JPS6315049A - Absorption heat pump type heat accumulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat storage device using an absorption heat pump.

2. Description of the Related Art Conventionally, a method is known in which the sensible heat of water is utilized as a heat storage device that can be used both for heating purposes such as heating and for cooling purposes and decreasing temperatures.

Recently, ice heat storage, liquid ice heat storage, etc. have been developed.

Problems to be Solved by the Invention As mentioned above, the conventional heat storage device for heating and cooling uses the sensible heat of water, so in practice it is necessary to have an extremely large installation capacity, which reduces equipment costs, etc. increases. In addition, ice heat storage and liquid ice heat storage utilize the latent heat of ice, but they cannot be used to store heat for heating purposes.

The present invention aims to provide a heat storage device that uses an absorption heat pump and can be extremely miniaturized for both heating and cooling.

Means for Solving the Problems The absorption heat pump type heat storage device of the present invention is an absorption heat pump equipped with a regeneration/absorption chamber and a condensation/evaporation chamber that exchanges heat under vacuum conditions with a liquid that has exchanged heat with an external heat source. The heat exchanger tube in each of the chambers and the heat exchanger of each external heat source are characterized in that a circulation pipe for a heat transfer liquid is communicated through a switching valve.

Effect In the above configuration, by switching the switching valve of the circulation pipe for the heat transfer liquid, heat can be stored in the absorption heat pump and radiated for raising or lowering the temperature. In other words, the heat transfer liquid heated by exchanging heat with a heat source or heated waste liquid during times when there is no load such as cooling or heating is guided to the heat transfer tube in the regeneration/absorption chamber of the absorption heat pump, and the refrigerant solution is The refrigerant vapor from the regeneration and absorption chamber is condensed in the condensation and evaporation chamber, and the heat is dissipated to the outside by the heat transfer liquid circulating in the pipes. When dissipating heat for heating purposes such as heating, the refrigerant is heated by the heat transfer liquid circulating in the pipes, which has been exchanged with an external heat source (low-temperature heat source) in the condensation/evaporation chamber, and the generated vapor is regenerated. The heat is guided to the absorption chamber and absorbed by the refrigerant solution, and the generated heat heats the heat transfer liquid circulating in the pipes, which exchanges heat with the lifting load. Also, when dissipating heat for cooling etc.,
The liquid whose temperature rises due to the temperature-lowering load is cooled by absorbing heat through the evaporation of the refrigerant in the condensing/evaporation chamber, and then circulated between the temperature-lowering load and the evaporated refrigerant is absorbed into the refrigerant solution in the regeneration/absorption chamber. The heat generated is radiated to the outside by a heat transfer liquid that circulates through the pipes.

Example An embodiment of the present invention will be described based on the drawings.

In Fig. 1, 1 is an absorption heat pump, and the main body 2
has a sealed structure, and a refrigerant solution 4 is stored in the lower part of the main body as a refrigerant solution storage tank 3, and the upper space of the refrigerant solution 4 is divided into two by an upright partition wall 5.

A steam communication hole 6 is provided in the spacer ri5.

Note that the space above the refrigerant solution 4 is kept in a vacuum state by a vacuum pump 7. A spraying device 10 that sprays the refrigerant solution 4 to the upper part of the first chamber 8 of the first chamber 8 and the second chamber 9 formed by the partition wall 5;
A refrigerant solution circulation pipe is formed between the refrigerant solution storage tank 3 and the lower part of the refrigerant solution storage tank 3 via a solution pump 11 . Further, a spraying device 13 that sprays the refrigerant 12 on the upper part of the second chamber 9
, and a refrigerant storage tank 14 is provided in the lower part, and a refrigerant circulation pipe is formed between the distribution device 13 and the refrigerant storage tank 14 via a refrigerant pump 15 . Further, in the first chamber 8, a heat transfer tube 16 is disposed between the spraying device 10 and the liquid level of the refrigerant solution 4. Between this heat exchanger tube 16 and a heat exchanger 17 that receives and receives heat from an external heat source, there is a circulation pump 18, a ladder 19 for supplying to the external load (L), and a ladder 20 for returning, for heat transfer. A liquid circulation pipe 21 is formed. Further, in the second chamber 9, a heat transfer tube 22 is disposed between the dispersion device 13 and the refrigerant storage tank 14. A circulation pipe 25 for a heat transfer liquid is formed via a circulation pump 24 between the heat transfer tube 22 and a heat exchanger 23 that receives and receives heat from an external heat source.

Furthermore, switching valves 26, 27, and 28 are disposed in order from the circulation pump 18 side on the circulation pipe 21 on the suction side of the circulation pump 18 and between the circulation pipe 21 and the heat transfer tube 16 in the first chamber 8.

Then, an external load (
A return line 29 of a liquid for heat transfer from L) is connected,
A communication pipe 3° is provided between the switching valve 27 and the return header 20, and a communication pipe 3° is provided between the switching valve 28 and the circulation pipe 25 on the suction side of the circulation pump 24 [between the heat transfer tube 22 and the heat exchanger 23 in the second chamber 9]. A communication pipe 32 is provided between the switching valve 31 and the switching valve 31 disposed between the two. Further, a switching valve 33 is disposed between the heat transfer tube 16 and the heat exchanger 19 in the circulation pipe line 21 .

A switching valve 34 is provided on the delivery side of the circulation pump 24 of the circulation pipe 25, and a communication pipe 35 is provided between the switching valve 33 and the switching valve 34. Further, in the circulation pipe line 25, a switching valve 36 is provided between the heat transfer pipe 22 and the switching valve 31, a communication pipe 37 is provided between the switching valve 36 and the supply header 19, and a communication pipe 37 is provided between the heat transfer pipe 22 and the switching valve 31. A switching valve 38 is provided between the switching valve 34 and the switching valve 34, and a communication pipe 39 is provided between the return header 20 and the switching valve 34.

Reference numeral 40 denotes an external heat source that exchanges heat with a heat transfer liquid in the heat exchanger 17. In this embodiment, since the external load (L) is air conditioning, a compression heat pump is used. That is, the compressor 41. A condenser/evaporator 42 that exchanges heat with a heat exchanger 17. It is composed of an evaporator/condenser 43, a refrigerant pipe 44, and a four-way valve 45.

The operation of the heat storage device configured as described above will be explained. In the absorption heat pump 1, the refrigerant-absorbent system is generally a water-lithium bromide system, and water is usually used as the heat transfer liquid. The external load (L) is air conditioning.

(i) Heat storage (see FIG. 1) The compression heat pump of the external heat source 40 is operated, for example, using nighttime electricity, and the heat generated in the condenser/evaporator 42 is used to store the heat transfer liquid (hereinafter referred to as The heated water is circulated in the circulation pipe 21 and radiates heat in the heat transfer tube 16 in the first chamber (regeneration and absorption chamber) 8 of the absorption heat pump 1.

Then, in the first chamber 8, the refrigerant solution is sprayed by the spraying device 1o, and the refrigerant solution is heated by the heat transfer tube 16 to evaporate and concentrate the water that is the refrigerant, and the generated water vapor is The vapor enters the second chamber (condensing and evaporating chamber) 9 through the vapor distribution hole 6 provided in the tube 5, and is cooled and condensed by the heat transfer tube 22. On the other hand, the heat transfer liquid is heated in the heat transfer tube 22, passes through the circulation pipe 25, is cooled by dissipating the heat to the outside in the heat exchanger 23, and is sent to the heat transfer tube 22 by the circulation pump 24. Through a series of six or more circulating operations, the refrigerant solution is concentrated and heat is stored in the absorption heat pump 1'.

(ii) Heating (elevating load) (see Figure 2) In the heating load, for example, for the basic load, energy from the external heat source 40, that is, heat generated by condensation in the condenser/evaporator 42, Hot water is created in the heat exchanger 17 and circulated to the load by switching the switching valve 26 to cope with the increase, and at the peak of the load, the thermal energy stored in the heat storage device is released as follows. You can respond accordingly. That is, if the water circulating in the circulation pipe 25 is heated by exchanging heat with an external heat source (for example, waste heat) by the heat exchanger 23, the second chamber (!i compression and evaporation chamber) 9 of the absorption heat pump 1 is heated. The refrigerant sprayed from the dispersion device 13 via the refrigerant pump 15 is heated by the heat transfer tube 22 inside and continues to evaporate, and the vapor passes through the vapor distribution hole 6 of the partition wall 5 to the first chamber (regeneration and absorption chamber) 8. The water in the heat exchanger tubes 16 is absorbed by the refrigerant solution being sprayed from the spraying device 10 via the solution pump 11, and the water in the heat transfer tubes 16 is heated by the vapor latent heat released at this time. Then, the water heated in the heat transfer tube I6 is connected to the return header through the communication pipe 3o by switching the switching valve 27 of the circulation pipe 21, and then connected to the pipe line formed by the external load (L). It circulates and releases heat (heating) at the external load (L).

(iii) Cooling (temperature-dropping load) (see Figure 3) For the cooling load, as in the case of the heating load, for the basic load, the four-way valve 45 is switched using the energy from the external heat source 4o. By absorbing heat due to evaporation in the condenser/evaporator 42, cold water is created in the heat exchanger 17 and circulated to cope with the increase, and the thermal energy stored in the heat storage device is used for the increased amount at the peak of the load. You can respond by emitting the following: That is, switching valves 36 and 38
, the cold water is circulated between the heat transfer tube 22 in the second chamber (condensation and evaporation chamber) 9 of the absorption heat pump 1, the communication tube 37, 39, the supply ladder 19, the return header 20, and the external load (L). form a system. Also, switching valves 28, 33 and 3
1.34, a hot water circulation path is formed between the heat exchanger tube 16 in the first chamber (regeneration/absorption chamber) 8, the communication tube 32.35, the heat exchanger 23, and the circulation pump 24. In the second chamber 9, when return water from the external load (L) is circulated into the heat transfer tubes 22 through the cold water circulation path, the refrigerant sprayed from the spraying device 13 via the refrigerant pump 15 absorbs heat and continues to evaporate. The feed water in the cold water circulation system is cooled by the heat absorption and sent to the external load (L). The water vapor evaporated in the second chamber (condensation and evaporation chamber) 9 flows through the vapor flow holes 6 of the partition wall 5.
It enters the first chamber (regeneration and absorption chamber) 8 through the solution pump 11 and is absorbed by the refrigerant solution being sprayed from the spraying device 10, and the heat released at this time is communicated to the heat transfer tube 16. The heat is transmitted by the water circulating in the hot water circulation system, and is discharged to the outside by the heat exchanger 23.

The above device stores heat using the absorption heat pump 1,
By simply operating the switching valve, it can be used for heating (temperature increasing load) and cooling (temperature decreasing load).

Since the above device utilizes the latent heat of the refrigerant (water) vapor under vacuum conditions, the latent heat is also large and the entire device can be downsized.

Next, in the heat storage device having the configuration of the above embodiment, LOGc
The various conditions for obtaining the thermal storage heat amount of aQ are as shown in Tables 1 and 2, and the cases of other heat storage devices are shown in Table 3 for comparison.

(Left below) (c) Table 3 of other heat storage devices As is clear from Table 2 above, when a heat storage device used for cooling and heating has a heat storage capacity of 100 calL, the total capacity of the dilute refrigerant solution and refrigerant is 100 calL. ~130 i is sufficient, but as shown in Table 3, conventional heat storage devices require a capacity of 2000 r1'' for cold water and hot water, and 250 to 400 r1'' for liquid ice.
n'', and the heat storage device according to the present invention can be much smaller than conventional devices.

Effects of the Invention In the absorption heat pump heat storage device of the present invention, the absorption heat pump operates under vacuum conditions.

The heat transfer liquid circulation pipes between the heat exchanger tubes in the regeneration/absorption chamber and the condensation/evaporation chamber and the heat exchanger that exchanges heat with an external heat source are communicated with each other via switching valves. By switching the switching valve as necessary, heat storage, heat radiation for temperature increase (heating), and heat radiation for temperature decrease (cooling) can be easily performed, and the latent heat of vaporization of the available refrigerant is large.
The entire device can be made much smaller than conventional devices.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing the overall configuration of one embodiment of the device of the present invention and how it is used during heat storage, and FIG.
FIG. 3 is a schematic configuration diagram showing how the device shown in FIG. 1 is used during heating, and FIG. 3 is a schematic configuration diagram showing how the device shown in FIG. 1 is used during cooling. 1... Absorption heat pump, 3... Refrigerant solution storage tank, 5
...Partition wall, 6...Steam flow hole, 7...Vacuum pump, 8...1st chamber (regeneration and absorption chamber), 9...2nd chamber (
condensation and evaporation chamber), 16.22...heat exchanger tube, 17.2
3... Heat exchanger, 18° 24... Circulation pump, 21
．． 25...Circulation pipe, 26.27.2g. 31, 33.34.36.3g...Switching valve, 30.3
2.35.37゜39...Communication pipe

Claims (1)

[Claims] 1. A heat exchanger between the heat exchanger tubes in each chamber and each external heat source of an absorption heat pump equipped with a regeneration/absorption chamber and a condensation/evaporation chamber that exchanges heat under vacuum conditions with a liquid that has exchanged heat with an external heat source. An absorption heat pump type heat storage device, characterized in that a circulation pipe for a heat transfer liquid between the two is connected through a switching valve.