Active control of the intermediate cavity pressure of a scroll compressor

Abstract

This thesis presents the design and the development of a pressure regulator system of the intermediate cavity of a scroll compressor. The project has been carried out within the Emerson company. The regulator system has been design to apply the optimal pressure at all the possible pressure conditions for the compressor operation in order to increase the compressor performance The heart of the master thesis was to design the pressure regulator system and the feedback control in order to have a stable convergence without disturbing the compressor operation. The control feedback has been implemented in a CompactRIO from the company National Instruments. Furthermore, the optimal pressure has been estimated from the modelling from the Emerson documentation. Performance tests, which reveal a reduction of the consumed power without any significant drop of the capacity, are promising for the future.