Thermo-optical performance of molecular solar thermal energy storage films
Artikel i vetenskaplig tidskrift, 2022

Due to their potential for solar energy harvesting and storage, molecular solar thermal energy storage (MOST) materials are receiving wide attention from both the research community and the public. MOST materials absorb photons and convert their energy to chemical energy, which is contained within the bonds of the MOST molecules. Depending on the molecular structure, these materials can store up to 1 MJ/kg, at ambient temperature and with storage times ranging from minutes to several years. This work is the first to thoroughly investigate the potential of MOST materials for the development of energy saving windows. To this end, the MOST molecules are integrated into thin, optically transparent films, which store solar energy during the daytime and release heat at a later point in time. A combined experimental and modeling approach is used to verify the system's basic functionality and identify key parameters. Multi-physics modeling and simulation were conducted to evaluate the interaction of MOST films with light, both monochromatic and the entire solar spectrum, as well as the corresponding dynamic energy storage. The model was experimentally verified by studying the optical response of thin MOST films containing norbornadiene derivatives as a functional system. We found that the MOST films act as excellent UV shield and can store up to 0.37 kWh/m2 for optimized MOST molecules. Further, this model allowed us to screen various material parameters and develop guidelines on how to optimize the performance of MOST window films.

Energy saving

Coating

Solar energy storage

Simulation

Molecular solar thermal energy storage

Multiphysical modeling

Författare

Zakariaa Refaa

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Anna Hofmann

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Marcial Fernandez Castro

Danmarks Tekniske Universitet (DTU)

Jessica Orrego Hernandez

Teknisk ytkemi

Zhihang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Helen Hölzel

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Jens Wenzel Andreasen

Danmarks Tekniske Universitet (DTU)

Kasper Moth-Poulsen

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Angela Sasic Kalagasidis

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Applied Energy

0306-2619 (ISSN) 18729118 (eISSN)

Vol. 310 118541

Molecular Solar Thermal energy storage systems (MOST)

Europeiska kommissionen (EU) (EC/H2020/951801), 2020-09-01 -- 2024-02-29.

Energimyndigheten (2019-010724), 2019-05-07 -- 2019-09-03.

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Annan materialteknik

DOI

10.1016/j.apenergy.2022.118541

Mer information

Senast uppdaterat

2022-02-02