Design calculation sheet Project no.:
Date:
Sheet No.:
3
1 of
Computed by:
Subject:
Sump Pump Calculation
Checked by:
Building:
P Pa arking
Approed by:
Determining Sump Pump Flow Rate Assumptions: 1! "ain#ater coming from ramp$ i$ totally remoed by trenche$ %! Sprinkler di$charge i$ the only $ource of #ater Fire Data: Parking &ype of 'a(ard
)rdinary group *
Sprinkler protection Area /ft %0
1+,
Area of $prinkler )peration /ft%0
1-,,
Den$ity /gpm8ft%0
,.1-
lo# from Sprinkler$ /gpm0
%%-
Flow rate Analysis %,%-,
or a 6, min operation of the fire pump the total flo# from $prinkler$ i$
al
2
34-5- liter$
Adopting a flo# of %%- gpm or 14.19 l/s for l/s for a $ump pump mean$ that: 1. All $prinkler$ are actiated #ithin 1-,, ft % %. &he $ump pump #ill remoe all the #ater di$hcarged in$tantaneou$ly in 6, min *f the total amount of %,%-, gal are to be remoed in + hour$ the pump flo# rate #ould be
7.1
l/s
*f the total amount of %,%-, gal are to be remoed in 5 hour$ the pump flo# rate #ould be
5.3
l/s
&he number of $prinkler in the operating area #ill be
11.-5
$ay
1%
Depending on the layout thi$ number could be up to 15 or a total flo# rate of %%- gpm the indiidual $prinkler flo# rate i$ 19.3- gpm A$$uming + $prinkler$ are fir$t actiated the total di$charge flo# i$ -4.%- gpm o r 3.55 l/s &rench Data :
&rench Aerage 'eight /m0
,.1-
7ength of trench $ering one pit /m0 ;olume of #ater in trenche$ /m +0
54.3-
Pump flo# rate to remoe #ater in trenche$ in 1- min
7.5 7. 5 l/ l/s s
Pump flo# rate to remoe #ater in trenche$ in +, min
3.75 3. 75 l/ l/s s
Ba$ed on the aboe three $ignificant flo# rate figure$ are $imulated in the &able belo#
Pump flo# rate /l8$0 &otal #ater remoal duration /min0 < Parking area $ered by one pit /m%0 =a> olume of #ater in parking /liter$0 ;olume remoed by $ump pump /liter$0
15
15
15
3
3
3
4
4
4
+,
4,
6,
+,
4,
6,
30
60
90
%+,,
%+,,
%+,,
%+,,
%+,,
%+,,
2300
2300
2300
34-5-
34-5-
34-5-
34-5-
34-5-
34-5-
76545
76545
76545
%-%,,
-,5,,
3-4,,
1%4,,
%-%,,
+39,,
7200
14400
21600
;olume of #ter in trenche$ /liter$0 "emainig ;olume of #ater on floor /7iter$0
43-,
43-,
43-,
43-,
43-,
43-,
6750
6750
6750
55-6-
16+6-
!-9,-
-316-
55-6-
+166-
62595
55395
48195
'eight of #ater on floor of parking /cm0
1.65
,.95
!,.%-
%.56
1.65
1.+6
2.72
2.41
2.10
PRC-EN-04 (F1) Rev1
Design calculation sheet Project no.:
Sheet No.:
% of
3
Computed by:
Subject:
Sump Pump Calculation
Checked by:
Building:
Parking
Approed by:
Pump Flow Rate De$ign flo# rate of the $ump pump
5 l8$
Selecting Duple> operation of the the $ump pump$ the flo# rate of each one to be $elected i$ %l8$ &hu$ #hen #ater reach a high leel in the pit the $econd pump operate and the total flo# rate #ould be 5 l8$
Minimum Required Sump Volume:
V req
=
Where:
T min Q 4
,req
is the required sump volume between the start level and stop level of the pump
!min
is the minimum pump cycle time
Q
is the pump flow rate
!min
600 seconds
!min
0 min
Q
!he total " of starts # stops $ hour is 6
% l$sec
Vreq
300 Liters
OR
0.3 m3
!"e !otal #olume $or t"e sump wit" 2 pumps
,tot - ,req . )n/* &' х S
,tot
!otal sump volume between the start level and stop level of the pump
n
total number of pumps
&'
!he constatnt hei(ht between the start up of two pumps )in meters*
S
Surface area of the sump )in sq meters*
n
&' S
Vtot
% 0+% m m%
0.5 m3
!"e !otal #olume $or t"e sump wit" 2 pumps wit" %y%li% alternation
,tot - ,req$n . )n/* &' S n
&' S
Vtot
% 0+% m m% 0.35 m3
!"e pit is &esi'ne& to "a(e a sump (olume o$ 0.5 m 3
PRC-EN-04 (F1) Rev1
Design calculation sheet Project no.:
Date:
Sheet No.:
+ of
3
Computed by:
Subject:
Sump Pump Calculation
Checked by:
Building:
Parking
Approed by:
Pump ead !al"ulation
Static
1+0
m
1+0
m
2orce ain Pipe 4un
30
m
3+0
m
#$ %t&'000 %t %ri"tion loss %or a ( )) pipe*
2orce ain Pipe 4un
10
m
%+3
m
#'( %t&'000 %t %ri"tion loss %or a 3 )) pipe*
4esidual
+0
m
!otal 'ead
5+0
m
Safety
5+5
m
Pump +ead
'0 m
Pump Flow
, l&s
otes: / 7n pumpin( stations do not use % $%8 on the dischar(e of waste9 use 38 pipe
PRC-EN-04 (F1) Rev1
PRC-EN-04 (F1) Rev1
