Liquefied petroleum gas (LPG) is an important urban gas source in China. Before supplied to customers by pipeline supply systems, LPG is stored in tanks in LPG vaporization stations. Designers usually decide the number and the size of storage tanks by their experience during constructions of vaporization stations. These decisions are usually not best and most economical. To solve the problem, a...

The vaporization, fusion, and sublimation enthalpies of methyl, ethyl, propyl, and butyl paraben are reported and compared with literature values. The vaporization enthalpies were measured by correlation gas chromatography and the fusion enthalpies by differential scanning calorimetry. Adjusted to T = 298.15 K, these enthalpies were combined to yield the sublimation enthalpy. The results compar...

In this research, both the standard molar enthalpy of formation in crystalline phase and gas 3-methylglutaric anhydride was calculated from experimental data. The temperature fusion, as well heat capacity solid by differential scanning calorimetry; sublimation at 298.15 K Knudsen effusion method, vaporization thermogravimetric analysis, massic combustion energy adiabatic calorimetry. Since 3,3-...

Experimental vapor pressures, vaporization, fusion and sublimation enthalpies of a number of dialkyl benzenedicarboxylates have been examined by correlation gas chromatography (CGC) experiments in order to identify a series of experimental measurements that appear to be internally self-consistent. The compounds studied in this regard include dimethyl phthalate dimethyl terephthalate, dimethyl i...

Pair-wise interaction models are frequently used to describe the behavior of complex processes to facilitate conceptualization, even if the numerical predictions may only be approximate. Such a model describing the forces of vaporization in liquids has been suggested by Prebeg. When applying such heuristic models it is important delineate their range of applicability. Prebeg’s model has been mo...

Heat transfer via acoustic waves, known as adiabatic thermalization or the piston effect, was previously studied in enclosures under microgravity and terrestrial conditions with carbon dioxide (CO2). Here we report on importance of effect flow boiling a microchannel. It is shown that because large density variations, asymptotical behavior specific heats ratio, enhances heat near critical condit...

This paper considers the problem of studying heat transfer exchange during boiling in a direct-flow recycling boiler using an organic coolant. The study was conducted numerical modelling ANSYS software package. Asaresultofthestudyavisual picture eofvaporphasedistributionwasobtained. shows that studied heat-exchange surface can be conditionally divided into two areas: area intense vaporization a...

The molecular topology of a graph is described by topological indices, which are numerical measures. In theoretical chemistry, indices quantities that used to represent the networks. These can be calculate several physical and chemical properties compounds, such as boiling point, entropy, heat generation, vaporization enthalpy. Graph theory comes in handy when looking at link between certain so...