1. Yasmin Simmons
Tomer Hananel
Tamás Álmos Vámi
PCM
How can we use Phase Change Materials to sustain house temperature without electricity?

2. Introduction Problems: climate crisis greenhouse gas emissions
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
Problems:
climate crisis
greenhouse gas emissions
air pollution
usage of finite resources

3. Introduction Introduction What are PCM’s? Our Idea Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

4. Introduction Green building Introduction What are PCM’s? Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

5. What are PCM’s? Solid Absorbs heat Liquid Releases heat
Temperature is above melting point
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
Releases heat
Solid
Temperature is bellow melting point

6. Our Idea Storing PCM’s in the walls of the house
The goal is to sustain a specific temperature range for human comfort
Decreasing the usage of energy by replacing air conditioners
Used for heating the house in winter and cooling in summer
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

7. Our Idea PCM’s Organic Paraffins Non-Paraffins Non-organic
Salt hydrate
Metallics
Eutectic
Our Idea
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
Our solution is paraffins
Formula:
CnH2n+2

8. Paraffins Advantages: Disadvantage: Safety Reliability & Stability
Predicability
Low cost
Non-corrosive
Little volume change
Disadvantage:
Moderately flamability
Non-compatible with all plastic
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

9. Paraffins 𝑛 𝐶𝑂+ 2𝑛+1 𝐻 2 → 𝐶 𝑛 𝐻 2𝑛+2 +𝑛 𝐻 2 𝑂 How to produce:
Fischer-Tropsch reaction:
Using catalysis
Cobalt catalysator
200 °C
bar (2*107 Pa)
𝑛 𝐶𝑂+ 2𝑛+1 𝐻 2 → 𝐶 𝑛 𝐻 2𝑛+2 +𝑛 𝐻 2 𝑂
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

10. Paraffins Heptadecane C17H36 Octadecane C18H38 Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
Octadecane
C18H38

11. Paraffins Introduction What are PCM’s? Our Idea Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

12. Difficulties & Solutions
Problems:
Flamability
Liquid phase
Outside temperature
Our solution:
Polyacrylate layer inside
Polystyrene layer outside
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

13. PCM Inside Outside Polystyrene Application Polyacrylate Introduction
Wall structure
Inside
Polyacrylate
PCM
Polystyrene
Outside
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
~2 mm
~2 cm
~2 mm
~2 cm

14. Conclusion Use paraffins: Storage in walls Heptadecane Octadecane
Polyacrylate layer encapsulating
Polystyrene layer outside the PCM
The PCM will function as a green heater or cooler with no use of electricity and no damage or pollution.
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

15. Conclusion Total Cost per wall FINAL PRICE per house:
50kg of PCM → Octadecane 2100$
Heptadecane 8500$
150kg of Polyacrylate → 225$
130kg of Polystyrene → 195$
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans
FINAL PRICE per house:
Octadecane 4∙2520$
Heptadecane 4∙8920$

16. Conclusion
Avarage cost of electricty usage for heating/cooling a house: 5000$ per year
Octadecane- profitable after 2 years
Heptadecane- profitable after 8 years
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

17. Thank you for listening!
Future Plans
Finding a PCM that has a melting point of 25°C with low costs
Creating it using a mixture of paraffins
Applying this method in houses around the world
Saving energy!!!!!!!!!!!!!!
Thank you for listening!
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans

18. Resources Introduction What are PCM’s? Our Idea Paraffins
Pasupathy et al: Phase change material-based building architecture for thermal management in residential and commercial establishments, In: Renewable and Sustainable Energy Reviews (2008)
Sánchez et al: Microencapsulation of PCMs with a polystyrene shell, In: Colloid Polym Sci (2007)
rganic/n-OCTADECANE.htm
Structure html
A. Sharma et al. Review on thermal energy storage with phase change materials and application In: Renewable and Sustainable Energy Reviews 13 (2009)
Introduction
What are PCM’s?
Our Idea
Paraffins
Difficulties & Solutions
Application
Conclusion
Future plans