1' What you will be doing in this lab

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1. What you will be doing in this lab?

• To Plot Pump Characteristic(capacity) Curve-
  Pressure Head(m) versus Flowrate(m3/s)

Pressure Head (m)
Q Flowrate (m3/s)
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2. What is Pump Pressure Head (m)?

• We have to look at EGL.
• Pump Pressure Head is pressure head difference
  between pressure before water flow into a pump
  (Pin) and water flow out of a pump (Pout).
• Flowrate is rate of water flow thru the pump.
  (Voume / Time)

Pout
Pin
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3. Can the water flow from Tank A to Tank B?

• Below is the scenario of lab equipment.
• Before we start, answer this question Can the
  water flow from tank A to tank B without the
  pump?
• So the pump provide pressure or head to EGL so
  that water can flow from tank A to tank B.

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4. Start the test Single Pump Chacteristic Curve

• Fill tank B with 5 liter of water and time it.
  Use the valve to control flowrate, start with
  full opening of the valve.
• Get the Volume, time, Pin and Pout. This wikl
  give us Pressure Head and Flowrate.
• Volume(5liter)/Time ? Flowrate(liter/sec) ?
  Flowrate(m3/s)
• Pout Pin X Bar ? Pascal ? Pressure Head(m)

Take at least 8 sets of data. Start with Full
until No Flow. Increment between the two.
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5. Collect data in table format.
1 bar 10.2 meter 1 liter/s 0.001 m3/s
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6. Plot the Pump Characteristic Curve.

• The data in the table will be able to produce
  below pump characteristic curve.

Pressure Head (m)
Q Flowrate (m3/s)
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PUMP IN SERIES

• Plot Pump Chacteristic Curve for pump in series.
• Same process as single pipe but Pin is before 1st
  pump in series and and Pout is after 2nd pump in
  the series.

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Pump in Series
Flow Low Head high
Flow High Head low
Pout
Pin
Pump in series
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PUMP IN PARALLEL

• Plot Pump Chacteristic Curve for pump in
  parallel.
• Same process as single pipe but Pin is before 1st
  and 2nd pump in parallel and and Pout is after
  1st and 2nd pump in the parallel.

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Pump in Parallel
Flow Low Head high
Flow High Head low
Pout
Pin
Pump in parallel
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Pump Test Layout
Pressure meter
Pressure meter
P2Pout
P2
pump
Pin
valve
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Open Channel Flowrate Measurement

• In the open channel, we need to measure flowrate.
• To do so, we will use equipment such as weir,
  flume etc. These equipments depend on flowrate
  equation
• The flowrate equation depend on
• Q f(Coefficient, Height, Width or Angle)
• Our test in the lab is to determine the C
  Coefficient of the equipment. Once known, we can
  calculate flowrate for any condition using the
  specific equipment.

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There will be tests 3 weirs and 1 flume.
Rectangular Notch
Sharp Crested Weir
H
H
a 41
B
H
H
Bc ?
B 75
? 900
V-Shape Weir
Venturi Flume