Engineers Edge

Enthalpy Temperature (h-T) Diagram - Thermodynamics

Thermodynamics Directory | Heat Transfer Directory

Enthalpy Temperature (h-T) Diagram

An Enthalpy Temperature h-T diagram exhibits the same features as on the previous property diagrams. Figure 12 is the h-T diagram for pure water. An h-T diagram can be constructed for any pure substance. As in the previous property diagrams, there are regions on the h-T diagram in which two phase sexist together. The region between the saturated liquid line and the saturated vapor line represents the area of two phases existing at the same time. The vertical distance between the two saturation lines represents the latent heat of vaporization. If pure water existed at point Aon the saturated liquid line and an amount of heat was added equal to the latent heat of vaporization, then the water would change phase from a saturated liquid to a saturated vapor(point B), while maintaining a constant temperature. As shown in Figure 12, operation outside the saturation lines results in a sub-cooled liquid or superheated steam.

Enthalpy Temperature (h-T) Diagram

The quality of the mixture at any point in the liquid-vapor region can be found using the same relationship as shown for the P-h diagram.

Contribute Article Spider Optimizer

© Copyright 2000 - 2019, by Engineers Edge, LLC
All rights reserved
Disclaimer | Feedback
Advertising | Contact | Privacy Policy


Spider Optimizer

Engineering Book Store
Engineering Forum
Excel App. Downloads
Online Books & Manuals
Engineering News
Engineering Videos
Engineering Calculators
Engineering Toolbox
GD&T Training Geometric Dimensioning Tolerancing
DFM DFA Training
Training Online Engineering
Advertising Center

Copyright Notice

Publishing Program