Phase Change Materials

Phase change material thermophysical property tableModeling the Latent Heat of Fusion

Tracking the energy of a phase change can be difficult if your software isn't designed to handle it. One trick of yesteryear was to create a spike in the thermal capacitance versus temperature table, but this is not particularly accurate and can cause problems with convergence. Thermal DesktopĀ® provides a user friendly interface for defining the thermophysical properties of a phase changing materials, and SINDA/FLUINT accurately models this energy. This interface allows for a liquid/solid phase change as well as an additional solid/solid. 

This can be applied to something as simple as melting ice, but specific phase-change materials (PCMs) are designed to be used across many industries such as solar thermal storage, solar power plants, medical devices, electronics, spacecraft, and food storage. The intent is to absorb or release significant amounts of energy while maintaining a constant temperature. 

A sample model was created to show how to set up a phase change material. A transmitter is mounted to a convectively cooled aluminum plate. The transmitter is in a low power mode most of the time, but at fixed intervals it goes into a high power mode to transmit. A PCM was applied to the aluminum plate to dampen the thermal response of the transmitter. 

Comparing transmitter temperatures with and without PCM

This example is available on our User Forum

Thermal Desktop, RadCAD, and TD Direct in-class training

Date: September 19-22, 2017, 8:00 a.m. to 5:00 p.m., daily
Location: Lakewood, CO

CRTech will be hosting introductory training for Thermal Desktop, RadCAD and TD Direct. Lecture and hands-on tutorials introduce attendees to basic Thermal Desktop and RadCAD usage and allow practice building models and interpreting results. The class will also introduce students to SpaceClaim direct modeling CAD interface and advanced meshing tools in TD Direct.

Daily Schedule

Day 1 and 2: Introduction to SINDA and Thermal Desktop
Day 3: Introduction to RadCAD
Day 4: Introduction to TD Direct
 

To learn more about this class and to register, visit our Training Page.