Causes and effects of compressor stall and surge

As a general rule, the anti-surge control will rapidly prevent/interrupt surging of the compressor, owing to its highly dynamic features.

An anti-bogdown control system monitors and regulates operation of a turbine and a compressor to prevent underspeed trip of the turbine while avoiding surge of the compressor.

The arrangement provides for a significant improvement in the surge margin of the compressor and is particularly suitable for use in a turbocharger.

Furthermore, obstructing this section raises the surge line of the HP compressor, affecting its operability.

In another embodiment, the refrigerant temperature is measured after some minimal compression and minimal temperature rise has occurred within the compressor pumping elements.

The capacity of the turbine may be increased at low engine speeds, to reduce the pressure ratio across the turbine and across the compressor (16) which it drives, thereby improving the surge margin of the compressor.

Air can be fed via the first air duct in order to adjust the surge line of the compressor, while air can be discharged via the second air duct (22).

An adjustable flow control device (60) is configured to control the flow of the compressed air through the recirculation passage to control a surge characteristic of the compressor.

A control panel (140) controls the operation of a hot gas bypass valve (134) so as to avoid surging of the compressor (110) in response to cooling load and head.