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Air flow rate and manometer reading


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Air flow rate and manometer reading

  1. 1. Title: AIR FLOW RATE AND MANOMETER READINGBACKGROUND: Manometers: Pressure measuring devices using liquid columns in vertical or inclined tubes are called manometers. One of the most common is the water filled U-tube manometer used to measure pressure difference in pitot or orifices located in the airflow in air handling or ventilation system. h Vertical U-tube manometer: P = pressure difference γ = specific weight of fluid in the tube h = liquid height Inclined U-tube manometer: h 0
  2. 2. θ = angle of column relative to the horizontal planeVolume Flow Rate: Volume flow rate describes the volume of fluid which passes through a given surface per unit time. A = cross sectional area v = velocity of fluid Fluid velocity: P = pressure difference γ = specific weight of airAir flow bench: Schematic diagram of an air flow bench is shown below: OUT Motor Air duct IN Centrifugal fan Manometer
  3. 3. EQUIPMENTS: 1. Hand held anemometer 2. Air flow bench 3. CaliperThe air flow bench:Manometers:
  4. 4. Digital