of 28
8/14/2019 Calc Example (Imper) HOT WATER
1/57
Table 1 Friction loss for all pipe segments.
SECTION
L1 500 6 5.68
L2 500 6 5.68
L3 500 6 5.68
L4 500 6 5.68
L5 500 4 12.77
L6 400 4 10.22
- - -
L7 400 4 10.22
- - -
Table 2. Friction loss for fittings.
SECTION FLOW (Usgal/min) TYPE QTY
L1 500 Entrance 1
L1 500 Butterfly 1
L2 500 Butterfly 1
L3 500 Butterfly 2
L3 500 Elbows 2
L4 500 Elbows 5
L4 500 Butterfly 1
L5 500 Elbows 4L5 500 Tee 1
L6 400 Elbows 3
- - -
L7 400 Pipe exit 1
- - -
Table 3. Friction loss of the equipment.
FLOW(Usgal/min)
DIA(in)
VELOCITY(ft/s)
Sub-total HFP1-7
Total HFP1-2
Sub-total HFF1-7
Total HFF1-2
8/14/2019 Calc Example (Imper) HOT WATER
2/57
Note: p control valve = 10 ft fluid
SECTION FLOW (Usgal/min) TYPE QTY
L2 500 Filter 1
L3 500 1
L7 400 1
Table 4. Pressure head loss due to the check valve
TYPE FLOW (Usgal/min) QTY DIA (in)
Tilting disc 500 1 6
Total static head
2803 2841 38.00
Velocity head difference between the outlet and inlet of the system
0 0 0.00 0.00
Tank pressure head difference between the outlet and inlet of the system
H1 H2 H2 H1 (ft fluid)
0 0 0.00
Table 5. Summary of the calculation results of the total head.
Component Sign (ft fluid) Results
Pipe friction head loss + 16.78
Heatexchanger
Controlvalve
TotalH
EQ1-2
z1
z2
z2-z
1(ft fluid)
v1
v2
v12/2g v
22/2g
HFP1-2
8/14/2019 Calc Example (Imper) HOT WATER
3/57
Fittings friction head loss + 12.18
Equipment friction head l + 28.86
Check valve head loss + 1.69
Total static head + 38.00
Velocity head difference + 0.00
Tank pressure head differ + 0.00
Total head (ft fluid) = 97.52
Table 6 Power to the pump shaft calculation results
0.98 97.52 500 0.71
Table 7 Summary of the pump data.
Pump Manufacturer Goulds
Pump Model 3175 3X6-12
Type End suction, direct drive
Suction dia. (in) 6
Discharge dia. (in) 3
Impeller speed (rpm) 1750
Operating head (ft) 97.3
Operating Flow (Usgpm) 500
Pump efficiency (%) 71.3
Predicted efficiency (%) 77
Specific speed
Suction specific speed
Temperature rise (F)
Fluid type Water
Viscosity (cSt) 1.1
Temperature (F) 150
Specific gravity 0.98
Specific heat (Btu/lb-F) 1
Brake horsepower (hp) 16.9
Selected horsepower (hp) 20
Frame 256 T
Pump shut-off head (ft) 122
52
NPSH required (ft abs.) 6NPSH available (ft abs.) 15.3
Max. impeller size (in) 12
HFF1-2
HEQ1-2
HCHECK
z2
z1
v22/2g v
12/2g
H1
H2
HP
SPECIFICGRAVITYSG
TOTALHEADH
P(ft fluid)
FLOWq(Usgal/min)
PUMPEFFICIENCY
System high point (ft) zhigh
8/14/2019 Calc Example (Imper) HOT WATER
4/57
Min. impeller size (in) 9
Selected impeller size (in) 10.7
Calculate the N.P.S.H. available and check against the N.P.S.H. required
Table 8 Pressure head loss due to pipe friction
SECTION
L1 500 6 5.68
L2 500 6 5.68
- - -
Table 9 Pressure head loss due to fittings friction
SECTION FLOW (Usgal/min) TYPE QTY
L1 500 Entrance 1L1 500 Butterfly 1
L2 500 Butterfly 1
- - -
Table 10 Pressure head loss due to equipment
SECTION FLOW (Usgal/min) TYPE QTY
L2 500 Filter 1
Suction static head
2803 2802 1.00
N.P.S.H.avail.
( ft fluid ab.s ) = HS
+ HA
Hva
HS
= -(HF1-S
+HEQ-S
) + v1
2/2g + (z1-z
s+ H
1)
N.P.S.H.avail.( ft fluid abs ) = -(HFP1-S
+ HFF1-S
+HFEQ1-S
) + v1
2/2g + (z1-z
s+ H
1) +
FLOW
(Usgal/min)
DIA
(in)
VELOCITY
(ft/s)
Total HFP1-S
Total HFF1-S
TotalH
EQ1-2
z1
zS
z1-z
S(ft fluid)
8/14/2019 Calc Example (Imper) HOT WATER
5/57
Tank pressure head at the inlet of the system
0
Velocity head at the inlet of the system
0 0.00
Atmospheric pressure head
SG
13.3 0.98 31.35
Vapor pressure head
SG
3.6 0.98 8.49
Table 11. Summary of the calculation results of the N.P.S.H. available.
Component Sign (ft fluid) Results
Pipe friction head loss - 0.10
Fittings friction head loss - 1.50
Equipment friction head l - 7.07
Suction static head + 1.00
Tank pressure head + 0
Velocity head + 0.00
Atmospheric pressure hea+ 31.35
Vapor pressure head - 8.49
= NPSH 15.19
Calculate the pressure ahead of the control valve using method 1
H1
(ft fluid)
v1
v12/2g (ft fluid)
pA(psia) H
A(ft fluid abs.)
pva
(psia) Hva
(ft fluid abs.)
HFP1-S
HFF1-S
HEQ1-S
z1-z
S
H1
v12/2g
HA
Hva
NPSHavail.
(ft fluid abs.)
HX = HP -(HFP1-X + HFF1-X + HFEQ1-X) + 1/2g (v12- vX2 )+ (z1 + H1 +zx )
H7
= HP
-(HFP1-7
+ HFF1-7
+ HFEQ1-7
) + 1/2g (v1
2- v7
2 )+ (z1+ H
1+
z
7)
8/14/2019 Calc Example (Imper) HOT WATER
6/57
Table 12 Pressure head loss due to pipe friction
SECTION
L1 500 6 5.68
L2 500 6 5.68
L3 500 6 5.68
L4 500 6 5.68
L5 500 4 12.77
L6 400 4 10.22
- - -
Table 13. Pressure head loss due to fittings friction
SECTION FLOW (Usgal/min) TYPE QTYL1 500 Entrance 1
L1 500 Butterfly 1
L2 500 Butterfly 1
L3 500 Butterfly 2
L3 500 Elbows 2
L4 500 Elbows 5
L4 500 Butterfly 1
L5 500 Elbows 4
L5 500 Tee 1
L6 400 Elbows 3
- - -
Table 14. Pressure head loss due to equipment
Note: p control valve = 10 ft fluid
SECTION FLOW (Usgal/min) TYPE QTY
L2 500 Filter 1
L3 500 1
Table 15. Pressure head loss due to the check valve
TYPE FLOW (Usgal/min) QTY DIA (in) Tilting disc 500 1 6
FLOW(Usgal/min)
DIA(in)
VELOCITY(ft/s)
Sub-total HFP1-7
Sub-total HFF1-7
Heatexchanger
TotalH
EQ1-7
8/14/2019 Calc Example (Imper) HOT WATER
7/57
Static head
2803 2846 -43.00
Velocity head difference between points 1 and 7
0 10.22 0.00 1.62
Tank pressure head at the inlet of the system
0
Table 16 Summary of the results of the pressure calculation at point 7.
Component Sign (ft fluid) Results
Total head + 9
Pipe friction head loss - 16.27
Fittings friction head loss - 10.56
Equipment friction head l - 18.86
Check valve head loss - 1.69
Total static head + -43.00Velocity head difference + v2 1/2g v7 2/2g -1.62
Tank pressure head + 0
= 5.51
= 2.34
Metod 2
Table 17 Pressure head loss due to pipe friction
SECTION
L7 400 4 10.22
- - -
z1
z7
z1-z
7(ft fluid)
v1
v7
v12/2g v
72/2g
H1
(ft fluid)
HP
HFP1-7
HFF1-7
HEQ1-7
HCHECK
z1 z7
H1
Pressure headat the control valve (ft
H7
Pressureat the control valve (psig)
p7
H7
= HFP7-2
+ HFF7-2
+ HFEQ7-2
+ 1/2g (v2
2- v7
2 ) + (z2+ H
2-z
7)
FLOW(Usgal/min)
DIA(in)
VELOCITY(ft/s)
Total HFP7-2
8/14/2019 Calc Example (Imper) HOT WATER
8/57
Table 18. Pressure head loss due to fittings friction
SECTION FLOW (Usgal/min) TYPE QTY
L7 400 Pipe exit 1
- - -
Table 19. Pressure head loss due to equipment
Note: p control valve = 10 ft fluid
SECTION FLOW (Usgal/min) TYPE QTY
L7 400 1
Total static head
2846 2841 -5.00
Velocity head difference between points 7 and 2
10.21 0 1.62 0.00
Tank pressure head at the outlet of the system
H2
0
Calculation results (method 2 pressure at the control valve inlet
Table 20 Results of the pressure calculation at point 7.
Component Sign (ft fluid) Results
Pipe friction head loss + 0.51
Fittings friction head loss + 1.62
Equipment friction head l + 10.00
Static head + -5.00
Velocity head difference + -1.62
Tank pressure head differ + 0.00
Total HFF1-2
Controlvalve
TotalH
EQ7-2
z7
z2
z2-z
7(ft fluid)
v7
v2
v72/2g v
22/2g
HFP7-2
HFF7-2
HEQ7-2
z2 z7v
22/2g v
72/2g
H2
8/14/2019 Calc Example (Imper) HOT WATER
9/57
= 5.51
= 2.34
Pressure head at thecontrol valve (ft of fluid)
H7
Pressure at the controlvalve
p7
8/14/2019 Calc Example (Imper) HOT WATER
10/57
1.64 4 0.07
1.64 2 0.03
1.64 24 0.39
1.64 20 0.33
13.1 40 5.24
8.51 120 10.21
- - 16.27
8.51 6 0.51
- - 16.78
DIA (in) VELOCITY (ft/s)v2/2g (ft fluid) K
6 5.68 0.50 1 0.50
6 5.68 0.50 1 0.50
6 5.68 0.50 1 0.50
6 5.68 0.50 1 1.00
6 5.68 0.50 0.28 0.28
6 5.68 0.50 0.28 0.70
6 5.68 0.50 1 0.50
4 12.77 2.53 0.32 3.244 12.77 2.53 0.7 1.77
4 10.22 1.62 0.32 1.56
- - - - 10.56
4 10.22 1.62 1 1.62
- - - - 12.18
HFP
/L
(ft/100 ft pipe)
L(ft)
HFP
(ft fluid)
HFF
(ft fluid) = K x v2(ft/ s)2 / 2g(ft/s)2
HFF
(ft fluid)
8/14/2019 Calc Example (Imper) HOT WATER
11/57
p (psi) SG p (ft fluid)
3 0.98 7.07 7.07
5 0.98 11.79 11.79
4.24 0.98 10.00 10.00
28.86
SG p (psi)
0.98 590 0.72 1.69
0.00
HEQ(ft fluid)
CV (gpm/psi-1/2 Hcheck(ft fluid) http://www.engine
CV = q/ (p/S
v22/2g v
12/2g (ft fluid)
http://www.engineeringtoolbox.com/flow-coefficients-d_277.htmlhttp://www.engineeringtoolbox.com/flow-coefficients-d_277.html8/14/2019 Calc Example (Imper) HOT WATER
12/57
16.92
BRAKEHORSEPOWERP(hp)
http://www.engineeringtoolbox.com/pumps-power-d_505.html
http://www.engineeringtoolbox.com/pumps-power-d_505.htmlhttp://www.engineeringtoolbox.com/pumps-power-d_505.html8/14/2019 Calc Example (Imper) HOT WATER
13/57
1.64 4 0.07
1.64 2 0.03
- - 0.10
DIA (in) VELOCITY (ft/s)v2/2g (ft fluid) K
6 5.68 0.50 1 0.506 5.68 0.50 1 0.50
6 5.68 0.50 1 0.50
- - - - 1.50
p (psi) SG p (ft fluid)
3 0.98 7.07 7.07
7.07
A- H
va
HFP
/L
(ft/100 ft pipe)
L
(ft)
HFP
(ft fluid)
HFF
(ft fluid)
HEQ
(ft fluid)
8/14/2019 Calc Example (Imper) HOT WATER
14/57
N.P.S.H.avail.( ft fluid abs ) = -(HFP1-S
+ HFF1-S
+HFEQ1-S
) + v1
2/2g + (z1-z
s+ H
1) + H
8/14/2019 Calc Example (Imper) HOT WATER
15/57
1.64 4 0.07
1.64 2 0.03
1.64 24 0.39
1.64 20 0.33
13.1 40 5.24
8.51 120 10.21
- - 16.27
DIA (in) VELOCITY (ft/s)v2/2g (ft fluid) K6 5.68 0.50 1 0.50
6 5.68 0.50 1 0.50
6 5.68 0.50 1 0.50
6 5.68 0.50 1 1.00
6 5.68 0.50 0.28 0.28
6 5.68 0.50 0.28 0.70
6 5.68 0.50 1 0.50
4 12.77 2.53 0.32 3.24
4 12.77 2.53 0.7 1.77
4 10.22 1.62 0.32 1.56
- - - - 10.56
p (psi) SG p (ft fluid)
3 0.98 7.07 7.07
5 0.98 11.79 11.79
18.86
SG p (psi)0.98 590 0.72 1.69
HFP
/L
(ft/100 ft pipe)
L(ft)
HFP
(ft fluid)
HFF (ft fluid)
HEQ(ft fluid)
CV (gpm/psi
-1/2
H
check
(ft fluid)
8/14/2019 Calc Example (Imper) HOT WATER
16/57
-1.62
8.51 6 0.51
- - 0.51
v12/2g v
72/2g (ft fluid)
H7
= HP
-(HFP1-7
+ HFF1-7
+ HFEQ1-7
) + 1/2g (v1
2- v7
2 )+ (z1+ H
1+
z
7)
HFP
/L
(ft/100 ft pipe)
L(ft)
HFP
(ft fluid)
8/14/2019 Calc Example (Imper) HOT WATER
17/57
DIA (in) VELOCITY (ft/s)v2/2g (ft fluid) K
4 10.22 1.62 1 1.62
- - - - 1.62
p (psi) SG p (ft fluid)
4.24 0.98 10.00 10.00
10.00
-1.62
HFF7-2
(ft fluid
HEQ7-2
(ft fluid)
v22/2g v
72/2g (ft fluid)
H7
= HFP7-2
+ HFF7-2
+ HFEQ7-2
+ 1/2g (v2
2- v7
2 ) + (z2+ H
2-z
7)
8/14/2019 Calc Example (Imper) HOT WATER
18/57
8/14/2019 Calc Example (Imper) HOT WATER
19/57
Specified Data
C = Hazen-Williams roughness constant 141Stainless
Q = volume flow (gal/min) 500
dh = inside or hydraulic diameter (inches) 6
Calculated Pressure Loss
f = friction head loss in feet of water per 100 feet of pipe (ft H20 per 100 ft pipe) 1.80
Calculated Flow Velocity
v = flow velocity (ft/s) 5.68
g = 32.174 ft/s2
8/14/2019 Calc Example (Imper) HOT WATER
20/57
eringtoolbox.com/flow-coefficients-d_277.html
)1/2
http://www.engineeringtoolbox.com/flow-coefficients-d_277.htmlhttp://www.engineeringtoolbox.com/flow-coefficients-d_277.html8/14/2019 Calc Example (Imper) HOT WATER
21/57
8/14/2019 Calc Example (Imper) HOT WATER
22/57
8/14/2019 Calc Example (Imper) HOT WATER
23/57
A- H
va
8/14/2019 Calc Example (Imper) HOT WATER
24/57
8/14/2019 Calc Example (Imper) HOT WATER
25/57
8/14/2019 Calc Example (Imper) HOT WATER
26/57
8/14/2019 Calc Example (Imper) HOT WATER
27/57
8/14/2019 Calc Example (Imper) HOT WATER
28/57
Pipe Water Loss Calculation for Water
Based on Darcy-Weisbach Kinematic Viscosity (ft2/sec) at 75F
hf=f*L/D*v^2/2g Roughness of StSt Pipe/ Tubing (ft)
Specific Gravity of Fluid
CHECK !!! :Valid for Relative Roughness 10^-6 to 10^-2 and Reynolds Number 5000 to 10^
Pipe Nominal Diameter 6.00
Pipe Length (ft) 4
Pipe Inside Diameter (in) 6.07 OK
Flow Rate (gpm) 500.00 Reynolds Number to low: Res
Kinematic viscosity (ft2/sec) 0 #VALUE!
Roughness (ft) 0 #VALUE!
Total Equivalent Length 4
Relative Roughness #VALUE! dimensionless
Velocity (fps) 5.55
Reynolds Number 0 dimensionless
friction factor #VALUE! dimensionless
friction head loss (ft) 0
8/14/2019 Calc Example (Imper) HOT WATER
29/57
8/14/2019 Calc Example (Imper) HOT WATER
30/57
8/14/2019 Calc Example (Imper) HOT WATER
31/57
8/14/2019 Calc Example (Imper) HOT WATER
32/57
8/14/2019 Calc Example (Imper) HOT WATER
33/57
8/14/2019 Calc Example (Imper) HOT WATER
34/57
8/14/2019 Calc Example (Imper) HOT WATER
35/57
8/14/2019 Calc Example (Imper) HOT WATER
36/57
8/14/2019 Calc Example (Imper) HOT WATER
37/57
0.00001 0
0.00005 0
1.02
lts Invalid - Results Invalid
http://www.engineeringtoolbox.com/dynamic-abso
http://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.htmlhttp://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html8/14/2019 Calc Example (Imper) HOT WATER
38/57
8/14/2019 Calc Example (Imper) HOT WATER
39/57
8/14/2019 Calc Example (Imper) HOT WATER
40/57
8/14/2019 Calc Example (Imper) HOT WATER
41/57
8/14/2019 Calc Example (Imper) HOT WATER
42/57
8/14/2019 Calc Example (Imper) HOT WATER
43/57
8/14/2019 Calc Example (Imper) HOT WATER
44/57
8/14/2019 Calc Example (Imper) HOT WATER
45/57
8/14/2019 Calc Example (Imper) HOT WATER
46/57
8/14/2019 Calc Example (Imper) HOT WATER
47/57
8/14/2019 Calc Example (Imper) HOT WATER
48/57
8/14/2019 Calc Example (Imper) HOT WATER
49/57
8/14/2019 Calc Example (Imper) HOT WATER
50/57
8/14/2019 Calc Example (Imper) HOT WATER
51/57
8/14/2019 Calc Example (Imper) HOT WATER
52/57
8/14/2019 Calc Example (Imper) HOT WATER
53/57
8/14/2019 Calc Example (Imper) HOT WATER
54/57
8/14/2019 Calc Example (Imper) HOT WATER
55/57
Pipe Water Loss Calculation for Water
Based on Darcy-Weisbach Kinematic Viscosity (ft2/sec) at 75F 0
hf=f*L/D*v^2/2g Roughness of StSt Pipe/ Tubing (ft) 0
Specific Gravity of Fluid 1.02
CHECK !!! :Valid for Relative Roughness 10^-6 to 10^-2 and Reynolds Number 5000 to 10^8
Pipe Nominal Diameter 6.00
Pipe Length (ft) 4
Pipe Inside Diameter (in) 6 OK
Flow Rate (gpm) 500.00 OK
Kinematic viscosity (ft2/sec) 0 OK
Roughness (ft) 0 OK
Total Equivalent Length 4
Relative Roughness 0 dimensionless
Velocity (fps) 5.67
Reynolds Number 306236.78dimensionless
friction factor 0.02dimensionless
friction head loss (ft) 0.06
8/14/2019 Calc Example (Imper) HOT WATER
56/57
0.0000093
0 SS
http://www.engineeringtoolbox.com/dynamic-absolute-kin
http://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.htmlhttp://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html8/14/2019 Calc Example (Imper) HOT WATER
57/57
ematic-viscosity-d_412.html
http://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.htmlhttp://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html