A new Group Contribution Method based on elements and chemical bonds was proposed to predict the enthalpy of evaporation organic compounds at their normal boiling points. prediction model built using 1266 experimental data points, accuracy estimations evaluated 16 The method has only 42 groups, a simple way group splitting, wide range predictions with an average relative error 5.84%. Furthermor...

Controlling boiling incipience is of paramount importance for reliable operation of liquid-cooled microelectronic heat sources during power transients. This study focuses on heat transfer from a simulated multichip module to a falling film. Experiments have been performed to develop an understanding of the influence of surface tension and wetting characteristics on sensible heat transfer and bo...

As is well known, boiling is an effective mode of heat transfer in that high heat flux levels are possible with relatively small temperature differences. Its optimal application requires that the process be adequately understood. A measure of the understanding of any physical event lies in the ability to predict its behavior in terms of the relevant paramem. Despite many years of research the p...

in order to evaluate the effect of different mechanical treatments (application of sulphuric acid, boiling water and flooding) on seed dormancy breaking of licorice, an experiment was carried out in randomized complete block design in 2012. moreover, a factorial scheme in rcbd was performed to assess the application of giberalic acid and potassium nitrate treatment as well as stratification and...

some geothermal reservoirs have temperatures below boiling point and therefore natural steam can not be produced for power generation. refrigerant power cycles may be then employed to recover low temperature heat. in this article study is made of the power cycles of six different relligrants and most suitable refrigerants for this purpose are suggested

Boiling point and bubble pressure in binaries with propane were measured for five compounds, 1-pentyne, cyclopentene, 1-hexyne, 2-hexyne, 1,5-cyclooctadiene, new sulfur-free odorants liquefied petroleum gas. The boiling was an ebulliometer under atmospheric pressure. experimental points 313.51, 313.76, 344.53, 357.59 424.02 K respectively. pressures a static apparatus at 303.15 K. also by synth...

A new synthesis of a-hydroxycarboxylates and 2-hydroxybenzoates based on the reaction of acetonides of a-hydroxycarboxylic acids and 2-hydroxybenzoic acid with sodium alkoxides in the corresponding alcohols as solvent is described. In general, decreasing the steric hindrance of the reactants and increasing the boiling points of alcohols increased the yiel...