Abstract
In the steam power plant, the working medium used for energy transformation is water vapor. The thermodynamic properties of water vapor are usually obtained by using water vapor tables and charts. Adiabatic process of water vapor is widespread in engineering applications. The adiabatic process is realized without heat addition or rejection and the entropy of the working medium during a reversible adiabatic process remains constant. During an adiabatic expansion process, superheated steam turns into saturated vapor , and further into wet vapor, the pressure and the temperature of the steam decreases. The entropy during a irreversible adiabatic process increases. In general, when analyzing the thermodynamic process of water vapor, we first determine the state parameters by using charts and tables, and then make relevant calculations according to the first law of thermodynamics.
Highlights
The adiabatic process is a process in the steam power plant cycle, such as the expansion process of steam in the steam turbine and the pressure rise process of water in the water pump
According to the thermodynamic property table of water vapor, the state parameters of water vapor in different states can be determined, so as to further calculate the physical quantities such as the work exchanged between the system and the outside world in the thermodynamic process
The expansion process of steam in turbine, the compression process of water in pump and the compression process of refrigerant in compressor can be regarded as adiabatic process
Summary
The adiabatic process is a process in the steam power plant cycle, such as the expansion process of steam in the steam turbine and the pressure rise process of water in the water pump. If the irreversible loss such as friction is not considered in the adiabatic process, the entropy of the working medium remains constant. The water vapor thermodynamic analysis is based on the first and the second laws of thermodynamics. For an adiabatic process of water vapor, if the initial parameters are pressure p1 and temperature t1, and the final parameter is p2, the initial and final state points and process lines of the process can be determined on the h-s diagram, as shown by a straight line 1-2 in Figure 1[1].The T-s diagram of the process is shown in Figure 2[2]
Sign-in/Register to view highlights & summary 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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
