Densities and excess molar volumes of methanol with three fatty acid methyl esters from 283.15 to 318.15 K

Sun, Yanjun; Di, Gaolei; Xia, Juan; Wang, Xiaopo; Yang, Xiaohu; He, Siyuan

doi:10.1016/j.egypro.2018.09.072

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…Densities of both oils (RL 32H and RL 68H) were measured using a vibrating tube densimeter (model DMA 5000, Anton Paar), that was described in our previous papers. 15 The temperature measurements were performed using two Pt100 platinum thermometers with an accuracy of 0.01 K. The densimeter was calibrated by the dry air and pure water before and after measurements. The standard uncertainty of the density measurement is better than 0.005 kg•m −3 .…”

Section: Apparatus and Methodmentioning

confidence: 99%

Section: Apparatus and Methodmentioning

confidence: 99%

“…Since the vapor pressures of oils are extremely low in the measured conditions, the tiny gaseous component of oil can be neglected. The mass fraction ( w 1 ) of R290 dissolved in oil was calculated by , where M 1 refers to the molar mass of R290; m 2 refers to the oil mass; n 1 refers to the mole number of dissolved R290 in oil, that is obtained by where the subscripts ‘equilib’ and ’ini’ are the equilibrium and initial states; ’sys’ and ’cell’ stand for the gas and equilibrium cells; V 2,cell is the volume of oil injected in the equilibrium cell. The vapor molar volume of R290 (υ gas ) is obtained from Refprop 9.1.…”

Section: Methodsmentioning

confidence: 99%

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Oil Presence Effect on Thermodynamic Performance of the Evaporator Working with R290

Song¹,

Dong

Wei

et al. 2022

J. Chem. Eng. Data

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Propane (R290) as a natural refrigerant has attracted much interest in the refrigeration and air conditioning fields. To increase the solubility-database for R290 in oils and better understand the oil presence effect on evaporator performance, solubilities of R290 in two polyol ester oils (RL 32H and RL 68H) were measured from 253.15 to 343.15 K. The nonrandom two-liquid model was used to correlate the measured data. R290 is more soluble in RL 68H than in RL 32H. New pressure− enthalpy−vapor quality diagrams were plotted for pure R290 and R290/oil blends at different circulating oil mass fractions. A demarcation point was found along the isotherms of the R290 and R290/oil blend, that is mainly dependent on the solubility and circulating oil mass fraction. The lower is the demarcation point, the greater is the contribution of the sensible heat, which is unfavorable to the heat transfer. The enthalpy changes through an evaporator with and without the presence of oil were analyzed, indicating that the enthalpy change ratio increases as the superheat rises and the mass fraction of the circulating oil decreases.

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Section: Apparatus and Methodmentioning

confidence: 99%

Section: Apparatus and Methodmentioning

confidence: 99%