Checked Pressure Drop Spreadsheet Sams

8/8/2019 Checked Pressure Drop Spreadsheet Sams

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REYNODLS NUMBER

D : internal diameter (ft)

:mean velocity of flow (ft/sec)

:weight density of fluid(lb/ft^3)

:absolute viscosity(lbm/ft*s)

INPUT FOR REYNOLDS NUMBER

D 0.17 ft

0.84 ft/sec

67.39 lb/ft^3

0.01 (lbm/ft*s)

1439.09

EQUIVALENT LENGTH OF PIPE FITTINGS (pg 154)

FITTING (L/D) ENTER NUMBER

GATE VALVE 6.5 1

GLOBE VALVE 330 1

STANDARD 90 ELBOW 30 2

45 ELBOW 15 1



(NOTE:USE ACTUAL INDSIDE DIAMETER EX

EXTRA:Diameter

D

Inches: 2.07

feet: 0.17

A: Cross Sectional Are 0.02

67.39

92.18

PIPEADD Equivalent L (ft) To DARCY EQUATION Nominal pipe size

1.12 1

56.84 \ 1 1/2

10.34 2

2.58 2 1/2

3

3 1/2

4

56



: WANT 2in STEEL PIPE, NOMINAL DIAMETER 2.0 ACTUAL INSIDE DIAMETER 2.067)

EXTRA:Mean Velocity EXTRA: Co

:Rate of flow (ft^3/s)

:Cross Sectional Area

(ft^2) 0.02 (ft^3/s) WATER STP:0.02 (ft^2)

0.84 (ft/s)

ft/sec: 0.84

ATA-CARBON AND ALLOY STEEL-STAINLESS STEELOutside DiameteSchedual Wall Thicknes Inside Diameter(in)

1.32 40 0.33 1.05

1.9 40 0.15 1.61 <<<< USE

2.38 40 0.15 2.07

2.88 40 0.2 2.47

3.5 40 0.22 3.07

4 40 0.23 3.55

4.5 40 0.24 4.03

5.56 40 0.26 5.056.63 40 0.28 6.07



version of cp to lbm/ft*s EXTRA: How fast It takes to fill tank

0 Note: 1 M^3= 35.4 ft^3

10.12 cP

0.01 lbm/ft*s Volume of tank: 7 ft^3

Tank fill time: 356.58 s

62.4 lbm/ft^3 Tank fill time: 5.94min

3 hours

70.67

1.18 ft^3/min 8.81

0.02

20 minutes

3.53ft^3/min

0.06ft^3/sec

PUMP CAPACITY 16 L/min

0.57ft^3/min

ELLOW FOR D 0.01 ft^3/sec



EXTRA: PERSPECTIVE ON VOLUMES

input gallons 50

1ft^3 = 28.31 L

1ft^3 = 7.48 gallons

1 M^3 = 35.4 ft^3

1M^3 = 1000 L

1M^3 = 264 gallons

1ft^3 = 6.68 ft^3

1 M^3 = 0.19 M^3

1 L = 189.25L

1ft^3 = 0.11 ft^3/sec

1 M^3 = 0 M^3/sec

1 L = 3.15 L



DARCYS LAW:(lbs/in^2)

:Darcy friction factor

:Length of the pipe (ft)

:Internal diameter (ft)

:Mean velocity of flow (ft/sec):gravitational acceleration (32.174 ft/s^2)

:weight density of fluid(lb/ft^3)

FRICTION FACTOR

Re<2000 flow is considered Laminar

2000<Re<400flow is in critical zone region (Can be either Laminar or turbulent)

Re>4000 flow is Turbulent



FRICTION FACTOR FOR FLOWS ( Re<2000) NOTE: When the flow is laminar, it is a f

Poiseuille's law

:Pressure drop (lbs/in^2)

:internal diameter (in) <<<Same as D just in inch not ft

:absolute (dynamic) viscosity cP:Length of the pipe (ft)

:mean velocity of flow (ft/sec)

2.07 in

10.12 cP

221 ft

0.84 fps

0.29 psi

0.68 ft H2O2031.69Pa

0.02 atm

0.02 Bar



nction of the Reynolds number only



FRICTION FACTOR FOR FLOWS ( Re>4000) Table:3.2 Effective Surf

Surface є(ft)

Ways to Find f: Cast Iron 0

1) Moody chart Galvanized Iron: 0

2) Colebrook Equation Commercial Steel 0

Drawn Tubing: 0

Serghide Approximation of Colebrook equation

0 (ft) 0

0.17 (ft) 0

1439.09<<< From REYNOLDS Sheet

A: 4.16

B: 4.28

C: 4.25

0.06



ce Roughnesses (pg 136)

DARCYS LAW:(lbs/in^2)

f :Darcy friction factor

L :Length of the pipe (ft)

D :Internal diameter (ft)

v :Mean velocity of flow (ft/sec)

g :gravitational acceleration (32.174 ft/s^2)

L 321 67.3 (lbs/ft^3)

D 0.17

v 0.84

g 32.17 <<<Constant dosent change

0.53 psi

1.22 ft H2O

3657.26Pa0.04 atm

Checked Pressure Drop Spreadsheet Sams

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