in this contribution, two approaches are followed to predict the saturated liquid density of liquefied natural gas (lng) mixtures. in one approach, 12 cubic equations of state (eoss), comprising the popular peng-robinson (pr) and redlich-kwong-soave (rks), are employed to predict the saturated liquid density of 20 lng mixtures. in the other approach, these eos are used in conjunction with a rec...

Six species of Lathrobium Gravenhorst, 1802 from the Emei Shan, Sichuan, are described and illustrated: Lathrobium iunctum Assing & Peng sp. n., Lathrobium coniunctum Assing & Peng sp. n., Lathrobium conexum Assing & Peng sp. n., Lathrobium ensigerum Assing & Peng sp. n., Lathrobium hastatum Assing & Peng sp. n., and Lathrobium bisinuatum Assing & Peng sp. n. Based on their primary and secondar...

sCO2 power cycle is the most investigated and promising technology for replacing conventional steam in CSP plants. Nevertheless, efficiency of strongly penalized by high ambient temperatures which are typical favourable locations. This paper focuses on a new working fluid cycles consists CO2 blended with C6F6. The addition C6F6 increases critical temperature allowing condensing up to 45 °C. cal...

Material of the paederine genus Lathrobium Gravenhorst, 1802 from the Donggong Mountains, eastern China, is examined. Fifteen species are identified, seven of them described previously and eight undescribed. Seven species are described and illustrated for the first time, all of them micropterous and locally endemic: L. haoae Peng & Li sp. n., L. songi Peng & Li sp. n., L. yui Peng & Li sp. n., ...

This study developed a novel C-sharp (C#) programming language for the estimation of bubble point pressure (BPP) various hydrocarbon mixtures at equilibrium state. The methodology was based on vapor–liquid calculation using Peng Robinson equation state implementation, thermodynamic and Newton-Raphson’s method successive substitution unknown variables. equal fugacity constraint can be satisfied ...

The minimum miscibility pressure (MMP) is one of the crucial and substantial parameters in the gas injection projects for enhanced oil recovery (EOR). This parameter indicates the minimum pressure at constant temperature and composition conditions for reaching 100 percent of the oil production recovery which leads to a huge economic income. Therefore, an inaccurate prediction of the MMP may lea...

Cold gas propulsion systems are preferred, especially for the altitude and trajectory control satellites, since 1960s. Both depressurizing propellant in tank throughout mission expansion occurring divergent part of thruster nozzle reasons observing very low temperatures pressure at outlet section. We have decided to use an open-source compressible CFD tool, SU2, order predict performance system...

• R1132(E) is a promising next-generation refrigerant with zero ODP and very low GWP. saturation pressures were measured between 240 K to the critical temperature. The pressure of was directly as 5172.5 ± 1.0 kPa. A Wagner-type equation optimized for pressures. acentric factor determined used in Peng-Robinson EoS. (trans-1,2-difluoroethylene, C 2 H F ) potential next generation be utilized air ...

the critical properties of a solute are required for modeling of the solubility by the equation of state. for many compounds, the critical properties are not available. so, group contribution method is utilized as a common method to estimate these properties. but, it leads to the consecutive errors in calculations of the solubility modeling. in this study, soave-redlish-kowang (srk) and peng-ro...