Method for Determining the Cross-Sectional Area of a Tank of a Pump Station

A method for determining the cross-sectional area [A(H)] of a tank of a pump station within an interspace (Y) of the tank delimited by a pump start liquid level [START] and a pump stop liquid level [STOP], as a function of the height [H] taken from the bottom of the tank, the tank of the pump station being configured for temporary storage of a liquid, wherein the pump station comprises an inlet for influent liquid, an outlet, at least one pump configured for transporting the liquid away from the tank via said outlet, and a liquid level sensor,

• the method comprising the steps of:
• establishing the cross sectional area [A(H-seg)] of the tank sin a sub-segment of the interspace (Y) of the tank, as a function of the height [H] taken from the bottom of the tank,
• operating the pump to transport liquid away from the tank and determining the pumped flow [Q(H-seg)] in the sub-segment of the interspace (Y) of the tank, as a function of the height [H] taken from the bottom of the tank,
• determining the pumped flow [Q(H)] in the interspace (Y) of the tank, as a function of the height [H] taken from the bottom of the tank, based on the determined sub-segment pumped flow [Q(H-seg)],
• operating the pump to transfer liquid away from the tank and by means of the liquid level sensor determining a liquid level change [ΔH(H)] in the interspace (Y) of the tank, as a function of the height [H] taken from the bottom of the tank,
• determining the cross-sectional area [A(H)] of the tank within the interspace (Y) of the tank, as a function of the height [H] taken from the bottom of the tank, by dividing the interspace pumped flow [Q(H)] by the liquid level change [ΔH(H)], [Q(H)/ΔH(H)=A(H)].