Compressor system

A compressor system, comprising:

• a compressor having:
• an upstream region into which a working fluid flows,
• a downstream region that communicates with the upstream region and in which a pressure of the working fluid is greater than that in the upstream region,
• inlet guide vanes that are provided further upstream than the upstream region and are capable of altering a flow rate of the working fluid flowing into the upstream region, and
• an extraction part that is provided to a portion between the upstream region and the downstream region and is capable of extracting at least a portion of the working fluid;
• detection devices, at least one of which is provided in each of the upstream region and the downstream region, for detecting a physical quantity of the working fluid;
• and
• a control device for adjusting, on the basis of changes in the physical quantity detected by the detection devices, an opening degree of the inlet guide vanes and an amount extracted by the extraction part,
• wherein the compressor includes:
• a rotor shaft that is capable of rotating around an axis line;
• a plurality of rotor blade stages that are provided on the rotor shaft and arranged in a direction of the axis line;
• a casing that covers the rotor shaft and the rotor blade stages from an outer circumferential side;
• and
• a plurality of stator blade stages that are provided on an inner circumferential surface of the casing and arranged alternately with the plurality of rotor blade stages in the direction of the axis line,
• wherein the upstream region is a region further upstream than a rotor blade stage of the plurality of rotor blade stages that is a third stage from the furthest upstream side,
• wherein the downstream region is a region further downstream than a rotor blade stage of the plurality of rotor blade stages that is a third stage from the furthest downstream side,
• wherein each of the stator blade stages extends in a radial direction with respect to the axis line and includes a plurality of stator blades arranged in a circumferential direction and having a suction surface facing upstream and a pressure surface facing downstream,
• wherein each of the detection devices is provided on the suction surface, and
• wherein the physical quantity includes a flow direction and a flow velocity of the working fluid based on a temperature of the working fluid.

A compressor system, comprising:

• a compressor having:
• an upstream region into which a working fluid flows,
• a downstream region that communicates with the upstream region and in which a pressure of the working fluid is greater than that in the upstream region, and
• inlet guide vanes that are provided further upstream than the upstream region and are capable of altering a flow rate of the working fluid flowing into the upstream region;
• detection devices, at least one of which is provided in the downstream region, for detecting a physical quantity of the working fluid;
• and
• a control device for adjusting, on the basis of changes in the physical quantity detected by the detection devices, an opening degree of the inlet guide vanes,
• wherein each of the detection devices includes a pair of temperature detection units that are arranged in a flow direction of the working fluid;
• and
• wherein a heating unit that is disposed between the pair of temperature detection units and heats the working fluid,
• wherein the physical quantity includes a temperature difference of the working fluid detected by the pair of temperature detection units, and
• wherein when a command for reducing a load of the compressor is issued, the control device determines a speed at which each of the inlet guide vanes is closed on the basis of a magnitude of the physical quantity.