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Патент USA US2404321

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' July'16, 1946.
'2',404,321 "
F. D. SHUMATE ET AL I
vCONDENSER CiRCULATING SYSTEM‘
Filed July 23, 1942 ._ _'
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Frank .27. .Ehizmate
Gav/'7:IN W
5551/7016’
ENTORS
I\
ATTORNEY /
Patented July 16,‘ 1946
2,404,321 r '
UNITED STATES PATENT,‘ OFFICE '’
2,404,321
CONDENSER CIRCULATING SYSTEM‘ 7 ’
Frank D. Shumate, Larchmont, N. Y., and George ,
W. Saatho?’, South Orange, N. J.;said~Shumate, ..
‘
> -
_ assignor to Worthington Pump and Machinery
Corporation, Harrison, N. J., a corporation of
' Delaware; said Saatho? assignor to Helen S‘.
’ Davis, Lexington, Mass.
Application July 23, 1942, Serial No.‘ 452,010’ , 1
12 Claims. (01. 257-44)
1
This invention relates to power plants or sys- v '
tems, and more particularly to cooling water cir
culating systems for surface steam condensers,
bir'ie, within the range determined 'by‘the depth
of the penstock, so that under varylng'conditions
of river level the’ maximum possiblefload canrvbe
thrown upon the turbine'idriven pump, thereby
putting the minimum possible 1oad upon the'mo
heat transfer or cooling devicesiemployed there
in.
.
Such power plants are often located upon rivers
and are dependent thereon for their supply of
cooling water. The water level of such rivers
varies widely with the ‘seasons and is further af
fected by rainfall. Or, the power plant may be
located at some height above the water level of
the source of supply of cooling water, as upon
a bluif adjacent a river or lake. In such locations,
10
'
‘14'
With these and other objects in ‘view, as may _
I appear from the accompanying speci?cation‘,- the,
15
_
tor driven pump and thus-keeping the‘ power'con
sumption of the motor driven pump at the lowest
possible point under all conditions of ‘varying: river
level.
the system of the present invention is particularly
desirable and adaptable. ,
More speci?cally, the present invention ‘em
bodies means of maintaining, by suitable control
means, any, static head upon the hydraulic tur
Patents No. “1,769,671,__issued July 1, 1930, and
1,762,115, issued June 3, 1930, refer to installations
invention‘ consists of various features of con;
struction and combination of parts,'which will be
?rst described in connection with the accompany
ing drawing, showing a condenser circulatin'g'sys
tem of the preferred form embodying the inven
Ohio River Valley, and describe the conditions
met therein. The invention of these prior pat 20 tion,'and the features forming the invention will
bespeci?cally pointed out in theolaims. l l ‘‘
~‘
ents deals with the provision of economical cir
In the drawing:
v
,
'
'
1
‘e
‘I
‘
culation of cooling water in power plants of this
Figure 1 is a,_'diagramm'atic view of ‘a system
type.
employing the present invention.
' F f v
The present invention provides, in a system of
‘ Figure 2 is a view on the line 2-2 of Figure 1
this kind, a primary motor driven pump vand a 25
showing the turbine and the adjustable inlet/‘gates .
secondary or booster pump driven by, a hydraulic
associated therewith.
_
turbine, the latter being operated by the return
Referring more particularly to the vdrawi’ng,'l
or discharging circulating cooling. water of the
indicates a surface condenser of anyapproved
condenser system, thus permitting both the pri
type
such as is employed in a, power plant'for
mary and secondary pumps to be designed with
condensing steam and through which condenser
characteristics required for most emcient and
cooling water is circulated for condensing the
practical performance of their respective duties,
steam
therein. The cooling water enters thecon
increasing the over-all efficiency and economy of
denser through the inlet pipe 2 and- lea’ve's-v it
of this character, such as those installations in the
the systemf
,
I
' ' '~ "
" ‘- =
An object of the present invention is to pro 35 through the outlet pipe v3.
v
The
cooling
water
is
taken
from‘
any'
suitable
vide, in a circulating cooling water system for
supply source (not shown) through the channel
steam condensers in a power plant of the class
4, and ispicked up by the primary motor" driven '
above referred to, meansv of varying the static
pump
5, from which it is discharged through‘the
head on the hydraulic turbine utilizing the cool
discharge pipe 6 into the suction of the secondary
ing water, after discharge from the condenser, as
or booster pump 1. The secondary or booster
its motivating power.
‘
pump 1 discharges the water through‘ suitable
Control of the static head on the hydraulic
piping 8 into the inlet piping 2 of the surface con;
turbine is provided by means of a penstock‘ or
control well between the circulating water outlet _
of the condenser and the inlet of the hydraulic
turbine, together with means for varying the
water level in such penstock or‘ control well
through a wide range.
Control of the static head on the turbine per- _
mits the hydraulic turbine driven pump to be
operated at its most efficient point in relation to
the total dynamic head thereon, the total dy
namic head on the motor driven pump, the static "
denser
I.
'
'
_
A by-pass 9 is provided in which a check valve
‘I0 is situated so that when the valve' H'in‘the
discharge piping E to the suction of the booster
pump 1 and the valve I2 in the pipe 8 are'closed,
the discharge from the primary pump 5'wil1pass'
directly into the by-pass 9 and into'the inlet'pipe
2, cutting out the booster pump 1.
’
' ‘v
'
Thebooster pump 1 is of any approved‘type of
centrifugal pump adapted for the service, an'diini
cludes an impeller (not shown) ' which'is'driven
head on the hydraulic turbine and the water level {II} by
the ‘driving shaft l4. Thedrivinglfshaft l-lii's
in the source of cooling water supply.
2,404,821
3
.
connected by means of a coupling l5 to the driven '
‘ shaft l6 of a hydraulic turbine I'L'so that the
booster pump ‘1 willi be driven by the hydraulic
water channel l9, into which the turbine i1 dis
charges This places these elements of‘ the power
,
cooling water, the cooling water ?ows into the
pipe 3 and thus into thecontrol well 2!), ?lling
turbine H.
The primary pump 5 is driven by an electric
‘motor or other- suitable prime mover, as indicated
at i8, and both this prime mover l8 and the con
denser l are placed at relatively high elevations
' above the water channel 4 and the discharge.
4’
denser I. When the line to the condenser l’ is
?lled, and'the condenser itself is ?lled with the
the control well o-rpenstock 23 to a point or level
at which. the gates 22 of the turbine I ‘l are opened
by ?oat mechanism 25 and with'valve 28 open
the turbine I‘! will operate.
)
This causes the
'-pump 1 to generate additional pressure in the
pipe 8 which will close check valve IQ, causing'
plant (not shown) either above a high water. level‘ ' ‘ '
‘in geographical locations where-?oodlcohdi-tionsi '?
the discharge of the pump 5 to ?ow into the
pump ‘i and add to the total head pro
inlet of
duced.'
’
"
‘
v{are met with, or permits locations‘ of ‘these ele: - ‘
p-Ther point‘ of'ulti'm'ate capacity is reached when.
' 1ments on ablu?’ or elevation abovethewater sup-H is thejquantity'and head produced by the pump 5
‘ply, when conditions are such as to make this ', plus, that produced. by the ‘booster pump 1 over
"type of installation practical and desirable.
The primary pump 5 may be of any approved
comes ‘the, frictional losses in the system plus
the head required by the hydraulic turbine ll.
type of construction of water circulating pump" Rise, in ‘the level of water in the source of supply
having a head capacity characteristic of sui?cient 20 (not shown) will decrease the head available on
rise to. circulate some water-throughthe circulat
ing" system- and condenser upon starting of. the
‘apparatus and before the secondary or. booster
pump 1 comesinto operation.
The driver may
theturbine..,l'l,b_ut. increase'the discharge. pres- ‘
sure or the pump 5 by a like. amount. Thisaction
continues until the head .on the turbine H has
reduced‘ sufjciently to- make it .unable. to pass
beofzconstant- or variable speed type, depending 25 the full quantity of water available even with
upon conditions of service to be met.
‘
the gates 22 wide open. Under such conditions
some of the water-will be forced to spill at the
The secondary or'booster pump ‘I is of any ap
provedxtype- of centrifugal pump having’ the nec
essary andv desired characteristics for performing
Whenthe levelof. water'vin. the sourceof sup
its particular duties, and it has the same capac 30 plyhas risen to a point where the turbine power
ity: in‘ gallons ‘per minute as theprimary pump 5,
isl insu?icient to drive. the. booster pump‘! .fast
its function being to boost the total dynamic head
enough to. develop any head-the turbine ‘H is cut
v to that required by the water circulating system.
out of thesystem during the. circulation of. cool
Thefhydraulic turbine I1 is driven by thewater
ing, water .through the. ‘system, the auxiliary out;
inthee circulating system after it leaves the con 35 let 26 is opened, causingthe water levelin the
denser .i. The outlet pipe3v of they con-denser I
well 28. to fall‘ by allowing the water. to flow out
discharges into a control well or penstock 26,
of the control well into theweir b05129; At such
which latter has a pipe 2i connected to its low
times, the weir box may be utilized to determine
1 ermost portion. The pipe 21 delivers the circulat
the.disc_harge capacity of the motor driven pri
40
ing water‘ tov the inletofthe hydraulic turbine
mary pump 5.
'.
'
<
.
l1, and the operation of the hydraulic turbine
While in. the drawing, and in the foregoing
‘I1 is controlled by means of the adjustable inlet
description the. primarypump 5 and. the booster
gates 22, which areof'the usual'type of construc
pump 7 are shown as connected in series, it is to
weir-29.
" tion employed in hydraulic turbines.
,
,
.
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,
.
be understood that the present invention. may also
45 be employedina system having the primary and
i The gates 22 areadjusted or shifted by a shift
ing: rod 23, ‘which is in turn .connected'by suit
‘ booster pumps connected. in parallel, such. as is
‘ ‘able linkage, as indicated at‘ 24, with a float
shown in Figure 2 of our companion application,
mechanism 25. The ?oat mechanism 25 is po
‘?led August 19, 1941, Serial No. 407,446, with
sitionedin. the controlwell 26, and rises or falls
out departing from the spirtol. the present in
with: variation of the water level in the control 60 vention.
well,'»thereby controlling the position of the inlet
It will be understood that the invention is not
. gates 22 of the hydraulic turbine I‘! in accord
' to be. limited to the speci?c. construction or are
ance vwith. variations in the quantity of waterv
‘ rangement. oi parts shown, but that they may be
within» the control well 20.
‘
‘I The controlwell or penstock 2il'has an auxiliary v
outlet 26'therein located at a predetermined po- ‘
widely modi?ed within the invention de?ned by
the. claims.
What is claimed is:
,
r
-
r
s‘itionv above the bottom of the well. The aux;
1. In. a power plant, the combination with a
iliary outlet 26 is normally closed by a sluice
source of cooling water supply, of asurface con
gate or other suitable type of valve, as indicated
denser, a circuit for cooling water for. said con
at 2-1. The sluice gate or valve 21 is opened when (60 densena primary pump in said circuit, a second
the hydraulic turbine I‘! is cut out of the circulat
ary pump in said circuit and having its inlet
ing system, either through the closing of the
valves Hand 12', or by the closing of the valve
28, which is positioned in the pipe 2| ‘between
the control well or penstock ‘20' and the turbine
inlet. When the sluice gate 21' is open, the water
flows from. the control. well 20 into a weir box
29', from which the water over?ows to any suit
able point of disposal. The weir 29. serves to
maintain a- minimum water level for sealing pur
F poses in the control.‘ well or penstock 29.
7
;When starting up the circulating system, th
valves II; and I2 are preferably closed, and the
primary pump 5 assumes the responsibility or
duty of supplying the cooling water to the con
‘connected to the discharge of the primary pump,
a turbine in said circuit driven. by water ?owing
away from the condenser, said secondary pump
connected to said turbine for operation thereby,
and means for controlling the total static head.
onthe inlet of said hydraulic-turbine under vari-v
ations in the water level in said source of supply.
2. In a power plant, the combination with a
source of cooling water supply, of‘ a surface con
densena circuit for cooling water for said Can
denser, a primary pump in said circuit, a sec
ondary pump in said circuit, a turbine inv said
circuit driven by water ?owing away from the
'ggcondenser, said secondary pump being connected
2,404,321
5
6
,
trol well'in the line between the outlet of the
condenser and the inlet of the turbine'to main
tain the static head on the inlet of the turbine
approximately constant under variations in the
water level in said source ofrsupply.
‘ - '
3. In a power plant, the‘ combination with a
source of cooling water supply, of a surface con
denser, a circuit for cooling water for said con
denser, a primary pump in said circuit, a sec 10
ondary pump in said circuit, a hydraulic turbine
in said circuit driven by water ?owing away
from the condenser, said secondary pump being
ing water to 'said'condense'r, and‘ means for dis
charging cooling water from said circuit at a
point between the condenser and said turbine
the circuit sealed with respect to the atmosphere
a valved by-pass in said circuit constructed and 15
cut out of the circulating systems, means for
maintainingthe static head on the inlet of said
said condenser, means for cutting 'saidiseco'ndary
pump‘ and said turbine out of said circuit to
cause said primary pump-alone to circulate cool‘-‘
and so constructed and arranged as to maintain
connected to said turbine for operation thereby, I
arranged to permit said hydraulic turbine to be
.
inr'saidcircuit for circulating cooling water to
said condenser, a secondary pump having animé
peller in s'aid'circuit, a- turbine in‘ said-‘circuit
operatively connected with said s'econdary‘pump
and driven by water ?owing from said condenser
to aidisaid 'primary'pump in circulating water‘to
to saidturbine-for operation thereby, and‘ ‘alcon'i
at the point of discharge.
‘
I
8. Ina power plant, the combination with a
surface condenser, of a circuit for cooling water
for said condenser, a primary pump including an
impellerin said circuit for circulating cooling
turbine approximately constant‘under variations
water to said condenser, a secondary pump hav
in the water level in the source of supply, and 20 ing an impeller in said circuit and having its
means for rendering said static head maintaining
means ineffective when said turbine is cut out
inlet connected with the discharge of said pri
mary pump, a turbine in said circuit operatively
connected with said secondary pump and driven
of the circulating system.
4. In a power plant, the combination with a
by water ?owing from said condenser to aid said
source of supply of cooling water, of a surface 25 primary pump in circulating water to said con
condenser, a circuit for cooling water for said
denser, and a valved by-pass for cutting said sec
condenser, a primary pump in said circuit, a sec
ondary pump out of said circuit. ,
ondary pump in said circuit, a hydraulic turbine
9. In a power plant, the combination with a
in said circuit driven by water ?owing away from
surface condenser, of a circuit for cooling water
30
the condenser, said secondary pump being con
for said condenser, a primary pump including an
nected to said turbine for operation thereby, a
impeller in said circuit for circulating cooling
valved by-pass in said circuit constructed and
water to said condenser, a secondary pump hav
arranged to permit said hydraulic turbine to be
ing an impeller in said circuit and having its in
cut out of the circulating system, a control well
let connected with the discharge of said primary
in the line between the outlet of the condenser 35 pump, a turbine in said circuit operatively con
and the inlet of the turbine, means actuated by
nected with saidsecondary pump and driven by
the level of water in said well to control the static
water ?owing from said condenser to aid said
head on the inlet of the turbine under variations
primary pump in circulating water to said con
in the water level in said supply source, and
denser, and a valved by-pass for cutting said tur
40
means for lowering the water level in said control
bine out of said circuit.
well to a level ineffective to control the static
10. In a power plant, the combination with a
head on the turbine.
surface condenser, of a circuit ior cooling water
5, In’ a power plant, the combination with a
for said condenser, a primary pump including an
source of supply of cooling water, of a surface
impeller
in said circuit 'for circulating cooling
condenser, a circuit for cooling vWater for said 45 water to said condenser, a secondary pump hav
condenser, a primary pump in said circuit, a
ing an'impeller in said circuit and having its
secondary pump in said circuit, a turbine in said
inlet connected with the discharge of said pri
circuit driven by water ?owing away from the
mary pump, a turbine in said circuit opera
condenser, said secondary pump being connected
tively connected with said secondary pump and
, to said turbine for operation thereby, a control 50
well in the line between the outlet of the con
denser and the inlet of the turbine, said turbine
embodying inlet control gates, and means oper
ated by variation in the water lever in the control
well for operating said gates.
6. In a power plant, the combination with a
supply source of cooling water, of asurface con
denser, a circuit for cooling water for said con
denser, a primary pump in said circuit, a sec
55
driven by water ?owing from said condenser to
aid said primary pump in circulating Water to
said condenser, and a valved by-pass for cutting
said secondary pump and the turbine out of said
circuit.
-
k 11. In a power plant, the combination with a
surface condenser, of a circuit for cooling water
for said condenser, a primary pump including an
impeller in said circuit for circulating cooling
water to said condenser, a secondary pump hav
ondary pump in said circuit, a hydraulic turbine 60 ing an impeller in said circuit, a turbine in said
in said circuit drven by water ?owing away from
circuit operatively connected with said secondary
the condenser, said secondary pump being con
pump and drven by water ?owing from said con
nected to said turbine for operation thereby, a
denser to aid the primary pump in circulating
valved by-pass in said circuit constructed and
to said condenser, said turbine having in
arranged to permit said hydraulic turbine to be 65 water
let
control
gates, a well interposed in said cir
cut out of the circulating system, a control well
cuit on the discharge side of said condenser, and ._
in the line between the outlet of the condenser
means responsive to variations in the level of
and the inlet of the turbine, means for lowering
cooling water in said Well for adjusting said gates
the Water level in said control well, said turbine
embodying inlet control gates‘, and means oper 70 in accordance with the level of the cooling water
in the well,
ated by variation in the water level in the con
12. In a power plant, the combination with a
surface condenser, of a circuit for cooling water
'7. In a power plant, the combination with a
from said condenser, a primary pump including
condenser‘, of a circuit for cooling water for said
condenser, a primary pump including an impeller 75 an impeller in said circuit for circulating cool
trol well for operating said gates.
7
2,104,321
. I’
ing water to said‘ condenser, a secondary pump
having, an ‘impeller in said circuits, turbine in‘
rising,’ and lowering levels, respectively, of the
said circuit operatlvely connected with said sec‘-v
cooling Water in the well, said Well being provided
ondary pump and driven by water ?owing from
said condenser to aid the, primary pump in cir-‘
culating Water to said, condenser, said, turbine
having inlet control gates,‘ at well interposed in
with a cooling water "discharge so constructed
and arranged as tomaintainthe circuit'sealed
with respect to the atmosphere regardless: of, the
cooling water level in the well. _
said circuit on the discharge’side of said con
denser,
the
leveland
of cooling
means water
responsive
in saidto well
variations
for open-‘
8
mg and closing said‘: gates in accordance-with
-
FRANK D. SHUMATE.
H)
GEORGE W. SAATHOFF.
-_
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