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Numerical Analysis of Performance, Rotor Temperature Distributions, and Rotor Thermal Deformation of an R134a Screw Compressor

By Shenghung Hsieh, Wenhsin Hsieh, Chishun Huang and Yuhua Huang

Abstract

A numerical analysis is performed to systematically calculate the performance, rotor temperature distributions, and rotor thermal deformation of an R134a screw compressor. The analysis procedure includes three major steps. The first step calculates the efficiencies and the temperature- and pressure-time histories of the refrigerant during a compression cycle of the screw compressor. The calculation is performed based on a theoretical model, which considers the mass and energy conservation laws, the leakages through various paths, and the discharges of gas and oil. The heat transfer between gas and oil is also considered. The second step calculates the temperature distributions in the rotors by numerically solving the set of Helmholtz equations derived from the partial differential equations for transient heat conduction of the rotors. Each of the two rotors is subject to a periodic convective boundary condition and five steady boundary conditions. The third step calculates thermal deformations of rotors by a finite element method based on the calculated temperature distributions from the second step. The proposed theoretical models and numerical procedures are shown to be able to efficiently calculate the performance, rotor temperature distributions, and rotor thermal deformations. The calculated information is important and useful in the design of a refrigerant screw compressor

Topics: screw compressor, performance, temperature distribution, thermal deformation
Publisher: Purdue University
Year: 2012
OAI identifier: oai:docs.lib.purdue.edu:icec-3114
Provided by: Purdue E-Pubs

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Citations

  1. (2005). Boundary adaptation in grid generation for CFD analysis of screw compressors,
  2. (2011). Calculation of temperature distributions in the rotors of oil-injected screw compressors,
  3. (2007). CFD integrated design of screw compressors,
  4. (2006). Essential concepts of bearing technology,
  5. (1990). Mathematical modeling and experimental investigation of refrigeration screw compressor working process,
  6. (2007). Mathematical modeling of the working cycle of oil injected rotary twin screw compressor,
  7. (1995). Performance analysis of an oil-injected screw compressor and its application,
  8. (2011). Performance analysis of screw compressors – Numerical simulation and experimental verification,
  9. (1999). Performance and bearing load analysis of a twin screw air compressor,
  10. (2003). Predictions of temperature rise for ball bearings,
  11. (2009). Research on the performance of water-injection twin screw compressor,
  12. (2008). Rotor profile design for the twin-screw compressor based on the normal-rack generation method,
  13. (2005). Screw compressors - Mathematical modelling and performance calculation, Springer-Verlag
  14. (2000). Screw compressors - Theory, dsign and application, China Machine Press,
  15. (2007). Screw compressors - Three dimensional computational fluid dynamics and solid fluid interaction, Springer - Verlag
  16. (2011). Temperature and thermodynamic deformation analysis of the rotors on a twin screw multiphase pump with high gas volume fractions,
  17. (1995). The analysis of leakage in a twin-screw compressor and Its application to performance improvement,
  18. (1998). The twin helical screw compressor Part 2: a mathematical model of the working process,
  19. (2004). Theoretical and experimental study on indicator diagram of twin screw refrigeration compressor,

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