Phase Behavior Analysis of CO2 and Formation Oil System

In this paper, there are nine oil samples to explore the characteristics of formation oil at different CO2 injection rate, and the characteristics include bubble point pressure, volume expansion coefficient, viscosity, density, and average molecular weight, composition of gas and liquid phase, and asphalt sediment. According to the experimental results of early nine oil samples of swelling tests, in high temperature and high pressure conditions, characteristics and changing rules of properties of formation oil, including bubble point pressure, volume expansion coefficient, viscosity, density, and average molecular weight, composition of gas and liquid phase, and asphalt sediment, were evaluated and analyzed at different CO2 injection rate systematically. The research not only can provide guides for petroleum engineers when they need to adjust the injection and production programs, but also can provide comparatively comprehensive experimental rules for researches on enhanced oil recovery (EOR) mechanisms of gas miscible and nonmiscible flooding. Moreover, phase parameters of different formation oil system can be extracted for reservoir numerical simulation.

P-Cu alloy as anode materials for lithium ion batteries: a first-principles study

In this paper, based on the first principle method, the mechanism of lithium intercalation and deintercalation of P-Cu alloy as anode material of lithium-ion battery was studied. The results followed that the volume expansion coefficient of Li-P-Cu is small, 59.4650% for Li2PCu3 and 61.4071% for Li2P2Cu, indicating that the introduction of Cu can effectively inhibit the volume expansion of phosphorus. And PCu3 is superior to P2Cu in terms of volume expansion coefficient and lithium intercalation formation energy and good conductivity.

Pengukuran Koefisien Muai Volume Minyak Nabati dan Air Berdasarkan Relasi Linear Antara Perubahan Volume dan Perubahan Temperatur

The objective of this research was to determine the volume expansion coefficient of vegetable oil and water as the effective way to study the fluids’ properties when they are heated. The vegetable oil used in this research is the unused vegetable oil of Filma, while the water used in this study is distilled water. The main instrument in this study is the dilatometer which works based on the principle of fluids expansion. The research methods adopted the methods of the previous researchers, in which the experiment of fluids volume expansion had been conducted in two stages for each fluids (in this case, the fluids were vegetable oil and water). The first stage was heating fluids indirectly through absorbed and distributed heat by an amount of water inside the boiling jug. In the second stage, the heat source was stopped and fluids were allowed to continue expanding in volume due to the rising temperature before the fluids finally experiencing volume contraction due to the decrease in temperature. When the cooling process was carried out, observation and recording of data of fluid column length in glass pipe as a function of temperature were held. Based on those data, the changes in fluids volume due to the cooling process could be estimated. By utilizing the linear relation between volume change and temperature change, the volume expansion coefficient values of vegetable oil and water were (7,2 ± 0,2) x 10-4/0C and (3,2 ± 0,2) x 10-4/0C within the limits of the accuracy of the measuring instrument used in the study.

Physics Learning Based on Practicum: Factors that Affecting Expansion

An object when heated will undergo expansion. Expansion of an object is affected by the expansion coefficient, temperature, and type of object substances that cause the length, area, and volume of the object and other objects differently. Based on these concepts, to investigate the comparative increase in the size of the object that is affected by factors that affect the expansion by heating the body until it reaches the equilibrium temperature. As the object under study will use a block of copper and water with each volume to be measured 10-5 m3 added volume ratio. With the initial temperature of each object 20 oC, both substances will be heated up to a temperature of 30oC, 35oC, 40oC, 45oC, dan 50oC. Both substances are then calculated and compared to the increase in volume experimentally and theoretically. After calculation, a score which indicates that the copper block and the water volume is different. Increase the volume of water is greater than the increase in the volume of copper block in each temperature increment. Both these substances are two different substances that have different volume expansion coefficient as well. So we get that expansion coefficient, temperature, and type of object substances have an affect on the expansion that occurs on an object.

Mathematical Model of Thermal Deformation in Precision Measurement and its Application

As everyone knows, the temperature changes can cause the changes of mechanical geometric size. The thermal deformation obtained by traditional calculation formulas are approximate and linear, used in low precision requirement, however, if applied in high precision field, it is very limited. In this paper, by using the relations between crystal material line expansion coefficient and volume expansion coefficient, we will establish the thermal deformation mathematical model of cylindrical shaft and hole parts in the steady temperature, the model will consider the effects of the shape factors of parts on thermal deformation.

KHASARE'S EQUATION OF STATE TO SOME FLUID MIXTURES: 1-4 DIOXANE IN BENZENE, TETRAHYDROFURAN AND CARBON TETRACHLORIDE

A number of equations have been proposed by workers in the field of liquid state and, upon exploration, these have been found to meet success of varying degrees. Khasare has proposed a new equation of state involving intermolecular potential with three-model parameters. This equation of state has been applied to the binary liquid mixture of benzene, tetrahydrofuran and carbon tetrachloride in 1-4 dioxane. It is observed that there is a close agreement with experimental values for ultrasonic wave velocity, molar volume and, to some degree, volume expansion coefficient. Model parameters are fairly constant over the liquid phase 10 K above m.p. and 10 K below b.p.