Abstract: A sensor arrangement used for measuring fouling and/or erosion in a machine. A first piezoelectric transducer, a first plate and eventually a first support member form a first vibrating mass. After electrically stimulating the first piezoelectric transducer, the first vibrating mass starts vibrating mechanically and consequently the first piezoelectric transducer generates an electric resonance vibration; the electric resonance vibration is at a resonance frequency depending on the mass of the first vibrating mass. If the mass of the first vibrating mass changes due to fouling and/or erosion by a flow of working fluid in the machine, also the electric resonance vibration frequency changes; such vibration frequency change may be measured and the corresponding mass change may be determined by comparison with a vibration frequency of a second vibrating mass not exposed to the flow of working fluid in the machine.

Abstract: In a machine, for example a centrifugal compressor, erosion and/or corrosion of a part of the machine exposed to a working fluid to be processed by the machine is/are monitored; a corrosion probe and/or an erosion probe is/are suitably positioned inside the machine; the corrosion probe and/or the erosion probe is provided with a measurement element that is exposed to the working fluid when the machine operates; the measurement element is made of the same material of the part to be monitored so that the measurement element and the part are eroded and/or corroded in the same or similar way and/or at the same or similar rate. Corrosion and/or erosion data detected by the probe are transmitted from the probe to an electronic unit.

Abstract: A system and computer-implemented method for generating real-time performance advisories for a centrifugal compressor of a fleet of centrifugal compressors are provided. The method includes receiving an actual thermodynamic signature of the compressor, that is unique to the compressor, receiving compressor process parameter values during operation of the compressor, determining, in real-time, an actual performance of the compressor using the compressor process parameter values, determining, in real-time, a predicted performance of the compressor using the received actual thermodynamic signature of the compressor, determining a performance deviation of the compressor using the actual performance and the predicted performance, comparing the performance deviation to a predetermined dynamic threshold range of performance deviation specific to operating speed, and generating a notification to a user using the comparison.

Abstract: A system and computer-implemented method for generating real-time performance advisories for a centrifugal compressor of a fleet of centrifugal compressors are provided. The method includes receiving an actual thermodynamic signature of the compressor, that is unique to the compressor, receiving compressor process parameter values during operation of the compressor, determining, in real-time, an actual performance of the compressor using the compressor process parameter values, determining, in real-time, a predicted performance of the compressor using the received actual thermodynamic signature of the compressor, determining a performance deviation of the compressor using the actual performance and the predicted performance, comparing the performance deviation to a predetermined dynamic threshold range of performance deviation specific to operating speed, and generating a notification to a user using the comparison.