JP4588425B2 - Absorption heat pump - Google Patents

Description

  The present invention relates to an absorption heat pump that obtains a high-temperature heated medium using a heat source such as exhaust hot water, exhaust gas, and exhaust steam, and more particularly to an absorption heat pump that obtains a high-temperature heated medium vapor using these heating sources. is there.

An absorption heat pump that uses hot exhaust water as a heat source and generates hot water having a temperature higher than that of the exhaust heat source is known from Patent Document 1. However, since these absorption heat pumps obtain high-temperature heat as high-temperature water (sensible heat) that is a fluid to be heated, there is a problem that pump power for circulating the high-temperature water increases. Further, since these known absorption heat pumps do not heat the heated medium liquid to obtain heated medium vapor, they did not consider preheating the heated medium.
Japanese Patent Publication No.58-18574

  The present invention has been made in view of the above points, and by heating the heated medium liquid by using the exhaust warm water, exhaust gas, exhaust steam and the like as a heat source to obtain the heated medium vapor, the auxiliary machine power can be reduced and the It aims at providing the absorption heat pump which can aim at the improvement of the conversion efficiency to a vapor | steam by preheating a heating-medium liquid.

In order to achieve the above-mentioned object, the invention described in claim 1 is constituted by an absorber, an evaporator, a regenerator, a condenser, and a solution heat exchanger as main components, which are connected by a pipe, In an absorption heat pump that leads an exhaust heat source to an evaporator and a regenerator, a cooling source to a condenser, and obtains a high temperature heated medium in the absorber, a heated medium liquid is introduced into the heated medium inlet of the absorber, deriving a heated medium of the heating medium outlet or et steam, the makeup water pump with the heated medium inlet side of the absorber, the temperature detection means for detecting the steam temperature in the heated medium outlet side disposed respectively, There is provided heated medium liquid introduction amount adjusting means for adjusting the heated medium liquid introduction amount by controlling the makeup water pump so that the degree of superheat of the vapor derived from the detection signal of the temperature detection means becomes a target value, It is characterized by obtaining steam having a target superheat degree not containing any of the above.

Invention according to claim 2, in an absorption heat pump of claim 1, the heated liquid medium before heating in the absorber, exhaust heat source medium, the refrigerant vapor from the evaporator, the absorption solution, a condenser characterized by pre-heat at least one condensation heat.

According to a third aspect of the invention, in the absorption heat pump according to claim 1 or 2, as a multi-stage combination of the intake Osamuki and evaporation Hatsuki, characterized in that the temperature increase was in multiple stages.

According to the first aspect of the present invention, the liquid to be heated is introduced into the inlet of the medium to be heated of the absorber, and the liquid to be heated is obtained from the outlet of the medium to be heated and the vapor to be heated is contained. Pump power for supplying the heated medium liquid to the vessel can be reduced. For example, when high-temperature heat in which the medium to be heated is water (H ₂ O) is obtained in the form of high-temperature water, if the temperature difference between the inlet and outlet of the high-temperature water is 5K, for example, in the present invention in which this is obtained in the form of steam, about 100 minutes Therefore, the pump power is small. Even when the amount of the heat medium liquid is increased to improve heat transfer and gas-liquid separation is adopted at the outlet, a flow rate of about 1/50 is sufficient.

In addition, a makeup water pump is disposed on the heated medium inlet side of the absorber, and temperature detection means for detecting the vapor temperature is disposed on the heated medium outlet side, respectively, and the degree of superheat of steam derived from the detection signal of the temperature detection means Since the heating medium liquid introduction amount adjusting means for adjusting the introduction amount of the heating medium liquid by adjusting the replenishing water pump so as to reach the target value is provided, it is possible to obtain steam having a target superheat degree that does not include droplets. it can.

According to the second aspect of the present invention, the heated medium liquid is preliminarily heated with at least one of the exhaust heat source medium, the refrigerant vapor from the evaporator, the absorption solution, and the condensation heat of the condenser before being heated by the absorber. Since it heats, since the to-be-heated medium liquid is preheated and supplied to an absorber, the conversion efficiency into a vapor | steam improves.

According to the third aspect of the present invention, the combination of the absorber and the evaporator is multistage, and the temperature rise is multistage, so that a higher temperature heating medium vapor can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, an example is shown in which exhaust warm water and exhaust steam are used as the heat source of the regenerator G and the evaporator E, but exhaust gas or the like may be used as the heat source. Although an example in which cooling water is used as the cooling source of the condenser C is shown, air (air cooling method) or the like may be used as the cooling source.

  FIG. 1 is a diagram showing a configuration example of an absorption heat pump according to the present invention. As shown in the figure, this absorption heat pump includes an absorber A, an evaporator E, a regenerator G, a condenser C, and a solution heat exchanger X as main components. A concentrated solution tube 2 that leads the concentrated solution from the regenerator G to the absorber A by the solution pump 1, a diluted solution tube 4 that guides the diluted solution from the absorber A to the regenerator G, and the refrigerant liquid is evaporated by the refrigerant pump 5. A refrigerant pipe 6 that leads to the regenerator E, a flow path 7 that leads the refrigerant vapor evaporated in the evaporator E to the absorber A, and a flow path 8 that leads the refrigerant vapor generated in the regenerator G to the condenser C are provided. Each device is connected.

  The condenser C has a cooling water pipe 9 that leads the cooling water 101, the evaporator E and the regenerator G have hot water pipes 10 and 11 that lead the hot water 102, and the absorber A has a desired high-temperature steam. An evaporation tube 12 is provided. A supply water pipe 3 for supplying water 103 as a heating medium liquid is connected to the inlet of the evaporation pipe 12, and a steam pipe 13 for discharging the steam 104 is connected to the outlet. 14 is a heat exchanger for heating (preheating) the water 103 supplied to the absorber A through the makeup water pipe 3 by the makeup water pump 16 with the dilute solution from the absorber A, and 15 is the heat source. It is a heat exchanger for heating (preheating) with hot water 102.

  In the absorption heat pump having the above-described configuration, when the heat source hot water 102 is supplied to the hot water pipe 11 of the regenerator G, the solution in the regenerator G evaporates to become a concentrated solution. Heated through the exchanger X, sent to the absorber A, and sprayed on the heat transfer surface of the evaporation tube 12. On the other hand, the refrigerant sent to the evaporator E by the refrigerant pump 5 is heated and evaporated by the heat source hot water 102 passing through the hot water pipe 10, and the refrigerant vapor reaches the absorber A through the flow path 7 and becomes the scattered concentrated solution. Absorbed and the concentrated solution becomes a dilute solution. The concentrated solution is heated by the absorption heat at this time and reaches a high temperature corresponding to an increase in boiling point, the heat transfer surface of the evaporation pipe 12 is heated, the water 103 passing through the evaporation pipe 12 is heated, and the steam 104 is generated. It is discharged from the tube 13.

  The dilute solution in the absorber A passes through the dilute solution tube 4, the water 103 that passes through the replenishment water tube 3 is heated by the heat exchanger 14, the concentrated solution that passes through the concentrated solution tube 2 is heated by the solution heat exchanger X, and the regenerator G Return to. If the water 103 is heated by the heat exchanger 14 and this temperature is brought into a state of being superheated with respect to the evaporation pressure or being able to generate steam, the heat transfer in the vicinity of the inlet of the absorber A can be greatly improved. The steam generated in the regenerator G reaches the condenser C through the flow path 8, is cooled and condensed by the cooling water 101 passing through the cooling water pipe 9, and the cycle is repeated. In addition, you may heat the heat exchanger 14 with the solution of the absorber A by providing in the absorber A. The position of the heat exchanger 14 in that case may be the inlet, the middle or the outlet of the absorber A.

  The absorber A is provided with a liquid level gauge 17 for detecting the outlet liquid level, and the detection output of the liquid level gauge 17 is sent to an inverter 18 for driving the solution pump 1 to control the solution pump 1. Thus, the flow rate of the concentrated solution sent from the regenerator G to the absorber A is controlled, and the liquid level at the outlet liquid level of the absorber A is ensured at a specified level. Further, the evaporator E is also provided with a liquid level gauge 19 for detecting the liquid level, the detection output of the liquid level gauge 19 is output to the control valve 20, and the control valve 20 is controlled so that the condenser C The liquid level of the evaporator E is secured by controlling the flow rate of the supplied refrigerant. Further, the steam pipe 13 is provided with a thermometer 21 for detecting the temperature of the steam, and the supplementary water pump 16 is controlled so that the degree of superheat of the steam passing through the steam pipe 13 becomes a target value with this detection output. By controlling the flow rate of the water 103, the water vapor 104 that does not contain droplets can be obtained.

  As described above, the water 103 that is the medium to be heated supplied from the replenishment water pipe 3 is heated by the evaporation pipe 12 of the absorber A to form the high-temperature steam 104, thereby reducing the flow rate of the water that is the medium to be heated. Less. For example, if the inlet / outlet temperature difference of the evaporation pipe 12 is 5K, for example, when it is obtained in the form of the steam 104, the flow rate is 1/100 compared with the case where it is obtained in the form of high-temperature water. Even when the flow rate of the water 103, which is the medium to be heated, is increased to improve heat transfer and the gas-liquid separator 22 is provided as shown in FIG. The power of the makeup water pump 16 can be greatly reduced.

  FIG. 2 is a diagram showing another configuration example of the absorption heat pump according to the present invention. 2, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. The same applies to other drawings. As shown in FIG. 2, the present absorption heat pump has a gas-liquid separator 22 connected to the outlet of the evaporation pipe 12 of the absorber A and a replenishment water pipe 3 connected to the gas-liquid separator 22. The water 103 supplied to 22 and the water separated from the steam are sent to the evaporation pipe 12 by a pump 23. Further, the gas-liquid separator 22 is provided with a liquid level gauge 24, and the replenishment water pump 16 is controlled by the detection output of the liquid level gauge 24, whereby the liquid level in the gas-liquid separator 22 is set to a predetermined level. To ensure.

  As described above, the gas-liquid separator 22 is provided, and the heat 103 on the heated medium side is introduced by introducing the water 103, which is the heated medium liquid of about 1 to 2 times the evaporation amount, into the evaporation pipe 12 of the absorber A. The coefficient can be increased and higher temperature steam can be obtained. However, in this case, there are two pumps (the makeup water pump 16 and the pump 23). It should be noted that the position of the liquid level can be increased and a bubble pump can be used instead of the pump 23.

  FIG. 3 is a diagram showing another configuration example of the absorption heat pump according to the present invention. As shown in FIG. 3, this absorption heat pump is provided with a preheating pipe 25 in the condenser C, the replenishment water pipe 3 is connected to the preheating pipe 25, and the water 103 as the medium to be heated is first condensed by the replenishment water pump 16. Heating with the refrigerant vapor of the evaporator C, then heating with the refrigerant vapor generated in the evaporator E through the heat transfer pipe 15-1 provided in the evaporator E, and subsequently heating with the heat source hot water 102 in the heat exchanger 15, Further, the heat exchanger 14 heats the diluted solution from the absorber A and sends it to the gas-liquid separator 22. Further, the control valve 26 is controlled by the detection output of the level gauge 24 of the gas-liquid separator 22 to control the flow rate of the water 103, and the liquid level of the liquid level in the gas-liquid separator 22 is secured at a predetermined level. In this way, the water 103 as the heating medium liquid is first guided to the preheating pipe 25 of the condenser C to exchange heat with the refrigerant vapor from the regenerator G, so that the water 103 as the heating medium liquid is saturated with the refrigerant vapor. If it is lower, the refrigerant vapor condenses and the water 103 is heated. Note that the heat exchanger 15 may be omitted, and the water 103 may be heated with the refrigerant vapor from the evaporator E by the heat transfer tube 15-1 provided in the evaporator E. In such a case, a heat exchanger is provided more simply than the heat exchanger 15. Further, it is preferable to install the preheating pipe 25 closer to the regenerator G than the cooling water pipe 9. In such a case, since the superheated steam having the same temperature as the solution is generated from the solution heated by the regenerator G, the feed water can be heated more efficiently.

  FIG. 4 is a diagram showing another configuration example of the absorption heat pump according to the present invention. This absorption heat pump shows an example of two-stage temperature rise. As shown in FIG. 4, a high-temperature absorber AH and a gas-liquid separator EHS are provided. Here, the absorber A in FIGS. 1 and 3 is a low-temperature absorber, and the evaporator E is a low-temperature evaporator. The high temperature evaporator EH is the heated side of the low temperature absorber A. The refrigerant liquid sent from the condenser C through the refrigerant pipe 6 is supplied to the gas-liquid separator EHS through the control valve 32 and the refrigerant branch pipe 30. On the other hand, the refrigerant vapor from the high-temperature evaporator EH is sent to the gas-liquid separator EHS through the refrigerant pipe 34-1. As a result, the refrigerant liquid is heated and evaporated from the condenser C in the gas-liquid separator EHS. The gas-liquid separated refrigerant liquid returns to the low-temperature absorber A through the refrigerant pipe 34-2. A baffle plate 33 is provided in the gas-liquid separator EHS. Although the heat exchanger 14 uses the outlet solution of the low-temperature absorber A as a heating fluid, the heat exchanger 14 may be provided in the low-temperature absorber A, and the solution in the low-temperature absorber A may be used as a heating fluid. Further, instead of the solution of the low temperature absorber A, the refrigerant vapor of the high temperature evaporator EH may be used as a heating source.

  The concentrated solution from the regenerator G is heated (preheated) by the solution pump 1 through the solution heat exchanger X and the heat exchanger 39 and sent to the high temperature absorber AH, where the refrigerant vapor from the gas-liquid separator EHS is sent. Is absorbed in a concentrated solution, which becomes a dilute solution. The concentrated solution is heated by the absorption heat at this time and reaches a high temperature corresponding to an increase in boiling point, heating the heat transfer surface of the evaporation pipe 35, and the water 103 passing through the evaporation pipe 35 is heated to become steam. The water vapor is introduced into the gas-liquid separator 22 to be gas-liquid separated, and the water vapor 104 is discharged from the vapor pipe 13.

  The dilute solution in the high temperature absorber AH passes through the dilute solution tube 37 and heats the water 103 supplied to the gas-liquid separator 22 by the heat exchanger 38, and further the concentrated solution sent to the high temperature absorber AH by the heat exchanger 39. Is heated and flows into the low-temperature absorber A through the control valve 40. The control valve 40 is controlled by the output of the liquid level gauge 17 for detecting the outlet liquid level of the low temperature absorber A, and the liquid level at the liquid level at the outlet of the low temperature absorber A is secured at a predetermined level. Further, the high-temperature absorber AH is provided with a liquid level gauge 36 for detecting the liquid level at the outlet, and the detection output of the liquid level gauge 36 is sent to the inverter 18 for driving the solution pump 1 to control the solution pump 1. By doing this, the flow rate of the concentrated solution sent to the high-temperature absorber AH is controlled to ensure the liquid level at the liquid level at the outlet of the high-temperature absorber AH at a predetermined level. Further, the gas-liquid separator EHS is provided with a liquid level gauge 31. The control valve 32 is controlled by the detection output of the liquid level gauge 31, and the liquid level of the gas-liquid separator EHS is set to a predetermined level. To ensure. Further, the liquid level of the low-temperature evaporator E is also controlled by controlling the control valve 20 with the detection output of the liquid level gauge 19 to adjust the supply amount of the refrigerant liquid from the condenser C to ensure a predetermined level.

  In the absorption heat pump having the configuration shown in FIGS. 1 to 4, the evaporator E has a configuration in which the hot water pipe 10 that guides the heat source hot water 102 into the refrigerant liquid is disposed. The evaporator E is shown in FIG. Of course, it is also possible to use a spray-type evaporator that sprays the refrigerant liquid from the condenser C onto the hot water pipe 10 that guides the heat source hot water 102.

  FIG. 5 is a diagram showing another configuration example of the absorption heat pump according to the present invention. The absorption heat pump shown in FIGS. 1 to 4 is different from the absorption heat pump shown in FIGS. 1 to 4 in the absorption heat pump shown in FIGS. 1 to 4 in which the dilute solution from the absorber A is connected in series with the heat exchanger 14 and the solution heat exchanger X. In contrast, in the absorption heat pump of FIG. 5, the dilute solution from the absorber A is allowed to flow in parallel to the heat exchanger 14 and the solution heat exchanger X. The dilute solution in which the water 103 passing through the replenishment water pipe 3 is heated by the heat exchanger 14 and the dilute solution in which the concentrated solution passing through the concentrated solution pipe 2 is heated in the solution heat exchanger X are merged and supplied to the regenerator G. It is sprayed on the hot water pipe 11 through which the heat source hot water 102 passes.

  In this absorption heat pump, as shown in FIG. 5, the evaporator E employs a spraying method in which the refrigerant liquid from the condenser C is sprayed on the hot water pipe 10 that guides the heat source hot water 102. Naturally, as shown in FIGS. 1 to 4, E may use an evaporator having a configuration in which the hot water pipe 10 is disposed in the refrigerant liquid.

  In the absorption heat pump having the configuration shown in FIGS. 1 to 5, the heat exchanger 15, the absorber A, or the high-temperature absorption that heats the water 103 that is the medium to be heated to be sent to the absorber A or the high-temperature absorber AH with the heat source hot water 102. It is heated (preheated) by a heat exchanger 14 that is heated with a dilute solution (absorbing solution) from the vessel AH, and introduced into the absorber A, the high-temperature absorber AH, or the gas-liquid separator 22. Accordingly, when COP = the heating amount of the medium to be heated / the heat source heat amount, and COPX = the heating amount / heat source heat amount in the absorber A or the high-temperature absorber AH, the COPX is increased by the one-step temperature increase in FIGS. 1 to 3 and FIG. It is about 0.4 to 0.5. Moreover, COPX is about 0.26 to 0.33 in the two-step temperature increase in FIG. When preheating of the water 103 that is the liquid to be heated is performed with the heat source hot water 102, since the medium to be heated / heat source heat amount = 1 in the preheating portion, COP> COPX can be satisfied. Further, when preheating is performed by sensible heat of the solution of the absorber A or the high-temperature absorber AH, the amount of heat to be heated / heat source becomes higher than that of COPX, and COP can be improved. The same effect can be obtained by preheating the heated medium 103 with the refrigerant vapor from the evaporator E.

  FIG. 6 is a view showing another configuration example of the absorption heat pump according to the present invention. This absorption heat pump is different from the absorption heat pump shown in FIG. 1 in that the exhaust heat 110 is used as a heat source for the regenerator G and the evaporator E in the absorption heat pump. As shown in the figure, the exhaust steam 110 is caused to flow in parallel through a steam pipe 41 disposed in the evaporator E and a steam pipe 42 disposed in the regenerator G, and the refrigerant liquid is heated in the evaporator E and in the regenerator G. Heat the dilute solution. The exhaust steam 110 that has lost heat in the steam pipe 41 and the steam pipe 42 condenses and becomes drainage. Since this drain is at a high temperature similar to the saturation temperature of the steam, the drain heat exchanger 43 passes through the drain heat exchanger 43. The water 103 passing through the makeup water pipe 3 is preheated by the heat exchanger 43 and discharged as a drain 111. Thus, even if exhaust steam is used as a heat source, the same effect as the absorption heat pump shown in FIG. 1 can be obtained.

  FIG. 7 shows an absorption heat pump according to the present invention, in which heat source hot water 102 is used as a heat source for the regenerator G and the evaporator E, and the heat source hot water 102 is heated when flowing from the evaporator E to the regenerator G connected in series. It is a figure which shows the pattern of the preheating of the water 103 which is a medium. FIG. 7A shows a case where the water 103 is preheated with the condensation heat of the condenser C and supplied to the absorber A. In FIG. 7B, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 passing through the evaporator E and the regenerator G connected in series by the heat exchanger 50, to the absorber A. The supply case is shown. FIG. 7C shows a case where the water 103 is preheated with the condensation heat of the condenser C, further preheated with the heat source hot water 102 that has passed through the evaporator E by the heat exchanger 51, and supplied to the absorber A. In FIG. 7D, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 before passing through the evaporator E and the regenerator G connected in series by the heat exchanger 52, and the absorber A The case where it supplies to is shown. In FIG. 7E, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 that flows in a bypass by the evaporator E and the regenerator G connected in series by the heat exchanger 53, and the absorber. A case of supplying to A is shown.

  7 (F) to 7 (T) are solutions in which an absorption heat pump exchanges heat between a concentrated solution supplied from the regenerator G to the absorber A and a dilute solution supplied from the absorber A to the regenerator G. The heat exchanger Hex is configured (the solution heat exchanger Hex is provided in all absorption heat pumps, not limited to F to T), and the water 103 is preheated with the condensation heat of the condenser C. . FIG. 7F shows the absorber A in which the concentrated solution supplied from the regenerator G to the absorber A is heated in the heat exchanger 54 through the solution heat exchanger Hex in the water 103 preheated by the condensation heat of the condenser C. The case where it preheats with the dilute solution from and supplies to the absorber A is shown. FIG. 7G shows a case where the water 103 preheated with the heat of condensation of the condenser C is preheated with a dilute solution from the absorber A before passing through the solution heat exchanger Hex in the heat exchanger 55 and supplied to the absorber A. Show. In FIG. 7H, water 103 preheated with the heat of condensation in the condenser C is preheated with the dilute solution from the absorber A that flows in by bypassing the solution heat exchanger Hex in the heat exchanger 56 and supplied to the absorber A. Show the case.

  In FIG. 7I, the water 103 preheated with the heat of condensation of the condenser C is preheated with the heat source hot water 102 passing through the evaporator E and the regenerator G connected in series with the heat exchanger 50, and further, with the heat exchanger 54. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown. In FIG. 7J, the water 103 preheated with the heat of condensation in the condenser C is preheated with the heat source hot water 102 that has passed through the evaporator E by the heat exchanger 51 and further passed through the solution heat exchanger Hex by the heat exchanger 54. The case where the concentrated solution supplied from the regenerator G to the absorber A is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown. FIG. 7K shows the absorber A in which the concentrated solution supplied from the regenerator G to the absorber A is passed through the solution heat exchanger Hex in the water 103 preheated by the condensation heat of the condenser C. In this case, preheating is performed with the dilute solution from the heat source, and further preheated with the heat source hot water 102 before passing through the evaporator E and the regenerator G connected in series by the heat exchanger 52 and supplied to the absorber A. FIG. 7 (L) shows the preheated water 103 preheated by the condensation heat of the condenser C by the heat source hot water 102 which flows in by bypassing the evaporator E and the regenerator G connected in series by the heat exchanger 53, and further heat exchange. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown.

  In FIG. 7M, the water 103 preheated by the heat of condensation of the condenser C is preheated by the heat source hot water 102 that passes through the evaporator E and the regenerator G connected in series by the heat exchanger 50, and further in the heat exchanger 55. The case where it preheats with the dilute solution from the absorber A before passing the solution heat exchanger Hex, and supplies to the absorber A is shown. In FIG. 7N, the water 103 preheated with the heat of condensation in the condenser C is preheated with the heat source hot water 102 that has passed through the evaporator E in the heat exchanger 51 and further passed through the solution heat exchanger Hex in the heat exchanger 55. The case where it preheats with the dilute solution from the absorber A and supplies to the absorber A is shown. In FIG. 7 (O), the water 103 preheated with the heat of condensation in the condenser C is preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the heat exchanger 55 and further in series in the heat exchanger 52. The preheated with the heat source hot water 102 before passing through the evaporator E and the regenerator G connected to, and supplied to the absorber A is shown. In FIG. 7 (P), the water 103 preheated by the heat of condensation of the condenser C is preheated by the heat source hot water 102 which flows in by bypassing the evaporator E and the regenerator G connected in series by the heat exchanger 53, and further heat exchange. The case where the preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the vessel 55 is supplied to the absorber A is shown.

  In FIG. 7Q, the water 103 preheated with the heat of condensation of the condenser C is preheated with the heat source hot water 102 passing through the evaporator E and the regenerator G connected in series with the heat exchanger 50, and further with the heat exchanger 56. A case where the solution heat exchanger He is bypassed from the absorber A and preheated with a dilute solution from the absorber A that flows in and supplied to the absorber A is shown. In FIG. 7 (R), the water 103 preheated by the heat of condensation in the condenser C is preheated by the heat source hot water 102 that has passed through the evaporator E by the heat exchanger 51, and the solution heat exchanger He is bypassed by the heat exchanger 56. The case where it preheats with the dilute solution from the absorber A which flows in and supplies to the absorber A is shown. In FIG. 7S, the water 103 preheated by the heat of condensation of the condenser C is preheated by the dilute solution from the absorber A that flows in by bypassing the solution heat exchanger Hex by the heat exchanger 56, and then the heat exchanger 52. The case where preheating is performed with the heat source hot water 102 before passing through the evaporator E and the regenerator G connected in series in FIG. In FIG. 7 (T), the water 103 preheated by the condensation heat of the condenser C is preheated by the heat source hot water 102 which flows in by bypassing the evaporator E and the regenerator G connected in series by the heat exchanger 53, and further heat exchange. The case where it preheats with the dilute solution from the absorber A which flows in by bypassing the solution heat exchanger Hex by the vessel 56 and supplies it to the absorber A is shown.

  FIG. 8 shows the water 103 when the heat source hot water 102 is used as the heat source of the regenerator G and the evaporator E in the absorption heat pump according to the present invention, and the heat source hot water 102 is flowed through the regenerator G → the evaporator E connected in series. It is a figure which shows the preheating pattern. FIG. 8A shows a case where the water 103 is preheated with the condensation heat of the condenser C and supplied to the absorber A. In FIG. 8B, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 that passes through the regenerator G and the evaporator E connected in series by the heat exchanger 50, and is absorbed by the absorber A. The supply case is shown. FIG. 8C shows a case where the water 103 is preheated with the condensation heat of the condenser C, further preheated with the heat source hot water 102 that has passed through the regenerator G by the heat exchanger 51, and supplied to the absorber A. In FIG. 8D, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 before passing through the regenerator G and the evaporator E connected in series by the heat exchanger 52, and the absorber A The case where it supplies to is shown. In FIG. 8E, the water 103 is preheated by the heat of condensation of the condenser C, and further preheated by the heat source hot water 102 flowing in by bypassing the regenerator G and the evaporator E connected in series by the heat exchanger 53, and absorbed. The case where it supplies to the container A is shown.

  8 (F) to 8 (T) all show solutions in which an absorption heat pump exchanges heat between a concentrated solution supplied from the regenerator G to the absorber A and a dilute solution supplied from the absorber A to the regenerator G. The heat exchanger Hex is configured (the solution heat exchanger Hex is provided in all absorption heat pumps, not limited to F to T), and the water 103 is preheated with the condensation heat of the condenser C. . FIG. 8F shows the absorber A in which the concentrated solution supplied from the regenerator G to the absorber A is passed through the solution heat exchanger Hex in the water 103 preheated with the condensation heat of the condenser C. The case where it preheats with the dilute solution from and supplies to the absorber A is shown. FIG. 8G shows a case where the water 103 preheated with the heat of condensation in the condenser C is preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the heat exchanger 55 and supplied to the absorber A. Show. In FIG. 8H, water 103 preheated with the heat of condensation of the condenser C is preheated with the dilute solution from the absorber A that flows in by bypassing the solution heat exchanger Hex by the heat exchanger 56 and supplied to the absorber A. Show the case.

  In FIG. 8I, the water 103 preheated with the heat of condensation of the condenser C is preheated with the heat source hot water 102 passing through the regenerator G and the evaporator E connected in series with the heat exchanger 50, and further with the heat exchanger 54. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown. In FIG. 8J, the water 103 preheated with the heat of condensation in the condenser C is preheated with the heat source hot water 102 that has passed through the regenerator G in the heat exchanger 51 and further passed through the solution heat exchanger Hex in the heat exchanger 54. The case where the concentrated solution supplied from the regenerator G to the absorber A is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown. FIG. 8K shows the absorber A in which the concentrated solution supplied from the regenerator G to the absorber A is passed through the solution heat exchanger Hex in the water 103 preheated with the condensation heat of the condenser C. In this case, preheating is performed with the dilute solution from the heat source, and further preheated with the heat source hot water 102 before passing through the regenerator G and the evaporator E connected in series by the heat exchanger 52 and supplied to the absorber A. FIG. 8L shows the preheated water 103 preheated by the condensation heat of the condenser C by the heat source hot water 102 that flows in by bypassing the evaporator E and the regenerator G connected in series by the heat exchanger 53, and further heat exchange. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown.

  FIG. 8 (M) shows the preheated water 103 preheated by the condensation heat of the condenser C by the heat source hot water 102 passing through the regenerator G and the evaporator E connected in series by the heat exchanger 50, and further by the heat exchanger 55. The case where it preheats with the dilute solution from the absorber A before passing the solution heat exchanger Hex, and supplies to the absorber A is shown. In FIG. 8N, the water 103 preheated with the heat of condensation in the condenser C is preheated with the heat source hot water 102 that has passed through the regenerator G in the heat exchanger 51 and further passed through the solution heat exchanger Hex in the heat exchanger 55. The case where it preheats with the dilute solution from the absorber A and supplies to the absorber A is shown. 8 (O), water 103 preheated by the condensation heat of the condenser C is preheated by the dilute solution from the absorber A before passing through the solution heat exchanger Hex by the heat exchanger 55, and further in series by the heat exchanger 52. The case where the heat source hot water 102 before passing through the regenerator G and the evaporator E connected to the preheater G is preheated and supplied to the absorber A is shown. In FIG. 8 (P), the water 103 preheated by the heat of condensation of the condenser C is preheated by the heat source hot water 102 flowing in a bypass manner through the regenerator G and the evaporator E connected in series by the heat exchanger 53, and further the heat exchanger. 55 shows a case where the preheated diluted solution from the absorber A before passing through the solution heat exchanger Hex is supplied to the absorber A.

  In FIG. 8Q, the water 103 preheated with the heat of condensation of the condenser C is preheated with the heat source hot water 102 passing through the regenerator G and the evaporator E connected in series with the heat exchanger 50, and then the heat exchanger 56. The case where it preheats with the dilute solution which flows in by bypassing the solution heat exchanger Hex from the absorber A, and supplies it to the absorber A is shown. FIG. 8 (R) shows a preheated water 103 preheated by the heat of condensation of the condenser C by the heat source hot water 102 that has passed through the regenerator G by the heat exchanger 51, and further a solution heat exchanger from the absorber A by the heat exchanger 56. The case where it preheats with the dilute solution which flows in by bypassing Hex and supplies it to the absorber A is shown. In FIG. 8S, the water 103 preheated with the heat of condensation in the condenser C is preheated with a dilute solution flowing from the absorber A by bypassing the solution heat exchanger Hex by the heat exchanger 56, and further, The case where it preheats with the heat source warm water 102 before passing through the evaporator E and the regenerator G connected in series, and supplies to the absorber A is shown. In FIG. 8 (T), the water 103 preheated by the condensation heat of the condenser C is preheated by the heat source hot water 102 that flows in by bypassing the evaporator E and the regenerator G connected in series by the heat exchanger 53, and further heat exchange is performed. A case is shown in which a preheated dilute solution is supplied from the absorber A by bypassing the solution heat exchanger Hex from the absorber A to the absorber A.

  FIG. 9 shows the water 103 when heat source hot water 102 is used as a heat source for the regenerator G and the evaporator E in the absorption heat pump according to the present invention, and the heat source hot water 102 flows to the regenerator G and the evaporator E connected in parallel. It is a figure which shows the preheating pattern. FIG. 9A shows a case where the water 103 is preheated with the condensation heat of the condenser C and supplied to the absorber A. In FIG. 9B, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 joined through the regenerator G and the evaporator E connected in parallel by the heat exchanger 50. A case of supplying to A is shown. In FIG. 9C, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 before passing through the regenerator G and the evaporator E connected in parallel by the heat exchanger 52, and the absorber A The case where it supplies to is shown. In FIG. 9D, the water 103 is preheated with the heat of condensation of the condenser C, and further preheated with the heat source hot water 102 flowing in by bypassing the evaporator E and the regenerator G connected in parallel by the heat exchanger 53, and absorbed. The case where it supplies to the container A is shown.

  9 (E) to 9 (P) all show solutions in which an absorption heat pump exchanges heat between a concentrated solution supplied from the regenerator G to the absorber A and a dilute solution supplied from the absorber A to the regenerator G. It is the structure provided with the heat exchanger Hex (solution heat exchanger Hex is provided in all absorption heat pumps not only EP), and water 103 as a to-be-heated medium is condensed with the condensation heat of the condenser C. It preheats. FIG. 9E shows the absorber A in which the concentrated solution supplied from the regenerator G to the absorber A through the heat exchanger 54 passes through the solution heat exchanger Hex in the water 103 preheated by the condensation heat of the condenser C. The case where it preheats with the dilute solution from and supplies to the absorber A is shown. FIG. 9 (F) shows a case where the water 103 preheated with the heat of condensation of the condenser C is preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the heat exchanger 55 and supplied to the absorber A. Show. In FIG. 9G, the water 103 preheated with the heat of condensation of the condenser C is preheated with the dilute solution from the absorber A that flows in by bypassing the solution heat exchanger Hex by the heat exchanger 56 and supplied to the absorber A. Show the case.

  FIG. 9 (H) shows the preheated water 103 preheated with the heat of condensation in the condenser C by the regenerator G and the evaporator E connected in parallel by the heat exchanger 50 and then the heat source hot water 102 that has joined together, and further heat exchange. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown. FIG. 9 (I) shows an absorber A in which the concentrated solution supplied from the regenerator G to the regenerator A is heated by the heat exchanger 54 through the solution heat exchanger Hex in the water 103 preheated by the condensation heat of the condenser C. In this case, preheating is performed with a dilute solution from the heat source, preheated with the heat source hot water 102 before passing through the regenerator G and the evaporator E connected in parallel by the heat exchanger 52, and supplied to the absorber A. FIG. 9 (J) shows the preheated water 103 preheated by the condensation heat of the condenser C by the heat source hot water 102 which flows in by bypassing the evaporator E and the regenerator G connected in parallel by the heat exchanger 53, and further heat exchange. The case where the concentrated solution supplied from the regenerator G to the absorber A through the solution heat exchanger Hex is preheated with the diluted solution from the heated absorber A and supplied to the absorber A is shown.

  FIG. 9K shows a preheated water 103 preheated by the heat of condensation in the condenser C by the heat source hot water 102 which has been joined after passing through the regenerator G and the evaporator E connected in parallel by the heat exchanger 50, and further heat exchange. The case where the preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the vessel 55 is supplied to the absorber A is shown. In FIG. 9L, the water 103 preheated with the condensation heat of the condenser C is preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex by the heat exchanger 55 and further paralleled by the heat exchanger 52. The case where the heat source hot water 102 before passing through the regenerator G and the evaporator E connected to the preheater G is preheated and supplied to the absorber A is shown. In FIG. 9M, water 103 preheated by the condensation heat of the condenser C is preheated by the heat source hot water 102 which flows in by bypassing the regenerator G and the evaporator E connected in parallel by the heat exchanger 53, and further heat exchange. The case where the preheated with the dilute solution from the absorber A before passing through the solution heat exchanger Hex in the vessel 55 is supplied to the absorber A is shown.

  FIG. 9 (N) shows a preheated water 103 preheated by the condensation heat of the condenser C with the heat exchanger 50 connected in parallel with the heat exchanger 50 and the evaporator E, and then preheated with the heat source hot water 102 that has joined, and further heat exchange. A case is shown in which a preheated dilute solution is supplied from the absorber A by bypassing the solution heat exchanger Hex from the absorber A to the absorber A. 9 (O), the water 103 preheated with the heat of condensation in the condenser C is preheated with the dilute solution from the absorber A that flows in by bypassing the solution heat exchanger Hex in the heat exchanger 56, and further the heat exchanger 52. A case where the heat source hot water 102 before passing through the evaporator E and the regenerator G connected in parallel is preheated and supplied to the absorber A is shown. In FIG. 9 (P), the water 103 preheated by the condensation heat of the condenser C is preheated by the heat source hot water 102 which flows in by bypassing the evaporator E and the regenerator G connected in parallel by the heat exchanger 53, and further heat exchange. The case where the preheated with the dilute solution which bypassed the solution heat exchanger Hex from the absorber A with the absorber 56 is supplied to the absorber A is shown.

  FIG. 10 is a diagram showing a preheating pattern of the two-stage temperature rising absorption heat pump according to the present invention. The absorption heat pump includes a condenser C, an evaporator E, a regenerator G, a low temperature absorber AL, a high temperature evaporator EH, In addition, the heat source hot water 102 is used as a heat source of the regenerator G and the evaporator E. The concentrated solution 120 supplied from the regenerator G to the high temperature absorber AH, the dilute solution 121 supplied from the high temperature absorber AH to the low temperature absorber AL, and the dilute solution supplied from the low temperature absorber AL to the regenerator G. A solution heat exchanger Hex1 and a solution heat exchanger Hex2 that exchange heat with 122 are provided. The water 103 is preheated with the condensation heat of the condenser C, preheated with the heat source hot water 102 passing through the regenerator G and the evaporator E connected in series with the heat exchanger 50, and the solution heat exchanger Hex2 is added with the heat exchanger 59. By preheating with the dilute solution 122 supplied to the regenerator G from the low-temperature absorber AL that flows in by bypass, the solution heat exchanger Hex1 is further bypassed by the heat exchanger 60 and supplied from the high-temperature absorber AH to the low-temperature absorber AL. The pre-heated dilute solution 121 is supplied to the high-temperature absorber AH.

  FIG. 11 is a diagram showing a preheating pattern of the two-stage temperature rising absorption heat pump according to the present invention. The absorption heat pump includes a condenser C, an evaporator E, a regenerator G, a low temperature absorber AL, a high temperature evaporator EH, In addition, the heat source hot water 102 is used as a heat source of the regenerator G and the evaporator E. Then, the dilute solution 123 supplied from the high temperature absorber AH to the regenerator G, the concentrated solution 124 supplied from the low temperature absorber AL to the high temperature absorber AH, and the concentrated solution supplied from the regenerator G to the low temperature absorber AL. A solution heat exchanger Hex1 and a solution heat exchanger Hex2 that exchange heat with 125 are provided. The water 103 is preheated with the condensation heat of the condenser C, preheated with the heat source hot water 102 passed through the regenerator G and the evaporator E connected in series with the heat exchanger 50, and the solution heat exchanger Hex2 is set with the heat exchanger 62. The solution heat exchanger Hex1 connected in parallel to flow in and the heat exchanger 61 are preheated with the dilute solution 123 from the high-temperature absorber AH that has passed through the heat exchanger 61, and the solution heat exchanger Hex1 is further heated by the heat exchanger 61. It is preheated with a dilute solution 123 from the high-temperature absorber AH that flows in by bypass, and is supplied to the high-temperature absorber.

  As shown in FIGS. 7A, 8A, and 9A, the present absorption heat pump uses the heat released from the condenser C, that is, the heat of condensation of the refrigerant, to preheat the water 103 that is the medium to be heated. Since the heat of condensation of the refrigerant is originally discarded in the cooling tower or the like, it is desirable to recover and use it as a preheating source for the water 103. The water 103 can be used when the temperature is lower than that of the condenser C. For example, when the water temperature of the cooling water in the cooling tower is 35 ° C. and the water temperature of the water 103 is 25 ° C., the water 103 can be heated by about 10 ° C. . Heat may be taken directly from the condenser C or from cooling water.

  As the heat source of the absorption heat pump according to the present invention, various heat sources such as exhaust hot water, exhaust gas, and exhaust steam can be used. Here, the heat source hot water 102 which is the waste water is used. Although the temperature of the waste water is generally lower than the absorption heat generated in the absorber A, but the amount of heat is abundant, it can be preheated to a temperature higher than that of the condenser C by using it as a preheating source. As the preheating position and the heat source combination pattern, for example, various patterns are considered as shown in FIGS. 7 (B) to (T), FIGS. 8 (B) to (T), and FIGS. 9 (B) to (P). It is done.

  Similarly, in the case of a multistage temperature rising absorption heat pump, the effect of increasing the amount of heat generated by the low temperature absorber AL and the high temperature absorber AH can be obtained by preheating the water 103 that is the medium to be heated. In the case of two-stage temperature rise or multi-stage temperature rise, each part of the preheating cycle with the solution can be considered. 10 and 11 show examples in the case of two-stage temperature rise.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. Example 1 It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. (Example 2) It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. (Example 3) It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. Example 4 It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. (Example 5) It is a figure which shows the structural example of the absorption heat pump which concerns on this invention. (Example 6) It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of the preheating pattern of the absorption heat pump which concerns on this invention. It is a figure which shows the example of a preheating pattern of the two-stage temperature rising absorption heat pump which concerns on this invention. It is a figure which shows the example of a preheating pattern of the two-stage temperature rising absorption heat pump which concerns on this invention.

Explanation of symbols

A absorber AH high temperature absorber C condenser E evaporator G regenerator X solution heat exchanger 1 solution pump 2 concentrated solution tube 3 make-up water tube 4 dilute solution tube 5 refrigerant pump 6 refrigerant tube 7 channel 8 channel 9 cooling water tube DESCRIPTION OF SYMBOLS 10 Hot water pipe 11 Hot water pipe 12 Evaporation pipe 13 Steam pipe 14 Heat exchanger 15 Heat exchanger 16 Supplementary water pump 17 Liquid level gauge 18 Inverter 19 Liquid level gauge 20 Control valve 21 Thermometer 22 Gas-liquid separator 23 Pump 24 Liquid level Total 25 Preheating pipe 30 Refrigerant branch pipe 31 Liquid level gauge 32 Control valve 33 Baffle plate 34 Refrigerant pipe 35 Evaporating pipe 36 Liquid level gauge 37 Dilute solution pipe 38 Heat exchanger 39 Heat exchanger 40 Control valve 41 Steam pipe 42 Steam pipe 43 Drain heat exchanger 50 Heat exchanger 52 Heat exchanger 53 Heat exchanger 54 Heat exchanger 55 Heat exchanger 56 Heat exchanger 56 Heat exchanger 59 Heat exchanger 60 Heat exchanger 61 Heat exchanger 6 Heat exchanger

Claims (3)

Absorber, evaporator, regenerator, condenser, and solution heat exchanger are the main components, and these are connected by pipes. The exhaust heat source is cooled by the evaporator and regenerator, and the condenser is cooled. In an absorption heat pump that leads a source and obtains a high-temperature heated medium in the absorber,
Wherein introducing the heated carrier liquid to the heated medium inlet of the absorber, it derives a heated medium if we steam heated medium outlet,
A supply water pump is disposed on the heated medium inlet side of the absorber, and temperature detecting means for detecting the vapor temperature is disposed on the heated medium outlet side, respectively, and the degree of superheat of the steam derived from the detection signal of the temperature detecting means The heating medium liquid introduction amount adjusting means for adjusting the introduction amount of the heating medium liquid by adjusting the replenishing water pump so as to reach the target value is provided to obtain steam having a target superheat degree not including droplets. Absorption heat pump. In the absorption heat pump according to claim 1 ,
The heated carrier liquid prior to heating at the absorber, exhaust heat source medium, the refrigerant vapor from the evaporator, absorbent solution, absorption heat pump, characterized in that the pre-heat at least one condenser condensing heat . In the absorption heat pump according to claim 1 or 2 ,
An absorption heat pump characterized in that a combination of the absorber and the evaporator is multistage, and the temperature rise is multistage.

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