JPS5913665B2 - Hybrid absorption heat pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hybrid absorption heat pump capable of simultaneously producing high temperature water and cold water.

Conventionally, in an absorption refrigeration cycle, if you wanted to obtain hot water at the same time as cooling, you would use a condenser or a separate dedicated hot water heat exchanger to generate hot water using the heat of steam generated in a generator, for example. When hot water or steam is used as a heat source for heating a solution in a generator, the temperature of the hot water obtained is lower than the temperature of the heat source hot water or steam, which is particularly important in power plants, which have recently become a problem in terms of energy conservation and pollution prevention. When using relatively low-temperature heat source hot water, such as heated waste water, in conventional absorption heat pumps, the temperature of the hot water obtained is low, making it of little value.

In addition, in order to obtain particularly high-temperature water, separate equipment such as a heat pump using a centrifugal chiller was required. a heat pump cycle comprising a heat pump cycle, a refrigeration cycle comprising a low-pressure side absorber and an evaporator;
Absorption heat pumps such as the example shown in the figure have been considered.

Here, G is the generator, C is the condenser, AH is the high pressure absorber, and A
L is a low pressure absorber, EH is a high pressure evaporator, EL is a low pressure evaporator, xH is a high pressure heat exchanger, xL is a low pressure heat exchanger, 1 is a solution pump, 2 is an intermediate concentration solution tube, 3 is a dilute solution tube, 5 is a concentrated solution pipe, 7 is a refrigerant pump, 8 is a refrigerant pipe, 12 is a branch pipe, 1
3, 14.15 are steam pipes, 16.17 are hot water pipes, 30 are return pipes, and 31.32 are cooling water pipes.

33 is a high temperature water pipe, and 34 is a cold water pipe.

Figure 2 shows the solution cycle diagram, and Mloo is the refrigerant 1
This is the 00% line.

From the outside, if hot water or the like as a heat source is led to the hot water pipe 16.17, and cooling water or the like as a cold heat source is led to the cooling water pipe 31.32 to operate the device, the high temperature water pipe 33f is heated to a high temperature that is higher than the heat source. Water is obtained, and cold water whose temperature is lower than that of the cold heat source is obtained in the cold water pipe 34.

Here, the cold water temperature is determined by a saturated vapor temperature device for the saturated vapor pressure PEL of the low pressure evaporator EL, and this saturated vapor pressure PEL is determined by the concentration of the solution exiting the low pressure absorber AL and the solution temperature t2L, and this concentration and the solution temperature It is considered that the temperature t2L is determined depending on the cooling water conditions.

Therefore, when the heating source conditions are given, the chilled water temperature becomes approximately constant if the cooling water conditions in the low pressure absorber AL, ie, the cooling water inlet temperature, the amount of cooling water, etc., are determined.

Also, the high temperature water temperature is the temperature of the solution exiting the high pressure absorber AH j
This solution temperature 14H is determined by the saturated vapor pressure PEH of the high pressure evaporator EH, which is determined by the saturated vapor temperature TEH in the high pressure evaporator EH, and this solution temperature 14H is determined by the saturated vapor temperature TEH in the high pressure evaporator EH.
is considered to be determined approximately by the heating source conditions.

Therefore, the high temperature water temperature depends on the heating source conditions in the high pressure evaporator EH,
That is, in the case of hot water, for example, once the hot water inlet temperature, hot water flow rate, etc. are determined, the temperature will be approximately constant.

Therefore, as shown in FIG. 1, the solution path forming the solution cycle is an intermediate concentration solution pipe 2 that leads the solution from the low pressure absorber AL to the high pressure absorber AH, and a dilute solution pipe 3 that leads the solution from the high pressure absorber AH to the generator G. and the concentrated solution pipe 5 leading from the generator G to the low pressure absorber AL, and if there are no other connections between each device and the solution pipe, the cooling water condition and heating source condition are constant. It is difficult to take measures such as lowering the water temperature, increasing the high-temperature water temperature, or improving efficiency, and the disadvantage is that the usage conditions are limited and the range of application is narrow.

The present invention enables solutions at appropriate temperatures and concentrations to be mixed or branched by appropriately connecting each device forming a solution cycle and each solution tube with a different concentration depending on the conditions of use. and concentration solution cycle is formed on the high pressure side and/or the low pressure side, thereby adapting it to the required usage conditions (cold heat source conditions, hot heat source conditions, i.e., required cold water temperature, required hot water temperature, etc.). The object is to provide a hybrid absorption heat pump which has a significantly wider range of possible applications.

Another object of the present invention is to use the heat obtained from the production of cold water in a refrigeration cycle including an absorber and an evaporator on the low pressure side to generate thermal energy for producing high temperature water in a heat pump cycle including an absorber and an evaporator on the high pressure side. The aim is to use it effectively as a

As a result, the amount of heat discharged to the cooling water in the condenser can be reduced, and the heating energy in the high-pressure side evaporator can be reduced.

Another object of the present invention is to mix the liquid between the low-pressure side cycle and the high-pressure side cycle of the absorption solution cycle at a location most suitable for the usage conditions, with the aim of providing a highly efficient, inexpensive, and economical device. It is also an object to provide a hybrid absorption heat pump which can be operated by means of connection at one or more points.

Another object of the present invention is to provide a solution circulation pump to the low-pressure absorber and generator, so that the low-pressure side cycle and the high-pressure side cycle of the absorption solution cycle can be formed into cycles most suitable for the above-mentioned usage conditions. The purpose is to provide an efficient, inexpensive, and economical device.

Another object of the present invention is to distribute the absorption solution from the generator to the low-pressure absorber and the high-pressure absorber, respectively, in the amount of solution most suitable for the above-mentioned usage conditions, thereby optimizing the low-pressure side and high-pressure side cycles. The purpose of this invention is to provide a highly efficient, inexpensive, and economical device by forming such a structure.

Another object of the present invention is to supply absorption solution from a high-pressure generator mainly to a low-pressure absorber to form a low-pressure side and high-pressure side cycle most suitable for the above-mentioned usage conditions, thereby achieving high efficiency, low cost, and economy. The purpose is to provide a device that can

The present invention provides an absorption heat pump having an absorber, a generator, an evaporator, a condenser, a dilute solution heat exchanger, and a fluid path that connects these. at least one stage of absorber and evaporator held at a high pressure and at least one stage of absorber and evaporator held at a pressure lower than said intermediate pressure; A heating medium such as cooling water is introduced into the condenser and a low-pressure absorber, and a cooling medium such as cooling water is introduced into the condenser and the low pressure absorber to generate a thermal energy source such as high-temperature water that is higher temperature than the heat source and higher than the cooling medium such as cooling water. The low-pressure absorber
, as a solution path connecting high pressure absorber AH and generator 0, (1) In the first invention, AL-+AH-+G
-+AL route and bypass route connecting parts with different concentrations (2) In the second invention, AL → G → AH - + G → A
L path (3) In the third invention, AL-+G-+AH→AL
This is a hybrid absorption heat pump characterized by having a path.

The above solution paths may partially use a common pipe line.

To explain the present invention in terms of an embodiment, in Fig. 3, G is a generator and C is a condenser, and although the pressure in generator G is slightly higher, it is maintained at approximately the same pressure (this is called intermediate pressure). .

AH is a high pressure absorber, AL is a high pressure evaporator and the pressure is higher than the intermediate pressure, AL is a low pressure absorber, and EL is a low pressure evaporator and the pressure is lower than the intermediate pressure.

Regarding the solution side cycle, the low pressure absorber AL is connected to the high pressure stage absorber AH via the solution pump 1 and intermediate concentration solution pipe 2, and the high pressure stage absorber AH is connected to the generator G via the dilute solution pipe 3 and valve 4.
The generator G is connected to the low pressure absorber AL via a concentrated solution pipe 5 and a valve 6.

Regarding the refrigerant side cycle, the low pressure evaporator EL is connected to the high pressure evaporator EH via a refrigerant pump 1, a refrigerant pipe 8, and valves 9 and 10.

Further, a branch pipe 12 having a valve 11 is connected to the refrigerant pipe 8 in order to circulate the refrigerant liquid in the low-pressure evaporator EL.

The condenser C and the low pressure evaporator EL have a pressure reducing valve 29 and a return pipe 30.
Connected by

High pressure absorber AH connects the solution side and refrigerant side
A steam pipe 13 connects the generator G and the condenser C, a steam pipe 14 connects the low pressure absorber AL and the low pressure evaporator EEL, and a steam pipe 15 connects the low pressure absorber AL and the low pressure evaporator EEL. .

Hot water pipe 1 as a heat source in relation to the exchange of heat with the outside
6.17 are respectively installed in the generator G1 and the high-pressure evaporator EH, and the inlet pipe 21 having a valve 19 and a branch to a three-way valve 20 is connected to the inlet part 18 of the hot water pipe 16, and the outlet part 22 is connected to the inlet pipe 21 having a valve 19 and a branch to a three-way valve 20. The three-way valve 20 is connected to the other three-way valve 2.
3 through a communication pipe 24.

One port of the three-way valve 23 is connected to the inlet section 26 of the hot water pipe 17, and the other port is connected to an outlet pipe 28 connected to the outlet section 27 and further connected to the heat exchanger Xs.

The condenser C and the low pressure absorber AL are equipped with a cooling water pipe 3L32 through which cooling water passes.

The outlet of the cooling water pipe 31 is connected to the heat exchanger Xw.

The high pressure absorber AH is equipped with a high temperature water pipe 33 for obtaining the required high temperature water, and the low pressure evaporator EL is equipped with a cold water pipe 34 for obtaining the required cold water.

Furthermore, in this embodiment, in order to adapt the solution cycle to the usage conditions, from the low pressure absorber AL to the high pressure absorber AH
intermediate concentration solution pipe 2 connected to the high pressure absorber AH, dilute solution pipe 3 connected from the high pressure absorber AH to the generator G, and from the generator G to the low pressure absorber A
A concentrated solution pipe 5 connected to L and a connecting pipe connected from the intermediate concentration solution path between the low pressure heat exchanger AL and the high pressure heat exchanger XH to the dilute solution path between the high pressure heat exchanger xH and the generator G. 49 are provided.

Regarding the control of high temperature water, a temperature detector 35 is provided at the outlet of the high temperature water pipe 33 and controls the valve 20 via the three-way valve 23 and the signal switch 25.

A temperature detector 36 is provided at the outlet of the cold water pipe 34 and controls the three-way valve 20 via a signal switch 25.

At 37.38, the liquid level detector detects valve 10 or valve 6, respectively.
control.

The refrigerant is heated by the heat exchangers Xs and Xw, and the efficiency is increased by effectively utilizing the heat.

To explain the operation and effect of this embodiment, in the heat source hot water system, waste water from a power plant, for example, is supplied from the outside to the inlet pipe 21, the valve 19 is opened, and the three-way valve 20 is closed on the inlet pipe 21 side and the outlet part is 22 and the communication pipe 24 are placed in communication with each other, and the three-way valve 23 is placed in a state where the communication pipe 24 and the inlet portion 26 are placed in communication with each other, and the heat source hot water passes through the hot water pipe 16, the communication pipe 24, and the hot water pipe 17. It is discharged to the outside from the outlet pipe 28.

Of course, it is also possible to supply hot water to the hot water pipes 16, 17 not in series but in parallel, or separately from separate hot water sources.

The refrigerant liquid in the low-pressure evaporator EL is supplied to the refrigerant pipe 8 by the refrigerant pump 7.
, enters the high-pressure evaporator EH via valves 9 and 10, is heated by hot water in the hot water pipe 17, evaporates, and enters the high-pressure absorber AH via the steam pipe 13.

On the other hand, the intermediate concentration solution is supplied from the low pressure absorber AL by the solution pump 1,
Intermediate concentration solution tube 2 passes through low pressure stage and high pressure stage heat exchanger x
It is heated through L and xH and enters the high-pressure stage absorber AH, where it absorbs the aforementioned refrigerant vapor.

At this time, the solution is heated by the absorbed heat to a temperature corresponding to an increase in the boiling point, heating the high temperature water pipe 33, and high temperature water having a higher temperature than the heat source hot water can be obtained.

The dilute solution that has absorbed the refrigerant enters the generator G through the dilute solution pipe 3 and the valve, and is heated by hot water in the hot water pipe 16 to generate steam and concentrate, and the concentrated solution is passed through the dilute solution pipe 5, The liquid enters the low-pressure stage absorber AL through the valve 6, is cooled by the cooling water in the cooling water pipe 32, and is sent to the solution pump 1 again.

A portion of the solution in the intermediate concentration solution tube 2 passes through the connecting tube 49 and joins the dilute solution in the dilute solution tube 3.

At this time, the valve s is attached to the connecting pipe 49 and the intermediate concentration solution pipe 2.
It is also possible to provide each of o and si to facilitate adjustment of flow rate distribution suitable for usage conditions.

The solution cycle is repeated as described above.

On the other hand, the refrigerant vapor generated in the generator G passes through the steam pipe 14 to the condenser C, is cooled and condensed by the cooling water in the cooling water pipe 31, and enters the low pressure evaporator EL through the return pipe 30 and the pressure reducing valve 29, and enters the cold water pipe 34. Part of the vapor is evaporated by the heat of the cold water, and the vapor enters the low pressure stage absorber AL through the steam pipe 15 and is absorbed into the solution.

The cold water in the cold water pipe 34 is heated by the evaporation of the refrigerant and becomes low temperature, and cold water at a lower temperature than the cooling water can be obtained from the outlet.

Some of the refrigerant sent by the refrigerant pump 7 is transferred to the branch pipe 1
2 and returns to the low pressure stage evaporator EL again to promote evaporation.

If there is a load fluctuation or other thermal fluctuation, it is detected by the temperature detector 35, 36 installed at the output end, and the three-way valve 20
．． 23 to control the heat source hot water passing through hot water pipes 16 and 17 to maintain the temperatures of hot water and cold water at required values.

In order to obtain high-temperature water and cold water at the same time as in this embodiment, a conventional device would require separate devices for the combination of AH, EH, G, and C and devices for the combination of G, C, AL, and EL. However, in this embodiment, G and C are common and are integrated, so the structure is very simple, and the high temperature water, which is higher in temperature than the heat source hot water and has high utility value, can be used at a temperature lower than the cooling water. It is possible to generate cold water at the same time, or to generate either high temperature water or cold water as needed, and it is possible to effectively utilize both hot and cold water.

When only cold water is generated, the signal switch is switched from 36 to 20, valve 9 is closed, and valve 23 blocks the flow to hot water pipe 17 and short-circuits the outlet pipe to allow hot water to flow.

If only high temperature water is generated, the signal switch 25 should be 35-20.
, valve 9 is closed, and three-way valve 20.23 is switched to hot water pipe 16.
Make use of the circuit that allows water to flow through 17.

Moreover, in this embodiment, the main points of the solution cycle are as shown in FIG.
Intermediate concentration solution pipe 2 and dilute solution pipe 3 connecting between H1 generator G1 and low pressure absorber AL. In addition to having the concentrated solution tube 5, by having a connecting tube 49 connecting the intermediate concentration solution tube 2 to the dilute solution tube 3 between the low pressure heat exchanger xL and the high pressure heat exchanger xH as a bypass path, the connecting tube 49 Compared to the case where there is no intermediate concentration solution, a part of the intermediate concentration solution flowing to the high pressure cycle is branched, so the circulation volume of the high pressure cycle is reduced, improving the efficiency on the high pressure side, and the circulation volume of the low pressure cycle is increased, so the concentration range is widened. The narrowing reduces the temperature in the low pressure absorber AL and therefore the temperature in the low pressure evaporator, making it possible to obtain cold water at a lower temperature.

A solution cycle diagram of this example is shown in FIG.

The two-dot chain line in the figure shows a cycle diagram when the connecting pipe 49 is not used.

One or both ends of the bypass path may be connected inside the high-pressure heat exchanger or the low-pressure heat exchanger, but
This case is also included in the above examples and the following examples.

In the embodiment shown in FIG. 4 above to the embodiment shown in FIG. and a solution path connecting from the generator to the low pressure absorber, an embodiment in which the bypass path is a bypass path connecting between solution paths of solutions of different concentrations or between a solution path and an operating device.

The alternative embodiment of FIG. 5 is similar to that of FIG. 4, but
Bypass path connects low pressure heat exchanger xL and high pressure heat exchanger xH
This is the case when the connecting pipe 49 directly connects the intermediate concentration solution pipe 2 to the generator G.

A cycle diagram is shown in FIG. 5, which has the same effect as the one in FIG. 4, but has the added advantage that the resistance loss of the solution entering the generator in the high-pressure side cycle is reduced, making circulation easier.

FIG. 6 shows another embodiment in which the bypass path is a connecting pipe 49 connecting the medium concentration solution pipe 2 to the dilute solution pipe 3 between the high pressure heat exchanger xH and the high pressure absorber AH.

FIG. 7 shows another embodiment, which shows the same effect as the example in FIG. A case is shown in which the connection pipe 49 connects the concentrated solution pipe 5 to the low pressure heat exchanger xL.

Since the concentration on the low-pressure cycle side is lowered on the high-concentration side, it can be separated from the crystal line K, which is effective in preventing crystals in the solution cycle.

Connect the tip of the connecting pipe 49 to the low temperature heat exchanger xL and the low temperature absorber AL.
It may also be connected to the concentrated solution tube 5 between the two.

Figure 8 shows an example of the combined use of Figures 4 and 7, with connecting pipe 4.
9 and 49', and has the effects of both.

FIG. 9 shows another embodiment in which the bypass path runs from the concentrated solution tube 5 between the generator G and the low temperature absorber AL to the low pressure heat exchanger
In the case where the connecting pipe 49 is connected to the intermediate concentration solution pipe 2 between L and the high pressure heat exchanger xH via the ejector 50,
Since the high-pressure side cycle is shifted to the high-concentration side, high-temperature water can be obtained.

FIG. 10 shows another embodiment in which the bypass path runs from the concentrated solution pipe 5 between the low pressure heat exchanger xL and the low pressure absorber G to the intermediate concentration solution between the solution pump 1 and the low pressure heat exchanger xL. tube 2
In this case, the connection pipe 49 is connected via the hegejector 50, and the same effect as in FIG. 9 is obtained.

Note that when the tip of the connecting pipe 49 is connected between the low temperature generator AI and the solution pump 1, the ejector 50 is not necessary, but cavitation countermeasures are required.

11 to 15 show that the inter-equipment solution path is a solution path connecting from the low pressure absorber AL to the generator via the pump;
An embodiment of the solution path connecting from the generator G to the high pressure absorber AH via a pump, the solution path connecting from the high pressure absorber AH to the generator G, and the solution path connecting from the generator G to the low pressure absorber. be.

FIG. 11 shows an embodiment without a bypass path.

Since the highly concentrated solution can be sent directly from the generator G to the high pressure absorber AH, compared to the examples shown in FIGS. 4 to 10, relatively high temperature water can be obtained for the heating medium at the same temperature.

41 is a concentrated solution tube. FIG. 12 shows that the solution path connecting from the low-pressure absorber AL to the generator G via pump 1 and the solution path connecting from the high-pressure absorber AH to the generator G merge before entering the generator G. This is an example of what is happening.

In addition to having the same effect as the one in FIG. 11, even if the capacity of the high-pressure heat exchanger xH is small, the solution in the high-pressure side cycle is prevented from flashing in the generator G, thereby preventing heat loss.

FIG. 13 shows that the bypass path is further connected to the low pressure heat exchanger xL.
A connecting pipe 4 connecting from the intermediate concentration solution pipe 2 between the generator G and the generator G to the concentrated solution pipe 41 between the generator G and the high pressure heat exchanger xH.
9, in addition to having the same effect as the previous example, the amount of solution circulated in the high-pressure absorber AH increases, so that a sufficient amount of spraying can be obtained in the high-pressure absorber AH.

Note that a connecting pipe 49 similar to that shown in this figure can also be used in the embodiment shown in FIG.

Figure 14 shows that the connecting pipe 49 of the bypass route is connected to the high pressure heat exchanger
This is an example in which the high-pressure absorber is reached through H, and has the same effect as the example in the previous section.

FIG. 15 shows an embodiment similar to FIG. 11, but in which the concentrated solution tubes 5 and 41 are branched after the discharge port of the pump 39.

It has an effect similar to that of FIG. 11 and can assist the circulation from the generator G to the low pressure absorber AL.

Figures 16 to 18 show the solution paths between devices: a solution path connecting from the low-pressure absorber to the generator via the pump, a solution path connecting from the generator to the high-pressure absorber via the pump, and a solution path connecting from the high-pressure absorber to the high-pressure absorber. Figure 3 is an example of a solution path connecting to a low pressure absorber.

Figure 16 shows an example without a bypass path. Since the low-pressure side cycle is away from the crystalline line K of the solution, crystallization can be easily prevented. Therefore, the high-pressure side cycle should also be considered to be close to the crystalline line of the low-pressure side cycle. Since the water is collected without causing any damage, it is possible to obtain relatively high-temperature water, and there are also effects such as less flash loss.

40 is a dilute solution tube, and 45 is an intermediate concentration solution tube.

FIG. 17 shows a connecting pipe 49 in which the bypass path connects the dilute solution pipe 40 between the low temperature heat exchanger xL and the generator G to the concentrated solution pipe 43 between the generator G and the high pressure heat exchanger xH. This is an example of something that is.

It has the same effect as the upper side, but also has the advantage that the amount of solution circulated in the high-pressure absorber AH increases and the amount of spraying can be sufficient.

Note that the connecting pipe 49 may be led to the high-pressure absorber AH via the high-pressure heat exchanger xH as shown in FIG.

FIG. 18 shows an embodiment in which the bypass path is a connecting pipe 49 connecting a concentrated solution pipe 43 to an intermediate solution pipe 45 between the generator G and the high-pressure heat exchanger xH.

In addition to having the same effect as the previous example, since the concentration in the low pressure absorber AL can be brought to the high concentration side, relatively low temperature cold water can be obtained.

Although the positions of the bypass paths are illustrated in the various embodiments described above, the present invention is not limited thereto, and includes connecting two different points during the solution cycle with any bypass path. This makes it possible to adjust the concentration by mixing solutions of different concentrations, to adjust the pressure and temperature, to increase the flow rate, or to reduce the flow rate by branching.

Also, in order to facilitate adjustment, a valve can be provided as in the embodiment shown in FIG.

Further, in the above example, a single-stage absorber and evaporator are shown on both the high-pressure side and the low-pressure side, but both can be made into multiple stages.

According to the present invention, the concentration, temperature, and flow rate of the solution at each part during the solution cycle are selected to appropriate values, and thereby the temperature, flow rate, and temperature, flow rate, and pressure of the refrigerant vapor are also adjusted. Based on the conditions (temperature, flow rate, etc.), heating source conditions (temperature, flow rate, etc.), select the appropriate solution cycle to obtain the required output conditions, such as the required temperature and flow rate of hot water or cold water. By forming the present invention, it is possible to provide a hybrid type absorption heat pump which has an extremely wide range of application, and has an extremely effective effect in practical use.

[Brief explanation of the drawing]

Figure 1 shows a flow sheet of a conventional example, Figure 2 shows its solution cycle diagram, Figures 3 to 18 show examples of the present invention, Figure 3 is a flow sheet, and Figures 4 to 18 1 and 2 show solution cycles of different embodiments of the present invention, respectively, a shows a flow sheet, and b shows a cycle diagram. G... Generator, C... Condenser, AH.
...High pressure absorber, AL...Low pressure absorber,
EH...High pressure evaporator, EL...Low pressure evaporator, XH...High pressure heat exchanger, xL...
・Low pressure heat exchanger, Xs, Xw...Heat exchanger, K
...Crystal line, Mloo... Refrigerant 100
% line, 1°39...Solution pump, 2,45...
...Intermediate concentration solution tube, 3,40,44...
Dilute solution tube, 4,6,9°10.11,19,46...
... Valve, 5, 41, 43... Concentrated solution tube, 7.
... Refrigerant pump, 8 ... Refrigerant pipe, 12.
...Branch pipe, 13,14,15...Steam pipe, 16.17...Hot water pipe, 18.26...
...Inlet section, 20.23...Three-way valve, 21.
...Inlet pipe, 22゜27 ...Outlet part, 2
4...Connection pipe, 25...Signal switch,
28... Outlet pipe, 29... Pressure reducing valve, 3
0...Return pipe, 31.32...Cooling water pipe, 33...High temperature water pipe, 34...Cold water pipe, 35, 36...・Temperature detector, 37.38
...Liquid level detector, 47, 48...Heat transfer tube, 49...Connection pipe, 50...Ejector, 51, 52... ·valve.

Claims (1)

[Claims] 1. In an absorption heat pump having an absorber, a generator, an evaporator, a condenser, a dilute solution heat exchanger, and a fluid path connecting these, the generator and the condenser are maintained at an intermediate pressure. ,
at least one stage of absorber and evaporator held at a pressure higher than said intermediate pressure, and at least one stage of absorber and evaporator held at a pressure lower than said intermediate pressure; A heating medium such as hot water is introduced into the condenser and a low-pressure stage absorber, and a cooling medium such as cooling water is introduced into the condenser and low-pressure stage absorber.
Generating a thermal energy source such as high-temperature water with a higher temperature than the heat source and generating a cold heat source such as cold water with a lower temperature than a cooling medium such as cooling water at the same time or generating either one of them as necessary. and the following (AI)
, (Bl), (CI), and (Dl) solution paths. (AI) Solution path connecting the low pressure absorber to the high pressure absorber via the pump (B1) Solution path connecting the high pressure absorber to the generator (C
1) Solution path (Dl) connecting the generator to the low pressure absorber
Bypass path 2 connecting parts of the above devices or solution paths with mutually different concentrations In an absorption heat pump having an absorber, a generator, an evaporator, a condenser, a dilute solution heat exchanger, and a fluid path connecting these , maintaining the generator and condenser at intermediate pressure;
at least one stage of absorber and evaporator held at a pressure higher than said intermediate pressure, and at least one stage of absorber and evaporator held at a pressure lower than said intermediate pressure; A heating medium such as hot water is introduced into the condenser and a low-pressure stage absorber, and a cooling medium such as cooling water is introduced into the condenser and low-pressure stage absorber.
Generating a thermal energy source such as high-temperature water with a higher temperature than the heat source and generating a cold heat source such as cold water with a lower temperature than a cooling medium such as cooling water at the same time or generating either one of them as necessary. and the following (A2):
A hybrid absorption heat pump characterized by comprising solution paths (B2), (C2), and (B2). (A2) Solution path connecting from the low pressure absorber to the generator via the pump (B2) Solution path connecting from the generator to the high pressure absorber via the pump (C2) Solution path connecting from the high pressure absorber to the generator (B
2) Solution path 3 connecting the generator to the low-pressure absorber In an absorption heat pump that has an absorber, a generator, an evaporator, a condenser, a dilute solution heat exchanger, and a fluid path connecting these, and at least one stage of absorber and evaporator held at a pressure higher than said intermediate pressure, and at least one stage of absorber and evaporator held at a pressure lower than said intermediate pressure, A heating medium such as hot water is introduced as a heat source to the condenser and the high-pressure stage evaporator, and a cooling medium such as cooling water is introduced to the condenser and the low-pressure stage absorber. generation and the generation of a cold source such as cold water at a lower temperature than the cooling medium such as cooling water at the same time or as necessary, or one of them can be generated, and the following (A3), ( B3
) and (C3). (A3) Solution path connecting from the low pressure absorber to the generator via the pump (B3) Solution path connecting from the generator to the high pressure absorber via the pump (C3) Solution path connecting from the high pressure absorber to the low pressure absorber course