Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Sun, Yanjun, once mentioned the application of 578-57-4, Name is 1-Bromo-2-methoxybenzene, molecular formula is C7H7BrO, molecular weight is 187.03, MDL number is MFCD00000064, category is ethers-buliding-blocks. Now introduce a scientific discovery about this category, Computed Properties of C7H7BrO.
Effect of refrigerant/oil solubility on thermodynamic performance of the evaporator working with R600a and DME
Isobutane (R600a) and dimethyl ether (DME) as promising refrigerants have attracted wide attention. To better understand their evaporative performance in the presence of oil, the solubilities were measured for R600a and DME in squalane from 293.15 K to 348.15 K. The data was correlated by the NRTL model. A new pressure-enthalpy-vapor quality diagram, which is applied to pure refrigerant and refrigerant/oil mixtures with various circulating oil mass fractions, is presented based on the data. The critical vapor quality was found in the isotherm of the refrigerant/oil mixture, and it depends on the circulating oil mass fraction and refrigerant/oil solubility. The higher critical vapor quality, the greater contribution of the latent heat, which is beneficial for heat transfer. The enthalpy changes through an evaporator with and without taking into account the effect of oil, as well as the non-evaporated quantity of refrigerant at the evaporator outlet, were also analyzed. The enthalpy change ratio increases with an increase of superheat and decreases with an increase in mass fraction of circulating oil. The non-evaporated quantity decreases with an increase of superheat and increases with an increase in the mass fraction of oil circulation. (C) 2020 Elsevier Ltd.
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