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CFD approach to evaluate heat transfer in reciprocating compressors.

Number: pap.1492

Author(s) : LACERDA J. F., TAKEMORI C. K.

Summary

How to deal with the heat exchange inside compressors is one of the main challenges on its design nowadays. The heating of the gas entering the compressors decreases its density reducing directly the mass flow and compressor efficiency, so should be avoid. To study this topic it was developed a full three-dimensional model of the gas and the solid parts inside a compressor. Prescribed steady state mass flow rate is imposed at suction and discharge tubes and heat sources due electrical and mechanical inefficiencies of the compressor are imposed. The portion of the suction and cavity gas are separated from the portion of the discharge gas and an isentropic compression from the suction muffler outlet temperature is assumed to define the temperature of the gas flowing through the discharge port. The main advantage of this approach is the directly calculation of the heat transfer coefficients from the solid parts to the fluid, however with a high computational cost. Comparison with experimental data shows good agreement is some parts, but some disagreement in other, probably due the non-consideration of the oil flowing inside the compressor, which are topics for future investigations.

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Pages: 8 p.

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Details

  • Original title: CFD approach to evaluate heat transfer in reciprocating compressors.
  • Record ID : 30019443
  • Languages: English
  • Source: 2016 Purdue Conferences. 23rd International Compressor Engineering Conference at Purdue.
  • Publication date: 2016/07/11

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