Electrical Determination of Reciprocating Compressor Instantaneous Angular Speed
نویسندگان
چکیده
HVAC compressor units are major energy consumers in both residential and commercial buildings today. Faulty and energy wasting operation of these units often goes unnoticed due to the corrective action of feedback control. Power system monitoring is an exciting approach for creating inexpensive, highly capable methods to monitor compressor unit performance. In this paper we develop a method to estimate the instantaneous angular speed (IAS) of the shaft of a reciprocating compressor from the drive motor's electric signals. Solving the dynamic model of the induction motor overcomes the difficulties that other speed estimation algorithms encounter when the mechanical dynamics are on the same time scale as the electrical dynamics. This procedure obtains useful diagnostic information internal to the compressor without the difficulty of mechanical sensor installation.
منابع مشابه
Non-Intrusive Fault Detection in Reciprocating Compressors
This research presents techniques developed for non-intrusive sensing and fault detection in reciprocating compressors driven by induction motors. These procedures are “non-intrusive” because they rely only on voltage and current signals measured on the compressor power cable. The electrical sensor based method allows for easy and non-intrusive determination of many fault sensitive signals that...
متن کاملTime Resolved Mass Flow Measurement for a Reciprocating Compressor
The instantaneous mass flow was measured during the intake and discharge processes of a reciprocating gas compressor (1)*. The purpose of these measurements was to identify the mechanism which caused a loss of adiabatic and volumetric efficiency that could not be accounted for by valve flow losses. The measurements were made wi ·th square-edged orifices and fast response differential pressure t...
متن کاملCurrent Pulsation Calculations of an Induction Motor Connected to a Reciprocating Compressor
Cyclic vibratory torque requirement of a Reciprocating Compressor sets in torsional vibrations in compressor motor system. Explanation of development of pulsating currents, due to vibratory motion of motor rotor is given. The pulsating currents are superimposed on steady state currents. Mathematical mod~ls for analysing torsional vibrations of the system and nett motor current due to combinatio...
متن کاملSome Aspects of Laboratory Testing of Two-Stage Reciprocating Compressors
The dynamic testing of a two stage reciprocating air compressor with interand after-cooling during the steady and transient state operation is reported and the encountered problems discussed. Measurements and recordings of the instantaneous temperature and pressure in cylinders, suction and discharge chambers and in the associated pipework and air-coolers were carried out together with the inst...
متن کاملReciprocating Compressor Optimum Design and Manufacturing with Respect to Performance, Reliability and Cost
Reciprocating compressors are flexible to handle wide capacity and condition swings, offer a very efficient method of compressing almost any gas mixture in wide range of pressure, can generate high head independent of density, and have numerous applications and wide power ratings. These make them vital component in various units of industrial plants. In this paper optimum reciprocating compress...
متن کامل