| 摘要 |
PURPOSE:To improve the energy recovery efficiency while keeping a constant pressure even at a low flow by using a number of revolution controller so as to adjust number of revolutions of a volume type expander provided in parallel with a control valve between the upper flow and the lower flow of a high pressure gas. CONSTITUTION:The high pressure gas supplied from a up stream side unit 1 passes through a flow detection orifice 2, flows to a lower stream unit 3 via a control valve 4 and also flows to a volume expander 7 via a stop valve 5 and a control valve 6. Its output shaft drives an engine 14, the generator output is inputted to a current type variable voltage variable frequency generator (VVVF)13 via a switch 15 and outputted to a commercial power line 17. A signal switch valve 10 controls the control valves 4, 6 by using a flow signal from the orifice 2 via a transducer 8 and a regulator 9 and setting devices 11, 21. Further, a control circuit 18 uses the number of revolutions of an EXP7 and the direction of power to control a switch 15. |
