Heat storage supply device, heat storage material, and heat storage and release method

Abstract

To provide a heat storage supply device enabling stable heat storage operation in a low-temperature range of about 60°C.SOLUTION: A heat storage supply device comprises: air supply means 10 of supplying moist air; a first heat storage tank 20 that houses a first adsorbent M1 that generates heat by adsorbing an adsorbate, and leads out the introduced moist air as dry air with a higher temperature and lower humidity than the moist air; a first heat exchanger 40 that leads out the introduced dry air as heat storage air with a higher temperature and lower humidity than the dry air by exchanging heat with a heat medium supplied from a heat source 70; and a second heat storage tank 30 that stores a second adsorbent M2 that generates heat by adsorbing the adsorbate, and stores heat in the second adsorbent M2 by the introduced heat storage air.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a heat storage supply device, a heat storage material, and a heat storage and release method.

Background Art

[0002] Conventionally, in order to effectively utilize thermal energy, surplus thermal energy such as factory waste heat is stored in a heat storage tank having a heat storage material, transported to a heat demand area, or the stored thermal energy is utilized in a demand area or facility within the same site or in the vicinity. A heat storage supply device has been proposed. This heat storage supply device includes, for example, a heat storage tank filled with a heat storage material inside, and by sending high-temperature gas into the heat storage material in the heat storage tank, the desorption reaction of the heat storage material is advanced to store heat. When using the stored heat, by sending moist air into the heat storage material in the heat storage tank, the adsorption reaction of the heat storage material is advanced to release heat, and it was possible to supply high-temperature dry air.

[0003] Patent Document 1 discloses a cold, warm, and heat supply device in which an adsorbent as the heat storage material is filled in a heat storage material filling tank. According to Patent Document 1, by sending dry, high-temperature air to the adsorbent filled in the heat storage material filling tank, the adsorbed substance of the adsorbent is removed to generate cold heat in a heat storage operation, and by sending moist air, the adsorbed substance is adsorbed to the adsorbent to generate warm heat in a heat release operation. The cold, warm, and heat thus generated is reformed to a desired temperature by, for example, a heat exchanger or a vaporization cooler installed outside the heat storage tank and output as heat release.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in this type of heat storage supply device, conventionally, the desorption reaction (heat storage) of the heat storage material has been advanced by using high-temperature exhaust heat of 100°C or higher, or relatively high-temperature exhaust heat of at least about 80°C. However, with the recent social demands for energy conservation and the like, the use of exhaust heat in the low-temperature range of about 60°C has been required, and there has been room for improvement in the conventional heat storage supply device.

[0006] In addition, in the conventional heat storage supply device, when the exhaust heat temperature from a factory or the like is not stable, specifically, when the exhaust heat temperature changes over time, the desorption reaction (heat storage) of the heat storage material cannot be stably performed. As a result, there has been a risk that stable heat supply at the demand site would become difficult.

[0007] In the above-described prior art, there is no disclosure or suggestion regarding the improvement of such points, and the development of a heat storage supply device capable of a stable desorption reaction (heat storage) of the heat storage material in the low-temperature range has been awaited.

[0008] The present invention has been made in view of such points, and an object thereof is to provide a heat storage supply device capable of stable heat storage operation in the low-temperature range of about 60°C.

Means for Solving the Problem

[0009] In order to solve the above problems, the present invention is a heat storage supply device, comprising: an air supply means for supplying moist air; a first heat storage tank that houses a first adsorbent that generates heat by adsorbing an adsorbate and that discharges the introduced moist air as dry air having a higher temperature and lower humidity than the moist air; a drying heat exchanger that discharges the introduced dry air as heat storage air having a higher temperature and lower humidity than the dry air by heat exchange with a heat medium supplied from a heat source; and a second heat storage tank that houses a second adsorbent that generates heat by adsorbing an adsorbate and that performs heat storage of the second adsorbent by the introduced heat storage air.

[0010] According to the present invention, in the heat storage operation in the second heat storage tank, prior to heating and dehumidifying the moist air by the drying heat exchanger, the moist air is converted into dry air that is higher in temperature and lower in humidity than the moist air by the heat dissipation operation in the first heat storage tank. Thereby, the humidity of the heat storage air introduced into the second heat storage tank can be reduced. As a result, even when the temperature of the heat medium supplied to the drying heat exchanger is low, the heat storage of the second adsorbent can be appropriately performed (two-stage heat storage). Thereby, the heat dissipation temperature of the second adsorbent can be increased, and the amount of heat dissipation from the second adsorbent can be increased. Note that the moist air mentioned here may be, for example, outside air. Also, when it is said that the temperature of the heat medium is low here, it means that, as an example, the temperature is about 40°C to 60°C. When performing one-stage heat storage at a heat medium temperature of about 60°C, there is a limit to the relative humidity at which the adsorbent can be dried, and the heat dissipation temperature during the heat dissipation operation becomes low. In this regard, according to the present invention, by performing two-stage heat storage of the adsorbent as described above, the heat dissipation temperature from the adsorbent can be increased (heat-up), and the amount of heat dissipation itself can also be increased by drying the adsorbent more.

[0011] The heat storage supply device may further include a second drying heat exchanger that, when storing heat in the first adsorbent, exchanges heat with the heat medium supplied from the heat source to introduce the introduced moist air into the first heat storage tank as second heat storage air that is higher in temperature and lower in humidity than the moist air. The second drying heat exchanger is used, for example, during the heat storage operation in the first heat storage tank, whereby the heat storage operation of the first adsorbent can be appropriately performed.

[0012] It is desirable that the heat medium supplied to at least one of the drying heat exchanger or the second drying heat exchanger is heat supplied from a renewable energy source or predetermined exhaust heat.

[0013] Furthermore, the heat storage supply device may further include a third heat storage tank that houses a third adsorbent that generates heat by adsorbing an adsorbate and introduces the introduced heat storage air into the second heat storage tank as new heat storage air that is higher in temperature and lower in humidity than the heat storage air. According to the present invention, the heat storage density of the second adsorbent accommodated in the second heat storage tank can be further improved.

[0014] Furthermore, the heat storage supply device may further include: a second air supply means for supplying moist air; a third heat storage tank that accommodates a third adsorbent that generates heat by adsorbing an adsorbate and that discharges the introduced moist air as second dry air that is higher in temperature and lower in humidity than the moist air; a third drying heat exchanger that discharges the introduced second dry air as third heat storage air that is higher in temperature and lower in humidity than the second dry air by heat exchange with a heat medium supplied from a heat source; and a fourth heat storage tank that accommodates a fourth adsorbent that generates heat by adsorbing an adsorbate and that stores heat of the fourth adsorbent by the introduced third heat storage air. At this time, the heat medium supplied to the third drying heat exchanger may be the heat radiation air heated by the heat radiation of the second adsorbent stored in the second heat storage tank. According to the present invention, the heat storage density of the second adsorbent accommodated in the second heat storage tank can be further improved.

[0015] The heat storage supply device may further include a transportation means for transporting the second heat storage tank between the heat demand site.

[0016] The heat storage supply device may further include a control means that measures at least one of the heat storage and release time or the heat storage and release temperature of the second adsorbent and controls the heat storage and release of the second adsorbent based on the measurement result. At this time, the control means may notify an alarm at the timing of completion of heat storage and release of the second adsorbent.

[0017] From another perspective, the present invention relates to a heat storage material filled and used in a heat storage supply device. The heat storage supply device includes an air supply means for supplying moist air, a first heat storage tank for introducing the introduced moist air and discharging it as dry air that is higher in temperature and lower in humidity than the moist air, a drying heat exchanger for discharging the introduced dry air as heat storage air that is higher in temperature and lower in humidity than the dry air through heat exchange with a heat medium supplied from a heat source, and a second heat storage tank for introducing the introduced heat storage air and discharging it as exhaust air that is lower in temperature and higher in humidity than the heat storage air. The moisture in the moist air is adsorbed and heat is released inside the first heat storage tank, and the moisture is desorbed by the heat storage air and heat is stored inside the second heat storage tank.

[0018] From yet another perspective, the present invention relates to a heat storage and release method performed using a heat storage supply device, which includes a step of converting moist air introduced into a first heat storage tank into dry air that is higher in temperature and lower in humidity than the moist air by an adsorption reaction of a first adsorbent accommodated inside the first heat storage tank, a step of converting the dry air derived from the first heat storage tank into heat storage air that is higher in temperature and lower in humidity than the dry air through heat exchange with a heat medium supplied from a heat source, and a step of introducing the heat storage air into a second heat storage tank and allowing a desorption reaction of a second adsorbent accommodated inside the second heat storage tank to proceed.

[0019] The method may further include a step of transporting the second heat storage tank in which the desorption reaction of the second adsorbent has occurred to a heat demand location, and a step of introducing heat release air into the second heat storage tank at the heat demand location and generating exhaust air that is higher in temperature and lower in humidity than the heat release air by an adsorption reaction of the second adsorbent.

[0020] Furthermore, in the method, the second heat storage tank in which the adsorption reaction of the second adsorbent has occurred may be connected to the heat storage supply device as the first heat storage tank, and the adsorption reaction of the second adsorbent may be performed.

Advantages of the Invention

[0021] According to the present invention, a heat storage supply device capable of stable heat storage operation in a low temperature range of about 60°C can be provided.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

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Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described. FIG. 1 schematically shows the outline of the system of the heat storage supply system according to the embodiment. The heat storage supply system includes a heat storage supply device 1 and a control means 2.

[0024] The heat storage supply device 1 includes an air supply means 10, a first heat storage tank 20, a second heat storage tank 30, a first heat exchanger 40, and a second heat exchanger 50.

[0025] In one embodiment, the air supply means 10 includes a fan. The fan of the air supply means 10 may be an inverter-controlled fan. Further, a duct 61 is connected to the inlet side (upstream side) of the air supply means 10, and a first heat storage tank 20 is connected to the air outlet on the outlet side (downstream side) via a duct 62. The air supply means 10 introduces humid air, for example, outside air OA, through a damper 10a provided in the duct 61 on the inlet side (upstream side), and blows the introduced humid air toward the first heat storage tank 20 via the duct 62.

[0026] Although not shown in the drawings, a mixing gas may be mixed into the outside air OA blown from the air supply means 10 toward the first heat storage tank 20. In other words, the air supply means 10 may blow mixed air of the outside air OA and the mixing gas as humid air into the first heat storage tank 20. As the mixing gas, for example, relatively high-temperature air or relatively high-humidity air obtained from factory exhaust gas or the like can be used.

[0027] The flow rates of the relatively high-temperature air and the relatively high-humidity air as the mixing gas can be controlled by opening and closing control of a damper (not shown). As the damper 10a for controlling the flow rate of the outside air OA and the damper (not shown) for controlling the flow rate of the mixing gas, a motor damper that is easy to control can be used as an example. These motor dampers can be opened and closed based on the measured values (pressure, temperature, and humidity of the outside air OA and the mixed air) of a pressure sensor and a temperature and humidity sensor (not shown). In such a case, the opening and closing of each motor damper are controlled so that the temperature and humidity of the humid air (mixed air) blown into the first heat storage tank 20 reach a predetermined value. However, when the fluctuation range of the relatively high-humidity air and the relatively low-humidity air introduced into the air supply means 10 is large, the opening and closing of the motor damper may be controlled by feedforward control.

[0028] The first heat storage tank 20 introduces the humid air from the air supply means 10 from the inlet side (upstream side), and guides the introduced humid air as dry air that is at least higher in temperature and lower in humidity than the humid air to the duct 63 on the outlet side.

[0029] The first heat storage tank 20 has a filling portion 21 filled with the first adsorbent M1, which is partitioned vertically by a breathable partition plate. Spaces 22 and 23 are provided above and below the filling portion 21. The duct 62 described above is connected to the inlet side of the first heat storage tank 20, more specifically, the inlet sides of the spaces 22 and 23. The duct 62 is branched into three ducts 62a, 62b, and 62c. The duct 62a is connected to the inlet side of the space 22, the duct 62b is connected to the inlet side of the space 23, and the duct 62c bypasses the first heat storage tank 20.

[0030] Dampers 22a and 23a corresponding to the spaces 22 and 23 are provided in the ducts 62a and 62b, respectively. A damper D1 is provided in the duct 62c. In the heat storage supply device 1, the introduction of moist air and heat storage air into the first heat storage tank 20 is controlled by controlling the opening and closing of these dampers 22a, 23a, and D1. For these dampers 22a, 23a, and D1, for example, motor dampers that are easy to control can be used.

[0031] In one embodiment, as the first adsorbent M1 filled in the filling portion 21, for example, granulated adsorbents can be used. For this first adsorbent M1, for example, known adsorbents that generate heat by adsorbing adsorbates such as silica gel and zeolite can be used, and granules of adsorbents having desired performance such as ventilation resistance and heat / mass transfer can be used as adsorbents having a heat storage function. In such a case, a composite composed of amorphous aluminum silicate and low-crystalline clay, for example, a low-temperature regeneration type adsorbent such as Husk Ray (registered trademark) or a polymer sorbent, or a conventional adsorbent (such as silica gel and zeolite) can be applied as the first adsorbent M1.

[0032] On the outlet side (downstream side) of the first heat storage tank 20, more specifically on the outlet sides of the spaces 22 and 23, a first heat exchanger 40 is connected via the duct 63 described above. A duct 62c, which is the bypass duct described above, is also connected to the duct 63. The duct 63 has a duct 63a connected to the outlet side of the space 22 and a duct 63b connected to the outlet side of the space 23. The ducts 63a, 63b and the duct 62c are connected to the first heat exchanger 40 after merging.

[0033] Moreover, dampers 22b and 23b corresponding to the spaces 22 and 23 respectively are provided in the ducts 63a and 63b. For these dampers 22b and 23b as well, for example, motor dampers that are easy to control can be used.

[0034] The first heat exchanger 40 is a heat exchanger for performing heat exchange between a heat medium supplied from a predetermined heat source 70 and the dry air introduced from the inlet side via the duct 63. The first heat exchanger 40 operates in the heat storage operation of the second adsorbent M2 filled in the second heat storage tank 30 as will be described later. The first heat exchanger 40 introduces dry air from the first heat storage tank 20 from the inlet side (upstream side), and guides the introduced dry air as heat storage air that is at least higher in temperature and lower in humidity than the dry air, through the duct 64 on the outlet side (downstream side) to the second heat storage tank 30 connected thereto.

[0035] It should be noted that the heat medium supplied to the first heat exchanger 40 is preferably, for example, the exhaust heat of a so-called cogeneration system or the heat supplied from a renewable energy source such as solar heat. In other words, the heat source 70 can be the exhaust heat of a cogeneration system (for example, a condenser), a building such as a factory equipped with a recovery system for renewable energy, or the cooling water circulating in a server room. Also, for example, as the heat medium supplied to the first heat exchanger 40, instead of or in addition to the exhaust heat described above, the warm water discharged from a factory or the like, or the warm water using geothermal heat or hot springs can be used. In such a case, heat recovery from the warm water is carried out in the first heat exchanger 40. Also, the temperature of the heat medium supplied to the first heat exchanger 40 can be, for example, about 40°C to 60°C.

[0036] The second heat storage tank 30 introduces the heat storage air from the first heat exchanger 40 from the inlet side (upstream side), and uses the introduced heat storage air to store heat in the second adsorbent M2 filled inside, which will be described later. The heat storage air used for heat storage of the second adsorbent M2 in the second heat storage tank 30 is led out as exhaust air that is at least lower in temperature and higher in humidity than the heat storage air to the duct 65 on the outlet side (downstream side).

[0037] The second heat storage tank 30 has a filling portion 31 filled with the second adsorbent M2 partitioned vertically by a breathable partition plate, and spaces 32 and 33 are provided above and below the filling portion 31. The duct 64 described above is connected to the inlet side of the second heat storage tank 30, more specifically, the inlet sides of the spaces 32 and 33. The duct 64 is branched into three ducts 64a, 64b, and 64c. The duct 64a is connected to the inlet side of the space 32, the duct 64b is connected to the inlet side of the space 33, and the duct 64c bypasses the second heat storage tank 30.

[0038] Dampers 32a and 33a corresponding to the spaces 32 and 33 are provided in the ducts 64a and 64b. Also, a damper D2 is provided in the duct 64c. For these dampers 32a, 33a, and D2, for example, motor dampers that are easy to control can be used.

[0039] In one embodiment, as the second adsorbent M2 filled in the filling portion 31, for example, granulated adsorbents can be used. Similar to the first adsorbent M1, the second adsorbent M2 can be, for example, a composite composed of amorphous aluminum silicate and low-crystalline clay, such as Husk Ray (registered trademark) or a low-temperature regeneration type adsorbent of a polymer sorbent, or a conventional adsorbent (such as silica gel or zeolite). Note that the same adsorbent may be filled in the filling portion 21 of the first heat storage tank 20 and the filling portion 31 of the second heat storage tank 30, or different types of adsorbents may be filled in each.

[0040] In the heat storage supply device 1 according to the embodiment, the heat energy stored in the second adsorbent M2 is radiated and utilized at the heat demand site. At this time, the second heat storage tank 30 may perform a heat radiation operation inside the heat storage supply device 1, or may perform a heat radiation operation outside the heat storage supply device 1. In other words, the second heat storage tank 30 may be configured to be detachable from the heat storage supply device 1. When the second heat storage tank 30 performs a heat radiation operation outside the heat storage supply device 1, the second heat storage tank 30 is transported to the heat demand site by a transport means (not shown).

[0041] The duct 65 is connected to the outlet side (downstream side) of the second heat storage tank 30, more specifically, the outlet sides of the spaces 32 and 33. The duct 65 has a duct 65a connected to the outlet side of the space 32 and a duct 65b connected to the outlet side of the space 33, and these ducts 65a and 65b merge with the duct 64c which is the bypass path described above.

[0042] Further, dampers 32b and 33b corresponding to the spaces 32 and 33 are provided in the ducts 65a and 65b. For these dampers 32b and 33b, for example, motor dampers that are easy to control can be used.

[0043] The exhaust air after being used for heat storage of the second adsorbent M2 is heated and humidified, for example, in the heat source 70 (for example, a factory) described above, and then used as a heat medium supplied to the above-described mixed gas, the first heat exchanger 40, and a second heat exchanger 50 described later.

[0044] In one embodiment, the second heat exchanger 50 is provided in a duct 61 connected to the upstream side of the first heat storage tank 20 (upstream side of the air supply means 10 in the illustrated example). The second heat exchanger 50 is a heat exchanger for performing heat exchange between the heat medium supplied from a predetermined heat source 70 and the outside air OA flowing through the duct 61. The second heat exchanger 50 operates during the heat storage operation of the first adsorbent M1 filled in the first heat storage tank 20 as described later, and guides the introduced outside air OA to the first heat storage tank 20 as the second heat storage air that is at least hotter and less humid than the outside air OA. In other words, the air introduced into the air supply means 10 and the first heat storage tank 20 may be heat storage air that is at least hotter and less humid than the outside air OA.

[0045] Note that the heat medium from the heat source 70 supplied to the second heat exchanger 50 is preferably heat supplied from the exhaust heat of a so-called cogeneration system or a renewable energy source such as solar heat as described above. Also, for example, instead of or in addition to the exhaust heat described above, the heat medium supplied to the second heat exchanger 50 can utilize warm water using factory warm wastewater, geothermal heat, hot springs, etc. Also, the heat medium supplied to the second heat exchanger 50 may be the same as the heat medium supplied to the first heat exchanger 40, or may be a different refrigerant. More specifically, the heat source connected to the second heat exchanger 50 may be the heat source 70 connected to the first heat exchanger 40, or may be a different heat source.

[0046] In the example shown in FIG. 1, during the heat storage operation of the first adsorbent M1 filled in the first heat storage tank 20, the outside air OA was heat-exchanged by the second heat exchanger 50 and then introduced into the first heat storage tank 20 by the air supply means 10. However, the humid air introduced into the first heat storage tank 20 does not necessarily need to be heat-exchanged in the second heat exchanger 50, and for example, the heat exchange can be omitted according to the temperature and humidity of the recovered humid air. In other words, the second heat exchanger 50 may be appropriately omitted from the configuration of the heat storage supply device 1 according to the installation location etc. of the heat storage supply device 1 according to the present invention.

[0047] In the heat storage supply device 1 shown in FIG. 1, the outside air OA as the introduced moist air is heat-exchanged with the heat medium (about 40°C to 60°C) from the heat source 70 in the first heat exchanger 40 and the second heat exchanger 50. Instead of this, exhaust air at about 40°C to 60°C may be directly introduced into the heat storage supply device 1. The exhaust air at about 40°C to 60°C introduced into the heat storage supply device 1 can be, for example, exhaust from a hot aisle such as a data center, engine exhaust, or exhaust from the above-described cogeneration system. In such a case, it is desirable to provide a filter (not shown) in the heat storage supply device 1 and remove pollutants such as NOx through the filter. Further, for example, when there are both exhaust air at about 40°C to 60°C and hot water at about 40°C to 60°C as the heat source 70, both can be used as the heat medium.

[0048] The control means 2 controls each heat storage operation and heat release operation in the first heat storage tank 20 and the second heat storage tank 30 in the heat storage supply device 1. The control means 2 may be configured integrally with the heat storage supply device 1, or may be configured to be able to remotely control the heat storage supply device 1.

[0049] The heat storage supply device 1 has the above configuration. Next, a control example of each heat storage operation and heat release operation of the first heat storage tank 20 and the second heat storage tank 30 performed using the heat storage supply device 1 shown in FIG. 1 will be described. In the heat storage supply device 1 according to the embodiment, as described above, the heat energy stored in the second adsorbent M2 is released at the heat demand site. At this time, the first heat storage tank 20 functions as an auxiliary heat storage tank for storing heat energy with a higher density in the second heat storage tank 30 (the second adsorbent M2). Note that the numerical values of temperature and humidity shown in the following description are examples.

[0050] <Heat storage operation of the first heat storage tank 20> First, the heat storage operation of the first heat storage tank 20 will be described. FIG. 2 is a schematic diagram showing the state of the heat storage operation of the first heat storage tank 20.

[0051] During the heat storage operation of the first heat storage tank 20, the heat dissipation operation of the second heat storage tank 30 may be performed in parallel therewith. That is, during the heat storage operation of the first heat storage tank 20, as shown in FIG. 2, the second heat storage tank 30 may be removed from the heat storage supply device 1.

[0052] During the heat storage operation of the first heat storage tank 20, a heat medium (60°C) is supplied from a predetermined heat source 70 to the second heat exchanger 50, and the taken-in outside air OA (16.6°C, 61% RH (7.2 g / kg)) is at least higher in temperature and lower in humidity than the outside air OA to be the second heat storage air (50.0°C, 9.4% RH (7.2 g / kg)), and is led out toward the first heat storage tank 20 by the air supply means 10.

[0053] Subsequently, in the first heat storage tank 20, the dampers 22a and 23b are opened, and the dampers 23a and 22b are closed. As a result, the second heat storage air from the air supply means 10 is sent from the space 22 of the first heat storage tank 20 to the filling portion 21, passes through the first adsorbent M1 filled in the filling portion 21, and is sent as exhaust air that is lower in temperature and higher in humidity than the second heat storage air from the space 23 through the duct 63 to the downstream side. At this time, moisture is desorbed from the first adsorbent M1 by the high-temperature and low-humidity second heat storage air, whereby the first adsorbent M1 is regenerated, and the heat dissipation operation of the first heat storage tank 20 becomes possible. The exhaust air led out from the first heat storage tank 20 may be heated and humidified, for example, in the heat source 70 (for example, a factory) described above, and then used as a heat medium supplied to the above-described mixed gas, the first heat exchanger 40, and the second heat exchanger 50.

[0054] The timing of the end of the heat storage operation of the first heat storage tank 20 can be determined, for example, by the outlet temperature and humidity of the first heat storage tank 20 (the temperature of the exhaust air led out from the first heat storage tank 20) measured by a temperature and humidity sensor (not shown). Specifically, when the heat storage of the first adsorbent M1 is not completed, the second heat storage air (50.0°C, 9.4% RH) introduced into the first heat storage tank 20 is absorbed in heat and humidified by the first adsorbent M1, and thus is led out as exhaust air that is lower in temperature and higher in humidity than the second heat storage air as described above. On the one hand, as the heat storage of the first heat storage material M1 progresses, the heat absorption and humidification by the first heat storage material M1 are attenuated, and the temperature and humidity of the exhaust air approach the temperature and humidity (50.0 °C, 9.4% RH) of the second heat storage air.

[0055] Therefore, in the heat storage supply device 1, when the temperature and humidity of the exhaust air derived from the first heat storage tank 20 reach a predetermined value compared with the second heat storage air, the heat storage operation of the first heat storage tank 20 may be determined to end. Further, for example, when a predetermined correlation is observed in the change of the temperature and humidity of the exhaust air, the end of the heat storage operation of the first heat storage tank 20 may be determined by time based on the correlation obtained in advance.

[0056] In addition, when the heat storage operation of the first heat storage tank 20 ends, the operator may be notified of the end of the heat storage operation by, for example, issuing an alarm at a predetermined timing. Further, for example, a plurality of first heat storage tanks 20 are arranged in parallel in the heat storage supply device 1, and by controlling the opening and closing of the dampers arranged on the inlet side of each first heat storage tank 20, the supply of the second heat storage air to each first heat storage tank 20 may be automatically switched.

[0057] <Heat storage operation of the second heat storage tank 30 (heat release operation of the first heat storage tank 20)> Next, the heat storage operation of the second heat storage tank 30 will be described. FIG. 3 is a schematic diagram showing the state of the heat storage operation of the second heat storage tank 30.

[0058] In addition, during the heat storage operation of the second heat storage tank 30, as described above, the first heat storage tank 20 functions as an auxiliary heat storage tank for storing heat energy with higher density in the second heat storage tank 30 (the second heat storage material M2). In other words, during the heat storage operation of the second heat storage tank 30, the heat release operation of the first heat storage tank 20 is performed simultaneously.

[0059] During the heat storage operation of the first heat storage tank 20, the heat dissipation operation of the first heat storage tank 20 is performed as described above. Specifically, in the first heat storage tank 20, dampers 22a and 23b are closed, and dampers 23a and 22b are opened. As a result, the outside air OA (16.6°C, 61% RH (7.2 g / kg)) as moist air from the air supply means 10 is sent from the space 23 of the first heat storage tank 20 to the filling portion 21 and passes through the first adsorbent M1 filled in the filling portion 21. At this time, the moisture in the outside air OA is adsorbed by the first adsorbent M1, and as a result, the first adsorbent M1 generates heat, and dry air (32.0°C, 8.5% RH (2.4 g / kg)) that is higher in temperature and lower in humidity than the outside air OA is sent from the space 22 to the first heat exchanger 40 through the duct 63.

[0060] During the heat storage operation of the second heat storage tank 30, a heat medium (60°C) is supplied from a predetermined heat source 70 to the first heat exchanger 40, and the dry air from the first heat storage tank 20 is made into heat storage air (50.0°C, 3.2% RH (2.4 g / kg)) that is at least higher in temperature and lower in humidity than the dry air and is led out toward the second heat storage tank 30.

[0061] Subsequently, in the second heat storage tank 30, dampers 32a and 33b are opened, and dampers 33a and 32b are closed. As a result, the heat storage air from the first heat exchanger 40 is sent from the space 32 of the second heat storage tank 30 to the filling portion 31, passes through the second adsorbent M2 filled in the filling portion 31, and is sent as exhaust air that is lower in temperature and higher in humidity than the heat storage air from the space 33 through the duct 65 to the downstream side. At this time, moisture is desorbed from the second adsorbent M2 by the high-temperature and low-humidity heat storage air, and as a result, the second adsorbent M2 is regenerated, and the heat dissipation operation of the second heat storage tank 30 becomes possible.

[0062] The timing of the end of the heat storage operation of the second heat storage tank 30 can be determined by the outlet temperature and humidity of the second heat storage tank 30 (the temperature of the exhaust air led out from the second heat storage tank 30) measured by a temperature and humidity sensor (not shown) in the same manner as the heat storage operation of the first heat storage tank 20.

[0063] That is, in the heat storage supply device 1, when the temperature and humidity of the exhaust air led out from the second heat storage tank 30 reach a predetermined value compared with the heat storage air, the end of the heat storage operation of the second heat storage tank 30 may be determined. Also, for example, when a predetermined correlation is observed in the change in the temperature and humidity of the exhaust air, the end of the heat storage operation of the second heat storage tank 30 may be determined by time based on the correlation obtained in advance.

[0064] Also, in the heat storage supply device 1, the timing of the end of the heat storage operation of the second heat storage tank 30 may be determined by the outlet temperature and humidity of the first heat storage tank 20 (the temperature of the dry air led out from the first heat storage tank 20) measured by a temperature and humidity sensor (not shown). Specifically, when the heat release of the first adsorbent M1 in the first heat storage tank 20 progresses, the heat release and dehumidification by the first adsorbent M1 are dulled, and the temperature and humidity of the dry air approach the temperature and humidity of the outside air OA as moist air (16.6 °C, 61% RH (7.2 g / kg)).

[0065] Therefore, in the heat storage supply device 1, when the temperature and humidity of the dry air led out from the first heat storage tank 20 reach a predetermined value compared with the outside air OA, the end of the heat storage operation of the second heat storage tank 30 (the heat release operation of the first heat storage tank 20) may be determined. Also, for example, when a predetermined correlation is observed in the change in the temperature and humidity of the dry air, the end of the heat storage operation of the second heat storage tank 30 (the heat release operation of the first heat storage tank 20) may be determined by time based on the correlation obtained in advance.

[0066] When the heat storage operation in the second heat storage tank 30 ends, the operator may be notified of the end of the heat storage operation by, for example, issuing an alarm at a predetermined timing. Also, for example, a plurality of second heat storage tanks 30 may be arranged in parallel in the heat storage supply device 1, and the supply of heat storage air to each second heat storage tank 30 may be automatically switched by controlling the opening and closing of dampers arranged on the inlet side of each second heat storage tank 30.

[0067] <Heat release operation of the second heat storage tank 30> Next, the heat dissipation operation of the second heat storage tank 30 will be described. FIG. 4 is a schematic diagram showing the state of the heat dissipation operation of the second heat storage tank 30.

[0068] During the heat dissipation operation of the second heat storage tank 30, first, the second heat storage tank 30 is removed from the heat storage supply device 1, and the removed second heat storage tank 30 is transported to a desired heat demand location. At the heat demand location, a predetermined inlet duct 66 and an outlet duct 67 are connected to the second heat storage tank 30. An air supply means 68 is provided in the inlet duct 66.

[0069] Subsequently, the dampers 32a and 33b of the second heat storage tank 30 are closed, the dampers 33a and 32b are opened, and at the same time, heat dissipation air (25.0 °C, 60% RH (12.0 g / kg)) is blown toward the second heat storage tank 30 by the air supply means 68. As the heat dissipation air, for example, indoor exhaust air at the heat demand location can be used. As a result, the heat dissipation air from the air supply means 68 is sent from the space 33 of the second heat storage tank 30 to the filling portion 31 and passes through the second adsorbent M2 filled in the filling portion 31. At this time, the moisture in the heat dissipation air is adsorbed by the second adsorbent M2, whereby the second adsorbent M2 generates heat and is discharged as exhaust air that is higher in temperature and lower in humidity than the heat dissipation air from the space 32 through the outlet duct 67. The exhaust air derived from the second heat storage tank 30 is used as high-temperature and low-humidity air for heat energy utilization at the heat demand location.

[0070] The timing of the end of the heat dissipation operation of the second heat storage tank 30 can be determined by the outlet temperature and humidity of the second heat storage tank 30 (the temperature of the exhaust air derived from the second heat storage tank 30) measured by a temperature and humidity sensor (not shown), similar to the heat dissipation operation of the first heat storage tank 20.

[0071] That is, in the heat storage supply device 1, when the temperature and humidity of the exhaust air derived from the second heat storage tank 30 reach a predetermined value compared to the heat dissipation air, the end of the heat dissipation operation of the second heat storage tank 30 may be determined. For example, when a predetermined correlation is observed in the change in the temperature and humidity of the exhaust air, the end of the heat dissipation operation of the second heat storage tank 30 may be determined by time based on the correlation obtained in advance.

[0072] When the heat dissipation operation of the second heat storage tank 30 ends, for example, an alarm may be issued at a predetermined timing to notify the operator of the end of the heat dissipation operation. For example, a plurality of second heat storage tanks 30 may be arranged in parallel at the heat demand site, and the supply of heat dissipation air to each second heat storage tank 30 may be automatically switched by controlling the opening and closing of dampers arranged on the inlet side of each second heat storage tank 30.

[0073] The second heat storage tank 30 in which the heat dissipation operation has been performed at the heat demand site as described above may then be subjected to a heat storage operation in the heat storage supply device 1 as the first heat storage tank 20. In other words, the first heat storage tank 20 and the second heat storage tank 30 in the heat storage supply device 1 may be configured such that their arrangements can be switched according to the purpose.

[0074] During the heat dissipation operation of the second heat storage tank 30, that is, when the second heat storage tank 30 is removed from the heat storage supply device 1, the heat storage operation of the first heat storage tank 20 may be performed as described above. In such a case, the outside air OA used for the heat storage operation of the first heat storage tank 20 can be passed downstream through, for example, the duct 64c as a bypass path remaining in the heat storage supply device 1.

[0075] The heat storage operation and the heat dissipation operation of each of the first heat storage tank 20 and the second heat storage tank 30 using the heat storage supply device 1 according to the technology of the present disclosure are performed as described above.

[0076] According to the heat storage supply device 1 according to the above embodiment, a plurality of heat storage tanks are arranged in multiple stages, and during the heat storage operation of the heat storage tank arranged at the most downstream among the plurality of heat storage tanks, the other heat storage tanks on the upstream side are subjected to heat dissipation operations. Accordingly, when performing heat storage operation using a single heat storage tank as in the prior art, or when performing heat storage operation in all of the plurality of heat storage tanks arranged in multiple stages as in the prior art, compared to these cases, the humidity of the heat storage air introduced into the most downstream heat storage tank, which is the heat storage target, and the second heat storage tank 30 in the present embodiment can be reduced. As a result, even when the temperature of the heat medium supplied from the heat source 70 is lower compared to the prior art, for example, about 60°C, the second adsorbent M2 can be appropriately heat-stored. Also at this time, the heat storage density in the second heat storage tank 30 can be made higher compared to the prior art.

[0077] FIG. 5 is a graph showing the change over time of each heat dissipation temperature when the heat storage tanks are arranged in one stage as a comparative example and when the heat storage tanks are arranged in two stages as an example. FIG. 6 is a graph showing the change over time of each dehumidifying capacity (absolute humidity) when the heat storage tanks are arranged in one stage as a comparative example and when the heat storage tanks are arranged in two stages as an example. In the present embodiment, when performing the heat storage operation of the downstream heat storage tank among the heat storage tanks arranged in two stages as described above, the upstream heat storage tank performed a heat dissipation operation.

[0078] As shown in FIGS. 5 and 6, by performing the heat storage operation of the downstream heat storage tank by the method as in the above-described example, the heat storage density in the downstream heat storage tank could be improved. Specifically, when performing the heat dissipation operation of the downstream heat storage tank, the heat dissipation temperature could be raised higher than that in the comparative example, so that the heat dissipation air could be heated to a higher temperature, and the dehumidifying capacity could be improved compared to the comparative example, so that the humidity of the heat dissipation air could be further reduced. As a result of the inventors' study, it was found that when the conventional heat storage tanks were arranged in one stage (comparative example), the heat storage density was approximately 150 KJ / L, whereas when the heat storage operation of the downstream heat storage tank was performed by the above method (example), the heat storage density became approximately 200 KJ / L.

[0079] Further, according to the heat storage supply device 1 according to the above embodiment, even when the heat source 70 has an unstable exhaust heat temperature, specifically, when the exhaust heat temperature changes with time, the heat storage operation in the heat storage tank (the second heat storage tank 30) arranged on the downstream side can be appropriately performed.

[0080] Specifically, in the case where the heat storage tanks are arranged in one stage as in the prior art, if the exhaust heat temperature from the heat source 70 is not stable, when performing the heat storage operation of the heat storage tank, the temperature of the moist air heated by the heat medium (exhaust heat) from the heat source 70, that is, the temperature of the heat storage air introduced into the heat storage tank, is not stable. As a result, there is a risk that moisture cannot be appropriately desorbed from the adsorbent. In this regard, according to the heat storage supply device 1 according to the above-described embodiment, prior to heating the moist air by the heat medium (exhaust heat) from the heat source 70 during the heat storage operation of the heat storage tank (the second heat storage tank 30) to be heat-stored, the auxiliary heat storage tank (the first heat storage tank 20) makes the moist air into dry air that is higher in temperature and lower in humidity than the moist air in advance. Thereby, even when the exhaust heat temperature from the heat source 70 is not stable, desorption of moisture from the second adsorbent M2 can proceed with the dry air, and when the dry air can be made into heat storage air that is even higher in temperature and lower in humidity by the heat medium from the heat source 70, the desorption efficiency of moisture from the second adsorbent M2 can be further improved.

[0081] In the above embodiment, the case where the heat medium temperature introduced from the heat source 70 into various heat exchangers has a relatively low temperature range of about 40°C to 60°C has been described as an example. However, the heat medium temperature from the heat source 70 is not limited to this. That is, even when the heat medium temperature from the heat source 70 has a high temperature range of 100°C or higher as in the prior art, by performing two-stage heat storage according to the present invention, the heat dissipation temperature of the second adsorbent M2 can be increased, and the heat dissipation amount from the second adsorbent M2 can be increased.

[0082] Further, in the above embodiment, as shown in FIG. 1, two heat storage tanks (the first heat storage tank 20 and the second heat storage tank 30) are arranged side by side. However, the number of heat storage tanks to be arranged is not limited to this, and the heat storage supply device may have three or more heat storage tanks.

[0083] <First Modification Example of Heat Storage Supply Device> Specifically, for example, like the heat storage supply device 100 shown in FIG. 7, the first heat storage tank 20, the second heat storage tank 30, and the third heat storage tank 110 that houses the third adsorbent M3 inside may be arranged side by side. A first heat exchanger 40 is arranged between the first heat storage tank 20 and the second heat storage tank 30. Also, a third heat exchanger 120 is arranged between the second heat storage tank 30 and the third heat storage tank 110. In the heat storage supply device 100, during the heat storage operation in the third heat storage tank 110 arranged at the most downstream, the first heat storage tank 20 and the second heat storage tank 30 are operated for heat dissipation.

[0084] In the heat storage supply device 100 shown in FIG. 7, the outside air OA as moist air derived from the air supply means 10 is passed through the first heat storage tank 20 and the first heat exchanger 40 in this order, and is introduced into the second heat storage tank 30 as heat storage air in the same manner as in the above embodiment. Subsequently, in the second heat storage tank 30, by performing a heat dissipation operation, the taken-in heat storage air is led out toward the third heat exchanger 120 as new heat storage air that is at least at a higher temperature and lower humidity than the heat storage air. In the third heat exchanger 120, the new heat storage air from the second heat storage tank 30 is further heat-exchanged with the heat medium from the heat source 70, the new heat storage air is further heated and dehumidified, and is led out toward the third heat storage tank 110. Subsequently, in the third heat storage tank 110, the new heat storage air from the third heat exchanger 120 is passed through the third adsorbent M3, and is led out from the outlet side as exhaust air that is at a lower temperature and higher humidity than the new heat storage air. At this time, moisture is desorbed from the third adsorbent M3 by the new heat storage air at a high temperature and low humidity, whereby the third adsorbent M3 is regenerated, and the heat dissipation operation of the third heat storage tank 110 becomes possible.

[0085] According to this embodiment, the heat storage air derived from the first heat exchanger 40 in this way is introduced into the third heat storage tank 110 to be heat stored as new heat storage air with an even higher temperature and lower humidity by the heat dissipation operation of the second heat storage tank 30 and the third heat exchanger 120. As a result, air with a lower humidity can flow through the third adsorbent M3 compared to the above embodiment, and as a result, the heat storage density in the third heat storage tank 110 can be further improved.

[0086] FIG. 8 is a graph showing the change over time of the heat dissipation temperature in each case where the heat storage tanks are arranged in one stage as a comparative example, the heat storage tanks are arranged in two stages as Example 1, and the heat storage tanks are arranged in three stages as Example 2.

[0087] As shown in FIG. 8, by increasing the number of heat storage tanks arranged side by side and performing heat dissipation operations in all of the other upstream heat storage tanks during the heat storage operation of the lowermost heat storage tank, the heat storage density in the lowermost heat storage tank could be further improved. Specifically, the heat dissipation temperature during the heat dissipation operation of the downstream heat storage tank was further increased, and the heat dissipation air could be heated to a higher temperature.

[0088] In the example shown in FIG. 7, the first heat exchanger 40 was arranged between the first heat storage tank 20 and the second heat storage tank 30. However, when arranging three or more heat storage tanks side by side as in this modified example, the first heat exchanger 40 between the first heat storage tank 20 and the second heat storage tank 30 may be omitted. More specifically, when arranging three or more heat storage tanks side by side in this way, a heat exchanger (the third heat exchanger 120 in the example of FIG. 7) may be arranged between at least two heat storage tanks arranged on the lowermost stream side (the second heat storage tank 30 and the third heat storage tank 110 in the example of FIG. 7).

[0089] <Modified Example 2 of the Heat Storage Supply Device> Specifically, for example, as shown in FIG. 9, the heat storage supply device 200 arranges the first heat storage tank 20 and the second heat storage tank 30 side by side (the first heat storage line), and independently of the first heat storage line, the third heat storage tank 210 and the fourth heat storage tank 220 may be arranged side by side (the second heat storage line). In such a case, the second heat storage line includes a second air supply means 230 for blowing moist air into the third heat storage tank 210, and a fourth heat exchanger 240 disposed between the third heat storage tank 210 and the fourth heat storage tank 220.

[0090] In the heat storage supply device 200, during the heat storage operation in the fourth heat storage tank 220 that is the heat storage target, the first heat storage tank 20, the second heat storage tank 30, and the third heat storage tank 210 are operated for heat dissipation.

[0091] More specifically, in the first heat storage line of the heat storage supply device 200, the outside air OA as moist air derived from the air supply means 10 is passed through the first heat storage tank 20 performing heat dissipation operation, the first heat exchanger 40, and the second heat storage tank 30 performing heat dissipation operation in this order, and then is derived from the outlet side of the second heat storage tank 30 as heat dissipation air that is higher in temperature and lower in humidity than the outside air OA. On the other hand, in the second heat storage line of the heat storage supply device 200, first, the outside air OA as moist air derived from the second air supply means 230 is passed through the third heat storage tank 210 performing heat dissipation operation, and then is derived toward the fourth heat exchanger 240 as second dry air that is higher in temperature and lower in humidity than the outside air OA. In the fourth heat exchanger 240, the second dry air from the third heat storage tank 210 is heat-exchanged with the heat dissipation air from the second heat storage tank 30 supplied as a heat medium, and the second dry air is derived toward the fourth heat storage tank 220 as third heat storage air that is at least higher in temperature and lower in humidity than the second dry air. And in the fourth heat storage tank 220, the third heat storage air from the fourth heat exchanger 240 is passed through the fourth adsorbent M4, and is derived from the outlet side as exhaust air that is lower in temperature and higher in humidity than the third heat storage air. At this time, moisture is desorbed from the fourth adsorbent M4 by the third heat storage air that is high in temperature and low in humidity, whereby the fourth adsorbent M4 is regenerated, and the heat dissipation operation of the fourth heat storage tank 220 becomes possible.

[0092] Also in this embodiment, the second dry air derived from the third heat storage tank 210 in this manner is introduced into the fourth heat storage tank 220 to be heat stored as the third heat storage air with even higher temperature and lower humidity by heat exchange in the fourth heat exchanger 240. As a result, air with even lower humidity can flow through the fourth adsorbent M4 as compared with the above-described embodiment (heat storage supply device 1). As a result, the heat storage density in the fourth heat storage tank 220 can be further improved.

Industrial Applicability

[0093] The present invention is useful for a heat storage supply device having a heat storage tank containing an adsorbent that generates heat by adsorbing an adsorbate.

Explanation of Signs

[0094] 1 Heat storage supply device 10 Air supply means 20 First heat storage tank 21 Filling portion 22, 23 Spaces 30 Second heat storage tank 31 Filling portion 32, 33 Spaces 40 First heat exchanger 50 Second heat exchanger 61, 62, 63, 64, 65 Ducts M1 First adsorbent M2 Second adsorbent

Claims

1. An air supply means for supplying moist air, A first heat storage tank that contains a first adsorbent that generates heat by adsorbing an adsorbate and discharges the introduced moist air as dry air that is hotter and less humid than the moist air, A drying heat exchanger that discharges the introduced dry air as heat storage air that is hotter and less humid than the dry air by heat exchange with a heat medium supplied from a heat source, A heat storage supply device, comprising: a second heat storage tank that contains a second adsorbent that generates heat by adsorbing an adsorbate and stores heat of the second adsorbent with the introduced heat storage air.

2. The heat storage supply device according to claim 1, further comprising: a second drying heat exchanger that discharges the introduced moist air as second heat storage air that is hotter and less humid than the moist air to the first heat storage tank by heat exchange with a heat medium supplied from a heat source when storing heat in the first adsorbent.

3. The heat storage supply device according to claim 2, wherein the heat medium supplied to at least one of the drying heat exchanger or the second drying heat exchanger is heat supplied from a renewable energy source or predetermined exhaust heat.

4. The heat storage supply device according to claim 2 or 3, wherein the temperature of the heat medium supplied to at least one of the drying heat exchanger or the second drying heat exchanger is 40°C to 60°C.

5. The heat storage supply device according to any one of claims 1 to 4, further comprising: a third heat storage tank that contains a third adsorbent that generates heat by adsorbing an adsorbate and discharges the introduced heat storage air as new heat storage air that is hotter and less humid than the heat storage air to the second heat storage tank.

6. A second air supply means for supplying moist air, A third heat storage tank that contains a third adsorbent that generates heat by adsorbing an adsorbate and discharges the introduced moist air as second dry air that is hotter and less humid than the moist air, A third drying heat exchanger that discharges the introduced second dry air as third heat storage air that is hotter and less humid than the second dry air by heat exchange with a heat medium supplied from a heat source, The heat storage supply device further comprises: a fourth heat storage tank that contains a fourth adsorbent that generates heat by adsorbing an adsorbate and stores heat of the fourth adsorbent with the introduced third heat storage air. The heat medium supplied to the third heat exchanger for drying is the heat-radiating air heated by the heat radiation of the second adsorbent material stored in the second heat storage tank, and the heat storage supply device according to any one of claims 1 to 4 is characterized in that.

7. The heat storage supply device according to any one of claims 1 to 6, further comprising a transport means for transporting the second heat storage tank between the heat demand site.

8. The heat storage supply device according to any one of claims 1 to 7, further comprising a control means for measuring at least one of the heat storage and release time or the heat storage and release temperature of the second adsorbent material and controlling the heat storage and release of the second adsorbent material based on the result of the measurement.

9. The heat storage supply device according to claim 8, wherein the control means notifies an alarm at the timing of completion of heat storage and release of the second adsorbent material.

10. A heat storage material filled and used in a heat storage supply device, The heat storage supply device, An air supply means for supplying moist air, A first heat storage tank for introducing the introduced moist air and discharging it as dry air having a higher temperature and lower humidity than the moist air, A heat exchanger for drying for introducing the introduced dry air and discharging it as heat storage air having a higher temperature and lower humidity than the dry air by heat exchange with a heat medium supplied from a heat source, A second heat storage tank for introducing the introduced heat storage air and discharging it as exhaust air having a lower temperature and higher humidity than the heat storage air, The heat storage material is characterized in that moisture of the moist air is adsorbed and heat is radiated inside the first heat storage tank, and the moisture is desorbed and heat is stored by the heat storage air inside the second heat storage tank.

11. A heat storage and release method performed using a heat storage supply device, A step of introducing moist air introduced into a first heat storage tank as dry air having a higher temperature and lower humidity than the moist air by an adsorption reaction of a first adsorbent material housed inside the first heat storage tank, A step of converting the dry air derived from the first heat storage tank into heat storage air having a higher temperature and lower humidity than the dry air by heat exchange with a heat medium supplied from a heat source, A step of introducing the heat storage air into a second heat storage tank and allowing a desorption reaction of a second adsorbent material housed inside the second heat storage tank to proceed, and a heat storage and release method characterized by having.

12. A step of removing the second heat storage tank in which the desorption reaction of the second adsorbent material has been performed from the heat storage supply device and transporting it to a heat demand site, A step of introducing heat-radiating air into the second heat storage tank in the heat demand area and generating exhaust air that is higher in temperature and lower in humidity than the heat-radiating air by the adsorption reaction of the second adsorbent, characterized in that the heat storage and release method according to claim 11 includes this step.

13. The heat storage and release method according to claim 12, characterized in that the second heat storage tank in which the adsorption reaction of the second adsorbent has taken place is connected to the heat storage supply device as the first heat storage tank, and the adsorption reaction of the second adsorbent is carried out.

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