Patent ID: 7239987

Claim:
A system comprising including: a processor, a memory, a display, flow-mechanical input data, a ΔV-pump model, wherein the ΔV-pump model comprises; an upper transforming element (TF 1 ) and a lower transforming element (TF 2 ), each having a flow domain (fd 1 , fd 2 ) and a mechanical domain (md 1 , md 2 ), the upper transforming element is provided with a transforming value A1 and the lower transforming element is provided with a transforming value A1+A2, wherein A1 and A2>0, the upper and lower transforming elements are interconnected such that their mechanical domains are connected, said mechanical domains are provided with a control value representing a measurement arranged to intermittently and simultaneously activate said mechanical domains of the transforming elements and that the flow domains of the upper and lower transforming elements are separated by a first non-return valve element (R1) having a flow domain of the upper transforming element upstream and the flow domain of the lower transforming element downstream, wherein the processor processes the flow mechanical input data and generates a changed ΔV-pump model, and the display displays the changed ΔV-pump model.