Patent ID: 11933198
Assignee: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. The method according to claim 4, wherein, in order to control the flow rate passing through the expander (5), the method comprises the following steps:
if the flow rate (Qklep) through the control valve (4) is equal to or greater than Qmin+Qdelta+Qi and the expander (5) is not switched on yet, switch on the expander (5) with flow rate Qi; and
if the flow rate (Qklep) through the control valve (4) becomes less than Qmin and the expander (5) is not switched off yet, switch off the expander (5);, where:
Qmin is a maximum value of a total flow rate of fluid through the device (1) under which only fluid may flow through the control valve (4) and fluid may not flow through the expander (5);
Qdelta is a hysteresis value that is chosen in function of fluctuation in the total flow rate of the fluid such that the expander (5) is not constantly switched on and then off; and
Qi is the flow rate that can flow through the expander (5).