Volume Calculation - Drum Formula - Feedwater Tank

To calculate losses in an isolated water/steam cycle it is necessary to calculate the volume change out of the level difference, and then find the mass flow. Most drums, hotwells, feedwater-tanks, deaerator tanks and other tanks have cylindrical shape with ellipsoidal ends.

Drum Level and Volume

The drum tank volume formula is

V = V_{s} + 2 V_{e}

Gleichung 1

V_{s} = L \cdot R^{2} \cdot [α - \sin (α) \cos (α)]

Gleichung 2

2 V_{e} = \frac{A}{R} \cdot \frac{π}{3} \cdot H^{2} \cdot [3 R - H]

Gleichung 3

All are inner dimensions.
R/A are usually 2:1 ellipsoidal ends.
Angle α is needed in rad; α [rad] = α [deg] · π / 180 [deg]

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Axel Ebert

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Strömungsmechanik

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