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Blower power calculation

Power calculation

 • Blower

    - Power

    - Types /efficiency

 • Pump

 • Motor

 • Power cost

 

iMBR

 • Case example

     - Liquid pumping

     - Aeration

     - SED breakdown

 • SED in literature

 • SAD in literature

 • Oxygen balance

 • Energy optimization

 • OPEX

 • CAPEX

 

sMBR

 • Optimization issue

 • Flux determining factor

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Reference

 

 

 

 

   Blowers can be categorized as either (1) positive displacement blowers, which provide a

constant volume of air at a wide range of discharge pressures, or (2) centrifugal blowers, which provide a wide range of flow rates over a narrow range of discharge pressure (USEPA, 2010). Table 1 summarizes the types of blowers in each category and provides information on operation, air flow rates, advantages, and disadvantages

 

   The efficiency of blower varies depending on the type of blower and the condition it is used, but the approximate ranges are listed in Table 2.

 

   The power consumption of blower can be calculated using equation (1), which is derived from adiabatic compression equation (modified from Burton, 2002).

               

Metric unit - For volumetric air flow

            

                   ------------------- (1)

 

       : Motor efficiency ( - )

       : Blower efficiency ( - )

        : Inlet pressure, absolute ( kPa )

        : Outlet pressure, absolute ( kPa )

       : Power (kW)

     : Air flow in ambient condition (m3/min)

 

British unit - For volumetric air flow 

                   ------------------- (2)

 

       : Motor efficiency ( - )

       : Blower efficiency ( - )

        : Inlet pressure, absolute ( psia )

        : Outlet pressure, absolute ( psia )

       : Power (hp)

     : Air flow in ambient condition (CFM, ft3/min)

 

 Metric unit - For mass flow

 

                   ------------------- (3)

  

       : Motor efficiency ( - )

       : Blower efficiency ( - )

        : Inlet pressure, absolute ( kPa )

        : Outlet pressure, absolute ( kPa )

       : Power (kW)

        : Gas constant ( 8.314 J/mol/K )

        : Ambient temperature ( K )

       : Air flow ( kg/s )

 

British nit - For mass flow

 

                   ------------------- (4)

 

       : Motor efficiency ( - )

       : Blower efficiency ( - )

        : Inlet pressure, absolute ( psia )

        : Outlet pressure, absolute ( psia )

       : Power (hp)

        : Gas constant (53.3 ft.lb/(lb air)/oR)

        : Ambient temperature ( oR )

       : Air flow ( lb/s )

 

Calculator (put numbers in the white boxes)

             

   

 

 

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