Are the surge lines of compressors under different inlet conditions the same?
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I would like to ask: both the performance curve and the surge curve of a compressor show the inlet conditions, such as design pressure and temperature. However, if during actual operation the inlet pressure and temperature of the compressor deviate significantly from the design values, is the surge line still accurate in such cases? Is it still useful for reference? Is it necessary to create another surge line for multiple operating condition transitions?
It is necessary to understand this curve relationship. For example, changes in atmospheric temperature need to be adjusted according to the relevant corresponding relationships. This value should fall within a certain range for reference purposes.
It should be the same. Chuffing is an inherent characteristic of this compressor; it is generally determined through actual measurements, so it does not change as the conditions at the inlet vary
If the compressor can meet the design requirements, but you deviate from the design parameters during operation, then its surge curve should be accurate； If the operating parameters deviate from the designed values due to the compressor not meeting the requirements, then I think the surge line is likely inaccurate as well; it would be best to retest the surge curve.
If the compressor can meet the design requirements, but you deviate from the design parameters during operation, then its surge curve should be accurate； If the operating parameters deviate from the designed values due to the compressor not meeting the requirements, then I think the surge line is likely inaccurate as well; it would be best to retest the surge curve.