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Compressed liquid density measurements for 2,3,3,3-tetrafluoroprop-1-ene (R1234yf)


L. Fedele1, L. Colla1, S. Bobbo1, M. Scattolini1, C. Zilio2 and J. Brown3

1Consiglio Nazionale delle Ricerche, Istituto per le Tecnologie della Costruzione, Padova, Italy
2Dipartimento di Fisica Tecnica, Università degli Studi di Padova, Padova, Italy
3Department of Mechanical Engineering, The Catholic University of America, Washington, DC, USA

Keywords: experimental method, vibrating-tube densimeter
property: compressed liquid density, saturated liquid density
material: 2,3,3,3-tetrafluoroprop-1-ene (R1234yf)

In the last years, a big effort has been done in studying refrigerants with low global warming potential (GWP), especially due to several restrictive laws and agreements at national, and international levels. Recently, the European Union’s F-Gas regulations [1, 2] has introduced a limit in the GWP of refrigerants for automotive, fixed at 150 from the beginning of 1 January 2011 for new car models and from 1 January 2017 for new vehicles. Amongst others, 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf) is a new alternative refrigerant with a very low GWP (4 in a 100-year time horizon) and saturation pressure very similar to 1,1,1,2-tetrafluoroethane (R134a), and then suitable for automotive applications [3]. This fluid has been studied in the automotive industry in the past few years, but only few thermodynamic and transport property data, and associated Equations of State (EoS), have been published in the literature, especially regarding its PρT behaviour. For this reason, a research project on this fluid has been started at our institute [4, 5] and here, a set of compressed liquid density data is presented. The density along six isotherms between (283.15 and 333.15) K and up to 35 MPa was measured by means of a vibrating tube densimeter (Anton Paar DMA 512), with an estimated uncertainty about 0.05%. Saturated liquid densities were extrapolated from the measured data using a polynomial. The results of the compressed liquid density measurements and the extrapolated values of saturated liquid density were correlated with fitting equations and compared to existing experimental data sets.

References
  1. Regulation (EC) No 842/2006 of The European Parliament and of the Council of 17 May 2006 on Certain Fluorinated Greenhouse Gases, Official J. European Union.

  2. Directive 2006/40/EC of The European Parliament & of the Council of 17 May 2006 Relating to Emissions from Air-Conditioning Systems in Motor Vehicles & Amending Council Directive 70/156/EC, Official J. European Union.

  3. SAE. Industry evaluation of low global warming potential refrigerant HFO-1234yf. 2009. Retrieved online at: http://www.sae.org/standardsdev/tsb/cooperative/crp1234-3.pdf, December 11, 2010.

  4. S. Bobbo, F. Groppo, M. Scattolini, L. Fedele, to be presented at “The 23rd IIR International Congress of Refrigeration”, 21-26 August 2011, Prague, Czech Republic.

  5. L. Fedele, S. Bobbo, F. Groppo, J. S. Brown, C. Zilio, sent for publication to the J. Chem. Eng. Data.

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