Adsorption heat pump system

Abstract

To increase an amount of heat storage that works with double effect to more efficiently generate cold heat, in a double-effect adsorption type heat pump system.SOLUTION: An adsorption heat pump system comprises: an evaporator for evaporating an adsorbate; a first adsorber that adsorbs the adsorbate from the evaporator; two or more second adsorbers that adsorb the adsorbate adsorbed from the first adsorber; a recovery path connecting the two or more second adsorbers together and provided with a recovery valve in the middle; and a condenser that adsorbs the adsorbate from the second adsorber having adsorbed the adsorbate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adsorption heat pump system. [Background technology]

[0002] Patent Document 1 describes an adsorption heat pump that includes an evaporator, an adsorber, and a heat-storage reactor. The heat-storage reactor stores heat, and releases heat equal to or greater than the latent heat of vaporization of the heat medium to the adsorber, thereby regenerating the adsorber by applying heat equal to or greater than the regeneration temperature.

[0003] Furthermore, Patent Document 2 discloses a double-effect adsorption heat pump system having an evaporator that evaporates an adsorbate, a first adsorbent that adsorbs the adsorbate in the evaporator and generates cold energy in the evaporator, and a second adsorbent that adsorbs the adsorbate adsorbed in the first adsorbent and generates cold energy in the first adsorbent.

[0004] On the other hand, Patent Document 3 discloses a configuration in which an adsorption heat pump has an adsorbent housed inside a reactor, and multiple flow paths are formed in the adsorbent, each of which has a lower gas diffusion resistance than the adsorbent, and the multiple flow paths include multiple first flow paths aligned in a first direction and multiple second flow paths aligned in a second direction intersecting the first direction. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-40959 [Patent Document 2] Japanese Patent Application Publication No. 2016-011822 [Patent Document 3] Japanese Patent Publication No. 2021-152438 Summary of the Invention [Problem to be solved by the invention]

[0006] In a double-effect adsorption heat pump system such as that disclosed in Patent Document 2, the second adsorber, which further adsorbs the adsorbate adsorbed in the first adsorber, needs to perform adsorption at a pressure that is about one-tenth of that in the case of a single-effect system, and therefore the development of an adsorbent suitable for this has been desired.

[0007] An object of the present disclosure is to provide an adsorbent having a structure suitable for the use conditions of a second adsorber that performs adsorption in the second stage of the double effect in a double-effect adsorption heat pump system. [Means for solving the problem]

[0008] An adsorption heat pump system according to an embodiment of the present disclosure is an adsorption heat pump system having an evaporator that evaporates an adsorbate, a first adsorbent that adsorbs the adsorbate from the evaporator, a second adsorbent that adsorbs the adsorbate adsorbed from the first adsorbent, and a condenser that adsorbs the adsorbate from the second adsorbent that has adsorbed the adsorbate, wherein the first adsorbent has an adsorption layer formed by stacking the adsorbent in a mesh-like pattern in multiple stages on the outer periphery of a heat transfer tube through which a heat medium flows, and the adsorbents in the same stage are arranged parallel to each other with gaps between them in the same direction, while the adsorbents in adjacent stages are arranged in different directions from each other.

[0009] The adsorption heat pump system preferably includes two or more second adsorption devices, and a recovery path that connects the two or more second adsorption devices and has a recovery valve installed midway.

[0010] In this adsorption heat pump system, the first adsorbent adsorbs the adsorbate in the evaporator, and the adsorbate evaporates in the evaporator to generate cold.

[0011] The second adsorber adsorbs the adsorbate adsorbed in the first adsorber. That is, the first adsorber is depressurized. The adsorbate evaporates in the first adsorber, and a portion of the adsorbent in the first adsorber is regenerated. Then, the first adsorber generates cold energy, and the evaporated adsorbate is adsorbed in the second adsorber.

[0012] That is, in this adsorption heat pump system, cold can be generated using the desorption energy generated when the adsorbate is desorbed during regeneration of the first adsorption device, which allows for more efficient cold generation than in a system that does not use this desorption energy for cold generation.

[0013] The condenser regenerates the adsorbent in the second adsorber by adsorbing the adsorbate adsorbed in the second adsorber.

[0014] When two or more second adsorbers are provided, these two or more second adsorbers are connected to each other by a recovery line, which allows the adsorbate to be transferred between the second adsorbers. For example, when one second adsorber is being regenerated, the other second adsorber, which is adsorbing the adsorbate from the first adsorber, can adsorb the adsorbate through the recovery line with the recovery valve open. This enables more complete regeneration of the second adsorbers, increases the amount of heat stored in the double effect at the operating point of the adsorbent in the second adsorber, and enables more efficient cold generation.

[0015] Furthermore, the adsorbents are stacked in a network of multiple layers, with the adsorbents in the same layer arranged parallel to one another in the same direction, while the adsorbents in adjacent layers are arranged in different directions, providing flow paths between the adsorbents that act as adsorbate migration paths. These flow paths reduce the adsorbate migration resistance, so that increasing the thickness of the adsorption layer does not result in an increase in thermal resistance.

[0016] In addition to the above-described configuration, the adsorption heat pump system according to the embodiment of the present disclosure further comprises: 2.3≦w≦3.5 and The thickness H (mm) of the adsorption layer 10≦H≦15 It is desirable that:

[0017] In the second adsorber constructed with such an adsorbent, the average cold power output (VCP) was approximately 37.5 kW / m 3 That's all.

[0018] The wire diameter w (mm) of the adsorbent is 2.7≦w≦3.5 and The thickness H (mm) of the adsorption layer 10.7≦H≦14.3 It is even more desirable that:

[0019] In the second adsorber constructed with such an adsorbent, the average cold power output (VCP) was approximately 40.0 kW / m 3 That's all.

[0020] Furthermore, the wire diameter w (mm) of the adsorbent 3.1≦w≦3.5 and The thickness H (mm) of the adsorption layer 10.9≦H≦13.2 It is even more desirable that:

[0021] In the second adsorber constructed with such an adsorbent, the average cold power output (VCP) was approximately 42.5 kW / m 3 That's all.

[0022] In the above relational expression, the relationship between the adsorbent wire diameter w and the adsorption layer thickness H is as follows: H=nw (where n is a natural number greater than or equal to 2) That is, an adsorption layer with a thickness of H is formed by stacking n layers of adsorption material with a wire diameter of w.

[0023] When the wire diameter w of the adsorbent and the thickness H of the adsorption layer satisfy the above-described relationship, in a second adsorption device having such an adsorption layer, when adsorbing an adsorbate under a relatively low-pressure condition, for example, a pressure of 2 kPa or less, the amount of heat stored in the adsorbent increases and the average cold output increases.

[0024] In addition to the above-described configuration, the embodiment of the present disclosure also preferably has a gap between adjacent adsorbents of 500 μm or less. By setting the gap between adsorbents to 500 μm or less, a path for the gaseous adsorbate to move within the adsorption layer can be secured, thereby improving the utilization of the adsorbent not only on the surface but also inside the adsorption layer. The lower limit of the gap between the adsorbent tubes is not particularly limited as long as it is greater than 0 μm, but from the viewpoint of ensuring the movement of the adsorbate, it is preferable that it be 50 μm or more. [Effects of the Invention]

[0025] Since the embodiments of the present disclosure are configured as described above, it is possible to provide an adsorbent having a structure suitable for the usage conditions of a second adsorbent that performs adsorption in the second stage of a double-effect type adsorbent. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic diagram illustrating a configuration of an adsorption heat pump system according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a schematic diagram showing the structure of an adsorbent. [Figure 3] FIG. 2 is a schematic diagram showing the detailed structure of an adsorption layer. [Figure 4] 2 is a schematic diagram showing a cold heat generation state in an evaporator and a regeneration state of the other second adsorption device in the configuration of FIG. 1. FIG. [Figure 5] 2 is a schematic diagram showing a cold heat generation state in a first adsorption device and a regeneration state in a second adsorption device in the configuration of FIG. 1. FIG. [Figure 6] 2 is a schematic diagram showing the state of adsorption of an adsorbate from one second adsorption device by the other second adsorption device in the configuration of FIG. 1. FIG. [Figure 7] 2 is a schematic diagram showing a state in which cold is generated in an evaporator and a state in which one of the second adsorption devices is regenerated in the configuration of FIG. 1. FIG. [Figure 8] 2 is a schematic diagram showing a cold heat generation state in a first adsorption device and a regeneration state in one of the second adsorption devices in the configuration of FIG. 1. FIG. [Figure 9]2 is a schematic diagram showing the state of adsorption of an adsorbate from one second adsorption device by the other second adsorption device in the configuration of FIG. 1. FIG. [Figure 10] FIG. 2 is a pT diagram showing the operation of the adsorption heat pump system according to the first embodiment of the present disclosure. [Figure 11] 10 is a graph comparing the cold heat generation output of an adsorption heat pump system according to the first embodiment of the present disclosure and an adsorption heat pump system according to the second embodiment. [Figure 12] 10 is a graph showing an improvement rate of the cold heat generation output of the adsorption heat pump system of the first embodiment compared to the adsorption heat pump system of the second embodiment. [Figure 13] FIG. 4 is a schematic diagram showing the configuration of an adsorption heat pump system according to a second embodiment. [Figure 14] FIG. 14 is a schematic diagram showing the cold heat generation state in the evaporator / condenser in the configuration of FIG. 13. [Figure 15] FIG. 14 is a schematic diagram showing a state in which cold is generated in a first adsorption device in the configuration of FIG. 13. [Figure 16] FIG. 14 is a schematic diagram showing the state of adsorption of the adsorbate from the evaporator / condenser by the second adsorption device in the configuration of FIG. 13. [Figure 17] FIG. 14 is a schematic view showing a regeneration state of the second adsorber in the configuration of FIG. 13. [Figure 18] FIG. 10 is a pT diagram showing the operation of the adsorption heat pump system according to the second embodiment. [Figure 19] FIG. 1 is a contour diagram showing the calculation results of the mean cold power output (VCP) versus the wire diameter w of the adsorbent and the thickness H of the adsorption layer. [Figure 20] FIG. 1 is a contour diagram showing the calculation results of the heat storage amount (Q) of the adsorbent relative to the wire diameter w of the adsorbent and the thickness H of the adsorption layer. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. Note that common reference numerals in the individual drawings indicate the same objects even if they are not mentioned in the description of the individual drawings. In addition, in consideration of the readability of the drawings, reference numerals of objects not mentioned in the description may be omitted.

[0028] (1) Schematic configuration of the first embodiment FIG. 1 shows a schematic configuration of an adsorption heat pump system (hereinafter abbreviated as "heat pump") 10 according to a first embodiment.

[0029] The heat pump 10 includes an evaporator 14A, a first adsorption device 20, two second adsorption devices 22A and 22B, a recovery path 40, and a condenser 14B.

[0030] The evaporator 14A evaporates the adsorbate. That is, when energy (heat) acts on the liquid adsorbate adsorbed inside the evaporator 14A, the adsorbate evaporates, generating cold.

[0031] The first adsorption device 20 adsorbs the adsorbate from the evaporator 14A. The two second adsorption devices 22A and 22B each adsorb the adsorbate adsorbed by the first adsorption device 20. The first adsorption device 20 and the second adsorption devices 22A and 22B each contain a different type of adsorbent. The adsorbent for the second adsorption devices 22A and 22B is selected from a material that desorbs the adsorbate with heat at a regeneration temperature higher than that of the adsorbent for the first adsorption device 20. When the second adsorption devices 22A and 22B adsorb the adsorbate from the first adsorption device 20, energy (heat) acts on the adsorbate adsorbed inside the first adsorption device 20, causing the adsorbate to evaporate, generating cold energy.

[0032] In the first embodiment, the adsorbent of the first adsorbent 20 is, for example, AL-MOF (CAU-10), and the adsorbent of the second adsorbents 22A and 22B is, for example, zeolite 13X. The adsorbate may be, for example, water or ammonia. Water and ammonia are adsorbed onto and desorbed from the adsorbent under the conditions (temperature and pressure) required for the heat pump 10, and are inexpensive to procure.

[0033] The recovery path 40 connects the two second adsorption devices 22A and 22B to each other.

[0034] The condenser 14B adsorbs the adsorbates adsorbed by the second adsorbers 22A and 22B, thereby regenerating the second adsorbers 22A and 22B. Inside the condenser 14B, energy is taken from the adsorbates of the gas that has flowed in from the outside, and the adsorbates are condensed.

[0035] The evaporator 14A and the first adsorber 20 are connected by a connecting pipe 16A. The first adsorber 20 and the second adsorber 22A are connected by a connecting pipe 16B1. Furthermore, the first adsorber 20 and the second adsorber 22B are connected by a connecting pipe 16B2. The second adsorber 22A and the condenser 14B are connected by a connecting pipe 16C1. Furthermore, the second adsorber 22B and the condenser 14B are connected by a connecting pipe 16C2. In other words, the second adsorber 22A and the second adsorber 22B are connected in parallel between the first adsorber 20 and the condenser. The second adsorber 22A and the second adsorber 22B are connected by a recovery path 40. Furthermore, the condenser 14B and the evaporator 14A are connected by a connecting pipe 16D.

[0036] An on-off valve 18A is provided in the connecting pipe 16A. When the on-off valve 18A is opened, the adsorbate can be transferred from the evaporator 14A to the first adsorber 20. An on-off valve 18B1 is provided in the connecting pipe 16B1. When the on-off valve 18B1 is opened, the adsorbate can be transferred from the first adsorber 20 to the second adsorber 22A. An on-off valve 18B2 is provided in the connecting pipe 16B2. When the on-off valve 18B2 is opened, the adsorbate can be transferred from the first adsorber 20 to the second adsorber 22B. An on-off valve 18C1 is provided in the connecting pipe 16C1. When the on-off valve 18C1 is opened, the adsorbate can be transferred from the second adsorber 22A to the condenser 14B. An on-off valve 18C2 is provided in the connecting pipe 16C2. When the on-off valve 18C2 is opened, the adsorbate can be transferred from the second adsorber 22B to the condenser 14B. The connection pipe 16D is provided with an on-off valve 18D. When the on-off valve 18D is opened, the adsorbate can be transferred from the condenser 14B to the evaporator 14A.

[0037] A recovery valve 42 is provided in the recovery path 40. When the recovery valve 42 is opened, the adsorbate can move from the second adsorption device 22A to the second adsorption device 22B, and also from the second adsorption device 22B to the second adsorption device 22A.

[0038] The evaporator 14A is provided with a connecting pipe 30A that connects a low-temperature heat source 28L as a heat source. An on-off valve 32L is provided on the connecting pipe 30A. When the on-off valve 32L is opened, the heat exchange medium flows from the low-temperature heat source 28L to the evaporator 14A, undergoes heat exchange, and returns to the low-temperature heat source 28L. Note that the connecting pipes emanating from each heat source, which will be mentioned in the following explanation, are made up of an outbound path and a return path for the heat exchange medium, but are represented by a single dashed line in the drawings. Furthermore, the connecting pipes through which the heat exchange medium actually flows at each stage are represented by thick solid lines.

[0039] The first adsorption device 20 is provided with a connecting pipe 30B that connects two heat sources (a low-temperature heat source 28L and a medium-temperature heat source 28M). The connecting pipe 30B branches on the heat source side via three-way valves 20A corresponding to the respective heat sources, and at the ends of the branches, an on-off valve 34L is provided on the low-temperature heat source 28L side and an on-off valve 34M is provided on the medium-temperature heat source 28M side. When the on-off valve 34L is opened, the heat exchange medium flows from the low-temperature heat source 28L to the first adsorption device 20, undergoes heat exchange in the first adsorption device 20, and returns to the low-temperature heat source 28L. When the on-off valve 34M is opened, the heat exchange medium flows from the medium-temperature heat source 28M to the first adsorption device 20, undergoes heat exchange in the first adsorption device 20, and returns to the medium-temperature heat source 28M.

[0040] The second adsorption device 22A is provided with a connecting pipe 30C1 that connects two heat sources (the medium-temperature heat source 28M and the high-temperature heat source 28H). The connecting pipe 30C1 branches on the heat source side via three-way valves 22A1 corresponding to the respective heat sources, and at the ends of the branches, an on-off valve 36M1 is provided on the medium-temperature heat source 28M side and an on-off valve 36H1 is provided on the high-temperature heat source 28H side. When the on-off valve 36M1 is opened, the heat exchange medium flows from the medium-temperature heat source 28M to the second adsorption device 22A, undergoes heat exchange in the second adsorption device 22A, and returns to the medium-temperature heat source 28M. When the on-off valve 36H1 is opened, the heat exchange medium flows from the high-temperature heat source 28H to the second adsorption device 22A, undergoes heat exchange in the second adsorption device 22A, and returns to the high-temperature heat source 28H.

[0041] The second adsorption device 22B is provided with a connecting pipe 30C2 that connects two heat sources (the medium-temperature heat source 28M and the high-temperature heat source 28H). The connecting pipe 30C2 branches on the heat source side via a three-way valve 22B1 corresponding to each heat source, and at the ends of the branches, an on-off valve 36M2 is provided on the medium-temperature heat source 28M side and an on-off valve 36H2 is provided on the high-temperature heat source 28H side. When the on-off valve 36M2 is opened, the heat exchange medium flows from the medium-temperature heat source 28M to the second adsorption device 22B, undergoes heat exchange in the second adsorption device 22B, and returns to the medium-temperature heat source 28M. When the on-off valve 36H2 is opened, the heat exchange medium flows from the high-temperature heat source 28H to the second adsorption device 22B, undergoes heat exchange in the second adsorption device 22B, and returns to the high-temperature heat source 28H.

[0042] A connecting pipe 30D that connects a medium-temperature heat source 28M as a heat source is provided to the condenser 14B. An on-off valve 32M is provided to the connecting pipe 30D. When the on-off valve 32M is opened, the heat exchange medium flows from the medium-temperature heat source 28M to the condenser 14B, undergoes heat exchange, and returns to the medium-temperature heat source 28M.

[0043] Specific examples of the low-temperature heat source 28L, the medium-temperature heat source 28M, and the high-temperature heat source 28H are not particularly limited, but the medium-temperature heat source 28M has a higher temperature than the low-temperature heat source 28L, and the high-temperature heat source 28H has a higher temperature than the medium-temperature heat source 28M.

[0044] As shown in Fig. 2, the adsorbent 50 has a structure in which a large number of linear structures, each having an adsorption layer 60 formed on the outer periphery of a heat transfer tube 70 into which the flow path of the heat medium in the heat exchanger 5 in the second adsorbers 22A, 22B is subdivided, are bundled together. In other words, the adsorbent is stacked in a mesh-like pattern in multiple stages on the outer periphery of the heat transfer tube through which the heat medium flows, to form an adsorption layer. As shown in Fig. 3, the adsorption layer 60 has a mesh-like structure in which adsorbents 65 are stacked in multiple stages, with gaps 65a between them and arranged in the same direction. The adsorbents 65 in adjacent stages are arranged in different directions from each other, as shown in Fig. 3.

[0045] When the wire diameter of the adsorbent 65 shown in FIG. 3 is w (mm) and the thickness of the adsorption layer 60 formed by stacking multiple layers of this adsorbent 65 (four layers in FIG. 3 as an example) is H (mm), it is desirable that 2.3≦w≦3.5 and 10≦H≦15 are satisfied. Specifically, as will be described in detail later, it is desirable to form the adsorbent 65 with a wire diameter w and thickness H specified by the region inside the rectangle ABCD in the contour diagram of FIG. 19. Note that the cross section of the adsorbent 65 may be either a substantially square shape as shown schematically in FIG. 3 or a substantially circular shape. In the case of a substantially square shape, the wire diameter w represents the length of one side, and in the case of a substantially circular shape, the wire diameter w represents the diameter. In the second adsorbers 22A and 22B formed with such an adsorbent, the average cold power output (VCP) is approximately 37.5 kW / m 3 That's all.

[0046] Furthermore, it is more desirable that 2.7≦w≦3.5 and 10.7≦H≦14.3. Specifically, as will be described in detail later, it is more desirable to form the adsorbent 65 with a wire diameter w and thickness H specified in the region inside the rectangle EFGH in the contour diagram of Fig. 19. In the second adsorbers 22A and 22B configured with such an adsorbent, the average cold power output (VCP) is approximately 40.0 kW / m 3 That's all.

[0047] Furthermore, it is more desirable that 3.1≦w≦3.5 and 10.9≦H≦13.2. Specifically, as will be described in detail later, it is more desirable to form the adsorbent 65 with a wire diameter w and thickness H specified in the region inside the rectangle IJKL in the contour diagram of Fig. 19. In the second adsorbers 22A and 22B configured with such an adsorbent, the average cold power output (VCP) is approximately 42.5 kW / m 3 That's all.

[0048] The gap 65a between the adsorbents 65 is preferably 10 μm or more, more preferably 20 μm or more, and most preferably 50 μm or more. The gap 65a between the adsorbents 65 is preferably 1000 μm or less, more preferably 700 μm or less, and most preferably 500 μm or less.

[0049] The material of the adsorbent 65 is not particularly limited as long as it can be used as an adsorbent in a normal heat exchanger, but it is preferable to use, for example, silica gel, 13X zeolite, or Y-type zeolite. It is also preferable that the material of the adsorbent 65 contains a heat conduction aid such as carbon.

[0050] (2) General configuration of the second embodiment and cold heat generating method Before describing a method for generating cold heat using the heat pump 10 of the first embodiment, the schematic configuration of a heat pump of a second embodiment and a method for generating cold heat using the heat pump will be described. Note that the reference numerals attached to the components of the second embodiment are represented by adding "'" to the reference numerals of the corresponding components of the first embodiment.

[0051] FIG. 13 shows an adsorption heat pump system (hereinafter abbreviated as "heat pump") 10' according to a second embodiment.

[0052] The heat pump 10' has an evaporator / condenser 14', a first adsorber 20', and a second adsorber 22'. The evaporator / condenser 14' of the second embodiment functions both as an evaporator and as a condenser. That is, when energy (heat) acts on the adsorbate of the liquid inside, the adsorbate evaporates, generating cold. Also, when energy is removed from the adsorbate of the gas flowing in from the outside, the adsorbate condenses.

[0053] The adsorbents used in the first adsorption device 20' and the second adsorption device 22' are the same as those in the first embodiment.

[0054] The evaporator / condenser 14', the first adsorber 20' and the second adsorber 22' are connected in series in this order by connecting pipes 16A' and 16B'.

[0055] An on-off valve 18A' is provided in the connecting pipe 16A'. When the on-off valve 18A' is opened, the adsorbate can be transferred from the evaporator / condenser 14' to the first adsorber 20'. An on-off valve 18B' is provided in the connecting pipe 16B'. When the on-off valve 18B' is opened, the adsorbate can be transferred from the first adsorber 20' to the second adsorber 22'.

[0056] The evaporator / condenser 14' and the second adsorber 22' are connected by a bypass pipe 24' that bypasses the first adsorber 20'. A bypass valve 26' is provided in the bypass pipe 24'. When the bypass valve 26' is opened, the adsorbate can be transferred directly from the second adsorber 22' to the evaporator / condenser 14' without passing through the first adsorber 20', and from the evaporator / condenser 14' to the second adsorber 22' without passing through the first adsorber 20'.

[0057] The evaporator / condenser 14' is provided with a connecting pipe 30A' that connects two heat sources (low-temperature heat source 28L' and medium-temperature heat source 28M'). On the heat source side, connecting pipe 30A' branches via three-way valve 14C corresponding to each heat source, and at the ends of the branches, an on-off valve 32L' is provided on the low-temperature heat source 28L' side and an on-off valve 32M' is provided on the medium-temperature heat source 28M' side. When on-off valves 32L' and 32M' are opened, the heat exchange medium flows from the low-temperature heat source 28L' and medium-temperature heat source 28M' to the evaporator / condenser 14, where it is heat exchanged and returned to its original heat source.

[0058] The first adsorption device 20' is provided with a connecting pipe 30B' that connects two heat sources (a low-temperature heat source 28L' and a medium-temperature heat source 28M'). The connecting pipe 30B' branches on the heat source side via a three-way valve 20A' corresponding to each heat source, and at the ends of the branches, an on-off valve 34L' is provided on the low-temperature heat source 28L' side and an on-off valve 34M' is provided on the medium-temperature heat source 28M' side. When the on-off valves 34L' and 34M' are opened, the heat exchange medium flows from the low-temperature heat source 28L' and the medium-temperature heat source 28M' to the first adsorption device 20', where it is heat exchanged and returned to its original heat source.

[0059] The second adsorber 22' is provided with a connecting pipe 30C' that connects two heat sources (a medium-temperature heat source 28M' and a high-temperature heat source 28H'). The connecting pipe 30C' branches on the heat source side via a three-way valve 22A' corresponding to each heat source, and at the ends of the branches, an on-off valve 36M' is provided on the medium-temperature heat source 28M' side and an on-off valve 36H' is provided on the high-temperature heat source 28H' side. When the on-off valves 36M' and 36H' are opened, the heat exchange medium flows from the medium-temperature heat source 28M' and the high-temperature heat source 28H' to the second adsorber 22', where it is heat exchanged and returned to its original heat source.

[0060] Next, a method for generating cold energy using a heat pump 10' according to a second embodiment will be described with reference to the schematic diagrams of FIGS. 14 to 17 and the pT diagram of FIG. 18. The vertical axis of FIG. 18 represents pressure (kPa), with its natural logarithm plotted. The horizontal axis represents temperature (K), with its negative reciprocal plotted. The thick solid lines in the diagram represent the behavior of pressure and temperature in the first adsorption device 20', and the thin solid lines represent the behavior of pressure and temperature in the second adsorption device 22'. In addition, in FIGS. 14 to 17, the on-off valves shown in black represent a closed state, and the on-off valves shown in white represent an open state. The arrows indicate the direction of adsorbate movement, and the double-headed arrows represent a state in which the heat exchange medium is circulating. In the following example, the temperature of low-temperature heat source 28L' is 288K (15°C), the temperature of medium-temperature heat source 28M' is 303K (30°C), and the temperature of high-temperature heat source 28H' is 453K (180°C), but the specific temperatures are not limited as long as the temperature of medium-temperature heat source 28M' is higher than that of low-temperature heat source 28L' and the temperature of high-temperature heat source 28H' is higher than that of medium-temperature heat source 28M'. Furthermore, the pressure values ​​are merely examples and are not limited to specific values.

[0061] First, just before the state in Figure 14, cold energy has been generated from the first adsorption device 20' in the previous cycle (see Figure 15), and both the pressure and temperature are at their lowest. Point a in Figure 18 shows this state.

[0062] 14, the three-way valve 14C' of the connecting pipe 30A is switched to the low-temperature heat source 28L' side, and the on-off valve 32L' is opened to allow the heat exchange medium to flow from the low-temperature heat source 28L' to the evaporator / condenser 14'. Furthermore, the three-way valve 20A' of the connecting pipe 30B is switched to the medium-temperature heat source 28M' side, and the on-off valve 34M' is opened to allow the heat exchange medium to flow from the medium-temperature heat source 28M' to the first adsorption device 20'. Then, the on-off valve 18A' of the connecting pipe 16A is opened.

[0063] As a result, the adsorbate evaporates in the evaporator / condenser 14' and is adsorbed in the first adsorbent 20'. At this time, the heat of evaporation is removed in the evaporator / condenser 14', generating cold energy, and the pressure and temperature in the first adsorbent 20' rise from point a to point c via point b in Figure 18.

[0064] Next, the on-off valves 32L', 34M', and 18A' are closed, and then, as shown in Figure 15, the three-way valve 20A' of the connecting pipe 30B is switched to the low-temperature heat source 28L' side, while the on-off valve 34L' is opened, to allow the heat exchange medium to flow from the low-temperature heat source 28L' to the first adsorber 20'. Furthermore, the three-way valve 22A' of the connecting pipe 30C is switched to the medium-temperature heat source 28M' side, while the on-off valve 36M' is opened, to allow the heat exchange medium to flow from the medium-temperature heat source 28M' to the second adsorber 22'. Then, the on-off valve 18B' of the connecting pipe 16B' is opened.

[0065] As a result, the adsorbate evaporates in the first adsorber 20' and is adsorbed in the second adsorber 22'. At this time, the heat of evaporation is removed in the first adsorber 20', generating cold energy, causing the pressure and temperature inside the first adsorber 20' to decrease from point c to point d and then to point a in Figure 18. On the other hand, at the moment the on-off valve 18B' is opened, the pressure inside the second adsorber 22' is at its lowest point, point α in Figure 18, and due to the pressure difference with point b inside the first adsorber 20' at this time, the second adsorber 22' adsorbs the adsorbate from the first adsorber 20', causing the pressure to increase.

[0066] Then, the states shown in Figures 14 and 15 are repeated several times, and when the pressure inside the second adsorption device 22' reaches point β in Figure 18, which is equal to point a in Figure 18, which is the minimum pressure of the first adsorption device 20', the second adsorption device 22' is no longer able to adsorb the adsorbate from the first adsorption device 20'.

[0067] At this stage, the on-off valves 34L' and 18B' are closed while the on-off valve 36M' is left open. Then, as shown in FIG. 16 , the three-way valve 14C' of the connecting pipe 30A is switched to the low-temperature heat source 28L' side, and the on-off valve 32L' is opened to allow the heat exchange medium to flow from the low-temperature heat source 28L' to the evaporator / condenser 14'. When the bypass valve 26' of the bypass pipe 24' is opened, the adsorbate evaporates in the evaporator / condenser 14' and is adsorbed in the second adsorber 22' via the bypass pipe 24'. At this time, the heat of evaporation is removed in the evaporator / condenser 14' to generate cold, and the pressure and temperature in the second adsorber 22' rise from point β to point γ in FIG. 18 , and the adsorbent becomes saturated.

[0068] In this state, the on-off valves 32L', 36M' and the bypass valve 26' are closed, and as shown in FIG. 17 , the three-way valve 14C' of the connecting pipe 30A is switched to the medium-temperature heat source 28M' side, while the on-off valve 32M' is opened, allowing the heat exchange medium to move from the medium-temperature heat source 28M' to the evaporator / condenser 14'. Furthermore, the three-way valve 22A' of the connecting pipe 30C is switched to the high-temperature heat source 28H' side, while the on-off valve 36H' is opened, allowing the heat exchange medium to move from the high-temperature heat source 28H' to the second adsorber 22'. Then, the bypass valve 26' of the bypass pipe 24' is opened again. As a result, the adsorbate in the second adsorber 22' is desorbed by heat from the high-temperature heat source 28H', and the second adsorber 22' is regenerated. That is, inside the second adsorber 22′, the pressure reaches the maximum from point γ through point δ in FIG. 18, and while the temperature is increased from this point to point ε, the adsorbed adsorbate moves to the evaporator / condenser 14′ and is condensed.

[0069] When the inside of the second adsorber 22' reaches the maximum pressure and temperature at point ε, all valves are closed and the temperature of the second adsorber 22' decreases, while the pressure decreases to point α, which is close to zero. At this stage, the adsorbent in the second adsorber 22' is regenerated, and the second adsorber 22' becomes able to adsorb the adsorbate from the first adsorber 20' again.

[0070] From point α to point β in Figure 18, the same amount of adsorbate is desorbed twice in the evaporator / condenser 14' and the first adsorber 20', generating cold twice. This is the so-called double-effect mode. On the other hand, from point β to point γ, cold is generated only in the evaporator / condenser 14'. This is the so-called single-effect mode. For example, if the adsorbate is water, 2.5 kJ of cold is generated when 1 g of water evaporates in the evaporator / condenser 14'. Similarly, 3 kJ of cold is generated when 1 g of water evaporates in the first adsorber 20' containing AL-MOF as the adsorbate. That is, the cold generated by 1 g of water is 2.5 kJ in single-effect mode, but 5.5 kJ in double-effect mode, which is 2.2 times more cold than in single-effect mode.

[0071] (3) Cold heat generating method of the first embodiment The cold heat generating method of the first embodiment will be described using the schematic diagrams of Figures 4 to 9 and the pT diagram of Figure 10. The vertical and horizontal axes of the pT diagram are the same as in (2). The illustration method in the schematic diagram is also the same as in (2). In the following example, the temperature of the low-temperature heat source 28L is 288K (15°C), the temperature of the medium-temperature heat source 28M is 303K (30°C), and the temperature of the high-temperature heat source 28H is 453K (180°C). However, the specific temperatures are not limited as long as the temperature of the medium-temperature heat source 28M is higher than the temperature of the low-temperature heat source 28L and the temperature of the high-temperature heat source 28H is higher than the temperature of the medium-temperature heat source 28M. Furthermore, the pressure values ​​are merely examples and are not limited to specific values.

[0072] First, just before the state in Figure 4, cold energy has been generated from the first adsorption device 20 in the previous cycle (see Figure 5), and both the pressure and temperature are at their lowest. Point a in Figure 10 shows this state.

[0073] 4, the on-off valve 32L of the connecting pipe 30A is opened to allow the heat exchange medium to flow from the low-temperature heat source 28L to the evaporator 14A. Furthermore, the three-way valve 20A of the connecting pipe 30B is switched to the medium-temperature heat source 28M side, and the on-off valve 34M is opened to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the first adsorption device 20. Then, the on-off valve 18A of the connecting pipe 16A is opened.

[0074] As a result, the adsorbate evaporates in the evaporator 14A, and this adsorbate is adsorbed in the first adsorption device 20. At this time, the heat of evaporation is removed in the evaporator 14A, generating cold energy, and the pressure and temperature in the first adsorption device 20 rise from point a to point c via point b in Figure 10.

[0075] On the other hand, the adsorbent in the second adsorption device 22B has been saturated in the previous cycle (see FIG. 9). To regenerate the second adsorption device 22B, as shown in FIG. 4, the on-off valve 32M of the connecting pipe 30D is opened to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the condenser 14B. The three-way valve 22B1 of the connecting pipe 30C2 is switched to the high-temperature heat source 28H side, and the on-off valve 36H2 is opened to allow the heat exchange medium to flow from the high-temperature heat source 28H to the second adsorption device 22B. The on-off valve 18C2 of the connecting pipe 16C2 is then opened. This causes the adsorbate in the second adsorption device 22B to be desorbed by heat from the high-temperature heat source 28H, thereby commencing regeneration of the second adsorption device 22B. The adsorbate adsorbed inside the second adsorption device 22B is moved to the condenser 14B and condensed.

[0076] Next, the on-off valves 32L, 34M, and 18A are closed, and then, as shown in Fig. 5, the three-way valve 20A of the connecting pipe 30B is switched to the low-temperature heat source 28L side, while the on-off valve 34L is opened, to allow the heat exchange medium to flow from the low-temperature heat source 28L to the first adsorption device 20. Furthermore, the three-way valve 22A1 of the connecting pipe 30C1 is switched to the medium-temperature heat source 28M side, while the on-off valve 36M1 is opened, to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the second adsorption device 22A. Then, the on-off valve 18B1 of the connecting pipe 16B1 is opened.

[0077] As a result, the adsorbate evaporates in the first adsorption device 20, and this adsorbate is adsorbed in one of the second adsorption devices, 22A. At this time, the heat of evaporation is removed in the first adsorption device 20, generating cold energy, and the pressure and temperature inside the first adsorption device 20 decrease from point c to point d and then to point a in Figure 10. On the other hand, at the moment the on-off valve 18B1 is opened, the pressure inside the second adsorption device 22A is at its lowest point, point α' in Figure 10, and due to the pressure difference with point b inside the first adsorption device 20 at this time, the second adsorption device 22A adsorbs the adsorbate from the first adsorption device 20, and the pressure also increases.

[0078] On the other hand, the regeneration of the other second adsorber 22B continues from the state shown in FIG.

[0079] Then, the states in Figures 4 and 5 are repeated several times, and when the pressure inside the second adsorption device 22A reaches point β in Figure 10, which is equal to point a in Figure 10, which is the minimum pressure of the first adsorption device 20, the second adsorption device 22A is no longer able to adsorb the adsorbate from the first adsorption device 20.

[0080] At this stage, the on-off valves 34L, 18B1, and 18C2 are closed while the on-off valve 36M1 is left open, and then the recovery valve 42 of the recovery line 40 is opened as shown in Fig. 6. This causes further evaporation of the adsorbate from the second adsorbent 22B being regenerated by the high-temperature heat source 28H, and this adsorbate is adsorbed via the recovery line 40 in the second adsorbent 22A, which is about to complete adsorption of the adsorbate. At this time, the pressure and temperature within the second adsorbent 22A rise from point β to point γ in Fig. 10, and the adsorbent becomes saturated.

[0081] On the other hand, the adsorbent in the second adsorber 22B is regenerated and becomes capable of adsorbing the adsorbate from the first adsorber 20 again.

[0082] To regenerate the saturated second adsorber 22A, as shown in FIG. 7, the on-off valve 32M of the connecting pipe 30D is opened to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the condenser 14B. The three-way valve 22A1 of the connecting pipe 30C1 is switched to the high-temperature heat source 28H side, and the on-off valve 36H1 is opened to allow the heat exchange medium to flow from the high-temperature heat source 28H to the second adsorber 22A. The on-off valve 18C1 of the connecting pipe 16C1 is then opened. This desorbs the adsorbate from the second adsorber 22A by receiving heat from the high-temperature heat source 28H, thereby starting the regeneration of the second adsorber 22A. The temperature inside the second adsorber 22A rises from point γ to point δ in FIG. 10, reaching the maximum pressure, and then from there toward point ε. During this time, the adsorbate adsorbed inside the second adsorber 22A moves to the condenser 14B and is condensed.

[0083] 7, the on-off valve 32L of the connecting pipe 30A is opened to allow the heat exchange medium to flow from the low-temperature heat source 28L to the evaporator 14A. Furthermore, the three-way valve 20A of the connecting pipe 30B is switched to the medium-temperature heat source 28M side, and the on-off valve 34M is opened to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the first adsorption device 20. Then, the on-off valve 18A of the connecting pipe 16A is opened to evaporate the adsorbate in the evaporator 14A, and this adsorbate is adsorbed in the first adsorption device 20. At this time, the heat of evaporation is removed in the evaporator 14A, generating cold energy.

[0084] Next, the on-off valves 32L, 34M, and 18A are closed, and then, as shown in FIG. 8 , the three-way valve 20A of the connecting pipe 30B is switched to the low-temperature heat source 28L side, while the on-off valve 34L is opened, to allow the heat exchange medium to flow from the low-temperature heat source 28L to the first adsorption device 20. Furthermore, the three-way valve 22B1 of the connecting pipe 30C2 is switched to the medium-temperature heat source 28M side, while the on-off valve 36M2 is opened, to allow the heat exchange medium to flow from the medium-temperature heat source 28M to the second adsorption device 22B. Then, by opening the on-off valve 18B2 of the connecting pipe 16B2, the adsorbate evaporates in the first adsorption device 20, and this adsorbate is adsorbed in the second adsorption device 22B. At this time, the heat of evaporation is removed in the first adsorption device 20, thereby generating cold.

[0085] On the other hand, the regeneration of the second adsorption device 22A continues from the state shown in Fig. 7. During this time, the temperature inside the second adsorption device 22A continues to rise toward point ε shown in Fig. 10.

[0086] Then, the states of Figures 7 and 8 are repeated several times, and at the same time that the second adsorption device 22B becomes unable to adsorb the adsorbate from the first adsorption device 20, the inside of the second adsorption device 22A reaches the maximum pressure and temperature at point ε.

[0087] At this stage, if the on-off valves 34L, 18B2, and 18C1 are closed while the on-off valve 36M2 is left open, and then the recovery valve 42 of the recovery line 40 is opened as shown in Fig. 9, further adsorbate will evaporate from the second adsorbent 22A being regenerated by the high-temperature heat source 28H, and this adsorbate will be adsorbed via the recovery line 40 in the second adsorbent 22B just before adsorption of the adsorbate is completed, and the adsorbent will become saturated. At this time, the pressure in the second adsorbent 22A will decrease from point ε to point ε' in Fig. 10, while the temperature remains at its highest.

[0088] When the temperature inside the second adsorber 22A reaches point ε', all valves are closed and the temperature of the second adsorber 22A drops to point α', which is close to zero. At this stage, the adsorbent in the second adsorber 22A is regenerated, and the second adsorber 22A is again able to adsorb the adsorbate from the first adsorber 20.

[0089] Here, the straight line representing the decrease in pressure and temperature from point ε' to point α' in the second adsorption device 22A is obtained by shifting downward the straight line representing the decrease in pressure and temperature from point ε to point α in the second embodiment of (2) above (see FIG. 18 ) while maintaining the pressure difference between point ε and point ε'.

[0090] Therefore, the heat storage capacity that can be operated in double-effect mode in the second embodiment is between point α and point β in Fig. 18, whereas in the first embodiment it is expanded to between point α' and point β in Fig. 10. That is, in the first embodiment, the heat storage capacity that can be operated in double-effect mode is increased by the section from point α' to point α in Fig. 10 compared to the second embodiment.

[0091] Meanwhile, in the second embodiment, cold is generated in the single-effect mode from point β to point γ, whereas in the first embodiment, cold is not generated from point β to point γ. However, as described above, 2.2 times as much cold can be obtained in the double-effect mode as in the single-effect mode. Therefore, in the first embodiment, even if cold cannot be obtained in the single-effect mode, cold can be generated in the double-effect mode from point α' to point α, and the net amount of cold obtained increases.

[0092] Note that pressure and temperature changes as shown in FIG. 10 also occur inside the second adsorption device 22B.

[0093] 11 is a graph showing the relationship between the regeneration temperature and the amount of cold generated in the second adsorbers 22A, 22B using the high-temperature heat source 28H in the heat pump 10 of the first embodiment (line α), and the relationship between the regeneration temperature and the amount of cold generated in the second adsorber 22′ using the high-temperature heat source 28H′ in the heat pump 10′ of the second embodiment (line β). The amount of cold generated, shown on the vertical axis, represents the amount of cold (kJ) generated per gram of adsorbate (specifically, water). This graph shows that the first embodiment can generate a certain amount of cold more efficiently than the second embodiment, regardless of the regeneration temperature.

[0094] 12 is a graph showing the relationship between the improvement rate of the amount of cold generated in the first embodiment compared to the second embodiment and the regeneration temperature. The improvement rate on the vertical axis represents the value obtained by dividing the amount of cold generated in the first embodiment (line α) by the amount of cold generated in the second embodiment (line β) at the same regeneration temperature. From this graph, it can be seen that the lower the regeneration temperature, the higher the improvement rate of the amount of cold generated in the heat pump 10 of the first embodiment.

[0095] In the adsorption heat pump system of the present disclosure, the number of second adsorbers is not limited to two as in the first embodiment, and may be one as in the second embodiment, or three or more second adsorbers may be provided. When three or more second adsorbers are provided, recovery paths may be provided between one second adsorber and all of the other second adsorbers, or recovery paths may be provided only between one second adsorber and some of the other second adsorbers. [Example]

[0096] Below, we investigated the suitable wire diameter w of the adsorbent and the thickness H of the adsorption layer. Specifically, the inner diameter of the heat transfer tube was 1 cm. Furthermore, the heat transfer tubes provided with the adsorption layers shown below were spaced 2 mm apart. The adsorbent material was primarily silica gel with a particle size of 74 μm, to which carbon was mixed at a ratio of 10 mass % of the total as a heat conduction aid. This material was formed into wires with a wire diameter w and a substantially square cross section, and the wires were stacked around the heat transfer tube in a mesh-like pattern in n layers (where n is a natural number between 3 and 50) as shown in Figure 3 to form an adsorption layer. As examples, the average cold output (VCP) and total heat storage density (Q) were measured for a second adsorber equipped with adsorbents having various wire diameters w (mm) and adsorption layers with a thickness H (mm) obtained by stacking these in n layers, after one hour of adsorption time. The average cold output (kW / m 3 ) was calculated as the power per unit volume. Total heat storage density (MJ / m 3 ) was calculated as energy per unit volume. The utilization of the adsorbent was calculated as the ratio of the amount of adsorbate actually adsorbed to the amount of adsorbate that could theoretically be adsorbed.

[0097] FIG. 19 is a contour diagram created based on a three-dimensional graph in which the thickness H of the adsorption layer is plotted on the x-axis, the wire diameter w of the adsorbent on the y-axis, and the mean cold power output (VCP) on the z-axis. The values ​​shown in FIG. 19 represent the range of values ​​for the mean cold power output (VCP) in the corresponding region. FIG. 20 is a contour diagram created based on a three-dimensional graph in which the thickness H of the adsorption layer is plotted on the x-axis, the wire diameter w of the adsorbent on the y-axis, and the total heat storage density (Q) of the adsorbent on the z-axis. The values ​​shown in FIG. 20 represent the range of values ​​for the total heat storage density (Q) of the adsorbent in the corresponding region. The unshaded regions in the upper right and upper left of the graph in FIG. 19 represent regions where the mean cold power output (VCP) was less than 30.0.

[0098] In FIG. 19, the adsorbent having a wire diameter w and a thickness H within the range of a rectangle ABCD surrounded by point A where w=2.3 and H=15, point B where w=3.5 and H=15, point C where w=3.5 and H=10, and point D where w=2.3 and H=10 has a wire diameter w of approximately 37.5 kW / m 3 It can be seen that an average cooling power output (VCP) of above can be obtained.

[0099] That is, when the wire diameter w of the adsorbent and the thickness H of the adsorption layer satisfy the above relationship, the heat storage adsorber using this adsorbent has a capacity of approximately 37.5 kW / m 3 As a result, a high average cold power output (VCP) can be obtained. Applying this range to Figure 20, if the adsorbent wire diameter w and adsorption layer thickness H satisfy the above relationship, the total heat storage density (Q) of the adsorbent is approximately 175.0 MJ / m 3 As a result, a high value is obtained.

[0100] Therefore, in an adsorption heat pump system in which the wire diameter w (mm) of the adsorbent is 2.3 to 3.5 and the thickness H (mm) of the adsorption layer is 10 to 15, it is possible to increase the average cold output (VCP) and total heat storage density (Q) of the adsorbent in the second adsorption unit even when the adsorbate is adsorbed under relatively low pressure conditions of 2 kPa or less.

[0101] In addition, in FIG. 19, the adsorbent having a wire diameter w and a thickness H within the range of a rectangle EFGH surrounded by point E where w=2.7 and H=14.3, point F where w=3.5 and H=14.3, point G where w=3.5 and H=10.7, and point H where w=2.7 and H=10.7 has a wire diameter w of approximately 40.0 kW / m 3 It can be seen that an even higher average cold power output (VCP) can be obtained. Furthermore, from Figure 20, the total heat storage density (Q) of the adsorbent within the range of this rectangle EFGH is approximately 200.0 MJ / m 3 Thus, higher values ​​can be obtained.

[0102] Therefore, in an adsorption heat pump system in which the wire diameter w (mm) of the adsorbent is 2.7 to 3.5 and the thickness H (mm) of the adsorption layer is 10.7 to 14.3, it is possible to further increase the average cold output (VCP) and total heat storage density (Q) of the adsorbent in the second adsorption unit, even when the adsorbate is adsorbed under relatively low pressure conditions of 2 kPa or less.

[0103] Furthermore, in FIG. 19, the adsorbent having a wire diameter w and a thickness H within the range of a rectangle IJKL surrounded by point I where w=3.1 and H=13.2, point J where w=3.5 and H=13.2, point K where w=3.5 and H=10.9, and point L where w=3.1 and H=10.9 has a wire diameter w of approximately 42.5 kW / m 3 It can be seen that an even higher average cold power output (VCP) can be obtained. Furthermore, from Figure 20, it can be seen that the total heat storage density (Q) of the adsorbent within the range of this rectangle IJKL is at least 200.0 MJ / m 3 Above, within roughly half the range, 225.0MJ / m 3 Thus, higher values ​​can be obtained.

[0104] Therefore, in an adsorption heat pump system in which the wire diameter w (mm) of the adsorbent is 3.1 or more and 3.5 or less and the thickness H (mm) of the adsorption layer is 10.9 or more and 13.2 or less, it is possible to further increase the average cold output (VCP) and total heat storage density (Q) of the adsorbent in the second adsorption unit even when the adsorbate is adsorbed under relatively low pressure conditions of 2 kPa or less. [Explanation of symbols]

[0105] 10 Heat pump system (heat pump) 14A Evaporator 14B Condenser 16A, 16B1, 16B2, 16C1, 16C2, 16D connecting piping 18A, 18B1, 18B2, 18C1, 18C2, 18D On-off valve 20 First adsorption device 20A three-way valve 22A, 22B Second adsorber 22A1, 22B1 Three-way valve 28L low temperature heat source 28M medium temperature heat source 28H high temperature heat source 30A, 30B, 30C1, 30C2, 30D connecting pipe 32L, 34L, 34M, 36M1, 36M2, 36H1, 36H2 On-off valve 40 Recovery Route 42 Recovery valve 50 Adsorbent 60 Adsorption layer 65 Adsorbent 65a gap 70 Heat transfer tube

Claims

1. an evaporator for evaporating the adsorbate; a first adsorber that adsorbs the adsorbate from the evaporator; a second adsorption device that adsorbs the adsorbate adsorbed from the first adsorption device; a condenser that adsorbs the adsorbate from the second adsorbent that has adsorbed the adsorbate; An adsorption heat pump system having: The second adsorption device has two or more second adsorption devices, a recovery line connecting the two or more second adsorption devices to each other and having a recovery valve provided therein; In the second adsorber, an adsorption layer is formed by stacking adsorbents in a mesh pattern in a plurality of stages on the outer periphery of a heat transfer tube through which a heat medium flows, the adsorbents in the same stage are arranged in parallel with each other via gaps in the same direction, and the adsorbents in adjacent stages are arranged in different directions from each other, The wire diameter w (mm) of the adsorbent 2.3≦w≦3.5 and The thickness H (mm) of the adsorption layer 10≦H≦15 This is an adsorption heat pump system.

2. The wire diameter w (mm) of the adsorbent 2.7≦w≦3.5 and The thickness H (mm) of the adsorption layer 10.7≦H≦14.3 The adsorption heat pump system according to claim 1 ,

3. The wire diameter w (mm) of the adsorbent 3.1≦w≦3.5 and The thickness H (mm) of the adsorption layer 10.9≦H≦13.2 The adsorption heat pump system according to claim 2, wherein

4. The adsorption heat pump system according to claim 2 or 3, wherein the gap is 500 μm or less.

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