Abstract
In this paper, various real gas state equations are considered and their comparative analysis is carried out. The following state equations are studied in the work: Benedict-Webb-Rubin modification equation, Ridlich-Kwong Real Gas equation, Peng-Robinson Real Gas equation, and the modified Ridlich-Kwong real gas state equations proposed by Barsuk S.D. We have made a direct comparison of these calculation methods with most accurate identification. In addition, the paper analyzes the equations features, with applicability limits definition of each state equations. For the chosen one, as the most universal and exact equation, the calculations were made for the liquid phase and the real gas two-phase state. Based on the data obtained, polynomials were developed for various parameters depending on the gas temperature, which can later be used to build various mathematical models. Our conclusions show main advantages of selected equation for real gases and the reasons for choosing it for modeling low-temperature heat and mass transfer processes.
Highlights
The basis for most modern design, calculation or analysis of gas equipment is the calculation of the thermodynamics of the working environment
This equation of state was derived from extrapolation of experimental data on the thermophysical parameters of the pure components of a mixture of real gas, which means that for the correct calculation using this empirical-analytical computational method of thermodynamic calculation of real gas, it is necessary to know the individual coefficients for each such component included in the desired mixture, and their interaction with each other or the amount, in terms of physical interaction within the mixture, according to this method is taken into account closer nym equations taken from either approximate law states or from the combination of rules for gas mixtures [6]
A comparative calculation of the BWR, PengRobinson equation of state (PR) and Ridlich-Kwong equation of state (RK) methods will be given, as well as a comparison of the results of PR and RK calculations with the data obtained in the calculation in the RefProp software module used in industrial calculations
Summary
The basis for most modern design, calculation or analysis of gas equipment is the calculation of the thermodynamics of the working environment. By gas equipment is meant directly gas, as well as oil and gas, chemical and other equipment working with gas or a two-phase liquid-gas medium, including: compressors, turbines, heat exchangers and more. Under the working environment is meant real gas in a gas, liquid or adjacent phase. Thermodynamic calculation refers directly to the calculation of the thermodynamic parameters of a real gas, including compressibility, density, temperature, pressure, etc. The issue of calculating the thermodynamics of the working environment is relevant only for the calculation of real gases. To solve the problems of designing, calculating or analyzing equipment with a similar working environment, it is necessary to apply the equations of state of real gas
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
