Share

Transient characteristics of free piston Vuilleumier cycle heat pumps.

Author(s) : MATSUE J., FUJIMOTO N., SHIRAI H.

Summary

A dynamic analysis of a free piston Vuilleumier cycle heat pump was performed by a time-stepping integration method to investigate transient characteristics under power controlling. The nonlinear relationship between displacement and force for pistons was taken into account for the motion of reciprocating components, in addition to the pressure change of working gas, nonlinear viscous dissipative force due to an oscillating flow and discontinuous damping force caused by solid friction. The displacements of pistons and pressure changes in the Vuilleumier cycle heat pump were integrated by an ideal isothermal thermodynamic relationship. It was assumed that the flow friction was proportional to the kinematic pressure of working gas, and that the solid friction at the seals was due to the functions of the working gas pressure and the tension of seal springs. In order to investigate the transient characteristics of a machine when parameters were changed, some calculations were performed for a proposed case study machine and discussed.

Details

  • Original title: Transient characteristics of free piston Vuilleumier cycle heat pumps.
  • Record ID : 2006-2632
  • Languages: English
  • Source: Green breeze from Asia: frontiers of refrigerants, heat transfer and system.. ACRA-2002. Proceedings of the Asian conference on refrigeration and air conditioning.
  • Publication date: 2002/12/04

Links


See other articles from the proceedings (50)
See the conference proceedings

Indexing