Thermodynamics Directory | Heat Transfer Directory

A T-s diagram is the type of diagram most frequently used to analyze energy transfer systemcycles. This is because the work done by or on the system and the heat added to or removedfrom the system can be visualized on the T-s diagram. By the definition of entropy, the heattransferred to or from a system equals the area under the T-s curve of the process. Figure 13 is the T-s diagram for pure water. A T-s diagram can be constructed for any pure substance. Itexhibits the same features as P-u diagrams.