Development of a Database System for the Thermophysical Properties of Fluid Mixtures

1981年设计和建立了一个新的数据库系统，以便尽快向科学技术界提供最新和最可靠的流体热物理性质的数值数据。该数据库涉及340种纯流体在7种方便物理状态下的12种物性数据。该系统的一个显著特点是提供了一个由10种检索程序组成的检索系统。自1981年以来，该数据库已向公众开放，从流体混合物的数据的工业重要性，目前的工作计划将该数据库系统扩展到混合物。本年度取得的主要成果有：1）混合料性能数据的选择与输入;在对已有数据进行严格评估后，输入了二元混合物的密度、压缩因子、比热等热力学性质。为了弥补混合物实验数据的不足，我们研究了各种混合规则，从纯组分的可用数据计算混合物的性质。3）对现有的流体混合物数据库的结构和功能进行了综合评价。

A new database system was designed and constructed in 1981, in order to provide the newest and most reliable numerical data on thermophysical properties of fluids to the scientific and technical community as quickly as possible. The database was concerned with 12 kinds of property data of 340 pure fluids under all conditions of 7 convenient physical states. One of distinguishing features of the system is to provide a retrieval system consisting of 10 kinds of retrieval routines. Since 1981, the database has been opened to the public.From the industrial importance of data of fluid mixtures, the present work was planned to expand this database system to mixtures. The accomplishments in this year are summarized as follows:1) Selection and input of property data for mixtures ... Thermodynamic properties, such as density, compressibility factor, specific heat of binary mixtures, have been input after the critical evaluation of existing data.2) Selection of the mixing rules ... In order to cover the lack of experimental data for mixtures, various mixing rules are examined to calculate the properties of mixtures from the available data of pure components. Nearly 30 rules are input and a program is designed to select the appropriate formulas among them.3) The comprehensive evaluation of the complete system has been made concerning to the structure and the functions of the present database for fluid mixtures.