Measurement and Prediction of Enthalpy for High-Pressure Gaseous Mixtures.

高压气体混合物的焓的测量和预测。

• 批准号: 62550702
• 负责人: MASUOKA Hirokatsu
• 金额: $ 1.28万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550702/
• 关键词: Enthalpy; Isothermal Flow Calorimeter; High-Pressure Gas; Gaseous Mixture; Equation of State; Nitrogen; 二酸化炭素

In the present work, a new calorimeter was developed and enthalpies of high-pressure gases were measured using it.1. Development of a new calorimeter: The isothermal flow calorimeter developed in this work mainly consists of an inlet tube, an expansion tube, three cylinders, two heaters and a thermal insulator. In the design of the calorimeter, attention was given to (1) achienement of an isothermal system and (2) thermal insulation of the calormeter. For the former, two heaters were used and were controlled independently. a manually operated heater coiled arount the expansion tube was controlled slightly below the inlet gas temperature. Another heater was coiled around the cylinder of the most interior side and prerated to adjust to the inlet gas temperature using a P.I.D controller. For the latter, the inlet tube was coiled around the cylinders to prevent teat transfer through it Acrylic resin and foam polystyrene were used in the greater part of the calorimeter to reduce the heat capacity of the calorimeter and to prevent heat transfer through it. Moreover, the size of particles in the expansion tube was varied to obtain an optimum flow rate of the outlet gas.2. Measurement of enthalpies for N_2 and CO_2: Enthalpy measurements for N_2 were performed at temperatures 298.15K and 313.15K and pressures up to 5MPa. Average deviation between our data and their smoothed curve was found to be a very small value, 1.28J/mol. In addition, our data is in excellent agreement with literature values and with calculations by Jacobsen's equation of state. Also good results were obtained for CO_2.3. Measurement of enthalpies for a mixture: Enthalpies were measured for a the mixture of N_2 and CO_2 at a temperature of 298.15K and pressures 1.0MPa, 1.5Pa and 2.0MPa. Good agreement was obtained between our results and calculations by BWRS equation of state.

在本工作中，开发了一种新型量热计，并用它测量了高压气体的热函。 1．新型量热仪的研制：本工作研制的等温流动量热仪主要由入口管、膨胀管、三个气缸、两个加热器和一个绝热体组成。在热量计的设计中，重点关注（1）等温系统的实现和（2）热量计的隔热。对于前者，使用两个加热器并独立控制。盘绕膨胀管的手动加热器被控制为略低于入口气体温度。另一个加热器盘绕在最内侧的气缸周围，并使用 P.I.D 控制器进行预先设定以调节入口气体温度。对于后者，入口管盘绕在圆柱体周围，以防止乳头通过它传递。热量计的大部分使用丙烯酸树脂和泡沫聚苯乙烯，以降低热量计的热容量并防止热量通过它传递。并通过改变膨胀管内颗粒的尺寸来获得最佳的出口气体流量。 2． N_2和CO_2的热函测量：N_2的热函测量是在温度298.15K和313.15K以及压力高达5MPa的条件下进行的。我们的数据与其平滑曲线之间的平均偏差非常小，为 1.28J/mol。此外，我们的数据与文献值以及雅各布森状态方程的计算结果非常一致。 CO_2.3也获得了良好的结果。混合物热函的测量：在温度298.15K、压力1.0MPa、1.5Pa和2.0MPa下测量N_2和CO_2的混合物的热函。我们的结果与 BWRS 状态方程的计算结果非常吻合。