Reuse Remaining Air Pressure in Classical Pneumatic System

In practical industrial applications of pneumatic systems, the issues of energy saving are receiving attention due to the considerable amount of compressed air wasted in operation. This research investigates a configuration of pneumatic systems while a special emphasis is put on the saving of energy in the execution. A method of recovering energy is also presented. In order to improve the performance and energy efficiency of the pneumatic drive, the by-pass valve control scheme is designed and studied. For pneumatic positioning application, in the constant speed phase, the inlet and outlet chambers will be connected via by-pass valve to reduce the overshoot and allow exhaust compressed air to be reused. Three supply pressures used5, 7 and 9 bars, compared with the traditional control of the motion of the asymmetric cylinder in which maximum energy saving obtained at 5, 7 and 9barare 16.7% 23.44% and 23.5% respectively.