The viscosity of liquid R134a

• Autor(es): Oliveira, Carla Padrel de ; Wakeham, W. A.
• Data: 1993
• Identificador Persistente: http://hdl.handle.net/10400.2/1964
• Origem: Repositório Aberto da Universidade Aberta
• Assunto(s): High pressure; Refrigerants; R134a; Viscosity
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

The paper reports new measurements of the viscosity of liquid R134a over the temperature range 235 to 343 K and pressures up to 50MPa. The measurements have been carried out in a vibrating-wire viscometer calibrated with respect to the viscosity of several liquid hydrocarbons. It is estimated that the uncertainty in the viscosity data reported is +0.6%. The data therefore have a lower uncertainty than that of earlier measurements of the viscosity of this environmentally acceptable regrigerant. The viscosity data have been represented as a function of density by means of a formulation based upon the rigid, hard-sphere theory of dense fluids with a maximum deviation of _+0.3%. This representation allows the present body of experimental data to be extended to regions of thermodynamic state not covered by the measurements.