Abstract
In this study, speeds of sound in HFO-1234yf near saturated and subcooled liquid phases were measured with a sound velocity sensor. The measurement for near saturated liquid was conducted at the temperature range of 273 to 353 K, and that for subcooled liquid was conducted at ranges of temperature from 273 to 353 K and pressure from 1.05 to 2.52MPa. In order to validate the sound velocity sensor, the measurements in subcooled water and near saturated liquid of HFC-134a at the temperature range from 273 to 353 K were also performed. The measurement result of water was compared with those calculated from REFPROP (based on IAPWS-95) and PROPATH (based on IAPWS-IF97). The result of water agrees well with that calculated from REFPROP with a maximum deviation of 0.28%, except for the temperature of 353 K. And it agrees well also with that calculated PROPATH with a maximum deviation of ±0.2%. The measurement results for near saturated and subcooled liquid of HFO-1234yf were compared with those calculated from REFPROP and JSRAE thermodynamic table.
