JP2019095126A - Heat storage system - Google Patents

Abstract

To provide a heat storage system effective to improve a reaction speed in an adsorption heat storage system using a granular solid heat storage material.SOLUTION: A heat storage system including a reactor (10) having an outer surface (10a) kept into contact with a primary medium (G) as a heat source, an inner surface (10b) kept into contact with a secondary medium (L) at a back side of the outer surface, and an internal space (10c) defined by the inner surface, and a granular heat storage material (15) housed in the internal space of the reactor, and having a property to generate heat by adsorption reaction of the secondary medium and to accumulate heat by desorption reaction of the secondary medium, further includes a heat transfer member (14) extended from the inner surface to the internal space, the heat transfer member includes a partitioning structure portion (14a) having a void (14p) through which the secondary medium can be circulated and the granular heat storage material cannot be passed, and at least a part of the granular heat storage material is housed in a plurality of areas defined by the partitioning structure portion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a heat storage system, for example, a heat storage system of a vehicle that recovers thermal energy discharged from a vehicle and uses it for warm-up promotion and the like.

  Conventionally, various heat storage systems have been proposed which temporarily store thermal energy discharged from a vehicle and use them for promoting warm-up at the time of cold start, in-vehicle heating, and the like. Patent Document 1 proposes a heat storage system for a vehicle using calcium oxide and magnesium oxide as a heat storage material that generates heat due to a chemical hydration reaction.

JP, 2009-262748, A

  However, the temperature of the heat discharged from the vehicle during city driving is about 90 ° C. steadily in the cooling system and 350 ° C. in the high load case in the exhaust system, but 130 ° C. in idling and about 200 ° C. in steady operation On the other hand, the reaction temperature of the heat storage material used for the chemical hydration reaction is as high as about 500 ° C. for calcium oxide and about 250 ° C. for magnesium oxide, and there is a problem that the amount of recovered heat is small.

  On the other hand, the heat storage material that generates heat due to the adsorption reaction has a somewhat lower heat storage density, but can recover waste heat above the boiling point of the reaction medium and has the merit of being able to recover more waste heat constantly discharged from the vehicle. is there. Specific examples of the heat storage material by adsorption reaction include zeolite, alumina, silica gel, activated carbon and the like.

  However, as a general problem of a heat storage system for vehicles using a solid heat storage material, it is difficult to efficiently transfer the exhaust heat of the vehicle to the heat storage material at the time of heat storage, and evaporate the reaction medium to dry the heat storage material. There is a problem that the speed is slow. Furthermore, for example, when the heat storage material is zeolite particles, and the reaction medium is water, when the zeolite particles absorb water, the water bumps in the particles, and the particles collapse due to rapid volume expansion and the water There is a concern that the calorific value may be reduced due to the outflow of the zeolite powder, and the cooling system may be adversely affected.

  The present invention has been made in view of the above-described points of the prior art, and an object thereof is to provide a heat storage system that is advantageous for improving the reaction speed in an adsorption heat storage system using a particulate solid heat storage material.

In order to solve the above problems, the present invention is
A reactor having an outer surface in contact with a primary medium serving as a heat source, an inner surface in contact with a secondary medium on the back side of the outer surface, and an inner space defined by the inner surface;
A particulate heat storage material which is contained in the internal space of the reactor, generates heat by the adsorption reaction of the secondary medium, and stores heat by the desorption reaction of the secondary medium;
Means for introducing the secondary medium into the interior space to carry out the adsorption reaction;
Means for discharging the secondary medium separated by the desorption reaction from the internal space;
And means for sealing the internal space.
It further comprises a heat transfer member extending from the inner surface to the inner space,
The heat transfer member includes a partition structure having a space through which the secondary medium can flow and the particulate heat storage material can not pass, and the plurality of particulate heat storage materials are partitioned at least partially by the partition structure Are housed in the area of

  Since the heat storage system according to the present invention includes the heat transfer member extending from the inner surface of the reactor to the inner space as described above, the outer surface of the reactor is heated by contact with the primary medium serving as the heat source. The heat transfer member extending from the inner surface of the reactor to the inner space transfers heat from the heat transfer member to the particulate heat storage material during the desorption reaction in which the particulate heat storage material contained in the vessel is heated and dried. Thus, the particulate heat storage material accommodated at the center of the reactor is efficiently heated.

  In particular, the heat transfer member includes a partition structure having a space through which the secondary medium can flow and the particulate heat storage material can not pass, and the particulate heat storage material is divided into a plurality of regions at least partially partitioned by the partition structure. As it is contained, reliable contact between the particulate heat storage material contained inside the reactor and the heat transfer member is obtained, and direct heat conduction is advantageous in shortening the time required for drying (heat storage). It is.

It is a block diagram which shows the exhaust system and cooling system of a vehicle provided with the thermal storage system which concerns on this invention embodiment. It is a schematic perspective view which shows the reactor of the thermal storage system which concerns on this invention embodiment. It is a schematic perspective view which shows the heat-transfer member of the reactor which concerns on this invention embodiment. (A) is an AA partial cross section of FIG. 1 which shows this invention embodiment, (b) is a fragmentary sectional view equivalent to the AA cross section of FIG. 1 which shows a comparative example. (A) is this invention 2nd Embodiment, (b) is a typical perspective view which shows the heat-transfer member of the reactor concerning this invention 3rd embodiment. It is a graph which shows the relationship between the drying time and temperature of the thermal storage material in the thermal storage system which concerns on this invention embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Basic configuration of heat storage system)
FIG. 1 shows an exhaust system and a cooling system of a vehicle in which the heat storage system according to the present invention is implemented. In FIG. 1, the vehicle is an internal combustion engine vehicle equipped with an internal combustion engine 1 as a power unit, The heat discharged from the internal combustion engine 1 together with the exhaust gas (primary medium) is recovered and stored, and the coolant (secondary medium) is heated at the cold start time to be utilized for warm-up promotion.

  In the exhaust system of the internal combustion engine 1, a catalyst unit 21 filled with a catalyst for removing nitrogen oxides (NOx) and the like in the exhaust gas is interposed in the middle of an exhaust pipe 20 extending from the combustion chamber 1a. The outside air is communicated through an outer cylinder 22 (expanded diameter portion) covering a reactor 10 constituting the heat storage unit, a muffler (not shown), and the like.

  The cooling system of the internal combustion engine 1 is a coolant circulation path L1, L2 for circulating the coolant through a cooling jacket 1b provided outside the combustion chamber 1a, a pump P1, and a radiator for cooling the coolant by a traveling wind of a vehicle or a fan. Mainly composed of two. A bypass path L3 for bypassing the radiator 2 is connected in parallel to the coolant circulation path L2, and a thermostud 3 is interposed at the branch point, and the thermostud 3 bypasses the coolant according to the temperature of the coolant. The temperature is switched to L3 to adjust the temperature of the coolant to prevent the overcooling of the internal combustion engine 1.

  The reservoir 2 is connected to the radiator 2 via a pressure control valve (not shown), and when the pressure in the radiator 2 exceeds the set value, the coolant is discharged to the reservoir 4 and the pressure becomes less than the set value. Then, the coolant in the reservoir tank 4 is configured to return to the radiator 2 (coolant circulation path L2). In addition, a purge path L13 of the reactor 10 described later is also connected to the reservoir tank 4.

  In the coolant circulation paths L1 and L2, heater cores 5 for utilizing the heat of the coolant heated by the internal combustion engine 1 for heating the vehicle interior are connected in parallel by a coolant circulation path L5. A reactor 10 constituting a heat storage unit is connected in parallel to the coolant circulation path L5 via a coolant circulation path L10 branched off via the switching valve 11.

  The reactor 10 is surrounded by an outer cylinder 22 composed of an enlarged diameter portion of the exhaust pipe 20, and is heated from the outside by the exhaust gas (primary medium) in the exhaust pipe 20, and a heat storage material filled therein While the heat of exhaust gas is stored by the desorption reaction of 15, heat is generated by the adsorption reaction to the cooling fluid circulated through the cooling fluid circulation path L10 at the cold start, thereby heating the cooling fluid and promoting warm-up .

  The switching valve 11 (1) closes the coolant circulation path L10 to the reactor 10 and communicates the coolant circulation paths L1 and L2 with the coolant circulation path L5 of the heater core 5, (2) the heater core 5 To the second position in which the coolant circulation paths L1 and L2 are communicated with the coolant circulation path L10 of the reactor 10, and the coolant circulation paths L5 and L10 are fully closed. It is a three-way valve that can switch three positions.

  The auxiliary pump P2 is connected to the downstream side of the reactor 10 via the discharge valve 12, and the switching valve 11 is set to the second position for communicating with the coolant circulation path L10, and the discharge valve 12 is opened. Is closed and the auxiliary pump P2 is operated, the coolant is drawn into the reactor 10 through the coolant circulation path L10 and circulated to the coolant circulation path L1 of the internal combustion engine 1. The shortage of the coolant accompanying this is replenished from the reservoir tank 4.

  In the upper part of the reactor 10, a coolant circulation path L13 for returning the vapor phase coolant vaporized in the reactor 10 and separated from the heat storage material 15 back to the reservoir tank 4 for condensation via the purge valve 13 It is connected.

  The switching valve 11, the discharge valve 12, and the purge valve 13 are constituted by a valve provided with an actuator operable by control of a control unit (ECU) (not shown), for example, a solenoid valve. The flow path switching and the open / close control are performed at a predetermined timing together with the pump P1 and the auxiliary pump P2 based on the temperature of the above.

(Heat storage unit)
FIG. 2 shows the vicinity of the reactor 10 constituting the heat storage unit according to the first embodiment of the present invention. The reactor 10 is a cylindrical closed vessel coaxially disposed inside the enlarged diameter portion (outer cylinder 22) of the exhaust pipe 20, and the upper portion of the reactor 10 penetrates the outer cylinder 22 to form a coolant circulation path. L10 (introduction side) and the purge path L13 are connected, and a coolant circulation path L10 (discharge side) is connected to the lower portion of the reactor 10 through the outer cylinder 22.

  A heat transfer member 14 is disposed inside the reactor 10. As shown in FIG. 3, the heat transfer member 14 includes a plurality of (eight in the illustrated example) partition structure portions 14a extending from the inner surface of the reactor 10 toward the center of the inner space, and each partition structure portion 14a A granular heat storage material 15 is filled in a plurality of (nine in the illustrated example) regions partitioned by the cylindrical central portion 14 c integrally coupled on the side.

  In other words, the heat transfer member 14 has a small-diameter central portion 14c coaxially disposed at the central portion of the internal space of the cylindrical reactor 10, and a plurality of radial transfer members extending radially outward from the central portion 14c. Is constituted by the partition structure 14a. The radial arrangement of the partition structure portion 14a also has an advantage of not inhibiting radiation from the inner surface of the reactor 10 which is to be a heat exchange surface.

  The partition structure portion 14a and the central portion 14c constituting the heat transfer member 14 are formed of a metal mesh or a porous metal plate, and an air gap 14p penetrating them in the thickness direction is formed entirely. The cooling fluid (secondary medium) can easily flow through the granular heat storage material 15 contained in between, but the size and shape of the void 14p is such that the granular heat storage material 15 can not pass through. Thus, reliable contact between the heat transfer member 14 and the particulate heat storage material 15 is obtained. Also in order to secure the heat capacity that the heat transfer member 14 can conduct individual heat conduction, it is preferable that the space 14p be as small as possible (within a range not inhibiting the flow of the coolant).

  The reactor 10 including the heat transfer member 14 configured as described above generates heat due to the adsorption reaction of the cooling fluid (secondary medium), and the desorption reaction of the particulate heat storage material 15 having the property of storing heat due to the desorption reaction; That is, the configuration is advantageous for improving the heat transfer to the heat storage material 15 in the reaction of heating by the heat of the exhaust gas (primary medium) and causing the adsorbed cooling fluid to separate and store heat, thereby improving the drying speed of the heat storage material 15. It has become.

  The heat storage material 15 filled in the reactor 10 is formed into a bead shape in consideration of the rate of the adsorption reaction of the cooling fluid (secondary medium), and such particulate heat storage material 15 has the heat of the exhaust gas The heat is transferred to the heat storage material 15 by solid heat conduction and radiation through the surface of the reactor 10, and the heat storage material 15 is heated, whereby the coolant (secondary medium) is separated and dried.

  However, since the particulate heat storage materials 15 are in point contact with each other and the heat conductivity of the heat storage materials 15 is low, the heat conduction effect is low. Therefore, as shown in the comparative example of FIG. 4B, the heat of the exhaust gas G is not easily transmitted to the heat storage material 15 filled in the central portion 10c of the reactor 10 ', and there is a problem that it takes time for desorption and drying.

  On the other hand, in the embodiment of the present invention, as shown in FIG. 4 (a), the heat conduction through the heat transfer member 14 extending from the inner surface 10b of the reactor 10 toward the central portion 10c The heat of the exhaust gas G is easily transmitted to the heat storage material 15 filled in the central portion 10c, and the time required for desorption and drying can be shortened.

  In order to verify the effect of the heat transfer member 14 configured as above, the reactor 10 filled with the particulate heat storage material 15 by applying the heat transfer member 14 and the particulate heat storage without applying the heat transfer member 14 The reactor 10 'filled with only the material 15 was heated from the outside, and an experiment was conducted to investigate the temperature change of the heat storage material in the central part of each reactor.

  In this experiment, 700 g (approximate volume: about 0.9 L) of zeolite beads as a particulate heat storage material is charged into the reactor 10, 10 ', and a cooling liquid is injected into the reactor to cause adsorption reaction on the zeolite beads. Thereafter, after the heated coolant was discharged, the reactor 10, 10 'was placed in a 250 ° C. atmosphere and heated from the outside, and the temperature of the central portion was measured.

  FIG. 6 is a graph showing the measurement results of the zeolite temperature in the central portion of the reactor, in which the solid line shows an example corresponding to FIG. 4 (a) and the broken line shows a comparative example corresponding to FIG. 4 (b). In this example, the time required to reach 250 ° C. of the heat source temperature was reduced by 36% from 4.5 hours to 2.9 hours. Also, the graph shows that the temperature rises to 100 ° C once and then tends to rise again through the engine stagnating at around 100 ° C, but during this stagnation period, the heat storage material on the peripheral side of the reactor It is inferred from this that the desorbing reaction proceeds, and then the desorbing reaction in the central portion is reflected, and the heat transfer member in the example is applied to the central portion compared to the comparative example. It can be said that it shows that heat transfer is improved.

(Heat storage material and secondary medium)
The heat storage material 15 filled in the reactor 10 is a heat storage material composed of solid particles that generates heat due to the adsorption reaction of the gas phase or liquid phase medium (secondary medium), and stores heat due to the desorption reaction. In addition to the above-mentioned zeolites, silica gel, activated alumina and the like can be used as the above. However, from the practical viewpoint, zeolite is preferable.

  Zeolites include X-type zeolite, Y-type zeolite, ZSM-5 type zeolite, A-type zeolite and the like, and in particular, A-type or X-type zeolite is preferable. As the shape of the particles, beads (spherical), pellets (cylindrical) or the like can be used.

  On the other hand, as a secondary medium (cooling liquid) used in combination with the adsorption heat storage material, a mixed medium of a first medium and a second medium as described below is suitable.

The first medium is a medium that is the main component of the mixed medium, has a boiling point lower than that of the second medium, has a higher adsorption capacity for the heat storage material than the second medium, and is adsorbed by adsorption to the heat storage material The heat is a medium larger than the second medium. As such a first medium, there are water (H ₂ O), ammonia (NH ₃ ) and the like, but water is preferable from the practical viewpoint.

The second medium is a medium that is a secondary component of the mixed medium. As the second medium, ethylene glycol (C ₂ H ₆ O ₂ ), propylene glycol (C ₃ H ₈ O ₂ ), methanol (CH ₄ OH), etc. are assumed, but from a practical viewpoint, ethylene glycol Is preferred.

  The mixing ratio of the first medium to the second medium may be any mixing ratio that allows the first medium and the second medium to be adsorbed to the heat storage material and to be evaporated by the temperature rise of the heat storage material. For example, when the first medium is water and the second medium is ethylene glycol, the weight percent of the second medium can be 10 to 90%. In practice, the weight percent of the second medium is between 20 and 60%.

  In the heat storage system using the mixed medium as described above as the secondary medium (coolant), the heat storage material 15 is humidified by the mixed medium to generate heat, and the heat is extracted from the heat storage material 15 to the mixed medium. At the time of heat generation of the heat storage material 15, the heat generation amount of the heat storage material by the second medium in the mixed medium is smaller than the heat generation amount of the heat storage material by the first medium. Therefore, compared with the case where only the first medium is humidified, the temperature rising speed of the heat storage material 15 is suppressed, and as a result, the occurrence of bumping phenomenon when the heat storage material generates heat and the collapse and outflow of the heat storage material Can be prevented, and a decrease in heat generation due to a decrease in heat storage material can be avoided.

  In addition, when the humidification of the heat storage material by the mixed medium is further continued, the first medium is the second medium because the adsorption capacity of the first medium in the mixed medium to the heat storage material is higher than the heat storage material of the second medium. Replace the medium of During this substitution, an endothermic reaction in which the second medium desorbs from the heat storage material and an exothermic reaction in which the first medium adsorbs on the heat storage material simultaneously occur.

  As a result, positive heat quantity represented by “(heat of adsorption of first medium) − (heat of adsorption of second medium)” is continuously generated, and the temperature of the heat storage material and the mixed medium is It rises as far as the reaction continues. The second medium adsorbed to the heat storage material is not completely replaced by the first medium even if it is continuously humidified by the unreacted new mixed solvent. When the second medium remains in the heat storage material in a proportion, the reaction of the replacement does not proceed, and the heat storage material does not generate heat.

(Operation of heat storage system)
Next, the operation of the heat storage system according to the above embodiment will be described with reference to FIG. 1 with an example of a warm-up acceleration mode at cold start of the internal combustion engine vehicle equipped with the system and a heat storage mode after start.

  In a vehicle stopped after normal traveling, the desorption reaction of the heat storage material 15 in the reactor 1 is completed by the heat storage mode to be described later, and the three-way valve 11, the discharge valve 12, and the purge valve 13 are closed. It is maintained.

  When the internal combustion engine 1 of such a vehicle is cold-started at a coolant temperature lower than a predetermined temperature, the heat storage system enters the warm-up acceleration mode by the control of the control unit (ECU), and the three-way valve 11 After switching to L10, the discharge valve 12 is opened, the pump P1 and the auxiliary pump P2 are activated, and the coolant flows from the coolant circulation path L10 into the reactor 10 as indicated by a symbol La in FIG.

  Next, the heat storage material 15 is humidified by the coolant flowing into the reactor 10, and is adsorbed to the heat storage material 15, so that the heat of adsorption due to the adsorption reaction of the heat storage material 15 is generated. The temperature of the coolant is heated and circulated through the discharge valve 12, the auxiliary pump P2 and the pump P1 to the cooling jacket 1b of the coolant circulation path L1, thereby promoting the warm-up of the internal combustion engine 1. The coolant that has passed through the internal combustion engine 1 is recirculated to the reactor 10 through the coolant circulation path L10, and the coolant is further heated.

  In the warm-up promotion mode as described above, when the warm-up of the internal combustion engine 1 is completed, the switching valve 11 is switched to the coolant circulation path L5, and the circulation of the coolant to the reactor 10 is stopped. Is opened, and the coolant remaining in the reactor 10 is discharged to the coolant circulation path L1 by the auxiliary pump P2, as indicated by a symbol Lb in FIG.

  The discharged coolant is an increase in the volume of the coolant flowing into the reservoir tank 4. Note that the coolant heated and heated in the warm-up mode is circulated to the heater core 5 of the coolant circulation path L5, and is used for heating the vehicle interior. The heater core 5 functions as a heat exchanger that suppresses the temperature rise of the coolant, but when the temperature of the coolant further rises, the thermostud 3 switches from the bypass path L3 to the coolant circulation path L2, and the radiator 2 Is cooled.

  On the other hand, when the discharge of the coolant from the reactor 10 is completed, the auxiliary pump P2 is stopped and the discharge valve 12 is closed, and the reactor 10 shifts to the heat storage mode.

  That is, the reactor 10 is heated in the enlarged diameter portion 22 of the exhaust pipe 20 by the exhaust gas (Ga-Gb) exhausted from the warmed internal combustion engine 1, and the heat storage material 15 in the reactor 11 is heated. As a result, the cooling liquid adsorbed to the heat storage material 15 vaporizes and separates, and the heat storage material 15 is dried due to this desorption reaction, whereby the thermal energy of the exhaust gas is stored in the heat storage material 15.

  The gas-phase coolant separated from the heat storage material 15 is collected in the reservoir tank 4 through the purge path L13 and condensed as shown by a symbol Lc in FIG. When the desorption reaction and drying of the heat storage material 15 are completed and the internal combustion engine 1 of the vehicle is shut off, the purge valve 13 is closed to seal the reactor 10 to prevent moisture absorption of the heat storage material 15 for the next start. Prepare.

  In the heat storage system according to the present invention, the heat transfer member 14 is installed in the reactor 10, whereby the particulate heat storage material 15 inside the reactor 10, in particular, the heat storage material 15 in the central portion is efficiently heated. Since the drying time (heat storage time) of the heat storage material 15 is shortened, rapid and reliable warm-up can be promoted even when cold start is repeated in a relatively short cycle.

Second Embodiment
Next, FIG. 5A shows a heat conducting member 214 of the reactor 210 of the second embodiment according to the present invention. In the heat conducting member 214, no cylindrical portion is set at the center, and the respective partition structure portions 214a are joined at the central portion 214c. In this embodiment, the partition structure portions 214a adjacent to each other at the central portion 214c intersect at an acute angle while the structure is simple, so that the filling efficiency of the particulate heat storage material 15 in the vicinity thereof is reduced.

  In the first embodiment, since the cylindrical central portion 14 c is set, such an acute-angled coupling portion does not occur, and the overall filling efficiency of the heat storage material 15, and the heat conducting member 14 and the heat storage material 15. It can be seen that the heat conducting member 14 of the first embodiment is advantageous in any of the contact efficiencies of the first embodiment. Furthermore, the heat conducting member 14 of the first embodiment is advantageous also in terms of structural stability.

  In the heat conducting members 14 and 214 of the first embodiment and the second embodiment, metal wires are arranged in a square grid shape, and wire meshes (welded mesh, flat mesh) having square gaps 14p and 214p are exemplified. However, woven wire mesh such as plain weave or crimp weave can also be used.

  Also, as the porous metal plate (punching metal), various shapes such as round holes and square holes can be used, but in consideration of the thermal conductivity in the radial direction (radial direction), the radial direction (lateral direction) In these cases, round holes, square holes, and long holes become voids 14p and 214p.

Third Embodiment
Next, FIG. 5 (b) shows the heat conducting member 314 of the reactor 310 of the third embodiment according to the present invention. The heat conducting member 314 is divided only by a large number of metal wires extending in parallel to the radial direction (radial direction), in consideration of the thermal conductivity in the radial direction (radial direction) instead of the metal mesh or the porous metal plate. The structural portion 314a (louver) is configured, and the air gap 314p also extends in the radial direction.

  The respective metal wires (314a) are integrally connected by a central portion 314c made of an axially extending metal wire, but an axially extending wire may be used in combination with the outer peripheral portion. Even in this embodiment, a thermal conductivity similar to that of a metal mesh can be obtained, but if a metal band is used instead of the metal wire, the same heat capacity and thermal conductivity as a porous metal plate can be obtained.

  Although each partition structure part 14a, 214a, 314a showed the case where the partition structure part 14a, 214a, 314a was orientated to radial direction in each said embodiment, it is set as the other form extended toward internal space from the inner surface 10b of the reactor 10. You can also. For example, it may extend obliquely from the inner surface 10b of the reactor 10 toward the central portion 14c, and the central portion 14c may be in the form of a rectangular tube other than a cylindrical one.

  Although not shown in the drawings, a metal mesh or a porous metal plate may be disposed on the inner bottom of the reactor 10 as a strainer for preventing the particulate heat storage material 15 from being discharged.

  Furthermore, in each of the above embodiments, the case where the reactor 10, 210, 310 has a cylindrical shape is shown, but it is an elliptical cylindrical shape, a rounded cylindrical shape, one or a plurality of flat cylindrical shapes, etc. other than a cylindrical shape. In the case of an elliptic cylindrical shape or a flat cylindrical shape, the partition structure portion may be oriented in a direction orthogonal to or intersecting with the long axis direction of the cross section.

  In each of the above embodiments, the heat storage unit is configured such that the reactors 10, 210, and 310 are disposed inside the exhaust pipe 20 (the enlarged diameter portion 22), and the outer surface of the reactor is a heat exchange surface. Although the case where it comprises is shown, this invention is not limited to this, a reactor is provided in the perimeter of exhaust pipe 20, and a thermal storage unit is constituted so that the outer surface of an exhaust pipe serves as a heat exchange surface. You can also

  Also in this embodiment, the exhaust pipe may be an elliptic cylinder, a rounded cylinder, one or a plurality of flat cylinders, etc. other than a cylindrical one, and the reactor at least partially surrounds the exhaust pipes of various shapes. The heat transfer member partition structure may be oriented in a direction orthogonal or intersecting with the long axis direction of the cross section.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Based on the technical idea of this invention, various deformation | transformation and change are possible further.

  For example, in the above embodiment, the present invention is described as being applied to the exhaust system / cooling system of an internal combustion engine vehicle, but the present invention is not limited to this. It is added that it can be implemented to various vehicles that can be expected to generate heat and to be used for warm-up, etc., and also to power machines other than vehicles.

DESCRIPTION OF SYMBOLS 1 internal combustion engine 1a combustion chamber 1b cooling jacket 2 radiator 3 thermostat 4 reservoir tank 5 heater core 10, 210, 310 reactor (heat storage unit)
10a outer surface 10b inner surface 10c inner space 11 switching valve (three-way valve)
12 Discharge valve 13 Purge valve 14, 214, 314 Heat transfer member 14a, 214a, 314a Partition structure 14c, 214c, 314c Central part 14p, 214p, 314p Air gap 15 Heat storage material 20 Exhaust pipe 21 Catalyst part 22 Outer cylinder part G Exhaust Gas (primary medium)
L Coolant (secondary medium)
L1, L2, L5, L10 Coolant circulation path L3 Bypass path L13 Purge path P1 Pump P2 Auxiliary pump

Claims (6)

A reactor having an outer surface in contact with a primary medium serving as a heat source, an inner surface in contact with a secondary medium on the back side of the outer surface, and an inner space defined by the inner surface;
A particulate heat storage material which is contained in the internal space of the reactor, generates heat by the adsorption reaction of the secondary medium, and stores heat by the desorption reaction of the secondary medium;
Means for introducing the secondary medium into the interior space to carry out the adsorption reaction;
Means for discharging the secondary medium separated by the desorption reaction from the internal space;
And means for sealing the internal space.
It further comprises a heat transfer member extending from the inner surface to the inner space,
The heat transfer member includes a partition structure having a space through which the secondary medium can flow and the particulate heat storage material can not pass, and the plurality of particulate heat storage materials are partitioned at least partially by the partition structure A heat storage system characterized in that it is housed in the area of   The heat storage system according to claim 1, wherein the reactor has a cylindrical shape, and the partition structure portion of the heat transfer member is radially arranged.   The heat storage system according to claim 1 or 2, wherein the heat transfer member has a configuration selected from the group consisting of metal mesh, metal wire, metal band, and porous metal plate.   The secondary medium is a mixed medium of a first medium and a second medium, and the first medium has a boiling point lower than that of the second medium, and the first medium has a lower boiling point than the second medium. The heat storage system according to any one of claims 1 to 3, wherein the heat storage system according to any one of claims 1 to 3, which has a high adsorption capacity to the granular heat storage material and has a larger heat of adsorption than the second medium.   The heat storage system according to claim 4, wherein the particulate heat storage material is a zeolite, the first medium is water, and the second medium is ethylene glycol. It is a thermal storage system of the vehicle provided with the thermal storage system as described in any one of Claims 1-5, Comprising:
The primary medium is an exhaust gas discharged from a power unit of the vehicle,
The reactor is disposed such that the outer surface faces the exhaust gas discharge path,
The secondary medium is a coolant that flows through a coolant circulation path of the power unit,
The means for introducing the secondary medium into the inner space includes a second coolant circulation path connected in parallel to the coolant circulation path, and a switching valve to the second coolant circulation path.
The means for discharging the secondary medium from the internal space includes a purge valve for guiding the vaporized coolant to a reservoir tank of the coolant circulation path for condensation.
The means for sealing the internal space includes the switching valve disposed on the introduction side of the internal space, the purge valve, and a discharge valve disposed on the discharge side of the internal space,
The switching valve, the purge valve, and control means for controlling the discharge valve, the control means comprising
At the time of cold start of the power unit, the purge valve is closed, the switching valve and the discharge valve are opened to circulate the coolant through the internal space of the reactor, and the heat is generated by the adsorption reaction of the granular heat storage material. A warm-up promoting step of heating the liquid;
After startup of the power unit, the switching valve and the discharge valve are closed, the purge valve is opened, the granular heat storage material is heated by the heat of the exhaust gas of the power unit, and the cooling liquid is vaporized to form the granular heat storage material. A heat storage step of storing heat by desorption reaction,
After stopping the power unit, closing the purge valve to seal the internal space to prevent moisture absorption of the particulate heat storage material;
A heat storage system for a vehicle, characterized in that it can be selectively implemented.

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