Research and application of experimental teaching equipment for temperature and pressure characteristics of saturated steam and supercritical phenomenon.

In order to improve the teaching level of engineering thermodynamics experiments and deepen students' understanding of the temperature and pressure characteristics of saturated gases and the concept of supercritical fluids, this article develops an experimental teaching equipment for saturated steam pressure temperature characteristics and supercritical phenomena. This equipment consists of a steam generation system and a data acquisition system, equipped with a large window with a diameter of 60 mm and an automatic control program, which has good visibility, safety, and operability. During the teaching process, four different refrigerants with different properties are used as research objects and teaching projects such as "Research on pressure temperature characteristics of saturated steam" and "Demonstration of critical ophthalmic phenomenon" are established. Through this experimental course, students can enhance their understanding of the micro meanings of pressure and temperature, as well as the concepts of gas-liquid equilibrium in saturated states. They can master common methods and characteristics of pressure and temperature measurement and understand commonly used data processing and error analysis methods. At the same time, students can deepen their understanding of material phases by observing the mutual transformation process between subcritical and supercritical fluids. [ABSTRACT FROM AUTHOR]