Comprehensive explanation of Fundamental of Engineering Thermodynamics

1. Engineering Thermodynamics
Chapter-1 Introduction-Basic Concepts
Concept -4: Thermodynamics Process, Path, Cycle, Steady flow
Highlights
- Understanding of Concept
- Notes
- Problems
Video link for detailed explanation:
https://www.youtube.com/watch?v=FY0J7tnfCjU
By Rahul Agrawal
B.Tech from NIT-Bhopal
M.Tech from IIT-Bombay
GATE AIR: 127, IES qualified
Freelancer Tutor

2. Thermodynamic Process:
 Any change that a system undergoes from one equilibrium state to
another is called a process.
 Process diagrams plotted by employing thermodynamic properties
as coordinates are very useful in visualizing the processes.
 Some common properties that are used as coordinates are
temperature T, pressure P, and volume V.
Example: i) Isochoric process is a process during which the Volume V
remains constant;
ii) Isobaric process during which the pressure P remains
constant;
Thermodynamics Process, Path, Cycle, Steady flow

3. Path: the series of states through which a system passes during a process is called the path of the process.
Quasistatic, or Quasi-equilibrium process:
 When a process proceeds in such a manner that the system remains infinitesimally close to an equilibrium
state at all times, it is called a quasistatic, or quasi-equilibrium, process.
 Quasi-equilibrium process is an idealized process and is not a true representation of an actual process.
 Nonquasi-equilibrium processes, not able to characterize the entire system by a single state, and thus
cannot speak of a process path for a system as a whole
Thermodynamics Process, Path, Cycle, Steady flow

4. Cycle:
• A system is said to have undergone a cycle if it returns to its initial state at the end of the process.
• That is, for a cycle the initial and final states are identical.
Thermodynamics Process, Path, Cycle, Steady flow

5. Steady-Flow Process:
 Steady implies no change with time, opposite of steady is unsteady, or transient.
 Fluid properties can change from point to point within the control volume, but at any fixed point they remain the
same during the entire process.`
 Volume V, the mass m, and the total energy content E of the control volume remain constant during a steady
flow process.
Uniform-Flow: The term uniform, however, implies no change with location over a specified region
Thermodynamics Process, Path, Cycle, Steady flow

6. Video link for detailed explanation:
https://www.youtube.com/watch?v=FY0J7tnfCjU