Comparison of thermophysical properties for oil/refrigerant mixtures by use of the pulse heating method

Prediction of phase equilibria and thermodynamic properties of refrigerant/oil solutions

“…The values of the pseudocritical parameters predicted by the procedure proposed above are in good agreement with the experimental results from the recent investigations carried out by the authors of [15,19].…”

“…Information about the pseudocritical parameters for the oils and the ROS is unavailable in the literature. The only suitable known experimental method for measuring critical parameters is the method of impulse heating [15] which is very fast, has the required level of experimental uncertainties, and is rather simple.…”

An experimental investigation and modelling of the solubility, density and surface tension of 1,1,1,3,3-pentafluoropropane (R-245fa)/synthetic polyolester compressor oil solutions

“…The experimental data for the density and vapor pressure of the ROS R-245fa/Planetelf ACD 100FY were described using The pseudocritical temperature and pressure for polyolester compressor oil Planetelf ACD 100FY were experimentally determined by the method of pulse heating [30]. Table 2 Thermophysical properties of the polyolester compressor oil Planetelf ACD 100FY the following equations [22][23][24]:…”

“…The coefficients of the equations are independent of the range of the initially fitted information and have a physical meaning [23]. The pseudocritical temperature and pseudocritical pressure of the pure polyolester compressor oil Planetelf ACD 100FY were measured using the method of pulse heating [30] and were equal toT C ¼ 807 K andP C ¼ 8 bar correspondingly. The experimental data for the capillary constant of the ROS R-245fa/Planetelf ACD 100FY can be correlated by the polynomial dependencies:…”

The Phenomenon of Superheat of Liquids: In Memory of Vladimir P. Skripov

“…One way of doing this is to apply a suitable evolutionary method based, for example, on a genetic algorithm [33]. The analysis of the "tail" portion of the boiling-up signal (t > t * ) is also used in a number of applications, such as the estimation of critical parameters for thermally unstable liquids [34] (including gas-saturated oils [35]), comparison of short-time thermal stabilities of polymeric liquids, and probing the content of volatile impurities in oil, including their traces [30][31][32]. The method allows performing measurements over wide range of conditions (pressure, temperature, composition of a mixture, regime of heating) and to study "inconvenient" substances, such as polymeric liquids, gas-saturated liquids, and nanofluids.…”