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Патент USA US3049116

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Aug. 14, 1962
A. HUET
3,049,107
LIGHT HEAT EXCHANGERS FOR USE IN NUCLEAR ENERGY INSTALLATIONS
Filed Dec. 9, 1957
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ZNVENTOR.
ANDRE HUET
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ATTORNEY.
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Unite
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Patented Aug. Ill, 19%2
it’
2
3,049,107
which provides a wide compensatory expansion coil before
ending up at tank i of the expanded evaporator at 1'1, ex
LIGHT HEAT EXCHANGERS FOR USE IN
NUCLEAR ENERGY INSTALLATIUNS
André Huet, 48 Ave. du President Wilson, Paris, France
Filed Dec. 9, H57, Ser. No. 701,597
Claims priority, application France Dec. 13, 1956
4 Claims. (Cl. 122-—5ltl)
panded as was ‘water tank e of the low pressure exchanger
(so as to readily permit providing a large water surface),
and the steam formed, after running through separator 0,
passes into header [2 which makes a wide loop before
going to superheater q in which there is provided a center
core ql. The superheated high-pressure steam goes out
at the top through pipe 1‘ which forms still another wide
The invention described herein covers improvements in
a heat exchanger installation as described, for example, 10 expansion compensation coil before running out of the
in prior patents of the applicant, and in particular, the
installation of component parts of the heat exchangers
proper, inside a vertical duct-jacket containing the same,
such installation being executed by suspension means
which connect, in series and directly one with another,
all the exchanger elements which are ?nally attached to
the top of the duct-jacket. Furthermore, the connection
method for the fluid lines between the various elements
of the whole is designed so as to give such lines great
?exibility, permitting absorption of all possible expansion
dilterences without increasing stress in the suspension and
support elements.
Lastly, where several steam producing items, operating
at di?erent pressures, are ‘found within a duct-jacket, the
water supply system and the superheated steam outlet
system of such various items of equipment are laid out
so that the in?ow of ‘water occurs at the bottom of the
duct-jacket and steam out?ow occurs at the top.
The following description, relating to the drawing at
tached, given as an example, will make it easier to under
stand the way in which the invention may be applied.
The single FIGURE of the drawing shows the installa
tion or" the present invention in schematic, partially inter
rupted, vertical section.
duct-jacket.
As called for by the present invention, all the elements
(economizers, evaporator-s, super-heaters) for the low as
well as the high-pressure exchangers, are hung from each
other inside duct-jacket a by means of rods or tie-rods
or chains such as S, three in number, for example, which
are at one end fastened to the cover of duct-jacket a and,
at the other to the center core q1 of top high-pressure
superheater q. A tie—rod t next connects: the bottom of
core <11 to water tank i of the high-pressure evaporator,
while another tie-rod it connects to core j1 ‘and to core it,
from ‘which hangs tie-rod 1/ running to tank e, connected
lastly by tie-rod w to core 01 of economizer c.
Coils making up the economizers and high and low
pressure superheaters all have a center core which causes
deviation of the ?ux of ?uid A toward the coils, and serves,
as we have just seen, for suspension of the whole.
It may be seen that with the layout adopted, all the
elements inside the duct-jacket are arranged in series inside
such duct and attached to the top of same, which assures
easy installation. Lastly, the piping connecting the various
elements to each other forms loops or coils inside the duct—
jacket so that expansion differences are absorbed and can
no longer adversely affect the suspension of the whole.
Inside duct-jacket a, through which the hot ?uid runs 35
Furthermore, the water supply assembly at the bottom
from top to bottom in the direction of arrow A, there are
‘and the steam outlet assembly at the top assure sirrrpli?ca~
provided two complete heat-exchanger elements identical
tion for the exterior piping system.
in principle. One, HP, located at the top, high-pressure,
It goes without saying that changes in details may
and the other BP, at the bottom, low-pressure. These two
be made in applying this invention while staying within
heat-exchanger elements are separated on the drawing by
the ‘framework thereof.
the dot-dash broken line Z—Z. Each high and low pres
What I claim is:
sure heat exchanger includes from top to bottom the
1. A heat exchanger particularly adapted ‘for nuclear
following: an economizer, an evaporator proper, and a
superheater.
For the low pressure heat exchanger located at the
bottom, water enters at b, runs through economizer c,
and passes through d into the evaporator proper. The a’
line makes a large loop or spiral before entering the evapo
rator so that expansion variations of the line are absorbed
by such spiral without increasing the stresses in the sus
pension arrangements, as described below. The BP evapo
rator consists of tubes 21 running around a center tank e.
energy installations, comprising, in combination, a cylin
45 drical vertical elongated duct-jacket having a length sub
stantially greater than its diameter and adapted to be
traversed ‘from one end to the other by hot ?uid coming
from a nuclear reactor, a plurality of vertically-spaced
heat-exchange assemblies disposed interior-1y of said duct
jacket and adapted to receive a second ?uid ?owing in at
the bottom of the lowermost of said assemblies and flow
ing out at the top of the uppermost of said assemblies,
said ?uid being adapted to absorb the heat of the in?owing
hot ?uid, each of said assemblies consisting of a plurality
header g of superheater h. Such header g also makes a 55 of di?erent heat-exchange elements, conduit means inter
wide spiral in the duct-jacket a so as to absorb expansion.
connecting said plurality of elements for continuous ?ow
Following superheating, the steam runs into the outlet
of ?uid therethrough, ?rst suspending means connecting
header hl which makes a wide loop to compensate for
together by suspension said plurality of elements inde
expansion and ends at the top of duct-jacket a running
pendently of said conduits, said elements being mutually
Steam obtained, after going into separator 1‘, passes into
laterally along one or more of the water tubes of the 60 suspended from each other, and second means for sus
high pressure evaporator i.
The HP high pressure exchanger consists likewise of
an economizer j and ‘water supply for such economizer j
starts at header d of the bottom, lowapressure economizer
which is, as shown on the ?gure, partially branched off
to l, ?owing out a duct~jacket a and running through
a circulating pump, not shown, which discharges the water
into line m which rises up through the center core c1 of
economizer 0 along water tank e of the low pressure
pending the uppermost element ‘from the upper portion of
the duct-jacket, said ?rst suspending means lying along
the longitudinal axis of said duct-jacket and the longi
tudinal axis of symmetry of each of said elements sub
stantially coinciding with said duct-jacket axis, said plu
rality of inter-suspended ‘assemblies receiving suspension
from said duct-jacket only at the uppermost portion
thereof.
2. A heat exchanger particularly adapted for nuclear
evaporator and the center core k1 of superheater h, ?nally 70 energy installations, comprising, in combination, a cylin
?owing out at the bottom portion of the economizer j.
drical vertical elongated duct-jacket having a length sub
The water ?ows out of economizer 1' through header n
stantially greater than its diameter ‘and adapted to be
3,049,310?
3
traversed from one end to the other by hot ?uid coming
from a nuclear reactor, a plurality of vertically-spaced
heat-exchange assemblies disposed interiorly of said duct
jacket and adapted to receive a second ?uid ?owing in at
the bottom of the lowermost of said assemblies and ?ow
ing out at the top of the uppermost of said assemblies,
said fluid ‘being adapted to absorb the heat of the in?ow
ing hot ?uid, each of said assemblies consisting of a plural
ity of diiierent heat-exchange elements, conduit means
interconnecting said plurality of elements for continuous
?ow of fluid therethrough, tie-rod means connecting to
gether by suspension said plurality of elements independ
ently or" said conduits, said elements being mutually sus
pended by said tie-rod means from the next superposed
element, and means ‘for suspending the uppermost element
from the upper portion of the duct-jacket, said tie-rod
means lying along the longitudinal axis of said duct-jacket
and the longitudinal axis of symmetry of each of said
elements substantially coinciding with said duct-jacket
axis, said plurality of inter-suspended assemblies receiving
suspension from said duct-jacket only at the uppermost
portion thereof.
3. A heat exchanger particularly adapted for nuclear
energy installations, comprising, in combination, a cylin
drical vertical elongated duct-jacket having a length sub
stantially greater than its diameter and adapted to be
traversed from one end to the other by hot ?uid coming
from a nuclear reactor, said duct-jacket including an inlet
and an outlet, a plurality of vertically-spaced heat-ex
from said duct-jacket only at the uppermost portion
thereof.
;
4. A heat exchanger particularly adapted for nuclear
energy installations, comprising, in combination, a cylin
drical vertical elongated duct-jacket having a length sub
stantially greater than its diameter and adapted to be
traversed from one end to the other by hot ?uid coming
from a nuclear reactor, said duct-jacket including an inlet
and an outlet, a plurality of vertically-spaced heat-ex
change assemblies disposed interiorly of said duct-jacket
and adapted to‘ receive a second ?uid ?owing in at the
bottom of the lowermost of said assemblies and ?owing
out at the top of the uppermost of said assemblies, said
?uid being adapted to absorb the heat of the iii-?owing hot
?uid, each of said assemblies consisting of a plurality of
di?erent heat-exchange elements, said elements including
at least one economizer having a core, at least one evapo
rator having a core, and at least one superheater having a
core connecting in series, said economizer consisting of
20 tubes coiled around said core, and said evaporator consist
ing of water tubes arranged spoke-fashion around said
evaporator core, in each assembly a ?rst tie-bar connect
ing an axial portion of the evaporator to the core of the
economizer, a second tie-bar connecting an axial portion
of the evaporator to the core of the superheater, a third
tie-bar connecting the core of each superheater other than
the superheater of the uppermost of said assemblies to the
core of the adjacent economizer, ‘fourth tie-bars suspend
ing the superheater of the uppermost of said assemblies
change assemblies disposed interiorly of said duct-jacket
from the top of the duct-jacket, water and steam conduits
and adapted to receive a second ?uid ?owing in at the
bottom of the lowermost of said assemblies and ?owing
connecting the economizer to the evaporator, and con
meeting the evaporator to the superheater, and connecting
out at the top of the uppermost of said assemblies, said
?uid being adapted to absorb the heat of the in?owing hot
?uid, each of said assemblies consisting of a plurality of
different heat-exchange elements, said elements including
the superheater to said outlet, said conduits ‘forming wide
coils inside the duct-jacket to absorb expansion, said tie
bars interconnecting said plurality of elements independ
ently of said conduits, said ?rst, second and third tie-bars
lying along the longitudinal axis of said duct-jacket and
at least one economizer having a core, at least one evapo
the longitudinal axis of symmetry of each of said elements
in series, in each assembly a ?rst tie-bar connecting an 40 substantially coinciding with said duct-jacket axis, said
plurality of inter-suspended assemblies receiving suspen
axial portion of the evaporator to the core of the econo
sion from said duct-jacket only at the uppermost portion
mizer, and a second tie-bar connecting an axial portion
of the evaporator to the core of the superheater, a third
thereof.
tie-bar connecting the core of each superheater other than
References @ited in the ?le of this patent
the superheater of the uppermost of said assemblies to the
core of the adjacent economizer, fourth tie-bars suspend
UNITED STATES PATENTS
rator, and at least one superheater having a core connected
ing the superheater of the uppermost of said assemblies
from the top of the duct-jacket, water and steam conduits
connecting the economizer to the evaporator, and connect
ing the evaporator to the superheater, and connecting the
superheater to said outlet, said conduits forming wide coils
inside the duct~jacket ‘to absorb expansion, said tie-bars
interconnecting said plurality of elements independently of
said ducts, said ?rst, second and third tie-bars lying along
the longitudinal axis of said duct-jacket and the longi
1,564,680
1,959,286
Kelly ________________ __ Dec. 8, 1925
Grebe _______________ __ May 15, 1934
2,119,118
2,328,039
2,508,247
2,547,589
Sengstaken ___________ __ May 31,
Toomey et al __________ __ Aug. 31,
Giaugue _____________ __ May 16,
Marshall _____________ __ Apr. 3,
Strunk _______________ __ May 22,
2,554,130‘
rality of inter-suspended assemblies receiving suspension
1951
FOREIGN PATENTS
tudinal axis of symmetry of each of said elements sub
stantially coinciding with said duct-jacket axis, said plu
1938
1943
1950
1951
762,416
Germany ____________ __ May 15, 1951
1,054,671
France ____,_____,___, ____ __ Oct. 7, 1953
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