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Binary system
About: Binary system is a research topic. Over the lifetime, 5788 publications have been published within this topic receiving 97882 citations.
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TL;DR: In this article, the three-phase equilibrium (pressure−temperature) relation of the difluoromethane + water binary system containing gas hydrates was measured in the pressure range from 0.20 to about 11.0 MPa and temperature range from (275.15 to 300.15) K.
Abstract: The three-phase equilibrium (pressure−temperature) relation of the difluoromethane + water binary system containing gas hydrates was measured in the pressure range from (0.20 to about 11.0) MPa and temperature range from (275.15 to 300.15) K. On the basis of each three-phase equilibrium curve, the quadruple point which consists of gaseous and liquid difluoromethane, water, and hydrate was determined as 1.45 MPa and 293.16 K. The in situ Raman spectroscopy under the three-phase (gas, water, and hydrate) equilibrium conditions showed that the crystal structure of difluoromethane gas hydrate was structure-I, where both small and large cages were occupied by the difluoromethane molecule. The overall hydration enthalpy of simple structure-I difluoromethane gas hydrate under the three-phase equilibrium conditions was evaluated by means of the Clapeyron equation.
35 citations
TL;DR: In this article, the Wolf-Rayet star WR25 is shown to be an eccentric binary system with a probable period of about 208 days, and the radial velocities of the star are derived from spectroscopic data acquired mainly between 1994 and 2006.
Abstract: Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD93162 (=WR25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. We spectroscopically monitored this object to investigate its possible variability to address this discordance. We compiled the largest available radial-velocity data set for this star to look for variations that might be due to binary motion. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched these radial velocities for periodicities using different numerical methods. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR25 is an eccentric binary system with a probable period of about 208 days.
35 citations
TL;DR: In this paper, isothermal vapour-liquid equilibrium data have been measured for the binary system R134a+DME at five temperatures between 293.18 and 358.15 K, and pressures between 0.4899 and 2.9442 MPa.
35 citations
35 citations
TL;DR: In this article, the authors used the data measured in this work along with some excess enthalpy data, which were taken from the literature, were used for the thermodynamic modeling of the water/AMP binary system.
35 citations