U.S. patent application number 15/325494 was filed with the patent office on 2017-06-08 for heat storage device.
The applicant listed for this patent is LINDE AKTIENGESELLSCHAFT. Invention is credited to Heinz Posselt, Manfred Schonberger.
Application Number | 20170160020 15/325494 |
Document ID | / |
Family ID | 53682633 |
Filed Date | 2017-06-08 |
United States Patent
Application |
20170160020 |
Kind Code |
A1 |
Posselt; Heinz ; et
al. |
June 8, 2017 |
HEAT STORAGE DEVICE
Abstract
A heat storage device for transferring heat indirectly between a
fluid and a heat storing medium, and for storing transferred heat,
includes a container that surrounds an interior of the container,
the heat storing medium being located in this interior. A plurality
of vertical tubes are arranged in the interior of the container,
each of these tubes being fluidically connected to a vertical
header tube by means of a lower end section. Each of the tubes has
a plurality of heat transfer fins that contact the heat storing
medium.
Inventors: |
Posselt; Heinz; (Bad
Aibling, DE) ; Schonberger; Manfred; (Tacherting,
DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LINDE AKTIENGESELLSCHAFT |
Munchen |
|
DE |
|
|
Family ID: |
53682633 |
Appl. No.: |
15/325494 |
Filed: |
July 16, 2015 |
PCT Filed: |
July 16, 2015 |
PCT NO: |
PCT/EP2015/001467 |
371 Date: |
January 11, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
Y02E 60/14 20130101;
Y02E 60/145 20130101; F28F 1/003 20130101; F28D 20/021 20130101;
F28F 2270/00 20130101; F28D 2020/0069 20130101; F28D 2020/0078
20130101; F28F 1/14 20130101 |
International
Class: |
F28D 20/02 20060101
F28D020/02; F28F 1/00 20060101 F28F001/00; F28F 1/14 20060101
F28F001/14 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 17, 2014 |
DE |
10 2014 010 636.5 |
Claims
1. A heat storage device for indirect heat transfer between a fluid
and a heat storage medium, and also for storing transferred heat,
having: a container that surrounds an interior space of the
container, wherein the heat storage medium is arranged in the
interior space, characterized in that a multiplicity of vertical
tubes is arranged in the interior space of the container, wherein
the tubes are each surrounded by the heat storage medium, wherein
the tubes are each flow-connected via a lower end section to a
vertical header tube, wherein the tubes each have a multiplicity of
heat transfer fins, wherein the heat transfer fins contact the heat
storage medium.
2. The heat storage device as claimed in claim 1, characterized in
that the heat storage medium is a phase change material.
3. The heat storage device as claimed in claim 1, characterized in
that the fluid can be conducted into the tubes in two flow
directions.
4. The heat storage device as claimed in claim 1, characterized in
that the tubes are each flow-connected at an upper end to a
distributor in such a manner that the fluid is feedable into the
respective tube via the distributor.
5. The heat storage device as claimed in claim 4, characterized in
that the distributor comprises a tube sheet in which the tubes are
anchored.
6. The heat storage device as claimed in claim 4, characterized in
that the distributor comprises a further tube sheet in which the
header tube is anchored.
7. The heat storage device as claimed in claim 1, characterized in
that the header tube is arranged centrally in the container,
wherein the tubes are arranged distributed around the header
tube.
8. The heat storage device as claimed in claim 1, characterized in
that the header tube has a heat insulation, wherein, in particular,
the header tube is constructed as a double tube that comprises an
inner tube and also an outer tube surrounding the inner tube,
wherein the heat insulation is arranged in a ring gap between the
inner tube and the outer tube of the header tube.
9. The heat storage device as claimed in claim 1, characterized in
that the flow connection between the tubes and the header tube
comprises a header, wherein the tubes each open out via a lower
opening of the respective tube into the header, and wherein the
header tube opens out via a lower opening of the header tube into
the header.
10. The heat storage device as claimed in claim 9, characterized in
that the header has a convex shell that delimits an interior space
of the header, wherein, in particular, at least one upper region of
the shell of the header is constructed so as to be spherical
segment-shaped.
11. The heat storage device as claimed in claim 1, characterized in
that the interior space, for preventing cavities in the event of a
solidification of the heat storage medium of the container,
comprises a region surrounding the header tube, in which region
none of the tubes is arranged.
Description
[0001] The invention relates to a heat storage device according to
claim 1.
[0002] Such heat storage devices serve for the indirect heat
transfer between a fluid and a heat storage medium, and also for
storing the heat transferred from the fluid to the heat storage
medium.
[0003] The heat storage medium can be, in particular, a phase
change material (PCM), using which the heat of a fluid, which can
be any desired process medium or a process stream, can be stored or
liberated at a virtually constant temperature using the latent heat
(e.g. in the liquid-solid phase transition). On account of the jump
of the specific volume between the solid and liquid phase of the
heat storage medium, the phase transition must take place
continuously with respect to space, in order to avoid local
pressure differences. These pressure differences would otherwise
lead to a mechanical overloading of the heat-transfer system
between the fluid and the heat storage medium or phase change
material.
[0004] It is known to date (cf. e.g. KR20000033239) that tubes
through which the fluid or process medium flows and which are
provided with external heat transfer fins are arranged horizontally
in the container accommodating the heat storage medium. In this
case, however, a uniform melting or freezing of the heat storage
medium is not ensured.
[0005] In addition, concepts are known (cf. e.g. CN102777874), in
which the tubes are conducted vertically with their external heat
transfer fins between two tube sheets. The lower tube sheet in this
case must, however, withstand the full weight of the heat storage
medium. In the case of large volumes of heat storage medium,
therefore, tube sheets having a diameter of several meters would be
necessary.
[0006] Proceeding therefrom, the present invention addresses the
problem of improving a heat storage device of the type mentioned at
the outset to the extent that the abovementioned disadvantages are
at least in part reduced.
[0007] This problem is solved by a heat storage device having the
features of claim 1. Advantageous embodiments of the invention are
specified in the corresponding subclaims and/or are described
hereinafter,
[0008] According to claim 1, it is provided according to the
invention that, in the interior space of the container, a
multiplicity of tubes is arranged each of which extends along a
longitudinal axis, wherein the tubes and/or the longitudinal
axes--based on a heat storage device arranged according to
specifications--proceed along the vertical, wherein each of the
tubes, at a lower end section of the respective tube, is
flow-connected to a (in particular single) likewise vertically
proceeding header tube (i.e. the header tube extends along a
longitudinal axis which proceeds along the vertical, relative to a
heat storage device arranged according to specifications). The flow
connections can be formed, e.g., in each case by a tube conduit
section and/or flow path proceeding along the horizontal, which
section and/or path connect the respective tube to a lower section
of the header tube or via a header (see below). In addition, the
tubes according to the invention have a multiplicity of heat
transfer fins that contact the heat storage medium in order to
ensure heat transfer that is as good as possible between the fluid
and the heat storage medium.
[0009] The heat storage device is preferably constructed in order
to conduct the fluid (e.g. steam) from top to bottom in the
respective tube during storage of heat, in such a manner that heat
is transferable from the fluid flowing in the respective tube to
the heat storage medium, wherein the heat storage device further
preferably is constructed in order to conduct the fluid from bottom
back to top in the header tube, wherein the fluid is withdrawable
in particular via the header tube. For delivery of heat, the heat
storage device is preferably constructed in order to conduct the
fluid (e.g. water) via the header tube from top to bottom and via
the tubes from bottom back to top, in such a manner that heat is
transferable from the heat storage medium to the fluid.
[0010] Preferably, the heat transfer fins in this case can each
project in a radial direction of the respective tube away from a
shell of the respective tube, or in another manner be fixed on the
respective tube. The heat transfer fins can also project in a
radial direction from an additional carrier which is fixed on a
shell of the respective tube. The carrier can itself be designed so
as to be tubular or dish-shaped. In particular, the respective
carrier can have two dishes which are opposite one another and
surround the respective shell on which they are fixed. Then, the
heat transfer fins project e.g. in a radial direction, from the
carrier or from the dishes. The heat transfer fins can be molded in
a one-piece manner onto the carrier or the dishes, or be connected
thereto in another way (e.g. weld connections)
[0011] On account of the increased effective surface area of the
tubes due to the fins, improved heat transfer occurs between the
fluid and the heat storage medium.
[0012] With the heat storage device according to the invention,
firstly heat of a fluid and/or a process medium can be transferred
thereby to the heat storage medium and stored therein and/or,
secondly, heat stored in the heat storage medium can be transferred
to a fluid and/or process medium.
[0013] Owing to the vertically arranged tubes, a spatially
homogeneous melting and/or freezing of the heat storage medium
around the tubes is possible, wherein, in particular, additionally
owing to the conducting of the fluid through the tubes (with
recirculation and/or feeding through a header tube), a lower tube
sheet is dispensable, and so the weight of the heat storage medium
need not be deflected via a lower tube sheet, but, e.g. via a
correspondingly designed container bottom. Preferably, therefore,
the tubes and also optionally the header tube and the flow
connection between the tubes and the header tube are held from the
top, in particular via a distributor or a tube sheet and/or other
internals.
[0014] As already mentioned at the outset, the heat storage medium
is preferably a phase change material, that is to say a material,
the latent heat of melting, heat of solution or heat of absorption
of which is greater than the heat which it can store owing to its
specific heat capacity (without the phase conversion). The heat
storage device is correspondingly also termed a latent heat storage
device. The heat storage medium can be, e.g., a nitrate salt,
and/or the heat storage medium can comprise a nitrate salt such as,
e.g., NaNO.sub.3 or KNO.sub.3. The heat storage medium can also
comprise a mixture of nitrate salts, in particular a mixture of
NaNO.sub.3 and KNO.sub.3.
[0015] For distribution of the fluid between the tubes, preferably
a distributor is provided that is flow connected to the tubes at an
upper end of the tubes in such a manner that the fluid is feedable
into the respective tube via the distributor.
[0016] According to a preferred embodiment of the invention, it is
provided that the distributor comprises at least one (in particular
annular) tube conduit having respectively a first chamber and a
second chamber separate therefrom.
[0017] Of course, a plurality of said annular tube conduits can
also be provided that then preferably are arranged concentrically
with one another in a plane, According to an alternative variant of
the heat storage device according to the invention, the distributor
can also comprise a tube sheet in which the tubes are respectively
anchored by their upper end. The distributor can, in addition,
comprise a further tube sheet in which the header tube is
anchored.
[0018] According to an embodiment with header tube for taking off
and optionally feeding the fluid, it is preferably provided that
the tubes are each anchored with an upper end in a tube sheet of
the distributor, in such a manner that the fluid is feedable (or
removable) via the tube sheet into (out of) the respective tube,
and flows downwards or upwards, respectively, therein. The header
tube in this case is preferably passed through the tube sheet by an
upper end section, or a corresponding flow path is conducted
through the tube sheet.
[0019] In addition, the tube sheet, with a preferably hood-shaped
cover of the container, can delimit a chamber of the distributor
into which the fluid is introducible via a port or from which the
fluid is removable via the port. The fluid introduced into the
chamber can then pass into the tubes via the tube sheet or can be
removed from the tubes via said chamber.
[0020] The header tube is preferably arranged centrally in the
container along the vertical, wherein the tubes are preferably
arranged further outside radially, and preferably arranged
distributed around the header tube.
[0021] According to a further embodiment of the invention, it is
provided that the flow connection between the tubes and the header
tube comprises a header, or is produced via a header, wherein the
tubes each open out via a lower end-side opening of the respective
tube into the header, and wherein the header tube opens out via a
lower end-side opening of the header tube into the header. The
header tube, the tubes and the header can be carried by the tube
sheet.
[0022] According to an embodiment, it is provided in this case that
the header has a convex shell that delimits an interior space of
the header for collecting the fluid, wherein, in particular, at
least one upper region of the shell of the header is constructed so
as to be spherical segment-shaped. Preferably, the tubes open out
into said upper region of the header, wherein, preferably, the
header tube opens out into the header at a highest point of the
header or of the shell of the header. Preferably, the shell of the
header is designed so as to be cylindrically symmetrical, wherein
the cylinder axis coincides with the longitudinal axis of the
header tube that opens out into the header from the top.
[0023] According to a further preferred embodiment, it is provided
that the interior space of the container, for preventing cavities
in the event of a solidification of the heat storage medium,
comprises a region surrounding the header tube, or a region in
which the header tube is arranged, wherein none of the tubes is
arranged in the region. Said region extends preferably along the
header tube. Via this region (which is also termed feeder), in
which none or a reduced heat transfer takes place, on
solidification of the heat storage medium, fluid heat storage
medium is subsequently delivered, in particular downwards, and also
outwards, towards the tubes. The region preferably has a diameter
that is at least twice as large as the outer diameter of the header
tube. Preferably, the diameter of the region is additionally
selected in such a manner that here the heat storage medium becomes
solid last. If this is the case, the diameter optionally can also
be smaller.
[0024] In addition, the header tube can also be constructed without
additional insulation. An insulation can then be achieved by the
insulating action of the (solidified) heat storage medium and/or
salt. The central region then preferably has a correspondingly
greater diameter, via which the desired insulation is provided.
[0025] To provide the required amount of fluid heat storage medium,
the interior space of the container, at the upper end of the tubes,
has a region or a partial volume which borders, e.g. on the tube
sheet, and in which said amount of fluid heat storage medium is
providable. In this region or partial volume of the interior space,
the tubes preferably do not have heat transfer fins.
[0026] In addition, it can likewise be provided that the tubes each
have a lower section via which the respective tube opens out into
the header, wherein, likewise, no heat transfer fins are provided
on said sections.
[0027] In all embodiments of the invention, it can be provided that
the container is constructed as an inner container that is arranged
in an interior space of an outer container in such a manner that an
intermediate space is present between the shell of the inner
container and a shell of the outer container.
[0028] The intermediate space or parts of the intermediate space
can be evacuated and/or be filled with an insulation material (e.g.
in the form of a bed).
[0029] In addition, the inner container can be suspended via a
suspension bracket on the shell of the outer container.
[0030] In addition, in all embodiments, on a lower region or base
of the shell of the container or inner container, a port can be
provided for charging the interior space of the container or inner
container with heat storage medium and/or for removing heat storage
medium from the interior space of the container or inner container.
The port in this case can have a heating device such that the heat
storage medium can optionally be transferred into the liquid state
of matter.
[0031] Further features and advantages of the present invention
will be explained in the description of exemplary embodiments with
reference to the figures. In the figures:
[0032] FIG. 1 shows a schematic sectional view of an embodiment of
a heat storage device according to the invention;
[0033] FIG. 2 shows a schematic detailed sectional view of an
alternative embodiment of the distributor according to FIG. 1
[0034] FIG. 3A shows a schematic sectional view of a tube of a heat
storage device according to the invention;
[0035] FIG. 3B shows a further schematic sectional view of a tube
of a heat storage device according to the invention;
[0036] FIG. 4 shows a sectional view of a further embodiment of a
heat storage device according to the invention.
[0037] FIG. 1, in combination with FIG. 3A and FIG. 3B, shows an
embodiment of a heat storage device 1 according to the invention
that has a container 10 having a shell 11 that delimits an interior
space I of the container 10, wherein a heat storage medium P in the
form of a phase change material is arranged in the interior space
I. In the interior space I of the container 10, in addition, a
plurality of tubes 24 are arranged each of which extend along a
longitudinal axis, wherein the longitudinal axes proceed parallel
to the vertical z, relative to a state arranged according to
specifications of the heat storage device 1. The tubes 24 in this
case are surrounded by the heat storage medium P and contact it in
such a manner that a fluid F conducted in the tubes 24 can come
into an indirect heat transfer with the heat storage medium P. The
tubes 24 are constructed in accordance with FIG. 3A or FIG. 3B.
[0038] Each tube 24 is constructed to conduct said fluid F along
the vertical z downwards. At a lower end section 24a, the tubes 24
are connected via a flow connection each to a central header tube
25, in which the fluid F is conducted back upwards. The flow
connections can be formed, e.g., by tube conduit sections 245
proceeding along the horizontal, which tube conduit sections
connect the respective tube 24 to a lower section of the header
tube 25.
[0039] The fluid F is then introduced into the respective tube 24
by means of a distributor 35 preferably at an upper end 24b of the
respective tube 24, then flows downwards along the vertical z or
longitudinal axis in the respective tube 24 and then flows via the
tube conduit sections 245 into the header tube 25 and then flows
therein back up (the distributor 35 can also be constructed as a
double tube sheet in the manner of FIG. 2, wherein the tubes 24 are
anchored in the first tube sheet 310 and the header tube 25 in the
further tube sheet 320). In this case, the fluid F, on its path
downwards in the tubes 24, can exchange heat with the heat storage
medium P. Thus, for example, the fluid F can melt the heat storage
medium P that is situated in the solid state of matter, wherein the
heat storage medium P takes up relatively much heat energy (heat of
melting). At a later time point, the heat storage medium P can be
run down as required, by bringing the heat storage medium P to
solidification, wherein the heat storage medium P gives off the
amount of heat previously taken up as heat of solidification back
to the fluid F conducted in the respective tube 24, which fluid is
correspondingly warmed.
[0040] In addition, the header tube 25 can have a heat insulation
253. Thus, the header tube 25 can be constructed as a double tube
that comprises an inner tube 252 and also an outer tube 251
surrounding the inner tube 252, wherein the heat insulation 253 can
be arranged in a ring gap 254 between the inner tube 252 and the
outer tube 251 of the header tube (25).
[0041] Owing to the circumstance that the respective tube 24 is
charged with the fluid F at the upper end 24b, or the fluid F is
taken back off at the upper end of the header tube 25, a tube sheet
at the lower end 24a of the tubes 24 can be dispensed with. The
load of the heat storage medium P therefore need not in turn be
intercepted by a lower tube sheet, but can be introduced in a
correspondingly strengthened substrate, or into a suitably
dimensioned container bottom of the container 10.
[0042] A typical cross section of a tube 24 according to the
invention is shown in FIG. 3A. In this case, the respective tube 24
preferably has a cylindrical shell 210, from which heat transfer
fins 211 project in a radial direction, which fins ensure an
enlargement of the effective surface area of the shell 210 of the
tube 24, in such a manner that the heat transfer between the
respective tube 24 and the surrounding heat storage medium P is
improved.
[0043] FIG. 3B shows a further embodiment of a tube 24 according to
the invention, wherein, in contrast to FIG. 3A, here the heat
transfer fins 211 are fixed to separate dish-shaped carriers 212,
213 that are fixed in pairs to the shells 210 of the tubes 24. In
this case, the carriers 212, 213 that are arranged on a shell 210
can be fixed to one another, in order to achieve an attachment to
the respective outer tube 21.
[0044] FIG. 2 shows an embodiment of a distributor 35 that is an
alternative to FIG. 1, which can be used in a heat storage device 1
according to FIG. 1 instead of the distributor 35. The distributor
35 in this case is constructed as a double tube sheet which has two
parallel tube sheets 310, 320, namely a (first) tube sheet 310, in
which the header tube 25 is anchored, and also a parallel further
(second) tube sheet 320, in which the respective tubes 24 are
anchored. Between the two tube sheets 310, 320, a first chamber 301
is then formed, into which the liquid medium F can be introduced,
in such a manner that it can pass into the respective tubes 24
through through-flow openings 311 of the first tube sheet 310. In
addition, the liquid phase F which is returned in the header tube
25 can be passed through through-flow openings 321 of the further
tube sheet 320 into an adjacent second chamber 302, from which the
liquid phase F can be taken off and fed to further use.
[0045] FIG. 4 shows a sectional view of a further heat storage
device 1 according to the invention. The heat storage device 1
comprises a container 10a in the form of an inner container, the
shell 11a of which surrounds an interior space I of the container
10a, wherein a heat storage medium P is arranged in the interior
space I. The container 10a is arranged in this case in an interior
space that is delimited by a shell 11b of an outer container 10b,
in such a manner that, between the inner container 10a and the
outer container 10b, an intermediate space is provided which is
preferably evacuated and is filled with a heat insulation 10c, e.g.
in the form of a bed.
[0046] The container 10a is preferably mounted or suspended via a
suspension bracket 12 on the shell 11b of the outer container 10b.
The weight of the two containers 10a, 10b is introduced into the
substrate via feet 13 of the outer container 10b.
[0047] For charging the interior space I of the container 10a with
heat storage medium P, or for removing heat storage medium P from
the interior space I of the container 10a, a port 600 is provided
which preferably has a heating device 601, such that the heat
storage medium P can be kept in the liquid state of matter during
discharge or inflow.
[0048] For the heat transfer with the heat storage medium P, a
multiplicity of tubes 24 are provided in the interior space I of
the container 10a, which tubes in each case extend along the
vertical z and are surrounded by the heat storage medium P or
contact this. The tubes 24 can in turn, as already described above,
have heat transfer fins 211 (e.g. according to FIGS. 3A and 3B
without inner tubes 22).
[0049] The tubes 24 are in addition anchored in a tube sheet 401 of
a distributor 400 of the container 10a, by an upper end 24b, on
which the tubes 24 each have an upper end-side opening 242, in such
a manner that the fluid F is feedable into the respective tube 24
or is removable therefrom via the tube sheet 401, and can be
conducted therein downwards or upwards. In this case the tube sheet
401 with an upper cover 10d of the container 10a delimits a chamber
404 of the distributor 400, into which chamber the fluid F is
introducible into the chamber 404 via a port 405 which is arranged
on the upper cover 11d of the outer container 11b, and also a tube
conduit 402 connecting to the port 405 which opens out into the
chamber 404. Likewise, the fluid F can be taken off via the tube
conduit 402 and the port 405 from the chamber 404. In addition, the
fluid F that is introduced into the chamber 404 can pass via the
tube sheet 401 into the tubes 24 or can be taken off from the tubes
24 via that chamber 404.
[0050] On a lower end section 24a, the tubes 24 have an end-side
lower opening 241, via which the tubes 24 each open out into a
header 500. The header 500 has a shell 501 which is constructed to
be cylindrically symmetrical to the longitudinal axis of the
container 10a (or the header tube 25, see hereinafter) and delimits
an interior space I'' of the header 500, wherein an upper region
502 of the shell 501 or of the header 500 is constructed so as to
be a spherical segment shape. The tubes 24 in this case open out
via said upper region 502 into the interior space I'' of the header
500.
[0051] To remove the fluid F from the header 500 or for
introduction of the fluid F into the header 500, in turn, a
vertical header tube 25 is provided that runs parallel to the tubes
24, more precisely centrally in the container 10a along the
vertical longitudinal axis of the container 10a, wherein the tubes
24 are preferably arranged radially further outside and are
preferably grouped around the header tube 25. The header tube 25
has a lower end-side opening 250, via which the header tube 25
opens out into a highest point of the header 500. The header tube
25 is passed through the tube sheet 401 with its upper end section
25a and is flow-connected to a port 406 on the upper cover 11d of
the outer container 11b, via which port the fluid F is removable
from the header tube 25 or via which the fluid F is introducible
into the header tube 25. The heat storage device 1 is therefore
configured in such a manner that the feeding and removal of the
fluid F proceeds from the top.
[0052] For loading the heat storage device 1 (i.e. storage of
heat), the fluid F, e.g. steam, is fed into the tubes 24 via the
distributor 400, i.e. via the port 405, the chamber 404 and the
tube sheet 401, flows downwards in the tubes 24, wherein heat is
given off to the heat storage medium P, which is liquefied in the
course of this. The cooled fluid F (e.g. cooled steam) is taken off
again via the header 500 and the header tube 25 and also the port
406 and supplied to the further use thereof. To run down the heat
storage device 1 (i.e. discharge of heat), the fluid F (e.g. water)
is added into the header tube 25 via the port 406, flows therein
downwards into the header 25 and is passed back upwards therefrom
via the tubes 24 and is taken off via the distributor 400. In the
tubes 24, the fluid F can take up heat from the heat storage medium
P, which in this case can be made to solidify.
[0053] To avoid cavities in the event of a solidification of the
heat storage medium P, a central region 13 of the interior space I
of the container 10a surrounding the header tube 25 is provided in
which central region none of the tubes 24 is arranged, in such a
manner that substantially no heat transfer takes place there. Via
this region B, in the event of solidification of the heat storage
medium P, fluid heat storage medium P is subsequently supplied. An
amount of fluid heat storage medium P required therefor is provided
in a partial volume V of the interior space I of the container 10a
at the upper end 24b of the tubes 24. In this region or partial
volume V of the interior space I, the tubes 24 preferably have no
heat transfer fins 211, in order to decrease the heat transfer
here. The partial volume V is labeled by the two levels P' and P''.
The solid solidified heat storage medium P has the lower level P';
the liquid heat storage medium P has the higher level P''. In
addition, the tubes 24 likewise have no heat transfer fins 211 in
each case at the lower end section 24a, via which the tubes 24 open
out into the header 25. These lower end sections 24a of the tubes
24 can, furthermore, have a bend or a kinked course, in such a
manner that the tubes 24 can each open out perpendicularly into the
shell 501 of the header 500.
REFERENCE SIGNS
TABLE-US-00001 [0054] 1 Heat storage device or latent heat store
10, 10a Container, in nartieular inner container 10b Outer
container 10d, 11d Cover 11, 11a, 11b Shell 12 Suspension bracket
13 Foot 25a Lower end 24b Upper end 251 Outer tube 252 Inner tube
254 Ring gap 24 Tube 24a Lower end section 25 Header tube 25a Upper
end section 35, 300, 400 Distributor 31 Annular tube conduit 32
First chamber 33 Second chamber 210, 240 Shell 211 Heat transfer
fins 212, 213 Carrier 220, 250, 241 Lower end-side opening 221, 242
Upper end-side opening 222, 253, 10c Heat insulation 245 Tube
conduit section or flow connection 301 First chamber 302 Second
chamber 310, 401 Tube sheet 311 Through-flow opening 320 Further
tube sheet 321 Through-flow opening 402 Tube conduit 404 Chamber
405, 406, 600 Port 500 Header 501 Shell 502 Upper region B Free
region I, I', I'' Interior space F Fluid P Heat storage medium P',
P'' Level V Volume Z Vertical
* * * * *