PρTx measurements for HFC-134a + triethylene glycol dimethylether system

Liquid density of oxygenated additive 2-propanol at pressures up to 140MPa and from 293.15K to 403.15K

“…The estimated uncertainty of the measured pressure was ±0.015 MPa (Presens Precise Gold Plus pressure transmitter) and the estimated uncertainty of the determined density was ±0.5 kg m À3 (i.e., around 0.05% for density close to water density). This uncertainty is similar to that reported in several studies [3][4][5]14,15,[18][19][20][21]. No measurements have been done at p = 0.1 MPa and T higher than 353.15 K because the boiling temperature of 2-propanol at atmospheric pressure is around 355.5 K.…”

“…In order to better correlate our values over our entire temperature and pressure ranges, i.e., to improve the previous representation (and consequently the evaluation of the derived properties); we use the following Tait-like equation, which has been used in our previous works [3][4][5][14][15][16][17][18][19][20][21][23][24][25]:…”

Bubble pressure measurements for the (1,1,1,2-tetrafluoroethane+triethylene glycol dimethyl ether) system

“…The polyalkylene glycols (PAGs) have been proposed as suitable lubricants for R134a and several researchers have focused their attention on such mixtures, for which measurements of solubility [1][2][3][4][5], density [6][7][8][9], and viscosity [6,[10][11][12] have been obtained. A technical lubricant is usually a mixture of several components sharing a same chemical structure, e.g., PAGs, in which few of them are prevailing in composition; some additives are furthermore added to this mixture.…”

Viscosity measurements and correlations of binary mixtures: 1,1,1,2-tetrafluoroethane (HFC-134a)+tetraethylene glycol dimethylether (TEGDME)

“…However, in spite of their importance, there are only a few studies available in the literature on the thermophysical properties of the HFC-134a + PGDME system [2][3][4][5][6].…”