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Патент USA US3098531

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July 23, 1963
H. H. L. RITZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
7 Sheets-Sheet 1
July 23, 1963
H. H. L. RITZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
7 Sheets-Sheet 2
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July 23, 1963
H. H. |_. RlTZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
7 Sheets-Sheet 3
July 23, 1963
H. H. L. RlTZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
'7 Sheets-Sheet’ 4
July 23, 1963
H. H. L. RlTZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
-
7 Sheets-Sheet 5
1/,"
15/ if? 24/ w
July 23, 1963
H. H. L. RlTZ
3,098,521
REGENERATIVE HEAT EXCHANGERS
Filed July 20, 1955
7 Sheets-Sheet 7
United States Patent 0 ” Ice
Patented July 23, 1963
2
1
An object of the invention is to provide a sleeve valve
3,698,521
REGENERATIVE HEAT EXCHANGERS
Hugo Heinrich Ludolf Ritz, Newcastie-upon-Tyne, Eng
land, assignor to Q. A. Parsons & Company Limited,
Newcastie-upon-Tyne, England
Filed July 20, 1955, Ser. No. 523,244
Claims priority, application Great Britain Aug. 9, 1954
3 Claims. (Cl. 165-7)
operated regenerative heat exchanger suitable for a large
range of mass ?ows which will tend to overcome these
difliculties.
According to an embodiment of the invention a re
generative heat exchanger comprising a heat storing
matrix and a sleeve valve arrangement for controlling the
?ow through the matrix of relatively hot and cold ?uids
between which heat exchange is to occur, the matrix be?
The invention relates to a valve arrangement and is 10 ing constructed in two portions spaced apart from each
other within a housing and having inlets and outlets so
arranged that the hot ?uid is admitted to at least one
application of such an arrangement to a regenerative heat
of the matrix portions through an inlet positioned there
exchanger of the kind in which ?uids in heat exchanging
between and substantially the whole of the hot ?uid is
relationship alternately impart heat to and absorb heat
from a matrix under the control of the valve arrange 15 caused to how through the matrix portion outwardly of
the housing to an end outlet thereof and that the cold
ment.
?uid is admitted to at least one of the matrix portions
According to the bro-ad aspect of the invention a valve
through an inlet at an end of the housing and substan
arrangement for controlling the ?ow of at least one ?uid
tially the whole of the cold ?uid is caused to flow inward
comprises a casing having at least two portions of dif
ferent cross-sectional dimensions each portion having 20 ly of the housing through the matrix portion to an outlet
between the matrix portions, and the sleeve valve arrange
ports for ?ow of ?uid therethrough, a movable tubular
ment comprising two sleeve valves interconnected for
valve element positioned within the casing and having
simultaneous operation, one sleeve valve controlling the
openings at each end thereof and longitudinally arranged
inlet to and the outlet from one matrix portion of ?uid
portions of cross section appropriate for sliding co-opera
to be heated whilst the other sleeve valve controls the
tion with the casing portions to open and close the ports
inlet to and outlet ‘from the other matrix portion of ?uid
therein.
to be cooled, each sleeve valve including a hollow tubular
‘In a preferred form of the valve arrangement the eas
sleeve having end portions and a central portion of larger
ing and the valve element each have two portions of
diameter than the end portions and co-operating with a
smaller cross section and a portion of larger cross sec
tion therebetween. The valve elements may be arranged 30 similarly shaped casing having ports positioned in the
?ow paths of the ?uids ‘and arranged to be covered or
to ‘ reciprocate.
uncovered by the sleeve.
In a further preferred form of the invention two valve
Two embodiments of the invention as applied to a
elements each arranged within its own casing are inter
regenerative heat exchanger will now be described by way
connected for simultaneous operation.
particularly though not exclusively concerned with the
As aforesaid the valve arrangement according to the '
invention has a particular application in regenerative heat
exchangers ‘one form of which is described in my co
of example with reference to the accompanying drawings
in which:
FIGURE 1 shows a general arrangement in section of
a first embodiment of the heat exchanger in which two
pending application No. 359,182 in which the heat ex
sleeve valves are in a common housing;
changer. comprises a heat storing matrix and a sleeve
FIGURE 2 shows the housing of the heat exchanger in
valve arranged to control the ?ow through the matrix of 40
half section;
hot and cold ?uids between which heat exchange is to
FIGURE 3 shows an end view of the housing in half
occur, the matrix being constructed in two portions
section on line 2—2 of FIGURE '2;
spaced ‘apart from each other within a casing on either
‘FIGURE 4 shows in section an end cover;
side of a centre-line thereof, the arrangement being that
FIGURE 5 shows an end view of FIGURE 4 looking
the hot ?uid is admitted between the matrix portions and
in the direction of the arrow F.
substantially the whole of the hot ?uid is caused to ?ow
FIGURE 6 shows an end view of FIGURE 4 looking
through at least one of the matrix portions outwardly of
in the direction of the arrow G.
the casing to an end outlet thereof and that the cold ?uid
is admitted to at least one of the matrix portions at an
FIGURE 7 shows a section on line 7—7 of FIGURE 4;
FIGURE 8 shows in section one of the sleeves;
end inlet of the casing and substantially the whole of the
FIGURE 9 shows a section through a lubricating boss;
cold ?uid is caused to ?ow inwardly of the casing through
FIGURE 10 shows a section on line 10—10‘ of FIG
the matrix portions, to an outlet between the matrix por
URE 8;
‘
tions, the matrix portions being submitted, under the con
FIGURE 11 shows a section through a second embodi
trol of the sleeve valve, to the passage therethrough of 55
ment of the invention in which the sleeve valves are in
the hot and cold ?uids alternately.
separate housings;
The heat exchanger described in that application con_
FIGURES l2 and 13 show two extreme positions of the
sists of a single sleeve moving so as to control the inlets
and outlets in such a way that while one matrix portion
sleeves during operation; and
FIGURE 14 illustrates a suitable control mechanism.
In carrying the invention into effect in one form by
being submitted to the cold ?uid. In an alternative ar
way of example namely the form in which the two sleeves
rangement both matrix portions are submitted to one ?uid
are in a common housing and referring ?rst of all to FIG
at the same time and then in turn to- the other ?uid.
URE 1, a housing 1 is open at each end and houses in its
Forms are also described therein in which the matrix
central portion two ported cylinders 2 and 3 which form
portions move with the sleeve or are stationary.
65
sealing surfaces for the central portions of the sleeves.
When such heat exchangers are required to handle
End plates 4 and ‘5 are bolted to each end of the housing.
large mass ?ows the use of one sleeve to control the two
Formed integrally with each end plate are two ported
matrix portions means that the port areas must be of a
cylinders of smaller diameter than the centrally situated
similar size the size being based on the maximum volume
ported cylinders v2, and 3. Cylinders 6 and 7 are asso
of the ?uid ?owing therethrough and as a result the prob
ciated with end plate 4 whilst cylinders 8 and 9 are as
lem arises of keeping down the size of the regenerator
is being submitted to the hot ?uid the other portion is 60
especially the moving parts and of keeping distortion to
a minimum.
sociated with end plate 5. The end cylinders 6 and 7
and 8 and 9 form sealing surfaces for the end portions
3,098,521
4
u
of the sleeves and extend inside the housing to within a
short distance of central cylinders 2 and 3, end cylinders
6 and 8 being in axial alignment with central cylinder 2
whilst end cylinders 7 and 9 are in axial alignment with
central cylinder 3. A sleeve 10 consisting of a hollow
tube having an enlarged central portion 10a slides with
its ends 10b, 100, in cylinders 6 and 8 respectively whilst
the central portion 10a slides in cylinder 2. Similarly
sleeve '11 having an enlarged portion 11a slides with its
There is a position during the change over of the sleeves
when all the ports are covered but this is only momentary
and does not affect the continuous working of the gas
turbine plant and means that the heat exchanger, as de
scribed, is continuous in operation.
A wall 33 running at right angles to the plane of the
paper for the full width of the housing prevents leakage
between space 23 ‘and space 24.
Each sleeve has sealing rings 34 ?tted in both end and
ends 11b, 11c, in cylinders 7 and 9 respectively whilst its 10 central portions and these sealing rings prevent the leak
central portion slides in cylinder 3.
age of gas between sleeve and containing cylinder.
A matrix portion 12 consisting of wire gauze, mesh or
In the enlarged central portion of each sleeve equally
corrugated sheets is inserted in a space between cylinders
spaced radially extending vanes are formed integrally
i6 and 7 and the housing 1 in such a way that, looked at
with the sleeve and terminate in a central hub.
in end elevation, it has a shape conforming to that of the
These vanes are indicated at 35 in sleeve 10 and the
housing 1. A matrix portion 13 is arranged in similar
hub by numeral 36 Whilst the vanes in sleeve 11 are
fashion at the other end of the housing.
represented by numeral 37 and the central hub by nu
The matrix portions may, however, be arranged to fully
meral 38.
surround each sleeve.
The inside of each sleeve is kept cool by the cold
The matrix 12 is enclosed at its outer periphery by a
compressed air in one case, namely that of sleeve 10,
radiation shield 14 which is separated from the housing
whilst the inside of sleeve 11 is kept cool by the cooled
1 by spacers 15 thus keeping a layer of insulating air be
exhaust gases from the turbine and the presence of the
tween the shield and housing 1. -A similar shield 16 is
vanes helps to ensure e?icient distribution of the cool air
arranged at the outer periphery of matrix 13.
and gas into the ‘enlarged central portion of each sleeve
The heat exchanger operates in the following manner
for cooling purposes.
when used to preheat air in a gas turbine plant:
Radiation shields 39, 40, 41 and 42 backed by ?lms
‘Cold high pressure air leaving the compressor on its
of insulating air also help to keep the sleeves cool by in
way to a combustion chamber is conducted to the heat
sulalting them from the hot gases from the turbine or
exchanger via inlet A and, in the position of the sleeves
the air after it has been heated. Radiation shields may
shown, it passes through the sleeve .10 for its full length
also be provided on the sloping faces of ‘the enlarged por
and then passes through ports 17 in cylinder 8 entering
tion of each sleeve.
space 18 prior to entry into matrix 13 which has previous
Each sleeve is actuated by an oil operated piston; sleeve
ly been heated. in the matrix 13 it receives heat and
10 being actuated by piston 43 and sleeve 11 by piston 44.
then enters space 19 from which space it passes through
A lever 45 rotating about pivot 46 is linked to both pis
ports '20 in a liner 21 of central cylinder 2 and thence
tons so as to synchronise their movement.
through ports 22 in cylinder 2 coincident with ports 20‘ in
Piston 43 consists of an enlarged end 43a, a hollow
liner 21 to enter space 23 from which space it leaves the
central portion 43b and a further portion 430 containing
heat exchanger via a duct, not shown in this ?gure, but
an oil passage 47. This end portion 43c passes through
which is shown in FIGURE 2, item 60, on its way to a
hub 36 and is secured to the hub by means of a nut 48
40
combustion chamber.
so that movement of the piston 43 causes movement of
During the time this is taking place exhaust gases from
sleeve 10. The end portion 43a and part of the central
the turbine are being led into space 24 via an inlet duct
portion 43b slide in a cylinder ‘49 formed integrally with
not shown in this view, but which can be seen in FIG
URE ‘2, item 59, from which space the exhaust gases pass
through ports '25- in cylinder 3 and then through coinci
dent ports '26 in a liner 27 of cylinder 3, through space 218,
to matrix 12 where they give up their heat content, thence
through ports 29 in cylinder 7 into the centre of the end
portion of cylinder 7 from which they pass to outlet B
from the heat exchanger.
The sleeves 10 and ‘11 remain in this position for a
predetermined time, which is based on the time taken to
effect efficient heat exchange, and are then switched over
by means which will be described later to the limit of
their travel in the opposite direction, that is to say sleeve
10 moves towards the left of the drawing until its right
hand end uncovers ports 30 in cylinder 6 and simulta
neously sleeve 11 moves towards the right until ports 31
in cylinder 9 are uncovered.
Air entering the heat exchanger via inlet A can now
enter matrix 12 via ports 30 and space 32. After being
heated in matrix 12 it enters space 28 from which space
it passes through ports 20 and 22 in liner ‘21 and cylinder
a dished end cover 50 which is bolt-ed to end cover 5 of
housing 1.
Piston 44 is ‘similarly constructed, is attached to sleeve
11 and slides in a cylinder 50 formed integrally with a
dished end cover 52 which is also bolted to end cover 5.
Attached to end 430 of the piston 43 is a three way
metering valve 53 for distributing lubricating oil through
pipes indicated by chain lines in sleeve 11 to the sealing
rings 34.
A similar valve 54 is ?tted to the end of piston 44. In
operation 1lubricating oil, is, in the position of the sleeves
shown, admitted under pressure through oil holes (simi
lar .to those shown dotted in sleeve 11) in the cylinder 49
to a space 55 between the sloping face of piston 43a and
the head of cylinder 49 thus forcing piston 43 and thence
the sleeve :10 towards the left of the drawing. The oil
also passes through oil ports 56 into» section 43b of piston
43 and ‘then flows through passage 47 to the three way
metering valve 53 from which it is conducted via pipes
shown in sleeve 11 as a chain line to sealing rings 34 in
sleeve 10.
2 respectively into space 23 where it leaves via a duct as
At the instant at which oil is admitted to space 55 in
65
before and is conducted to the combustion chamber.
cylinder 49 the oil pressure in space 57 of cylinder 51
At the same time hot exhaust gas from the turbine is
is released and the oil allowed to drain out of holes in
entering space 24 as before, passing through ports 25 and
26, entering space 19 and passing from there into matrix
13 where it gives up its heat content before entering space
the cylinder (shown dotted) adjacent to the cylinder
head, under the action of part ‘44a of piston 44 which,
due to the linkage with piston 43 by lever 45, now moves
18 passing through ports 31 and then ?owing through 70 towards the right of the drawing moving sleeve 11 with
the full length of sleeve 11 to leave the heat exchanger
it.
via outlet B.
This completes the cycle and the movement of the
During the reverse operation of the sleeves oil passes
through passage 58 in part 44c of piston 44 and enters
sleeves takes place at regular intervals during operation. 75 metering valve 54.
3,098,521
5
Referring now to FIGURES 2 and 3 an inlet for the
hot gas is indicated at 59 whilst an outlet for the pre
heated air on its way to the combustion chamber is indi
cated at 60.
6
shape to sleeve 107 but of larger diameter and which, in
its turn consists of two end portions and a central por
tion 113a of enlarged diameter, the sleeve sliding by
means of sealing rings 114 in cylinder ‘115. The end
Wall 61 which is frusto-conical in form completely
surrounds each of the cylinders 2 and 3 and ?lls the
space between these cylinders and the outer wall of the
covers and uncovers ports ‘118 in cylinder 115a.
casing 1 thereby sealing the end portion of the casing
from the central part except through cylinders 2 and 3.
the outer wall of housing 102 is a matrix or heat ac
portions ot the sleeve 1113 cover and uncover ports 1'16
and 117 in cylinder ‘1115 Whilst central portion 113a
Situated between the end portions of cylinder 115 and
Turning to FIGURE 4, the end cover shown is suitable 10 cumulating mass 119‘ in two parts ‘1119a and 11911. The
matrix is housed between inner and ‘outer cylindrical
for either of the end covers with reference numerals 4
walls .120 and 121 which are held together by rods 122
or 5 in FIGURE 1, except that end cover 5 of FIGURE
which act at the same time as spacers between four layers
1 has bolt holes 62 for supporting the pivot for the
lever 45.
forming each matrix ‘11%, 11%. The matrix consists
Turning to FIGURES 5 land 6 the matrix 12 is inserted 15 of a multitude ot small parallel channels for the flow
of the gases and is arranged in frusto-conical torm.
in space 6-3 being supported between walls 64 and the
The outer wall 121 is spaced ‘from the wall of housing
housing ‘1, the shape of the matrix conforming to the
102 to 1form an annular space 1123 ‘for the passage of
shape of the housing 1. Wall 65 on FIGURE 4 is also
gases on their way to the matrix. Separating the inner
shown.
20 wall 120 from the cylinder 1415 is an air gap 124 which
FIGURE 7 needs no further comment.
insulates the Wall ‘from the cylinder.
FIGURE 8 shows one of the sleeves 10 or 11 in cross
In operation in a [gas turbine plant ‘and referring par~
section and shows in detail the arrangements for lubri
ticularly to FIGURES l2 and 13 and ?rst to FIGURE 12,
cating the sealing rings.
in that ?gure air enters the regenerator ‘from the com
In the central portion of the piston is a hole 66 which
is connected to the three way metering valve of the piston 25 pressor and enters the inside of sleeve 1107 ?ows along
the ‘full length of the sleeve and leaves via ports 1110 in
as shown in FIGURE -1.
cylinder 109. It then enters duct ‘103 and is conveyed
A metering restriction shown dotted in FIGURE 1, is
to the annular space 123 in housing 102. From here it
screwed into the hole for the purpose of ensuring that the
enters matrix portion ‘119a via the space 125, ?ows
pressure drops between the three way metering valve and
through the‘ passages of the matrix ‘where it is heated
the various sealing rings are equal to ensure equal dis
and collected in space 126 which is in communication
tribution of the lubricating oil. From the hole 66 the
'with duct-104. Duct 104- conveys the heated air to space
oil enters oil holes 67 from which they enter the grooves
127 surrounding cylinder F109 trom which the air passes
for the sealing rings.
through ports 112 to be collected in annular space ‘128
The sealing rings in the end portion of each tube are
connected to the three way metering valves via bosses 35 from which it is led to the combustion chamber.
At the same time hot exhaust gas from the turbine
68 and 69. Boss 68 can be seen in this ?gure but boss
enters space 129 ‘from whence it ?ows through ports 118
69 can ‘also be seen in FIGURE 9.
into space 130 and thence it enters the matrix 11%.
The oil is conducted to each of these bosses the details
The ‘gas gives up its heat content to the matrix and then
of which are shown in section in FIGURE 9, and passes
leaves it, entering space 131 from which it passes through
through a metering restriction screwed into the boss into
ports 117 in the cylinder into space 132 which is in
hole 70 and thence through oil holes 71 to the bottom of
communication with an exhaust stack.
The sleeves are, after a predetermined time, switched
FIGURE 10 also shows the vanes 35 of FIGURE 1
over simultaneously to the position shown in FIGURE
and boss 36.
45 13. When in this position air from the compressor
‘In the above construction the use of one housing re
enters the inside of sleeve‘ 107, passes through ports 111,
duces production costs; end covers are identical in con
thence through duct 1% and then to annular space 123
struction; sleeves are identical in shape and size, the
surrounding matrix portion 11% from which space it
matrix may be attached to the end cover and can easily
enters space 131, ?ows through matrix 11912 Where it
be removed ‘for cleaning by removing the end cover; and
the grooves for the sealing rings.
lubrication of the sealing rings takes place from inside
50 receives the heat previously given up by the hot ‘gas
and then exhausts into space 130 ‘from which space it is
each sleeve which is cooled by either cold or cooled gas;
led via duct 105 to space 133 and thence through ports
the length of the sealing surfaces may be reduced whereas
1112 into space 128 from which it is led to the combustion
the sealing rings in the central portion of each sleeve
chamber as before.
are sealing all the time, the sealing rings at each end 55
At the same time hot exhaust gas from the turbine
of the sleeve are in sealing contact alternately so that
enters the matrix 1119:; via space 129, ports 1:18 and space
with say in all six effective sets of sealing rings only
126, gives up its heat and exhausts to atmosphere via
four need to be effectively sealing at any one time.
space 125, ports 116 and the inside of sleeve 1-13 to
Referring now to the alternative ‘form of heat exchanger
,
_
illustrated in FIGURES 1'1~14 and referring ?rst of all to 60 space 132.
‘Operation of the regenerator is effected or maintained
FIGURE 11 the heat exchanger consists of two housings
by intermittently switching the sleeves simultaneously
101 and 1012 each of which contains a sleeve. Con
from one position to the other.
necting each housing are four ducts 103-6 inclusive.
Referring once more to FIGURE 11 the central por
in the housing 101 is a sleeve 107 which as shown is
of smaller diameter than the sleeve in housing 102, is 65 tion of each sleeve has the tace containing the sealing
rings cooled every half cycle by the cooled exhaust gas
hollow and cylindrical and has a central portion 107a
in the case of sleeve 113 and by the cold air from the
of enlarged diameter. The sleeve 107 slides by means
compressor in the case of sleeve 107. Ribs 11314 in each
of sealing rings 108 in a cylinder 109 titted into the
sleeve assist in this cooling by de?ecting the flow of
casing ‘101. The central portion 107a of the sleeve 107
slides in a cylinder ‘of larger diameter 10% ?tted in the 70 gas or air.
The cylinder 115a is insulated tfrom the incoming gases
centre of the housing 101. The end portions of the
in space 129 by insulation shields 165 and the cylinder
sleeve, cover and uncover ports 110 and 1111 in the cyl
1109a in housing 101 by shields \136 from the hot com
inder 1019 whilst the central portion 107a covers and un
pressed air on its way to the combustion chamber from
covers ports 1:12 in the cylinder 109a.
In the lower housing 102 is a sleeve 113 of similar 75 annular space 128.
3,098,521
8
Pressure losses at the inlets to the various ports are
reduced by cutting away walls de?ning the entrances to
the ports so as to give a nozzle effect.
The temperature distribution in each sleeve is as before
symmetrical in that the ends of each sleeve are relatively
cool whilst the center portions 107a and 113a are hot.
This reduces distortion in the sleeves and in the housing.
Conical walls 137 are ‘attached to housing 102 and to
An oil pump 1'50 supplies oil to a continuously rotat
ing rotary valve 151 which supplies oil alternately to that
part of each of the cylinders 142, 145 which is on the
right hand side of each piston, through ducts 152 and
153. Filling the space in each cylinder between the pis
ton and end the covers 148 and 149 is a further quantity
of oil which can be displaced between each cylinder
through duct 154 which is always full of oil.
cylinder 115a and separate inlet space 129 from spaces
The valve 151 is so constructed that, in the position
126 and 130. Being of conical form, the walls exp-and 10 shown, duct 1152 is connected to the oil drain through
symmetrically and in consequence keep the sleeve accu
rately centred in cylinder 1115a.
The centre part 113a of the sleeve is also insulated
against the hot gases in spaces ‘126, 129‘ and 130 by in—
sulation shields 138.
The central part of housing 102 is in two halves and
bolted along ?anges 139. The housing at this point is
protected from the hot gases entering annular space 129
by insulating shield 140 which is spaced from the housing
by rings 141 and the spaces ?lled with insulating material.
This central part of housing 102 is also free to expand
axially due to clearances not shown between the ?ange
139 and wall 137.
The switching of the sleeves I107 and 113 from the posi
duct 155 whilst duct 153 is in communication with pump
150.
This condition is maintained for a predetermined length
of time which is su?icient to allow adequate heat transfer
to take place between the hot gases, the cold high pres
sure air and the matrix portions.
After this time has elapsed the valve 151 cuts ed the
supply of oil to duct 153 from oil pump 150 and puts
duct 153 in communication with the drain through duct
20 155. The sleeve 1113 then begins to move towards the
right under the action of the :forces exerted by the high
pressure air on enlarged part 113a as described earlier
and in doing so moves piston ‘146 to the right displacing
oil through duct 153 to drain through ‘duct 155. At the
tion shown in FIGURE 12 to the other shown in FIG 25 same time pump 150 supplies oil through duct 152 to
URE 13 is effected by the forces exerted on the sleeve
the right hand side of piston 143 forcing it to the left
by the heat exchanging gases themselves due to the dhfer
and displacing oil through duct 154 to the left hand side
ence in the dimensions of the sleeves in conjunction with
of piston 146 thus ensuring synchronisation of movement
a suitable control mechanism whose tunction is to hold
between the two.
the sleeves in each position shown ‘for a predetermined
Any leakage past the pistons 145, 146 which may aifect
time and then release them. The control mechanism must
the volume of oil ?owing in duct 154 can be compen
also, during movement ensure that the sleeves are syn
sated by a system of non-return valves connected to duct
chronised that is to say they each pass through the neu
154 for replenishing any oil lost or bleeding off any oil
tral position at the same time. In other words ‘when sleeve
causing an increase in volume. Alternatively the non—
107 is at the position where ports 112 are cut Off, sleeve 35 return valves may be ?tted in the pistons themselves.
113 should be in the position where ports 118 are cut
Such leakage will in most cases however be so small
olf from the‘?ow of the gases.
as to have no appreciable re?ect on the synchronisation
When the sleeves are in the position shown in FIGURE
of the sleeves.
12 high pressure air in space 126 exerts a force on sleeve
According to another method the sleeves are linked
113 tending to move it towards the right of the drawing.
mechanically through a rod attached to each sleeve at
lImmediately the control mechanism releases the sleeves,
its ends and pivoted in the centre. The retention of the
sleeve 113 accelerates towards ‘the right and at the same
sleeve in the extreme end conditions may be effected by
time sleeve 107 moves towards the left accelerating also
the hydraulic means.
but against the force exerted on its central part 107a by
It can be seen that in both the forms illustrated tem
the high pressure gas in space 127 which ‘force tends to
perature symmetry is ‘achieved in an axial direction in
reduce ‘the acceleration of sleeve 107 and in view of the
each housing. In each case the central portion of one
linked movement, sleeve 113 also.
sleeve controls the inlet of the heat releasing gas before
As each sleeve passes the neutral position the pressure
cooling whilst the central portion of the other controls
conditions are reversed and the high pressure gas now
the outlet of the heat absorbing gas after it has been
admitted to space 130 \acts against the movement of the
heated. The central portions of the housing are there
sleeve 113 decelerating it until it stops in the positions
fore always subject to hot gas. The end portions on
shown in FIGURE 13. The sleeves are held in this posi
the other hand are always cool, one sleeve controlling
tion for a predetermined time and then released and they
the admission of the heat absorbing gas before it is
move back to the position shown in FIGURE 12 under
heated whilst the other controls the outlet of the heat
the action of the forces exerted by the high pressure air. 55 releasing gas after it has been cooled. This fact coupled
A suitable control mechanism is shown diagrammati
with the fact that the sleeves :also act as ducts for cold
cally in FIGURE 14. The matrix, housings 101 and 102,
gas namely cooled heat releasing gas on the one hand
and interconnecting ducts have ‘been omitted and {only
and cold heat absorbing ‘gas on the other means that
the sleeves 107 and 113 in their respective cylinders 109
the temperature increases progressively from the ends of
and 115 are shown.
the housing towards the centre.
At the left hand end of each housing is ?tted a cylinder
Further the sleeves in both cases are of simple con
containing a piston which is hydraulically operated by
struction, are ‘light and the fact that they contain no
some substantially incompressible ?uid such as oil.
ports means that distortion is kept to a minimum.
Cylinder 142 is attached to cylinder 109 which in turn
Other advantages are obtained from a production point
is ?xed to housing 101 as shown in FIGURE 11. The 65 of view if the sleeves are identical in size, but this factor
piston 143 in cylinder 142 is attached to sleeve 107 by
may be outweighed by the desirability of making the high
rod .144 which may be hollow, the rod being bolted to
pressure sleeve of smaller dimensions when mass ?ows
the central hub in the enlarged portion of the sleeve from
are very large.
which ribs 134 as shown in FIGURE 1 radiate.
As aforesaid the valve arrangement per se is within
A similar cylinder 145 containing piston 146 is at 70 the scope of the present invention and the preferred
tached to cylinder 115 in housing 102 and is similarly
form of the valve arrangement has been described and
attached to the central hub in the enlarged portion 113a
illustrated in FIGURE 8 whilst a form of valve element
of the sleeve 113 by rod 147 .
is shown in FIGURES 8 and 10".
Sealing the extreme left hand end of each cylinder
I claim:
142 and 145 are end covers 148 and 149 respectively.
1. A regenerative heat exchanger comprising a heat
75
3,098,521
10
storing matrix and a sleeve valve arrangement for con
trolling the ?ow through the matrix of relatively hot and
cold ?uids between which heat exchange is to occur,
the matrix being constructed in two portions spaced apart
valve member, third ?ow‘path de?ning means for an
other of said ?uids and extending through an aperture
in said enlarged portion of another of said casings, under
the control of said enlarged portion of the valve member
arranged to cooperate therewith, to another of said
matrices, fourth ?ow-path de?ning means from said other
from each other within a housing and having inlets and
outlets so arranged that the hot ?uid is admitted to at
least one of the matrix portions through an inlet posi
matrix and through an aperture in at least one end por
tioned therebetween and substantially the whole of the
tion of said other casing under the control of said other
hot ?uid is caused to flow through the matrix portion
valve member, said second and third ?ow-path de?ning
outwardly of the housing to an end outlet thereof and 10 means being positioned wholly outside said valve mem
that the cold fluid is admitted to :at least one of the matrix
bers, connecting means between said valve members and
portions through an inlet at an end of the housing and
means to effect simultaneous sliding movement of said
substantially the whole of the cold ?uid is caused to
valves with respect to said casings.
?ow inwardly of the housing through the matrix portion
‘3. A regenerative heat exchanger comprising at least
to an outlet between the matrix portions, and the sleeve 15 two heat storing matrices and a valve arrangement for
valve arrangement comprising two sleeve valves inter
controlling the ?ow of fluids between which heat is to
connected for simultaneous operation, one sleeve valve
be exchanged, said valve arrangement comprising at least
controlling the inlet to and the outlet from one matrix
two continuous trubul-ar open-ended valve members hav
portion of ?uid to be heated whilst the other sleeve
ing end portions and a portion of enlarged cross-section
valve controls the inlet to and outlet from the other 20 intermediate said end portions, a casing for each said
matrix portion of ?uid to be cooled, each sleeve valve
valve member, said casing having apent-ured portions ar
including a hollow tubular sleeve having end portions
and a central portion of larger diameter than the end
ranged for sliding cooperation with said end and enlarged
portions respectively of the valve member with which
the casing is arranged to cooperate, ?rst ?ow-path de
portions and co-operating with a similarly shaped casing
having ports positioned in the ?ow paths of the ?uids 25 ?ning means for one of said ?uids and extending through
and arranged to be covered or uncovered by the sleeve,
an aperture in at least one end portion of one of said cas
sealing between the sleeves and their associated casing
ings under the control of the valve member arranged
portions is eifected by means of sealing rings ?tted to
to cooperate therewith to one of said matrices, second
the sleeves and which said sealing rings are lubricated
?ow-path de?ning means from said one matrix and
by oil fed to grooves containing the rings from the in 30 through an aperture in said enlarged portion of said one
‘side of the sleeve which is kept cool at all times by cool
casing under the control of said enlarged portion of said
heat exchanging ?uid.
one valve member, third ?ow-path de?ning means for
2. A regenerative heat exchanger comprising at least
another of said ?uids and extending through an aperture
two heat storing matrices and a valve arrangement for
in said enlarged portion of another of said casings, under
controlling the ?ow of ?uids between which heat is to 35 the control of said enlarged portion of the valve member
be exchanged, said valve arrangement comprising at least
arranged to cooperate therewith, to another of said mat
two continuous tubular open-ended valve members hav
rices, fourth ?ow-path de?ning means from said other
ing end portions and a portion of enlarged cross-section
matrix and through an aperture in at least one end por
intermediate said end portions, a casing for each said
tion of said other casing under the control of said other
valve member, said casing having apertured portions ar
valve member, connecting means between said valve
ranged for sliding cooperation with said end and enlarged
members and means to e?ect simultaneous sliding move
portions respectively of the valve member with which
ment of said valves with respect to said casings.
the casing is arranged to cooperate, ?rst ?ow-path de?ning
References Cited in the ?le of this patent
means for one of said ?uids and extending through an
aperture in at least one end portion of one of said cas 45
UNITED STATES PATENTS
ings under the control of the valve member arranged to
cooperate therewith to one of said matrices, second ?ow
path de?ning means from said one matrix and through
an aperture in said enlarged portion of said one casing
under the control of said enlarged portion of said one 50
2,204,431
2,737,970
Moore et al ___________ __ June 11, 1940
Hasche et a1 __________ __ Mar. 13, 1956
158,352
Australia ___________ .._ Aug. 19, 1954
FOREIGN PATENTS
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