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Hermetic reciprocating compressor simulation using a multi-physics platform.

Number: 1357

Author(s) : ARAUJO M. C. de, TUHOVCAK J., BRANCHER R. D., DUTRA T.

Summary

The development of high-efficiency compressors for refrigeration systems urges a detailed and multidisciplinary knowledge of the interactions among different phenomena that take place in these compressors. Moreover, the demand for shorter project lead times has been encouraging researchers to increasingly adopt simulation and less prototyping during the compressor design stage. As a result, simulation models that consider multi-physics phenomena have been more explored lately. This paper presents a simulation model for a hermetic reciprocating compressor developed in a commercial multi-physics platform. This platform provides a comprehensive set of component libraries including different physics that can be easily handled via a drag-and-drop environment, allowing a faster and more intuitive model construction. The integrated model adopted in this work considers a sub-model for the compression chamber to predict mass flow rate and compression power, and a thermal sub-model to calculate the temperatures of the compressor components. The compression chamber model is based on unsteady-state lumped-parameter formulations of energy and mass conservation equations, with a mechanical model based on a one-degree-of-freedom mass-springdamper system for the valve dynamics. The thermal model follows a steady-state lumped formulation of the mass and energy equations applied to several control volumes that represent compressor components. The simulation outcome for mass flow rate, compressor power and temperature at different components was validated with experimental results and a good agreement was observed. Finally, operational parameters were varied, and simulations were performed to assess the impact of these modifications on the compressor performance and temperature at several components.

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  • Original title: Hermetic reciprocating compressor simulation using a multi-physics platform.
  • Record ID : 30030311
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15
  • Document available for consultation in the library of the IIR headquarters only.

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