Single-Course English 5 ECTS

Exergy analysis

Overall Course Objectives

Efficient handling of energy becomes increasingly important whether we choose to base the future energy system on renewable energy, or we continue to consume the fossil reserves. The 1st law of thermodynamics states that energy is conserved and can neither be created, nor consumed, so why do we have problems with energy? It is typically the usable part of the energy that is decisive and of interest in energy analyses, so why not put it into system by the term exergy. The student will understand the concept of exergy and will be able to apply it to different subprocesses which can be combined into more complex systems. The course will also provide a better understanding of reversibility, entropy and sustainability in our energy systems as well as in a broader sense.

Learning Objectives

  • Explain the concept of entropy as a practical abstraction
  • Account for the difference between reversible and irreversible processes
  • Explain the term exergy as a measure of the quality of the energy and its ability to perform work
  • Account for the difference between energy efficiency and exergy efficiency
  • Calculate exergy consumption in common physical processes
  • Calculate exergy consumption in chemical processes
  • Carry out an exergy analysis on a system with some complexity
  • Identify the most irreversible steps in a process
  • Assess exergy consumption in energy conversion processes

Course Content

The 1st and the 2nd laws of thermodynamics. A more thorough introduction to the concept of entropy than is normally seen at introductory courses on thermodynamics. Assessment of popular descriptions of entropy as disorder, scattering, information and the arrow of time. Exergy as a measure of energy quality. Exergy consumption in physical processes. Exergy consumption in chemical processes. Exergy analysis of selected systems such as cooling machines, engines, fuel cells, chemical industry and electricity production.

Teaching Method

Study in groups based on textbook and notes. Ca. four modules with teacher.
The course will be subject to evaluation during the course period


Limited number of seats

Minimum: 10.

Please be aware that this course will only be held if the required minimum number of participants is met. You will be informed 8 days before the start of the course, whether the course will be held.

See course in the course database.





13 weeks




DTU Lyngby Campus

Course code 47317
Course type Candidate
Semester start Week 35
Semester end Week 48
Days Thurs 13-17

7.500,00 DKK

Please note that this course has participants limitation. Read more