1. Phase Change Materials (PCM)
5th Lecture
By: Dr. Salahaddin Yasin

2. Outline Introduction What is a PCM PCM physical principle and behavior
Water as a PCM
PCM Classification
PCM general applications
PCM applications in building
Case study
PCM role in sustainability
PCM challenges
Further research
Conclusions
Suggestions

3. What is a PCM Definition
A phase-change material (PCM) is a substance presenting a high heat of fusion, and capable of storing and releasing large amounts of energy. Heat energy is absorbed or released when the material changes from solid to liquid phase and vice versa, thus, being classified as latent heat storage (LHS) units.

4. PCM classification

5. PCM application in building
ORGANIC
INORGANIC
Advantages
◦ availability in a large temperature range
◦ freeze without much super cooling
◦ ability to melt congruently
◦ self nucleating properties
◦ compatibility with construction materials
◦ no segregation
◦ chemically stable
◦ high heat of fusion
◦ safe and non-reactive
◦ recyclable
◦ high volumetric latent heat storage capacity
◦ low cost and easy availability
◦ sharp phase change
◦ high thermal conductivity
◦ non-flammable
Disadvantages
◦ low thermal conductivity,
◦ low volumetric latent heat storage capacity
◦ flammable (depending on containment)
◦ high volume change
◦ super cooling
◦ segregation

6. PCM application in building
• PCM integrated into the building structure