenerated absorbent through the high temperature solution heat exchanger from the high temperature regenerator. In the case of flow, preheat the mainstream diluted absorbent in the low-temperature solution heat exchanger with the combined absorbent of the regenerated absorbent from the low-temperature regenerator and the regenerated absorbent from the high-temperature regenerator through the high-temperature solution heat exchanger. And then supply to the high temperature regenerator via the low temperature regenerator and the high temperature solution heat exchanger, respectively, or after diversion, the low temperature regenerator and the high temperature regeneration via the low temperature solution heat exchanger and the high temperature solution heat exchanger, respectively. Whether or not to supply Regardless, in either case, the tributary dilute absorbent is sent to the dilute absorbent / refrigerant liquid heat exchanger where it is preheated by the refrigerant condensate from the low temperature regenerator and the dilute absorbent / refrigerant liquid heat The configuration is such that the tributary dilute absorbent exiting the exchanger is merged with the main dilute absorbent exiting the low temperature solution heat exchanger, and a fuel gas or fuel oil direct regenerator is applied to the high temperature regenerator. In addition, the low temperature regenerator is configured to apply a falling liquid film type regenerative condenser or a pool heating type regenerator, and the low temperature regenerator applies a falling liquid film type regenerator to the high temperature regenerator so that a heat source without phase change is applied. Fluid or exhaust heat is used as a heat source for the high temperature regenerator, and a falling liquid film type regenerative condenser or a pool heating type regenerator is applied to the low temperature regenerator, and the falling liquid film type regenerative condensation is applied to the high temperature regenerator. A heat source fluid or hot water with phase change The air as a heat source of the high-temperature regenerator, a structure for applying falling film reproducing condenser or pool heating system regenerator to the low temperature generator.

Since the double effect absorption-type cold generation / output device according to the present invention is configured as described above, the following effects can be obtained.
(1) Since the volatile secondary refrigerant cold output system uses the latent heat of the circulating volatile secondary refrigerant to generate cold output, the temperature change due to the pressure loss of the circulating volatile secondary refrigerant can be kept small. It can design and can set the cold generation temperature of an evaporator part high by this at the time of cold output.
(2) Since the evaporator cold generating temperature can be set high, the concentration of the regenerated absorbent can be set low under the condition that the absorber absorption operation temperature is constant due to the vapor-liquid equilibrium relationship between the refrigerant vapor and the absorbent. Thus, the absorption liquid regeneration operation temperature of the regenerator unit or the high temperature regenerator unit can be set low, the heat source fluid can be used at a lower temperature or lower quality, and the heat energy utilization efficiency of the heat source can be improved.
(3) Since the concentration of the regenerated absorbent solution can be set low, the possibility of occurrence of operational troubles due to the crystal phenomenon of the absorbent solution is reduced or eliminated.
(4) The evaporator and the air conditioner can be made compact, the required heat exchanger size can be reduced, and materials can be saved.
(5) Instead of the relatively large circulating chilled water power at the time of circulating chilled water cold heat output, the required circulating secondary refrigerant power is extremely small and the energy saving effect is remarkable.
(6) No circulating chilled water device or expansion tank is required.
(7) Periodic cleaning of the evaporator heat exchanger heat transfer tube is not necessary.
In other words, since the cooling output is made by using the condensation and latent heat of evaporation of the volatile secondary refrigerant, the temperature of the evaporator can be set to a reasonably high temperature, thereby reducing the maximum regeneration temperature and improving the coefficient of performance. Is planned.
In addition, since the maximum regeneration temperature is lowered, the heat source fluid can be used at a lower temperature or lower quality, and the heat energy utilization efficiency of the heat source can be improved. In addition, the evaporator and the air conditioner can be made compact, the overall size of the apparatus can be reduced, and materials can be saved. Further, the required circulating secondary refrigerant power is extremely small, and the energy saving effect is remarkable. Furthermore, there is no need for a circulating chilled water device or an expansion tank, which eliminates the need for periodic cleaning in the evaporator heat exchanger heat transfer tubes.

  The present invention aims to improve the coefficient of performance and simplify the apparatus by using a volatile secondary refrigerant cold output system, an evaporator, a falling liquid film type regenerator and a falling liquid film type regenerative condenser in combination or single use. An object of the present invention is to provide a double-effect absorption-type cold heat generation / output device.

Hereinafter, preferred embodiments of a double-effect absorption-type cold heat generation / output device according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
The present invention is the above-described conventional invention of the present inventor, in particular, a double effect absorption-type cold generation / output device constructed using the volatile secondary refrigerant cold-power output evaporator 500. This will be described in detail as follows.
Figure 1 shows the series reproduction flow of the intake Osamueki, volatile secondary refrigerant cold output method, an example of the structure of the evaporator and the falling film reproducing condenser double effect absorption cold generating method for applying the device. Here, a fuel gas or fuel oil direct regenerator is applied to the high temperature regenerator 2, and a falling liquid film type regenerative condenser is applied to the low temperature regenerator 1, and the condenser 3, the absorber 4 and the volatile secondary are used. The evaporator 5 for refrigerant cooling / heating output is housed and configured in the same body 12.

Cold generation and output by the double effect absorption type cold generator shown in FIG. 1 is performed as follows.
That is, the diluted absorbent 4g sent from the absorber 4 by the diluted absorbent pump 4d is used as the falling liquid film regenerative condenser 200 of the low temperature regenerator 1 in FIG. 8 in the low temperature solution heat exchanger 9 and the high temperature solution heat exchanger 10. From the regenerated absorbent 1c from the high temperature regenerator 2 and the absorbent 2b after the one-step regeneration from the direct regenerator of the high temperature regenerator 2, and then sequentially supplied to the direct high temperature regenerator 2 for regeneration. After the one-step regeneration from, the heat-recovered absorbent 2b is exchanged with the diluted absorbent 4g in the high-temperature solution heat exchanger 10 for heat recovery, and then supplied to the low-temperature regenerator 1 for regeneration, and the low-temperature regenerator The regenerated absorbent 1c from 1 is heat-exchanged with the diluted absorbent 4g in the low-temperature solution heat exchanger 9 to recover the heat and then returned to the absorber 4 to be used for absorbing the generated refrigerant vapor from the evaporator 5. , The absorption heat at that time by the cooling water 26 It is removed by.
Further, the generated refrigerant vapor 2 a from the direct high temperature regenerator 2 is used as a heat source for regenerating the absorbing liquid of the low temperature regenerator 1.

  In addition, the refrigerant condensate generated when the absorbing liquid is heated and regenerated in the low temperature regenerator 1 composed of the falling liquid film type regenerative condenser 200 is supplied to the condenser 3 by the valve 13 regardless of whether or not the sensible heat is recovered. And the generated refrigerant vapor and the generated refrigerant vapor from the low temperature regenerator 1 are cooled by the cooling water 26. In addition, the refrigerant liquid is supplied from the condenser 3 to the evaporator 5 and dispersed on the outer wall surface of the heat exchanger heat transfer pipe of the evaporator 5 together with the circulating refrigerant liquid 8b. Volatile secondary refrigerant vapor flowing through the The volatile secondary refrigerant condensate 5d thus formed is once stored in the volatile secondary refrigerant receiver 6 and then sent to the air conditioner 7 by the volatile secondary refrigerant liquid pump 6a, where the volatile secondary refrigerant is supplied. Cooling output is obtained by cooling the air-conditioning air by the evaporation heat absorption of the liquid 5d. At that time, the volatile secondary refrigerant vapor 5c is returned to the evaporator 5 to be condensed.

Figure 2 shows an example of the intake Osamueki reproduction parallel flows and volatile secondary refrigerant cold output format double effect absorption cold generating and outputting method and apparatus that combines the. Here, a fuel gas or fuel oil direct regenerator is applied to the high temperature regenerator 2, and a falling liquid film type regenerative condenser 200 is applied to the low temperature regenerator 1, and the condenser 3, the absorber 4 and the evaporator 5 are applied. Are housed in the same body 12.

The cold heat generation / output by the apparatus configuration shown in FIG. 2 is performed as follows.
That is, the dilute absorbent 4g sent from the absorber 4 is diverted by the dilute absorbent pump 4d, and the falling liquid film regenerative condenser 200 of the low temperature regenerator 1 in the low temperature solution heat exchanger 9 and the high temperature solution heat exchanger 10, respectively. Is supplied to the low temperature regenerator 1 and the high temperature regenerator 2 after being preheated with the regenerated absorbent 1c from the high temperature regenerator 2 and the regenerated absorbent 2b from the direct regenerator of the high temperature regenerator 2 or as shown in FIG. In the same manner, the diluted absorbent 4g is passed through the regenerated absorbent 1c from the low temperature regenerator 1 and the regenerated absorbent 2b through the high temperature solution heat exchanger 10 from the high temperature regenerator 2 in the low temperature solution heat exchanger 9. Heat-exchanged with the combined absorption liquid of the pre-heated and diverted, a part is supplied to the falling-film regenerator 100 of the low-temperature regenerator 1 and regenerated, and a part is regenerated by the high-temperature solution heat exchanger 10 After preheating, the high temperature regenerator 2 Play is supplied to the raw device.
Further, the regenerated absorption liquid thus obtained is returned to the absorber 4 and used for absorbing the generated refrigerant vapor from the evaporator 5, and the heat absorbed at that time is removed by the cooling water 26.
Further, the generated refrigerant vapor 2a from the high temperature regenerator 2 is used as a heat source for regenerating the absorbing liquid of the falling film type low temperature regenerator 1.
Further, the volatile secondary refrigerant output method of the evaporator 3 is the same as that of the case of the double effect absorption chill generation / output device to which the series flow described above is applied, and thus the description thereof is omitted.
2 and 3, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

Figure 4 shows an example of a reverse flow and volatile secondary refrigerant cold output method and the double effect absorption cold generating and output method combining apparatus of the intake Osamueki playback. Here, a fuel gas or fuel oil direct regeneration regenerator is applied to the high temperature regenerator 2, and a falling liquid film regenerative condenser 200 is applied to the low temperature regenerator 1, and the condenser 3, the absorber 4 and the evaporator 5 are applied. Are housed in the same body 12.

The generation and output of cold by the apparatus configuration shown in FIG. 4 is performed as follows.
That is, the diluted absorbent 4g sent from the absorber 4 by the diluted absorbent pump 4d is sent from the direct regenerator of the high temperature regenerator 2 in the low temperature solution heat exchanger 9, and after regeneration through the high temperature solution heat exchanger 10. After heat-exchanging with the absorbing liquid 2b and preheating, it is supplied to the falling liquid film type regeneration condenser 200 of the low temperature regenerator 1 for regeneration. Further, the one-step regenerated absorbent 1c sent from the falling film regenerative condenser 200 of the low temperature regenerator 1 by the absorbent liquid pump 11 connected to the low temperature regenerator 1 is converted into the high temperature regenerator in the high temperature solution heat exchanger 10. Heat is exchanged with the regenerated absorbent 2b from No. 2 direct regenerator and preheated, and then supplied to the direct regenerator for regeneration. In this way, the regenerated absorption liquid from the direct regenerator is sequentially recovered through the high temperature solution heat exchanger 10 and the low temperature solution heat exchanger 9, and then returned to the absorber 4 to be generated from the evaporator section. Used for absorbing the refrigerant vapor, the absorbed heat at that time is removed by the cooling water 26.

The generated refrigerant vapor 2 a from the high temperature regenerator 2 is used as a heat source for regenerating the absorbing liquid of the low temperature regenerator 1 including the falling liquid film type regenerator 100.
Further, the volatile secondary refrigerant output method of the evaporator 3 is the same as that of the case of the double effect absorption chill generation / output device to which the series flow described above is applied, and thus the description thereof is omitted.
In the configuration of FIG. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

Figure 5 is a double effect absorption cold generating apparatus series playback flow and volatile secondary refrigerant cold output method applied to an example, a method and apparatus for heat recovery is made from the refrigerant condensate according to billed to claim 1 Is described. However, the falling film type regenerative condenser 200 shown in FIG. 8 is applied to the high temperature regenerator 2 here.

  4 g of the diluted absorbent sent from the absorber 4 is distributed on the inner wall surface of the heat transfer tube of the falling liquid film type regenerative condenser 200 and flows down in the form of a film, and this falling absorption liquid film is heated outside the tube. It is regenerated by heating with a high-temperature steam 2d from a heat source fluid or boiler having a phase change introduced into the boiler. Here, the dilute absorbent from the absorber 4 is preheated by the one-step regenerated absorbent 1c from the low temperature regenerator 1 in the low temperature solution heat exchanger 9, and then sent to the dilute absorbent / refrigerant liquid heat exchanger 9a. Therefore, the refrigerant condensate 1b from the low temperature regenerator 1 is re-preheated and then supplied to the low temperature regenerator 1 for regeneration. In FIG. 5, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

6 by a double effect absorption cold generating apparatus series playback flow and volatile secondary refrigerant cold output method applied to an example, a method and apparatus for heat recovery from the refrigerant condensate according to billed to claim 2 Explain. However, the falling film type regenerator 100 shown in FIG. 7 is applied to the high temperature regenerator 2 here.
4 g of the diluted absorbent sent from the absorber 4 is distributed on the inner wall surface of the owned heat transfer pipe of the falling liquid film regenerator 100 and flows down into a film shape, and such falling absorbent liquid film is transferred to the outside heating chamber. It is regenerated by being heated by the heat source fluid having no phase change introduced or the exhaust heat 2c.

Heat recovery from the refrigerant condensate of the low-temperature regenerator 1 is performed as follows.
That is, the dilute absorbent 4g from the absorber 4 is divided to flow from the falling liquid film regenerative condenser 200 of the low temperature regenerator 1 in the low temperature solution heat exchanger 9 and the dilute absorbent / refrigerant liquid heat exchanger 9a, respectively. After one-step regeneration, heat exchange is performed between the absorption liquid 1c and the refrigerant condensate 1b, and the rare absorption liquid that has exited the rare absorption liquid / refrigerant liquid heat exchanger 9a is used as the mainstream rare absorption that has exited the low temperature solution heat exchanger 9. In this way, heat is recovered from the refrigerant condensate 1b from the low-temperature regenerator 1.

Since examples of the heat recovery from the refrigerant condensate from the low temperature regenerator 1 described it is readily seen to be applicable to the above-mentioned applying the path Rarerufuro and reverse flow double effect absorption cold generating and output device in the above The description is omitted.
In addition, it can be easily understood that the double-effect absorption refrigeration generator to which the volatile secondary refrigerant refrigeration output system of the present invention is applied can be applied to the low-temperature regenerator 1 and the high-temperature regenerator 2 using a pool heating regenerator. The description about this is also omitted. In FIG. 6, the same parts as those in FIG.

FIG. 7 illustrates the configuration of the falling film type regenerator 100 that utilizes high-temperature exhaust heat without phase change throughout the process of regenerating the absorbing solution for the regeneration of the absorbing solution.
First, as shown in FIG. 7, the falling liquid film type regeneration device 100 of the present invention includes an absorbent liquid distribution chamber 30 formed by dividing a vertical cylindrical body 40 by an upper partition plate 41 and a lower partition plate 42. A heating chamber 35 and a gas-liquid separation chamber 38 are provided.
The absorption liquid distribution chamber 30 is formed by a space between the upper portion of the body 40 and the upper partition plate 41, and is used to spray the absorption liquid introduction part 31 and the absorption liquid into the absorption liquid pool 42. 43, a falling liquid distributor 50 having a function of distributing the absorption liquid in each tube of the tube bundle 34A of the heat transfer tube 34 at an equal flow rate and distributing it in a film shape on the inner wall surface of the tube.

  Further, the heating chamber 35 is formed by a space surrounded by the upper partition plate 41, the lower partition plate 42, and the body 40, and forms a heat exchange portion between the high temperature exhaust heat that is a heat source fluid and the high temperature water and the falling absorption liquid film. The heat transfer tube 34 includes a tube bundle 34A, an exhaust heat introduction unit 36, and an exhaust heat derivation unit 32, and a plurality of baffle plates 33 are provided in a staggered manner in the external heating side flow path of the heat transfer tube 34 at a required interval. Yes. Therefore, the exhaust heat introduction part 36 and the exhaust heat derivation part 32 are provided at the lower end part and the upper end part of the heating chamber 35, respectively. Further, a gas-liquid separation chamber 38 is formed between the lower partition plate 42 and the absorbing liquid outlet 39, and a generated refrigerant vapor outlet 37 is formed.

  In the falling liquid distributor 50, the absorbing liquid is easily distributed from the absorbing liquid pool 42 to the inner wall surface of the heat transfer pipe 34 by the gap channel portion 41 and flows down. Further, since the falling liquid distributors 50 installed in the respective heat transfer tubes 34 have the same shape, the flow rate of the absorption liquids requiring regeneration distributed to the respective heat transfer tubes 34 due to the same liquid level difference is the same.

  Next, in the above-described configuration, an absorption liquid requiring regeneration in the absorption liquid distribution chamber 30, for example, a diluted absorption liquid, is sprayed from the sprayer 43 to the absorption liquid pool 42, and then the falling liquid distributor 50 causes the heat transfer tube 34 to flow. The refrigerant component is distributed on the inner wall surface of the pipe and flows down in the form of a falling liquid film, and is heated by a heat source fluid having no phase change, for example, gaseous high-temperature exhaust heat, and introduced into the heating chamber 35. Evaporates. Further, the regenerated absorption liquid exiting the bottom of the heat transfer tube 34 enters the lower absorption liquid storage chamber 51 and temporarily accumulates. In addition, the refrigerant vapor that has exited the bottom of the heat transfer tube 34 is extracted from the generated refrigerant vapor deriving unit 37 by the droplets therein being captured by the eliminator 37a.

Further, the falling liquid film type regenerative condenser 200 is configured using a heat source fluid having a phase change or high temperature steam as shown in FIG. 8, and the same parts as those in FIG. .
As shown in FIG. 8, the falling liquid film type regeneration condensing apparatus 200 of the present invention distributes the regenerative absorption liquid (or dilute absorption liquid) required on the inner wall surface of the heat transfer tube 34 and flows it down in the form of a film. A condensable heat source fluid is provided from the external flow path of the heat pipe 34 and heated through the wall of the heat transfer pipe 34, and the refrigerant in the absorbing liquid film is evaporated under a condition that is not affected by the liquid level difference. The absorption liquid film is regenerated, and basically the absorption liquid distribution chamber 30, the heating chamber 35 and the gas-liquid separation chamber 38 formed by dividing the vertical cylindrical body 40 by the upper partition plate 41 and the lower partition plate 42 are provided. It is what you have.

  The absorbing liquid distribution chamber 30 is formed by a space between the upper portion of the body 40 and the upper partition plate 41, and the absorbing liquid introducing portion 31 and the regenerating absorbing liquid required on the inner wall surface of the tube bundle 34 </ b> A of the heat transfer tube 34. A sprayer 43 for spraying, an absorption liquid pool 42, and a regeneration-required absorption liquid in the pool 42 are distributed at an equal flow rate in each tube of each heat transfer tube 34, and on each tube inner wall surface of each heat transfer tube 34. A falling liquid distributor 50 having a function of being distributed in a film form is provided. Further, the sprayer 43 is installed in the trunk 42 above the absorbent pool 42, and the absorbent introduction part 31 is provided so as to penetrate the trunk 40.

  The heating chamber 35 in the middle of the fuselage 40 is formed by a space surrounded by the fuselage 40 between the upper partition plate 41 and the lower partition plate 42, and the heat of the condensable heat source fluid for heating and the absorbing liquid film. A tube bundle 34A of heat transfer tubes 34 forming an exchange unit, a condensable heat source fluid introduction unit 60, and a condensate storage chamber 61 with a condensate outlet 61a are provided. The heat source fluid introduction part 60 and the condensate storage chamber 61 are provided on the upper end side and the lower end part of the body 40 of the heating chamber 35, respectively.

  A gas-liquid separation chamber 38 is formed below the lower partition plate 42, and an entrance prevention device 37A with an eliminator 37a and a generated refrigerant vapor deriving portion 37 are provided on the side of the gas-liquid separation chamber 38. ing.

Accordingly, after the regeneration-requiring absorbent is sprayed from the sprayer 43 of the absorbent distribution chamber 30 to the absorbent pool 42 in the absorbent distribution chamber 30, the falling wall distributor 50 causes the inner wall surface of each heat transfer tube 34 to flow. In this case, the refrigerant component flows down and is heated by the condensing heat source fluid 60a for heating introduced into the heating chamber 35, and the refrigerant component evaporates therefrom. In addition, the regenerated absorption liquid 51a exiting the bottom of the heat transfer tube 34 enters the lower absorption liquid storage chamber 51 and temporarily accumulates. Further, the refrigerant vapor exiting from the bottom of the heat transfer tube 34 enters the entrainment prevention device 37A, and the droplets held by the refrigerant vapor are captured by the eliminator 37a, and a low-temperature regenerator (not shown) downstream from the generated refrigerant vapor deriving unit 37. Section or condenser section.
Moreover, as a constituent material of the heat exchanger tube 34, a copper-type material or a cupronickel material is suitable.

  The present invention improves the coefficient of performance by using a combination of a volatile secondary refrigerant cold output system, an evaporator, a falling liquid film regenerator and a falling liquid film regenerative condenser or a single use for a double effect absorption refrigerator, and Applicable for simplicity.

It is a block diagram which shows the double effect absorption type cold heat generation and output device by this invention. It is a block diagram which shows the other form of FIG. It is a block diagram which shows the other form of FIG. It is a block diagram which shows the other form of FIG. It is a block diagram which shows the other form of FIG. It is a block diagram which shows the other form of FIG. It is a block diagram which shows the falling liquid film type | mold regenerator used for this invention. It is a block diagram which shows the falling liquid film type | mold reproduction | regeneration condenser used for this invention. It is a block diagram of the conventional volatile secondary refrigerant | coolant output device. It is a block diagram of the conventional volatile secondary refrigerant | coolant output evaporator. It is a block diagram of the conventional volatile secondary refrigerant cold output air conditioner.

1 Low temperature regenerator (applied by falling film regenerative condenser and pool heating regenerator)
1a Generated refrigerant vapor 1b from a low-temperature regenerator Refrigerant condensate 1c Absorbed liquid after one-step regeneration (reverse flow) or regenerated absorbent (series flow or parallel flow) from a low-temperature regenerator
2 High-temperature regenerator (applying direct regenerator, falling liquid film regenerator, falling liquid film regenerator, pool heating regenerator)
2a Refrigerant vapor generated from high-temperature regenerator 2b Absorbed liquid after one-step regeneration (series flow) or regenerated absorbent (reverse flow or parallel flow) from high-temperature regenerator
3 Condenser 4 Absorber 4a Circulating rare absorbent pump 4b Diluted absorbent storage chamber 4d Diluted absorbent pump 4e Circulating diluted absorbent 4f Regenerated absorbent 4g Diluted absorbent 5 Evaporator 5a for volatile secondary refrigerant cold output Circulating refrigerant liquid pump 5b Refrigerant storage chamber 5c Volatile secondary refrigerant vapor 5d Volatile secondary refrigerant condensate 6 Receiver 6a Volatile secondary refrigerant liquid pump 7 Air conditioner 8 U-shaped tube 8a Refrigerant condensate 8b from condenser Refrigerant liquid 9 Low temperature solution heat exchanger 9a Diluted absorbent / refrigerant liquid heat exchanger 10 High temperature solution heat exchanger 11 Absorbent liquid pump 12 Body 13 Valve 20 Condenser / absorber / evaporator unit device 26 Cooling water 100 Falling liquid film Regenerator 200 Flowing film regenerative condenser 31 Absorbing liquid introduction part 32 Waste heat derivation part 33 Baffle plate 34 Heat transfer tube 34A Heat transfer tube bundle 35 Heating chamber 36 Exhaust heat introduction part 37 Generated refrigerant vapor derivation part 37a Eliminator 37A Entreprevention device 38 Gas-liquid separation chamber 39 Absorbed liquid outlet 40 Body 41 Upper partition plate 41a Lower partition plate 42 Absorbed liquid pool 43 Sprinkler 50 Falling liquid distributor 51 Absorbed liquid storage chamber 51a Regenerated absorbent 60 High temperature Steam introduction unit 61a Condensate outlet unit 500 Volatile secondary refrigerant cold heat generation / output device 501 Volatile secondary refrigerant cold output evaporator 503 Volatile secondary refrigerant liquid pump 600 Volatile secondary refrigerant cold output evaporator 601 Plate tube heat transfer tube 602 In-pipe fluid initial distributor 603 In-pipe fluid sub-distributor 604 Extra-tube fluid sub-distributor 605 Outlet header 700 Air conditioner heat exchanger 701 Plate fin 702 Heat transfer tube 703 Volatile secondary refrigerant liquid

Claims (5)

It consists of at least a low-temperature regenerator (1), a high-temperature regenerator (2), a condenser (3), an absorber (4), and an evaporator (5) for volatile secondary refrigerant cold output, and regenerates the absorbing liquid. A low-temperature regenerator (1) and a high-temperature regenerator (2) are used, and the generated refrigerant vapor (2a) from the high-temperature regenerator (2) is supplied to the low-temperature regenerator (1) and the heat source for regenerating the absorbent there The generated refrigerant vapor (1a) from the low temperature regenerator (1) is flushed to the condenser (3), where it is condensed into a refrigerant liquid by cooling water (26),
In the low-temperature regenerator (1), the refrigerant condensate (1b) generated by heating the absorption liquid with the refrigerant vapor is heat-exchanged with a dilute absorption liquid or a regenerative absorption liquid to be recovered, and then the condenser (3 ) Or whether the condenser (3) is flushed immediately after, however, the refrigerant vapor generated therein is condensed with cooling water (26),
The refrigerant condensate (8a) in the condenser (3) is supplied into the evaporator (5) via a U-shaped tube (8) due to a pressure difference, and the evaporator (5a) is supplied to the evaporator (5a). 5) Circulate the refrigerant liquid in the refrigerant liquid storage chamber (5b) at the bottom, and combine the circulating refrigerant liquid (8b) and the refrigerant condensate (8a) from the condenser (3) together with the evaporator (5). Volatile secondary refrigerant obtained by condensing the volatile secondary refrigerant vapor (5c) entering the heat transfer tube of the evaporator (5) by the cold heat generated by the evaporation endotherm The liquid (5d) flows into the receiver (6) and is temporarily stored. Then, the volatile secondary refrigerant liquid pump (6a) sends the liquid (5d) to the volatile secondary refrigerant / air heat exchanger (hereinafter referred to as air conditioner) (7). The air conditioning air blown there is cooled to produce cold output,
In the absorber (4), the circulating rare absorbent pump (4a) circulates the rare absorbent (4e) from the rare absorbent reservoir (4b) at the bottom of the absorber (4), and a low-temperature solution heat exchanger ( 9) Absorbs the generated refrigerant vapor from the evaporator (5) while spraying and flowing down on the outer wall surface of the heat transfer tube of the absorber (4) together with the regenerated absorbent (2b) exiting 9), and absorbing at that time the heat absorber in the double effect absorption cold generating and output equipment that is configured to be removed by the cooling water (26) which flows through the heat transfer tube (4),
Refrigerant condensate (1b) generated by supplying high-temperature generated refrigerant vapor (2a) from the high-temperature regenerator (2) to the low-temperature regenerator (1) and used to regenerate the absorbing liquid is converted into a low-temperature solution heat exchanger ( 9) In the dilute absorbent / refrigerant liquid heat exchanger (9a) provided in the vicinity of the dilute absorbent exit of 9), the retentate of the dilute absorbent exiting the low temperature solution heat exchanger (9) from the low temperature regenerator (1) is recovered. The double-effect absorption-type cold generation / output device according to claim 1, wherein heat recovery is performed using preheating. It consists of at least a low-temperature regenerator (1), a high-temperature regenerator (2), a condenser (3), an absorber (4), and an evaporator (5) for volatile secondary refrigerant cold output, and regenerates the absorbing liquid. A low-temperature regenerator (1) and a high-temperature regenerator (2) are used, and the generated refrigerant vapor (2a) from the high-temperature regenerator (2) is supplied to the low-temperature regenerator (1) and the heat source for regenerating the absorbent there The generated refrigerant vapor (1a) from the low temperature regenerator (1) is flushed to the condenser (3), where it is condensed into a refrigerant liquid by cooling water (26),
In the low-temperature regenerator (1), the refrigerant condensate (1b) generated by heating the absorption liquid with the refrigerant vapor is heat-exchanged with a dilute absorption liquid or a regenerative absorption liquid to be recovered, and then the condenser (3 ) Or whether the condenser (3) is flushed immediately after, however, the refrigerant vapor generated therein is condensed with cooling water (26),
The refrigerant condensate (8a) in the condenser (3) is supplied into the evaporator (5) via a U-shaped tube (8) due to a pressure difference, and the evaporator (5a) is supplied to the evaporator (5a). 5) Circulate the refrigerant liquid in the refrigerant liquid storage chamber (5b) at the bottom, and combine the circulating refrigerant liquid (8b) and the refrigerant condensate (8a) from the condenser (3) together with the evaporator (5). Volatile secondary refrigerant obtained by condensing the volatile secondary refrigerant vapor (5c) entering the heat transfer tube of the evaporator (5) by the cold heat generated by the evaporation endotherm The liquid (5d) flows into the receiver (6) and is temporarily stored. Then, the volatile secondary refrigerant liquid pump (6a) sends the liquid (5d) to the volatile secondary refrigerant / air heat exchanger (hereinafter referred to as air conditioner) (7). The air conditioning air blown there is cooled to produce cold output,
In the absorber (4), the circulating rare absorbent pump (4a) circulates the rare absorbent (4e) from the rare absorbent reservoir (4b) at the bottom of the absorber (4), and a low-temperature solution heat exchanger ( 9) Absorbs the generated refrigerant vapor from the evaporator (5) while spraying and flowing down on the outer wall surface of the heat transfer tube of the absorber (4) together with the regenerated absorbent (2b) exiting 9), and absorbing at that time the heat absorber in the double effect absorption cold generating and output equipment that is configured to be removed by the cooling water (26) which flows through the heat transfer tube (4),
Install the dilute absorbent / refrigerant liquid heat exchanger (9a) in the diverted flow path of dilute absorbent (4g) near the low temperature solution heat exchanger (9),
In the case of series flow, the dilute absorption liquid sent from the dilute absorption liquid storage chamber (4b) at the bottom of the absorber (4) is diverted by the dilute absorption liquid pump (4a), and the mainstream dilute absorption liquid is subjected to low-temperature solution heat exchange. To the regenerator (9) and preheated with the regenerated absorbent (1c) from the low temperature regenerator (1),
In the case of reverse flow, the mainstream diluted absorbent is preheated by the regenerated absorbent (2b) that has passed through the high temperature solution heat exchanger (10) from the high temperature regenerator (2),
In the case of parallel flow, the mainstream dilute absorbent is passed through the regenerated absorbent (1c) from the low temperature regenerator (1) and the high temperature solution heat exchanger (10) from the high temperature regenerator in the low temperature solution heat exchanger (9). Is it preheated by the combined absorption liquid with the regenerated absorption liquid (2b) that has passed and then divided and supplied to the high temperature regenerator (2) via the low temperature regenerator (1) and the high temperature solution heat exchanger (10), respectively? Alternatively, whether it is supplied to the low temperature regenerator (1) and the high temperature regenerator (2) through the low temperature solution heat exchanger (9) and the high temperature solution heat exchanger (10) after being divided,
In any case, the tributary diluted absorbent is sent to the diluted absorbent / refrigerant liquid heat exchanger (9a), where it is preheated by the refrigerant condensate (1b) from the low temperature regenerator (1), and A dual-effect absorption system characterized by merging the tributary dilute absorbent from the absorbent / refrigerant liquid heat exchanger (9a) with the main dilute absorbent from the low temperature solution heat exchanger (9) Cold heat generation / output device. Apply a fuel gas or fuel oil direct regenerator to the high temperature regenerator (2), and apply a falling liquid film regenerative condenser (200) or a pool heating type regenerator to the low temperature regenerator (1). The double-effect absorption-type cold generation / output device according to claim 1 or 2. A falling film type regenerator (100) is applied to the high-temperature regenerator (2), and a heat source fluid or exhaust heat without phase change is used as a heat source for the high-temperature regenerator (2), and the down-flow regenerator (1) The double-effect absorption cold generation / output device according to claim 1 or 2, wherein a liquid film regenerative condenser (200) or a pool heating regenerator is applied. A falling film type regenerative condenser (200) is applied to the high temperature regenerator (2), a heat source fluid having a phase change or high temperature steam is used as a heat source of the high temperature regenerator (2), and the low temperature regenerator (1) The double effect absorption type cold generating / output device according to claim 1 or 2, wherein a falling liquid film type regenerative condenser (200) or a pool heating type regenerator is applied.

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