A turbocompressor refrigeration machine characteristics’ calculation

Transient Characteristics of a Single-Effect Absorption Refrigeration Cycle

This paper deals with a lumped-parameter dynamic simulation of a single-effect LiBr-H2O absorption chiller. In many studies the thermodynamic properties of LiBr-H2O solution were taken from some approximate relations causing the results to be somewhat inaccurate. These relations were used to solve simultaneous differential equations involving the continuity of species constituting the LiBr-H2O ...

Permanent Magnet Synchronous Machine Parameters Identification for Load Characteristics Calculation

Self reactanceXd in direct axis ’d’ and self reactanceXq in quadrature axis ’q’ influence the load characteristics of the permanent magnet machine. Their calculation methods are known. All calculations should be verified by measurements. Measurement with AC variable voltage and frequency source applied on stator winding is correct when eddy currents do not exist. Other methods evaluate the DC c...

Calculation and Measurement of the Crankshaft Motion In the Bearings of a Refrigeration Compressor

Generalized Performance Characteristics of Refrigeration and Heat Pump Systems

A finite-time generic model to describe the behavior of real refrigeration systems is discussed. The model accounts for finite heat transfer rates, heat leaks, and friction as different sources of dissipation. The performance characteristics are cast in terms of cooling rate (r) versus coefficient of performance (w). For comparison purposes, various types of refrigeration/heat pump systems are ...

Implemented Finite Element Routines for the Calculation of Quasi-Steady and Transient Characteristics of a Squirrel Cage Induction Machine

Successful optimization processes of highly utilized industrial squirrel cage induction machines enforces fast, reliable and accurate design concepts. Therefore, modern numerical finite element calculation procedures, which incorporate moveable rotor parts, non-linear iron saturation effects and realistic geometric properties, have been systematically established and applied to an induction mot...