U.S. patent application number 15/117909 was filed with the patent office on 2016-12-22 for chemical heat storage device.
This patent application is currently assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI. The applicant listed for this patent is KABUSHIKI KAISHA TOYOTA JIDOSHOKKI. Invention is credited to Satoshi HARIU, Hiroyasu KAWAUCHI, Kenji MORI, Takanori MURASAKI, Yukihiro NOGUCHI.
Application Number | 20160370121 15/117909 |
Document ID | / |
Family ID | 54071545 |
Filed Date | 2016-12-22 |
United States Patent
Application |
20160370121 |
Kind Code |
A1 |
NOGUCHI; Yukihiro ; et
al. |
December 22, 2016 |
CHEMICAL HEAT STORAGE DEVICE
Abstract
A chemical thermal storage device includes a reactor and an
adsorber connected to the reactor via a pipe. The reactor has a
stack structure body having a plurality of plate-shaped heat
generation parts and a plurality of heat exchange parts alternately
stacked. The heat generation part has a thermal storage material
that generates heat upon chemical reaction with NH.sub.3 and
desorbs NH.sub.3 upon reception of waste heat, and a metal casing
that contains the thermal storage material. The heat exchange part
is a passage of exhaust gas and is constituted of a metal fin. The
metal casings of the heat generation parts and the heat exchange
parts are joined to each other by brazing, welding or the like.
Inventors: |
NOGUCHI; Yukihiro; (Aichi,
JP) ; KAWAUCHI; Hiroyasu; (Aichi, JP) ; MORI;
Kenji; (Aichi, JP) ; HARIU; Satoshi; (Aichi,
JP) ; MURASAKI; Takanori; (Aichi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
Kariya-shi |
|
JP |
|
|
Assignee: |
KABUSHIKI KAISHA TOYOTA
JIDOSHOKKI
Aichi
JP
|
Family ID: |
54071545 |
Appl. No.: |
15/117909 |
Filed: |
February 20, 2015 |
PCT Filed: |
February 20, 2015 |
PCT NO: |
PCT/JP2015/054852 |
371 Date: |
August 10, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F01N 3/2006 20130101;
F28F 19/06 20130101; F28D 20/003 20130101; F01N 3/2066 20130101;
F01N 3/021 20130101; Y02E 60/14 20130101; Y02E 60/142 20130101;
F28D 21/0003 20130101; F28D 2020/0078 20130101; F01N 2570/14
20130101; F01N 3/103 20130101; F01N 2570/18 20130101; F01N 2610/02
20130101 |
International
Class: |
F28D 20/00 20060101
F28D020/00; F01N 3/10 20060101 F01N003/10; F01N 3/021 20060101
F01N003/021; F01N 3/20 20060101 F01N003/20; F28D 21/00 20060101
F28D021/00; F28F 19/06 20060101 F28F019/06 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 10, 2014 |
JP |
2014-046337 |
Claims
1. A chemical thermal storage device comprising: a reservoir that
stores a reaction medium; and a reactor that is connected to the
reservoir and heats a fluid, wherein the reactor includes a heat
generation part that generates heat, and a heat exchange part made
of a metal that forms a flow channel through which the fluid can
flow and that transfers the heat generated in the heat generation
part to the fluid, the reactor having a stack structure body having
the heat generation part and the heat exchange part alternately
stacked, the heat generation part has a thermal storage material
that generates the heat upon chemical reaction with the reaction
medium and desorbs the reaction medium upon reception of the heat
from the fluid, and a metal casing that contains the thermal
storage material, and the metal casing and the heat exchange part
are joined to each other.
2. The chemical thermal storage device according to claim 1,
wherein the heat exchange part is disposed on an outermost side of
the stack structure body in a stacking direction.
3. The chemical thermal storage device according to claim 1,
wherein the heat exchange part has a first metal layer, and second
metal layers provided in such a way as to sandwich the first metal
layer and having corrosion resistance to the fluid, and heat
conductivity of the first metal layer is higher than heat
conductivity of the second metal layer.
Description
TECHNICAL FIELD
[0001] The present invention relates to a chemical thermal storage
device used, for example, for heating exhaust gas or the like
discharged from an engine.
BACKGROUND ART
[0002] As a conventional chemical thermal storage device, there is
known one disclosed, for example, in Patent Literature 1. A
chemical thermal storage device disclosed in Patent Literature 1
includes a reactor that is disposed around a catalyst ceramic part
purifying exhaust gas discharged from an engine and contains a
thermal storage substance (thermal storage material) included in a
housing part, and a water introduction tube part that supplies
water as a reaction medium for causing the thermal storage
substance to generate heat. Upon exothermic reaction between the
water and the thermal storage substance, heat is generated from the
reactor and the catalyst ceramic part is heated through heat
conduction.
CITATION LIST
Patent Literature
[0003] Patent Literature 1: Japanese Unexamined Patent Publication
Application No. S59-208118
SUMMARY OF INVENTION
Technical Problem
[0004] However, there exist the following problems in the
aforementioned conventional art. Namely, when the housing part of
the reactor is formed of a metal material similarly to the exhaust
pipe, the housing part and the catalyst ceramic part which are
different materials cannot be welded or brazed to each other.
Hence, the housing part and the catalyst ceramic part are only
brought into physical contact with each other. In this case, since
heat resistance at the interface between the housing part and the
catalyst ceramic part is large, the heat generated in the thermal
storage material is hardly transferred to the catalyst ceramic
part. Moreover, in order to secure purification performance of the
catalyst ceramic part, dimensions thereof equal to or exceeding
predetermined ones for the catalyst ceramic part are needed. In
this case, since a distance from the thermal storage material to
the center part of the catalyst ceramic part must be long, heat
resistance between the thermal storage material and the center part
of the catalyst ceramic part is large, which causes the heat
generated in the thermal storage material not to be sufficiently
transferred to the center part of the catalyst ceramic part.
Namely, with the conventional configuration, the heat generated in
the thermal storage material has not been able to be sufficiently
transferred to the catalyst ceramic part which is a heating
object.
[0005] Moreover, also when heating the exhaust gas flowing in the
exhaust pipe, by disposing, in the exhaust pipe, a ceramics-made
heat exchanger through which the exhaust gas can flow, and
disposing, around the heat exchanger, the reactor containing the
thermal storage material, similarly to the above, the distance from
the thermal storage material to the center part of the heat
exchanger is long, and the heat resistance between the thermal
storage material and the center part of the heat exchanger is
large. Hence, it has been difficult to sufficiently raise the
temperature of the exhaust gas.
[0006] An object of the present invention is to provide a chemical
thermal storage device capable of efficiently transferring heat
generated in a thermal storage material to a fluid.
Solution to Problem
[0007] There is provided a chemical thermal storage device of the
present invention, comprising: a reservoir that stores a reaction
medium; and a reactor that is connected to the reservoir and heats
a fluid, wherein the reactor includes a heat generation part that
generates heat, and a heat exchange part made of a metal that forms
a flow channel through which the fluid can flow and that exchanges
the heat generated in the heat generation part to the fluid, the
reactor having a stack structure body having the heat generation
part and the heat exchange part alternately stacked, the heat
generation part has a thermal storage material that generates the
heat upon chemical reaction with the reaction medium and desorbs
the reaction medium upon reception of the heat from the fluid, and
a metal casing that contains the thermal storage material, and the
metal casing and the heat exchange part are joined to each
other.
[0008] In such a chemical thermal storage device of the present
invention, when the reaction medium is supplied from the storage to
the reactor, the thermal storage material of the heat generation
part and the reaction medium undergo chemical reaction to generate
heat from the thermal storage material, the heat is transferred to
the heat exchange part to result in heat exchange with the fluid,
and thereby, the fluid is heated. In this stage, since the heat
generation part and the heat exchange part are alternately stacked
and the metal casing of the heat generation part and the metal-made
heat exchange part are joined to each other, and thereby, heat
resistance at the interfaces between the heat generation part and
the heat exchange part is small, the heat generated in the thermal
storage material is easily transferred to the heat exchange part.
Moreover, the heat generation part and the heat exchange part are
stacked, and thereby, the heat exchange part can be formed into
multiple stages while being thin. In this case, since a distance
from the thermal storage material to the center part of the heat
exchange part in the stacking direction is short, heat resistance
between the thermal storage material and the center part of the
heat exchange part in the stacking direction is small. Due to this,
the heat generated in the thermal storage material is sufficiently
transferred to the center part of the heat exchange part in the
stacking direction. According to the above, the heat generated in
the thermal storage materials can be efficiently transferred to the
fluid.
[0009] The heat exchange part may be disposed on the outermost side
of the stack structure body in the stacking direction. When the
heat generation part is disposed on the outermost side of the stack
structure body in the stacking direction, a part of the heat
generated from the heat generation part is sometimes released to
the outside of the reactor as waste heat. Therefore, the heat
exchange part is disposed on the outermost side of the stack
structure body in the stacking direction, and thereby, the heat
generated from the heat generation part can be suppressed from
being released to the outside of the reactor, and the heat
generated in the heat generation part can be exchanged and
effectively used between these and the fluid. Moreover, since the
heat exchange part is disposed on the outermost side of the stack
structure body in the stacking direction, and thereby, the heat
exchange part protects the heat generation part from an impact
object, damage or the like of the heat generation part can be
prevented.
[0010] Moreover, the heat exchange part may have the first metal
layer, and the second metal layers provided in such a way as to
sandwich the first metal layer and having corrosion resistance to
the fluid, and the heat conductivity of the first metal layer may
be higher than the heat conductivity of the second metal layer. In
this way, the first metal layer higher in heat conductivity than
the second metal layer is used, and thereby, the heat generated in
the thermal storage materials can be further efficiently
transferred to the entirety of the heat exchange part. Moreover,
the second metal layers having corrosion resistance to the fluid
sandwich the first metal layer, and thereby, corrosion of the first
metal layer due to the fluid can be prevented.
Advantageous Effects of Invention
[0011] According to the present invention, heat generated in a
thermal storage material can be efficiently transferred to a fluid.
In this way, the temperature of the fluid can be sufficiently and
smoothly raised.
BRIEF DESCRIPTION OF DRAWINGS
[0012] FIG. 1 is a schematic configuration diagram illustrating an
exhaust purification system including an embodiment of a chemical
thermal storage device according to the present invention.
[0013] FIG. 2 is a perspective view of a reactor illustrated in
FIG. 1.
[0014] FIG. 3 is a perspective view (partially including a
cross-sectional view) illustrating a modification of a metal fin
constituting a heat exchange part illustrated in FIG. 2.
DESCRIPTION OF EMBODIMENTS
[0015] Hereafter, preferred embodiments of a chemical thermal
storage device according to the present invention are described in
detail with reference to the drawings.
[0016] FIG. 1 is a schematic configuration diagram illustrating an
exhaust purification system including an embodiment of the chemical
thermal storage device according to the present invention. In the
figure, an exhaust purification system 1 is provided in an exhaust
system of a diesel engine 2 of a vehicle (hereinafter referred to
simply as engine 2), and is a system that purifies harmful
substances (environmental pollutants) contained in exhaust gas
discharged from the engine 2.
[0017] The exhaust purification system 1 includes an oxidation
catalyst (DOC: Diesel Oxidation Catalyst) 4, a diesel exhaust
particulate removal filter (DPF: Diesel Particulate Filter) 5, a
selective reduction catalyst (SCR: Selective Catalytic Reduction) 6
and an oxidation catalyst (ASC: Ammonia Slip Catalyst) 7, which are
arranged in the middle of an exhaust passage 3 connected to the
engine 2 sequentially from the upstream side toward the downstream
side.
[0018] The oxidation catalyst 4 is a catalyst that oxidizes HC
(hydrocarbon), CO and the like contained in the exhaust gas and
purifies the exhaust gas. The DPF 5 is a filter that collects and
removes particulate matter (PM: Particulate Matter) contained in
the exhaust gas. The SCR 6 is a catalyst that reduces NO.sub.x
contained in the exhaust gas with urea or ammonia (NH.sub.3), and
purifies the exhaust gas. The oxidation catalyst 7 is a catalyst
that oxidizes NH.sub.3 that has passed through the SCR 6 and flowed
to the downstream side of the SCR 6.
[0019] Now, in the oxidation catalyst 4, there exists a temperature
region (active temperature) in which it exhibits performance of
cleaning up the environmental pollutants. Accordingly, when the
temperature of the exhaust gas is low as immediate after the start
of the engine 2, in order to make the temperature of the oxidation
catalyst 4 the active temperature, it is needed to heat the
oxidation catalyst 4. Notably, the active temperature of the
oxidation catalyst 4 is, for example, approximately 170.degree. C.
to 270.degree. C. In order to heat the oxidation catalyst 4, it is
effective to heat the exhaust gas supplied to the oxidation
catalyst 4.
[0020] Therefore, the exhaust purification system 1 includes a
chemical thermal storage device 10 of the present embodiment. The
chemical thermal storage device 10 is a device that heats the
exhaust gas without energy by normally storing heat of the exhaust
gas (waste heat) and using the waste heat when needed.
[0021] The chemical thermal storage device 10 includes a reactor 11
disposed between the engine 2 and the oxidation catalyst 4 on the
exhaust passage 3, an adsorber 13 connected to the reactor 11 via a
pipe 12, and a solenoid valve 14 provided on the pipe 12. The
reactor 11 is contained in an exhaust pipe 15 forming a part of the
exhaust passage 3. The exhaust pipe 15 is formed, for example, of
stainless steel (SUS).
[0022] As illustrated also in FIG. 2, the reactor 11 has a stack
structure body 18 having a plurality of plate-shaped heat
generation parts 16 and a plurality of fin-shaped heat exchange
parts 17 alternately stacked. The stack structure body 18 is
configured in such a way that the heat exchange parts 17 are
positioned in the upper end part and the lower end part (outermost
parts in the stacking direction).
[0023] The heat generation part 16 has a thermal storage material
19 (see FIG. 1) that generates heat upon chemical reaction with
NH.sub.3 which is a gaseous reaction medium and that desorbs
NH.sub.3 upon reception of the waste heat, and a metal casing 20
that contains the thermal storage material 19. The metal casing 20
is formed of a metal material having corrosion resistance to
NH.sub.3, for example, stainless steel.
[0024] As the thermal storage material 19, a material having a
constitution of MX.sub.a which is a halide is used. Herein, M is an
alkali earth metal such as Mg, Ca and Sr or a transition metal such
as Cr, Mn, Fe, Co, Ni, Cu and Zn. X is Cl, Br, I or the like. a is
2 to 3. The thermal storage material 19 is press-molded and sealed
in the metal casing 20.
[0025] In this stage, an additive for improving heat conductivity
may be mixed into the thermal storage material 19. As the additive,
carbon fibers, carbon beads, SiC beads, polymer beads, polymer
fibers or the like may be used or metal such as Cu, Ag, Ni, Ci--Cr,
Al, Fe and stainless steel may also be used.
[0026] The heat exchange part 17 forms flow channels through which
the exhaust gas can flow. The heat exchange part 17 is constituted
of a metal fin, for example, formed into a zigzag shape in its
cross section or a wave-like shape in its cross section. In this
stage, in order to increase a contact area of the metal fin with
the exhaust gas, a part of the metal fin may be formed to have an
offset or the metal fin may also be formed to meander. The heat
exchange part 17 is made of metal and is formed of a metal material
having corrosion resistance to nitric acid, sulfuric acid and the
like contained in the exhaust gas, herein, of stainless steel the
same as that of the metal casing 20.
[0027] The metal casing 20 of the heat generation part 16 and the
heat exchange part 17 are joined to each other by means of joining
metals to each other, such as brazing, welding and the like. In
this way, the heat generation part 16 and the heat exchange part 17
are in close contact with each other to afford an integrated
structure.
[0028] A metal plate 21 is disposed at each of an upper face part
and a lower face part of the stack structure body 18. The metal
plate 21 is formed, for example, of stainless steel. To provide the
metal plates 21 can secure the strength of the stack structure body
18. Moreover, expansion of the thermal storage material 19 can be
suppressed by the metal plates 21. Notably, the metal plates 21 are
not particularly necessarily needed.
[0029] An introduction header 22 for introducing NH.sub.3 into each
heat generation part 16 is fixed onto one lateral side of the stack
structure body 18. One end part of the pipe 12 is attached to the
introduction header 22.
[0030] Returning to FIG. 1, the adsorber 13 contains an adsorption
material 23 capable of retention and desorption of NH.sub.3 through
physical adsorption. As the adsorption material 23, activated
carbon, zeolite or the like is used. The adsorber 13 is a reservoir
that stores NH.sub.3 through the physical adsorption of NH.sub.3 to
the adsorption material 23.
[0031] In the chemical thermal storage device 10 as above, when the
temperature of the exhaust gas from the engine 2 (exhaust
temperature) is low, the solenoid valve 14 opens, and NH.sub.3
desorbed from the adsorption material 23 in the adsorber 13 is
supplied to the reactor 11 through the pipe 12 by a pressure
difference between those in the reactor 11 and the adsorber 13.
Then, NH.sub.3 is introduced into each heat generation part 16
through the introduction header 22. Then, in each heat generation
part 16, when the thermal storage material 19 (for example,
MgBr.sub.2) and NH.sub.3 undergo chemical reaction to result in
chemical adsorption (coordinate bonding), heat is generated from
the thermal storage material 19. In other words, a reaction
(exothermic reaction) from the left side to the right side in the
following reaction formula (A) takes place.
MgBr.sub.2+xNH.sub.3Mg(NH.sub.3).sub.xBr.sub.2+heat (A)
[0032] Then, the heat generated in the thermal storage materials 19
is transferred to the heat exchange parts 17 via the metal casings
20, the heat is transferred to the exhaust gas in the heat exchange
parts 17 (heat exchange between the thermal storage materials 19
(heat generation parts 16) and the exhaust gas takes place), and
thereby, the temperature of the exhaust gas is raised. Then, the
oxidation catalyst 4 is heated to the active temperature suitable
for cleaning up the pollutants with the exhaust gas whose
temperature is raised.
[0033] On the other hand, when the exhaust gas temperature becomes
higher than the heat generation temperature of the thermal storage
materials 19, the waste heat is given to the thermal storage
materials 19 via the heat exchange parts 17 and the metal casings
20, and thereby, NH.sub.3 is separated from the thermal storage
materials 19. In other words, a reaction (regeneration reaction)
from the right side to the left side in the aforementioned reaction
formula (A) takes place. Then, NH.sub.3 desorbed from the thermal
storage materials 19 in the heat generation parts 16 is recovered
into the adsorber 13 through the pipe 12.
[0034] In this way, by using the chemical thermal storage device
10, the temperature of the exhaust gas can be raised at low exhaust
temperature without giving external energy. In this way, the
exhaust purification system 1 high in fuel efficiency and high in
rate of purification can be constructed.
[0035] In this stage, the metal casings 20 of the heat generation
parts 16 and the heat exchange parts 17 are joined (fixed) to each
other by brazing, welding or the like. Due to this, heat resistance
at the interface between the metal casing 20 and the heat exchange
part 17 is small. Accordingly, in the aforementioned exothermic
reaction, the heat generated in the thermal storage materials 19 is
easily transferred to the heat exchange parts 17. Moreover, in the
aforementioned regeneration reaction, the waste heat is easily
transferred from the heat exchange parts 17 to the thermal storage
materials 19.
[0036] Moreover, since the reactor 11 has the stack structure body
18 having the plurality of heat generation parts 16 and the
plurality of heat exchange parts 17 alternately stacked, each heat
exchange part 17 is to be formed to be thin. Due to this, since a
distance between the heat generation part 16 and the center part of
the heat exchange part 17 in the stacking direction becomes short,
the heat resistance between the heat generation part 16 and the
center part of the heat exchange part 17 in the stacking direction
becomes small. Accordingly, in the exothermic reaction, the heat
generated in the thermal storage materials 19 is sufficiently
transferred to the entirety of the heat exchange parts 17.
Moreover, in the regeneration reaction, the waste heat is
effectively transferred from the entirety of the heat exchange
parts 17 to the thermal storage materials 19.
[0037] Therefore, according to the present embodiment, in the
exothermic reaction, since the heat generated in the thermal
storage materials 19 is efficiently transferred to the heat
exchange parts 17, the heat generated in the thermal storage
materials 19 can be efficiently transferred to the exhaust gas via
the heat exchange parts 17. In this way, the temperature of the
exhaust gas can be sufficiently and smoothly raised. Moreover, in
the regeneration reaction, since the waste heat is efficiently
transferred from the heat exchange parts 17 to the thermal storage
materials 19, desorption of NH.sub.3 from the thermal storage
materials 19 is promoted and recovery of NH.sub.3 into the adsorber
13 can be effectively performed.
[0038] Moreover, in the present embodiment, since the heat exchange
parts 17 are disposed at the upper end part and the lower end part
of the stack structure body 18, the heat generated from the heat
generation parts 16 can be suppressed from being released to the
outside via the exhaust pipe 15 to be a waste, and a large part of
the heat generated from the heat generation parts 16 can be
effectively used for heat exchange with the exhaust gas in the heat
exchange parts 17. Furthermore, since the heat exchange parts 17
protect the heat generation parts 16 from an impact object such as
a stone, impact of the impact object is absorbed by the heat
exchange parts 17, as a result, inconvenience such as damage of the
heat generation parts 16 can be prevented.
[0039] Notably, the present invention is not limited to the
aforementioned embodiment. For example, while in the aforementioned
embodiment, the heat exchange part 17 is configured to be the metal
fin formed of a single metal material (herein, stainless steel),
the heat exchange part 17 may be configured to be a metal fin
formed of a plurality of kinds of metal materials (cladding
material). FIG. 3 illustrates a modification of the metal fin
constituting the heat exchange part 17.
[0040] In FIG. 3, the heat exchange part 17 is constituted of a
high heat conductive metal foil (first metal layer) 31 and
corrosion resistant metal foils (second metal layers) 32 which are
respectively joined onto both surfaces of the high heat conductive
metal foil 31. In other words, the heat exchange part 17 has a
structure to sandwich the high heat conductive metal foil 31 with a
pair of corrosion resistant metal foils 32.
[0041] The heat conductivity of the high heat conductive metal foil
31 is higher than the heat conductivity of the corrosion resistant
metal foil 32. As to corrosion resistance to the exhaust gas, the
corrosion resistant metal foil 32 is higher than the high heat
conductive metal foil 31. For the material of the high heat
conductive metal foil 31, copper, silver, brass, aluminum alloy,
magnesium alloy and the like are used. For the material of the
corrosion resistant metal foil 32, stainless steel and the like are
used. The heat exchange part. 17 is produced by rolling and joining
the high heat conductive metal foil 31 and the corrosion resistant
metal foils 32 to each other with milling rollers.
[0042] In this way, by forming the heat exchange part 17 of a
cladding material consisting of the high heat conductive metal foil
31 and the corrosion resistant metal foils 32, the heat generated
in the thermal storage materials 19 can be further sufficiently
transferred to the entirety of the heat exchange parts 17, and the
heat exchange parts 17 can be prevented from being corroded by
nitric acid, sulfuric acid and the like contained in the exhaust
gas.
[0043] Notably, such a cladding material consisting of the high
heat conductive metal foil 31 and the corrosion resistant metal
foils 32 may be used for the metal material of the metal casing 20
of the heat generation part 16.
[0044] Moreover, while in the aforementioned embodiments, the heat
exchange parts 17 are disposed on the outermost side of the stack
structure body 18 in the stacking direction, not specially limited
to this, the heat generation part 16 may be disposed on the
outermost side of the stack structure body 18 in the stacking
direction. Moreover, the numbers of stages of the heat generation
parts 16 and the heat exchange parts 17 in the stack structure body
18 can be properly determined depending on products to be used and
the like.
[0045] Furthermore, while in the aforementioned embodiments,
NH.sub.3 is used as the reaction medium which undergoes chemical
reaction with the thermal storage materials 19 in the heat
generation parts 16, the reaction medium is not specially limited
to NH.sub.3 but CO.sub.2, alcohol, water or the like may be
used.
[0046] Moreover, while one chemical thermal storage device 10 of
the aforementioned embodiments is disposed in the upstream stage of
the oxidation catalyst (DOC) 4, not specially limited to this, one
chemical thermal storage device 10 may be disposed in the upstream
stage of any of the DPF 5, the SCR 6 and the oxidation catalyst
(ASC) 7, or a plurality of chemical thermal storage devices 10 may
also be disposed in the upstream stages of any of the DOC 4, the
DPF 5, the SCR 6 and the ASC 7.
[0047] Moreover, while the chemical thermal storage device 10 of
the aforementioned embodiments heats the exhaust gas discharged
from the diesel engine 2, a chemical thermal storage device of the
present invention is not specially limited to this but can also be
applied to one which heats exhaust gas discharged from a gasoline
engine. Moreover, a chemical thermal storage device of the present
invention can also be applied to one which heats a gaseous or
liquid fluid other than exhaust gas, for example, oil, a heat
medium or the like.
REFERENCE SIGNS LIST
[0048] 10 . . . Chemical thermal storage device, 11 . . . Reactor,
13 . . . Adsorber (reservoir), 16 . . . Heat generation part, 17 .
. . Heat exchange part, 18 . . . Stack structure body; 19 . . .
Thermal storage material, 20 . . . Metal casing, 31 . . . High heat
conductive metal foil (first metal layer), 32 . . . Corrosion
resistant metal foil (second metal layer).
* * * * *