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Ekmandagarna 2019
Pecha Kucha
Sundblads Pecha Kucha
• 20 bilder visas 20 sekunder var
• Bedömningskriterier• Utförande (50%)
• Innehåll (50%)
• Ledamöter i Juryn1. Birgitta Sundblad
2. Monica Ek
3. Anneli Petersson
4. Rickard Wadsborn
5. Publiken• Gå efter sista presentationen in på www.menti.com och ange koden 44 01 20
• Fördela 100 poäng på de tio presentationerna, med lika vikt på Utförande och Innehåll.
1. Multifunctional transparent wood for energy storage applicationCéline Montanari, KTH
Multifunctional transparent wood for energy storage application
Céline Montanari, KTH
Transparent wood for thermal energy storage
applications
Céline Montanari
KTH Royal Institute of Technology | Wallenberg Wood Science Center
Supervisor: Prof. Lars Berglund
1/3 of the global energy consumption comes from the building sector
Could we gain energy from a window ?
Thermal Energy Storage systems can store solar energy
Phase-Change Materials can store and release heat
Applications of Phase-Change Materials
Challenges when using Phase-Change Materials
melting
Insulating materials are necessary for energy efficient buildings
Glass
~1 W K-1 m-1
Wood
~ 0.1 W K-1 m-1
Wood as a load-bearing material
Functionalization of the wood template
SEM image of birch wood (transverse view)
polymer infiltration
Native wood
Functionalized
wood
Gaining energy from a window
Solar
energyWood
Light-transmitting materials from wood ?
air
Cell wall
Transparent Wood Preparation
1. Delignification
(NaClO2)
2. Infiltration of
Phase-change
material
Heat-storage
Transparent Wood
Native wood Delignified wood
Heat-Storage Transparent Wood – Concept
Daytime – liquid (T > Tm) Night – solid (T < Tm)
30 oC 15 oC
Thermal Properties
Heat storage capacity of the composite
~80 J/g
Optical Properties
Increase by 6 %
(optical transmittance)
22 oC 35 oC
Mechanical Properties
10 times tougher than glass !
Summary
Load-bearing materialHigh energy density
Large heat storage capacity Switchable transparency
Heat-Storage Transparent Wood
Applications
Thank you for your attention !
Contact Information:
Céline Montanari | [email protected]
AcknowledgementsProf. Lars BerglundBiocomposites division, KTH Wallenberg Wood Science Center