Device for modifying flow parameters of working fluid exiting a compressor device

Abstract

This disclosure describes improvements that can expand the operating envelope of a compressor device. These improvements implement devices that vary flow parameters of a working fluid at the exit of the compressor device. In one embodiment, the device utilizes a nozzle that installs into the discharge opening on a volute of a centrifugal compressor. Actuation of the nozzle modifies a flow area through which the working fluid exits the centrifugal compressor. The change in the flow area increases the velocity of the working fluid, without the need to change the operating speed and / or other operating parameters of the centrifugal compressor.

Description

BACKGROUND[0001]The subject matter disclosed herein relates to compressor devices and, in particular, to manipulation of flow parameters at an outlet region to expand the operating envelope of a compressor device (e.g., centrifugal compressors).[0002]Compressor devices draw a working fluid into an inlet, compress the working fluid, and expel the compressed working fluid from an outlet. The flow parameters of the working fluid at the outlet are often set to satisfy performance and / or other characteristics for a process, application, and / or setting, that utilizes the compressor device. For example, the process may require the compressor to deliver the working fluid at a set of designated setpoints, e.g., flow rate, pressure, etc. The compressor device must operate in a manner so that the working fluid enters the inlet at an inlet flow rate to achieve these setpoints. However, as a competing interest, many process owners wish to operate the compressor device as efficiently as possible ...

AI Technical Summary

Benefits of technology

This patent describes some ways to make a compressor device work better by changing the way it exits. One way to do this is by putting a nozzle on the end of a centrifugal compressor. When the nozzle is changed, it changes the way the fluid comes out of the compressor, making it move faster without needing to change any other settings. This improves the function of the compressor device and makes it work better.

Problems solved by technology

However, by approaching these lower boundaries of the operating envelop, the compressor device can enter various fault conditions (e.g., surge) that can have adverse affects on the process and, notably, damage the compressor device.

Images