Abstract
Accurate comprehension of thermodynamic demeanor and pressure pulsation propagation is of great attractiveness in a reciprocating compressor system. To consider the reciprocal interaction between compressor and pipelines, a hybrid numerical model is thus built by coupling the in-cylinder lumped parameter approach, in-pipe 1D gas dynamics and 3D acoustic characteristics of chambers. The transmission and reflection coefficients of a geometrically complex chamber are achieved by the definition of an acoustic characterization method based on acoustic FEM simulation data, with a high level of accuracy. Numerical results of this new hybrid model are compared with predictions from the traditional hybrid model with in-pipe 1D gas dynamics, together with experimental data. Through comparison analysis, the advantages are highlighted in using the acoustic FEM characterization for complex elements since the new model performs numerical solution without introducing any simplifications to the geometry of fluid domain.
Highlights
Energy demands in developing countries such as South Africa, India, Brazil and China have marked a sharp increase based on the statistical data among 69 countries [1]
This section is focused on evaluation of the developed hybrid model
Mass conservation equation and the first law of thermodynamics are solved in compressor
Summary
Energy demands in developing countries such as South Africa, India, Brazil and China have marked a sharp increase based on the statistical data among 69 countries [1]. One possible way to improve energy efficiency is optimizing the working performance and reliability of reciprocating compressor since it is an important component in many industries such as refrigeration systems, petrochemical plants and civil applications, and has a significant role among the total energy consumption. Particular attention should be paid to the enhancement of thermodynamic efficiency and the control of pressure pulsation which may induce local noise and piping vibration. In this view, contribution of a well-tuned numerical model in the preliminary design process is unquestionable for evaluating the compressor performance and preventing its matching mistakes
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