液体trans-1,2-二乙烯 (R-1130(E) 的热导率:测量和建模
Karim S Al-Barghouti1, Aaron J Rowane2, Ian H Bell2
1Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045, USA.
概括
通过实验确定了trans-1,2-dichloroethene (R-1130(E)) 的精确导热数据. 剩余缩 (RES) 模型准确地预测了这些值,超过了扩展相应状态 (ECS) 模型.
科学领域:
- 热力学是一种热力学.
- 流体属性 流体属性
- 化学工程是化学工程的重要组成部分.
背景情况:
- 准确的热物理性质数据对于化学过程设计和优化至关重要.
- 液态转基-1,2-二乙烯 (R-1130(E)) 是一种具有潜在工业应用的化合物,需要可靠的性能数据.
- 现有的预测模型需要对特定化合物的实验数据进行验证.
研究的目的:
- 在广泛的温度和压力范围内实验测量液体转-1,2-二乙烯 (R-1130(E)) 的导热率.
- 使用生成的数据评估扩展相应状态 (ECS) 和余缩放 (RES) 模型的预测精度.
- 为了比较这些模型在预测和拟合模式中的性能.
主要方法:
- 用一个短暂的热线仪器进行热导率测量.
- 在240K至340K的温度和高达25MPa的压力下收集数据.
- 一个体积翻译的-罗宾逊状态方程被用于热力学属性计算.
主要成果:
- 获得了447个实验导热数据点,总的不确定性为1.4%.
- 在预测模式下,RES模型实现了2.55%的平均绝对相对偏差 (ΔAARD),明显优于ECS模型的6.89%.
- 当与数据相匹配时,这两种模型都在测量不确定性范围内准确地表示了实验结果.
结论:
- 与ECS模型相比,RES模型对R-1130 (E) 的导热性能具有更高的预测能力.
- 实验数据对于验证和改进热物理性质预测模型至关重要.
- 生成的数据集为研究人员和工程师提供了有价值的资源,他们与R-1130工作.
相关概念视频
Clausius-Clapeyron Equation
55.8K
The equilibrium between a liquid and its vapor depends on the temperature of the system; a rise in temperature causes a corresponding rise in the vapor pressure of its liquid. The Clausius-Clapeyron equation gives the quantitative relation between a substance’s vapor pressure (P) and its temperature (T); it predicts the rate at which vapor pressure increases per unit increase in temperature.
55.8K
Conduction, Convection and Radiation: Problem Solving
1.2K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.2K
Constant Pressure Calorimetry
84.6K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
84.6K
Thermodynamics: Activity Coefficient
1.3K
Activity is the measure of the effective concentration of the species in solution. It can be expressed as the product of the molar concentration of the species and its activity coefficient. The activity coefficient is a dimensionless quantity and depends on the total ionic strength of the solution.
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...
1.3K
Distillation: Vapor–Liquid Equilibria
2.7K
Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
2.7K
Quantifying Heat
53.9K
Thermal Energy
53.9K


