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Chemical Dose Controller Design Program

This program will code for a general dose controller design and will incorporate the design into the Automated Design Tool. The doser design will be for a triple scale (three different orifices). See the CDC research team page for a more detailed explanation of this.


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Figure 1: Doser Overview (CDC 2009-2010)



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Figure 2: Doser Draft Design (CDC 2009-2010)

Design Process:

Expert Inputs:
HL.ChemDoserMin

User Inputs:
Q.Plant (HL.Plant)

Design Assumptions:
C.DoserScaleAlumMax

Code Calculations:
Constant head tank orifice size
Dosing tubes size to ensure orifice head loss is much greater than major loss in tubing

Equations:

Orifice Equation:

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\large $$ Q = K_

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A_

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\sqrt

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$$

Where,

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\large$$ Q = Flow Rate $$

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\large$$ h = Head Loss $$

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\large$$A_

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= Area of the Orifice $$

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\large$$K_

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= Orifice Constant $$

Orifice Head Loss:

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$$
h_

Unknown macro: {1Orifice}

= K_

Unknown macro: {DoseOrifice}

{{V_

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^2 } \over {2g}}
$$

Major Head Loss:

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$$
h_

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= f {L\over {D}}V^2} \over {2g
$$

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