422 新規代替冷媒HF0 1234yfに関するPVT性質の測定(<企画>環境共生型次世代作動流体)

概要

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As an environmentaly friendly refrigerant, hydrofluoroolefins (HFOs) are regarded as the promising alternative candidate. HFO 1234yf (2,3,3,3-tetrafluoropropene) is expected to alternate HFC 134a or CFC 12, since its GWP (global warming potential) is as low as other hydrocarbons. Although numbers of HFO 1234yf drop-in results for ready-made systems have been reported, essential thermodynamic properties for HFO 1234yf are not studied. In the present study, gas-phase PVT properties were measured by the double-sinker magnetic levitation densimeter which has great performance to measure fluid density at high-temperature and high-pressure conditions. As the preliminary data, 16 measured data are presented. Because of the impurity of available HFO 1234yf sample, relative uncertainty of the present data is about 0.5 %. A couple of available thermodynamic property models were employed to evaluate their reproducibility in gas-phase.
一般社団法人日本機械学会の論文
2009-07-08