# 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.

The drum tank volume formula is

V = V_{s} + 2V_{e} (1)

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

2V_{e} = AR · π3 · H^{2} · [3R - H] (3)

All are inner dimensions.

R/A are usually 2:1 ellipsoidal ends.

Angle [rad] = Angle [deg] · π / 180°

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